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ruby--ruby/string.c
Burdette Lamar 5588aa79d4
What's Here for Symbol (#5289) 
* What's Here for Symbol
2021-12-17 17:02:12 -06:00

12538 lines
324 KiB
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/**********************************************************************
string.c -
$Author$
created at: Mon Aug 9 17:12:58 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "ruby/internal/config.h"
#include <ctype.h>
#include <errno.h>
#include <math.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "debug_counter.h"
#include "encindex.h"
#include "gc.h"
#include "id.h"
#include "internal.h"
#include "internal/array.h"
#include "internal/compar.h"
#include "internal/compilers.h"
#include "internal/encoding.h"
#include "internal/error.h"
#include "internal/gc.h"
#include "internal/numeric.h"
#include "internal/object.h"
#include "internal/proc.h"
#include "internal/re.h"
#include "internal/sanitizers.h"
#include "internal/string.h"
#include "internal/transcode.h"
#include "probes.h"
#include "ruby/encoding.h"
#include "ruby/re.h"
#include "ruby/util.h"
#include "ruby_assert.h"
#include "vm_sync.h"
#if defined HAVE_CRYPT_R
# if defined HAVE_CRYPT_H
# include <crypt.h>
# endif
#elif !defined HAVE_CRYPT
# include "missing/crypt.h"
# define HAVE_CRYPT_R 1
#endif
#define BEG(no) (regs->beg[(no)])
#define END(no) (regs->end[(no)])
#undef rb_str_new
#undef rb_usascii_str_new
#undef rb_utf8_str_new
#undef rb_enc_str_new
#undef rb_str_new_cstr
#undef rb_tainted_str_new_cstr
#undef rb_usascii_str_new_cstr
#undef rb_utf8_str_new_cstr
#undef rb_enc_str_new_cstr
#undef rb_external_str_new_cstr
#undef rb_locale_str_new_cstr
#undef rb_str_dup_frozen
#undef rb_str_buf_new_cstr
#undef rb_str_buf_cat
#undef rb_str_buf_cat2
#undef rb_str_cat2
#undef rb_str_cat_cstr
#undef rb_fstring_cstr
VALUE rb_cString;
VALUE rb_cSymbol;
/* FLAGS of RString
*
* 1: RSTRING_NOEMBED
* 2: STR_SHARED (== ELTS_SHARED)
* 2-6: RSTRING_EMBED_LEN (5 bits == 32)
* 5: STR_SHARED_ROOT (RSTRING_NOEMBED==1 && STR_SHARED == 0, there may be
* other strings that rely on this string's buffer)
* 6: STR_BORROWED (when RSTRING_NOEMBED==1 && klass==0, unsafe to recycle
* early, specific to rb_str_tmp_frozen_{acquire,release})
* 7: STR_TMPLOCK (set when a pointer to the buffer is passed to syscall
* such as read(2). Any modification and realloc is prohibited)
*
* 8-9: ENC_CODERANGE (2 bits)
* 10-16: ENCODING (7 bits == 128)
* 17: RSTRING_FSTR
* 18: STR_NOFREE (do not free this string's buffer when a String is freed.
* used for a string object based on C string literal)
* 19: STR_FAKESTR (when RVALUE is not managed by GC. Typically, the string
* object header is temporarily allocated on C stack)
*/
#define RUBY_MAX_CHAR_LEN 16
#define STR_SHARED_ROOT FL_USER5
#define STR_BORROWED FL_USER6
#define STR_TMPLOCK FL_USER7
#define STR_NOFREE FL_USER18
#define STR_FAKESTR FL_USER19
#define STR_SET_NOEMBED(str) do {\
FL_SET((str), STR_NOEMBED);\
if (USE_RVARGC) {\
FL_UNSET((str), STR_SHARED | STR_SHARED_ROOT | STR_BORROWED);\
}\
else {\
STR_SET_EMBED_LEN((str), 0);\
}\
} while (0)
#define STR_SET_EMBED(str) FL_UNSET((str), (STR_NOEMBED|STR_NOFREE))
#if USE_RVARGC
# define STR_SET_EMBED_LEN(str, n) do { \
assert(str_embed_capa(str) > (n));\
RSTRING(str)->as.embed.len = (n);\
} while (0)
#else
# define STR_SET_EMBED_LEN(str, n) do { \
long tmp_n = (n);\
RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)
#endif
#define STR_SET_LEN(str, n) do { \
if (STR_EMBED_P(str)) {\
STR_SET_EMBED_LEN((str), (n));\
}\
else {\
RSTRING(str)->as.heap.len = (n);\
}\
} while (0)
#define STR_DEC_LEN(str) do {\
if (STR_EMBED_P(str)) {\
long n = RSTRING_LEN(str);\
n--;\
STR_SET_EMBED_LEN((str), n);\
}\
else {\
RSTRING(str)->as.heap.len--;\
}\
} while (0)
#define TERM_LEN(str) rb_enc_mbminlen(rb_enc_get(str))
#define TERM_FILL(ptr, termlen) do {\
char *const term_fill_ptr = (ptr);\
const int term_fill_len = (termlen);\
*term_fill_ptr = '\0';\
if (UNLIKELY(term_fill_len > 1))\
memset(term_fill_ptr, 0, term_fill_len);\
} while (0)
#define RESIZE_CAPA(str,capacity) do {\
const int termlen = TERM_LEN(str);\
RESIZE_CAPA_TERM(str,capacity,termlen);\
} while (0)
#define RESIZE_CAPA_TERM(str,capacity,termlen) do {\
if (STR_EMBED_P(str)) {\
if (str_embed_capa(str) < capacity + termlen) {\
char *const tmp = ALLOC_N(char, (size_t)(capacity) + (termlen));\
const long tlen = RSTRING_LEN(str);\
memcpy(tmp, RSTRING_PTR(str), tlen);\
RSTRING(str)->as.heap.ptr = tmp;\
RSTRING(str)->as.heap.len = tlen;\
STR_SET_NOEMBED(str);\
RSTRING(str)->as.heap.aux.capa = (capacity);\
}\
}\
else {\
assert(!FL_TEST((str), STR_SHARED)); \
SIZED_REALLOC_N(RSTRING(str)->as.heap.ptr, char, \
(size_t)(capacity) + (termlen), STR_HEAP_SIZE(str)); \
RSTRING(str)->as.heap.aux.capa = (capacity);\
}\
} while (0)
#define STR_SET_SHARED(str, shared_str) do { \
if (!FL_TEST(str, STR_FAKESTR)) { \
assert(RSTRING_PTR(shared_str) <= RSTRING_PTR(str)); \
assert(RSTRING_PTR(str) <= RSTRING_PTR(shared_str) + RSTRING_LEN(shared_str)); \
RB_OBJ_WRITE((str), &RSTRING(str)->as.heap.aux.shared, (shared_str)); \
FL_SET((str), STR_SHARED); \
FL_SET((shared_str), STR_SHARED_ROOT); \
if (RBASIC_CLASS((shared_str)) == 0) /* for CoW-friendliness */ \
FL_SET_RAW((shared_str), STR_BORROWED); \
} \
} while (0)
#define STR_HEAP_PTR(str) (RSTRING(str)->as.heap.ptr)
#define STR_HEAP_SIZE(str) ((size_t)RSTRING(str)->as.heap.aux.capa + TERM_LEN(str))
/* TODO: include the terminator size in capa. */
#define STR_ENC_GET(str) get_encoding(str)
#if !defined SHARABLE_MIDDLE_SUBSTRING
# define SHARABLE_MIDDLE_SUBSTRING 0
#endif
#if !SHARABLE_MIDDLE_SUBSTRING
#define SHARABLE_SUBSTRING_P(beg, len, end) ((beg) + (len) == (end))
#else
#define SHARABLE_SUBSTRING_P(beg, len, end) 1
#endif
static inline long
str_embed_capa(VALUE str)
{
#if USE_RVARGC
return rb_gc_obj_slot_size(str) - offsetof(struct RString, as.embed.ary);
#else
return RSTRING_EMBED_LEN_MAX + 1;
#endif
}
static inline size_t
str_embed_size(long capa)
{
return offsetof(struct RString, as.embed.ary) + capa;
}
static inline bool
STR_EMBEDDABLE_P(long len, long termlen)
{
#if USE_RVARGC
return rb_gc_size_allocatable_p(str_embed_size(len + termlen));
#else
return len <= RSTRING_EMBED_LEN_MAX + 1 - termlen;
#endif
}
static VALUE str_replace_shared_without_enc(VALUE str2, VALUE str);
static VALUE str_new_frozen(VALUE klass, VALUE orig);
static VALUE str_new_frozen_buffer(VALUE klass, VALUE orig, int copy_encoding);
static VALUE str_new_static(VALUE klass, const char *ptr, long len, int encindex);
static VALUE str_new(VALUE klass, const char *ptr, long len);
static void str_make_independent_expand(VALUE str, long len, long expand, const int termlen);
static inline void str_modifiable(VALUE str);
static VALUE rb_str_downcase(int argc, VALUE *argv, VALUE str);
static inline void
str_make_independent(VALUE str)
{
long len = RSTRING_LEN(str);
int termlen = TERM_LEN(str);
str_make_independent_expand((str), len, 0L, termlen);
}
static inline int str_dependent_p(VALUE str);
void
rb_str_make_independent(VALUE str)
{
if (str_dependent_p(str)) {
str_make_independent(str);
}
}
void
rb_debug_rstring_null_ptr(const char *func)
{
fprintf(stderr, "%s is returning NULL!! "
"SIGSEGV is highly expected to follow immediately. "
"If you could reproduce, attach your debugger here, "
"and look at the passed string.",
func);
}
/* symbols for [up|down|swap]case/capitalize options */
static VALUE sym_ascii, sym_turkic, sym_lithuanian, sym_fold;
static rb_encoding *
get_actual_encoding(const int encidx, VALUE str)
{
const unsigned char *q;
switch (encidx) {
case ENCINDEX_UTF_16:
if (RSTRING_LEN(str) < 2) break;
q = (const unsigned char *)RSTRING_PTR(str);
if (q[0] == 0xFE && q[1] == 0xFF) {
return rb_enc_get_from_index(ENCINDEX_UTF_16BE);
}
if (q[0] == 0xFF && q[1] == 0xFE) {
return rb_enc_get_from_index(ENCINDEX_UTF_16LE);
}
return rb_ascii8bit_encoding();
case ENCINDEX_UTF_32:
if (RSTRING_LEN(str) < 4) break;
q = (const unsigned char *)RSTRING_PTR(str);
if (q[0] == 0 && q[1] == 0 && q[2] == 0xFE && q[3] == 0xFF) {
return rb_enc_get_from_index(ENCINDEX_UTF_32BE);
}
if (q[3] == 0 && q[2] == 0 && q[1] == 0xFE && q[0] == 0xFF) {
return rb_enc_get_from_index(ENCINDEX_UTF_32LE);
}
return rb_ascii8bit_encoding();
}
return rb_enc_from_index(encidx);
}
static rb_encoding *
get_encoding(VALUE str)
{
return get_actual_encoding(ENCODING_GET(str), str);
}
static void
mustnot_broken(VALUE str)
{
if (is_broken_string(str)) {
rb_raise(rb_eArgError, "invalid byte sequence in %s", rb_enc_name(STR_ENC_GET(str)));
}
}
static void
mustnot_wchar(VALUE str)
{
rb_encoding *enc = STR_ENC_GET(str);
if (rb_enc_mbminlen(enc) > 1) {
rb_raise(rb_eArgError, "wide char encoding: %s", rb_enc_name(enc));
}
}
static int fstring_cmp(VALUE a, VALUE b);
static VALUE register_fstring(VALUE str, bool copy);
const struct st_hash_type rb_fstring_hash_type = {
fstring_cmp,
rb_str_hash,
};
#define BARE_STRING_P(str) (!FL_ANY_RAW(str, FL_EXIVAR) && RBASIC_CLASS(str) == rb_cString)
struct fstr_update_arg {
VALUE fstr;
bool copy;
};
static int
fstr_update_callback(st_data_t *key, st_data_t *value, st_data_t data, int existing)
{
struct fstr_update_arg *arg = (struct fstr_update_arg *)data;
VALUE str = (VALUE)*key;
if (existing) {
/* because of lazy sweep, str may be unmarked already and swept
* at next time */
if (rb_objspace_garbage_object_p(str)) {
arg->fstr = Qundef;
return ST_DELETE;
}
arg->fstr = str;
return ST_STOP;
}
else {
if (FL_TEST_RAW(str, STR_FAKESTR)) {
if (arg->copy) {
VALUE new_str = str_new(rb_cString, RSTRING(str)->as.heap.ptr, RSTRING(str)->as.heap.len);
rb_enc_copy(new_str, str);
str = new_str;
}
else {
str = str_new_static(rb_cString, RSTRING(str)->as.heap.ptr,
RSTRING(str)->as.heap.len,
ENCODING_GET(str));
}
OBJ_FREEZE_RAW(str);
}
else {
if (!OBJ_FROZEN(str))
str = str_new_frozen(rb_cString, str);
if (STR_SHARED_P(str)) { /* str should not be shared */
/* shared substring */
str_make_independent(str);
assert(OBJ_FROZEN(str));
}
if (!BARE_STRING_P(str)) {
str = str_new_frozen(rb_cString, str);
}
}
RBASIC(str)->flags |= RSTRING_FSTR;
*key = *value = arg->fstr = str;
return ST_CONTINUE;
}
}
RUBY_FUNC_EXPORTED
VALUE
rb_fstring(VALUE str)
{
VALUE fstr;
int bare;
Check_Type(str, T_STRING);
if (FL_TEST(str, RSTRING_FSTR))
return str;
bare = BARE_STRING_P(str);
if (!bare) {
if (STR_EMBED_P(str)) {
OBJ_FREEZE_RAW(str);
return str;
}
if (FL_TEST_RAW(str, STR_NOEMBED|STR_SHARED_ROOT|STR_SHARED) == (STR_NOEMBED|STR_SHARED_ROOT)) {
assert(OBJ_FROZEN(str));
return str;
}
}
if (!OBJ_FROZEN(str))
rb_str_resize(str, RSTRING_LEN(str));
fstr = register_fstring(str, FALSE);
if (!bare) {
str_replace_shared_without_enc(str, fstr);
OBJ_FREEZE_RAW(str);
return str;
}
return fstr;
}
static VALUE
register_fstring(VALUE str, bool copy)
{
struct fstr_update_arg args;
args.copy = copy;
RB_VM_LOCK_ENTER();
{
st_table *frozen_strings = rb_vm_fstring_table();
do {
args.fstr = str;
st_update(frozen_strings, (st_data_t)str, fstr_update_callback, (st_data_t)&args);
} while (args.fstr == Qundef);
}
RB_VM_LOCK_LEAVE();
assert(OBJ_FROZEN(args.fstr));
assert(!FL_TEST_RAW(args.fstr, STR_FAKESTR));
assert(!FL_TEST_RAW(args.fstr, FL_EXIVAR));
assert(RBASIC_CLASS(args.fstr) == rb_cString);
return args.fstr;
}
static VALUE
setup_fake_str(struct RString *fake_str, const char *name, long len, int encidx)
{
fake_str->basic.flags = T_STRING|RSTRING_NOEMBED|STR_NOFREE|STR_FAKESTR;
/* SHARED to be allocated by the callback */
if (!name) {
RUBY_ASSERT_ALWAYS(len == 0);
name = "";
}
ENCODING_SET_INLINED((VALUE)fake_str, encidx);
RBASIC_SET_CLASS_RAW((VALUE)fake_str, rb_cString);
fake_str->as.heap.len = len;
fake_str->as.heap.ptr = (char *)name;
fake_str->as.heap.aux.capa = len;
return (VALUE)fake_str;
}
/*
* set up a fake string which refers a static string literal.
*/
VALUE
rb_setup_fake_str(struct RString *fake_str, const char *name, long len, rb_encoding *enc)
{
return setup_fake_str(fake_str, name, len, rb_enc_to_index(enc));
}
/*
* rb_fstring_new and rb_fstring_cstr family create or lookup a frozen
* shared string which refers a static string literal. `ptr` must
* point a constant string.
*/
MJIT_FUNC_EXPORTED VALUE
rb_fstring_new(const char *ptr, long len)
{
struct RString fake_str;
return register_fstring(setup_fake_str(&fake_str, ptr, len, ENCINDEX_US_ASCII), FALSE);
}
VALUE
rb_fstring_enc_new(const char *ptr, long len, rb_encoding *enc)
{
struct RString fake_str;
return register_fstring(rb_setup_fake_str(&fake_str, ptr, len, enc), FALSE);
}
VALUE
rb_fstring_cstr(const char *ptr)
{
return rb_fstring_new(ptr, strlen(ptr));
}
static int
fstring_set_class_i(st_data_t key, st_data_t val, st_data_t arg)
{
RBASIC_SET_CLASS((VALUE)key, (VALUE)arg);
return ST_CONTINUE;
}
static int
fstring_cmp(VALUE a, VALUE b)
{
long alen, blen;
const char *aptr, *bptr;
RSTRING_GETMEM(a, aptr, alen);
RSTRING_GETMEM(b, bptr, blen);
return (alen != blen ||
ENCODING_GET(a) != ENCODING_GET(b) ||
memcmp(aptr, bptr, alen) != 0);
}
static inline int
single_byte_optimizable(VALUE str)
{
rb_encoding *enc;
/* Conservative. It may be ENC_CODERANGE_UNKNOWN. */
if (ENC_CODERANGE(str) == ENC_CODERANGE_7BIT)
return 1;
enc = STR_ENC_GET(str);
if (rb_enc_mbmaxlen(enc) == 1)
return 1;
/* Conservative. Possibly single byte.
* "\xa1" in Shift_JIS for example. */
return 0;
}
VALUE rb_fs;
static inline const char *
search_nonascii(const char *p, const char *e)
{
const uintptr_t *s, *t;
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
# if SIZEOF_UINTPTR_T == 8
# define NONASCII_MASK UINT64_C(0x8080808080808080)
# elif SIZEOF_UINTPTR_T == 4
# define NONASCII_MASK UINT32_C(0x80808080)
# else
# error "don't know what to do."
# endif
#else
# if SIZEOF_UINTPTR_T == 8
# define NONASCII_MASK ((uintptr_t)0x80808080UL << 32 | (uintptr_t)0x80808080UL)
# elif SIZEOF_UINTPTR_T == 4
# define NONASCII_MASK 0x80808080UL /* or...? */
# else
# error "don't know what to do."
# endif
#endif
if (UNALIGNED_WORD_ACCESS || e - p >= SIZEOF_VOIDP) {
#if !UNALIGNED_WORD_ACCESS
if ((uintptr_t)p % SIZEOF_VOIDP) {
int l = SIZEOF_VOIDP - (uintptr_t)p % SIZEOF_VOIDP;
p += l;
switch (l) {
default: UNREACHABLE;
#if SIZEOF_VOIDP > 4
case 7: if (p[-7]&0x80) return p-7;
case 6: if (p[-6]&0x80) return p-6;
case 5: if (p[-5]&0x80) return p-5;
case 4: if (p[-4]&0x80) return p-4;
#endif
case 3: if (p[-3]&0x80) return p-3;
case 2: if (p[-2]&0x80) return p-2;
case 1: if (p[-1]&0x80) return p-1;
case 0: break;
}
}
#endif
#if defined(HAVE_BUILTIN___BUILTIN_ASSUME_ALIGNED) &&! UNALIGNED_WORD_ACCESS
#define aligned_ptr(value) \
__builtin_assume_aligned((value), sizeof(uintptr_t))
#else
#define aligned_ptr(value) (uintptr_t *)(value)
#endif
s = aligned_ptr(p);
t = (uintptr_t *)(e - (SIZEOF_VOIDP-1));
#undef aligned_ptr
for (;s < t; s++) {
if (*s & NONASCII_MASK) {
#ifdef WORDS_BIGENDIAN
return (const char *)s + (nlz_intptr(*s&NONASCII_MASK)>>3);
#else
return (const char *)s + (ntz_intptr(*s&NONASCII_MASK)>>3);
#endif
}
}
p = (const char *)s;
}
switch (e - p) {
default: UNREACHABLE;
#if SIZEOF_VOIDP > 4
case 7: if (e[-7]&0x80) return e-7;
case 6: if (e[-6]&0x80) return e-6;
case 5: if (e[-5]&0x80) return e-5;
case 4: if (e[-4]&0x80) return e-4;
#endif
case 3: if (e[-3]&0x80) return e-3;
case 2: if (e[-2]&0x80) return e-2;
case 1: if (e[-1]&0x80) return e-1;
case 0: return NULL;
}
}
static int
coderange_scan(const char *p, long len, rb_encoding *enc)
{
const char *e = p + len;
if (rb_enc_to_index(enc) == rb_ascii8bit_encindex()) {
/* enc is ASCII-8BIT. ASCII-8BIT string never be broken. */
p = search_nonascii(p, e);
return p ? ENC_CODERANGE_VALID : ENC_CODERANGE_7BIT;
}
if (rb_enc_asciicompat(enc)) {
p = search_nonascii(p, e);
if (!p) return ENC_CODERANGE_7BIT;
for (;;) {
int ret = rb_enc_precise_mbclen(p, e, enc);
if (!MBCLEN_CHARFOUND_P(ret)) return ENC_CODERANGE_BROKEN;
p += MBCLEN_CHARFOUND_LEN(ret);
if (p == e) break;
p = search_nonascii(p, e);
if (!p) break;
}
}
else {
while (p < e) {
int ret = rb_enc_precise_mbclen(p, e, enc);
if (!MBCLEN_CHARFOUND_P(ret)) return ENC_CODERANGE_BROKEN;
p += MBCLEN_CHARFOUND_LEN(ret);
}
}
return ENC_CODERANGE_VALID;
}
long
rb_str_coderange_scan_restartable(const char *s, const char *e, rb_encoding *enc, int *cr)
{
const char *p = s;
if (*cr == ENC_CODERANGE_BROKEN)
return e - s;
if (rb_enc_to_index(enc) == rb_ascii8bit_encindex()) {
/* enc is ASCII-8BIT. ASCII-8BIT string never be broken. */
if (*cr == ENC_CODERANGE_VALID) return e - s;
p = search_nonascii(p, e);
*cr = p ? ENC_CODERANGE_VALID : ENC_CODERANGE_7BIT;
return e - s;
}
else if (rb_enc_asciicompat(enc)) {
p = search_nonascii(p, e);
if (!p) {
if (*cr != ENC_CODERANGE_VALID) *cr = ENC_CODERANGE_7BIT;
return e - s;
}
for (;;) {
int ret = rb_enc_precise_mbclen(p, e, enc);
if (!MBCLEN_CHARFOUND_P(ret)) {
*cr = MBCLEN_INVALID_P(ret) ? ENC_CODERANGE_BROKEN: ENC_CODERANGE_UNKNOWN;
return p - s;
}
p += MBCLEN_CHARFOUND_LEN(ret);
if (p == e) break;
p = search_nonascii(p, e);
if (!p) break;
}
}
else {
while (p < e) {
int ret = rb_enc_precise_mbclen(p, e, enc);
if (!MBCLEN_CHARFOUND_P(ret)) {
*cr = MBCLEN_INVALID_P(ret) ? ENC_CODERANGE_BROKEN: ENC_CODERANGE_UNKNOWN;
return p - s;
}
p += MBCLEN_CHARFOUND_LEN(ret);
}
}
*cr = ENC_CODERANGE_VALID;
return e - s;
}
static inline void
str_enc_copy(VALUE str1, VALUE str2)
{
rb_enc_set_index(str1, ENCODING_GET(str2));
}
static void
rb_enc_cr_str_copy_for_substr(VALUE dest, VALUE src)
{
/* this function is designed for copying encoding and coderange
* from src to new string "dest" which is made from the part of src.
*/
str_enc_copy(dest, src);
if (RSTRING_LEN(dest) == 0) {
if (!rb_enc_asciicompat(STR_ENC_GET(src)))
ENC_CODERANGE_SET(dest, ENC_CODERANGE_VALID);
else
ENC_CODERANGE_SET(dest, ENC_CODERANGE_7BIT);
return;
}
switch (ENC_CODERANGE(src)) {
case ENC_CODERANGE_7BIT:
ENC_CODERANGE_SET(dest, ENC_CODERANGE_7BIT);
break;
case ENC_CODERANGE_VALID:
if (!rb_enc_asciicompat(STR_ENC_GET(src)) ||
search_nonascii(RSTRING_PTR(dest), RSTRING_END(dest)))
ENC_CODERANGE_SET(dest, ENC_CODERANGE_VALID);
else
ENC_CODERANGE_SET(dest, ENC_CODERANGE_7BIT);
break;
default:
break;
}
}
static void
rb_enc_cr_str_exact_copy(VALUE dest, VALUE src)
{
str_enc_copy(dest, src);
ENC_CODERANGE_SET(dest, ENC_CODERANGE(src));
}
static int
enc_coderange_scan(VALUE str, rb_encoding *enc, int encidx)
{
if (rb_enc_mbminlen(enc) > 1 && rb_enc_dummy_p(enc) &&
rb_enc_mbminlen(enc = get_actual_encoding(encidx, str)) == 1) {
return ENC_CODERANGE_BROKEN;
}
else {
return coderange_scan(RSTRING_PTR(str), RSTRING_LEN(str), enc);
}
}
int
rb_enc_str_coderange_scan(VALUE str, rb_encoding *enc)
{
return enc_coderange_scan(str, enc, rb_enc_to_index(enc));
}
int
rb_enc_str_coderange(VALUE str)
{
int cr = ENC_CODERANGE(str);
if (cr == ENC_CODERANGE_UNKNOWN) {
int encidx = ENCODING_GET(str);
rb_encoding *enc = rb_enc_from_index(encidx);
cr = enc_coderange_scan(str, enc, encidx);
ENC_CODERANGE_SET(str, cr);
}
return cr;
}
int
rb_enc_str_asciionly_p(VALUE str)
{
rb_encoding *enc = STR_ENC_GET(str);
if (!rb_enc_asciicompat(enc))
return FALSE;
else if (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)
return TRUE;
return FALSE;
}
static inline void
str_mod_check(VALUE s, const char *p, long len)
{
if (RSTRING_PTR(s) != p || RSTRING_LEN(s) != len){
rb_raise(rb_eRuntimeError, "string modified");
}
}
static size_t
str_capacity(VALUE str, const int termlen)
{
if (STR_EMBED_P(str)) {
#if USE_RVARGC
return str_embed_capa(str) - termlen;
#else
return (RSTRING_EMBED_LEN_MAX + 1 - termlen);
#endif
}
else if (FL_TEST(str, STR_SHARED|STR_NOFREE)) {
return RSTRING(str)->as.heap.len;
}
else {
return RSTRING(str)->as.heap.aux.capa;
}
}
size_t
rb_str_capacity(VALUE str)
{
return str_capacity(str, TERM_LEN(str));
}
static inline void
must_not_null(const char *ptr)
{
if (!ptr) {
rb_raise(rb_eArgError, "NULL pointer given");
}
}
static inline VALUE
str_alloc(VALUE klass, size_t size)
{
assert(size > 0);
RVARGC_NEWOBJ_OF(str, struct RString, klass,
T_STRING | (RGENGC_WB_PROTECTED_STRING ? FL_WB_PROTECTED : 0), size);
return (VALUE)str;
}
static inline VALUE
str_alloc_embed(VALUE klass, size_t capa)
{
size_t size = str_embed_size(capa);
assert(rb_gc_size_allocatable_p(size));
#if !USE_RVARGC
assert(size <= sizeof(struct RString));
#endif
return str_alloc(klass, size);
}
static inline VALUE
str_alloc_heap(VALUE klass)
{
return str_alloc(klass, sizeof(struct RString));
}
static inline VALUE
empty_str_alloc(VALUE klass)
{
RUBY_DTRACE_CREATE_HOOK(STRING, 0);
VALUE str = str_alloc_embed(klass, 0);
memset(RSTRING(str)->as.embed.ary, 0, str_embed_capa(str));
return str;
}
static VALUE
str_new0(VALUE klass, const char *ptr, long len, int termlen)
{
VALUE str;
if (len < 0) {
rb_raise(rb_eArgError, "negative string size (or size too big)");
}
RUBY_DTRACE_CREATE_HOOK(STRING, len);
if (STR_EMBEDDABLE_P(len, termlen)) {
str = str_alloc_embed(klass, len + termlen);
if (len == 0) {
ENC_CODERANGE_SET(str, ENC_CODERANGE_7BIT);
}
}
else {
str = str_alloc_heap(klass);
RSTRING(str)->as.heap.aux.capa = len;
/* :FIXME: @shyouhei guesses `len + termlen` is guaranteed to never
* integer overflow. If we can STATIC_ASSERT that, the following
* mul_add_mul can be reverted to a simple ALLOC_N. */
RSTRING(str)->as.heap.ptr =
rb_xmalloc_mul_add_mul(sizeof(char), len, sizeof(char), termlen);
STR_SET_NOEMBED(str);
}
if (ptr) {
memcpy(RSTRING_PTR(str), ptr, len);
}
STR_SET_LEN(str, len);
TERM_FILL(RSTRING_PTR(str) + len, termlen);
return str;
}
static VALUE
str_new(VALUE klass, const char *ptr, long len)
{
return str_new0(klass, ptr, len, 1);
}
VALUE
rb_str_new(const char *ptr, long len)
{
return str_new(rb_cString, ptr, len);
}
VALUE
rb_usascii_str_new(const char *ptr, long len)
{
VALUE str = rb_str_new(ptr, len);
ENCODING_CODERANGE_SET(str, rb_usascii_encindex(), ENC_CODERANGE_7BIT);
return str;
}
VALUE
rb_utf8_str_new(const char *ptr, long len)
{
VALUE str = str_new(rb_cString, ptr, len);
rb_enc_associate_index(str, rb_utf8_encindex());
return str;
}
VALUE
rb_enc_str_new(const char *ptr, long len, rb_encoding *enc)
{
VALUE str;
if (!enc) return rb_str_new(ptr, len);
str = str_new0(rb_cString, ptr, len, rb_enc_mbminlen(enc));
rb_enc_associate(str, enc);
return str;
}
VALUE
rb_str_new_cstr(const char *ptr)
{
must_not_null(ptr);
/* rb_str_new_cstr() can take pointer from non-malloc-generated
* memory regions, and that cannot be detected by the MSAN. Just
* trust the programmer that the argument passed here is a sane C
* string. */
__msan_unpoison_string(ptr);
return rb_str_new(ptr, strlen(ptr));
}
VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
VALUE str = rb_str_new_cstr(ptr);
ENCODING_CODERANGE_SET(str, rb_usascii_encindex(), ENC_CODERANGE_7BIT);
return str;
}
VALUE
rb_utf8_str_new_cstr(const char *ptr)
{
VALUE str = rb_str_new_cstr(ptr);
rb_enc_associate_index(str, rb_utf8_encindex());
return str;
}
VALUE
rb_enc_str_new_cstr(const char *ptr, rb_encoding *enc)
{
must_not_null(ptr);
if (rb_enc_mbminlen(enc) != 1) {
rb_raise(rb_eArgError, "wchar encoding given");
}
return rb_enc_str_new(ptr, strlen(ptr), enc);
}
static VALUE
str_new_static(VALUE klass, const char *ptr, long len, int encindex)
{
VALUE str;
if (len < 0) {
rb_raise(rb_eArgError, "negative string size (or size too big)");
}
if (!ptr) {
rb_encoding *enc = rb_enc_get_from_index(encindex);
str = str_new0(klass, ptr, len, rb_enc_mbminlen(enc));
}
else {
RUBY_DTRACE_CREATE_HOOK(STRING, len);
str = str_alloc_heap(klass);
RSTRING(str)->as.heap.len = len;
RSTRING(str)->as.heap.ptr = (char *)ptr;
RSTRING(str)->as.heap.aux.capa = len;
STR_SET_NOEMBED(str);
RBASIC(str)->flags |= STR_NOFREE;
}
rb_enc_associate_index(str, encindex);
return str;
}
VALUE
rb_str_new_static(const char *ptr, long len)
{
return str_new_static(rb_cString, ptr, len, 0);
}
VALUE
rb_usascii_str_new_static(const char *ptr, long len)
{
return str_new_static(rb_cString, ptr, len, ENCINDEX_US_ASCII);
}
VALUE
rb_utf8_str_new_static(const char *ptr, long len)
{
return str_new_static(rb_cString, ptr, len, ENCINDEX_UTF_8);
}
VALUE
rb_enc_str_new_static(const char *ptr, long len, rb_encoding *enc)
{
return str_new_static(rb_cString, ptr, len, rb_enc_to_index(enc));
}
VALUE
rb_tainted_str_new(const char *ptr, long len)
{
rb_warn_deprecated_to_remove_at(3.2, "rb_tainted_str_new", NULL);
return rb_str_new(ptr, len);
}
VALUE
rb_tainted_str_new_cstr(const char *ptr)
{
rb_warn_deprecated_to_remove_at(3.2, "rb_tainted_str_new_cstr", NULL);
return rb_str_new_cstr(ptr);
}
static VALUE str_cat_conv_enc_opts(VALUE newstr, long ofs, const char *ptr, long len,
rb_encoding *from, rb_encoding *to,
int ecflags, VALUE ecopts);
static inline bool
is_enc_ascii_string(VALUE str, rb_encoding *enc)
{
int encidx = rb_enc_to_index(enc);
if (rb_enc_get_index(str) == encidx)
return is_ascii_string(str);
return enc_coderange_scan(str, enc, encidx) == ENC_CODERANGE_7BIT;
}
VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
long len;
const char *ptr;
VALUE newstr;
if (!to) return str;
if (!from) from = rb_enc_get(str);
if (from == to) return str;
if ((rb_enc_asciicompat(to) && is_enc_ascii_string(str, from)) ||
to == rb_ascii8bit_encoding()) {
if (STR_ENC_GET(str) != to) {
str = rb_str_dup(str);
rb_enc_associate(str, to);
}
return str;
}
RSTRING_GETMEM(str, ptr, len);
newstr = str_cat_conv_enc_opts(rb_str_buf_new(len), 0, ptr, len,
from, to, ecflags, ecopts);
if (NIL_P(newstr)) {
/* some error, return original */
return str;
}
return newstr;
}
VALUE
rb_str_cat_conv_enc_opts(VALUE newstr, long ofs, const char *ptr, long len,
rb_encoding *from, int ecflags, VALUE ecopts)
{
long olen;
olen = RSTRING_LEN(newstr);
if (ofs < -olen || olen < ofs)
rb_raise(rb_eIndexError, "index %ld out of string", ofs);
if (ofs < 0) ofs += olen;
if (!from) {
STR_SET_LEN(newstr, ofs);
return rb_str_cat(newstr, ptr, len);
}
rb_str_modify(newstr);
return str_cat_conv_enc_opts(newstr, ofs, ptr, len, from,
rb_enc_get(newstr),
ecflags, ecopts);
}
VALUE
rb_str_initialize(VALUE str, const char *ptr, long len, rb_encoding *enc)
{
STR_SET_LEN(str, 0);
rb_enc_associate(str, enc);
rb_str_cat(str, ptr, len);
return str;
}
static VALUE
str_cat_conv_enc_opts(VALUE newstr, long ofs, const char *ptr, long len,
rb_encoding *from, rb_encoding *to,
int ecflags, VALUE ecopts)
{
rb_econv_t *ec;
rb_econv_result_t ret;
long olen;
VALUE econv_wrapper;
const unsigned char *start, *sp;
unsigned char *dest, *dp;
size_t converted_output = (size_t)ofs;
olen = rb_str_capacity(newstr);
econv_wrapper = rb_obj_alloc(rb_cEncodingConverter);
RBASIC_CLEAR_CLASS(econv_wrapper);
ec = rb_econv_open_opts(from->name, to->name, ecflags, ecopts);
if (!ec) return Qnil;
DATA_PTR(econv_wrapper) = ec;
sp = (unsigned char*)ptr;
start = sp;
while ((dest = (unsigned char*)RSTRING_PTR(newstr)),
(dp = dest + converted_output),
(ret = rb_econv_convert(ec, &sp, start + len, &dp, dest + olen, 0)),
ret == econv_destination_buffer_full) {
/* destination buffer short */
size_t converted_input = sp - start;
size_t rest = len - converted_input;
converted_output = dp - dest;
rb_str_set_len(newstr, converted_output);
if (converted_input && converted_output &&
rest < (LONG_MAX / converted_output)) {
rest = (rest * converted_output) / converted_input;
}
else {
rest = olen;
}
olen += rest < 2 ? 2 : rest;
rb_str_resize(newstr, olen);
}
DATA_PTR(econv_wrapper) = 0;
rb_econv_close(ec);
switch (ret) {
case econv_finished:
len = dp - (unsigned char*)RSTRING_PTR(newstr);
rb_str_set_len(newstr, len);
rb_enc_associate(newstr, to);
return newstr;
default:
return Qnil;
}
}
VALUE
rb_str_conv_enc(VALUE str, rb_encoding *from, rb_encoding *to)
{
return rb_str_conv_enc_opts(str, from, to, 0, Qnil);
}
VALUE
rb_external_str_new_with_enc(const char *ptr, long len, rb_encoding *eenc)
{
rb_encoding *ienc;
VALUE str;
const int eidx = rb_enc_to_index(eenc);
if (!ptr) {
return rb_enc_str_new(ptr, len, eenc);
}
/* ASCII-8BIT case, no conversion */
if ((eidx == rb_ascii8bit_encindex()) ||
(eidx == rb_usascii_encindex() && search_nonascii(ptr, ptr + len))) {
return rb_str_new(ptr, len);
}
/* no default_internal or same encoding, no conversion */
ienc = rb_default_internal_encoding();
if (!ienc || eenc == ienc) {
return rb_enc_str_new(ptr, len, eenc);
}
/* ASCII compatible, and ASCII only string, no conversion in
* default_internal */
if ((eidx == rb_ascii8bit_encindex()) ||
(eidx == rb_usascii_encindex()) ||
(rb_enc_asciicompat(eenc) && !search_nonascii(ptr, ptr + len))) {
return rb_enc_str_new(ptr, len, ienc);
}
/* convert from the given encoding to default_internal */
str = rb_enc_str_new(NULL, 0, ienc);
/* when the conversion failed for some reason, just ignore the
* default_internal and result in the given encoding as-is. */
if (NIL_P(rb_str_cat_conv_enc_opts(str, 0, ptr, len, eenc, 0, Qnil))) {
rb_str_initialize(str, ptr, len, eenc);
}
return str;
}
VALUE
rb_external_str_with_enc(VALUE str, rb_encoding *eenc)
{
int eidx = rb_enc_to_index(eenc);
if (eidx == rb_usascii_encindex() &&
rb_enc_str_coderange(str) != ENC_CODERANGE_7BIT) {
rb_enc_associate_index(str, rb_ascii8bit_encindex());
return str;
}
rb_enc_associate_index(str, eidx);
return rb_str_conv_enc(str, eenc, rb_default_internal_encoding());
}
VALUE
rb_external_str_new(const char *ptr, long len)
{
return rb_external_str_new_with_enc(ptr, len, rb_default_external_encoding());
}
VALUE
rb_external_str_new_cstr(const char *ptr)
{
return rb_external_str_new_with_enc(ptr, strlen(ptr), rb_default_external_encoding());
}
VALUE
rb_locale_str_new(const char *ptr, long len)
{
return rb_external_str_new_with_enc(ptr, len, rb_locale_encoding());
}
VALUE
rb_locale_str_new_cstr(const char *ptr)
{
return rb_external_str_new_with_enc(ptr, strlen(ptr), rb_locale_encoding());
}
VALUE
rb_filesystem_str_new(const char *ptr, long len)
{
return rb_external_str_new_with_enc(ptr, len, rb_filesystem_encoding());
}
VALUE
rb_filesystem_str_new_cstr(const char *ptr)
{
return rb_external_str_new_with_enc(ptr, strlen(ptr), rb_filesystem_encoding());
}
VALUE
rb_str_export(VALUE str)
{
return rb_str_export_to_enc(str, rb_default_external_encoding());
}
VALUE
rb_str_export_locale(VALUE str)
{
return rb_str_export_to_enc(str, rb_locale_encoding());
}
VALUE
rb_str_export_to_enc(VALUE str, rb_encoding *enc)
{
return rb_str_conv_enc(str, STR_ENC_GET(str), enc);
}
static VALUE
str_replace_shared_without_enc(VALUE str2, VALUE str)
{
const int termlen = TERM_LEN(str);
char *ptr;
long len;
RSTRING_GETMEM(str, ptr, len);
if (str_embed_capa(str2) >= len + termlen) {
char *ptr2 = RSTRING(str2)->as.embed.ary;
STR_SET_EMBED(str2);
memcpy(ptr2, RSTRING_PTR(str), len);
STR_SET_EMBED_LEN(str2, len);
TERM_FILL(ptr2+len, termlen);
}
else {
VALUE root;
if (STR_SHARED_P(str)) {
root = RSTRING(str)->as.heap.aux.shared;
RSTRING_GETMEM(str, ptr, len);
}
else {
root = rb_str_new_frozen(str);
RSTRING_GETMEM(root, ptr, len);
}
assert(OBJ_FROZEN(root));
if (!STR_EMBED_P(str2) && !FL_TEST_RAW(str2, STR_SHARED|STR_NOFREE)) {
if (FL_TEST_RAW(str2, STR_SHARED_ROOT)) {
rb_fatal("about to free a possible shared root");
}
char *ptr2 = STR_HEAP_PTR(str2);
if (ptr2 != ptr) {
ruby_sized_xfree(ptr2, STR_HEAP_SIZE(str2));
}
}
FL_SET(str2, STR_NOEMBED);
RSTRING(str2)->as.heap.len = len;
RSTRING(str2)->as.heap.ptr = ptr;
STR_SET_SHARED(str2, root);
}
return str2;
}
static VALUE
str_replace_shared(VALUE str2, VALUE str)
{
str_replace_shared_without_enc(str2, str);
rb_enc_cr_str_exact_copy(str2, str);
return str2;
}
static VALUE
str_new_shared(VALUE klass, VALUE str)
{
return str_replace_shared(str_alloc_heap(klass), str);
}
VALUE
rb_str_new_shared(VALUE str)
{
return str_new_shared(rb_obj_class(str), str);
}
VALUE
rb_str_new_frozen(VALUE orig)
{
if (OBJ_FROZEN(orig)) return orig;
return str_new_frozen(rb_obj_class(orig), orig);
}
static VALUE
rb_str_new_frozen_String(VALUE orig)
{
if (OBJ_FROZEN(orig) && rb_obj_class(orig) == rb_cString) return orig;
return str_new_frozen(rb_cString, orig);
}
VALUE
rb_str_tmp_frozen_acquire(VALUE orig)
{
if (OBJ_FROZEN_RAW(orig)) return orig;
return str_new_frozen_buffer(0, orig, FALSE);
}
void
rb_str_tmp_frozen_release(VALUE orig, VALUE tmp)
{
if (RBASIC_CLASS(tmp) != 0)
return;
if (STR_EMBED_P(tmp)) {
assert(OBJ_FROZEN_RAW(tmp));
}
else if (FL_TEST_RAW(orig, STR_SHARED) &&
!FL_TEST_RAW(orig, STR_TMPLOCK|RUBY_FL_FREEZE)) {
VALUE shared = RSTRING(orig)->as.heap.aux.shared;
if (shared == tmp && !FL_TEST_RAW(tmp, STR_BORROWED)) {
assert(RSTRING(orig)->as.heap.ptr == RSTRING(tmp)->as.heap.ptr);
assert(RSTRING(orig)->as.heap.len == RSTRING(tmp)->as.heap.len);
/* Unshare orig since the root (tmp) only has this one child. */
FL_UNSET_RAW(orig, STR_SHARED);
RSTRING(orig)->as.heap.aux.capa = RSTRING(tmp)->as.heap.aux.capa;
RBASIC(orig)->flags |= RBASIC(tmp)->flags & STR_NOFREE;
assert(OBJ_FROZEN_RAW(tmp));
/* Make tmp embedded and empty so it is safe for sweeping. */
STR_SET_EMBED(tmp);
STR_SET_EMBED_LEN(tmp, 0);
}
}
}
static VALUE
str_new_frozen(VALUE klass, VALUE orig)
{
return str_new_frozen_buffer(klass, orig, TRUE);
}
static VALUE
heap_str_make_shared(VALUE klass, VALUE orig)
{
assert(!STR_EMBED_P(orig));
assert(!STR_SHARED_P(orig));
VALUE str = str_alloc_heap(klass);
STR_SET_NOEMBED(str);
RSTRING(str)->as.heap.len = RSTRING_LEN(orig);
RSTRING(str)->as.heap.ptr = RSTRING_PTR(orig);
RSTRING(str)->as.heap.aux.capa = RSTRING(orig)->as.heap.aux.capa;
RBASIC(str)->flags |= RBASIC(orig)->flags & STR_NOFREE;
RBASIC(orig)->flags &= ~STR_NOFREE;
STR_SET_SHARED(orig, str);
if (klass == 0)
FL_UNSET_RAW(str, STR_BORROWED);
return str;
}
static VALUE
str_new_frozen_buffer(VALUE klass, VALUE orig, int copy_encoding)
{
VALUE str;
long len = RSTRING_LEN(orig);
if (STR_EMBED_P(orig) || STR_EMBEDDABLE_P(len, 1)) {
str = str_new(klass, RSTRING_PTR(orig), len);
assert(STR_EMBED_P(str));
}
else {
if (FL_TEST_RAW(orig, STR_SHARED)) {
VALUE shared = RSTRING(orig)->as.heap.aux.shared;
long ofs = RSTRING(orig)->as.heap.ptr - RSTRING_PTR(shared);
long rest = RSTRING_LEN(shared) - ofs - RSTRING(orig)->as.heap.len;
assert(ofs >= 0);
assert(rest >= 0);
assert(ofs + rest <= RSTRING_LEN(shared));
#if !USE_RVARGC
assert(!STR_EMBED_P(shared));
#endif
assert(OBJ_FROZEN(shared));
if ((ofs > 0) || (rest > 0) ||
(klass != RBASIC(shared)->klass) ||
ENCODING_GET(shared) != ENCODING_GET(orig)) {
str = str_new_shared(klass, shared);
assert(!STR_EMBED_P(str));
RSTRING(str)->as.heap.ptr += ofs;
RSTRING(str)->as.heap.len -= ofs + rest;
}
else {
if (RBASIC_CLASS(shared) == 0)
FL_SET_RAW(shared, STR_BORROWED);
return shared;
}
}
else if (STR_EMBEDDABLE_P(RSTRING_LEN(orig), TERM_LEN(orig))) {
str = str_alloc_embed(klass, RSTRING_LEN(orig) + TERM_LEN(orig));
STR_SET_EMBED(str);
memcpy(RSTRING_PTR(str), RSTRING_PTR(orig), RSTRING_LEN(orig));
STR_SET_EMBED_LEN(str, RSTRING_LEN(orig));
TERM_FILL(RSTRING_END(str), TERM_LEN(orig));
}
else {
str = heap_str_make_shared(klass, orig);
}
}
if (copy_encoding) rb_enc_cr_str_exact_copy(str, orig);
OBJ_FREEZE(str);
return str;
}
VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
return str_new0(rb_obj_class(obj), ptr, len, TERM_LEN(obj));
}
static VALUE
str_new_empty_String(VALUE str)
{
VALUE v = rb_str_new(0, 0);
rb_enc_copy(v, str);
return v;
}
#define STR_BUF_MIN_SIZE 63
#if !USE_RVARGC
STATIC_ASSERT(STR_BUF_MIN_SIZE, STR_BUF_MIN_SIZE > RSTRING_EMBED_LEN_MAX);
#endif
VALUE
rb_str_buf_new(long capa)
{
if (STR_EMBEDDABLE_P(capa, 1)) {
return str_alloc_embed(rb_cString, capa + 1);
}
VALUE str = str_alloc_heap(rb_cString);
#if !USE_RVARGC
if (capa < STR_BUF_MIN_SIZE) {
capa = STR_BUF_MIN_SIZE;
}
#endif
FL_SET(str, STR_NOEMBED);
RSTRING(str)->as.heap.aux.capa = capa;
RSTRING(str)->as.heap.ptr = ALLOC_N(char, (size_t)capa + 1);
RSTRING(str)->as.heap.ptr[0] = '\0';
return str;
}
VALUE
rb_str_buf_new_cstr(const char *ptr)
{
VALUE str;
long len = strlen(ptr);
str = rb_str_buf_new(len);
rb_str_buf_cat(str, ptr, len);
return str;
}
VALUE
rb_str_tmp_new(long len)
{
return str_new(0, 0, len);
}
void
rb_str_free(VALUE str)
{
if (FL_TEST(str, RSTRING_FSTR)) {
st_data_t fstr = (st_data_t)str;
RB_VM_LOCK_ENTER();
{
st_delete(rb_vm_fstring_table(), &fstr, NULL);
RB_DEBUG_COUNTER_INC(obj_str_fstr);
}
RB_VM_LOCK_LEAVE();
}
if (STR_EMBED_P(str)) {
RB_DEBUG_COUNTER_INC(obj_str_embed);
}
else if (FL_TEST(str, STR_SHARED | STR_NOFREE)) {
(void)RB_DEBUG_COUNTER_INC_IF(obj_str_shared, FL_TEST(str, STR_SHARED));
(void)RB_DEBUG_COUNTER_INC_IF(obj_str_shared, FL_TEST(str, STR_NOFREE));
}
else {
RB_DEBUG_COUNTER_INC(obj_str_ptr);
ruby_sized_xfree(STR_HEAP_PTR(str), STR_HEAP_SIZE(str));
}
}
RUBY_FUNC_EXPORTED size_t
rb_str_memsize(VALUE str)
{
if (FL_TEST(str, STR_NOEMBED|STR_SHARED|STR_NOFREE) == STR_NOEMBED) {
return STR_HEAP_SIZE(str);
}
else {
return 0;
}
}
VALUE
rb_str_to_str(VALUE str)
{
return rb_convert_type_with_id(str, T_STRING, "String", idTo_str);
}
static inline void str_discard(VALUE str);
static void str_shared_replace(VALUE str, VALUE str2);
void
rb_str_shared_replace(VALUE str, VALUE str2)
{
if (str != str2) str_shared_replace(str, str2);
}
static void
str_shared_replace(VALUE str, VALUE str2)
{
rb_encoding *enc;
int cr;
int termlen;
RUBY_ASSERT(str2 != str);
enc = STR_ENC_GET(str2);
cr = ENC_CODERANGE(str2);
str_discard(str);
termlen = rb_enc_mbminlen(enc);
if (str_embed_capa(str) >= RSTRING_LEN(str2) + termlen) {
STR_SET_EMBED(str);
memcpy(RSTRING_PTR(str), RSTRING_PTR(str2), (size_t)RSTRING_LEN(str2) + termlen);
STR_SET_EMBED_LEN(str, RSTRING_LEN(str2));
rb_enc_associate(str, enc);
ENC_CODERANGE_SET(str, cr);
}
else {
#if USE_RVARGC
if (STR_EMBED_P(str2)) {
assert(!FL_TEST(str2, STR_SHARED));
long len = RSTRING(str2)->as.embed.len;
assert(len + termlen <= str_embed_capa(str2));
char *new_ptr = ALLOC_N(char, len + termlen);
memcpy(new_ptr, RSTRING(str2)->as.embed.ary, len + termlen);
RSTRING(str2)->as.heap.ptr = new_ptr;
RSTRING(str2)->as.heap.len = len;
RSTRING(str2)->as.heap.aux.capa = len;
STR_SET_NOEMBED(str2);
}
#endif
STR_SET_NOEMBED(str);
FL_UNSET(str, STR_SHARED);
RSTRING(str)->as.heap.ptr = RSTRING_PTR(str2);
RSTRING(str)->as.heap.len = RSTRING_LEN(str2);
if (FL_TEST(str2, STR_SHARED)) {
VALUE shared = RSTRING(str2)->as.heap.aux.shared;
STR_SET_SHARED(str, shared);
}
else {
RSTRING(str)->as.heap.aux.capa = RSTRING(str2)->as.heap.aux.capa;
}
/* abandon str2 */
STR_SET_EMBED(str2);
RSTRING_PTR(str2)[0] = 0;
STR_SET_EMBED_LEN(str2, 0);
rb_enc_associate(str, enc);
ENC_CODERANGE_SET(str, cr);
}
}
VALUE
rb_obj_as_string(VALUE obj)
{
VALUE str;
if (RB_TYPE_P(obj, T_STRING)) {
return obj;
}
str = rb_funcall(obj, idTo_s, 0);
return rb_obj_as_string_result(str, obj);
}
MJIT_FUNC_EXPORTED VALUE
rb_obj_as_string_result(VALUE str, VALUE obj)
{
if (!RB_TYPE_P(str, T_STRING))
return rb_any_to_s(obj);
return str;
}
static VALUE
str_replace(VALUE str, VALUE str2)
{
long len;
len = RSTRING_LEN(str2);
if (STR_SHARED_P(str2)) {
VALUE shared = RSTRING(str2)->as.heap.aux.shared;
assert(OBJ_FROZEN(shared));
STR_SET_NOEMBED(str);
RSTRING(str)->as.heap.len = len;
RSTRING(str)->as.heap.ptr = RSTRING_PTR(str2);
STR_SET_SHARED(str, shared);
rb_enc_cr_str_exact_copy(str, str2);
}
else {
str_replace_shared(str, str2);
}
return str;
}
static inline VALUE
ec_str_alloc(struct rb_execution_context_struct *ec, VALUE klass, size_t size)
{
assert(size > 0);
RB_RVARGC_EC_NEWOBJ_OF(ec, str, struct RString, klass,
T_STRING | (RGENGC_WB_PROTECTED_STRING ? FL_WB_PROTECTED : 0), size);
return (VALUE)str;
}
static inline VALUE
ec_str_alloc_embed(struct rb_execution_context_struct *ec, VALUE klass, size_t capa)
{
size_t size = str_embed_size(capa);
assert(rb_gc_size_allocatable_p(size));
#if !USE_RVARGC
assert(size <= sizeof(struct RString));
#endif
return ec_str_alloc(ec, klass, size);
}
static inline VALUE
ec_str_alloc_heap(struct rb_execution_context_struct *ec, VALUE klass)
{
return ec_str_alloc(ec, klass, sizeof(struct RString));
}
static inline VALUE
str_duplicate_setup(VALUE klass, VALUE str, VALUE dup)
{
const VALUE flag_mask =
#if !USE_RVARGC
RSTRING_NOEMBED | RSTRING_EMBED_LEN_MASK |
#endif
ENC_CODERANGE_MASK | ENCODING_MASK |
FL_FREEZE
;
VALUE flags = FL_TEST_RAW(str, flag_mask);
int encidx = 0;
if (STR_EMBED_P(str)) {
long len = RSTRING_EMBED_LEN(str);
assert(str_embed_capa(dup) >= len + 1);
STR_SET_EMBED_LEN(dup, len);
MEMCPY(RSTRING(dup)->as.embed.ary, RSTRING(str)->as.embed.ary, char, len + 1);
}
else {
VALUE root = str;
if (FL_TEST_RAW(str, STR_SHARED)) {
root = RSTRING(str)->as.heap.aux.shared;
}
else if (UNLIKELY(!(flags & FL_FREEZE))) {
root = str = str_new_frozen(klass, str);
flags = FL_TEST_RAW(str, flag_mask);
}
assert(!STR_SHARED_P(root));
assert(RB_OBJ_FROZEN_RAW(root));
#if USE_RVARGC
if (1) {
#else
if (STR_EMBED_P(root)) {
MEMCPY(RSTRING(dup)->as.embed.ary, RSTRING(root)->as.embed.ary,
char, RSTRING_EMBED_LEN_MAX + 1);
}
else {
#endif
RSTRING(dup)->as.heap.len = RSTRING_LEN(str);
RSTRING(dup)->as.heap.ptr = RSTRING_PTR(str);
RB_OBJ_WRITE(dup, &RSTRING(dup)->as.heap.aux.shared, root);
flags |= RSTRING_NOEMBED | STR_SHARED;
}
}
if ((flags & ENCODING_MASK) == (ENCODING_INLINE_MAX<<ENCODING_SHIFT)) {
encidx = rb_enc_get_index(str);
flags &= ~ENCODING_MASK;
}
FL_SET_RAW(dup, flags & ~FL_FREEZE);
if (encidx) rb_enc_associate_index(dup, encidx);
return dup;
}
static inline VALUE
ec_str_duplicate(struct rb_execution_context_struct *ec, VALUE klass, VALUE str)
{
VALUE dup;
if (!USE_RVARGC || FL_TEST(str, STR_NOEMBED)) {
dup = ec_str_alloc_heap(ec, klass);
}
else {
dup = ec_str_alloc_embed(ec, klass, RSTRING_EMBED_LEN(str) + TERM_LEN(str));
}
return str_duplicate_setup(klass, str, dup);
}
static inline VALUE
str_duplicate(VALUE klass, VALUE str)
{
VALUE dup;
if (!USE_RVARGC || FL_TEST(str, STR_NOEMBED)) {
dup = str_alloc_heap(klass);
}
else {
dup = str_alloc_embed(klass, RSTRING_EMBED_LEN(str) + TERM_LEN(str));
}
return str_duplicate_setup(klass, str, dup);
}
VALUE
rb_str_dup(VALUE str)
{
return str_duplicate(rb_obj_class(str), str);
}
VALUE
rb_str_resurrect(VALUE str)
{
RUBY_DTRACE_CREATE_HOOK(STRING, RSTRING_LEN(str));
return str_duplicate(rb_cString, str);
}
VALUE
rb_ec_str_resurrect(struct rb_execution_context_struct *ec, VALUE str)
{
RUBY_DTRACE_CREATE_HOOK(STRING, RSTRING_LEN(str));
return ec_str_duplicate(ec, rb_cString, str);
}
/*
* call-seq:
* String.new(string = '') -> new_string
* String.new(string = '', encoding: encoding) -> new_string
* String.new(string = '', capacity: size) -> new_string
*
* Returns a new \String that is a copy of +string+.
*
* With no arguments, returns the empty string with the Encoding <tt>ASCII-8BIT</tt>:
* s = String.new
* s # => ""
* s.encoding # => #<Encoding:ASCII-8BIT>
*
* With the single \String argument +string+, returns a copy of +string+
* with the same encoding as +string+:
* s = String.new("Que veut dire \u{e7}a?")
* s # => "Que veut dire \u{e7}a?"
* s.encoding # => #<Encoding:UTF-8>
*
* Literal strings like <tt>""</tt> or here-documents always use
* {script encoding}[Encoding.html#class-Encoding-label-Script+encoding], unlike String.new.
*
* With keyword +encoding+, returns a copy of +str+
* with the specified encoding:
* s = String.new(encoding: 'ASCII')
* s.encoding # => #<Encoding:US-ASCII>
* s = String.new('foo', encoding: 'ASCII')
* s.encoding # => #<Encoding:US-ASCII>
*
* Note that these are equivalent:
* s0 = String.new('foo', encoding: 'ASCII')
* s1 = 'foo'.force_encoding('ASCII')
* s0.encoding == s1.encoding # => true
*
* With keyword +capacity+, returns a copy of +str+;
* the given +capacity+ may set the size of the internal buffer,
* which may affect performance:
* String.new(capacity: 1) # => ""
* String.new(capacity: 4096) # => ""
*
* The +string+, +encoding+, and +capacity+ arguments may all be used together:
*
* String.new('hello', encoding: 'UTF-8', capacity: 25)
*
*/
static VALUE
rb_str_init(int argc, VALUE *argv, VALUE str)
{
static ID keyword_ids[2];
VALUE orig, opt, venc, vcapa;
VALUE kwargs[2];
rb_encoding *enc = 0;
int n;
if (!keyword_ids[0]) {
keyword_ids[0] = rb_id_encoding();
CONST_ID(keyword_ids[1], "capacity");
}
n = rb_scan_args(argc, argv, "01:", &orig, &opt);
if (!NIL_P(opt)) {
rb_get_kwargs(opt, keyword_ids, 0, 2, kwargs);
venc = kwargs[0];
vcapa = kwargs[1];
if (venc != Qundef && !NIL_P(venc)) {
enc = rb_to_encoding(venc);
}
if (vcapa != Qundef && !NIL_P(vcapa)) {
long capa = NUM2LONG(vcapa);
long len = 0;
int termlen = enc ? rb_enc_mbminlen(enc) : 1;
if (capa < STR_BUF_MIN_SIZE) {
capa = STR_BUF_MIN_SIZE;
}
if (n == 1) {
StringValue(orig);
len = RSTRING_LEN(orig);
if (capa < len) {
capa = len;
}
if (orig == str) n = 0;
}
str_modifiable(str);
if (STR_EMBED_P(str)) { /* make noembed always */
char *new_ptr = ALLOC_N(char, (size_t)capa + termlen);
#if USE_RVARGC
assert(RSTRING(str)->as.embed.len + 1 <= str_embed_capa(str));
memcpy(new_ptr, RSTRING(str)->as.embed.ary, RSTRING(str)->as.embed.len + 1);
#else
memcpy(new_ptr, RSTRING(str)->as.embed.ary, RSTRING_EMBED_LEN_MAX + 1);
#endif
RSTRING(str)->as.heap.ptr = new_ptr;
}
else if (FL_TEST(str, STR_SHARED|STR_NOFREE)) {
const size_t size = (size_t)capa + termlen;
const char *const old_ptr = RSTRING_PTR(str);
const size_t osize = RSTRING(str)->as.heap.len + TERM_LEN(str);
char *new_ptr = ALLOC_N(char, (size_t)capa + termlen);
memcpy(new_ptr, old_ptr, osize < size ? osize : size);
FL_UNSET_RAW(str, STR_SHARED|STR_NOFREE);
RSTRING(str)->as.heap.ptr = new_ptr;
}
else if (STR_HEAP_SIZE(str) != (size_t)capa + termlen) {
SIZED_REALLOC_N(RSTRING(str)->as.heap.ptr, char,
(size_t)capa + termlen, STR_HEAP_SIZE(str));
}
RSTRING(str)->as.heap.len = len;
TERM_FILL(&RSTRING(str)->as.heap.ptr[len], termlen);
if (n == 1) {
memcpy(RSTRING(str)->as.heap.ptr, RSTRING_PTR(orig), len);
rb_enc_cr_str_exact_copy(str, orig);
}
FL_SET(str, STR_NOEMBED);
RSTRING(str)->as.heap.aux.capa = capa;
}
else if (n == 1) {
rb_str_replace(str, orig);
}
if (enc) {
rb_enc_associate(str, enc);
ENC_CODERANGE_CLEAR(str);
}
}
else if (n == 1) {
rb_str_replace(str, orig);
}
return str;
}
#ifdef NONASCII_MASK
#define is_utf8_lead_byte(c) (((c)&0xC0) != 0x80)
/*
* UTF-8 leading bytes have either 0xxxxxxx or 11xxxxxx
* bit representation. (see https://en.wikipedia.org/wiki/UTF-8)
* Therefore, the following pseudocode can detect UTF-8 leading bytes.
*
* if (!(byte & 0x80))
* byte |= 0x40; // turn on bit6
* return ((byte>>6) & 1); // bit6 represent whether this byte is leading or not.
*
* This function calculates whether a byte is leading or not for all bytes
* in the argument word by concurrently using the above logic, and then
* adds up the number of leading bytes in the word.
*/
static inline uintptr_t
count_utf8_lead_bytes_with_word(const uintptr_t *s)
{
uintptr_t d = *s;
/* Transform so that bit0 indicates whether we have a UTF-8 leading byte or not. */
d = (d>>6) | (~d>>7);
d &= NONASCII_MASK >> 7;
/* Gather all bytes. */
#if defined(HAVE_BUILTIN___BUILTIN_POPCOUNT) && defined(__POPCNT__)
/* use only if it can use POPCNT */
return rb_popcount_intptr(d);
#else
d += (d>>8);
d += (d>>16);
# if SIZEOF_VOIDP == 8
d += (d>>32);
# endif
return (d&0xF);
#endif
}
#endif
static inline long
enc_strlen(const char *p, const char *e, rb_encoding *enc, int cr)
{
long c;
const char *q;
if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
long diff = (long)(e - p);
return diff / rb_enc_mbminlen(enc) + !!(diff % rb_enc_mbminlen(enc));
}
#ifdef NONASCII_MASK
else if (cr == ENC_CODERANGE_VALID && enc == rb_utf8_encoding()) {
uintptr_t len = 0;
if ((int)sizeof(uintptr_t) * 2 < e - p) {
const uintptr_t *s, *t;
const uintptr_t lowbits = sizeof(uintptr_t) - 1;
s = (const uintptr_t*)(~lowbits & ((uintptr_t)p + lowbits));
t = (const uintptr_t*)(~lowbits & (uintptr_t)e);
while (p < (const char *)s) {
if (is_utf8_lead_byte(*p)) len++;
p++;
}
while (s < t) {
len += count_utf8_lead_bytes_with_word(s);
s++;
}
p = (const char *)s;
}
while (p < e) {
if (is_utf8_lead_byte(*p)) len++;
p++;
}
return (long)len;
}
#endif
else if (rb_enc_asciicompat(enc)) {
c = 0;
if (ENC_CODERANGE_CLEAN_P(cr)) {
while (p < e) {
if (ISASCII(*p)) {
q = search_nonascii(p, e);
if (!q)
return c + (e - p);
c += q - p;
p = q;
}
p += rb_enc_fast_mbclen(p, e, enc);
c++;
}
}
else {
while (p < e) {
if (ISASCII(*p)) {
q = search_nonascii(p, e);
if (!q)
return c + (e - p);
c += q - p;
p = q;
}
p += rb_enc_mbclen(p, e, enc);
c++;
}
}
return c;
}
for (c=0; p<e; c++) {
p += rb_enc_mbclen(p, e, enc);
}
return c;
}
long
rb_enc_strlen(const char *p, const char *e, rb_encoding *enc)
{
return enc_strlen(p, e, enc, ENC_CODERANGE_UNKNOWN);
}
/* To get strlen with cr
* Note that given cr is not used.
*/
long
rb_enc_strlen_cr(const char *p, const char *e, rb_encoding *enc, int *cr)
{
long c;
const char *q;
int ret;
*cr = 0;
if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
long diff = (long)(e - p);
return diff / rb_enc_mbminlen(enc) + !!(diff % rb_enc_mbminlen(enc));
}
else if (rb_enc_asciicompat(enc)) {
c = 0;
while (p < e) {
if (ISASCII(*p)) {
q = search_nonascii(p, e);
if (!q) {
if (!*cr) *cr = ENC_CODERANGE_7BIT;
return c + (e - p);
}
c += q - p;
p = q;
}
ret = rb_enc_precise_mbclen(p, e, enc);
if (MBCLEN_CHARFOUND_P(ret)) {
*cr |= ENC_CODERANGE_VALID;
p += MBCLEN_CHARFOUND_LEN(ret);
}
else {
*cr = ENC_CODERANGE_BROKEN;
p++;
}
c++;
}
if (!*cr) *cr = ENC_CODERANGE_7BIT;
return c;
}
for (c=0; p<e; c++) {
ret = rb_enc_precise_mbclen(p, e, enc);
if (MBCLEN_CHARFOUND_P(ret)) {
*cr |= ENC_CODERANGE_VALID;
p += MBCLEN_CHARFOUND_LEN(ret);
}
else {
*cr = ENC_CODERANGE_BROKEN;
if (p + rb_enc_mbminlen(enc) <= e)
p += rb_enc_mbminlen(enc);
else
p = e;
}
}
if (!*cr) *cr = ENC_CODERANGE_7BIT;
return c;
}
/* enc must be str's enc or rb_enc_check(str, str2) */
static long
str_strlen(VALUE str, rb_encoding *enc)
{
const char *p, *e;
int cr;
if (single_byte_optimizable(str)) return RSTRING_LEN(str);
if (!enc) enc = STR_ENC_GET(str);
p = RSTRING_PTR(str);
e = RSTRING_END(str);
cr = ENC_CODERANGE(str);
if (cr == ENC_CODERANGE_UNKNOWN) {
long n = rb_enc_strlen_cr(p, e, enc, &cr);
if (cr) ENC_CODERANGE_SET(str, cr);
return n;
}
else {
return enc_strlen(p, e, enc, cr);
}
}
long
rb_str_strlen(VALUE str)
{
return str_strlen(str, NULL);
}
/*
* call-seq:
* length -> integer
*
* Returns the count of characters (not bytes) in +self+:
*
* "\x80\u3042".length # => 2
* "hello".length # => 5
*
* String#size is an alias for String#length.
*
* Related: String#bytesize.
*/
VALUE
rb_str_length(VALUE str)
{
return LONG2NUM(str_strlen(str, NULL));
}
/*
* call-seq:
* bytesize -> integer
*
* Returns the count of bytes in +self+:
*
* "\x80\u3042".bytesize # => 4
* "hello".bytesize # => 5
*
* Related: String#length.
*/
static VALUE
rb_str_bytesize(VALUE str)
{
return LONG2NUM(RSTRING_LEN(str));
}
/*
* call-seq:
* empty? -> true or false
*
* Returns +true+ if the length of +self+ is zero, +false+ otherwise:
*
* "hello".empty? # => false
* " ".empty? # => false
* "".empty? # => true
*
*/
static VALUE
rb_str_empty(VALUE str)
{
return RBOOL(RSTRING_LEN(str) == 0);
}
/*
* call-seq:
* string + other_string -> new_string
*
* Returns a new \String containing +other_string+ concatenated to +self+:
*
* "Hello from " + self.to_s # => "Hello from main"
*
*/
VALUE
rb_str_plus(VALUE str1, VALUE str2)
{
VALUE str3;
rb_encoding *enc;
char *ptr1, *ptr2, *ptr3;
long len1, len2;
int termlen;
StringValue(str2);
enc = rb_enc_check_str(str1, str2);
RSTRING_GETMEM(str1, ptr1, len1);
RSTRING_GETMEM(str2, ptr2, len2);
termlen = rb_enc_mbminlen(enc);
if (len1 > LONG_MAX - len2) {
rb_raise(rb_eArgError, "string size too big");
}
str3 = str_new0(rb_cString, 0, len1+len2, termlen);
ptr3 = RSTRING_PTR(str3);
memcpy(ptr3, ptr1, len1);
memcpy(ptr3+len1, ptr2, len2);
TERM_FILL(&ptr3[len1+len2], termlen);
ENCODING_CODERANGE_SET(str3, rb_enc_to_index(enc),
ENC_CODERANGE_AND(ENC_CODERANGE(str1), ENC_CODERANGE(str2)));
RB_GC_GUARD(str1);
RB_GC_GUARD(str2);
return str3;
}
/* A variant of rb_str_plus that does not raise but return Qundef instead. */
MJIT_FUNC_EXPORTED VALUE
rb_str_opt_plus(VALUE str1, VALUE str2)
{
assert(RBASIC_CLASS(str1) == rb_cString);
assert(RBASIC_CLASS(str2) == rb_cString);
long len1, len2;
MAYBE_UNUSED(char) *ptr1, *ptr2;
RSTRING_GETMEM(str1, ptr1, len1);
RSTRING_GETMEM(str2, ptr2, len2);
int enc1 = rb_enc_get_index(str1);
int enc2 = rb_enc_get_index(str2);
if (enc1 < 0) {
return Qundef;
}
else if (enc2 < 0) {
return Qundef;
}
else if (enc1 != enc2) {
return Qundef;
}
else if (len1 > LONG_MAX - len2) {
return Qundef;
}
else {
return rb_str_plus(str1, str2);
}
}
/*
* call-seq:
* string * integer -> new_string
*
* Returns a new \String containing +integer+ copies of +self+:
*
* "Ho! " * 3 # => "Ho! Ho! Ho! "
* "Ho! " * 0 # => ""
*
*/
VALUE
rb_str_times(VALUE str, VALUE times)
{
VALUE str2;
long n, len;
char *ptr2;
int termlen;
if (times == INT2FIX(1)) {
return str_duplicate(rb_cString, str);
}
if (times == INT2FIX(0)) {
str2 = str_alloc_embed(rb_cString, 0);
rb_enc_copy(str2, str);
return str2;
}
len = NUM2LONG(times);
if (len < 0) {
rb_raise(rb_eArgError, "negative argument");
}
if (RSTRING_LEN(str) == 1 && RSTRING_PTR(str)[0] == 0) {
if (STR_EMBEDDABLE_P(len, 1)) {
str2 = str_alloc_embed(rb_cString, len + 1);
memset(RSTRING_PTR(str2), 0, len + 1);
}
else {
str2 = str_alloc_heap(rb_cString);
RSTRING(str2)->as.heap.aux.capa = len;
RSTRING(str2)->as.heap.ptr = ZALLOC_N(char, (size_t)len + 1);
STR_SET_NOEMBED(str2);
}
STR_SET_LEN(str2, len);
rb_enc_copy(str2, str);
return str2;
}
if (len && LONG_MAX/len < RSTRING_LEN(str)) {
rb_raise(rb_eArgError, "argument too big");
}
len *= RSTRING_LEN(str);
termlen = TERM_LEN(str);
str2 = str_new0(rb_cString, 0, len, termlen);
ptr2 = RSTRING_PTR(str2);
if (len) {
n = RSTRING_LEN(str);
memcpy(ptr2, RSTRING_PTR(str), n);
while (n <= len/2) {
memcpy(ptr2 + n, ptr2, n);
n *= 2;
}
memcpy(ptr2 + n, ptr2, len-n);
}
STR_SET_LEN(str2, len);
TERM_FILL(&ptr2[len], termlen);
rb_enc_cr_str_copy_for_substr(str2, str);
return str2;
}
/*
* call-seq:
* string % object -> new_string
*
* Returns the result of formatting +object+ into the format specification +self+
* (see Kernel#sprintf for formatting details):
*
* "%05d" % 123 # => "00123"
*
* If +self+ contains multiple substitutions, +object+ must be
* an \Array or \Hash containing the values to be substituted:
*
* "%-5s: %016x" % [ "ID", self.object_id ] # => "ID : 00002b054ec93168"
* "foo = %{foo}" % {foo: 'bar'} # => "foo = bar"
* "foo = %{foo}, baz = %{baz}" % {foo: 'bar', baz: 'bat'} # => "foo = bar, baz = bat"
*
*/
static VALUE
rb_str_format_m(VALUE str, VALUE arg)
{
VALUE tmp = rb_check_array_type(arg);
if (!NIL_P(tmp)) {
return rb_str_format(RARRAY_LENINT(tmp), RARRAY_CONST_PTR(tmp), str);
}
return rb_str_format(1, &arg, str);
}
static inline void
rb_check_lockedtmp(VALUE str)
{
if (FL_TEST(str, STR_TMPLOCK)) {
rb_raise(rb_eRuntimeError, "can't modify string; temporarily locked");
}
}
static inline void
str_modifiable(VALUE str)
{
rb_check_lockedtmp(str);
rb_check_frozen(str);
}
static inline int
str_dependent_p(VALUE str)
{
if (STR_EMBED_P(str) || !FL_TEST(str, STR_SHARED|STR_NOFREE)) {
return 0;
}
else {
return 1;
}
}
static inline int
str_independent(VALUE str)
{
str_modifiable(str);
return !str_dependent_p(str);
}
static void
str_make_independent_expand(VALUE str, long len, long expand, const int termlen)
{
char *ptr;
char *oldptr;
long capa = len + expand;
if (len > capa) len = capa;
if (!STR_EMBED_P(str) && str_embed_capa(str) >= capa + termlen) {
ptr = RSTRING(str)->as.heap.ptr;
STR_SET_EMBED(str);
memcpy(RSTRING(str)->as.embed.ary, ptr, len);
TERM_FILL(RSTRING(str)->as.embed.ary + len, termlen);
STR_SET_EMBED_LEN(str, len);
return;
}
ptr = ALLOC_N(char, (size_t)capa + termlen);
oldptr = RSTRING_PTR(str);
if (oldptr) {
memcpy(ptr, oldptr, len);
}
if (FL_TEST_RAW(str, STR_NOEMBED|STR_NOFREE|STR_SHARED) == STR_NOEMBED) {
xfree(oldptr);
}
STR_SET_NOEMBED(str);
FL_UNSET(str, STR_SHARED|STR_NOFREE);
TERM_FILL(ptr + len, termlen);
RSTRING(str)->as.heap.ptr = ptr;
RSTRING(str)->as.heap.len = len;
RSTRING(str)->as.heap.aux.capa = capa;
}
void
rb_str_modify(VALUE str)
{
if (!str_independent(str))
str_make_independent(str);
ENC_CODERANGE_CLEAR(str);
}
void
rb_str_modify_expand(VALUE str, long expand)
{
int termlen = TERM_LEN(str);
long len = RSTRING_LEN(str);
if (expand < 0) {
rb_raise(rb_eArgError, "negative expanding string size");
}
if (expand >= LONG_MAX - len) {
rb_raise(rb_eArgError, "string size too big");
}
if (!str_independent(str)) {
str_make_independent_expand(str, len, expand, termlen);
}
else if (expand > 0) {
RESIZE_CAPA_TERM(str, len + expand, termlen);
}
ENC_CODERANGE_CLEAR(str);
}
/* As rb_str_modify(), but don't clear coderange */
static void
str_modify_keep_cr(VALUE str)
{
if (!str_independent(str))
str_make_independent(str);
if (ENC_CODERANGE(str) == ENC_CODERANGE_BROKEN)
/* Force re-scan later */
ENC_CODERANGE_CLEAR(str);
}
static inline void
str_discard(VALUE str)
{
str_modifiable(str);
if (!STR_EMBED_P(str) && !FL_TEST(str, STR_SHARED|STR_NOFREE)) {
ruby_sized_xfree(STR_HEAP_PTR(str), STR_HEAP_SIZE(str));
RSTRING(str)->as.heap.ptr = 0;
RSTRING(str)->as.heap.len = 0;
}
}
void
rb_must_asciicompat(VALUE str)
{
rb_encoding *enc = rb_enc_get(str);
if (!rb_enc_asciicompat(enc)) {
rb_raise(rb_eEncCompatError, "ASCII incompatible encoding: %s", rb_enc_name(enc));
}
}
VALUE
rb_string_value(volatile VALUE *ptr)
{
VALUE s = *ptr;
if (!RB_TYPE_P(s, T_STRING)) {
s = rb_str_to_str(s);
*ptr = s;
}
return s;
}
char *
rb_string_value_ptr(volatile VALUE *ptr)
{
VALUE str = rb_string_value(ptr);
return RSTRING_PTR(str);
}
static int
zero_filled(const char *s, int n)
{
for (; n > 0; --n) {
if (*s++) return 0;
}
return 1;
}
static const char *
str_null_char(const char *s, long len, const int minlen, rb_encoding *enc)
{
const char *e = s + len;
for (; s + minlen <= e; s += rb_enc_mbclen(s, e, enc)) {
if (zero_filled(s, minlen)) return s;
}
return 0;
}
static char *
str_fill_term(VALUE str, char *s, long len, int termlen)
{
/* This function assumes that (capa + termlen) bytes of memory
* is allocated, like many other functions in this file.
*/
if (str_dependent_p(str)) {
if (!zero_filled(s + len, termlen))
str_make_independent_expand(str, len, 0L, termlen);
}
else {
TERM_FILL(s + len, termlen);
return s;
}
return RSTRING_PTR(str);
}
void
rb_str_change_terminator_length(VALUE str, const int oldtermlen, const int termlen)
{
long capa = str_capacity(str, oldtermlen) + oldtermlen;
long len = RSTRING_LEN(str);
assert(capa >= len);
if (capa - len < termlen) {
rb_check_lockedtmp(str);
str_make_independent_expand(str, len, 0L, termlen);
}
else if (str_dependent_p(str)) {
if (termlen > oldtermlen)
str_make_independent_expand(str, len, 0L, termlen);
}
else {
if (!STR_EMBED_P(str)) {
/* modify capa instead of realloc */
assert(!FL_TEST((str), STR_SHARED));
RSTRING(str)->as.heap.aux.capa = capa - termlen;
}
if (termlen > oldtermlen) {
TERM_FILL(RSTRING_PTR(str) + len, termlen);
}
}
return;
}
static char *
str_null_check(VALUE str, int *w)
{
char *s = RSTRING_PTR(str);
long len = RSTRING_LEN(str);
rb_encoding *enc = rb_enc_get(str);
const int minlen = rb_enc_mbminlen(enc);
if (minlen > 1) {
*w = 1;
if (str_null_char(s, len, minlen, enc)) {
return NULL;
}
return str_fill_term(str, s, len, minlen);
}
*w = 0;
if (!s || memchr(s, 0, len)) {
return NULL;
}
if (s[len]) {
s = str_fill_term(str, s, len, minlen);
}
return s;
}
char *
rb_str_to_cstr(VALUE str)
{
int w;
return str_null_check(str, &w);
}
char *
rb_string_value_cstr(volatile VALUE *ptr)
{
VALUE str = rb_string_value(ptr);
int w;
char *s = str_null_check(str, &w);
if (!s) {
if (w) {
rb_raise(rb_eArgError, "string contains null char");
}
rb_raise(rb_eArgError, "string contains null byte");
}
return s;
}
char *
rb_str_fill_terminator(VALUE str, const int newminlen)
{
char *s = RSTRING_PTR(str);
long len = RSTRING_LEN(str);
return str_fill_term(str, s, len, newminlen);
}
VALUE
rb_check_string_type(VALUE str)
{
str = rb_check_convert_type_with_id(str, T_STRING, "String", idTo_str);
return str;
}
/*
* call-seq:
* String.try_convert(object) -> object, new_string, or nil
*
* If +object+ is a \String object, returns +object+.
*
* Otherwise if +object+ responds to <tt>:to_str</tt>,
* calls <tt>object.to_str</tt> and returns the result.
*
* Returns +nil+ if +object+ does not respond to <tt>:to_str</tt>.
*
* Raises an exception unless <tt>object.to_str</tt> returns a \String object.
*/
static VALUE
rb_str_s_try_convert(VALUE dummy, VALUE str)
{
return rb_check_string_type(str);
}
static char*
str_nth_len(const char *p, const char *e, long *nthp, rb_encoding *enc)
{
long nth = *nthp;
if (rb_enc_mbmaxlen(enc) == 1) {
p += nth;
}
else if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
p += nth * rb_enc_mbmaxlen(enc);
}
else if (rb_enc_asciicompat(enc)) {
const char *p2, *e2;
int n;
while (p < e && 0 < nth) {
e2 = p + nth;
if (e < e2) {
*nthp = nth;
return (char *)e;
}
if (ISASCII(*p)) {
p2 = search_nonascii(p, e2);
if (!p2) {
nth -= e2 - p;
*nthp = nth;
return (char *)e2;
}
nth -= p2 - p;
p = p2;
}
n = rb_enc_mbclen(p, e, enc);
p += n;
nth--;
}
*nthp = nth;
if (nth != 0) {
return (char *)e;
}
return (char *)p;
}
else {
while (p < e && nth--) {
p += rb_enc_mbclen(p, e, enc);
}
}
if (p > e) p = e;
*nthp = nth;
return (char*)p;
}
char*
rb_enc_nth(const char *p, const char *e, long nth, rb_encoding *enc)
{
return str_nth_len(p, e, &nth, enc);
}
static char*
str_nth(const char *p, const char *e, long nth, rb_encoding *enc, int singlebyte)
{
if (singlebyte)
p += nth;
else {
p = str_nth_len(p, e, &nth, enc);
}
if (!p) return 0;
if (p > e) p = e;
return (char *)p;
}
/* char offset to byte offset */
static long
str_offset(const char *p, const char *e, long nth, rb_encoding *enc, int singlebyte)
{
const char *pp = str_nth(p, e, nth, enc, singlebyte);
if (!pp) return e - p;
return pp - p;
}
long
rb_str_offset(VALUE str, long pos)
{
return str_offset(RSTRING_PTR(str), RSTRING_END(str), pos,
STR_ENC_GET(str), single_byte_optimizable(str));
}
#ifdef NONASCII_MASK
static char *
str_utf8_nth(const char *p, const char *e, long *nthp)
{
long nth = *nthp;
if ((int)SIZEOF_VOIDP * 2 < e - p && (int)SIZEOF_VOIDP * 2 < nth) {
const uintptr_t *s, *t;
const uintptr_t lowbits = SIZEOF_VOIDP - 1;
s = (const uintptr_t*)(~lowbits & ((uintptr_t)p + lowbits));
t = (const uintptr_t*)(~lowbits & (uintptr_t)e);
while (p < (const char *)s) {
if (is_utf8_lead_byte(*p)) nth--;
p++;
}
do {
nth -= count_utf8_lead_bytes_with_word(s);
s++;
} while (s < t && (int)SIZEOF_VOIDP <= nth);
p = (char *)s;
}
while (p < e) {
if (is_utf8_lead_byte(*p)) {
if (nth == 0) break;
nth--;
}
p++;
}
*nthp = nth;
return (char *)p;
}
static long
str_utf8_offset(const char *p, const char *e, long nth)
{
const char *pp = str_utf8_nth(p, e, &nth);
return pp - p;
}
#endif
/* byte offset to char offset */
long
rb_str_sublen(VALUE str, long pos)
{
if (single_byte_optimizable(str) || pos < 0)
return pos;
else {
char *p = RSTRING_PTR(str);
return enc_strlen(p, p + pos, STR_ENC_GET(str), ENC_CODERANGE(str));
}
}
VALUE
rb_str_subseq(VALUE str, long beg, long len)
{
VALUE str2;
if (!STR_EMBEDDABLE_P(len, TERM_LEN(str)) &&
SHARABLE_SUBSTRING_P(beg, len, RSTRING_LEN(str))) {
long olen;
str2 = rb_str_new_shared(rb_str_new_frozen_String(str));
RSTRING(str2)->as.heap.ptr += beg;
olen = RSTRING(str2)->as.heap.len;
if (olen > len) RSTRING(str2)->as.heap.len = len;
}
else {
str2 = rb_str_new(RSTRING_PTR(str)+beg, len);
RB_GC_GUARD(str);
}
rb_enc_cr_str_copy_for_substr(str2, str);
return str2;
}
char *
rb_str_subpos(VALUE str, long beg, long *lenp)
{
long len = *lenp;
long slen = -1L;
long blen = RSTRING_LEN(str);
rb_encoding *enc = STR_ENC_GET(str);
char *p, *s = RSTRING_PTR(str), *e = s + blen;
if (len < 0) return 0;
if (!blen) {
len = 0;
}
if (single_byte_optimizable(str)) {
if (beg > blen) return 0;
if (beg < 0) {
beg += blen;
if (beg < 0) return 0;
}
if (len > blen - beg)
len = blen - beg;
if (len < 0) return 0;
p = s + beg;
goto end;
}
if (beg < 0) {
if (len > -beg) len = -beg;
if (-beg * rb_enc_mbmaxlen(enc) < RSTRING_LEN(str) / 8) {
beg = -beg;
while (beg-- > len && (e = rb_enc_prev_char(s, e, e, enc)) != 0);
p = e;
if (!p) return 0;
while (len-- > 0 && (p = rb_enc_prev_char(s, p, e, enc)) != 0);
if (!p) return 0;
len = e - p;
goto end;
}
else {
slen = str_strlen(str, enc);
beg += slen;
if (beg < 0) return 0;
p = s + beg;
if (len == 0) goto end;
}
}
else if (beg > 0 && beg > RSTRING_LEN(str)) {
return 0;
}
if (len == 0) {
if (beg > str_strlen(str, enc)) return 0; /* str's enc */
p = s + beg;
}
#ifdef NONASCII_MASK
else if (ENC_CODERANGE(str) == ENC_CODERANGE_VALID &&
enc == rb_utf8_encoding()) {
p = str_utf8_nth(s, e, &beg);
if (beg > 0) return 0;
len = str_utf8_offset(p, e, len);
}
#endif
else if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
int char_sz = rb_enc_mbmaxlen(enc);
p = s + beg * char_sz;
if (p > e) {
return 0;
}
else if (len * char_sz > e - p)
len = e - p;
else
len *= char_sz;
}
else if ((p = str_nth_len(s, e, &beg, enc)) == e) {
if (beg > 0) return 0;
len = 0;
}
else {
len = str_offset(p, e, len, enc, 0);
}
end:
*lenp = len;
RB_GC_GUARD(str);
return p;
}
static VALUE str_substr(VALUE str, long beg, long len, int empty);
VALUE
rb_str_substr(VALUE str, long beg, long len)
{
return str_substr(str, beg, len, TRUE);
}
static VALUE
str_substr(VALUE str, long beg, long len, int empty)
{
VALUE str2;
char *p = rb_str_subpos(str, beg, &len);
if (!p) return Qnil;
if (!STR_EMBEDDABLE_P(len, TERM_LEN(str)) &&
SHARABLE_SUBSTRING_P(p, len, RSTRING_END(str))) {
long ofs = p - RSTRING_PTR(str);
str2 = rb_str_new_frozen(str);
str2 = str_new_shared(rb_cString, str2);
RSTRING(str2)->as.heap.ptr += ofs;
RSTRING(str2)->as.heap.len = len;
ENC_CODERANGE_CLEAR(str2);
}
else {
if (!len && !empty) return Qnil;
str2 = rb_str_new(p, len);
RB_GC_GUARD(str);
}
rb_enc_cr_str_copy_for_substr(str2, str);
return str2;
}
VALUE
rb_str_freeze(VALUE str)
{
if (OBJ_FROZEN(str)) return str;
rb_str_resize(str, RSTRING_LEN(str));
return rb_obj_freeze(str);
}
/*
* call-seq:
* +string -> new_string or self
*
* Returns +self+ if +self+ is not frozen.
*
* Otherwise. returns <tt>self.dup</tt>, which is not frozen.
*/
static VALUE
str_uplus(VALUE str)
{
if (OBJ_FROZEN(str)) {
return rb_str_dup(str);
}
else {
return str;
}
}
/*
* call-seq:
* -string -> frozen_string
*
* Returns a frozen, possibly pre-existing copy of the string.
*
* The returned \String will be deduplicated as long as it does not have
* any instance variables set on it.
*/
static VALUE
str_uminus(VALUE str)
{
if (!BARE_STRING_P(str) && !rb_obj_frozen_p(str)) {
str = rb_str_dup(str);
}
return rb_fstring(str);
}
RUBY_ALIAS_FUNCTION(rb_str_dup_frozen(VALUE str), rb_str_new_frozen, (str))
#define rb_str_dup_frozen rb_str_new_frozen
VALUE
rb_str_locktmp(VALUE str)
{
if (FL_TEST(str, STR_TMPLOCK)) {
rb_raise(rb_eRuntimeError, "temporal locking already locked string");
}
FL_SET(str, STR_TMPLOCK);
return str;
}
VALUE
rb_str_unlocktmp(VALUE str)
{
if (!FL_TEST(str, STR_TMPLOCK)) {
rb_raise(rb_eRuntimeError, "temporal unlocking already unlocked string");
}
FL_UNSET(str, STR_TMPLOCK);
return str;
}
RUBY_FUNC_EXPORTED VALUE
rb_str_locktmp_ensure(VALUE str, VALUE (*func)(VALUE), VALUE arg)
{
rb_str_locktmp(str);
return rb_ensure(func, arg, rb_str_unlocktmp, str);
}
void
rb_str_set_len(VALUE str, long len)
{
long capa;
const int termlen = TERM_LEN(str);
str_modifiable(str);
if (STR_SHARED_P(str)) {
rb_raise(rb_eRuntimeError, "can't set length of shared string");
}
if (len > (capa = (long)str_capacity(str, termlen)) || len < 0) {
rb_bug("probable buffer overflow: %ld for %ld", len, capa);
}
STR_SET_LEN(str, len);
TERM_FILL(&RSTRING_PTR(str)[len], termlen);
}
VALUE
rb_str_resize(VALUE str, long len)
{
long slen;
int independent;
if (len < 0) {
rb_raise(rb_eArgError, "negative string size (or size too big)");
}
independent = str_independent(str);
ENC_CODERANGE_CLEAR(str);
slen = RSTRING_LEN(str);
{
long capa;
const int termlen = TERM_LEN(str);
if (STR_EMBED_P(str)) {
if (len == slen) return str;
if (str_embed_capa(str) >= len + termlen) {
STR_SET_EMBED_LEN(str, len);
TERM_FILL(RSTRING(str)->as.embed.ary + len, termlen);
return str;
}
str_make_independent_expand(str, slen, len - slen, termlen);
}
else if (str_embed_capa(str) >= len + termlen) {
char *ptr = STR_HEAP_PTR(str);
STR_SET_EMBED(str);
if (slen > len) slen = len;
if (slen > 0) MEMCPY(RSTRING(str)->as.embed.ary, ptr, char, slen);
TERM_FILL(RSTRING(str)->as.embed.ary + len, termlen);
STR_SET_EMBED_LEN(str, len);
if (independent) ruby_xfree(ptr);
return str;
}
else if (!independent) {
if (len == slen) return str;
str_make_independent_expand(str, slen, len - slen, termlen);
}
else if ((capa = RSTRING(str)->as.heap.aux.capa) < len ||
(capa - len) > (len < 1024 ? len : 1024)) {
SIZED_REALLOC_N(RSTRING(str)->as.heap.ptr, char,
(size_t)len + termlen, STR_HEAP_SIZE(str));
RSTRING(str)->as.heap.aux.capa = len;
}
else if (len == slen) return str;
RSTRING(str)->as.heap.len = len;
TERM_FILL(RSTRING(str)->as.heap.ptr + len, termlen); /* sentinel */
}
return str;
}
static VALUE
str_buf_cat(VALUE str, const char *ptr, long len)
{
long capa, total, olen, off = -1;
char *sptr;
const int termlen = TERM_LEN(str);
#if !USE_RVARGC
assert(termlen < RSTRING_EMBED_LEN_MAX + 1); /* < (LONG_MAX/2) */
#endif
RSTRING_GETMEM(str, sptr, olen);
if (ptr >= sptr && ptr <= sptr + olen) {
off = ptr - sptr;
}
rb_str_modify(str);
if (len == 0) return 0;
if (STR_EMBED_P(str)) {
capa = str_embed_capa(str) - termlen;
sptr = RSTRING(str)->as.embed.ary;
olen = RSTRING_EMBED_LEN(str);
}
else {
capa = RSTRING(str)->as.heap.aux.capa;
sptr = RSTRING(str)->as.heap.ptr;
olen = RSTRING(str)->as.heap.len;
}
if (olen > LONG_MAX - len) {
rb_raise(rb_eArgError, "string sizes too big");
}
total = olen + len;
if (capa < total) {
if (total >= LONG_MAX / 2) {
capa = total;
}
while (total > capa) {
capa = 2 * capa + termlen; /* == 2*(capa+termlen)-termlen */
}
RESIZE_CAPA_TERM(str, capa, termlen);
sptr = RSTRING_PTR(str);
}
if (off != -1) {
ptr = sptr + off;
}
memcpy(sptr + olen, ptr, len);
STR_SET_LEN(str, total);
TERM_FILL(sptr + total, termlen); /* sentinel */
return str;
}
#define str_buf_cat2(str, ptr) str_buf_cat((str), (ptr), strlen(ptr))
VALUE
rb_str_cat(VALUE str, const char *ptr, long len)
{
if (len == 0) return str;
if (len < 0) {
rb_raise(rb_eArgError, "negative string size (or size too big)");
}
return str_buf_cat(str, ptr, len);
}
VALUE
rb_str_cat_cstr(VALUE str, const char *ptr)
{
must_not_null(ptr);
return rb_str_buf_cat(str, ptr, strlen(ptr));
}
RUBY_ALIAS_FUNCTION(rb_str_buf_cat(VALUE str, const char *ptr, long len), rb_str_cat, (str, ptr, len))
RUBY_ALIAS_FUNCTION(rb_str_buf_cat2(VALUE str, const char *ptr), rb_str_cat_cstr, (str, ptr))
RUBY_ALIAS_FUNCTION(rb_str_cat2(VALUE str, const char *ptr), rb_str_cat_cstr, (str, ptr))
static VALUE
rb_enc_cr_str_buf_cat(VALUE str, const char *ptr, long len,
int ptr_encindex, int ptr_cr, int *ptr_cr_ret)
{
int str_encindex = ENCODING_GET(str);
int res_encindex;
int str_cr, res_cr;
rb_encoding *str_enc, *ptr_enc;
str_cr = RSTRING_LEN(str) ? ENC_CODERANGE(str) : ENC_CODERANGE_7BIT;
if (str_encindex == ptr_encindex) {
if (str_cr != ENC_CODERANGE_UNKNOWN && ptr_cr == ENC_CODERANGE_UNKNOWN) {
ptr_cr = coderange_scan(ptr, len, rb_enc_from_index(ptr_encindex));
}
}
else {
str_enc = rb_enc_from_index(str_encindex);
ptr_enc = rb_enc_from_index(ptr_encindex);
if (!rb_enc_asciicompat(str_enc) || !rb_enc_asciicompat(ptr_enc)) {
if (len == 0)
return str;
if (RSTRING_LEN(str) == 0) {
rb_str_buf_cat(str, ptr, len);
ENCODING_CODERANGE_SET(str, ptr_encindex, ptr_cr);
return str;
}
goto incompatible;
}
if (ptr_cr == ENC_CODERANGE_UNKNOWN) {
ptr_cr = coderange_scan(ptr, len, ptr_enc);
}
if (str_cr == ENC_CODERANGE_UNKNOWN) {
if (ENCODING_IS_ASCII8BIT(str) || ptr_cr != ENC_CODERANGE_7BIT) {
str_cr = rb_enc_str_coderange(str);
}
}
}
if (ptr_cr_ret)
*ptr_cr_ret = ptr_cr;
if (str_encindex != ptr_encindex &&
str_cr != ENC_CODERANGE_7BIT &&
ptr_cr != ENC_CODERANGE_7BIT) {
str_enc = rb_enc_from_index(str_encindex);
ptr_enc = rb_enc_from_index(ptr_encindex);
goto incompatible;
}
if (str_cr == ENC_CODERANGE_UNKNOWN) {
res_encindex = str_encindex;
res_cr = ENC_CODERANGE_UNKNOWN;
}
else if (str_cr == ENC_CODERANGE_7BIT) {
if (ptr_cr == ENC_CODERANGE_7BIT) {
res_encindex = str_encindex;
res_cr = ENC_CODERANGE_7BIT;
}
else {
res_encindex = ptr_encindex;
res_cr = ptr_cr;
}
}
else if (str_cr == ENC_CODERANGE_VALID) {
res_encindex = str_encindex;
if (ENC_CODERANGE_CLEAN_P(ptr_cr))
res_cr = str_cr;
else
res_cr = ptr_cr;
}
else { /* str_cr == ENC_CODERANGE_BROKEN */
res_encindex = str_encindex;
res_cr = str_cr;
if (0 < len) res_cr = ENC_CODERANGE_UNKNOWN;
}
if (len < 0) {
rb_raise(rb_eArgError, "negative string size (or size too big)");
}
str_buf_cat(str, ptr, len);
ENCODING_CODERANGE_SET(str, res_encindex, res_cr);
return str;
incompatible:
rb_raise(rb_eEncCompatError, "incompatible character encodings: %s and %s",
rb_enc_name(str_enc), rb_enc_name(ptr_enc));
UNREACHABLE_RETURN(Qundef);
}
VALUE
rb_enc_str_buf_cat(VALUE str, const char *ptr, long len, rb_encoding *ptr_enc)
{
return rb_enc_cr_str_buf_cat(str, ptr, len,
rb_enc_to_index(ptr_enc), ENC_CODERANGE_UNKNOWN, NULL);
}
VALUE
rb_str_buf_cat_ascii(VALUE str, const char *ptr)
{
/* ptr must reference NUL terminated ASCII string. */
int encindex = ENCODING_GET(str);
rb_encoding *enc = rb_enc_from_index(encindex);
if (rb_enc_asciicompat(enc)) {
return rb_enc_cr_str_buf_cat(str, ptr, strlen(ptr),
encindex, ENC_CODERANGE_7BIT, 0);
}
else {
char *buf = ALLOCA_N(char, rb_enc_mbmaxlen(enc));
while (*ptr) {
unsigned int c = (unsigned char)*ptr;
int len = rb_enc_codelen(c, enc);
rb_enc_mbcput(c, buf, enc);
rb_enc_cr_str_buf_cat(str, buf, len,
encindex, ENC_CODERANGE_VALID, 0);
ptr++;
}
return str;
}
}
VALUE
rb_str_buf_append(VALUE str, VALUE str2)
{
int str2_cr;
str2_cr = ENC_CODERANGE(str2);
rb_enc_cr_str_buf_cat(str, RSTRING_PTR(str2), RSTRING_LEN(str2),
ENCODING_GET(str2), str2_cr, &str2_cr);
ENC_CODERANGE_SET(str2, str2_cr);
return str;
}
VALUE
rb_str_append(VALUE str, VALUE str2)
{
StringValue(str2);
return rb_str_buf_append(str, str2);
}
#define MIN_PRE_ALLOC_SIZE 48
MJIT_FUNC_EXPORTED VALUE
rb_str_concat_literals(size_t num, const VALUE *strary)
{
VALUE str;
size_t i, s;
long len = 1;
if (UNLIKELY(!num)) return rb_str_new(0, 0);
if (UNLIKELY(num == 1)) return rb_str_resurrect(strary[0]);
for (i = 0; i < num; ++i) { len += RSTRING_LEN(strary[i]); }
if (LIKELY(len < MIN_PRE_ALLOC_SIZE)) {
str = rb_str_resurrect(strary[0]);
s = 1;
}
else {
str = rb_str_buf_new(len);
rb_enc_copy(str, strary[0]);
s = 0;
}
for (i = s; i < num; ++i) {
const VALUE v = strary[i];
int encidx = ENCODING_GET(v);
rb_enc_cr_str_buf_cat(str, RSTRING_PTR(v), RSTRING_LEN(v),
encidx, ENC_CODERANGE(v), NULL);
if (encidx != ENCINDEX_US_ASCII) {
if (ENCODING_GET_INLINED(str) == ENCINDEX_US_ASCII)
rb_enc_set_index(str, encidx);
}
}
return str;
}
/*
* call-seq:
* concat(*objects) -> string
*
* Concatenates each object in +objects+ to +self+ and returns +self+:
*
* s = 'foo'
* s.concat('bar', 'baz') # => "foobarbaz"
* s # => "foobarbaz"
*
* For each given object +object+ that is an \Integer,
* the value is considered a codepoint and converted to a character before concatenation:
*
* s = 'foo'
* s.concat(32, 'bar', 32, 'baz') # => "foo bar baz"
*
* Related: String#<<, which takes a single argument.
*/
static VALUE
rb_str_concat_multi(int argc, VALUE *argv, VALUE str)
{
str_modifiable(str);
if (argc == 1) {
return rb_str_concat(str, argv[0]);
}
else if (argc > 1) {
int i;
VALUE arg_str = rb_str_tmp_new(0);
rb_enc_copy(arg_str, str);
for (i = 0; i < argc; i++) {
rb_str_concat(arg_str, argv[i]);
}
rb_str_buf_append(str, arg_str);
}
return str;
}
/*
* call-seq:
* string << object -> string
*
* Concatenates +object+ to +self+ and returns +self+:
*
* s = 'foo'
* s << 'bar' # => "foobar"
* s # => "foobar"
*
* If +object+ is an \Integer,
* the value is considered a codepoint and converted to a character before concatenation:
*
* s = 'foo'
* s << 33 # => "foo!"
*
* Related: String#concat, which takes multiple arguments.
*/
VALUE
rb_str_concat(VALUE str1, VALUE str2)
{
unsigned int code;
rb_encoding *enc = STR_ENC_GET(str1);
int encidx;
if (RB_INTEGER_TYPE_P(str2)) {
if (rb_num_to_uint(str2, &code) == 0) {
}
else if (FIXNUM_P(str2)) {
rb_raise(rb_eRangeError, "%ld out of char range", FIX2LONG(str2));
}
else {
rb_raise(rb_eRangeError, "bignum out of char range");
}
}
else {
return rb_str_append(str1, str2);
}
encidx = rb_enc_to_index(enc);
if (encidx == ENCINDEX_ASCII || encidx == ENCINDEX_US_ASCII) {
/* US-ASCII automatically extended to ASCII-8BIT */
char buf[1];
buf[0] = (char)code;
if (code > 0xFF) {
rb_raise(rb_eRangeError, "%u out of char range", code);
}
rb_str_cat(str1, buf, 1);
if (encidx == ENCINDEX_US_ASCII && code > 127) {
rb_enc_associate_index(str1, ENCINDEX_ASCII);
ENC_CODERANGE_SET(str1, ENC_CODERANGE_VALID);
}
}
else {
long pos = RSTRING_LEN(str1);
int cr = ENC_CODERANGE(str1);
int len;
char *buf;
switch (len = rb_enc_codelen(code, enc)) {
case ONIGERR_INVALID_CODE_POINT_VALUE:
rb_raise(rb_eRangeError, "invalid codepoint 0x%X in %s", code, rb_enc_name(enc));
break;
case ONIGERR_TOO_BIG_WIDE_CHAR_VALUE:
case 0:
rb_raise(rb_eRangeError, "%u out of char range", code);
break;
}
buf = ALLOCA_N(char, len + 1);
rb_enc_mbcput(code, buf, enc);
if (rb_enc_precise_mbclen(buf, buf + len + 1, enc) != len) {
rb_raise(rb_eRangeError, "invalid codepoint 0x%X in %s", code, rb_enc_name(enc));
}
rb_str_resize(str1, pos+len);
memcpy(RSTRING_PTR(str1) + pos, buf, len);
if (cr == ENC_CODERANGE_7BIT && code > 127)
cr = ENC_CODERANGE_VALID;
ENC_CODERANGE_SET(str1, cr);
}
return str1;
}
/*
* call-seq:
* prepend(*other_strings) -> string
*
* Prepends each string in +other_strings+ to +self+ and returns +self+:
*
* s = 'foo'
* s.prepend('bar', 'baz') # => "barbazfoo"
* s # => "barbazfoo"
*
* Related: String#concat.
*/
static VALUE
rb_str_prepend_multi(int argc, VALUE *argv, VALUE str)
{
str_modifiable(str);
if (argc == 1) {
rb_str_update(str, 0L, 0L, argv[0]);
}
else if (argc > 1) {
int i;
VALUE arg_str = rb_str_tmp_new(0);
rb_enc_copy(arg_str, str);
for (i = 0; i < argc; i++) {
rb_str_append(arg_str, argv[i]);
}
rb_str_update(str, 0L, 0L, arg_str);
}
return str;
}
st_index_t
rb_str_hash(VALUE str)
{
int e = ENCODING_GET(str);
if (e && rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT) {
e = 0;
}
return rb_memhash((const void *)RSTRING_PTR(str), RSTRING_LEN(str)) ^ e;
}
int
rb_str_hash_cmp(VALUE str1, VALUE str2)
{
long len1, len2;
const char *ptr1, *ptr2;
RSTRING_GETMEM(str1, ptr1, len1);
RSTRING_GETMEM(str2, ptr2, len2);
return (len1 != len2 ||
!rb_str_comparable(str1, str2) ||
memcmp(ptr1, ptr2, len1) != 0);
}
/*
* call-seq:
* hash -> integer
*
* Returns the integer hash value for +self+.
* The value is based on the length, content and encoding of +self+.
*
* Related: Object#hash.
*/
static VALUE
rb_str_hash_m(VALUE str)
{
st_index_t hval = rb_str_hash(str);
return ST2FIX(hval);
}
#define lesser(a,b) (((a)>(b))?(b):(a))
int
rb_str_comparable(VALUE str1, VALUE str2)
{
int idx1, idx2;
int rc1, rc2;
if (RSTRING_LEN(str1) == 0) return TRUE;
if (RSTRING_LEN(str2) == 0) return TRUE;
idx1 = ENCODING_GET(str1);
idx2 = ENCODING_GET(str2);
if (idx1 == idx2) return TRUE;
rc1 = rb_enc_str_coderange(str1);
rc2 = rb_enc_str_coderange(str2);
if (rc1 == ENC_CODERANGE_7BIT) {
if (rc2 == ENC_CODERANGE_7BIT) return TRUE;
if (rb_enc_asciicompat(rb_enc_from_index(idx2)))
return TRUE;
}
if (rc2 == ENC_CODERANGE_7BIT) {
if (rb_enc_asciicompat(rb_enc_from_index(idx1)))
return TRUE;
}
return FALSE;
}
int
rb_str_cmp(VALUE str1, VALUE str2)
{
long len1, len2;
const char *ptr1, *ptr2;
int retval;
if (str1 == str2) return 0;
RSTRING_GETMEM(str1, ptr1, len1);
RSTRING_GETMEM(str2, ptr2, len2);
if (ptr1 == ptr2 || (retval = memcmp(ptr1, ptr2, lesser(len1, len2))) == 0) {
if (len1 == len2) {
if (!rb_str_comparable(str1, str2)) {
if (ENCODING_GET(str1) > ENCODING_GET(str2))
return 1;
return -1;
}
return 0;
}
if (len1 > len2) return 1;
return -1;
}
if (retval > 0) return 1;
return -1;
}
/*
* call-seq:
* string == object -> true or false
* string === object -> true or false
*
* Returns +true+ if +object+ has the same length and content;
* as +self+; +false+ otherwise:
*
* s = 'foo'
* s == 'foo' # => true
* s == 'food' # => false
* s == 'FOO' # => false
*
* Returns +false+ if the two strings' encodings are not compatible:
* "\u{e4 f6 fc}".encode("ISO-8859-1") == ("\u{c4 d6 dc}") # => false
*
* If +object+ is not an instance of \String but responds to +to_str+, then the
* two strings are compared using <code>object.==</code>.
*/
VALUE
rb_str_equal(VALUE str1, VALUE str2)
{
if (str1 == str2) return Qtrue;
if (!RB_TYPE_P(str2, T_STRING)) {
if (!rb_respond_to(str2, idTo_str)) {
return Qfalse;
}
return rb_equal(str2, str1);
}
return rb_str_eql_internal(str1, str2);
}
/*
* call-seq:
* eql?(object) -> true or false
*
* Returns +true+ if +object+ has the same length and content;
* as +self+; +false+ otherwise:
*
* s = 'foo'
* s.eql?('foo') # => true
* s.eql?('food') # => false
* s.eql?('FOO') # => false
*
* Returns +false+ if the two strings' encodings are not compatible:
*
* "\u{e4 f6 fc}".encode("ISO-8859-1").eql?("\u{c4 d6 dc}") # => false
*
*/
MJIT_FUNC_EXPORTED VALUE
rb_str_eql(VALUE str1, VALUE str2)
{
if (str1 == str2) return Qtrue;
if (!RB_TYPE_P(str2, T_STRING)) return Qfalse;
return rb_str_eql_internal(str1, str2);
}
/*
* call-seq:
* string <=> other_string -> -1, 0, 1, or nil
*
* Compares +self+ and +other_string+, returning:
*
* - -1 if +other_string+ is larger.
* - 0 if the two are equal.
* - 1 if +other_string+ is smaller.
* - +nil+ if the two are incomparable.
*
* Examples:
*
* 'foo' <=> 'foo' # => 0
* 'foo' <=> 'food' # => -1
* 'food' <=> 'foo' # => 1
* 'FOO' <=> 'foo' # => -1
* 'foo' <=> 'FOO' # => 1
* 'foo' <=> 1 # => nil
*
*/
static VALUE
rb_str_cmp_m(VALUE str1, VALUE str2)
{
int result;
VALUE s = rb_check_string_type(str2);
if (NIL_P(s)) {
return rb_invcmp(str1, str2);
}
result = rb_str_cmp(str1, s);
return INT2FIX(result);
}
static VALUE str_casecmp(VALUE str1, VALUE str2);
static VALUE str_casecmp_p(VALUE str1, VALUE str2);
/*
* call-seq:
* casecmp(other_string) -> -1, 0, 1, or nil
*
* Compares <tt>self.downcase</tt> and <tt>other_string.downcase</tt>; returns:
*
* - -1 if <tt>other_string.downcase</tt> is larger.
* - 0 if the two are equal.
* - 1 if <tt>other_string.downcase</tt> is smaller.
* - +nil+ if the two are incomparable.
*
* Examples:
*
* 'foo'.casecmp('foo') # => 0
* 'foo'.casecmp('food') # => -1
* 'food'.casecmp('foo') # => 1
* 'FOO'.casecmp('foo') # => 0
* 'foo'.casecmp('FOO') # => 0
* 'foo'.casecmp(1) # => nil
*
* See {Case Mapping}[doc/case_mapping_rdoc.html].
*
* Related: String#casecmp?.
*
*/
static VALUE
rb_str_casecmp(VALUE str1, VALUE str2)
{
VALUE s = rb_check_string_type(str2);
if (NIL_P(s)) {
return Qnil;
}
return str_casecmp(str1, s);
}
static VALUE
str_casecmp(VALUE str1, VALUE str2)
{
long len;
rb_encoding *enc;
const char *p1, *p1end, *p2, *p2end;
enc = rb_enc_compatible(str1, str2);
if (!enc) {
return Qnil;
}
p1 = RSTRING_PTR(str1); p1end = RSTRING_END(str1);
p2 = RSTRING_PTR(str2); p2end = RSTRING_END(str2);
if (single_byte_optimizable(str1) && single_byte_optimizable(str2)) {
while (p1 < p1end && p2 < p2end) {
if (*p1 != *p2) {
unsigned int c1 = TOLOWER(*p1 & 0xff);
unsigned int c2 = TOLOWER(*p2 & 0xff);
if (c1 != c2)
return INT2FIX(c1 < c2 ? -1 : 1);
}
p1++;
p2++;
}
}
else {
while (p1 < p1end && p2 < p2end) {
int l1, c1 = rb_enc_ascget(p1, p1end, &l1, enc);
int l2, c2 = rb_enc_ascget(p2, p2end, &l2, enc);
if (0 <= c1 && 0 <= c2) {
c1 = TOLOWER(c1);
c2 = TOLOWER(c2);
if (c1 != c2)
return INT2FIX(c1 < c2 ? -1 : 1);
}
else {
int r;
l1 = rb_enc_mbclen(p1, p1end, enc);
l2 = rb_enc_mbclen(p2, p2end, enc);
len = l1 < l2 ? l1 : l2;
r = memcmp(p1, p2, len);
if (r != 0)
return INT2FIX(r < 0 ? -1 : 1);
if (l1 != l2)
return INT2FIX(l1 < l2 ? -1 : 1);
}
p1 += l1;
p2 += l2;
}
}
if (RSTRING_LEN(str1) == RSTRING_LEN(str2)) return INT2FIX(0);
if (RSTRING_LEN(str1) > RSTRING_LEN(str2)) return INT2FIX(1);
return INT2FIX(-1);
}
/*
* call-seq:
* casecmp?(other_string) -> true, false, or nil
*
* Returns +true+ if +self+ and +other_string+ are equal after
* Unicode case folding, otherwise +false+:
*
* 'foo'.casecmp?('foo') # => true
* 'foo'.casecmp?('food') # => false
* 'food'.casecmp?('foo') # => false
* 'FOO'.casecmp?('foo') # => true
* 'foo'.casecmp?('FOO') # => true
*
* Returns +nil+ if the two values are incomparable:
*
* 'foo'.casecmp?(1) # => nil
*
* See {Case Mapping}[doc/case_mapping_rdoc.html].
*
* Related: String#casecmp.
*
*/
static VALUE
rb_str_casecmp_p(VALUE str1, VALUE str2)
{
VALUE s = rb_check_string_type(str2);
if (NIL_P(s)) {
return Qnil;
}
return str_casecmp_p(str1, s);
}
static VALUE
str_casecmp_p(VALUE str1, VALUE str2)
{
rb_encoding *enc;
VALUE folded_str1, folded_str2;
VALUE fold_opt = sym_fold;
enc = rb_enc_compatible(str1, str2);
if (!enc) {
return Qnil;
}
folded_str1 = rb_str_downcase(1, &fold_opt, str1);
folded_str2 = rb_str_downcase(1, &fold_opt, str2);
return rb_str_eql(folded_str1, folded_str2);
}
static long
strseq_core(const char *str_ptr, const char *str_ptr_end, long str_len,
const char *sub_ptr, long sub_len, long offset, rb_encoding *enc)
{
const char *search_start = str_ptr;
long pos, search_len = str_len - offset;
for (;;) {
const char *t;
pos = rb_memsearch(sub_ptr, sub_len, search_start, search_len, enc);
if (pos < 0) return pos;
t = rb_enc_right_char_head(search_start, search_start+pos, str_ptr_end, enc);
if (t == search_start + pos) break;
search_len -= t - search_start;
if (search_len <= 0) return -1;
offset += t - search_start;
search_start = t;
}
return pos + offset;
}
#define rb_str_index(str, sub, offset) rb_strseq_index(str, sub, offset, 0)
static long
rb_strseq_index(VALUE str, VALUE sub, long offset, int in_byte)
{
const char *str_ptr, *str_ptr_end, *sub_ptr;
long str_len, sub_len;
rb_encoding *enc;
enc = rb_enc_check(str, sub);
if (is_broken_string(sub)) return -1;
str_ptr = RSTRING_PTR(str);
str_ptr_end = RSTRING_END(str);
str_len = RSTRING_LEN(str);
sub_ptr = RSTRING_PTR(sub);
sub_len = RSTRING_LEN(sub);
if (str_len < sub_len) return -1;
if (offset != 0) {
long str_len_char, sub_len_char;
int single_byte = single_byte_optimizable(str);
str_len_char = (in_byte || single_byte) ? str_len : str_strlen(str, enc);
sub_len_char = in_byte ? sub_len : str_strlen(sub, enc);
if (offset < 0) {
offset += str_len_char;
if (offset < 0) return -1;
}
if (str_len_char - offset < sub_len_char) return -1;
if (!in_byte) offset = str_offset(str_ptr, str_ptr_end, offset, enc, single_byte);
str_ptr += offset;
}
if (sub_len == 0) return offset;
/* need proceed one character at a time */
return strseq_core(str_ptr, str_ptr_end, str_len, sub_ptr, sub_len, offset, enc);
}
/*
* call-seq:
* index(substring, offset = 0) -> integer or nil
* index(regexp, offset = 0) -> integer or nil
*
* Returns the \Integer index of the first occurrence of the given +substring+,
* or +nil+ if none found:
*
* 'foo'.index('f') # => 0
* 'foo'.index('o') # => 1
* 'foo'.index('oo') # => 1
* 'foo'.index('ooo') # => nil
*
* Returns the \Integer index of the first match for the given \Regexp +regexp+,
* or +nil+ if none found:
*
* 'foo'.index(/f/) # => 0
* 'foo'.index(/o/) # => 1
* 'foo'.index(/oo/) # => 1
* 'foo'.index(/ooo/) # => nil
*
* \Integer argument +offset+, if given, specifies the position in the
* string to begin the search:
*
* 'foo'.index('o', 1) # => 1
* 'foo'.index('o', 2) # => 2
* 'foo'.index('o', 3) # => nil
*
* If +offset+ is negative, counts backward from the end of +self+:
*
* 'foo'.index('o', -1) # => 2
* 'foo'.index('o', -2) # => 1
* 'foo'.index('o', -3) # => 1
* 'foo'.index('o', -4) # => nil
*
* Related: String#rindex.
*/
static VALUE
rb_str_index_m(int argc, VALUE *argv, VALUE str)
{
VALUE sub;
VALUE initpos;
long pos;
if (rb_scan_args(argc, argv, "11", &sub, &initpos) == 2) {
pos = NUM2LONG(initpos);
}
else {
pos = 0;
}
if (pos < 0) {
pos += str_strlen(str, NULL);
if (pos < 0) {
if (RB_TYPE_P(sub, T_REGEXP)) {
rb_backref_set(Qnil);
}
return Qnil;
}
}
if (RB_TYPE_P(sub, T_REGEXP)) {
if (pos > str_strlen(str, NULL))
return Qnil;
pos = str_offset(RSTRING_PTR(str), RSTRING_END(str), pos,
rb_enc_check(str, sub), single_byte_optimizable(str));
if (rb_reg_search(sub, str, pos, 0) < 0) {
return Qnil;
}
else {
VALUE match = rb_backref_get();
struct re_registers *regs = RMATCH_REGS(match);
pos = rb_str_sublen(str, BEG(0));
return LONG2NUM(pos);
}
}
else {
StringValue(sub);
pos = rb_str_index(str, sub, pos);
pos = rb_str_sublen(str, pos);
}
if (pos == -1) return Qnil;
return LONG2NUM(pos);
}
#ifdef HAVE_MEMRCHR
static long
str_rindex(VALUE str, VALUE sub, const char *s, long pos, rb_encoding *enc)
{
char *hit, *adjusted;
int c;
long slen, searchlen;
char *sbeg, *e, *t;
slen = RSTRING_LEN(sub);
if (slen == 0) return pos;
sbeg = RSTRING_PTR(str);
e = RSTRING_END(str);
t = RSTRING_PTR(sub);
c = *t & 0xff;
searchlen = s - sbeg + 1;
do {
hit = memrchr(sbeg, c, searchlen);
if (!hit) break;
adjusted = rb_enc_left_char_head(sbeg, hit, e, enc);
if (hit != adjusted) {
searchlen = adjusted - sbeg;
continue;
}
if (memcmp(hit, t, slen) == 0)
return rb_str_sublen(str, hit - sbeg);
searchlen = adjusted - sbeg;
} while (searchlen > 0);
return -1;
}
#else
static long
str_rindex(VALUE str, VALUE sub, const char *s, long pos, rb_encoding *enc)
{
long slen;
char *sbeg, *e, *t;
sbeg = RSTRING_PTR(str);
e = RSTRING_END(str);
t = RSTRING_PTR(sub);
slen = RSTRING_LEN(sub);
while (s) {
if (memcmp(s, t, slen) == 0) {
return pos;
}
if (pos == 0) break;
pos--;
s = rb_enc_prev_char(sbeg, s, e, enc);
}
return -1;
}
#endif
static long
rb_str_rindex(VALUE str, VALUE sub, long pos)
{
long len, slen;
char *sbeg, *s;
rb_encoding *enc;
int singlebyte;
enc = rb_enc_check(str, sub);
if (is_broken_string(sub)) return -1;
singlebyte = single_byte_optimizable(str);
len = singlebyte ? RSTRING_LEN(str) : str_strlen(str, enc); /* rb_enc_check */
slen = str_strlen(sub, enc); /* rb_enc_check */
/* substring longer than string */
if (len < slen) return -1;
if (len - pos < slen) pos = len - slen;
if (len == 0) return pos;
sbeg = RSTRING_PTR(str);
if (pos == 0) {
if (memcmp(sbeg, RSTRING_PTR(sub), RSTRING_LEN(sub)) == 0)
return 0;
else
return -1;
}
s = str_nth(sbeg, RSTRING_END(str), pos, enc, singlebyte);
return str_rindex(str, sub, s, pos, enc);
}
/*
* call-seq:
* rindex(substring, offset = self.length) -> integer or nil
* rindex(regexp, offset = self.length) -> integer or nil
*
* Returns the \Integer index of the _last_ occurrence of the given +substring+,
* or +nil+ if none found:
*
* 'foo'.rindex('f') # => 0
* 'foo'.rindex('o') # => 2
* 'foo'.rindex('oo') # => 1
* 'foo'.rindex('ooo') # => nil
*
* Returns the \Integer index of the _last_ match for the given \Regexp +regexp+,
* or +nil+ if none found:
*
* 'foo'.rindex(/f/) # => 0
* 'foo'.rindex(/o/) # => 2
* 'foo'.rindex(/oo/) # => 1
* 'foo'.rindex(/ooo/) # => nil
*
* \Integer argument +offset+, if given and non-negative, specifies the maximum starting position in the
* string to _end_ the search:
*
* 'foo'.rindex('o', 0) # => nil
* 'foo'.rindex('o', 1) # => 1
* 'foo'.rindex('o', 2) # => 2
* 'foo'.rindex('o', 3) # => 2
*
* If +offset+ is a negative \Integer, the maximum starting position in the
* string to _end_ the search is the sum of the string's length and +offset+:
*
* 'foo'.rindex('o', -1) # => 2
* 'foo'.rindex('o', -2) # => 1
* 'foo'.rindex('o', -3) # => nil
* 'foo'.rindex('o', -4) # => nil
*
* Related: String#index.
*/
static VALUE
rb_str_rindex_m(int argc, VALUE *argv, VALUE str)
{
VALUE sub;
VALUE vpos;
rb_encoding *enc = STR_ENC_GET(str);
long pos, len = str_strlen(str, enc); /* str's enc */
if (rb_scan_args(argc, argv, "11", &sub, &vpos) == 2) {
pos = NUM2LONG(vpos);
if (pos < 0) {
pos += len;
if (pos < 0) {
if (RB_TYPE_P(sub, T_REGEXP)) {
rb_backref_set(Qnil);
}
return Qnil;
}
}
if (pos > len) pos = len;
}
else {
pos = len;
}
if (RB_TYPE_P(sub, T_REGEXP)) {
/* enc = rb_get_check(str, sub); */
pos = str_offset(RSTRING_PTR(str), RSTRING_END(str), pos,
enc, single_byte_optimizable(str));
if (rb_reg_search(sub, str, pos, 1) >= 0) {
VALUE match = rb_backref_get();
struct re_registers *regs = RMATCH_REGS(match);
pos = rb_str_sublen(str, BEG(0));
return LONG2NUM(pos);
}
}
else {
StringValue(sub);
pos = rb_str_rindex(str, sub, pos);
if (pos >= 0) return LONG2NUM(pos);
}
return Qnil;
}
/*
* call-seq:
* string =~ regexp -> integer or nil
* string =~ object -> integer or nil
*
* Returns the \Integer index of the first substring that matches
* the given +regexp+, or +nil+ if no match found:
*
* 'foo' =~ /f/ # => 0
* 'foo' =~ /o/ # => 1
* 'foo' =~ /x/ # => nil
*
* Note: also updates
* {Regexp-related global variables}[Regexp.html#class-Regexp-label-Special+global+variables].
*
* If the given +object+ is not a \Regexp, returns the value
* returned by <tt>object =~ self</tt>.
*
* Note that <tt>string =~ regexp</tt> is different from <tt>regexp =~ string</tt>
* (see {Regexp#=~}[https://ruby-doc.org/core-2.7.1/Regexp.html#method-i-3D-7E]):
*
* number= nil
* "no. 9" =~ /(?<number>\d+)/
* number # => nil (not assigned)
* /(?<number>\d+)/ =~ "no. 9"
* number #=> "9"
*
*/
static VALUE
rb_str_match(VALUE x, VALUE y)
{
switch (OBJ_BUILTIN_TYPE(y)) {
case T_STRING:
rb_raise(rb_eTypeError, "type mismatch: String given");
case T_REGEXP:
return rb_reg_match(y, x);
default:
return rb_funcall(y, idEqTilde, 1, x);
}
}
static VALUE get_pat(VALUE);
/*
* call-seq:
* match(pattern, offset = 0) -> matchdata or nil
* match(pattern, offset = 0) {|matchdata| ... } -> object
*
* Returns a \Matchdata object (or +nil+) based on +self+ and the given +pattern+.
*
* Note: also updates
* {Regexp-related global variables}[Regexp.html#class-Regexp-label-Special+global+variables].
*
* - Computes +regexp+ by converting +pattern+ (if not already a \Regexp).
* regexp = Regexp.new(pattern)
* - Computes +matchdata+, which will be either a \MatchData object or +nil+
* (see Regexp#match):
* matchdata = <tt>regexp.match(self)
*
* With no block given, returns the computed +matchdata+:
*
* 'foo'.match('f') # => #<MatchData "f">
* 'foo'.match('o') # => #<MatchData "o">
* 'foo'.match('x') # => nil
*
* If \Integer argument +offset+ is given, the search begins at index +offset+:
*
* 'foo'.match('f', 1) # => nil
* 'foo'.match('o', 1) # => #<MatchData "o">
*
* With a block given, calls the block with the computed +matchdata+
* and returns the block's return value:
*
* 'foo'.match(/o/) {|matchdata| matchdata } # => #<MatchData "o">
* 'foo'.match(/x/) {|matchdata| matchdata } # => nil
* 'foo'.match(/f/, 1) {|matchdata| matchdata } # => nil
*
*/
static VALUE
rb_str_match_m(int argc, VALUE *argv, VALUE str)
{
VALUE re, result;
if (argc < 1)
rb_check_arity(argc, 1, 2);
re = argv[0];
argv[0] = str;
result = rb_funcallv(get_pat(re), rb_intern("match"), argc, argv);
if (!NIL_P(result) && rb_block_given_p()) {
return rb_yield(result);
}
return result;
}
/*
* call-seq:
* match?(pattern, offset = 0) -> true or false
*
* Returns +true+ or +false+ based on whether a match is found for +self+ and +pattern+.
*
* Note: does not update
* {Regexp-related global variables}[Regexp.html#class-Regexp-label-Special+global+variables].
*
* Computes +regexp+ by converting +pattern+ (if not already a \Regexp).
* regexp = Regexp.new(pattern)
*
* Returns +true+ if <tt>self+.match(regexp)</tt> returns a \Matchdata object,
* +false+ otherwise:
*
* 'foo'.match?(/o/) # => true
* 'foo'.match?('o') # => true
* 'foo'.match?(/x/) # => false
*
* If \Integer argument +offset+ is given, the search begins at index +offset+:
* 'foo'.match?('f', 1) # => false
* 'foo'.match?('o', 1) # => true
*
*/
static VALUE
rb_str_match_m_p(int argc, VALUE *argv, VALUE str)
{
VALUE re;
rb_check_arity(argc, 1, 2);
re = get_pat(argv[0]);
return rb_reg_match_p(re, str, argc > 1 ? NUM2LONG(argv[1]) : 0);
}
enum neighbor_char {
NEIGHBOR_NOT_CHAR,
NEIGHBOR_FOUND,
NEIGHBOR_WRAPPED
};
static enum neighbor_char
enc_succ_char(char *p, long len, rb_encoding *enc)
{
long i;
int l;
if (rb_enc_mbminlen(enc) > 1) {
/* wchar, trivial case */
int r = rb_enc_precise_mbclen(p, p + len, enc), c;
if (!MBCLEN_CHARFOUND_P(r)) {
return NEIGHBOR_NOT_CHAR;
}
c = rb_enc_mbc_to_codepoint(p, p + len, enc) + 1;
l = rb_enc_code_to_mbclen(c, enc);
if (!l) return NEIGHBOR_NOT_CHAR;
if (l != len) return NEIGHBOR_WRAPPED;
rb_enc_mbcput(c, p, enc);
r = rb_enc_precise_mbclen(p, p + len, enc);
if (!MBCLEN_CHARFOUND_P(r)) {
return NEIGHBOR_NOT_CHAR;
}
return NEIGHBOR_FOUND;
}
while (1) {
for (i = len-1; 0 <= i && (unsigned char)p[i] == 0xff; i--)
p[i] = '\0';
if (i < 0)
return NEIGHBOR_WRAPPED;
++((unsigned char*)p)[i];
l = rb_enc_precise_mbclen(p, p+len, enc);
if (MBCLEN_CHARFOUND_P(l)) {
l = MBCLEN_CHARFOUND_LEN(l);
if (l == len) {
return NEIGHBOR_FOUND;
}
else {
memset(p+l, 0xff, len-l);
}
}
if (MBCLEN_INVALID_P(l) && i < len-1) {
long len2;
int l2;
for (len2 = len-1; 0 < len2; len2--) {
l2 = rb_enc_precise_mbclen(p, p+len2, enc);
if (!MBCLEN_INVALID_P(l2))
break;
}
memset(p+len2+1, 0xff, len-(len2+1));
}
}
}
static enum neighbor_char
enc_pred_char(char *p, long len, rb_encoding *enc)
{
long i;
int l;
if (rb_enc_mbminlen(enc) > 1) {
/* wchar, trivial case */
int r = rb_enc_precise_mbclen(p, p + len, enc), c;
if (!MBCLEN_CHARFOUND_P(r)) {
return NEIGHBOR_NOT_CHAR;
}
c = rb_enc_mbc_to_codepoint(p, p + len, enc);
if (!c) return NEIGHBOR_NOT_CHAR;
--c;
l = rb_enc_code_to_mbclen(c, enc);
if (!l) return NEIGHBOR_NOT_CHAR;
if (l != len) return NEIGHBOR_WRAPPED;
rb_enc_mbcput(c, p, enc);
r = rb_enc_precise_mbclen(p, p + len, enc);
if (!MBCLEN_CHARFOUND_P(r)) {
return NEIGHBOR_NOT_CHAR;
}
return NEIGHBOR_FOUND;
}
while (1) {
for (i = len-1; 0 <= i && (unsigned char)p[i] == 0; i--)
p[i] = '\xff';
if (i < 0)
return NEIGHBOR_WRAPPED;
--((unsigned char*)p)[i];
l = rb_enc_precise_mbclen(p, p+len, enc);
if (MBCLEN_CHARFOUND_P(l)) {
l = MBCLEN_CHARFOUND_LEN(l);
if (l == len) {
return NEIGHBOR_FOUND;
}
else {
memset(p+l, 0, len-l);
}
}
if (MBCLEN_INVALID_P(l) && i < len-1) {
long len2;
int l2;
for (len2 = len-1; 0 < len2; len2--) {
l2 = rb_enc_precise_mbclen(p, p+len2, enc);
if (!MBCLEN_INVALID_P(l2))
break;
}
memset(p+len2+1, 0, len-(len2+1));
}
}
}
/*
overwrite +p+ by succeeding letter in +enc+ and returns
NEIGHBOR_FOUND or NEIGHBOR_WRAPPED.
When NEIGHBOR_WRAPPED, carried-out letter is stored into carry.
assuming each ranges are successive, and mbclen
never change in each ranges.
NEIGHBOR_NOT_CHAR is returned if invalid character or the range has only one
character.
*/
static enum neighbor_char
enc_succ_alnum_char(char *p, long len, rb_encoding *enc, char *carry)
{
enum neighbor_char ret;
unsigned int c;
int ctype;
int range;
char save[ONIGENC_CODE_TO_MBC_MAXLEN];
/* skip 03A2, invalid char between GREEK CAPITAL LETTERS */
int try;
const int max_gaps = 1;
c = rb_enc_mbc_to_codepoint(p, p+len, enc);
if (rb_enc_isctype(c, ONIGENC_CTYPE_DIGIT, enc))
ctype = ONIGENC_CTYPE_DIGIT;
else if (rb_enc_isctype(c, ONIGENC_CTYPE_ALPHA, enc))
ctype = ONIGENC_CTYPE_ALPHA;
else
return NEIGHBOR_NOT_CHAR;
MEMCPY(save, p, char, len);
for (try = 0; try <= max_gaps; ++try) {
ret = enc_succ_char(p, len, enc);
if (ret == NEIGHBOR_FOUND) {
c = rb_enc_mbc_to_codepoint(p, p+len, enc);
if (rb_enc_isctype(c, ctype, enc))
return NEIGHBOR_FOUND;
}
}
MEMCPY(p, save, char, len);
range = 1;
while (1) {
MEMCPY(save, p, char, len);
ret = enc_pred_char(p, len, enc);
if (ret == NEIGHBOR_FOUND) {
c = rb_enc_mbc_to_codepoint(p, p+len, enc);
if (!rb_enc_isctype(c, ctype, enc)) {
MEMCPY(p, save, char, len);
break;
}
}
else {
MEMCPY(p, save, char, len);
break;
}
range++;
}
if (range == 1) {
return NEIGHBOR_NOT_CHAR;
}
if (ctype != ONIGENC_CTYPE_DIGIT) {
MEMCPY(carry, p, char, len);
return NEIGHBOR_WRAPPED;
}
MEMCPY(carry, p, char, len);
enc_succ_char(carry, len, enc);
return NEIGHBOR_WRAPPED;
}
static VALUE str_succ(VALUE str);
/*
* call-seq:
* succ -> new_str
*
* Returns the successor to +self+. The successor is calculated by
* incrementing characters.
*
* The first character to be incremented is the rightmost alphanumeric:
* or, if no alphanumerics, the rightmost character:
*
* 'THX1138'.succ # => "THX1139"
* '<<koala>>'.succ # => "<<koalb>>"
* '***'.succ # => '**+'
*
* The successor to a digit is another digit, "carrying" to the next-left
* character for a "rollover" from 9 to 0, and prepending another digit
* if necessary:
*
* '00'.succ # => "01"
* '09'.succ # => "10"
* '99'.succ # => "100"
*
* The successor to a letter is another letter of the same case,
* carrying to the next-left character for a rollover,
* and prepending another same-case letter if necessary:
*
* 'aa'.succ # => "ab"
* 'az'.succ # => "ba"
* 'zz'.succ # => "aaa"
* 'AA'.succ # => "AB"
* 'AZ'.succ # => "BA"
* 'ZZ'.succ # => "AAA"
*
* The successor to a non-alphanumeric character is the next character
* in the underlying character set's collating sequence,
* carrying to the next-left character for a rollover,
* and prepending another character if necessary:
*
* s = 0.chr * 3
* s # => "\x00\x00\x00"
* s.succ # => "\x00\x00\x01"
* s = 255.chr * 3
* s # => "\xFF\xFF\xFF"
* s.succ # => "\x01\x00\x00\x00"
*
* Carrying can occur between and among mixtures of alphanumeric characters:
*
* s = 'zz99zz99'
* s.succ # => "aaa00aa00"
* s = '99zz99zz'
* s.succ # => "100aa00aa"
*
* The successor to an empty \String is a new empty \String:
*
* ''.succ # => ""
*
* String#next is an alias for String#succ.
*/
VALUE
rb_str_succ(VALUE orig)
{
VALUE str;
str = rb_str_new(RSTRING_PTR(orig), RSTRING_LEN(orig));
rb_enc_cr_str_copy_for_substr(str, orig);
return str_succ(str);
}
static VALUE
str_succ(VALUE str)
{
rb_encoding *enc;
char *sbeg, *s, *e, *last_alnum = 0;
int found_alnum = 0;
long l, slen;
char carry[ONIGENC_CODE_TO_MBC_MAXLEN] = "\1";
long carry_pos = 0, carry_len = 1;
enum neighbor_char neighbor = NEIGHBOR_FOUND;
slen = RSTRING_LEN(str);
if (slen == 0) return str;
enc = STR_ENC_GET(str);
sbeg = RSTRING_PTR(str);
s = e = sbeg + slen;
while ((s = rb_enc_prev_char(sbeg, s, e, enc)) != 0) {
if (neighbor == NEIGHBOR_NOT_CHAR && last_alnum) {
if (ISALPHA(*last_alnum) ? ISDIGIT(*s) :
ISDIGIT(*last_alnum) ? ISALPHA(*s) : 0) {
break;
}
}
l = rb_enc_precise_mbclen(s, e, enc);
if (!ONIGENC_MBCLEN_CHARFOUND_P(l)) continue;
l = ONIGENC_MBCLEN_CHARFOUND_LEN(l);
neighbor = enc_succ_alnum_char(s, l, enc, carry);
switch (neighbor) {
case NEIGHBOR_NOT_CHAR:
continue;
case NEIGHBOR_FOUND:
return str;
case NEIGHBOR_WRAPPED:
last_alnum = s;
break;
}
found_alnum = 1;
carry_pos = s - sbeg;
carry_len = l;
}
if (!found_alnum) { /* str contains no alnum */
s = e;
while ((s = rb_enc_prev_char(sbeg, s, e, enc)) != 0) {
enum neighbor_char neighbor;
char tmp[ONIGENC_CODE_TO_MBC_MAXLEN];
l = rb_enc_precise_mbclen(s, e, enc);
if (!ONIGENC_MBCLEN_CHARFOUND_P(l)) continue;
l = ONIGENC_MBCLEN_CHARFOUND_LEN(l);
MEMCPY(tmp, s, char, l);
neighbor = enc_succ_char(tmp, l, enc);
switch (neighbor) {
case NEIGHBOR_FOUND:
MEMCPY(s, tmp, char, l);
return str;
break;
case NEIGHBOR_WRAPPED:
MEMCPY(s, tmp, char, l);
break;
case NEIGHBOR_NOT_CHAR:
break;
}
if (rb_enc_precise_mbclen(s, s+l, enc) != l) {
/* wrapped to \0...\0. search next valid char. */
enc_succ_char(s, l, enc);
}
if (!rb_enc_asciicompat(enc)) {
MEMCPY(carry, s, char, l);
carry_len = l;
}
carry_pos = s - sbeg;
}
ENC_CODERANGE_SET(str, ENC_CODERANGE_UNKNOWN);
}
RESIZE_CAPA(str, slen + carry_len);
sbeg = RSTRING_PTR(str);
s = sbeg + carry_pos;
memmove(s + carry_len, s, slen - carry_pos);
memmove(s, carry, carry_len);
slen += carry_len;
STR_SET_LEN(str, slen);
TERM_FILL(&sbeg[slen], rb_enc_mbminlen(enc));
rb_enc_str_coderange(str);
return str;
}
/*
* call-seq:
* succ! -> self
*
* Equivalent to String#succ, but modifies +self+ in place; returns +self+.
*
* String#next! is an alias for String#succ!.
*/
static VALUE
rb_str_succ_bang(VALUE str)
{
rb_str_modify(str);
str_succ(str);
return str;
}
static int
all_digits_p(const char *s, long len)
{
while (len-- > 0) {
if (!ISDIGIT(*s)) return 0;
s++;
}
return 1;
}
static int
str_upto_i(VALUE str, VALUE arg)
{
rb_yield(str);
return 0;
}
/*
* call-seq:
* upto(other_string, exclusive = false) {|string| ... } -> self
* upto(other_string, exclusive = false) -> new_enumerator
*
* With a block given, calls the block with each \String value
* returned by successive calls to String#succ;
* the first value is +self+, the next is <tt>self.succ</tt>, and so on;
* the sequence terminates when value +other_string+ is reached;
* returns +self+:
*
* 'a8'.upto('b6') {|s| print s, ' ' } # => "a8"
* Output:
*
* a8 a9 b0 b1 b2 b3 b4 b5 b6
*
* If argument +exclusive+ is given as a truthy object, the last value is omitted:
*
* 'a8'.upto('b6', true) {|s| print s, ' ' } # => "a8"
*
* Output:
*
* a8 a9 b0 b1 b2 b3 b4 b5
*
* If +other_string+ would not be reached, does not call the block:
*
* '25'.upto('5') {|s| fail s }
* 'aa'.upto('a') {|s| fail s }
*
* With no block given, returns a new \Enumerator:
*
* 'a8'.upto('b6') # => #<Enumerator: "a8":upto("b6")>
*
*/
static VALUE
rb_str_upto(int argc, VALUE *argv, VALUE beg)
{
VALUE end, exclusive;
rb_scan_args(argc, argv, "11", &end, &exclusive);
RETURN_ENUMERATOR(beg, argc, argv);
return rb_str_upto_each(beg, end, RTEST(exclusive), str_upto_i, Qnil);
}
VALUE
rb_str_upto_each(VALUE beg, VALUE end, int excl, int (*each)(VALUE, VALUE), VALUE arg)
{
VALUE current, after_end;
ID succ;
int n, ascii;
rb_encoding *enc;
CONST_ID(succ, "succ");
StringValue(end);
enc = rb_enc_check(beg, end);
ascii = (is_ascii_string(beg) && is_ascii_string(end));
/* single character */
if (RSTRING_LEN(beg) == 1 && RSTRING_LEN(end) == 1 && ascii) {
char c = RSTRING_PTR(beg)[0];
char e = RSTRING_PTR(end)[0];
if (c > e || (excl && c == e)) return beg;
for (;;) {
if ((*each)(rb_enc_str_new(&c, 1, enc), arg)) break;
if (!excl && c == e) break;
c++;
if (excl && c == e) break;
}
return beg;
}
/* both edges are all digits */
if (ascii && ISDIGIT(RSTRING_PTR(beg)[0]) && ISDIGIT(RSTRING_PTR(end)[0]) &&
all_digits_p(RSTRING_PTR(beg), RSTRING_LEN(beg)) &&
all_digits_p(RSTRING_PTR(end), RSTRING_LEN(end))) {
VALUE b, e;
int width;
width = RSTRING_LENINT(beg);
b = rb_str_to_inum(beg, 10, FALSE);
e = rb_str_to_inum(end, 10, FALSE);
if (FIXNUM_P(b) && FIXNUM_P(e)) {
long bi = FIX2LONG(b);
long ei = FIX2LONG(e);
rb_encoding *usascii = rb_usascii_encoding();
while (bi <= ei) {
if (excl && bi == ei) break;
if ((*each)(rb_enc_sprintf(usascii, "%.*ld", width, bi), arg)) break;
bi++;
}
}
else {
ID op = excl ? '<' : idLE;
VALUE args[2], fmt = rb_fstring_lit("%.*d");
args[0] = INT2FIX(width);
while (rb_funcall(b, op, 1, e)) {
args[1] = b;
if ((*each)(rb_str_format(numberof(args), args, fmt), arg)) break;
b = rb_funcallv(b, succ, 0, 0);
}
}
return beg;
}
/* normal case */
n = rb_str_cmp(beg, end);
if (n > 0 || (excl && n == 0)) return beg;
after_end = rb_funcallv(end, succ, 0, 0);
current = str_duplicate(rb_cString, beg);
while (!rb_str_equal(current, after_end)) {
VALUE next = Qnil;
if (excl || !rb_str_equal(current, end))
next = rb_funcallv(current, succ, 0, 0);
if ((*each)(current, arg)) break;
if (NIL_P(next)) break;
current = next;
StringValue(current);
if (excl && rb_str_equal(current, end)) break;
if (RSTRING_LEN(current) > RSTRING_LEN(end) || RSTRING_LEN(current) == 0)
break;
}
return beg;
}
VALUE
rb_str_upto_endless_each(VALUE beg, int (*each)(VALUE, VALUE), VALUE arg)
{
VALUE current;
ID succ;
CONST_ID(succ, "succ");
/* both edges are all digits */
if (is_ascii_string(beg) && ISDIGIT(RSTRING_PTR(beg)[0]) &&
all_digits_p(RSTRING_PTR(beg), RSTRING_LEN(beg))) {
VALUE b, args[2], fmt = rb_fstring_lit("%.*d");
int width = RSTRING_LENINT(beg);
b = rb_str_to_inum(beg, 10, FALSE);
if (FIXNUM_P(b)) {
long bi = FIX2LONG(b);
rb_encoding *usascii = rb_usascii_encoding();
while (FIXABLE(bi)) {
if ((*each)(rb_enc_sprintf(usascii, "%.*ld", width, bi), arg)) break;
bi++;
}
b = LONG2NUM(bi);
}
args[0] = INT2FIX(width);
while (1) {
args[1] = b;
if ((*each)(rb_str_format(numberof(args), args, fmt), arg)) break;
b = rb_funcallv(b, succ, 0, 0);
}
}
/* normal case */
current = str_duplicate(rb_cString, beg);
while (1) {
VALUE next = rb_funcallv(current, succ, 0, 0);
if ((*each)(current, arg)) break;
current = next;
StringValue(current);
if (RSTRING_LEN(current) == 0)
break;
}
return beg;
}
static int
include_range_i(VALUE str, VALUE arg)
{
VALUE *argp = (VALUE *)arg;
if (!rb_equal(str, *argp)) return 0;
*argp = Qnil;
return 1;
}
VALUE
rb_str_include_range_p(VALUE beg, VALUE end, VALUE val, VALUE exclusive)
{
beg = rb_str_new_frozen(beg);
StringValue(end);
end = rb_str_new_frozen(end);
if (NIL_P(val)) return Qfalse;
val = rb_check_string_type(val);
if (NIL_P(val)) return Qfalse;
if (rb_enc_asciicompat(STR_ENC_GET(beg)) &&
rb_enc_asciicompat(STR_ENC_GET(end)) &&
rb_enc_asciicompat(STR_ENC_GET(val))) {
const char *bp = RSTRING_PTR(beg);
const char *ep = RSTRING_PTR(end);
const char *vp = RSTRING_PTR(val);
if (RSTRING_LEN(beg) == 1 && RSTRING_LEN(end) == 1) {
if (RSTRING_LEN(val) == 0 || RSTRING_LEN(val) > 1)
return Qfalse;
else {
char b = *bp;
char e = *ep;
char v = *vp;
if (ISASCII(b) && ISASCII(e) && ISASCII(v)) {
if (b <= v && v < e) return Qtrue;
return RBOOL(!RTEST(exclusive) && v == e);
}
}
}
#if 0
/* both edges are all digits */
if (ISDIGIT(*bp) && ISDIGIT(*ep) &&
all_digits_p(bp, RSTRING_LEN(beg)) &&
all_digits_p(ep, RSTRING_LEN(end))) {
/* TODO */
}
#endif
}
rb_str_upto_each(beg, end, RTEST(exclusive), include_range_i, (VALUE)&val);
return RBOOL(NIL_P(val));
}
static VALUE
rb_str_subpat(VALUE str, VALUE re, VALUE backref)
{
if (rb_reg_search(re, str, 0, 0) >= 0) {
VALUE match = rb_backref_get();
int nth = rb_reg_backref_number(match, backref);
return rb_reg_nth_match(nth, match);
}
return Qnil;
}
static VALUE
rb_str_aref(VALUE str, VALUE indx)
{
long idx;
if (FIXNUM_P(indx)) {
idx = FIX2LONG(indx);
}
else if (RB_TYPE_P(indx, T_REGEXP)) {
return rb_str_subpat(str, indx, INT2FIX(0));
}
else if (RB_TYPE_P(indx, T_STRING)) {
if (rb_str_index(str, indx, 0) != -1)
return str_duplicate(rb_cString, indx);
return Qnil;
}
else {
/* check if indx is Range */
long beg, len = str_strlen(str, NULL);
switch (rb_range_beg_len(indx, &beg, &len, len, 0)) {
case Qfalse:
break;
case Qnil:
return Qnil;
default:
return rb_str_substr(str, beg, len);
}
idx = NUM2LONG(indx);
}
return str_substr(str, idx, 1, FALSE);
}
/*
* call-seq:
* string[index] -> new_string or nil
* string[start, length] -> new_string or nil
* string[range] -> new_string or nil
* string[regexp, capture = 0] -> new_string or nil
* string[substring] -> new_string or nil
*
* Returns the substring of +self+ specified by the arguments.
*
* When the single \Integer argument +index+ is given,
* returns the 1-character substring found in +self+ at offset +index+:
*
* 'bar'[2] # => "r"
*
* Counts backward from the end of +self+ if +index+ is negative:
*
* 'foo'[-3] # => "f"
*
* Returns +nil+ if +index+ is out of range:
*
* 'foo'[3] # => nil
* 'foo'[-4] # => nil
*
* When the two \Integer arguments +start+ and +length+ are given,
* returns the substring of the given +length+ found in +self+ at offset +start+:
*
* 'foo'[0, 2] # => "fo"
* 'foo'[0, 0] # => ""
*
* Counts backward from the end of +self+ if +start+ is negative:
*
* 'foo'[-2, 2] # => "oo"
*
* Special case: returns a new empty \String if +start+ is equal to the length of +self+:
*
* 'foo'[3, 2] # => ""
*
* Returns +nil+ if +start+ is out of range:
*
* 'foo'[4, 2] # => nil
* 'foo'[-4, 2] # => nil
*
* Returns the trailing substring of +self+ if +length+ is large:
*
* 'foo'[1, 50] # => "oo"
*
* Returns +nil+ if +length+ is negative:
*
* 'foo'[0, -1] # => nil
*
* When the single \Range argument +range+ is given,
* derives +start+ and +length+ values from the given +range+,
* and returns values as above:
*
* - <tt>'foo'[0..1]</tt> is equivalent to <tt>'foo'[0, 2]</tt>.
* - <tt>'foo'[0...1]</tt> is equivalent to <tt>'foo'[0, 1]</tt>.
*
* When the \Regexp argument +regexp+ is given,
* and the +capture+ argument is <tt>0</tt>,
* returns the first matching substring found in +self+,
* or +nil+ if none found:
*
* 'foo'[/o/] # => "o"
* 'foo'[/x/] # => nil
* s = 'hello there'
* s[/[aeiou](.)\1/] # => "ell"
* s[/[aeiou](.)\1/, 0] # => "ell"
*
* If argument +capture+ is given and not <tt>0</tt>,
* it should be either an \Integer capture group index or a \String or \Symbol capture group name;
* the method call returns only the specified capture
* (see {Regexp Capturing}[Regexp.html#class-Regexp-label-Capturing]):
*
* s = 'hello there'
* s[/[aeiou](.)\1/, 1] # => "l"
* s[/(?<vowel>[aeiou])(?<non_vowel>[^aeiou])/, "non_vowel"] # => "l"
* s[/(?<vowel>[aeiou])(?<non_vowel>[^aeiou])/, :vowel] # => "e"
*
* If an invalid capture group index is given, +nil+ is returned. If an invalid
* capture group name is given, +IndexError+ is raised.
*
* When the single \String argument +substring+ is given,
* returns the substring from +self+ if found, otherwise +nil+:
*
* 'foo'['oo'] # => "oo"
* 'foo'['xx'] # => nil
*
* String#slice is an alias for String#[].
*/
static VALUE
rb_str_aref_m(int argc, VALUE *argv, VALUE str)
{
if (argc == 2) {
if (RB_TYPE_P(argv[0], T_REGEXP)) {
return rb_str_subpat(str, argv[0], argv[1]);
}
else {
long beg = NUM2LONG(argv[0]);
long len = NUM2LONG(argv[1]);
return rb_str_substr(str, beg, len);
}
}
rb_check_arity(argc, 1, 2);
return rb_str_aref(str, argv[0]);
}
VALUE
rb_str_drop_bytes(VALUE str, long len)
{
char *ptr = RSTRING_PTR(str);
long olen = RSTRING_LEN(str), nlen;
str_modifiable(str);
if (len > olen) len = olen;
nlen = olen - len;
if (str_embed_capa(str) >= nlen + TERM_LEN(str)) {
char *oldptr = ptr;
int fl = (int)(RBASIC(str)->flags & (STR_NOEMBED|STR_SHARED|STR_NOFREE));
STR_SET_EMBED(str);
STR_SET_EMBED_LEN(str, nlen);
ptr = RSTRING(str)->as.embed.ary;
memmove(ptr, oldptr + len, nlen);
if (fl == STR_NOEMBED) xfree(oldptr);
}
else {
if (!STR_SHARED_P(str)) {
VALUE shared = heap_str_make_shared(rb_obj_class(str), str);
rb_enc_cr_str_exact_copy(shared, str);
OBJ_FREEZE(shared);
}
ptr = RSTRING(str)->as.heap.ptr += len;
RSTRING(str)->as.heap.len = nlen;
}
ptr[nlen] = 0;
ENC_CODERANGE_CLEAR(str);
return str;
}
static void
rb_str_splice_0(VALUE str, long beg, long len, VALUE val)
{
char *sptr;
long slen, vlen = RSTRING_LEN(val);
int cr;
if (beg == 0 && vlen == 0) {
rb_str_drop_bytes(str, len);
return;
}
str_modify_keep_cr(str);
RSTRING_GETMEM(str, sptr, slen);
if (len < vlen) {
/* expand string */
RESIZE_CAPA(str, slen + vlen - len);
sptr = RSTRING_PTR(str);
}
if (ENC_CODERANGE(str) == ENC_CODERANGE_7BIT)
cr = rb_enc_str_coderange(val);
else
cr = ENC_CODERANGE_UNKNOWN;
if (vlen != len) {
memmove(sptr + beg + vlen,
sptr + beg + len,
slen - (beg + len));
}
if (vlen < beg && len < 0) {
MEMZERO(sptr + slen, char, -len);
}
if (vlen > 0) {
memmove(sptr + beg, RSTRING_PTR(val), vlen);
}
slen += vlen - len;
STR_SET_LEN(str, slen);
TERM_FILL(&sptr[slen], TERM_LEN(str));
ENC_CODERANGE_SET(str, cr);
}
void
rb_str_update(VALUE str, long beg, long len, VALUE val)
{
long slen;
char *p, *e;
rb_encoding *enc;
int singlebyte = single_byte_optimizable(str);
int cr;
if (len < 0) rb_raise(rb_eIndexError, "negative length %ld", len);
StringValue(val);
enc = rb_enc_check(str, val);
slen = str_strlen(str, enc); /* rb_enc_check */
if ((slen < beg) || ((beg < 0) && (beg + slen < 0))) {
rb_raise(rb_eIndexError, "index %ld out of string", beg);
}
if (beg < 0) {
beg += slen;
}
assert(beg >= 0);
assert(beg <= slen);
if (len > slen - beg) {
len = slen - beg;
}
str_modify_keep_cr(str);
p = str_nth(RSTRING_PTR(str), RSTRING_END(str), beg, enc, singlebyte);
if (!p) p = RSTRING_END(str);
e = str_nth(p, RSTRING_END(str), len, enc, singlebyte);
if (!e) e = RSTRING_END(str);
/* error check */
beg = p - RSTRING_PTR(str); /* physical position */
len = e - p; /* physical length */
rb_str_splice_0(str, beg, len, val);
rb_enc_associate(str, enc);
cr = ENC_CODERANGE_AND(ENC_CODERANGE(str), ENC_CODERANGE(val));
if (cr != ENC_CODERANGE_BROKEN)
ENC_CODERANGE_SET(str, cr);
}
#define rb_str_splice(str, beg, len, val) rb_str_update(str, beg, len, val)
static void
rb_str_subpat_set(VALUE str, VALUE re, VALUE backref, VALUE val)
{
int nth;
VALUE match;
long start, end, len;
rb_encoding *enc;
struct re_registers *regs;
if (rb_reg_search(re, str, 0, 0) < 0) {
rb_raise(rb_eIndexError, "regexp not matched");
}
match = rb_backref_get();
nth = rb_reg_backref_number(match, backref);
regs = RMATCH_REGS(match);
if ((nth >= regs->num_regs) || ((nth < 0) && (-nth >= regs->num_regs))) {
rb_raise(rb_eIndexError, "index %d out of regexp", nth);
}
if (nth < 0) {
nth += regs->num_regs;
}
start = BEG(nth);
if (start == -1) {
rb_raise(rb_eIndexError, "regexp group %d not matched", nth);
}
end = END(nth);
len = end - start;
StringValue(val);
enc = rb_enc_check_str(str, val);
rb_str_splice_0(str, start, len, val);
rb_enc_associate(str, enc);
}
static VALUE
rb_str_aset(VALUE str, VALUE indx, VALUE val)
{
long idx, beg;
switch (TYPE(indx)) {
case T_REGEXP:
rb_str_subpat_set(str, indx, INT2FIX(0), val);
return val;
case T_STRING:
beg = rb_str_index(str, indx, 0);
if (beg < 0) {
rb_raise(rb_eIndexError, "string not matched");
}
beg = rb_str_sublen(str, beg);
rb_str_splice(str, beg, str_strlen(indx, NULL), val);
return val;
default:
/* check if indx is Range */
{
long beg, len;
if (rb_range_beg_len(indx, &beg, &len, str_strlen(str, NULL), 2)) {
rb_str_splice(str, beg, len, val);
return val;
}
}
/* FALLTHROUGH */
case T_FIXNUM:
idx = NUM2LONG(indx);
rb_str_splice(str, idx, 1, val);
return val;
}
}
/*
* call-seq:
* str[integer] = new_str
* str[integer, integer] = new_str
* str[range] = aString
* str[regexp] = new_str
* str[regexp, integer] = new_str
* str[regexp, name] = new_str
* str[other_str] = new_str
*
* Element Assignment---Replaces some or all of the content of
* <i>str</i>. The portion of the string affected is determined using
* the same criteria as String#[]. If the replacement string is not
* the same length as the text it is replacing, the string will be
* adjusted accordingly. If the regular expression or string is used
* as the index doesn't match a position in the string, IndexError is
* raised. If the regular expression form is used, the optional
* second Integer allows you to specify which portion of the match to
* replace (effectively using the MatchData indexing rules. The forms
* that take an Integer will raise an IndexError if the value is out
* of range; the Range form will raise a RangeError, and the Regexp
* and String will raise an IndexError on negative match.
*/
static VALUE
rb_str_aset_m(int argc, VALUE *argv, VALUE str)
{
if (argc == 3) {
if (RB_TYPE_P(argv[0], T_REGEXP)) {
rb_str_subpat_set(str, argv[0], argv[1], argv[2]);
}
else {
rb_str_splice(str, NUM2LONG(argv[0]), NUM2LONG(argv[1]), argv[2]);
}
return argv[2];
}
rb_check_arity(argc, 2, 3);
return rb_str_aset(str, argv[0], argv[1]);
}
/*
* call-seq:
* insert(index, other_string) -> self
*
* Inserts the given +other_string+ into +self+; returns +self+.
*
* If the \Integer +index+ is positive, inserts +other_string+ at offset +index+:
*
* 'foo'.insert(1, 'bar') # => "fbaroo"
*
* If the \Integer +index+ is negative, counts backward from the end of +self+
* and inserts +other_string+ at offset <tt>index+1</tt>
* (that is, _after_ <tt>self[index]</tt>):
*
* 'foo'.insert(-2, 'bar') # => "fobaro"
*
*/
static VALUE
rb_str_insert(VALUE str, VALUE idx, VALUE str2)
{
long pos = NUM2LONG(idx);
if (pos == -1) {
return rb_str_append(str, str2);
}
else if (pos < 0) {
pos++;
}
rb_str_splice(str, pos, 0, str2);
return str;
}
/*
* call-seq:
* slice!(index) -> new_string or nil
* slice!(start, length) -> new_string or nil
* slice!(range) -> new_string or nil
* slice!(regexp, capture = 0) -> new_string or nil
* slice!(substring) -> new_string or nil
*
* Removes the substring of +self+ specified by the arguments;
* returns the removed substring.
*
* See String#[] for details about the arguments that specify the substring.
*
* A few examples:
*
* string = "This is a string"
* string.slice!(2) #=> "i"
* string.slice!(3..6) #=> " is "
* string.slice!(/s.*t/) #=> "sa st"
* string.slice!("r") #=> "r"
* string #=> "Thing"
*
*/
static VALUE
rb_str_slice_bang(int argc, VALUE *argv, VALUE str)
{
VALUE result = Qnil;
VALUE indx;
long beg, len = 1;
char *p;
rb_check_arity(argc, 1, 2);
str_modify_keep_cr(str);
indx = argv[0];
if (RB_TYPE_P(indx, T_REGEXP)) {
if (rb_reg_search(indx, str, 0, 0) < 0) return Qnil;
VALUE match = rb_backref_get();
struct re_registers *regs = RMATCH_REGS(match);
int nth = 0;
if (argc > 1 && (nth = rb_reg_backref_number(match, argv[1])) < 0) {
if ((nth += regs->num_regs) <= 0) return Qnil;
}
else if (nth >= regs->num_regs) return Qnil;
beg = BEG(nth);
len = END(nth) - beg;
goto subseq;
}
else if (argc == 2) {
beg = NUM2LONG(indx);
len = NUM2LONG(argv[1]);
goto num_index;
}
else if (FIXNUM_P(indx)) {
beg = FIX2LONG(indx);
if (!(p = rb_str_subpos(str, beg, &len))) return Qnil;
if (!len) return Qnil;
beg = p - RSTRING_PTR(str);
goto subseq;
}
else if (RB_TYPE_P(indx, T_STRING)) {
beg = rb_str_index(str, indx, 0);
if (beg == -1) return Qnil;
len = RSTRING_LEN(indx);
result = str_duplicate(rb_cString, indx);
goto squash;
}
else {
switch (rb_range_beg_len(indx, &beg, &len, str_strlen(str, NULL), 0)) {
case Qnil:
return Qnil;
case Qfalse:
beg = NUM2LONG(indx);
if (!(p = rb_str_subpos(str, beg, &len))) return Qnil;
if (!len) return Qnil;
beg = p - RSTRING_PTR(str);
goto subseq;
default:
goto num_index;
}
}
num_index:
if (!(p = rb_str_subpos(str, beg, &len))) return Qnil;
beg = p - RSTRING_PTR(str);
subseq:
result = rb_str_new(RSTRING_PTR(str)+beg, len);
rb_enc_cr_str_copy_for_substr(result, str);
squash:
if (len > 0) {
if (beg == 0) {
rb_str_drop_bytes(str, len);
}
else {
char *sptr = RSTRING_PTR(str);
long slen = RSTRING_LEN(str);
if (beg + len > slen) /* pathological check */
len = slen - beg;
memmove(sptr + beg,
sptr + beg + len,
slen - (beg + len));
slen -= len;
STR_SET_LEN(str, slen);
TERM_FILL(&sptr[slen], TERM_LEN(str));
}
}
return result;
}
static VALUE
get_pat(VALUE pat)
{
VALUE val;
switch (OBJ_BUILTIN_TYPE(pat)) {
case T_REGEXP:
return pat;
case T_STRING:
break;
default:
val = rb_check_string_type(pat);
if (NIL_P(val)) {
Check_Type(pat, T_REGEXP);
}
pat = val;
}
return rb_reg_regcomp(pat);
}
static VALUE
get_pat_quoted(VALUE pat, int check)
{
VALUE val;
switch (OBJ_BUILTIN_TYPE(pat)) {
case T_REGEXP:
return pat;
case T_STRING:
break;
default:
val = rb_check_string_type(pat);
if (NIL_P(val)) {
Check_Type(pat, T_REGEXP);
}
pat = val;
}
if (check && is_broken_string(pat)) {
rb_exc_raise(rb_reg_check_preprocess(pat));
}
return pat;
}
static long
rb_pat_search(VALUE pat, VALUE str, long pos, int set_backref_str)
{
if (BUILTIN_TYPE(pat) == T_STRING) {
pos = rb_strseq_index(str, pat, pos, 1);
if (set_backref_str) {
if (pos >= 0) {
str = rb_str_new_frozen_String(str);
rb_backref_set_string(str, pos, RSTRING_LEN(pat));
}
else {
rb_backref_set(Qnil);
}
}
return pos;
}
else {
return rb_reg_search0(pat, str, pos, 0, set_backref_str);
}
}
/*
* call-seq:
* sub!(pattern, replacement) -> self or nil
* sub!(pattern) {|match| ... } -> self or nil
*
* Returns +self+ with only the first occurrence
* (not all occurrences) of the given +pattern+ replaced.
*
* See {Substitution Methods}[#class-String-label-Substitution+Methods].
*
* Related: String#sub, String#gsub, String#gsub!.
*
*/
static VALUE
rb_str_sub_bang(int argc, VALUE *argv, VALUE str)
{
VALUE pat, repl, hash = Qnil;
int iter = 0;
long plen;
int min_arity = rb_block_given_p() ? 1 : 2;
long beg;
rb_check_arity(argc, min_arity, 2);
if (argc == 1) {
iter = 1;
}
else {
repl = argv[1];
hash = rb_check_hash_type(argv[1]);
if (NIL_P(hash)) {
StringValue(repl);
}
}
pat = get_pat_quoted(argv[0], 1);
str_modifiable(str);
beg = rb_pat_search(pat, str, 0, 1);
if (beg >= 0) {
rb_encoding *enc;
int cr = ENC_CODERANGE(str);
long beg0, end0;
VALUE match, match0 = Qnil;
struct re_registers *regs;
char *p, *rp;
long len, rlen;
match = rb_backref_get();
regs = RMATCH_REGS(match);
if (RB_TYPE_P(pat, T_STRING)) {
beg0 = beg;
end0 = beg0 + RSTRING_LEN(pat);
match0 = pat;
}
else {
beg0 = BEG(0);
end0 = END(0);
if (iter) match0 = rb_reg_nth_match(0, match);
}
if (iter || !NIL_P(hash)) {
p = RSTRING_PTR(str); len = RSTRING_LEN(str);
if (iter) {
repl = rb_obj_as_string(rb_yield(match0));
}
else {
repl = rb_hash_aref(hash, rb_str_subseq(str, beg0, end0 - beg0));
repl = rb_obj_as_string(repl);
}
str_mod_check(str, p, len);
rb_check_frozen(str);
}
else {
repl = rb_reg_regsub(repl, str, regs, RB_TYPE_P(pat, T_STRING) ? Qnil : pat);
}
enc = rb_enc_compatible(str, repl);
if (!enc) {
rb_encoding *str_enc = STR_ENC_GET(str);
p = RSTRING_PTR(str); len = RSTRING_LEN(str);
if (coderange_scan(p, beg0, str_enc) != ENC_CODERANGE_7BIT ||
coderange_scan(p+end0, len-end0, str_enc) != ENC_CODERANGE_7BIT) {
rb_raise(rb_eEncCompatError, "incompatible character encodings: %s and %s",
rb_enc_name(str_enc),
rb_enc_name(STR_ENC_GET(repl)));
}
enc = STR_ENC_GET(repl);
}
rb_str_modify(str);
rb_enc_associate(str, enc);
if (ENC_CODERANGE_UNKNOWN < cr && cr < ENC_CODERANGE_BROKEN) {
int cr2 = ENC_CODERANGE(repl);
if (cr2 == ENC_CODERANGE_BROKEN ||
(cr == ENC_CODERANGE_VALID && cr2 == ENC_CODERANGE_7BIT))
cr = ENC_CODERANGE_UNKNOWN;
else
cr = cr2;
}
plen = end0 - beg0;
rlen = RSTRING_LEN(repl);
len = RSTRING_LEN(str);
if (rlen > plen) {
RESIZE_CAPA(str, len + rlen - plen);
}
p = RSTRING_PTR(str);
if (rlen != plen) {
memmove(p + beg0 + rlen, p + beg0 + plen, len - beg0 - plen);
}
rp = RSTRING_PTR(repl);
memmove(p + beg0, rp, rlen);
len += rlen - plen;
STR_SET_LEN(str, len);
TERM_FILL(&RSTRING_PTR(str)[len], TERM_LEN(str));
ENC_CODERANGE_SET(str, cr);
return str;
}
return Qnil;
}
/*
* call-seq:
* sub(pattern, replacement) -> new_string
* sub(pattern) {|match| ... } -> new_string
*
* Returns a copy of +self+ with only the first occurrence
* (not all occurrences) of the given +pattern+ replaced.
*
* See {Substitution Methods}[#class-String-label-Substitution+Methods].
*
* Related: String#sub!, String#gsub, String#gsub!.
*
*/
static VALUE
rb_str_sub(int argc, VALUE *argv, VALUE str)
{
str = str_duplicate(rb_cString, str);
rb_str_sub_bang(argc, argv, str);
return str;
}
static VALUE
str_gsub(int argc, VALUE *argv, VALUE str, int bang)
{
VALUE pat, val = Qnil, repl, match, match0 = Qnil, dest, hash = Qnil;
struct re_registers *regs;
long beg, beg0, end0;
long offset, blen, slen, len, last;
enum {STR, ITER, MAP} mode = STR;
char *sp, *cp;
int need_backref = -1;
rb_encoding *str_enc;
switch (argc) {
case 1:
RETURN_ENUMERATOR(str, argc, argv);
mode = ITER;
break;
case 2:
repl = argv[1];
hash = rb_check_hash_type(argv[1]);
if (NIL_P(hash)) {
StringValue(repl);
}
else {
mode = MAP;
}
break;
default:
rb_error_arity(argc, 1, 2);
}
pat = get_pat_quoted(argv[0], 1);
beg = rb_pat_search(pat, str, 0, need_backref);
if (beg < 0) {
if (bang) return Qnil; /* no match, no substitution */
return str_duplicate(rb_cString, str);
}
offset = 0;
blen = RSTRING_LEN(str) + 30; /* len + margin */
dest = rb_str_buf_new(blen);
sp = RSTRING_PTR(str);
slen = RSTRING_LEN(str);
cp = sp;
str_enc = STR_ENC_GET(str);
rb_enc_associate(dest, str_enc);
ENC_CODERANGE_SET(dest, rb_enc_asciicompat(str_enc) ? ENC_CODERANGE_7BIT : ENC_CODERANGE_VALID);
do {
match = rb_backref_get();
regs = RMATCH_REGS(match);
if (RB_TYPE_P(pat, T_STRING)) {
beg0 = beg;
end0 = beg0 + RSTRING_LEN(pat);
match0 = pat;
}
else {
beg0 = BEG(0);
end0 = END(0);
if (mode == ITER) match0 = rb_reg_nth_match(0, match);
}
if (mode) {
if (mode == ITER) {
val = rb_obj_as_string(rb_yield(match0));
}
else {
val = rb_hash_aref(hash, rb_str_subseq(str, beg0, end0 - beg0));
val = rb_obj_as_string(val);
}
str_mod_check(str, sp, slen);
if (val == dest) { /* paranoid check [ruby-dev:24827] */
rb_raise(rb_eRuntimeError, "block should not cheat");
}
}
else if (need_backref) {
val = rb_reg_regsub(repl, str, regs, RB_TYPE_P(pat, T_STRING) ? Qnil : pat);
if (need_backref < 0) {
need_backref = val != repl;
}
}
else {
val = repl;
}
len = beg0 - offset; /* copy pre-match substr */
if (len) {
rb_enc_str_buf_cat(dest, cp, len, str_enc);
}
rb_str_buf_append(dest, val);
last = offset;
offset = end0;
if (beg0 == end0) {
/*
* Always consume at least one character of the input string
* in order to prevent infinite loops.
*/
if (RSTRING_LEN(str) <= end0) break;
len = rb_enc_fast_mbclen(RSTRING_PTR(str)+end0, RSTRING_END(str), str_enc);
rb_enc_str_buf_cat(dest, RSTRING_PTR(str)+end0, len, str_enc);
offset = end0 + len;
}
cp = RSTRING_PTR(str) + offset;
if (offset > RSTRING_LEN(str)) break;
beg = rb_pat_search(pat, str, offset, need_backref);
} while (beg >= 0);
if (RSTRING_LEN(str) > offset) {
rb_enc_str_buf_cat(dest, cp, RSTRING_LEN(str) - offset, str_enc);
}
rb_pat_search(pat, str, last, 1);
if (bang) {
str_shared_replace(str, dest);
}
else {
str = dest;
}
return str;
}
/*
* call-seq:
* gsub!(pattern, replacement) -> self or nil
* gsub!(pattern) {|match| ... } -> self or nil
* gsub!(pattern) -> an_enumerator
*
* Performs the specified substring replacement(s) on +self+;
* returns +self+ if any replacement occurred, +nil+ otherwise.
*
* See {Substitution Methods}[#class-String-label-Substitution+Methods].
*
* Returns an Enumerator if no +replacement+ and no block given.
*
* Related: String#sub, String#gsub, String#sub!.
*
*/
static VALUE
rb_str_gsub_bang(int argc, VALUE *argv, VALUE str)
{
str_modify_keep_cr(str);
return str_gsub(argc, argv, str, 1);
}
/*
* call-seq:
* gsub(pattern, replacement) -> new_string
* gsub(pattern) {|match| ... } -> new_string
* gsub(pattern) -> enumerator
*
* Returns a copy of +self+ with all occurrences of the given +pattern+ replaced.
*
* See {Substitution Methods}[#class-String-label-Substitution+Methods].
*
* Returns an Enumerator if no +replacement+ and no block given.
*
* Related: String#sub, String#sub!, String#gsub!.
*
*/
static VALUE
rb_str_gsub(int argc, VALUE *argv, VALUE str)
{
return str_gsub(argc, argv, str, 0);
}
/*
* call-seq:
* replace(other_string) -> self
*
* Replaces the contents of +self+ with the contents of +other_string+:
*
* s = 'foo' # => "foo"
* s.replace('bar') # => "bar"
*
*/
VALUE
rb_str_replace(VALUE str, VALUE str2)
{
str_modifiable(str);
if (str == str2) return str;
StringValue(str2);
str_discard(str);
return str_replace(str, str2);
}
/*
* call-seq:
* clear -> self
*
* Removes the contents of +self+:
*
* s = 'foo' # => "foo"
* s.clear # => ""
*
*/
static VALUE
rb_str_clear(VALUE str)
{
str_discard(str);
STR_SET_EMBED(str);
STR_SET_EMBED_LEN(str, 0);
RSTRING_PTR(str)[0] = 0;
if (rb_enc_asciicompat(STR_ENC_GET(str)))
ENC_CODERANGE_SET(str, ENC_CODERANGE_7BIT);
else
ENC_CODERANGE_SET(str, ENC_CODERANGE_VALID);
return str;
}
/*
* call-seq:
* chr -> string
*
* Returns a string containing the first character of +self+:
*
* s = 'foo' # => "foo"
* s.chr # => "f"
*
*/
static VALUE
rb_str_chr(VALUE str)
{
return rb_str_substr(str, 0, 1);
}
/*
* call-seq:
* getbyte(index) -> integer
*
* Returns the byte at zero-based +index+ as an integer:
*
* s = 'abcde' # => "abcde"
* s.getbyte(0) # => 97
* s.getbyte(1) # => 98
*
* Related: String#setbyte.
*/
static VALUE
rb_str_getbyte(VALUE str, VALUE index)
{
long pos = NUM2LONG(index);
if (pos < 0)
pos += RSTRING_LEN(str);
if (pos < 0 || RSTRING_LEN(str) <= pos)
return Qnil;
return INT2FIX((unsigned char)RSTRING_PTR(str)[pos]);
}
/*
* call-seq:
* setbyte(index, integer) -> integer
*
* Sets the byte at zero-based +index+ to +integer+; returns +integer+:
*
* s = 'abcde' # => "abcde"
* s.setbyte(0, 98) # => 98
* s # => "bbcde"
*
* Related: String#getbyte.
*/
static VALUE
rb_str_setbyte(VALUE str, VALUE index, VALUE value)
{
long pos = NUM2LONG(index);
long len = RSTRING_LEN(str);
char *ptr, *head, *left = 0;
rb_encoding *enc;
int cr = ENC_CODERANGE_UNKNOWN, width, nlen;
if (pos < -len || len <= pos)
rb_raise(rb_eIndexError, "index %ld out of string", pos);
if (pos < 0)
pos += len;
VALUE v = rb_to_int(value);
VALUE w = rb_int_and(v, INT2FIX(0xff));
char byte = (char)(NUM2INT(w) & 0xFF);
if (!str_independent(str))
str_make_independent(str);
enc = STR_ENC_GET(str);
head = RSTRING_PTR(str);
ptr = &head[pos];
if (!STR_EMBED_P(str)) {
cr = ENC_CODERANGE(str);
switch (cr) {
case ENC_CODERANGE_7BIT:
left = ptr;
*ptr = byte;
if (ISASCII(byte)) goto end;
nlen = rb_enc_precise_mbclen(left, head+len, enc);
if (!MBCLEN_CHARFOUND_P(nlen))
ENC_CODERANGE_SET(str, ENC_CODERANGE_BROKEN);
else
ENC_CODERANGE_SET(str, ENC_CODERANGE_VALID);
goto end;
case ENC_CODERANGE_VALID:
left = rb_enc_left_char_head(head, ptr, head+len, enc);
width = rb_enc_precise_mbclen(left, head+len, enc);
*ptr = byte;
nlen = rb_enc_precise_mbclen(left, head+len, enc);
if (!MBCLEN_CHARFOUND_P(nlen))
ENC_CODERANGE_SET(str, ENC_CODERANGE_BROKEN);
else if (MBCLEN_CHARFOUND_LEN(nlen) != width || ISASCII(byte))
ENC_CODERANGE_CLEAR(str);
goto end;
}
}
ENC_CODERANGE_CLEAR(str);
*ptr = byte;
end:
return value;
}
static VALUE
str_byte_substr(VALUE str, long beg, long len, int empty)
{
char *p, *s = RSTRING_PTR(str);
long n = RSTRING_LEN(str);
VALUE str2;
if (beg > n || len < 0) return Qnil;
if (beg < 0) {
beg += n;
if (beg < 0) return Qnil;
}
if (len > n - beg)
len = n - beg;
if (len <= 0) {
if (!empty) return Qnil;
len = 0;
p = 0;
}
else
p = s + beg;
if (!STR_EMBEDDABLE_P(len, TERM_LEN(str)) && SHARABLE_SUBSTRING_P(beg, len, n)) {
str2 = rb_str_new_frozen(str);
str2 = str_new_shared(rb_cString, str2);
RSTRING(str2)->as.heap.ptr += beg;
RSTRING(str2)->as.heap.len = len;
}
else {
str2 = rb_str_new(p, len);
}
str_enc_copy(str2, str);
if (RSTRING_LEN(str2) == 0) {
if (!rb_enc_asciicompat(STR_ENC_GET(str)))
ENC_CODERANGE_SET(str2, ENC_CODERANGE_VALID);
else
ENC_CODERANGE_SET(str2, ENC_CODERANGE_7BIT);
}
else {
switch (ENC_CODERANGE(str)) {
case ENC_CODERANGE_7BIT:
ENC_CODERANGE_SET(str2, ENC_CODERANGE_7BIT);
break;
default:
ENC_CODERANGE_SET(str2, ENC_CODERANGE_UNKNOWN);
break;
}
}
return str2;
}
static VALUE
str_byte_aref(VALUE str, VALUE indx)
{
long idx;
if (FIXNUM_P(indx)) {
idx = FIX2LONG(indx);
}
else {
/* check if indx is Range */
long beg, len = RSTRING_LEN(str);
switch (rb_range_beg_len(indx, &beg, &len, len, 0)) {
case Qfalse:
break;
case Qnil:
return Qnil;
default:
return str_byte_substr(str, beg, len, TRUE);
}
idx = NUM2LONG(indx);
}
return str_byte_substr(str, idx, 1, FALSE);
}
/*
* call-seq:
* byteslice(index, length = 1) -> string or nil
* byteslice(range) -> string or nil
*
* Returns a substring of +self+, or +nil+ if the substring cannot be constructed.
*
* With integer arguments +index+ and +length+ given,
* returns the substring beginning at the given +index+
* of the given +length+ (if possible),
* or +nil+ if +length+ is negative or +index+ falls outside of +self+:
*
* s = '0123456789' # => "0123456789"
* s.byteslice(2) # => "2"
* s.byteslice(200) # => nil
* s.byteslice(4, 3) # => "456"
* s.byteslice(4, 30) # => "456789"
* s.byteslice(4, -1) # => nil
* s.byteslice(40, 2) # => nil
*
* In either case above, counts backwards from the end of +self+
* if +index+ is negative:
*
* s = '0123456789' # => "0123456789"
* s.byteslice(-4) # => "6"
* s.byteslice(-4, 3) # => "678"
*
* With Range argument +range+ given, returns
* <tt>byteslice(range.begin, range.size)</tt>:
*
* s = '0123456789' # => "0123456789"
* s.byteslice(4..6) # => "456"
* s.byteslice(-6..-4) # => "456"
* s.byteslice(5..2) # => "" # range.size is zero.
* s.byteslice(40..42) # => nil
*
* In all cases, a returned string has the same encoding as +self+:
*
* s.encoding # => #<Encoding:UTF-8>
* s.byteslice(4).encoding # => #<Encoding:UTF-8>
*
*/
static VALUE
rb_str_byteslice(int argc, VALUE *argv, VALUE str)
{
if (argc == 2) {
long beg = NUM2LONG(argv[0]);
long end = NUM2LONG(argv[1]);
return str_byte_substr(str, beg, end, TRUE);
}
rb_check_arity(argc, 1, 2);
return str_byte_aref(str, argv[0]);
}
/*
* call-seq:
* reverse -> string
*
* Returns a new string with the characters from +self+ in reverse order.
*
* 'stressed'.reverse # => "desserts"
*
*/
static VALUE
rb_str_reverse(VALUE str)
{
rb_encoding *enc;
VALUE rev;
char *s, *e, *p;
int cr;
if (RSTRING_LEN(str) <= 1) return str_duplicate(rb_cString, str);
enc = STR_ENC_GET(str);
rev = rb_str_new(0, RSTRING_LEN(str));
s = RSTRING_PTR(str); e = RSTRING_END(str);
p = RSTRING_END(rev);
cr = ENC_CODERANGE(str);
if (RSTRING_LEN(str) > 1) {
if (single_byte_optimizable(str)) {
while (s < e) {
*--p = *s++;
}
}
else if (cr == ENC_CODERANGE_VALID) {
while (s < e) {
int clen = rb_enc_fast_mbclen(s, e, enc);
p -= clen;
memcpy(p, s, clen);
s += clen;
}
}
else {
cr = rb_enc_asciicompat(enc) ?
ENC_CODERANGE_7BIT : ENC_CODERANGE_VALID;
while (s < e) {
int clen = rb_enc_mbclen(s, e, enc);
if (clen > 1 || (*s & 0x80)) cr = ENC_CODERANGE_UNKNOWN;
p -= clen;
memcpy(p, s, clen);
s += clen;
}
}
}
STR_SET_LEN(rev, RSTRING_LEN(str));
str_enc_copy(rev, str);
ENC_CODERANGE_SET(rev, cr);
return rev;
}
/*
* call-seq:
* reverse! -> self
*
* Returns +self+ with its characters reversed:
*
* s = 'stressed'
* s.reverse! # => "desserts"
* s # => "desserts"
*
*/
static VALUE
rb_str_reverse_bang(VALUE str)
{
if (RSTRING_LEN(str) > 1) {
if (single_byte_optimizable(str)) {
char *s, *e, c;
str_modify_keep_cr(str);
s = RSTRING_PTR(str);
e = RSTRING_END(str) - 1;
while (s < e) {
c = *s;
*s++ = *e;
*e-- = c;
}
}
else {
str_shared_replace(str, rb_str_reverse(str));
}
}
else {
str_modify_keep_cr(str);
}
return str;
}
/*
* call-seq:
* include? other_string -> true or false
*
* Returns +true+ if +self+ contains +other_string+, +false+ otherwise:
*
* s = 'foo'
* s.include?('f') # => true
* s.include?('fo') # => true
* s.include?('food') # => false
*
*/
static VALUE
rb_str_include(VALUE str, VALUE arg)
{
long i;
StringValue(arg);
i = rb_str_index(str, arg, 0);
return RBOOL(i != -1);
}
/*
* call-seq:
* to_i(base = 10) -> integer
*
* Returns the result of interpreting leading characters in +self+
* as an integer in the given +base+ (which must be in (2..36)):
*
* '123456'.to_i # => 123456
* '123def'.to_i(16) # => 1195503
*
* Characters past a leading valid number (in the given +base+) are ignored:
*
* '12.345'.to_i # => 12
* '12345'.to_i(2) # => 1
*
* Returns zero if there is no leading valid number:
*
* 'abcdef'.to_i # => 0
* '2'.to_i(2) # => 0
*
*/
static VALUE
rb_str_to_i(int argc, VALUE *argv, VALUE str)
{
int base = 10;
if (rb_check_arity(argc, 0, 1) && (base = NUM2INT(argv[0])) < 0) {
rb_raise(rb_eArgError, "invalid radix %d", base);
}
return rb_str_to_inum(str, base, FALSE);
}
/*
* call-seq:
* to_f -> float
*
* Returns the result of interpreting leading characters in +self+ as a Float:
*
* '3.14159'.to_f # => 3.14159
'1.234e-2'.to_f # => 0.01234
*
* Characters past a leading valid number (in the given +base+) are ignored:
*
* '3.14 (pi to two places)'.to_f # => 3.14
*
* Returns zero if there is no leading valid number:
*
* 'abcdef'.to_f # => 0.0
*
*/
static VALUE
rb_str_to_f(VALUE str)
{
return DBL2NUM(rb_str_to_dbl(str, FALSE));
}
/*
* call-seq:
* to_s -> self or string
*
* Returns +self+ if +self+ is a \String,
* or +self+ converted to a \String if +self+ is a subclass of \String.
*
* String#to_str is an alias for String#to_s.
*
*/
static VALUE
rb_str_to_s(VALUE str)
{
if (rb_obj_class(str) != rb_cString) {
return str_duplicate(rb_cString, str);
}
return str;
}
#if 0
static void
str_cat_char(VALUE str, unsigned int c, rb_encoding *enc)
{
char s[RUBY_MAX_CHAR_LEN];
int n = rb_enc_codelen(c, enc);
rb_enc_mbcput(c, s, enc);
rb_enc_str_buf_cat(str, s, n, enc);
}
#endif
#define CHAR_ESC_LEN 13 /* sizeof(\x{ hex of 32bit unsigned int } \0) */
int
rb_str_buf_cat_escaped_char(VALUE result, unsigned int c, int unicode_p)
{
char buf[CHAR_ESC_LEN + 1];
int l;
#if SIZEOF_INT > 4
c &= 0xffffffff;
#endif
if (unicode_p) {
if (c < 0x7F && ISPRINT(c)) {
snprintf(buf, CHAR_ESC_LEN, "%c", c);
}
else if (c < 0x10000) {
snprintf(buf, CHAR_ESC_LEN, "\\u%04X", c);
}
else {
snprintf(buf, CHAR_ESC_LEN, "\\u{%X}", c);
}
}
else {
if (c < 0x100) {
snprintf(buf, CHAR_ESC_LEN, "\\x%02X", c);
}
else {
snprintf(buf, CHAR_ESC_LEN, "\\x{%X}", c);
}
}
l = (int)strlen(buf); /* CHAR_ESC_LEN cannot exceed INT_MAX */
rb_str_buf_cat(result, buf, l);
return l;
}
const char *
ruby_escaped_char(int c)
{
switch (c) {
case '\0': return "\\0";
case '\n': return "\\n";
case '\r': return "\\r";
case '\t': return "\\t";
case '\f': return "\\f";
case '\013': return "\\v";
case '\010': return "\\b";
case '\007': return "\\a";
case '\033': return "\\e";
case '\x7f': return "\\c?";
}
return NULL;
}
VALUE
rb_str_escape(VALUE str)
{
int encidx = ENCODING_GET(str);
rb_encoding *enc = rb_enc_from_index(encidx);
const char *p = RSTRING_PTR(str);
const char *pend = RSTRING_END(str);
const char *prev = p;
char buf[CHAR_ESC_LEN + 1];
VALUE result = rb_str_buf_new(0);
int unicode_p = rb_enc_unicode_p(enc);
int asciicompat = rb_enc_asciicompat(enc);
while (p < pend) {
unsigned int c;
const char *cc;
int n = rb_enc_precise_mbclen(p, pend, enc);
if (!MBCLEN_CHARFOUND_P(n)) {
if (p > prev) str_buf_cat(result, prev, p - prev);
n = rb_enc_mbminlen(enc);
if (pend < p + n)
n = (int)(pend - p);
while (n--) {
snprintf(buf, CHAR_ESC_LEN, "\\x%02X", *p & 0377);
str_buf_cat(result, buf, strlen(buf));
prev = ++p;
}
continue;
}
n = MBCLEN_CHARFOUND_LEN(n);
c = rb_enc_mbc_to_codepoint(p, pend, enc);
p += n;
cc = ruby_escaped_char(c);
if (cc) {
if (p - n > prev) str_buf_cat(result, prev, p - n - prev);
str_buf_cat(result, cc, strlen(cc));
prev = p;
}
else if (asciicompat && rb_enc_isascii(c, enc) && ISPRINT(c)) {
}
else {
if (p - n > prev) str_buf_cat(result, prev, p - n - prev);
rb_str_buf_cat_escaped_char(result, c, unicode_p);
prev = p;
}
}
if (p > prev) str_buf_cat(result, prev, p - prev);
ENCODING_CODERANGE_SET(result, rb_usascii_encindex(), ENC_CODERANGE_7BIT);
return result;
}
/*
* call-seq:
* inspect -> string
*
* Returns a printable version of +self+, enclosed in double-quotes,
* and with special characters escaped:
*
* s = "foo\tbar\tbaz\n"
* # => "foo\tbar\tbaz\n"
* s.inspect
* # => "\"foo\\tbar\\tbaz\\n\""
*
*/
VALUE
rb_str_inspect(VALUE str)
{
int encidx = ENCODING_GET(str);
rb_encoding *enc = rb_enc_from_index(encidx), *actenc;
const char *p, *pend, *prev;
char buf[CHAR_ESC_LEN + 1];
VALUE result = rb_str_buf_new(0);
rb_encoding *resenc = rb_default_internal_encoding();
int unicode_p = rb_enc_unicode_p(enc);
int asciicompat = rb_enc_asciicompat(enc);
if (resenc == NULL) resenc = rb_default_external_encoding();
if (!rb_enc_asciicompat(resenc)) resenc = rb_usascii_encoding();
rb_enc_associate(result, resenc);
str_buf_cat2(result, "\"");
p = RSTRING_PTR(str); pend = RSTRING_END(str);
prev = p;
actenc = get_actual_encoding(encidx, str);
if (actenc != enc) {
enc = actenc;
if (unicode_p) unicode_p = rb_enc_unicode_p(enc);
}
while (p < pend) {
unsigned int c, cc;
int n;
n = rb_enc_precise_mbclen(p, pend, enc);
if (!MBCLEN_CHARFOUND_P(n)) {
if (p > prev) str_buf_cat(result, prev, p - prev);
n = rb_enc_mbminlen(enc);
if (pend < p + n)
n = (int)(pend - p);
while (n--) {
snprintf(buf, CHAR_ESC_LEN, "\\x%02X", *p & 0377);
str_buf_cat(result, buf, strlen(buf));
prev = ++p;
}
continue;
}
n = MBCLEN_CHARFOUND_LEN(n);
c = rb_enc_mbc_to_codepoint(p, pend, enc);
p += n;
if ((asciicompat || unicode_p) &&
(c == '"'|| c == '\\' ||
(c == '#' &&
p < pend &&
MBCLEN_CHARFOUND_P(rb_enc_precise_mbclen(p,pend,enc)) &&
(cc = rb_enc_codepoint(p,pend,enc),
(cc == '$' || cc == '@' || cc == '{'))))) {
if (p - n > prev) str_buf_cat(result, prev, p - n - prev);
str_buf_cat2(result, "\\");
if (asciicompat || enc == resenc) {
prev = p - n;
continue;
}
}
switch (c) {
case '\n': cc = 'n'; break;
case '\r': cc = 'r'; break;
case '\t': cc = 't'; break;
case '\f': cc = 'f'; break;
case '\013': cc = 'v'; break;
case '\010': cc = 'b'; break;
case '\007': cc = 'a'; break;
case 033: cc = 'e'; break;
default: cc = 0; break;
}
if (cc) {
if (p - n > prev) str_buf_cat(result, prev, p - n - prev);
buf[0] = '\\';
buf[1] = (char)cc;
str_buf_cat(result, buf, 2);
prev = p;
continue;
}
if ((enc == resenc && rb_enc_isprint(c, enc)) ||
(asciicompat && rb_enc_isascii(c, enc) && ISPRINT(c))) {
continue;
}
else {
if (p - n > prev) str_buf_cat(result, prev, p - n - prev);
rb_str_buf_cat_escaped_char(result, c, unicode_p);
prev = p;
continue;
}
}
if (p > prev) str_buf_cat(result, prev, p - prev);
str_buf_cat2(result, "\"");
return result;
}
#define IS_EVSTR(p,e) ((p) < (e) && (*(p) == '$' || *(p) == '@' || *(p) == '{'))
/*
* call-seq:
* dump -> string
*
* Returns a printable version of +self+, enclosed in double-quotes,
* with special characters escaped, and with non-printing characters
* replaced by hexadecimal notation:
*
* "hello \n ''".dump # => "\"hello \\n ''\""
* "\f\x00\xff\\\"".dump # => "\"\\f\\x00\\xFF\\\\\\\"\""
*
* Related: String#undump (inverse of String#dump).
*
*/
VALUE
rb_str_dump(VALUE str)
{
int encidx = rb_enc_get_index(str);
rb_encoding *enc = rb_enc_from_index(encidx);
long len;
const char *p, *pend;
char *q, *qend;
VALUE result;
int u8 = (encidx == rb_utf8_encindex());
static const char nonascii_suffix[] = ".dup.force_encoding(\"%s\")";
len = 2; /* "" */
if (!rb_enc_asciicompat(enc)) {
len += strlen(nonascii_suffix) - rb_strlen_lit("%s");
len += strlen(enc->name);
}
p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str);
while (p < pend) {
int clen;
unsigned char c = *p++;
switch (c) {
case '"': case '\\':
case '\n': case '\r':
case '\t': case '\f':
case '\013': case '\010': case '\007': case '\033':
clen = 2;
break;
case '#':
clen = IS_EVSTR(p, pend) ? 2 : 1;
break;
default:
if (ISPRINT(c)) {
clen = 1;
}
else {
if (u8 && c > 0x7F) { /* \u notation */
int n = rb_enc_precise_mbclen(p-1, pend, enc);
if (MBCLEN_CHARFOUND_P(n)) {
unsigned int cc = rb_enc_mbc_to_codepoint(p-1, pend, enc);
if (cc <= 0xFFFF)
clen = 6; /* \uXXXX */
else if (cc <= 0xFFFFF)
clen = 9; /* \u{XXXXX} */
else
clen = 10; /* \u{XXXXXX} */
p += MBCLEN_CHARFOUND_LEN(n)-1;
break;
}
}
clen = 4; /* \xNN */
}
break;
}
if (clen > LONG_MAX - len) {
rb_raise(rb_eRuntimeError, "string size too big");
}
len += clen;
}
result = rb_str_new(0, len);
p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str);
q = RSTRING_PTR(result); qend = q + len + 1;
*q++ = '"';
while (p < pend) {
unsigned char c = *p++;
if (c == '"' || c == '\\') {
*q++ = '\\';
*q++ = c;
}
else if (c == '#') {
if (IS_EVSTR(p, pend)) *q++ = '\\';
*q++ = '#';
}
else if (c == '\n') {
*q++ = '\\';
*q++ = 'n';
}
else if (c == '\r') {
*q++ = '\\';
*q++ = 'r';
}
else if (c == '\t') {
*q++ = '\\';
*q++ = 't';
}
else if (c == '\f') {
*q++ = '\\';
*q++ = 'f';
}
else if (c == '\013') {
*q++ = '\\';
*q++ = 'v';
}
else if (c == '\010') {
*q++ = '\\';
*q++ = 'b';
}
else if (c == '\007') {
*q++ = '\\';
*q++ = 'a';
}
else if (c == '\033') {
*q++ = '\\';
*q++ = 'e';
}
else if (ISPRINT(c)) {
*q++ = c;
}
else {
*q++ = '\\';
if (u8) {
int n = rb_enc_precise_mbclen(p-1, pend, enc) - 1;
if (MBCLEN_CHARFOUND_P(n)) {
int cc = rb_enc_mbc_to_codepoint(p-1, pend, enc);
p += n;
if (cc <= 0xFFFF)
snprintf(q, qend-q, "u%04X", cc); /* \uXXXX */
else
snprintf(q, qend-q, "u{%X}", cc); /* \u{XXXXX} or \u{XXXXXX} */
q += strlen(q);
continue;
}
}
snprintf(q, qend-q, "x%02X", c);
q += 3;
}
}
*q++ = '"';
*q = '\0';
if (!rb_enc_asciicompat(enc)) {
snprintf(q, qend-q, nonascii_suffix, enc->name);
encidx = rb_ascii8bit_encindex();
}
/* result from dump is ASCII */
rb_enc_associate_index(result, encidx);
ENC_CODERANGE_SET(result, ENC_CODERANGE_7BIT);
return result;
}
static int
unescape_ascii(unsigned int c)
{
switch (c) {
case 'n':
return '\n';
case 'r':
return '\r';
case 't':
return '\t';
case 'f':
return '\f';
case 'v':
return '\13';
case 'b':
return '\010';
case 'a':
return '\007';
case 'e':
return 033;
}
UNREACHABLE_RETURN(-1);
}
static void
undump_after_backslash(VALUE undumped, const char **ss, const char *s_end, rb_encoding **penc, bool *utf8, bool *binary)
{
const char *s = *ss;
unsigned int c;
int codelen;
size_t hexlen;
unsigned char buf[6];
static rb_encoding *enc_utf8 = NULL;
switch (*s) {
case '\\':
case '"':
case '#':
rb_str_cat(undumped, s, 1); /* cat itself */
s++;
break;
case 'n':
case 'r':
case 't':
case 'f':
case 'v':
case 'b':
case 'a':
case 'e':
*buf = unescape_ascii(*s);
rb_str_cat(undumped, (char *)buf, 1);
s++;
break;
case 'u':
if (*binary) {
rb_raise(rb_eRuntimeError, "hex escape and Unicode escape are mixed");
}
*utf8 = true;
if (++s >= s_end) {
rb_raise(rb_eRuntimeError, "invalid Unicode escape");
}
if (enc_utf8 == NULL) enc_utf8 = rb_utf8_encoding();
if (*penc != enc_utf8) {
*penc = enc_utf8;
rb_enc_associate(undumped, enc_utf8);
}
if (*s == '{') { /* handle \u{...} form */
s++;
for (;;) {
if (s >= s_end) {
rb_raise(rb_eRuntimeError, "unterminated Unicode escape");
}
if (*s == '}') {
s++;
break;
}
if (ISSPACE(*s)) {
s++;
continue;
}
c = scan_hex(s, s_end-s, &hexlen);
if (hexlen == 0 || hexlen > 6) {
rb_raise(rb_eRuntimeError, "invalid Unicode escape");
}
if (c > 0x10ffff) {
rb_raise(rb_eRuntimeError, "invalid Unicode codepoint (too large)");
}
if (0xd800 <= c && c <= 0xdfff) {
rb_raise(rb_eRuntimeError, "invalid Unicode codepoint");
}
codelen = rb_enc_mbcput(c, (char *)buf, *penc);
rb_str_cat(undumped, (char *)buf, codelen);
s += hexlen;
}
}
else { /* handle \uXXXX form */
c = scan_hex(s, 4, &hexlen);
if (hexlen != 4) {
rb_raise(rb_eRuntimeError, "invalid Unicode escape");
}
if (0xd800 <= c && c <= 0xdfff) {
rb_raise(rb_eRuntimeError, "invalid Unicode codepoint");
}
codelen = rb_enc_mbcput(c, (char *)buf, *penc);
rb_str_cat(undumped, (char *)buf, codelen);
s += hexlen;
}
break;
case 'x':
if (*utf8) {
rb_raise(rb_eRuntimeError, "hex escape and Unicode escape are mixed");
}
*binary = true;
if (++s >= s_end) {
rb_raise(rb_eRuntimeError, "invalid hex escape");
}
*buf = scan_hex(s, 2, &hexlen);
if (hexlen != 2) {
rb_raise(rb_eRuntimeError, "invalid hex escape");
}
rb_str_cat(undumped, (char *)buf, 1);
s += hexlen;
break;
default:
rb_str_cat(undumped, s-1, 2);
s++;
}
*ss = s;
}
static VALUE rb_str_is_ascii_only_p(VALUE str);
/*
* call-seq:
* undump -> string
*
* Returns an unescaped version of +self+:
*
* s_orig = "\f\x00\xff\\\"" # => "\f\u0000\xFF\\\""
* s_dumped = s_orig.dump # => "\"\\f\\x00\\xFF\\\\\\\"\""
* s_undumped = s_dumped.undump # => "\f\u0000\xFF\\\""
* s_undumped == s_orig # => true
*
* Related: String#dump (inverse of String#undump).
*
*/
static VALUE
str_undump(VALUE str)
{
const char *s = RSTRING_PTR(str);
const char *s_end = RSTRING_END(str);
rb_encoding *enc = rb_enc_get(str);
VALUE undumped = rb_enc_str_new(s, 0L, enc);
bool utf8 = false;
bool binary = false;
int w;
rb_must_asciicompat(str);
if (rb_str_is_ascii_only_p(str) == Qfalse) {
rb_raise(rb_eRuntimeError, "non-ASCII character detected");
}
if (!str_null_check(str, &w)) {
rb_raise(rb_eRuntimeError, "string contains null byte");
}
if (RSTRING_LEN(str) < 2) goto invalid_format;
if (*s != '"') goto invalid_format;
/* strip '"' at the start */
s++;
for (;;) {
if (s >= s_end) {
rb_raise(rb_eRuntimeError, "unterminated dumped string");
}
if (*s == '"') {
/* epilogue */
s++;
if (s == s_end) {
/* ascii compatible dumped string */
break;
}
else {
static const char force_encoding_suffix[] = ".force_encoding(\""; /* "\")" */
static const char dup_suffix[] = ".dup";
const char *encname;
int encidx;
ptrdiff_t size;
/* check separately for strings dumped by older versions */
size = sizeof(dup_suffix) - 1;
if (s_end - s > size && memcmp(s, dup_suffix, size) == 0) s += size;
size = sizeof(force_encoding_suffix) - 1;
if (s_end - s <= size) goto invalid_format;
if (memcmp(s, force_encoding_suffix, size) != 0) goto invalid_format;
s += size;
if (utf8) {
rb_raise(rb_eRuntimeError, "dumped string contained Unicode escape but used force_encoding");
}
encname = s;
s = memchr(s, '"', s_end-s);
size = s - encname;
if (!s) goto invalid_format;
if (s_end - s != 2) goto invalid_format;
if (s[0] != '"' || s[1] != ')') goto invalid_format;
encidx = rb_enc_find_index2(encname, (long)size);
if (encidx < 0) {
rb_raise(rb_eRuntimeError, "dumped string has unknown encoding name");
}
rb_enc_associate_index(undumped, encidx);
}
break;
}
if (*s == '\\') {
s++;
if (s >= s_end) {
rb_raise(rb_eRuntimeError, "invalid escape");
}
undump_after_backslash(undumped, &s, s_end, &enc, &utf8, &binary);
}
else {
rb_str_cat(undumped, s++, 1);
}
}
return undumped;
invalid_format:
rb_raise(rb_eRuntimeError, "invalid dumped string; not wrapped with '\"' nor '\"...\".force_encoding(\"...\")' form");
}
static void
rb_str_check_dummy_enc(rb_encoding *enc)
{
if (rb_enc_dummy_p(enc)) {
rb_raise(rb_eEncCompatError, "incompatible encoding with this operation: %s",
rb_enc_name(enc));
}
}
static rb_encoding *
str_true_enc(VALUE str)
{
rb_encoding *enc = STR_ENC_GET(str);
rb_str_check_dummy_enc(enc);
return enc;
}
static OnigCaseFoldType
check_case_options(int argc, VALUE *argv, OnigCaseFoldType flags)
{
if (argc==0)
return flags;
if (argc>2)
rb_raise(rb_eArgError, "too many options");
if (argv[0]==sym_turkic) {
flags |= ONIGENC_CASE_FOLD_TURKISH_AZERI;
if (argc==2) {
if (argv[1]==sym_lithuanian)
flags |= ONIGENC_CASE_FOLD_LITHUANIAN;
else
rb_raise(rb_eArgError, "invalid second option");
}
}
else if (argv[0]==sym_lithuanian) {
flags |= ONIGENC_CASE_FOLD_LITHUANIAN;
if (argc==2) {
if (argv[1]==sym_turkic)
flags |= ONIGENC_CASE_FOLD_TURKISH_AZERI;
else
rb_raise(rb_eArgError, "invalid second option");
}
}
else if (argc>1)
rb_raise(rb_eArgError, "too many options");
else if (argv[0]==sym_ascii)
flags |= ONIGENC_CASE_ASCII_ONLY;
else if (argv[0]==sym_fold) {
if ((flags & (ONIGENC_CASE_UPCASE|ONIGENC_CASE_DOWNCASE)) == ONIGENC_CASE_DOWNCASE)
flags ^= ONIGENC_CASE_FOLD|ONIGENC_CASE_DOWNCASE;
else
rb_raise(rb_eArgError, "option :fold only allowed for downcasing");
}
else
rb_raise(rb_eArgError, "invalid option");
return flags;
}
static inline bool
case_option_single_p(OnigCaseFoldType flags, rb_encoding *enc, VALUE str)
{
if ((flags & ONIGENC_CASE_ASCII_ONLY) && (enc==rb_utf8_encoding() || rb_enc_mbmaxlen(enc) == 1))
return true;
return !(flags & ONIGENC_CASE_FOLD_TURKISH_AZERI) && ENC_CODERANGE(str) == ENC_CODERANGE_7BIT;
}
/* 16 should be long enough to absorb any kind of single character length increase */
#define CASE_MAPPING_ADDITIONAL_LENGTH 20
#ifndef CASEMAP_DEBUG
# define CASEMAP_DEBUG 0
#endif
struct mapping_buffer;
typedef struct mapping_buffer {
size_t capa;
size_t used;
struct mapping_buffer *next;
OnigUChar space[FLEX_ARY_LEN];
} mapping_buffer;
static void
mapping_buffer_free(void *p)
{
mapping_buffer *previous_buffer;
mapping_buffer *current_buffer = p;
while (current_buffer) {
previous_buffer = current_buffer;
current_buffer = current_buffer->next;
ruby_sized_xfree(previous_buffer, previous_buffer->capa);
}
}
static const rb_data_type_t mapping_buffer_type = {
"mapping_buffer",
{0, mapping_buffer_free,}
};
static VALUE
rb_str_casemap(VALUE source, OnigCaseFoldType *flags, rb_encoding *enc)
{
VALUE target;
const OnigUChar *source_current, *source_end;
int target_length = 0;
VALUE buffer_anchor;
mapping_buffer *current_buffer = 0;
mapping_buffer **pre_buffer;
size_t buffer_count = 0;
int buffer_length_or_invalid;
if (RSTRING_LEN(source) == 0) return str_duplicate(rb_cString, source);
source_current = (OnigUChar*)RSTRING_PTR(source);
source_end = (OnigUChar*)RSTRING_END(source);
buffer_anchor = TypedData_Wrap_Struct(0, &mapping_buffer_type, 0);
pre_buffer = (mapping_buffer **)&DATA_PTR(buffer_anchor);
while (source_current < source_end) {
/* increase multiplier using buffer count to converge quickly */
size_t capa = (size_t)(source_end-source_current)*++buffer_count + CASE_MAPPING_ADDITIONAL_LENGTH;
if (CASEMAP_DEBUG) {
fprintf(stderr, "Buffer allocation, capa is %"PRIuSIZE"\n", capa); /* for tuning */
}
current_buffer = xmalloc(offsetof(mapping_buffer, space) + capa);
*pre_buffer = current_buffer;
pre_buffer = &current_buffer->next;
current_buffer->next = NULL;
current_buffer->capa = capa;
buffer_length_or_invalid = enc->case_map(flags,
&source_current, source_end,
current_buffer->space,
current_buffer->space+current_buffer->capa,
enc);
if (buffer_length_or_invalid < 0) {
current_buffer = DATA_PTR(buffer_anchor);
DATA_PTR(buffer_anchor) = 0;
mapping_buffer_free(current_buffer);
rb_raise(rb_eArgError, "input string invalid");
}
target_length += current_buffer->used = buffer_length_or_invalid;
}
if (CASEMAP_DEBUG) {
fprintf(stderr, "Buffer count is %"PRIuSIZE"\n", buffer_count); /* for tuning */
}
if (buffer_count==1) {
target = rb_str_new((const char*)current_buffer->space, target_length);
}
else {
char *target_current;
target = rb_str_new(0, target_length);
target_current = RSTRING_PTR(target);
current_buffer = DATA_PTR(buffer_anchor);
while (current_buffer) {
memcpy(target_current, current_buffer->space, current_buffer->used);
target_current += current_buffer->used;
current_buffer = current_buffer->next;
}
}
current_buffer = DATA_PTR(buffer_anchor);
DATA_PTR(buffer_anchor) = 0;
mapping_buffer_free(current_buffer);
/* TODO: check about string terminator character */
str_enc_copy(target, source);
/*ENC_CODERANGE_SET(mapped, cr);*/
return target;
}
static VALUE
rb_str_ascii_casemap(VALUE source, VALUE target, OnigCaseFoldType *flags, rb_encoding *enc)
{
const OnigUChar *source_current, *source_end;
OnigUChar *target_current, *target_end;
long old_length = RSTRING_LEN(source);
int length_or_invalid;
if (old_length == 0) return Qnil;
source_current = (OnigUChar*)RSTRING_PTR(source);
source_end = (OnigUChar*)RSTRING_END(source);
if (source == target) {
target_current = (OnigUChar*)source_current;
target_end = (OnigUChar*)source_end;
}
else {
target_current = (OnigUChar*)RSTRING_PTR(target);
target_end = (OnigUChar*)RSTRING_END(target);
}
length_or_invalid = onigenc_ascii_only_case_map(flags,
&source_current, source_end,
target_current, target_end, enc);
if (length_or_invalid < 0)
rb_raise(rb_eArgError, "input string invalid");
if (CASEMAP_DEBUG && length_or_invalid != old_length) {
fprintf(stderr, "problem with rb_str_ascii_casemap"
"; old_length=%ld, new_length=%d\n", old_length, length_or_invalid);
rb_raise(rb_eArgError, "internal problem with rb_str_ascii_casemap"
"; old_length=%ld, new_length=%d\n", old_length, length_or_invalid);
}
str_enc_copy(target, source);
return target;
}
static bool
upcase_single(VALUE str)
{
char *s = RSTRING_PTR(str), *send = RSTRING_END(str);
bool modified = false;
while (s < send) {
unsigned int c = *(unsigned char*)s;
if ('a' <= c && c <= 'z') {
*s = 'A' + (c - 'a');
modified = true;
}
s++;
}
return modified;
}
/*
* call-seq:
* upcase!(*options) -> self or nil
*
* Upcases the characters in +self+;
* returns +self+ if any changes were made, +nil+ otherwise:
*
* s = 'Hello World!' # => "Hello World!"
* s.upcase! # => "HELLO WORLD!"
* s # => "HELLO WORLD!"
* s.upcase! # => nil
*
* The casing may be affected by the given +options+;
* see {Case Mapping}[doc/case_mapping_rdoc.html].
*
* Related: String#upcase, String#downcase, String#downcase!.
*
*/
static VALUE
rb_str_upcase_bang(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
OnigCaseFoldType flags = ONIGENC_CASE_UPCASE;
flags = check_case_options(argc, argv, flags);
str_modify_keep_cr(str);
enc = str_true_enc(str);
if (case_option_single_p(flags, enc, str)) {
if (upcase_single(str))
flags |= ONIGENC_CASE_MODIFIED;
}
else if (flags&ONIGENC_CASE_ASCII_ONLY)
rb_str_ascii_casemap(str, str, &flags, enc);
else
str_shared_replace(str, rb_str_casemap(str, &flags, enc));
if (ONIGENC_CASE_MODIFIED&flags) return str;
return Qnil;
}
/*
* call-seq:
* upcase(*options) -> string
*
* Returns a string containing the upcased characters in +self+:
*
* s = 'Hello World!' # => "Hello World!"
* s.upcase # => "HELLO WORLD!"
*
* The casing may be affected by the given +options+;
* see {Case Mapping}[doc/case_mapping_rdoc.html].
*
* Related: String#upcase!, String#downcase, String#downcase!.
*
*/
static VALUE
rb_str_upcase(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
OnigCaseFoldType flags = ONIGENC_CASE_UPCASE;
VALUE ret;
flags = check_case_options(argc, argv, flags);
enc = str_true_enc(str);
if (case_option_single_p(flags, enc, str)) {
ret = rb_str_new(RSTRING_PTR(str), RSTRING_LEN(str));
str_enc_copy(ret, str);
upcase_single(ret);
}
else if (flags&ONIGENC_CASE_ASCII_ONLY) {
ret = rb_str_new(0, RSTRING_LEN(str));
rb_str_ascii_casemap(str, ret, &flags, enc);
}
else {
ret = rb_str_casemap(str, &flags, enc);
}
return ret;
}
static bool
downcase_single(VALUE str)
{
char *s = RSTRING_PTR(str), *send = RSTRING_END(str);
bool modified = false;
while (s < send) {
unsigned int c = *(unsigned char*)s;
if ('A' <= c && c <= 'Z') {
*s = 'a' + (c - 'A');
modified = true;
}
s++;
}
return modified;
}
/*
* call-seq:
* downcase!(*options) -> self or nil
*
* Downcases the characters in +self+;
* returns +self+ if any changes were made, +nil+ otherwise:
*
* s = 'Hello World!' # => "Hello World!"
* s.downcase! # => "hello world!"
* s # => "hello world!"
* s.downcase! # => nil
*
* The casing may be affected by the given +options+;
* see {Case Mapping}[doc/case_mapping_rdoc.html].
*
* Related: String#downcase, String#upcase, String#upcase!.
*
*/
static VALUE
rb_str_downcase_bang(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
OnigCaseFoldType flags = ONIGENC_CASE_DOWNCASE;
flags = check_case_options(argc, argv, flags);
str_modify_keep_cr(str);
enc = str_true_enc(str);
if (case_option_single_p(flags, enc, str)) {
if (downcase_single(str))
flags |= ONIGENC_CASE_MODIFIED;
}
else if (flags&ONIGENC_CASE_ASCII_ONLY)
rb_str_ascii_casemap(str, str, &flags, enc);
else
str_shared_replace(str, rb_str_casemap(str, &flags, enc));
if (ONIGENC_CASE_MODIFIED&flags) return str;
return Qnil;
}
/*
* call-seq:
* downcase(*options) -> string
*
* Returns a string containing the downcased characters in +self+:
*
* s = 'Hello World!' # => "Hello World!"
* s.downcase # => "hello world!"
*
* The casing may be affected by the given +options+;
* see {Case Mapping}[doc/case_mapping_rdoc.html].
*
* Related: String#downcase!, String#upcase, String#upcase!.
*
*/
static VALUE
rb_str_downcase(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
OnigCaseFoldType flags = ONIGENC_CASE_DOWNCASE;
VALUE ret;
flags = check_case_options(argc, argv, flags);
enc = str_true_enc(str);
if (case_option_single_p(flags, enc, str)) {
ret = rb_str_new(RSTRING_PTR(str), RSTRING_LEN(str));
str_enc_copy(ret, str);
downcase_single(ret);
}
else if (flags&ONIGENC_CASE_ASCII_ONLY) {
ret = rb_str_new(0, RSTRING_LEN(str));
rb_str_ascii_casemap(str, ret, &flags, enc);
}
else {
ret = rb_str_casemap(str, &flags, enc);
}
return ret;
}
/*
* call-seq:
* capitalize!(*options) -> self or nil
*
* Upcases the first character in +self+;
* downcases the remaining characters;
* returns +self+ if any changes were made, +nil+ otherwise:
*
* s = 'hello World!' # => "hello World!"
* s.capitalize! # => "Hello world!"
* s # => "Hello world!"
* s.capitalize! # => nil
*
* The casing may be affected by the given +options+;
* see {Case Mapping}[doc/case_mapping_rdoc.html].
*
* Related: String#capitalize.
*
*/
static VALUE
rb_str_capitalize_bang(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
OnigCaseFoldType flags = ONIGENC_CASE_UPCASE | ONIGENC_CASE_TITLECASE;
flags = check_case_options(argc, argv, flags);
str_modify_keep_cr(str);
enc = str_true_enc(str);
if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return Qnil;
if (flags&ONIGENC_CASE_ASCII_ONLY)
rb_str_ascii_casemap(str, str, &flags, enc);
else
str_shared_replace(str, rb_str_casemap(str, &flags, enc));
if (ONIGENC_CASE_MODIFIED&flags) return str;
return Qnil;
}
/*
* call-seq:
* capitalize(*options) -> string
*
* Returns a string containing the characters in +self+;
* the first character is upcased;
* the remaining characters are downcased:
*
* s = 'hello World!' # => "hello World!"
* s.capitalize # => "Hello world!"
*
* The casing may be affected by the given +options+;
* see {Case Mapping}[doc/case_mapping_rdoc.html].
*
* Related: String#capitalize!.
*
*/
static VALUE
rb_str_capitalize(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
OnigCaseFoldType flags = ONIGENC_CASE_UPCASE | ONIGENC_CASE_TITLECASE;
VALUE ret;
flags = check_case_options(argc, argv, flags);
enc = str_true_enc(str);
if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return str;
if (flags&ONIGENC_CASE_ASCII_ONLY) {
ret = rb_str_new(0, RSTRING_LEN(str));
rb_str_ascii_casemap(str, ret, &flags, enc);
}
else {
ret = rb_str_casemap(str, &flags, enc);
}
return ret;
}
/*
* call-seq:
* swapcase!(*options) -> self or nil
*
* Upcases each lowercase character in +self+;
* downcases uppercase character;
* returns +self+ if any changes were made, +nil+ otherwise:
*
* s = 'Hello World!' # => "Hello World!"
* s.swapcase! # => "hELLO wORLD!"
* s # => "Hello World!"
* ''.swapcase! # => nil
*
* The casing may be affected by the given +options+;
* see {Case Mapping}[doc/case_mapping_rdoc.html].
*
* Related: String#swapcase.
*
*/
static VALUE
rb_str_swapcase_bang(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
OnigCaseFoldType flags = ONIGENC_CASE_UPCASE | ONIGENC_CASE_DOWNCASE;
flags = check_case_options(argc, argv, flags);
str_modify_keep_cr(str);
enc = str_true_enc(str);
if (flags&ONIGENC_CASE_ASCII_ONLY)
rb_str_ascii_casemap(str, str, &flags, enc);
else
str_shared_replace(str, rb_str_casemap(str, &flags, enc));
if (ONIGENC_CASE_MODIFIED&flags) return str;
return Qnil;
}
/*
* call-seq:
* swapcase(*options) -> string
*
* Returns a string containing the characters in +self+, with cases reversed;
* each uppercase character is downcased;
* each lowercase character is upcased:
*
* s = 'Hello World!' # => "Hello World!"
* s.swapcase # => "hELLO wORLD!"
*
* The casing may be affected by the given +options+;
* see {Case Mapping}[doc/case_mapping_rdoc.html].
*
* Related: String#swapcase!.
*
*/
static VALUE
rb_str_swapcase(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
OnigCaseFoldType flags = ONIGENC_CASE_UPCASE | ONIGENC_CASE_DOWNCASE;
VALUE ret;
flags = check_case_options(argc, argv, flags);
enc = str_true_enc(str);
if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return str_duplicate(rb_cString, str);
if (flags&ONIGENC_CASE_ASCII_ONLY) {
ret = rb_str_new(0, RSTRING_LEN(str));
rb_str_ascii_casemap(str, ret, &flags, enc);
}
else {
ret = rb_str_casemap(str, &flags, enc);
}
return ret;
}
typedef unsigned char *USTR;
struct tr {
int gen;
unsigned int now, max;
char *p, *pend;
};
static unsigned int
trnext(struct tr *t, rb_encoding *enc)
{
int n;
for (;;) {
nextpart:
if (!t->gen) {
if (t->p == t->pend) return -1;
if (rb_enc_ascget(t->p, t->pend, &n, enc) == '\\' && t->p + n < t->pend) {
t->p += n;
}
t->now = rb_enc_codepoint_len(t->p, t->pend, &n, enc);
t->p += n;
if (rb_enc_ascget(t->p, t->pend, &n, enc) == '-' && t->p + n < t->pend) {
t->p += n;
if (t->p < t->pend) {
unsigned int c = rb_enc_codepoint_len(t->p, t->pend, &n, enc);
t->p += n;
if (t->now > c) {
if (t->now < 0x80 && c < 0x80) {
rb_raise(rb_eArgError,
"invalid range \"%c-%c\" in string transliteration",
t->now, c);
}
else {
rb_raise(rb_eArgError, "invalid range in string transliteration");
}
continue; /* not reached */
}
t->gen = 1;
t->max = c;
}
}
return t->now;
}
else {
while (ONIGENC_CODE_TO_MBCLEN(enc, ++t->now) <= 0) {
if (t->now == t->max) {
t->gen = 0;
goto nextpart;
}
}
if (t->now < t->max) {
return t->now;
}
else {
t->gen = 0;
return t->max;
}
}
}
}
static VALUE rb_str_delete_bang(int,VALUE*,VALUE);
static VALUE
tr_trans(VALUE str, VALUE src, VALUE repl, int sflag)
{
const unsigned int errc = -1;
unsigned int trans[256];
rb_encoding *enc, *e1, *e2;
struct tr trsrc, trrepl;
int cflag = 0;
unsigned int c, c0, last = 0;
int modify = 0, i, l;
unsigned char *s, *send;
VALUE hash = 0;
int singlebyte = single_byte_optimizable(str);
int termlen;
int cr;
#define CHECK_IF_ASCII(c) \
(void)((cr == ENC_CODERANGE_7BIT && !rb_isascii(c)) ? \
(cr = ENC_CODERANGE_VALID) : 0)
StringValue(src);
StringValue(repl);
if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return Qnil;
if (RSTRING_LEN(repl) == 0) {
return rb_str_delete_bang(1, &src, str);
}
cr = ENC_CODERANGE(str);
e1 = rb_enc_check(str, src);
e2 = rb_enc_check(str, repl);
if (e1 == e2) {
enc = e1;
}
else {
enc = rb_enc_check(src, repl);
}
trsrc.p = RSTRING_PTR(src); trsrc.pend = trsrc.p + RSTRING_LEN(src);
if (RSTRING_LEN(src) > 1 &&
rb_enc_ascget(trsrc.p, trsrc.pend, &l, enc) == '^' &&
trsrc.p + l < trsrc.pend) {
cflag = 1;
trsrc.p += l;
}
trrepl.p = RSTRING_PTR(repl);
trrepl.pend = trrepl.p + RSTRING_LEN(repl);
trsrc.gen = trrepl.gen = 0;
trsrc.now = trrepl.now = 0;
trsrc.max = trrepl.max = 0;
if (cflag) {
for (i=0; i<256; i++) {
trans[i] = 1;
}
while ((c = trnext(&trsrc, enc)) != errc) {
if (c < 256) {
trans[c] = errc;
}
else {
if (!hash) hash = rb_hash_new();
rb_hash_aset(hash, UINT2NUM(c), Qtrue);
}
}
while ((c = trnext(&trrepl, enc)) != errc)
/* retrieve last replacer */;
last = trrepl.now;
for (i=0; i<256; i++) {
if (trans[i] != errc) {
trans[i] = last;
}
}
}
else {
unsigned int r;
for (i=0; i<256; i++) {
trans[i] = errc;
}
while ((c = trnext(&trsrc, enc)) != errc) {
r = trnext(&trrepl, enc);
if (r == errc) r = trrepl.now;
if (c < 256) {
trans[c] = r;
if (rb_enc_codelen(r, enc) != 1) singlebyte = 0;
}
else {
if (!hash) hash = rb_hash_new();
rb_hash_aset(hash, UINT2NUM(c), UINT2NUM(r));
}
}
}
if (cr == ENC_CODERANGE_VALID && rb_enc_asciicompat(e1))
cr = ENC_CODERANGE_7BIT;
str_modify_keep_cr(str);
s = (unsigned char *)RSTRING_PTR(str); send = (unsigned char *)RSTRING_END(str);
termlen = rb_enc_mbminlen(enc);
if (sflag) {
int clen, tlen;
long offset, max = RSTRING_LEN(str);
unsigned int save = -1;
unsigned char *buf = ALLOC_N(unsigned char, max + termlen), *t = buf;
while (s < send) {
int may_modify = 0;
c0 = c = rb_enc_codepoint_len((char *)s, (char *)send, &clen, e1);
tlen = enc == e1 ? clen : rb_enc_codelen(c, enc);
s += clen;
if (c < 256) {
c = trans[c];
}
else if (hash) {
VALUE tmp = rb_hash_lookup(hash, UINT2NUM(c));
if (NIL_P(tmp)) {
if (cflag) c = last;
else c = errc;
}
else if (cflag) c = errc;
else c = NUM2INT(tmp);
}
else {
c = errc;
}
if (c != (unsigned int)-1) {
if (save == c) {
CHECK_IF_ASCII(c);
continue;
}
save = c;
tlen = rb_enc_codelen(c, enc);
modify = 1;
}
else {
save = -1;
c = c0;
if (enc != e1) may_modify = 1;
}
if ((offset = t - buf) + tlen > max) {
size_t MAYBE_UNUSED(old) = max + termlen;
max = offset + tlen + (send - s);
SIZED_REALLOC_N(buf, unsigned char, max + termlen, old);
t = buf + offset;
}
rb_enc_mbcput(c, t, enc);
if (may_modify && memcmp(s, t, tlen) != 0) {
modify = 1;
}
CHECK_IF_ASCII(c);
t += tlen;
}
if (!STR_EMBED_P(str)) {
ruby_sized_xfree(STR_HEAP_PTR(str), STR_HEAP_SIZE(str));
}
TERM_FILL((char *)t, termlen);
RSTRING(str)->as.heap.ptr = (char *)buf;
RSTRING(str)->as.heap.len = t - buf;
STR_SET_NOEMBED(str);
RSTRING(str)->as.heap.aux.capa = max;
}
else if (rb_enc_mbmaxlen(enc) == 1 || (singlebyte && !hash)) {
while (s < send) {
c = (unsigned char)*s;
if (trans[c] != errc) {
if (!cflag) {
c = trans[c];
*s = c;
modify = 1;
}
else {
*s = last;
modify = 1;
}
}
CHECK_IF_ASCII(c);
s++;
}
}
else {
int clen, tlen;
long offset, max = (long)((send - s) * 1.2);
unsigned char *buf = ALLOC_N(unsigned char, max + termlen), *t = buf;
while (s < send) {
int may_modify = 0;
c0 = c = rb_enc_codepoint_len((char *)s, (char *)send, &clen, e1);
tlen = enc == e1 ? clen : rb_enc_codelen(c, enc);
if (c < 256) {
c = trans[c];
}
else if (hash) {
VALUE tmp = rb_hash_lookup(hash, UINT2NUM(c));
if (NIL_P(tmp)) {
if (cflag) c = last;
else c = errc;
}
else if (cflag) c = errc;
else c = NUM2INT(tmp);
}
else {
c = cflag ? last : errc;
}
if (c != errc) {
tlen = rb_enc_codelen(c, enc);
modify = 1;
}
else {
c = c0;
if (enc != e1) may_modify = 1;
}
if ((offset = t - buf) + tlen > max) {
size_t MAYBE_UNUSED(old) = max + termlen;
max = offset + tlen + (long)((send - s) * 1.2);
SIZED_REALLOC_N(buf, unsigned char, max + termlen, old);
t = buf + offset;
}
if (s != t) {
rb_enc_mbcput(c, t, enc);
if (may_modify && memcmp(s, t, tlen) != 0) {
modify = 1;
}
}
CHECK_IF_ASCII(c);
s += clen;
t += tlen;
}
if (!STR_EMBED_P(str)) {
ruby_sized_xfree(STR_HEAP_PTR(str), STR_HEAP_SIZE(str));
}
TERM_FILL((char *)t, termlen);
RSTRING(str)->as.heap.ptr = (char *)buf;
RSTRING(str)->as.heap.len = t - buf;
STR_SET_NOEMBED(str);
RSTRING(str)->as.heap.aux.capa = max;
}
if (modify) {
if (cr != ENC_CODERANGE_BROKEN)
ENC_CODERANGE_SET(str, cr);
rb_enc_associate(str, enc);
return str;
}
return Qnil;
}
/*
* call-seq:
* str.tr!(from_str, to_str) -> str or nil
*
* Translates <i>str</i> in place, using the same rules as
* String#tr. Returns <i>str</i>, or <code>nil</code> if no changes
* were made.
*/
static VALUE
rb_str_tr_bang(VALUE str, VALUE src, VALUE repl)
{
return tr_trans(str, src, repl, 0);
}
/*
* call-seq:
* str.tr(from_str, to_str) => new_str
*
* Returns a copy of +str+ with the characters in +from_str+ replaced by the
* corresponding characters in +to_str+. If +to_str+ is shorter than
* +from_str+, it is padded with its last character in order to maintain the
* correspondence.
*
* "hello".tr('el', 'ip') #=> "hippo"
* "hello".tr('aeiou', '*') #=> "h*ll*"
* "hello".tr('aeiou', 'AA*') #=> "hAll*"
*
* Both strings may use the <code>c1-c2</code> notation to denote ranges of
* characters, and +from_str+ may start with a <code>^</code>, which denotes
* all characters except those listed.
*
* "hello".tr('a-y', 'b-z') #=> "ifmmp"
* "hello".tr('^aeiou', '*') #=> "*e**o"
*
* The backslash character <code>\\</code> can be used to escape
* <code>^</code> or <code>-</code> and is otherwise ignored unless it
* appears at the end of a range or the end of the +from_str+ or +to_str+:
*
* "hello^world".tr("\\^aeiou", "*") #=> "h*ll**w*rld"
* "hello-world".tr("a\\-eo", "*") #=> "h*ll**w*rld"
*
* "hello\r\nworld".tr("\r", "") #=> "hello\nworld"
* "hello\r\nworld".tr("\\r", "") #=> "hello\r\nwold"
* "hello\r\nworld".tr("\\\r", "") #=> "hello\nworld"
*
* "X['\\b']".tr("X\\", "") #=> "['b']"
* "X['\\b']".tr("X-\\]", "") #=> "'b'"
*/
static VALUE
rb_str_tr(VALUE str, VALUE src, VALUE repl)
{
str = str_duplicate(rb_cString, str);
tr_trans(str, src, repl, 0);
return str;
}
#define TR_TABLE_MAX (UCHAR_MAX+1)
#define TR_TABLE_SIZE (TR_TABLE_MAX+1)
static void
tr_setup_table(VALUE str, char stable[TR_TABLE_SIZE], int first,
VALUE *tablep, VALUE *ctablep, rb_encoding *enc)
{
const unsigned int errc = -1;
char buf[TR_TABLE_MAX];
struct tr tr;
unsigned int c;
VALUE table = 0, ptable = 0;
int i, l, cflag = 0;
tr.p = RSTRING_PTR(str); tr.pend = tr.p + RSTRING_LEN(str);
tr.gen = tr.now = tr.max = 0;
if (RSTRING_LEN(str) > 1 && rb_enc_ascget(tr.p, tr.pend, &l, enc) == '^') {
cflag = 1;
tr.p += l;
}
if (first) {
for (i=0; i<TR_TABLE_MAX; i++) {
stable[i] = 1;
}
stable[TR_TABLE_MAX] = cflag;
}
else if (stable[TR_TABLE_MAX] && !cflag) {
stable[TR_TABLE_MAX] = 0;
}
for (i=0; i<TR_TABLE_MAX; i++) {
buf[i] = cflag;
}
while ((c = trnext(&tr, enc)) != errc) {
if (c < TR_TABLE_MAX) {
buf[(unsigned char)c] = !cflag;
}
else {
VALUE key = UINT2NUM(c);
if (!table && (first || *tablep || stable[TR_TABLE_MAX])) {
if (cflag) {
ptable = *ctablep;
table = ptable ? ptable : rb_hash_new();
*ctablep = table;
}
else {
table = rb_hash_new();
ptable = *tablep;
*tablep = table;
}
}
if (table && (!ptable || (cflag ^ !NIL_P(rb_hash_aref(ptable, key))))) {
rb_hash_aset(table, key, Qtrue);
}
}
}
for (i=0; i<TR_TABLE_MAX; i++) {
stable[i] = stable[i] && buf[i];
}
if (!table && !cflag) {
*tablep = 0;
}
}
static int
tr_find(unsigned int c, const char table[TR_TABLE_SIZE], VALUE del, VALUE nodel)
{
if (c < TR_TABLE_MAX) {
return table[c] != 0;
}
else {
VALUE v = UINT2NUM(c);
if (del) {
if (!NIL_P(rb_hash_lookup(del, v)) &&
(!nodel || NIL_P(rb_hash_lookup(nodel, v)))) {
return TRUE;
}
}
else if (nodel && !NIL_P(rb_hash_lookup(nodel, v))) {
return FALSE;
}
return table[TR_TABLE_MAX] ? TRUE : FALSE;
}
}
/*
* call-seq:
* str.delete!([other_str]+) -> str or nil
*
* Performs a <code>delete</code> operation in place, returning <i>str</i>, or
* <code>nil</code> if <i>str</i> was not modified.
*/
static VALUE
rb_str_delete_bang(int argc, VALUE *argv, VALUE str)
{
char squeez[TR_TABLE_SIZE];
rb_encoding *enc = 0;
char *s, *send, *t;
VALUE del = 0, nodel = 0;
int modify = 0;
int i, ascompat, cr;
if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return Qnil;
rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);
for (i=0; i<argc; i++) {
VALUE s = argv[i];
StringValue(s);
enc = rb_enc_check(str, s);
tr_setup_table(s, squeez, i==0, &del, &nodel, enc);
}
str_modify_keep_cr(str);
ascompat = rb_enc_asciicompat(enc);
s = t = RSTRING_PTR(str);
send = RSTRING_END(str);
cr = ascompat ? ENC_CODERANGE_7BIT : ENC_CODERANGE_VALID;
while (s < send) {
unsigned int c;
int clen;
if (ascompat && (c = *(unsigned char*)s) < 0x80) {
if (squeez[c]) {
modify = 1;
}
else {
if (t != s) *t = c;
t++;
}
s++;
}
else {
c = rb_enc_codepoint_len(s, send, &clen, enc);
if (tr_find(c, squeez, del, nodel)) {
modify = 1;
}
else {
if (t != s) rb_enc_mbcput(c, t, enc);
t += clen;
if (cr == ENC_CODERANGE_7BIT) cr = ENC_CODERANGE_VALID;
}
s += clen;
}
}
TERM_FILL(t, TERM_LEN(str));
STR_SET_LEN(str, t - RSTRING_PTR(str));
ENC_CODERANGE_SET(str, cr);
if (modify) return str;
return Qnil;
}
/*
* call-seq:
* str.delete([other_str]+) -> new_str
*
* Returns a copy of <i>str</i> with all characters in the intersection of its
* arguments deleted. Uses the same rules for building the set of characters as
* String#count.
*
* "hello".delete "l","lo" #=> "heo"
* "hello".delete "lo" #=> "he"
* "hello".delete "aeiou", "^e" #=> "hell"
* "hello".delete "ej-m" #=> "ho"
*/
static VALUE
rb_str_delete(int argc, VALUE *argv, VALUE str)
{
str = str_duplicate(rb_cString, str);
rb_str_delete_bang(argc, argv, str);
return str;
}
/*
* call-seq:
* str.squeeze!([other_str]*) -> str or nil
*
* Squeezes <i>str</i> in place, returning either <i>str</i>, or
* <code>nil</code> if no changes were made.
*/
static VALUE
rb_str_squeeze_bang(int argc, VALUE *argv, VALUE str)
{
char squeez[TR_TABLE_SIZE];
rb_encoding *enc = 0;
VALUE del = 0, nodel = 0;
unsigned char *s, *send, *t;
int i, modify = 0;
int ascompat, singlebyte = single_byte_optimizable(str);
unsigned int save;
if (argc == 0) {
enc = STR_ENC_GET(str);
}
else {
for (i=0; i<argc; i++) {
VALUE s = argv[i];
StringValue(s);
enc = rb_enc_check(str, s);
if (singlebyte && !single_byte_optimizable(s))
singlebyte = 0;
tr_setup_table(s, squeez, i==0, &del, &nodel, enc);
}
}
str_modify_keep_cr(str);
s = t = (unsigned char *)RSTRING_PTR(str);
if (!s || RSTRING_LEN(str) == 0) return Qnil;
send = (unsigned char *)RSTRING_END(str);
save = -1;
ascompat = rb_enc_asciicompat(enc);
if (singlebyte) {
while (s < send) {
unsigned int c = *s++;
if (c != save || (argc > 0 && !squeez[c])) {
*t++ = save = c;
}
}
}
else {
while (s < send) {
unsigned int c;
int clen;
if (ascompat && (c = *s) < 0x80) {
if (c != save || (argc > 0 && !squeez[c])) {
*t++ = save = c;
}
s++;
}
else {
c = rb_enc_codepoint_len((char *)s, (char *)send, &clen, enc);
if (c != save || (argc > 0 && !tr_find(c, squeez, del, nodel))) {
if (t != s) rb_enc_mbcput(c, t, enc);
save = c;
t += clen;
}
s += clen;
}
}
}
TERM_FILL((char *)t, TERM_LEN(str));
if ((char *)t - RSTRING_PTR(str) != RSTRING_LEN(str)) {
STR_SET_LEN(str, (char *)t - RSTRING_PTR(str));
modify = 1;
}
if (modify) return str;
return Qnil;
}
/*
* call-seq:
* str.squeeze([other_str]*) -> new_str
*
* Builds a set of characters from the <i>other_str</i> parameter(s)
* using the procedure described for String#count. Returns a new
* string where runs of the same character that occur in this set are
* replaced by a single character. If no arguments are given, all
* runs of identical characters are replaced by a single character.
*
* "yellow moon".squeeze #=> "yelow mon"
* " now is the".squeeze(" ") #=> " now is the"
* "putters shoot balls".squeeze("m-z") #=> "puters shot balls"
*/
static VALUE
rb_str_squeeze(int argc, VALUE *argv, VALUE str)
{
str = str_duplicate(rb_cString, str);
rb_str_squeeze_bang(argc, argv, str);
return str;
}
/*
* call-seq:
* str.tr_s!(from_str, to_str) -> str or nil
*
* Performs String#tr_s processing on <i>str</i> in place,
* returning <i>str</i>, or <code>nil</code> if no changes were made.
*/
static VALUE
rb_str_tr_s_bang(VALUE str, VALUE src, VALUE repl)
{
return tr_trans(str, src, repl, 1);
}
/*
* call-seq:
* str.tr_s(from_str, to_str) -> new_str
*
* Processes a copy of <i>str</i> as described under String#tr, then
* removes duplicate characters in regions that were affected by the
* translation.
*
* "hello".tr_s('l', 'r') #=> "hero"
* "hello".tr_s('el', '*') #=> "h*o"
* "hello".tr_s('el', 'hx') #=> "hhxo"
*/
static VALUE
rb_str_tr_s(VALUE str, VALUE src, VALUE repl)
{
str = str_duplicate(rb_cString, str);
tr_trans(str, src, repl, 1);
return str;
}
/*
* call-seq:
* str.count([other_str]+) -> integer
*
* Each +other_str+ parameter defines a set of characters to count. The
* intersection of these sets defines the characters to count in +str+. Any
* +other_str+ that starts with a caret <code>^</code> is negated. The
* sequence <code>c1-c2</code> means all characters between c1 and c2. The
* backslash character <code>\\</code> can be used to escape <code>^</code> or
* <code>-</code> and is otherwise ignored unless it appears at the end of a
* sequence or the end of a +other_str+.
*
* a = "hello world"
* a.count "lo" #=> 5
* a.count "lo", "o" #=> 2
* a.count "hello", "^l" #=> 4
* a.count "ej-m" #=> 4
*
* "hello^world".count "\\^aeiou" #=> 4
* "hello-world".count "a\\-eo" #=> 4
*
* c = "hello world\\r\\n"
* c.count "\\" #=> 2
* c.count "\\A" #=> 0
* c.count "X-\\w" #=> 3
*/
static VALUE
rb_str_count(int argc, VALUE *argv, VALUE str)
{
char table[TR_TABLE_SIZE];
rb_encoding *enc = 0;
VALUE del = 0, nodel = 0, tstr;
char *s, *send;
int i;
int ascompat;
size_t n = 0;
rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);
tstr = argv[0];
StringValue(tstr);
enc = rb_enc_check(str, tstr);
if (argc == 1) {
const char *ptstr;
if (RSTRING_LEN(tstr) == 1 && rb_enc_asciicompat(enc) &&
(ptstr = RSTRING_PTR(tstr),
ONIGENC_IS_ALLOWED_REVERSE_MATCH(enc, (const unsigned char *)ptstr, (const unsigned char *)ptstr+1)) &&
!is_broken_string(str)) {
int clen;
unsigned char c = rb_enc_codepoint_len(ptstr, ptstr+1, &clen, enc);
s = RSTRING_PTR(str);
if (!s || RSTRING_LEN(str) == 0) return INT2FIX(0);
send = RSTRING_END(str);
while (s < send) {
if (*(unsigned char*)s++ == c) n++;
}
return SIZET2NUM(n);
}
}
tr_setup_table(tstr, table, TRUE, &del, &nodel, enc);
for (i=1; i<argc; i++) {
tstr = argv[i];
StringValue(tstr);
enc = rb_enc_check(str, tstr);
tr_setup_table(tstr, table, FALSE, &del, &nodel, enc);
}
s = RSTRING_PTR(str);
if (!s || RSTRING_LEN(str) == 0) return INT2FIX(0);
send = RSTRING_END(str);
ascompat = rb_enc_asciicompat(enc);
while (s < send) {
unsigned int c;
if (ascompat && (c = *(unsigned char*)s) < 0x80) {
if (table[c]) {
n++;
}
s++;
}
else {
int clen;
c = rb_enc_codepoint_len(s, send, &clen, enc);
if (tr_find(c, table, del, nodel)) {
n++;
}
s += clen;
}
}
return SIZET2NUM(n);
}
static VALUE
rb_fs_check(VALUE val)
{
if (!NIL_P(val) && !RB_TYPE_P(val, T_STRING) && !RB_TYPE_P(val, T_REGEXP)) {
val = rb_check_string_type(val);
if (NIL_P(val)) return 0;
}
return val;
}
static const char isspacetable[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
#define ascii_isspace(c) isspacetable[(unsigned char)(c)]
static long
split_string(VALUE result, VALUE str, long beg, long len, long empty_count)
{
if (empty_count >= 0 && len == 0) {
return empty_count + 1;
}
if (empty_count > 0) {
/* make different substrings */
if (result) {
do {
rb_ary_push(result, str_new_empty_String(str));
} while (--empty_count > 0);
}
else {
do {
rb_yield(str_new_empty_String(str));
} while (--empty_count > 0);
}
}
str = rb_str_subseq(str, beg, len);
if (result) {
rb_ary_push(result, str);
}
else {
rb_yield(str);
}
return empty_count;
}
typedef enum {
SPLIT_TYPE_AWK, SPLIT_TYPE_STRING, SPLIT_TYPE_REGEXP, SPLIT_TYPE_CHARS
} split_type_t;
static split_type_t
literal_split_pattern(VALUE spat, split_type_t default_type)
{
rb_encoding *enc = STR_ENC_GET(spat);
const char *ptr;
long len;
RSTRING_GETMEM(spat, ptr, len);
if (len == 0) {
/* Special case - split into chars */
return SPLIT_TYPE_CHARS;
}
else if (rb_enc_asciicompat(enc)) {
if (len == 1 && ptr[0] == ' ') {
return SPLIT_TYPE_AWK;
}
}
else {
int l;
if (rb_enc_ascget(ptr, ptr + len, &l, enc) == ' ' && len == l) {
return SPLIT_TYPE_AWK;
}
}
return default_type;
}
/*
* call-seq:
* str.split(pattern=nil, [limit]) -> an_array
* str.split(pattern=nil, [limit]) {|sub| block } -> str
*
* Divides <i>str</i> into substrings based on a delimiter, returning an array
* of these substrings.
*
* If <i>pattern</i> is a String, then its contents are used as
* the delimiter when splitting <i>str</i>. If <i>pattern</i> is a single
* space, <i>str</i> is split on whitespace, with leading and trailing
* whitespace and runs of contiguous whitespace characters ignored.
*
* If <i>pattern</i> is a Regexp, <i>str</i> is divided where the
* pattern matches. Whenever the pattern matches a zero-length string,
* <i>str</i> is split into individual characters. If <i>pattern</i> contains
* groups, the respective matches will be returned in the array as well.
*
* If <i>pattern</i> is <code>nil</code>, the value of <code>$;</code> is used.
* If <code>$;</code> is <code>nil</code> (which is the default), <i>str</i> is
* split on whitespace as if ' ' were specified.
*
* If the <i>limit</i> parameter is omitted, trailing null fields are
* suppressed. If <i>limit</i> is a positive number, at most that number
* of split substrings will be returned (captured groups will be returned
* as well, but are not counted towards the limit).
* If <i>limit</i> is <code>1</code>, the entire
* string is returned as the only entry in an array. If negative, there is no
* limit to the number of fields returned, and trailing null fields are not
* suppressed.
*
* When the input +str+ is empty an empty Array is returned as the string is
* considered to have no fields to split.
*
* " now's the time ".split #=> ["now's", "the", "time"]
* " now's the time ".split(' ') #=> ["now's", "the", "time"]
* " now's the time".split(/ /) #=> ["", "now's", "", "the", "time"]
* "1, 2.34,56, 7".split(%r{,\s*}) #=> ["1", "2.34", "56", "7"]
* "hello".split(//) #=> ["h", "e", "l", "l", "o"]
* "hello".split(//, 3) #=> ["h", "e", "llo"]
* "hi mom".split(%r{\s*}) #=> ["h", "i", "m", "o", "m"]
*
* "mellow yellow".split("ello") #=> ["m", "w y", "w"]
* "1,2,,3,4,,".split(',') #=> ["1", "2", "", "3", "4"]
* "1,2,,3,4,,".split(',', 4) #=> ["1", "2", "", "3,4,,"]
* "1,2,,3,4,,".split(',', -4) #=> ["1", "2", "", "3", "4", "", ""]
*
* "1:2:3".split(/(:)()()/, 2) #=> ["1", ":", "", "", "2:3"]
*
* "".split(',', -1) #=> []
*
* If a block is given, invoke the block with each split substring.
*
*/
static VALUE
rb_str_split_m(int argc, VALUE *argv, VALUE str)
{
rb_encoding *enc;
VALUE spat;
VALUE limit;
split_type_t split_type;
long beg, end, i = 0, empty_count = -1;
int lim = 0;
VALUE result, tmp;
result = rb_block_given_p() ? Qfalse : Qnil;
if (rb_scan_args(argc, argv, "02", &spat, &limit) == 2) {
lim = NUM2INT(limit);
if (lim <= 0) limit = Qnil;
else if (lim == 1) {
if (RSTRING_LEN(str) == 0)
return result ? rb_ary_new2(0) : str;
tmp = str_duplicate(rb_cString, str);
if (!result) {
rb_yield(tmp);
return str;
}
return rb_ary_new3(1, tmp);
}
i = 1;
}
if (NIL_P(limit) && !lim) empty_count = 0;
enc = STR_ENC_GET(str);
split_type = SPLIT_TYPE_REGEXP;
if (!NIL_P(spat)) {
spat = get_pat_quoted(spat, 0);
}
else if (NIL_P(spat = rb_fs)) {
split_type = SPLIT_TYPE_AWK;
}
else if (!(spat = rb_fs_check(spat))) {
rb_raise(rb_eTypeError, "value of $; must be String or Regexp");
}
else {
rb_category_warn(RB_WARN_CATEGORY_DEPRECATED, "$; is set to non-nil value");
}
if (split_type != SPLIT_TYPE_AWK) {
switch (BUILTIN_TYPE(spat)) {
case T_REGEXP:
rb_reg_options(spat); /* check if uninitialized */
tmp = RREGEXP_SRC(spat);
split_type = literal_split_pattern(tmp, SPLIT_TYPE_REGEXP);
if (split_type == SPLIT_TYPE_AWK) {
spat = tmp;
split_type = SPLIT_TYPE_STRING;
}
break;
case T_STRING:
mustnot_broken(spat);
split_type = literal_split_pattern(spat, SPLIT_TYPE_STRING);
break;
default:
UNREACHABLE_RETURN(Qnil);
}
}
#define SPLIT_STR(beg, len) (empty_count = split_string(result, str, beg, len, empty_count))
if (result) result = rb_ary_new();
beg = 0;
char *ptr = RSTRING_PTR(str);
char *eptr = RSTRING_END(str);
if (split_type == SPLIT_TYPE_AWK) {
char *bptr = ptr;
int skip = 1;
unsigned int c;
end = beg;
if (is_ascii_string(str)) {
while (ptr < eptr) {
c = (unsigned char)*ptr++;
if (skip) {
if (ascii_isspace(c)) {
beg = ptr - bptr;
}
else {
end = ptr - bptr;
skip = 0;
if (!NIL_P(limit) && lim <= i) break;
}
}
else if (ascii_isspace(c)) {
SPLIT_STR(beg, end-beg);
skip = 1;
beg = ptr - bptr;
if (!NIL_P(limit)) ++i;
}
else {
end = ptr - bptr;
}
}
}
else {
while (ptr < eptr) {
int n;
c = rb_enc_codepoint_len(ptr, eptr, &n, enc);
ptr += n;
if (skip) {
if (rb_isspace(c)) {
beg = ptr - bptr;
}
else {
end = ptr - bptr;
skip = 0;
if (!NIL_P(limit) && lim <= i) break;
}
}
else if (rb_isspace(c)) {
SPLIT_STR(beg, end-beg);
skip = 1;
beg = ptr - bptr;
if (!NIL_P(limit)) ++i;
}
else {
end = ptr - bptr;
}
}
}
}
else if (split_type == SPLIT_TYPE_STRING) {
char *str_start = ptr;
char *substr_start = ptr;
char *sptr = RSTRING_PTR(spat);
long slen = RSTRING_LEN(spat);
mustnot_broken(str);
enc = rb_enc_check(str, spat);
while (ptr < eptr &&
(end = rb_memsearch(sptr, slen, ptr, eptr - ptr, enc)) >= 0) {
/* Check we are at the start of a char */
char *t = rb_enc_right_char_head(ptr, ptr + end, eptr, enc);
if (t != ptr + end) {
ptr = t;
continue;
}
SPLIT_STR(substr_start - str_start, (ptr+end) - substr_start);
ptr += end + slen;
substr_start = ptr;
if (!NIL_P(limit) && lim <= ++i) break;
}
beg = ptr - str_start;
}
else if (split_type == SPLIT_TYPE_CHARS) {
char *str_start = ptr;
int n;
mustnot_broken(str);
enc = rb_enc_get(str);
while (ptr < eptr &&
(n = rb_enc_precise_mbclen(ptr, eptr, enc)) > 0) {
SPLIT_STR(ptr - str_start, n);
ptr += n;
if (!NIL_P(limit) && lim <= ++i) break;
}
beg = ptr - str_start;
}
else {
long len = RSTRING_LEN(str);
long start = beg;
long idx;
int last_null = 0;
struct re_registers *regs;
VALUE match = 0;
for (; rb_reg_search(spat, str, start, 0) >= 0;
(match ? (rb_match_unbusy(match), rb_backref_set(match)) : (void)0)) {
match = rb_backref_get();
if (!result) rb_match_busy(match);
regs = RMATCH_REGS(match);
end = BEG(0);
if (start == end && BEG(0) == END(0)) {
if (!ptr) {
SPLIT_STR(0, 0);
break;
}
else if (last_null == 1) {
SPLIT_STR(beg, rb_enc_fast_mbclen(ptr+beg, eptr, enc));
beg = start;
}
else {
if (start == len)
start++;
else
start += rb_enc_fast_mbclen(ptr+start,eptr,enc);
last_null = 1;
continue;
}
}
else {
SPLIT_STR(beg, end-beg);
beg = start = END(0);
}
last_null = 0;
for (idx=1; idx < regs->num_regs; idx++) {
if (BEG(idx) == -1) continue;
SPLIT_STR(BEG(idx), END(idx)-BEG(idx));
}
if (!NIL_P(limit) && lim <= ++i) break;
}
if (match) rb_match_unbusy(match);
}
if (RSTRING_LEN(str) > 0 && (!NIL_P(limit) || RSTRING_LEN(str) > beg || lim < 0)) {
SPLIT_STR(beg, RSTRING_LEN(str)-beg);
}
return result ? result : str;
}
VALUE
rb_str_split(VALUE str, const char *sep0)
{
VALUE sep;
StringValue(str);
sep = rb_str_new_cstr(sep0);
return rb_str_split_m(1, &sep, str);
}
#define WANTARRAY(m, size) (!rb_block_given_p() ? rb_ary_new_capa(size) : 0)
static inline int
enumerator_element(VALUE ary, VALUE e)
{
if (ary) {
rb_ary_push(ary, e);
return 0;
}
else {
rb_yield(e);
return 1;
}
}
#define ENUM_ELEM(ary, e) enumerator_element(ary, e)
static const char *
chomp_newline(const char *p, const char *e, rb_encoding *enc)
{
const char *prev = rb_enc_prev_char(p, e, e, enc);
if (rb_enc_is_newline(prev, e, enc)) {
e = prev;
prev = rb_enc_prev_char(p, e, e, enc);
if (prev && rb_enc_ascget(prev, e, NULL, enc) == '\r')
e = prev;
}
return e;
}
static VALUE
get_rs(void)
{
VALUE rs = rb_rs;
if (!NIL_P(rs) &&
(!RB_TYPE_P(rs, T_STRING) ||
RSTRING_LEN(rs) != 1 ||
RSTRING_PTR(rs)[0] != '\n')) {
rb_category_warn(RB_WARN_CATEGORY_DEPRECATED, "$/ is set to non-default value");
}
return rs;
}
#define rb_rs get_rs()
static VALUE
rb_str_enumerate_lines(int argc, VALUE *argv, VALUE str, VALUE ary)
{
rb_encoding *enc;
VALUE line, rs, orig = str, opts = Qnil, chomp = Qfalse;
const char *ptr, *pend, *subptr, *subend, *rsptr, *hit, *adjusted;
long pos, len, rslen;
int rsnewline = 0;
if (rb_scan_args(argc, argv, "01:", &rs, &opts) == 0)
rs = rb_rs;
if (!NIL_P(opts)) {
static ID keywords[1];
if (!keywords[0]) {
keywords[0] = rb_intern_const("chomp");
}
rb_get_kwargs(opts, keywords, 0, 1, &chomp);
chomp = (chomp != Qundef && RTEST(chomp));
}
if (NIL_P(rs)) {
if (!ENUM_ELEM(ary, str)) {
return ary;
}
else {
return orig;
}
}
if (!RSTRING_LEN(str)) goto end;
str = rb_str_new_frozen(str);
ptr = subptr = RSTRING_PTR(str);
pend = RSTRING_END(str);
len = RSTRING_LEN(str);
StringValue(rs);
rslen = RSTRING_LEN(rs);
if (rs == rb_default_rs)
enc = rb_enc_get(str);
else
enc = rb_enc_check(str, rs);
if (rslen == 0) {
/* paragraph mode */
int n;
const char *eol = NULL;
subend = subptr;
while (subend < pend) {
do {
if (rb_enc_ascget(subend, pend, &n, enc) != '\r')
n = 0;
rslen = n + rb_enc_mbclen(subend + n, pend, enc);
if (rb_enc_is_newline(subend + n, pend, enc)) {
if (eol == subend) break;
subend += rslen;
if (subptr) eol = subend;
}
else {
if (!subptr) subptr = subend;
subend += rslen;
}
rslen = 0;
} while (subend < pend);
if (!subptr) break;
line = rb_str_subseq(str, subptr - ptr,
subend - subptr + (chomp ? 0 : rslen));
if (ENUM_ELEM(ary, line)) {
str_mod_check(str, ptr, len);
}
subptr = eol = NULL;
}
goto end;
}
else {
rsptr = RSTRING_PTR(rs);
if (RSTRING_LEN(rs) == rb_enc_mbminlen(enc) &&
rb_enc_is_newline(rsptr, rsptr + RSTRING_LEN(rs), enc)) {
rsnewline = 1;
}
}
if ((rs == rb_default_rs) && !rb_enc_asciicompat(enc)) {
rs = rb_str_new(rsptr, rslen);
rs = rb_str_encode(rs, rb_enc_from_encoding(enc), 0, Qnil);
rsptr = RSTRING_PTR(rs);
rslen = RSTRING_LEN(rs);
}
while (subptr < pend) {
pos = rb_memsearch(rsptr, rslen, subptr, pend - subptr, enc);
if (pos < 0) break;
hit = subptr + pos;
adjusted = rb_enc_right_char_head(subptr, hit, pend, enc);
if (hit != adjusted) {
subptr = adjusted;
continue;
}
subend = hit += rslen;
if (chomp) {
if (rsnewline) {
subend = chomp_newline(subptr, subend, enc);
}
else {
subend -= rslen;
}
}
line = rb_str_subseq(str, subptr - ptr, subend - subptr);
if (ENUM_ELEM(ary, line)) {
str_mod_check(str, ptr, len);
}
subptr = hit;
}
if (subptr != pend) {
if (chomp) {
if (rsnewline) {
pend = chomp_newline(subptr, pend, enc);
}
else if (pend - subptr >= rslen &&
memcmp(pend - rslen, rsptr, rslen) == 0) {
pend -= rslen;
}
}
line = rb_str_subseq(str, subptr - ptr, pend - subptr);
ENUM_ELEM(ary, line);
RB_GC_GUARD(str);
}
end:
if (ary)
return ary;
else
return orig;
}
/*
* call-seq:
* str.each_line(separator=$/, chomp: false) {|substr| block } -> str
* str.each_line(separator=$/, chomp: false) -> an_enumerator
*
* Splits <i>str</i> using the supplied parameter as the record
* separator (<code>$/</code> by default), passing each substring in
* turn to the supplied block. If a zero-length record separator is
* supplied, the string is split into paragraphs delimited by
* multiple successive newlines.
*
* If +chomp+ is +true+, +separator+ will be removed from the end of each
* line.
*
* If no block is given, an enumerator is returned instead.
*
* "hello\nworld".each_line {|s| p s}
* # prints:
* # "hello\n"
* # "world"
*
* "hello\nworld".each_line('l') {|s| p s}
* # prints:
* # "hel"
* # "l"
* # "o\nworl"
* # "d"
*
* "hello\n\n\nworld".each_line('') {|s| p s}
* # prints
* # "hello\n\n"
* # "world"
*
* "hello\nworld".each_line(chomp: true) {|s| p s}
* # prints:
* # "hello"
* # "world"
*
* "hello\nworld".each_line('l', chomp: true) {|s| p s}
* # prints:
* # "he"
* # ""
* # "o\nwor"
* # "d"
*
*/
static VALUE
rb_str_each_line(int argc, VALUE *argv, VALUE str)
{
RETURN_SIZED_ENUMERATOR(str, argc, argv, 0);
return rb_str_enumerate_lines(argc, argv, str, 0);
}
/*
* call-seq:
* str.lines(separator=$/, chomp: false) -> an_array
*
* Returns an array of lines in <i>str</i> split using the supplied
* record separator (<code>$/</code> by default). This is a
* shorthand for <code>str.each_line(separator, getline_args).to_a</code>.
*
* If +chomp+ is +true+, +separator+ will be removed from the end of each
* line.
*
* "hello\nworld\n".lines #=> ["hello\n", "world\n"]
* "hello world".lines(' ') #=> ["hello ", " ", "world"]
* "hello\nworld\n".lines(chomp: true) #=> ["hello", "world"]
*
* If a block is given, which is a deprecated form, works the same as
* <code>each_line</code>.
*/
static VALUE
rb_str_lines(int argc, VALUE *argv, VALUE str)
{
VALUE ary = WANTARRAY("lines", 0);
return rb_str_enumerate_lines(argc, argv, str, ary);
}
static VALUE
rb_str_each_byte_size(VALUE str, VALUE args, VALUE eobj)
{
return LONG2FIX(RSTRING_LEN(str));
}
static VALUE
rb_str_enumerate_bytes(VALUE str, VALUE ary)
{
long i;
for (i=0; i<RSTRING_LEN(str); i++) {
ENUM_ELEM(ary, INT2FIX((unsigned char)RSTRING_PTR(str)[i]));
}
if (ary)
return ary;
else
return str;
}
/*
* call-seq:
* str.each_byte {|integer| block } -> str
* str.each_byte -> an_enumerator
*
* Passes each byte in <i>str</i> to the given block, or returns an
* enumerator if no block is given.
*
* "hello".each_byte {|c| print c, ' ' }
*
* <em>produces:</em>
*
* 104 101 108 108 111
*/
static VALUE
rb_str_each_byte(VALUE str)
{
RETURN_SIZED_ENUMERATOR(str, 0, 0, rb_str_each_byte_size);
return rb_str_enumerate_bytes(str, 0);
}
/*
* call-seq:
* str.bytes -> an_array
*
* Returns an array of bytes in <i>str</i>. This is a shorthand for
* <code>str.each_byte.to_a</code>.
*
* If a block is given, which is a deprecated form, works the same as
* <code>each_byte</code>.
*/
static VALUE
rb_str_bytes(VALUE str)
{
VALUE ary = WANTARRAY("bytes", RSTRING_LEN(str));
return rb_str_enumerate_bytes(str, ary);
}
static VALUE
rb_str_each_char_size(VALUE str, VALUE args, VALUE eobj)
{
return rb_str_length(str);
}
static VALUE
rb_str_enumerate_chars(VALUE str, VALUE ary)
{
VALUE orig = str;
long i, len, n;
const char *ptr;
rb_encoding *enc;
str = rb_str_new_frozen(str);
ptr = RSTRING_PTR(str);
len = RSTRING_LEN(str);
enc = rb_enc_get(str);
if (ENC_CODERANGE_CLEAN_P(ENC_CODERANGE(str))) {
for (i = 0; i < len; i += n) {
n = rb_enc_fast_mbclen(ptr + i, ptr + len, enc);
ENUM_ELEM(ary, rb_str_subseq(str, i, n));
}
}
else {
for (i = 0; i < len; i += n) {
n = rb_enc_mbclen(ptr + i, ptr + len, enc);
ENUM_ELEM(ary, rb_str_subseq(str, i, n));
}
}
RB_GC_GUARD(str);
if (ary)
return ary;
else
return orig;
}
/*
* call-seq:
* str.each_char {|cstr| block } -> str
* str.each_char -> an_enumerator
*
* Passes each character in <i>str</i> to the given block, or returns
* an enumerator if no block is given.
*
* "hello".each_char {|c| print c, ' ' }
*
* <em>produces:</em>
*
* h e l l o
*/
static VALUE
rb_str_each_char(VALUE str)
{
RETURN_SIZED_ENUMERATOR(str, 0, 0, rb_str_each_char_size);
return rb_str_enumerate_chars(str, 0);
}
/*
* call-seq:
* str.chars -> an_array
*
* Returns an array of characters in <i>str</i>. This is a shorthand
* for <code>str.each_char.to_a</code>.
*
* If a block is given, which is a deprecated form, works the same as
* <code>each_char</code>.
*/
static VALUE
rb_str_chars(VALUE str)
{
VALUE ary = WANTARRAY("chars", rb_str_strlen(str));
return rb_str_enumerate_chars(str, ary);
}
static VALUE
rb_str_enumerate_codepoints(VALUE str, VALUE ary)
{
VALUE orig = str;
int n;
unsigned int c;
const char *ptr, *end;
rb_encoding *enc;
if (single_byte_optimizable(str))
return rb_str_enumerate_bytes(str, ary);
str = rb_str_new_frozen(str);
ptr = RSTRING_PTR(str);
end = RSTRING_END(str);
enc = STR_ENC_GET(str);
while (ptr < end) {
c = rb_enc_codepoint_len(ptr, end, &n, enc);
ENUM_ELEM(ary, UINT2NUM(c));
ptr += n;
}
RB_GC_GUARD(str);
if (ary)
return ary;
else
return orig;
}
/*
* call-seq:
* str.each_codepoint {|integer| block } -> str
* str.each_codepoint -> an_enumerator
*
* Passes the Integer ordinal of each character in <i>str</i>,
* also known as a <i>codepoint</i> when applied to Unicode strings to the
* given block. For encodings other than UTF-8/UTF-16(BE|LE)/UTF-32(BE|LE),
* values are directly derived from the binary representation
* of each character.
*
* If no block is given, an enumerator is returned instead.
*
* "hello\u0639".each_codepoint {|c| print c, ' ' }
*
* <em>produces:</em>
*
* 104 101 108 108 111 1593
*/
static VALUE
rb_str_each_codepoint(VALUE str)
{
RETURN_SIZED_ENUMERATOR(str, 0, 0, rb_str_each_char_size);
return rb_str_enumerate_codepoints(str, 0);
}
/*
* call-seq:
* str.codepoints -> an_array
*
* Returns an array of the Integer ordinals of the
* characters in <i>str</i>. This is a shorthand for
* <code>str.each_codepoint.to_a</code>.
*
* If a block is given, which is a deprecated form, works the same as
* <code>each_codepoint</code>.
*/
static VALUE
rb_str_codepoints(VALUE str)
{
VALUE ary = WANTARRAY("codepoints", rb_str_strlen(str));
return rb_str_enumerate_codepoints(str, ary);
}
static regex_t *
get_reg_grapheme_cluster(rb_encoding *enc)
{
int encidx = rb_enc_to_index(enc);
regex_t *reg_grapheme_cluster = NULL;
static regex_t *reg_grapheme_cluster_utf8 = NULL;
/* synchronize */
if (encidx == rb_utf8_encindex() && reg_grapheme_cluster_utf8) {
reg_grapheme_cluster = reg_grapheme_cluster_utf8;
}
if (!reg_grapheme_cluster) {
const OnigUChar source_ascii[] = "\\X";
OnigErrorInfo einfo;
const OnigUChar *source = source_ascii;
size_t source_len = sizeof(source_ascii) - 1;
switch (encidx) {
#define CHARS_16BE(x) (OnigUChar)((x)>>8), (OnigUChar)(x)
#define CHARS_16LE(x) (OnigUChar)(x), (OnigUChar)((x)>>8)
#define CHARS_32BE(x) CHARS_16BE((x)>>16), CHARS_16BE(x)
#define CHARS_32LE(x) CHARS_16LE(x), CHARS_16LE((x)>>16)
#define CASE_UTF(e) \
case ENCINDEX_UTF_##e: { \
static const OnigUChar source_UTF_##e[] = {CHARS_##e('\\'), CHARS_##e('X')}; \
source = source_UTF_##e; \
source_len = sizeof(source_UTF_##e); \
break; \
}
CASE_UTF(16BE); CASE_UTF(16LE); CASE_UTF(32BE); CASE_UTF(32LE);
#undef CASE_UTF
#undef CHARS_16BE
#undef CHARS_16LE
#undef CHARS_32BE
#undef CHARS_32LE
}
int r = onig_new(&reg_grapheme_cluster, source, source + source_len,
ONIG_OPTION_DEFAULT, enc, OnigDefaultSyntax, &einfo);
if (r) {
UChar message[ONIG_MAX_ERROR_MESSAGE_LEN];
onig_error_code_to_str(message, r, &einfo);
rb_fatal("cannot compile grapheme cluster regexp: %s", (char *)message);
}
if (encidx == rb_utf8_encindex()) {
reg_grapheme_cluster_utf8 = reg_grapheme_cluster;
}
}
return reg_grapheme_cluster;
}
static VALUE
rb_str_each_grapheme_cluster_size(VALUE str, VALUE args, VALUE eobj)
{
size_t grapheme_cluster_count = 0;
regex_t *reg_grapheme_cluster = NULL;
rb_encoding *enc = rb_enc_from_index(ENCODING_GET(str));
const char *ptr, *end;
if (!rb_enc_unicode_p(enc)) {
return rb_str_length(str);
}
reg_grapheme_cluster = get_reg_grapheme_cluster(enc);
ptr = RSTRING_PTR(str);
end = RSTRING_END(str);
while (ptr < end) {
OnigPosition len = onig_match(reg_grapheme_cluster,
(const OnigUChar *)ptr, (const OnigUChar *)end,
(const OnigUChar *)ptr, NULL, 0);
if (len <= 0) break;
grapheme_cluster_count++;
ptr += len;
}
return SIZET2NUM(grapheme_cluster_count);
}
static VALUE
rb_str_enumerate_grapheme_clusters(VALUE str, VALUE ary)
{
VALUE orig = str;
regex_t *reg_grapheme_cluster = NULL;
rb_encoding *enc = rb_enc_from_index(ENCODING_GET(str));
const char *ptr0, *ptr, *end;
if (!rb_enc_unicode_p(enc)) {
return rb_str_enumerate_chars(str, ary);
}
if (!ary) str = rb_str_new_frozen(str);
reg_grapheme_cluster = get_reg_grapheme_cluster(enc);
ptr0 = ptr = RSTRING_PTR(str);
end = RSTRING_END(str);
while (ptr < end) {
OnigPosition len = onig_match(reg_grapheme_cluster,
(const OnigUChar *)ptr, (const OnigUChar *)end,
(const OnigUChar *)ptr, NULL, 0);
if (len <= 0) break;
ENUM_ELEM(ary, rb_str_subseq(str, ptr-ptr0, len));
ptr += len;
}
RB_GC_GUARD(str);
if (ary)
return ary;
else
return orig;
}
/*
* call-seq:
* str.each_grapheme_cluster {|cstr| block } -> str
* str.each_grapheme_cluster -> an_enumerator
*
* Passes each grapheme cluster in <i>str</i> to the given block, or returns
* an enumerator if no block is given.
* Unlike String#each_char, this enumerates by grapheme clusters defined by
* Unicode Standard Annex #29 http://unicode.org/reports/tr29/
*
* "a\u0300".each_char.to_a.size #=> 2
* "a\u0300".each_grapheme_cluster.to_a.size #=> 1
*
*/
static VALUE
rb_str_each_grapheme_cluster(VALUE str)
{
RETURN_SIZED_ENUMERATOR(str, 0, 0, rb_str_each_grapheme_cluster_size);
return rb_str_enumerate_grapheme_clusters(str, 0);
}
/*
* call-seq:
* str.grapheme_clusters -> an_array
*
* Returns an array of grapheme clusters in <i>str</i>. This is a shorthand
* for <code>str.each_grapheme_cluster.to_a</code>.
*
* If a block is given, which is a deprecated form, works the same as
* <code>each_grapheme_cluster</code>.
*/
static VALUE
rb_str_grapheme_clusters(VALUE str)
{
VALUE ary = WANTARRAY("grapheme_clusters", rb_str_strlen(str));
return rb_str_enumerate_grapheme_clusters(str, ary);
}
static long
chopped_length(VALUE str)
{
rb_encoding *enc = STR_ENC_GET(str);
const char *p, *p2, *beg, *end;
beg = RSTRING_PTR(str);
end = beg + RSTRING_LEN(str);
if (beg >= end) return 0;
p = rb_enc_prev_char(beg, end, end, enc);
if (!p) return 0;
if (p > beg && rb_enc_ascget(p, end, 0, enc) == '\n') {
p2 = rb_enc_prev_char(beg, p, end, enc);
if (p2 && rb_enc_ascget(p2, end, 0, enc) == '\r') p = p2;
}
return p - beg;
}
/*
* call-seq:
* str.chop! -> str or nil
*
* Processes <i>str</i> as for String#chop, returning <i>str</i>, or
* <code>nil</code> if <i>str</i> is the empty string. See also
* String#chomp!.
*/
static VALUE
rb_str_chop_bang(VALUE str)
{
str_modify_keep_cr(str);
if (RSTRING_LEN(str) > 0) {
long len;
len = chopped_length(str);
STR_SET_LEN(str, len);
TERM_FILL(&RSTRING_PTR(str)[len], TERM_LEN(str));
if (ENC_CODERANGE(str) != ENC_CODERANGE_7BIT) {
ENC_CODERANGE_CLEAR(str);
}
return str;
}
return Qnil;
}
/*
* call-seq:
* str.chop -> new_str
*
* Returns a new String with the last character removed. If the
* string ends with <code>\r\n</code>, both characters are
* removed. Applying <code>chop</code> to an empty string returns an
* empty string. String#chomp is often a safer alternative, as it
* leaves the string unchanged if it doesn't end in a record
* separator.
*
* "string\r\n".chop #=> "string"
* "string\n\r".chop #=> "string\n"
* "string\n".chop #=> "string"
* "string".chop #=> "strin"
* "x".chop.chop #=> ""
*/
static VALUE
rb_str_chop(VALUE str)
{
return rb_str_subseq(str, 0, chopped_length(str));
}
static long
smart_chomp(VALUE str, const char *e, const char *p)
{
rb_encoding *enc = rb_enc_get(str);
if (rb_enc_mbminlen(enc) > 1) {
const char *pp = rb_enc_left_char_head(p, e-rb_enc_mbminlen(enc), e, enc);
if (rb_enc_is_newline(pp, e, enc)) {
e = pp;
}
pp = e - rb_enc_mbminlen(enc);
if (pp >= p) {
pp = rb_enc_left_char_head(p, pp, e, enc);
if (rb_enc_ascget(pp, e, 0, enc) == '\r') {
e = pp;
}
}
}
else {
switch (*(e-1)) { /* not e[-1] to get rid of VC bug */
case '\n':
if (--e > p && *(e-1) == '\r') {
--e;
}
break;
case '\r':
--e;
break;
}
}
return e - p;
}
static long
chompped_length(VALUE str, VALUE rs)
{
rb_encoding *enc;
int newline;
char *pp, *e, *rsptr;
long rslen;
char *const p = RSTRING_PTR(str);
long len = RSTRING_LEN(str);
if (len == 0) return 0;
e = p + len;
if (rs == rb_default_rs) {
return smart_chomp(str, e, p);
}
enc = rb_enc_get(str);
RSTRING_GETMEM(rs, rsptr, rslen);
if (rslen == 0) {
if (rb_enc_mbminlen(enc) > 1) {
while (e > p) {
pp = rb_enc_left_char_head(p, e-rb_enc_mbminlen(enc), e, enc);
if (!rb_enc_is_newline(pp, e, enc)) break;
e = pp;
pp -= rb_enc_mbminlen(enc);
if (pp >= p) {
pp = rb_enc_left_char_head(p, pp, e, enc);
if (rb_enc_ascget(pp, e, 0, enc) == '\r') {
e = pp;
}
}
}
}
else {
while (e > p && *(e-1) == '\n') {
--e;
if (e > p && *(e-1) == '\r')
--e;
}
}
return e - p;
}
if (rslen > len) return len;
enc = rb_enc_get(rs);
newline = rsptr[rslen-1];
if (rslen == rb_enc_mbminlen(enc)) {
if (rslen == 1) {
if (newline == '\n')
return smart_chomp(str, e, p);
}
else {
if (rb_enc_is_newline(rsptr, rsptr+rslen, enc))
return smart_chomp(str, e, p);
}
}
enc = rb_enc_check(str, rs);
if (is_broken_string(rs)) {
return len;
}
pp = e - rslen;
if (p[len-1] == newline &&
(rslen <= 1 ||
memcmp(rsptr, pp, rslen) == 0)) {
if (rb_enc_left_char_head(p, pp, e, enc) == pp)
return len - rslen;
RB_GC_GUARD(rs);
}
return len;
}
/*!
* Returns the separator for arguments of rb_str_chomp.
*
* @return returns rb_ps ($/) as default, the default value of rb_ps ($/) is "\n".
*/
static VALUE
chomp_rs(int argc, const VALUE *argv)
{
rb_check_arity(argc, 0, 1);
if (argc > 0) {
VALUE rs = argv[0];
if (!NIL_P(rs)) StringValue(rs);
return rs;
}
else {
return rb_rs;
}
}
VALUE
rb_str_chomp_string(VALUE str, VALUE rs)
{
long olen = RSTRING_LEN(str);
long len = chompped_length(str, rs);
if (len >= olen) return Qnil;
str_modify_keep_cr(str);
STR_SET_LEN(str, len);
TERM_FILL(&RSTRING_PTR(str)[len], TERM_LEN(str));
if (ENC_CODERANGE(str) != ENC_CODERANGE_7BIT) {
ENC_CODERANGE_CLEAR(str);
}
return str;
}
/*
* call-seq:
* str.chomp!(separator=$/) -> str or nil
*
* Modifies <i>str</i> in place as described for String#chomp,
* returning <i>str</i>, or <code>nil</code> if no modifications were
* made.
*/
static VALUE
rb_str_chomp_bang(int argc, VALUE *argv, VALUE str)
{
VALUE rs;
str_modifiable(str);
if (RSTRING_LEN(str) == 0) return Qnil;
rs = chomp_rs(argc, argv);
if (NIL_P(rs)) return Qnil;
return rb_str_chomp_string(str, rs);
}
/*
* call-seq:
* str.chomp(separator=$/) -> new_str
*
* Returns a new String with the given record separator removed
* from the end of <i>str</i> (if present). If <code>$/</code> has not been
* changed from the default Ruby record separator, then <code>chomp</code> also
* removes carriage return characters (that is, it will remove <code>\n</code>,
* <code>\r</code>, and <code>\r\n</code>). If <code>$/</code> is an empty string,
* it will remove all trailing newlines from the string.
*
* "hello".chomp #=> "hello"
* "hello\n".chomp #=> "hello"
* "hello\r\n".chomp #=> "hello"
* "hello\n\r".chomp #=> "hello\n"
* "hello\r".chomp #=> "hello"
* "hello \n there".chomp #=> "hello \n there"
* "hello".chomp("llo") #=> "he"
* "hello\r\n\r\n".chomp('') #=> "hello"
* "hello\r\n\r\r\n".chomp('') #=> "hello\r\n\r"
*/
static VALUE
rb_str_chomp(int argc, VALUE *argv, VALUE str)
{
VALUE rs = chomp_rs(argc, argv);
if (NIL_P(rs)) return str_duplicate(rb_cString, str);
return rb_str_subseq(str, 0, chompped_length(str, rs));
}
static long
lstrip_offset(VALUE str, const char *s, const char *e, rb_encoding *enc)
{
const char *const start = s;
if (!s || s >= e) return 0;
/* remove spaces at head */
if (single_byte_optimizable(str)) {
while (s < e && (*s == '\0' || ascii_isspace(*s))) s++;
}
else {
while (s < e) {
int n;
unsigned int cc = rb_enc_codepoint_len(s, e, &n, enc);
if (cc && !rb_isspace(cc)) break;
s += n;
}
}
return s - start;
}
/*
* call-seq:
* str.lstrip! -> self or nil
*
* Removes leading whitespace from the receiver.
* Returns the altered receiver, or +nil+ if no change was made.
* See also String#rstrip! and String#strip!.
*
* Refer to String#strip for the definition of whitespace.
*
* " hello ".lstrip! #=> "hello "
* "hello ".lstrip! #=> nil
* "hello".lstrip! #=> nil
*/
static VALUE
rb_str_lstrip_bang(VALUE str)
{
rb_encoding *enc;
char *start, *s;
long olen, loffset;
str_modify_keep_cr(str);
enc = STR_ENC_GET(str);
RSTRING_GETMEM(str, start, olen);
loffset = lstrip_offset(str, start, start+olen, enc);
if (loffset > 0) {
long len = olen-loffset;
s = start + loffset;
memmove(start, s, len);
STR_SET_LEN(str, len);
TERM_FILL(start+len, rb_enc_mbminlen(enc));
return str;
}
return Qnil;
}
/*
* call-seq:
* str.lstrip -> new_str
*
* Returns a copy of the receiver with leading whitespace removed.
* See also String#rstrip and String#strip.
*
* Refer to String#strip for the definition of whitespace.
*
* " hello ".lstrip #=> "hello "
* "hello".lstrip #=> "hello"
*/
static VALUE
rb_str_lstrip(VALUE str)
{
char *start;
long len, loffset;
RSTRING_GETMEM(str, start, len);
loffset = lstrip_offset(str, start, start+len, STR_ENC_GET(str));
if (loffset <= 0) return str_duplicate(rb_cString, str);
return rb_str_subseq(str, loffset, len - loffset);
}
static long
rstrip_offset(VALUE str, const char *s, const char *e, rb_encoding *enc)
{
const char *t;
rb_str_check_dummy_enc(enc);
if (!s || s >= e) return 0;
t = e;
/* remove trailing spaces or '\0's */
if (single_byte_optimizable(str)) {
unsigned char c;
while (s < t && ((c = *(t-1)) == '\0' || ascii_isspace(c))) t--;
}
else {
char *tp;
while ((tp = rb_enc_prev_char(s, t, e, enc)) != NULL) {
unsigned int c = rb_enc_codepoint(tp, e, enc);
if (c && !rb_isspace(c)) break;
t = tp;
}
}
return e - t;
}
/*
* call-seq:
* str.rstrip! -> self or nil
*
* Removes trailing whitespace from the receiver.
* Returns the altered receiver, or +nil+ if no change was made.
* See also String#lstrip! and String#strip!.
*
* Refer to String#strip for the definition of whitespace.
*
* " hello ".rstrip! #=> " hello"
* " hello".rstrip! #=> nil
* "hello".rstrip! #=> nil
*/
static VALUE
rb_str_rstrip_bang(VALUE str)
{
rb_encoding *enc;
char *start;
long olen, roffset;
str_modify_keep_cr(str);
enc = STR_ENC_GET(str);
RSTRING_GETMEM(str, start, olen);
roffset = rstrip_offset(str, start, start+olen, enc);
if (roffset > 0) {
long len = olen - roffset;
STR_SET_LEN(str, len);
TERM_FILL(start+len, rb_enc_mbminlen(enc));
return str;
}
return Qnil;
}
/*
* call-seq:
* str.rstrip -> new_str
*
* Returns a copy of the receiver with trailing whitespace removed.
* See also String#lstrip and String#strip.
*
* Refer to String#strip for the definition of whitespace.
*
* " hello ".rstrip #=> " hello"
* "hello".rstrip #=> "hello"
*/
static VALUE
rb_str_rstrip(VALUE str)
{
rb_encoding *enc;
char *start;
long olen, roffset;
enc = STR_ENC_GET(str);
RSTRING_GETMEM(str, start, olen);
roffset = rstrip_offset(str, start, start+olen, enc);
if (roffset <= 0) return str_duplicate(rb_cString, str);
return rb_str_subseq(str, 0, olen-roffset);
}
/*
* call-seq:
* str.strip! -> self or nil
*
* Removes leading and trailing whitespace from the receiver.
* Returns the altered receiver, or +nil+ if there was no change.
*
* Refer to String#strip for the definition of whitespace.
*
* " hello ".strip! #=> "hello"
* "hello".strip! #=> nil
*/
static VALUE
rb_str_strip_bang(VALUE str)
{
char *start;
long olen, loffset, roffset;
rb_encoding *enc;
str_modify_keep_cr(str);
enc = STR_ENC_GET(str);
RSTRING_GETMEM(str, start, olen);
loffset = lstrip_offset(str, start, start+olen, enc);
roffset = rstrip_offset(str, start+loffset, start+olen, enc);
if (loffset > 0 || roffset > 0) {
long len = olen-roffset;
if (loffset > 0) {
len -= loffset;
memmove(start, start + loffset, len);
}
STR_SET_LEN(str, len);
TERM_FILL(start+len, rb_enc_mbminlen(enc));
return str;
}
return Qnil;
}
/*
* call-seq:
* str.strip -> new_str
*
* Returns a copy of the receiver with leading and trailing whitespace removed.
*
* Whitespace is defined as any of the following characters:
* null, horizontal tab, line feed, vertical tab, form feed, carriage return, space.
*
* " hello ".strip #=> "hello"
* "\tgoodbye\r\n".strip #=> "goodbye"
* "\x00\t\n\v\f\r ".strip #=> ""
* "hello".strip #=> "hello"
*/
static VALUE
rb_str_strip(VALUE str)
{
char *start;
long olen, loffset, roffset;
rb_encoding *enc = STR_ENC_GET(str);
RSTRING_GETMEM(str, start, olen);
loffset = lstrip_offset(str, start, start+olen, enc);
roffset = rstrip_offset(str, start+loffset, start+olen, enc);
if (loffset <= 0 && roffset <= 0) return str_duplicate(rb_cString, str);
return rb_str_subseq(str, loffset, olen-loffset-roffset);
}
static VALUE
scan_once(VALUE str, VALUE pat, long *start, int set_backref_str)
{
VALUE result, match;
struct re_registers *regs;
int i;
long end, pos = rb_pat_search(pat, str, *start, set_backref_str);
if (pos >= 0) {
if (BUILTIN_TYPE(pat) == T_STRING) {
regs = NULL;
end = pos + RSTRING_LEN(pat);
}
else {
match = rb_backref_get();
regs = RMATCH_REGS(match);
pos = BEG(0);
end = END(0);
}
if (pos == end) {
rb_encoding *enc = STR_ENC_GET(str);
/*
* Always consume at least one character of the input string
*/
if (RSTRING_LEN(str) > end)
*start = end + rb_enc_fast_mbclen(RSTRING_PTR(str) + end,
RSTRING_END(str), enc);
else
*start = end + 1;
}
else {
*start = end;
}
if (!regs || regs->num_regs == 1) {
result = rb_str_subseq(str, pos, end - pos);
return result;
}
result = rb_ary_new2(regs->num_regs);
for (i=1; i < regs->num_regs; i++) {
VALUE s = Qnil;
if (BEG(i) >= 0) {
s = rb_str_subseq(str, BEG(i), END(i)-BEG(i));
}
rb_ary_push(result, s);
}
return result;
}
return Qnil;
}
/*
* call-seq:
* str.scan(pattern) -> array
* str.scan(pattern) {|match, ...| block } -> str
*
* Both forms iterate through <i>str</i>, matching the pattern (which may be a
* Regexp or a String). For each match, a result is
* generated and either added to the result array or passed to the block. If
* the pattern contains no groups, each individual result consists of the
* matched string, <code>$&</code>. If the pattern contains groups, each
* individual result is itself an array containing one entry per group.
*
* a = "cruel world"
* a.scan(/\w+/) #=> ["cruel", "world"]
* a.scan(/.../) #=> ["cru", "el ", "wor"]
* a.scan(/(...)/) #=> [["cru"], ["el "], ["wor"]]
* a.scan(/(..)(..)/) #=> [["cr", "ue"], ["l ", "wo"]]
*
* And the block form:
*
* a.scan(/\w+/) {|w| print "<<#{w}>> " }
* print "\n"
* a.scan(/(.)(.)/) {|x,y| print y, x }
* print "\n"
*
* <em>produces:</em>
*
* <<cruel>> <<world>>
* rceu lowlr
*/
static VALUE
rb_str_scan(VALUE str, VALUE pat)
{
VALUE result;
long start = 0;
long last = -1, prev = 0;
char *p = RSTRING_PTR(str); long len = RSTRING_LEN(str);
pat = get_pat_quoted(pat, 1);
mustnot_broken(str);
if (!rb_block_given_p()) {
VALUE ary = rb_ary_new();
while (!NIL_P(result = scan_once(str, pat, &start, 0))) {
last = prev;
prev = start;
rb_ary_push(ary, result);
}
if (last >= 0) rb_pat_search(pat, str, last, 1);
else rb_backref_set(Qnil);
return ary;
}
while (!NIL_P(result = scan_once(str, pat, &start, 1))) {
last = prev;
prev = start;
rb_yield(result);
str_mod_check(str, p, len);
}
if (last >= 0) rb_pat_search(pat, str, last, 1);
return str;
}
/*
* call-seq:
* str.hex -> integer
*
* Treats leading characters from <i>str</i> as a string of hexadecimal digits
* (with an optional sign and an optional <code>0x</code>) and returns the
* corresponding number. Zero is returned on error.
*
* "0x0a".hex #=> 10
* "-1234".hex #=> -4660
* "0".hex #=> 0
* "wombat".hex #=> 0
*/
static VALUE
rb_str_hex(VALUE str)
{
return rb_str_to_inum(str, 16, FALSE);
}
/*
* call-seq:
* str.oct -> integer
*
* Treats leading characters of <i>str</i> as a string of octal digits (with an
* optional sign) and returns the corresponding number. Returns 0 if the
* conversion fails.
*
* "123".oct #=> 83
* "-377".oct #=> -255
* "bad".oct #=> 0
* "0377bad".oct #=> 255
*
* If +str+ starts with <code>0</code>, radix indicators are honored.
* See Kernel#Integer.
*/
static VALUE
rb_str_oct(VALUE str)
{
return rb_str_to_inum(str, -8, FALSE);
}
#ifndef HAVE_CRYPT_R
# include "ruby/thread_native.h"
# include "ruby/atomic.h"
static struct {
rb_atomic_t initialized;
rb_nativethread_lock_t lock;
} crypt_mutex;
static void
crypt_mutex_destroy(void)
{
RUBY_ASSERT_ALWAYS(crypt_mutex.initialized == 1);
rb_nativethread_lock_destroy(&crypt_mutex.lock);
crypt_mutex.initialized = 0;
}
static void
crypt_mutex_initialize(void)
{
rb_atomic_t i;
while ((i = RUBY_ATOMIC_CAS(crypt_mutex.initialized, 0, 2)) == 2);
switch (i) {
case 0:
rb_nativethread_lock_initialize(&crypt_mutex.lock);
atexit(crypt_mutex_destroy);
RUBY_ASSERT(crypt_mutex.initialized == 2);
RUBY_ATOMIC_CAS(crypt_mutex.initialized, 2, 1);
break;
case 1:
break;
default:
rb_bug("crypt_mutex.initialized: %d->%d", i, crypt_mutex.initialized);
}
}
#endif
/*
* call-seq:
* str.crypt(salt_str) -> new_str
*
* Returns the string generated by calling <code>crypt(3)</code>
* standard library function with <code>str</code> and
* <code>salt_str</code>, in this order, as its arguments. Please do
* not use this method any longer. It is legacy; provided only for
* backward compatibility with ruby scripts in earlier days. It is
* bad to use in contemporary programs for several reasons:
*
* * Behaviour of C's <code>crypt(3)</code> depends on the OS it is
* run. The generated string lacks data portability.
*
* * On some OSes such as Mac OS, <code>crypt(3)</code> never fails
* (i.e. silently ends up in unexpected results).
*
* * On some OSes such as Mac OS, <code>crypt(3)</code> is not
* thread safe.
*
* * So-called "traditional" usage of <code>crypt(3)</code> is very
* very very weak. According to its manpage, Linux's traditional
* <code>crypt(3)</code> output has only 2**56 variations; too
* easy to brute force today. And this is the default behaviour.
*
* * In order to make things robust some OSes implement so-called
* "modular" usage. To go through, you have to do a complex
* build-up of the <code>salt_str</code> parameter, by hand.
* Failure in generation of a proper salt string tends not to
* yield any errors; typos in parameters are normally not
* detectable.
*
* * For instance, in the following example, the second invocation
* of String#crypt is wrong; it has a typo in "round=" (lacks
* "s"). However the call does not fail and something unexpected
* is generated.
*
* "foo".crypt("$5$rounds=1000$salt$") # OK, proper usage
* "foo".crypt("$5$round=1000$salt$") # Typo not detected
*
* * Even in the "modular" mode, some hash functions are considered
* archaic and no longer recommended at all; for instance module
* <code>$1$</code> is officially abandoned by its author: see
* http://phk.freebsd.dk/sagas/md5crypt_eol/ . For another
* instance module <code>$3$</code> is considered completely
* broken: see the manpage of FreeBSD.
*
* * On some OS such as Mac OS, there is no modular mode. Yet, as
* written above, <code>crypt(3)</code> on Mac OS never fails.
* This means even if you build up a proper salt string it
* generates a traditional DES hash anyways, and there is no way
* for you to be aware of.
*
* "foo".crypt("$5$rounds=1000$salt$") # => "$5fNPQMxC5j6."
*
* If for some reason you cannot migrate to other secure contemporary
* password hashing algorithms, install the string-crypt gem and
* <code>require 'string/crypt'</code> to continue using it.
*/
static VALUE
rb_str_crypt(VALUE str, VALUE salt)
{
#ifdef HAVE_CRYPT_R
VALUE databuf;
struct crypt_data *data;
# define CRYPT_END() ALLOCV_END(databuf)
#else
extern char *crypt(const char *, const char *);
# define CRYPT_END() rb_nativethread_lock_unlock(&crypt_mutex.lock)
#endif
VALUE result;
const char *s, *saltp;
char *res;
#ifdef BROKEN_CRYPT
char salt_8bit_clean[3];
#endif
StringValue(salt);
mustnot_wchar(str);
mustnot_wchar(salt);
s = StringValueCStr(str);
saltp = RSTRING_PTR(salt);
if (RSTRING_LEN(salt) < 2 || !saltp[0] || !saltp[1]) {
rb_raise(rb_eArgError, "salt too short (need >=2 bytes)");
}
#ifdef BROKEN_CRYPT
if (!ISASCII((unsigned char)saltp[0]) || !ISASCII((unsigned char)saltp[1])) {
salt_8bit_clean[0] = saltp[0] & 0x7f;
salt_8bit_clean[1] = saltp[1] & 0x7f;
salt_8bit_clean[2] = '\0';
saltp = salt_8bit_clean;
}
#endif
#ifdef HAVE_CRYPT_R
data = ALLOCV(databuf, sizeof(struct crypt_data));
# ifdef HAVE_STRUCT_CRYPT_DATA_INITIALIZED
data->initialized = 0;
# endif
res = crypt_r(s, saltp, data);
#else
crypt_mutex_initialize();
rb_nativethread_lock_lock(&crypt_mutex.lock);
res = crypt(s, saltp);
#endif
if (!res) {
int err = errno;
CRYPT_END();
rb_syserr_fail(err, "crypt");
}
result = rb_str_new_cstr(res);
CRYPT_END();
return result;
}
/*
* call-seq:
* str.ord -> integer
*
* Returns the Integer ordinal of a one-character string.
*
* "a".ord #=> 97
*/
static VALUE
rb_str_ord(VALUE s)
{
unsigned int c;
c = rb_enc_codepoint(RSTRING_PTR(s), RSTRING_END(s), STR_ENC_GET(s));
return UINT2NUM(c);
}
/*
* call-seq:
* str.sum(n=16) -> integer
*
* Returns a basic <em>n</em>-bit checksum of the characters in <i>str</i>,
* where <em>n</em> is the optional Integer parameter, defaulting
* to 16. The result is simply the sum of the binary value of each byte in
* <i>str</i> modulo <code>2**n - 1</code>. This is not a particularly good
* checksum.
*/
static VALUE
rb_str_sum(int argc, VALUE *argv, VALUE str)
{
int bits = 16;
char *ptr, *p, *pend;
long len;
VALUE sum = INT2FIX(0);
unsigned long sum0 = 0;
if (rb_check_arity(argc, 0, 1) && (bits = NUM2INT(argv[0])) < 0) {
bits = 0;
}
ptr = p = RSTRING_PTR(str);
len = RSTRING_LEN(str);
pend = p + len;
while (p < pend) {
if (FIXNUM_MAX - UCHAR_MAX < sum0) {
sum = rb_funcall(sum, '+', 1, LONG2FIX(sum0));
str_mod_check(str, ptr, len);
sum0 = 0;
}
sum0 += (unsigned char)*p;
p++;
}
if (bits == 0) {
if (sum0) {
sum = rb_funcall(sum, '+', 1, LONG2FIX(sum0));
}
}
else {
if (sum == INT2FIX(0)) {
if (bits < (int)sizeof(long)*CHAR_BIT) {
sum0 &= (((unsigned long)1)<<bits)-1;
}
sum = LONG2FIX(sum0);
}
else {
VALUE mod;
if (sum0) {
sum = rb_funcall(sum, '+', 1, LONG2FIX(sum0));
}
mod = rb_funcall(INT2FIX(1), idLTLT, 1, INT2FIX(bits));
mod = rb_funcall(mod, '-', 1, INT2FIX(1));
sum = rb_funcall(sum, '&', 1, mod);
}
}
return sum;
}
static VALUE
rb_str_justify(int argc, VALUE *argv, VALUE str, char jflag)
{
rb_encoding *enc;
VALUE w;
long width, len, flen = 1, fclen = 1;
VALUE res;
char *p;
const char *f = " ";
long n, size, llen, rlen, llen2 = 0, rlen2 = 0;
VALUE pad;
int singlebyte = 1, cr;
int termlen;
rb_scan_args(argc, argv, "11", &w, &pad);
enc = STR_ENC_GET(str);
termlen = rb_enc_mbminlen(enc);
width = NUM2LONG(w);
if (argc == 2) {
StringValue(pad);
enc = rb_enc_check(str, pad);
f = RSTRING_PTR(pad);
flen = RSTRING_LEN(pad);
fclen = str_strlen(pad, enc); /* rb_enc_check */
singlebyte = single_byte_optimizable(pad);
if (flen == 0 || fclen == 0) {
rb_raise(rb_eArgError, "zero width padding");
}
}
len = str_strlen(str, enc); /* rb_enc_check */
if (width < 0 || len >= width) return str_duplicate(rb_cString, str);
n = width - len;
llen = (jflag == 'l') ? 0 : ((jflag == 'r') ? n : n/2);
rlen = n - llen;
cr = ENC_CODERANGE(str);
if (flen > 1) {
llen2 = str_offset(f, f + flen, llen % fclen, enc, singlebyte);
rlen2 = str_offset(f, f + flen, rlen % fclen, enc, singlebyte);
}
size = RSTRING_LEN(str);
if ((len = llen / fclen + rlen / fclen) >= LONG_MAX / flen ||
(len *= flen) >= LONG_MAX - llen2 - rlen2 ||
(len += llen2 + rlen2) >= LONG_MAX - size) {
rb_raise(rb_eArgError, "argument too big");
}
len += size;
res = str_new0(rb_cString, 0, len, termlen);
p = RSTRING_PTR(res);
if (flen <= 1) {
memset(p, *f, llen);
p += llen;
}
else {
while (llen >= fclen) {
memcpy(p,f,flen);
p += flen;
llen -= fclen;
}
if (llen > 0) {
memcpy(p, f, llen2);
p += llen2;
}
}
memcpy(p, RSTRING_PTR(str), size);
p += size;
if (flen <= 1) {
memset(p, *f, rlen);
p += rlen;
}
else {
while (rlen >= fclen) {
memcpy(p,f,flen);
p += flen;
rlen -= fclen;
}
if (rlen > 0) {
memcpy(p, f, rlen2);
p += rlen2;
}
}
TERM_FILL(p, termlen);
STR_SET_LEN(res, p-RSTRING_PTR(res));
rb_enc_associate(res, enc);
if (argc == 2)
cr = ENC_CODERANGE_AND(cr, ENC_CODERANGE(pad));
if (cr != ENC_CODERANGE_BROKEN)
ENC_CODERANGE_SET(res, cr);
RB_GC_GUARD(pad);
return res;
}
/*
* call-seq:
* str.ljust(integer, padstr=' ') -> new_str
*
* If <i>integer</i> is greater than the length of <i>str</i>, returns a new
* String of length <i>integer</i> with <i>str</i> left justified
* and padded with <i>padstr</i>; otherwise, returns <i>str</i>.
*
* "hello".ljust(4) #=> "hello"
* "hello".ljust(20) #=> "hello "
* "hello".ljust(20, '1234') #=> "hello123412341234123"
*/
static VALUE
rb_str_ljust(int argc, VALUE *argv, VALUE str)
{
return rb_str_justify(argc, argv, str, 'l');
}
/*
* call-seq:
* str.rjust(integer, padstr=' ') -> new_str
*
* If <i>integer</i> is greater than the length of <i>str</i>, returns a new
* String of length <i>integer</i> with <i>str</i> right justified
* and padded with <i>padstr</i>; otherwise, returns <i>str</i>.
*
* "hello".rjust(4) #=> "hello"
* "hello".rjust(20) #=> " hello"
* "hello".rjust(20, '1234') #=> "123412341234123hello"
*/
static VALUE
rb_str_rjust(int argc, VALUE *argv, VALUE str)
{
return rb_str_justify(argc, argv, str, 'r');
}
/*
* call-seq:
* str.center(width, padstr=' ') -> new_str
*
* Centers +str+ in +width+. If +width+ is greater than the length of +str+,
* returns a new String of length +width+ with +str+ centered and padded with
* +padstr+; otherwise, returns +str+.
*
* "hello".center(4) #=> "hello"
* "hello".center(20) #=> " hello "
* "hello".center(20, '123') #=> "1231231hello12312312"
*/
static VALUE
rb_str_center(int argc, VALUE *argv, VALUE str)
{
return rb_str_justify(argc, argv, str, 'c');
}
/*
* call-seq:
* str.partition(sep) -> [head, sep, tail]
* str.partition(regexp) -> [head, match, tail]
*
* Searches <i>sep</i> or pattern (<i>regexp</i>) in the string
* and returns the part before it, the match, and the part
* after it.
* If it is not found, returns two empty strings and <i>str</i>.
*
* "hello".partition("l") #=> ["he", "l", "lo"]
* "hello".partition("x") #=> ["hello", "", ""]
* "hello".partition(/.l/) #=> ["h", "el", "lo"]
*/
static VALUE
rb_str_partition(VALUE str, VALUE sep)
{
long pos;
sep = get_pat_quoted(sep, 0);
if (RB_TYPE_P(sep, T_REGEXP)) {
if (rb_reg_search(sep, str, 0, 0) < 0) {
goto failed;
}
VALUE match = rb_backref_get();
struct re_registers *regs = RMATCH_REGS(match);
pos = BEG(0);
sep = rb_str_subseq(str, pos, END(0) - pos);
}
else {
pos = rb_str_index(str, sep, 0);
if (pos < 0) goto failed;
}
return rb_ary_new3(3, rb_str_subseq(str, 0, pos),
sep,
rb_str_subseq(str, pos+RSTRING_LEN(sep),
RSTRING_LEN(str)-pos-RSTRING_LEN(sep)));
failed:
return rb_ary_new3(3, str_duplicate(rb_cString, str), str_new_empty_String(str), str_new_empty_String(str));
}
/*
* call-seq:
* str.rpartition(sep) -> [head, sep, tail]
* str.rpartition(regexp) -> [head, match, tail]
*
* Searches <i>sep</i> or pattern (<i>regexp</i>) in the string from the end
* of the string, and returns the part before it, the match, and the part
* after it.
* If it is not found, returns two empty strings and <i>str</i>.
*
* "hello".rpartition("l") #=> ["hel", "l", "o"]
* "hello".rpartition("x") #=> ["", "", "hello"]
* "hello".rpartition(/.l/) #=> ["he", "ll", "o"]
*/
static VALUE
rb_str_rpartition(VALUE str, VALUE sep)
{
long pos = RSTRING_LEN(str);
sep = get_pat_quoted(sep, 0);
if (RB_TYPE_P(sep, T_REGEXP)) {
if (rb_reg_search(sep, str, pos, 1) < 0) {
goto failed;
}
VALUE match = rb_backref_get();
struct re_registers *regs = RMATCH_REGS(match);
pos = BEG(0);
sep = rb_str_subseq(str, pos, END(0) - pos);
}
else {
pos = rb_str_sublen(str, pos);
pos = rb_str_rindex(str, sep, pos);
if (pos < 0) {
goto failed;
}
pos = rb_str_offset(str, pos);
}
return rb_ary_new3(3, rb_str_subseq(str, 0, pos),
sep,
rb_str_subseq(str, pos+RSTRING_LEN(sep),
RSTRING_LEN(str)-pos-RSTRING_LEN(sep)));
failed:
return rb_ary_new3(3, str_new_empty_String(str), str_new_empty_String(str), str_duplicate(rb_cString, str));
}
/*
* call-seq:
* str.start_with?([prefixes]+) -> true or false
*
* Returns true if +str+ starts with one of the +prefixes+ given.
* Each of the +prefixes+ should be a String or a Regexp.
*
* "hello".start_with?("hell") #=> true
* "hello".start_with?(/H/i) #=> true
*
* # returns true if one of the prefixes matches.
* "hello".start_with?("heaven", "hell") #=> true
* "hello".start_with?("heaven", "paradise") #=> false
*/
static VALUE
rb_str_start_with(int argc, VALUE *argv, VALUE str)
{
int i;
for (i=0; i<argc; i++) {
VALUE tmp = argv[i];
if (RB_TYPE_P(tmp, T_REGEXP)) {
if (rb_reg_start_with_p(tmp, str))
return Qtrue;
}
else {
StringValue(tmp);
rb_enc_check(str, tmp);
if (RSTRING_LEN(str) < RSTRING_LEN(tmp)) continue;
if (memcmp(RSTRING_PTR(str), RSTRING_PTR(tmp), RSTRING_LEN(tmp)) == 0)
return Qtrue;
}
}
return Qfalse;
}
/*
* call-seq:
* str.end_with?([suffixes]+) -> true or false
*
* Returns true if +str+ ends with one of the +suffixes+ given.
*
* "hello".end_with?("ello") #=> true
*
* # returns true if one of the +suffixes+ matches.
* "hello".end_with?("heaven", "ello") #=> true
* "hello".end_with?("heaven", "paradise") #=> false
*/
static VALUE
rb_str_end_with(int argc, VALUE *argv, VALUE str)
{
int i;
char *p, *s, *e;
rb_encoding *enc;
for (i=0; i<argc; i++) {
VALUE tmp = argv[i];
long slen, tlen;
StringValue(tmp);
enc = rb_enc_check(str, tmp);
if ((tlen = RSTRING_LEN(tmp)) == 0) return Qtrue;
if ((slen = RSTRING_LEN(str)) < tlen) continue;
p = RSTRING_PTR(str);
e = p + slen;
s = e - tlen;
if (rb_enc_left_char_head(p, s, e, enc) != s)
continue;
if (memcmp(s, RSTRING_PTR(tmp), RSTRING_LEN(tmp)) == 0)
return Qtrue;
}
return Qfalse;
}
/*!
* Returns the length of the <i>prefix</i> to be deleted in the given <i>str</i>,
* returning 0 if <i>str</i> does not start with the <i>prefix</i>.
*
* @param str the target
* @param prefix the prefix
* @retval 0 if the given <i>str</i> does not start with the given <i>prefix</i>
* @retval Positive-Integer otherwise
*/
static long
deleted_prefix_length(VALUE str, VALUE prefix)
{
char *strptr, *prefixptr;
long olen, prefixlen;
StringValue(prefix);
if (is_broken_string(prefix)) return 0;
rb_enc_check(str, prefix);
/* return 0 if not start with prefix */
prefixlen = RSTRING_LEN(prefix);
if (prefixlen <= 0) return 0;
olen = RSTRING_LEN(str);
if (olen < prefixlen) return 0;
strptr = RSTRING_PTR(str);
prefixptr = RSTRING_PTR(prefix);
if (memcmp(strptr, prefixptr, prefixlen) != 0) return 0;
return prefixlen;
}
/*
* call-seq:
* str.delete_prefix!(prefix) -> self or nil
*
* Deletes leading <code>prefix</code> from <i>str</i>, returning
* <code>nil</code> if no change was made.
*
* "hello".delete_prefix!("hel") #=> "lo"
* "hello".delete_prefix!("llo") #=> nil
*/
static VALUE
rb_str_delete_prefix_bang(VALUE str, VALUE prefix)
{
long prefixlen;
str_modify_keep_cr(str);
prefixlen = deleted_prefix_length(str, prefix);
if (prefixlen <= 0) return Qnil;
return rb_str_drop_bytes(str, prefixlen);
}
/*
* call-seq:
* str.delete_prefix(prefix) -> new_str
*
* Returns a copy of <i>str</i> with leading <code>prefix</code> deleted.
*
* "hello".delete_prefix("hel") #=> "lo"
* "hello".delete_prefix("llo") #=> "hello"
*/
static VALUE
rb_str_delete_prefix(VALUE str, VALUE prefix)
{
long prefixlen;
prefixlen = deleted_prefix_length(str, prefix);
if (prefixlen <= 0) return str_duplicate(rb_cString, str);
return rb_str_subseq(str, prefixlen, RSTRING_LEN(str) - prefixlen);
}
/*!
* Returns the length of the <i>suffix</i> to be deleted in the given <i>str</i>,
* returning 0 if <i>str</i> does not end with the <i>suffix</i>.
*
* @param str the target
* @param suffix the suffix
* @retval 0 if the given <i>str</i> does not end with the given <i>suffix</i>
* @retval Positive-Integer otherwise
*/
static long
deleted_suffix_length(VALUE str, VALUE suffix)
{
char *strptr, *suffixptr, *s;
long olen, suffixlen;
rb_encoding *enc;
StringValue(suffix);
if (is_broken_string(suffix)) return 0;
enc = rb_enc_check(str, suffix);
/* return 0 if not start with suffix */
suffixlen = RSTRING_LEN(suffix);
if (suffixlen <= 0) return 0;
olen = RSTRING_LEN(str);
if (olen < suffixlen) return 0;
strptr = RSTRING_PTR(str);
suffixptr = RSTRING_PTR(suffix);
s = strptr + olen - suffixlen;
if (memcmp(s, suffixptr, suffixlen) != 0) return 0;
if (rb_enc_left_char_head(strptr, s, strptr + olen, enc) != s) return 0;
return suffixlen;
}
/*
* call-seq:
* str.delete_suffix!(suffix) -> self or nil
*
* Deletes trailing <code>suffix</code> from <i>str</i>, returning
* <code>nil</code> if no change was made.
*
* "hello".delete_suffix!("llo") #=> "he"
* "hello".delete_suffix!("hel") #=> nil
*/
static VALUE
rb_str_delete_suffix_bang(VALUE str, VALUE suffix)
{
long olen, suffixlen, len;
str_modifiable(str);
suffixlen = deleted_suffix_length(str, suffix);
if (suffixlen <= 0) return Qnil;
olen = RSTRING_LEN(str);
str_modify_keep_cr(str);
len = olen - suffixlen;
STR_SET_LEN(str, len);
TERM_FILL(&RSTRING_PTR(str)[len], TERM_LEN(str));
if (ENC_CODERANGE(str) != ENC_CODERANGE_7BIT) {
ENC_CODERANGE_CLEAR(str);
}
return str;
}
/*
* call-seq:
* str.delete_suffix(suffix) -> new_str
*
* Returns a copy of <i>str</i> with trailing <code>suffix</code> deleted.
*
* "hello".delete_suffix("llo") #=> "he"
* "hello".delete_suffix("hel") #=> "hello"
*/
static VALUE
rb_str_delete_suffix(VALUE str, VALUE suffix)
{
long suffixlen;
suffixlen = deleted_suffix_length(str, suffix);
if (suffixlen <= 0) return str_duplicate(rb_cString, str);
return rb_str_subseq(str, 0, RSTRING_LEN(str) - suffixlen);
}
void
rb_str_setter(VALUE val, ID id, VALUE *var)
{
if (!NIL_P(val) && !RB_TYPE_P(val, T_STRING)) {
rb_raise(rb_eTypeError, "value of %"PRIsVALUE" must be String", rb_id2str(id));
}
*var = val;
}
static void
rb_fs_setter(VALUE val, ID id, VALUE *var)
{
val = rb_fs_check(val);
if (!val) {
rb_raise(rb_eTypeError,
"value of %"PRIsVALUE" must be String or Regexp",
rb_id2str(id));
}
if (!NIL_P(val)) {
rb_warn_deprecated("`$;'", NULL);
}
*var = val;
}
/*
* call-seq:
* str.force_encoding(encoding) -> str
*
* Changes the encoding to +encoding+ and returns self.
*/
static VALUE
rb_str_force_encoding(VALUE str, VALUE enc)
{
str_modifiable(str);
rb_enc_associate(str, rb_to_encoding(enc));
ENC_CODERANGE_CLEAR(str);
return str;
}
/*
* call-seq:
* str.b -> str
*
* Returns a copied string whose encoding is ASCII-8BIT.
*/
static VALUE
rb_str_b(VALUE str)
{
VALUE str2;
if (FL_TEST(str, STR_NOEMBED)) {
str2 = str_alloc_heap(rb_cString);
}
else {
str2 = str_alloc_embed(rb_cString, RSTRING_EMBED_LEN(str) + TERM_LEN(str));
}
str_replace_shared_without_enc(str2, str);
ENC_CODERANGE_CLEAR(str2);
return str2;
}
/*
* call-seq:
* str.valid_encoding? -> true or false
*
* Returns true for a string which is encoded correctly.
*
* "\xc2\xa1".force_encoding("UTF-8").valid_encoding? #=> true
* "\xc2".force_encoding("UTF-8").valid_encoding? #=> false
* "\x80".force_encoding("UTF-8").valid_encoding? #=> false
*/
static VALUE
rb_str_valid_encoding_p(VALUE str)
{
int cr = rb_enc_str_coderange(str);
return RBOOL(cr != ENC_CODERANGE_BROKEN);
}
/*
* call-seq:
* str.ascii_only? -> true or false
*
* Returns true for a string which has only ASCII characters.
*
* "abc".force_encoding("UTF-8").ascii_only? #=> true
* "abc\u{6666}".force_encoding("UTF-8").ascii_only? #=> false
*/
static VALUE
rb_str_is_ascii_only_p(VALUE str)
{
int cr = rb_enc_str_coderange(str);
return RBOOL(cr == ENC_CODERANGE_7BIT);
}
VALUE
rb_str_ellipsize(VALUE str, long len)
{
static const char ellipsis[] = "...";
const long ellipsislen = sizeof(ellipsis) - 1;
rb_encoding *const enc = rb_enc_get(str);
const long blen = RSTRING_LEN(str);
const char *const p = RSTRING_PTR(str), *e = p + blen;
VALUE estr, ret = 0;
if (len < 0) rb_raise(rb_eIndexError, "negative length %ld", len);
if (len * rb_enc_mbminlen(enc) >= blen ||
(e = rb_enc_nth(p, e, len, enc)) - p == blen) {
ret = str;
}
else if (len <= ellipsislen ||
!(e = rb_enc_step_back(p, e, e, len = ellipsislen, enc))) {
if (rb_enc_asciicompat(enc)) {
ret = rb_str_new(ellipsis, len);
rb_enc_associate(ret, enc);
}
else {
estr = rb_usascii_str_new(ellipsis, len);
ret = rb_str_encode(estr, rb_enc_from_encoding(enc), 0, Qnil);
}
}
else if (ret = rb_str_subseq(str, 0, e - p), rb_enc_asciicompat(enc)) {
rb_str_cat(ret, ellipsis, ellipsislen);
}
else {
estr = rb_str_encode(rb_usascii_str_new(ellipsis, ellipsislen),
rb_enc_from_encoding(enc), 0, Qnil);
rb_str_append(ret, estr);
}
return ret;
}
static VALUE
str_compat_and_valid(VALUE str, rb_encoding *enc)
{
int cr;
str = StringValue(str);
cr = rb_enc_str_coderange(str);
if (cr == ENC_CODERANGE_BROKEN) {
rb_raise(rb_eArgError, "replacement must be valid byte sequence '%+"PRIsVALUE"'", str);
}
else {
rb_encoding *e = STR_ENC_GET(str);
if (cr == ENC_CODERANGE_7BIT ? rb_enc_mbminlen(enc) != 1 : enc != e) {
rb_raise(rb_eEncCompatError, "incompatible character encodings: %s and %s",
rb_enc_name(enc), rb_enc_name(e));
}
}
return str;
}
static VALUE enc_str_scrub(rb_encoding *enc, VALUE str, VALUE repl, int cr);
VALUE
rb_str_scrub(VALUE str, VALUE repl)
{
rb_encoding *enc = STR_ENC_GET(str);
return enc_str_scrub(enc, str, repl, ENC_CODERANGE(str));
}
VALUE
rb_enc_str_scrub(rb_encoding *enc, VALUE str, VALUE repl)
{
int cr = ENC_CODERANGE_UNKNOWN;
if (enc == STR_ENC_GET(str)) {
/* cached coderange makes sense only when enc equals the
* actual encoding of str */
cr = ENC_CODERANGE(str);
}
return enc_str_scrub(enc, str, repl, cr);
}
static VALUE
enc_str_scrub(rb_encoding *enc, VALUE str, VALUE repl, int cr)
{
int encidx;
VALUE buf = Qnil;
const char *rep, *p, *e, *p1, *sp;
long replen = -1;
long slen;
if (rb_block_given_p()) {
if (!NIL_P(repl))
rb_raise(rb_eArgError, "both of block and replacement given");
replen = 0;
}
if (ENC_CODERANGE_CLEAN_P(cr))
return Qnil;
if (!NIL_P(repl)) {
repl = str_compat_and_valid(repl, enc);
}
if (rb_enc_dummy_p(enc)) {
return Qnil;
}
encidx = rb_enc_to_index(enc);
#define DEFAULT_REPLACE_CHAR(str) do { \
static const char replace[sizeof(str)-1] = str; \
rep = replace; replen = (int)sizeof(replace); \
} while (0)
slen = RSTRING_LEN(str);
p = RSTRING_PTR(str);
e = RSTRING_END(str);
p1 = p;
sp = p;
if (rb_enc_asciicompat(enc)) {
int rep7bit_p;
if (!replen) {
rep = NULL;
rep7bit_p = FALSE;
}
else if (!NIL_P(repl)) {
rep = RSTRING_PTR(repl);
replen = RSTRING_LEN(repl);
rep7bit_p = (ENC_CODERANGE(repl) == ENC_CODERANGE_7BIT);
}
else if (encidx == rb_utf8_encindex()) {
DEFAULT_REPLACE_CHAR("\xEF\xBF\xBD");
rep7bit_p = FALSE;
}
else {
DEFAULT_REPLACE_CHAR("?");
rep7bit_p = TRUE;
}
cr = ENC_CODERANGE_7BIT;
p = search_nonascii(p, e);
if (!p) {
p = e;
}
while (p < e) {
int ret = rb_enc_precise_mbclen(p, e, enc);
if (MBCLEN_NEEDMORE_P(ret)) {
break;
}
else if (MBCLEN_CHARFOUND_P(ret)) {
cr = ENC_CODERANGE_VALID;
p += MBCLEN_CHARFOUND_LEN(ret);
}
else if (MBCLEN_INVALID_P(ret)) {
/*
* p1~p: valid ascii/multibyte chars
* p ~e: invalid bytes + unknown bytes
*/
long clen = rb_enc_mbmaxlen(enc);
if (NIL_P(buf)) buf = rb_str_buf_new(RSTRING_LEN(str));
if (p > p1) {
rb_str_buf_cat(buf, p1, p - p1);
}
if (e - p < clen) clen = e - p;
if (clen <= 2) {
clen = 1;
}
else {
const char *q = p;
clen--;
for (; clen > 1; clen--) {
ret = rb_enc_precise_mbclen(q, q + clen, enc);
if (MBCLEN_NEEDMORE_P(ret)) break;
if (MBCLEN_INVALID_P(ret)) continue;
UNREACHABLE;
}
}
if (rep) {
rb_str_buf_cat(buf, rep, replen);
if (!rep7bit_p) cr = ENC_CODERANGE_VALID;
}
else {
repl = rb_yield(rb_enc_str_new(p, clen, enc));
str_mod_check(str, sp, slen);
repl = str_compat_and_valid(repl, enc);
rb_str_buf_cat(buf, RSTRING_PTR(repl), RSTRING_LEN(repl));
if (ENC_CODERANGE(repl) == ENC_CODERANGE_VALID)
cr = ENC_CODERANGE_VALID;
}
p += clen;
p1 = p;
p = search_nonascii(p, e);
if (!p) {
p = e;
break;
}
}
else {
UNREACHABLE;
}
}
if (NIL_P(buf)) {
if (p == e) {
ENC_CODERANGE_SET(str, cr);
return Qnil;
}
buf = rb_str_buf_new(RSTRING_LEN(str));
}
if (p1 < p) {
rb_str_buf_cat(buf, p1, p - p1);
}
if (p < e) {
if (rep) {
rb_str_buf_cat(buf, rep, replen);
if (!rep7bit_p) cr = ENC_CODERANGE_VALID;
}
else {
repl = rb_yield(rb_enc_str_new(p, e-p, enc));
str_mod_check(str, sp, slen);
repl = str_compat_and_valid(repl, enc);
rb_str_buf_cat(buf, RSTRING_PTR(repl), RSTRING_LEN(repl));
if (ENC_CODERANGE(repl) == ENC_CODERANGE_VALID)
cr = ENC_CODERANGE_VALID;
}
}
}
else {
/* ASCII incompatible */
long mbminlen = rb_enc_mbminlen(enc);
if (!replen) {
rep = NULL;
}
else if (!NIL_P(repl)) {
rep = RSTRING_PTR(repl);
replen = RSTRING_LEN(repl);
}
else if (encidx == ENCINDEX_UTF_16BE) {
DEFAULT_REPLACE_CHAR("\xFF\xFD");
}
else if (encidx == ENCINDEX_UTF_16LE) {
DEFAULT_REPLACE_CHAR("\xFD\xFF");
}
else if (encidx == ENCINDEX_UTF_32BE) {
DEFAULT_REPLACE_CHAR("\x00\x00\xFF\xFD");
}
else if (encidx == ENCINDEX_UTF_32LE) {
DEFAULT_REPLACE_CHAR("\xFD\xFF\x00\x00");
}
else {
DEFAULT_REPLACE_CHAR("?");
}
while (p < e) {
int ret = rb_enc_precise_mbclen(p, e, enc);
if (MBCLEN_NEEDMORE_P(ret)) {
break;
}
else if (MBCLEN_CHARFOUND_P(ret)) {
p += MBCLEN_CHARFOUND_LEN(ret);
}
else if (MBCLEN_INVALID_P(ret)) {
const char *q = p;
long clen = rb_enc_mbmaxlen(enc);
if (NIL_P(buf)) buf = rb_str_buf_new(RSTRING_LEN(str));
if (p > p1) rb_str_buf_cat(buf, p1, p - p1);
if (e - p < clen) clen = e - p;
if (clen <= mbminlen * 2) {
clen = mbminlen;
}
else {
clen -= mbminlen;
for (; clen > mbminlen; clen-=mbminlen) {
ret = rb_enc_precise_mbclen(q, q + clen, enc);
if (MBCLEN_NEEDMORE_P(ret)) break;
if (MBCLEN_INVALID_P(ret)) continue;
UNREACHABLE;
}
}
if (rep) {
rb_str_buf_cat(buf, rep, replen);
}
else {
repl = rb_yield(rb_enc_str_new(p, clen, enc));
str_mod_check(str, sp, slen);
repl = str_compat_and_valid(repl, enc);
rb_str_buf_cat(buf, RSTRING_PTR(repl), RSTRING_LEN(repl));
}
p += clen;
p1 = p;
}
else {
UNREACHABLE;
}
}
if (NIL_P(buf)) {
if (p == e) {
ENC_CODERANGE_SET(str, ENC_CODERANGE_VALID);
return Qnil;
}
buf = rb_str_buf_new(RSTRING_LEN(str));
}
if (p1 < p) {
rb_str_buf_cat(buf, p1, p - p1);
}
if (p < e) {
if (rep) {
rb_str_buf_cat(buf, rep, replen);
}
else {
repl = rb_yield(rb_enc_str_new(p, e-p, enc));
str_mod_check(str, sp, slen);
repl = str_compat_and_valid(repl, enc);
rb_str_buf_cat(buf, RSTRING_PTR(repl), RSTRING_LEN(repl));
}
}
cr = ENC_CODERANGE_VALID;
}
ENCODING_CODERANGE_SET(buf, rb_enc_to_index(enc), cr);
return buf;
}
/*
* call-seq:
* str.scrub -> new_str
* str.scrub(repl) -> new_str
* str.scrub{|bytes|} -> new_str
*
* If the string is invalid byte sequence then replace invalid bytes with given replacement
* character, else returns self.
* If block is given, replace invalid bytes with returned value of the block.
*
* "abc\u3042\x81".scrub #=> "abc\u3042\uFFFD"
* "abc\u3042\x81".scrub("*") #=> "abc\u3042*"
* "abc\u3042\xE3\x80".scrub{|bytes| '<'+bytes.unpack1('H*')+'>' } #=> "abc\u3042<e380>"
*/
static VALUE
str_scrub(int argc, VALUE *argv, VALUE str)
{
VALUE repl = argc ? (rb_check_arity(argc, 0, 1), argv[0]) : Qnil;
VALUE new = rb_str_scrub(str, repl);
return NIL_P(new) ? str_duplicate(rb_cString, str): new;
}
/*
* call-seq:
* str.scrub! -> str
* str.scrub!(repl) -> str
* str.scrub!{|bytes|} -> str
*
* If the string is invalid byte sequence then replace invalid bytes with given replacement
* character, else returns self.
* If block is given, replace invalid bytes with returned value of the block.
*
* "abc\u3042\x81".scrub! #=> "abc\u3042\uFFFD"
* "abc\u3042\x81".scrub!("*") #=> "abc\u3042*"
* "abc\u3042\xE3\x80".scrub!{|bytes| '<'+bytes.unpack1('H*')+'>' } #=> "abc\u3042<e380>"
*/
static VALUE
str_scrub_bang(int argc, VALUE *argv, VALUE str)
{
VALUE repl = argc ? (rb_check_arity(argc, 0, 1), argv[0]) : Qnil;
VALUE new = rb_str_scrub(str, repl);
if (!NIL_P(new)) rb_str_replace(str, new);
return str;
}
static ID id_normalize;
static ID id_normalized_p;
static VALUE mUnicodeNormalize;
static VALUE
unicode_normalize_common(int argc, VALUE *argv, VALUE str, ID id)
{
static int UnicodeNormalizeRequired = 0;
VALUE argv2[2];
if (!UnicodeNormalizeRequired) {
rb_require("unicode_normalize/normalize.rb");
UnicodeNormalizeRequired = 1;
}
argv2[0] = str;
if (rb_check_arity(argc, 0, 1)) argv2[1] = argv[0];
return rb_funcallv(mUnicodeNormalize, id, argc+1, argv2);
}
/*
* call-seq:
* str.unicode_normalize(form=:nfc)
*
* Unicode Normalization---Returns a normalized form of +str+,
* using Unicode normalizations NFC, NFD, NFKC, or NFKD.
* The normalization form used is determined by +form+, which can
* be any of the four values +:nfc+, +:nfd+, +:nfkc+, or +:nfkd+.
* The default is +:nfc+.
*
* If the string is not in a Unicode Encoding, then an Exception is raised.
* In this context, 'Unicode Encoding' means any of UTF-8, UTF-16BE/LE,
* and UTF-32BE/LE, as well as GB18030, UCS_2BE, and UCS_4BE.
* Anything other than UTF-8 is implemented by converting to UTF-8,
* which makes it slower than UTF-8.
*
* "a\u0300".unicode_normalize #=> "\u00E0"
* "a\u0300".unicode_normalize(:nfc) #=> "\u00E0"
* "\u00E0".unicode_normalize(:nfd) #=> "a\u0300"
* "\xE0".force_encoding('ISO-8859-1').unicode_normalize(:nfd)
* #=> Encoding::CompatibilityError raised
*/
static VALUE
rb_str_unicode_normalize(int argc, VALUE *argv, VALUE str)
{
return unicode_normalize_common(argc, argv, str, id_normalize);
}
/*
* call-seq:
* str.unicode_normalize!(form=:nfc)
*
* Destructive version of String#unicode_normalize, doing Unicode
* normalization in place.
*/
static VALUE
rb_str_unicode_normalize_bang(int argc, VALUE *argv, VALUE str)
{
return rb_str_replace(str, unicode_normalize_common(argc, argv, str, id_normalize));
}
/* call-seq:
* str.unicode_normalized?(form=:nfc)
*
* Checks whether +str+ is in Unicode normalization form +form+,
* which can be any of the four values +:nfc+, +:nfd+, +:nfkc+, or +:nfkd+.
* The default is +:nfc+.
*
* If the string is not in a Unicode Encoding, then an Exception is raised.
* For details, see String#unicode_normalize.
*
* "a\u0300".unicode_normalized? #=> false
* "a\u0300".unicode_normalized?(:nfd) #=> true
* "\u00E0".unicode_normalized? #=> true
* "\u00E0".unicode_normalized?(:nfd) #=> false
* "\xE0".force_encoding('ISO-8859-1').unicode_normalized?
* #=> Encoding::CompatibilityError raised
*/
static VALUE
rb_str_unicode_normalized_p(int argc, VALUE *argv, VALUE str)
{
return unicode_normalize_common(argc, argv, str, id_normalized_p);
}
/**********************************************************************
* Document-class: Symbol
*
* Symbol objects represent named identifiers inside the Ruby interpreter.
*
* You can create a \Symbol object explicitly with:
*
* - A {symbol literal}[doc/syntax/literals_rdoc.html#label-Symbol+Literals].
*
* The same Symbol object will be
* created for a given name or string for the duration of a program's
* execution, regardless of the context or meaning of that name. Thus
* if <code>Fred</code> is a constant in one context, a method in
* another, and a class in a third, the Symbol <code>:Fred</code>
* will be the same object in all three contexts.
*
* module One
* class Fred
* end
* $f1 = :Fred
* end
* module Two
* Fred = 1
* $f2 = :Fred
* end
* def Fred()
* end
* $f3 = :Fred
* $f1.object_id #=> 2514190
* $f2.object_id #=> 2514190
* $f3.object_id #=> 2514190
*
* Constant, method, and variable names are returned as symbols:
*
* module One
* Two = 2
* def three; 3 end
* @four = 4
* @@five = 5
* $six = 6
* end
* seven = 7
*
* One.constants
* # => [:Two]
* One.instance_methods(true)
* # => [:three]
* One.instance_variables
* # => [:@four]
* One.class_variables
* # => [:@@five]
* global_variables.grep(/six/)
* # => [:$six]
* local_variables
* # => [:seven]
*
* Symbol objects are different from String objects in that
* Symbol objects represent identifiers, while String objects
* represent text or data.
*
* == What's Here
*
* First, what's elsewhere. \Class \Symbol:
*
* - Inherits from {class Object}[Object.html#class-Object-label-What-27s+Here].
* - Includes {module Comparable}[Comparable.html#module-Comparable-label-What-27s+Here].
*
* Here, class \Symbol provides methods that are useful for:
*
* - {Querying}[#class-Symbol-label-Methods+for+Querying]
* - {Comparing}[#class-Symbol-label-Methods+for+Comparing]
* - {Converting}[#class-Symbol-label-Methods+for+Converting]
*
* === Methods for Querying
*
* - ::all_symbols:: Returns an array of the symbols currently in Ruby's symbol table.
* - {#=~}[#method-i-3D~]:: Returns the index of the first substring
* in symbol that matches a given Regexp
* or other object; returns +nil+ if no match is found.
* - #[], #slice :: Returns a substring of symbol
* determined by a given index, start/length, or range, or string.
* - #empty?:: Returns +true+ if +self.length+ is zero; +false+ otherwise.
* - #encoding:: Returns the Encoding object that represents the encoding
* of symbol.
* - #end_with?:: Returns +true+ if symbol ends with
* any of the given strings.
* - #match:: Returns a MatchData object if symbol
* matches a given Regexp; +nil+ otherwise.
* - #match?:: Returns +true+ if symbol
* matches a given Regexp; +false+ otherwise.
* - #length, #size:: Returns the number of characters in symbol.
* - #start_with?:: Returns +true+ if symbol starts with
* any of the given strings.
*
* === Methods for Comparing
*
* - {#<=>}[#method-i-3C-3D-3E]:: Returns -1, 0, or 1 as a given symbol is smaller than, equal to, or larger than symbol.
* - {#==, #===}[#method-i-3D-3D]:: Returns +true+ if a given symbol
* has the same content and encoding.
* - #casecmp:: Ignoring case, returns -1, 0, or 1 as a given
* symbol is smaller than, equal to, or larger than symbol.
* - #casecmp?:: Returns +true+ if symbol is equal to a given symbol
* after Unicode case folding; +false+ otherwise.
*
* === Methods for Converting
*
* - #capitalize:: Returns symbol with the first character upcased
* and all other characters downcased.
* - #downcase:: Returns symbol with all characters downcased.
* - #inspect:: Returns the string representation of +self+ as a symbol literal.
* - #name:: Returns the frozen string corresponding to symbol.
* - #succ, #next:: Returns the symbol that is the successor to symbol.
* - #swapcase:: Returns symbol with all upcase characters downcased
* and all downcase characters upcased.
* - #to_proc:: Returns a Proc object which responds to the method named by symbol.
* - #to_s, #id2name:: Returns the string corresponding to +self+.
* - #to_sym, #intern:: Returns +self+.
* - #upcase:: Returns symbol with all characters upcased.
*
*/
/*
* call-seq:
* sym == obj -> true or false
*
* Equality---If <i>sym</i> and <i>obj</i> are exactly the same
* symbol, returns <code>true</code>.
*/
#define sym_equal rb_obj_equal
static int
sym_printable(const char *s, const char *send, rb_encoding *enc)
{
while (s < send) {
int n;
int c = rb_enc_precise_mbclen(s, send, enc);
if (!MBCLEN_CHARFOUND_P(c)) return FALSE;
n = MBCLEN_CHARFOUND_LEN(c);
c = rb_enc_mbc_to_codepoint(s, send, enc);
if (!rb_enc_isprint(c, enc)) return FALSE;
s += n;
}
return TRUE;
}
int
rb_str_symname_p(VALUE sym)
{
rb_encoding *enc;
const char *ptr;
long len;
rb_encoding *resenc = rb_default_internal_encoding();
if (resenc == NULL) resenc = rb_default_external_encoding();
enc = STR_ENC_GET(sym);
ptr = RSTRING_PTR(sym);
len = RSTRING_LEN(sym);
if ((resenc != enc && !rb_str_is_ascii_only_p(sym)) || len != (long)strlen(ptr) ||
!rb_enc_symname2_p(ptr, len, enc) || !sym_printable(ptr, ptr + len, enc)) {
return FALSE;
}
return TRUE;
}
VALUE
rb_str_quote_unprintable(VALUE str)
{
rb_encoding *enc;
const char *ptr;
long len;
rb_encoding *resenc;
Check_Type(str, T_STRING);
resenc = rb_default_internal_encoding();
if (resenc == NULL) resenc = rb_default_external_encoding();
enc = STR_ENC_GET(str);
ptr = RSTRING_PTR(str);
len = RSTRING_LEN(str);
if ((resenc != enc && !rb_str_is_ascii_only_p(str)) ||
!sym_printable(ptr, ptr + len, enc)) {
return rb_str_escape(str);
}
return str;
}
MJIT_FUNC_EXPORTED VALUE
rb_id_quote_unprintable(ID id)
{
VALUE str = rb_id2str(id);
if (!rb_str_symname_p(str)) {
return rb_str_escape(str);
}
return str;
}
/*
* call-seq:
* sym.inspect -> string
*
* Returns the representation of <i>sym</i> as a symbol literal.
*
* :fred.inspect #=> ":fred"
*/
static VALUE
sym_inspect(VALUE sym)
{
VALUE str = rb_sym2str(sym);
const char *ptr;
long len;
char *dest;
if (!rb_str_symname_p(str)) {
str = rb_str_inspect(str);
len = RSTRING_LEN(str);
rb_str_resize(str, len + 1);
dest = RSTRING_PTR(str);
memmove(dest + 1, dest, len);
}
else {
rb_encoding *enc = STR_ENC_GET(str);
RSTRING_GETMEM(str, ptr, len);
str = rb_enc_str_new(0, len + 1, enc);
dest = RSTRING_PTR(str);
memcpy(dest + 1, ptr, len);
}
dest[0] = ':';
return str;
}
#if 0 /* for RDoc */
/*
* call-seq:
* sym.name -> string
*
* Returns the name or string corresponding to <i>sym</i>. Unlike #to_s, the
* returned string is frozen.
*
* :fred.name #=> "fred"
* :fred.name.frozen? #=> true
* :fred.to_s #=> "fred"
* :fred.to_s.frozen? #=> false
*/
VALUE
rb_sym2str(VALUE sym)
{
}
#endif
/*
* call-seq:
* sym.id2name -> string
* sym.to_s -> string
*
* Returns the name or string corresponding to <i>sym</i>.
*
* :fred.id2name #=> "fred"
* :ginger.to_s #=> "ginger"
*
* Note that this string is not frozen (unlike the symbol itself).
* To get a frozen string, use #name.
*/
VALUE
rb_sym_to_s(VALUE sym)
{
return str_new_shared(rb_cString, rb_sym2str(sym));
}
/*
* call-seq:
* sym.to_sym -> sym
* sym.intern -> sym
*
* In general, <code>to_sym</code> returns the Symbol corresponding
* to an object. As <i>sym</i> is already a symbol, <code>self</code> is returned
* in this case.
*/
static VALUE
sym_to_sym(VALUE sym)
{
return sym;
}
MJIT_FUNC_EXPORTED VALUE
rb_sym_proc_call(ID mid, int argc, const VALUE *argv, int kw_splat, VALUE passed_proc)
{
VALUE obj;
if (argc < 1) {
rb_raise(rb_eArgError, "no receiver given");
}
obj = argv[0];
return rb_funcall_with_block_kw(obj, mid, argc - 1, argv + 1, passed_proc, kw_splat);
}
#if 0
/*
* call-seq:
* sym.to_proc
*
* Returns a _Proc_ object which responds to the given method by _sym_.
*
* (1..3).collect(&:to_s) #=> ["1", "2", "3"]
*/
VALUE
rb_sym_to_proc(VALUE sym)
{
}
#endif
/*
* call-seq:
*
* sym.succ
*
* Same as <code>sym.to_s.succ.intern</code>.
*/
static VALUE
sym_succ(VALUE sym)
{
return rb_str_intern(rb_str_succ(rb_sym2str(sym)));
}
/*
* call-seq:
*
* symbol <=> other_symbol -> -1, 0, +1, or nil
*
* Compares +symbol+ with +other_symbol+ after calling #to_s on each of the
* symbols. Returns -1, 0, +1, or +nil+ depending on whether +symbol+ is
* less than, equal to, or greater than +other_symbol+.
*
* +nil+ is returned if the two values are incomparable.
*
* See String#<=> for more information.
*/
static VALUE
sym_cmp(VALUE sym, VALUE other)
{
if (!SYMBOL_P(other)) {
return Qnil;
}
return rb_str_cmp_m(rb_sym2str(sym), rb_sym2str(other));
}
/*
* call-seq:
* casecmp(other_symbol) -> -1, 0, 1, or nil
*
* Case-insensitive version of {Symbol#<=>}[#method-i-3C-3D-3E]:
*
* :aBcDeF.casecmp(:abcde) # => 1
* :aBcDeF.casecmp(:abcdef) # => 0
* :aBcDeF.casecmp(:abcdefg) # => -1
* :abcdef.casecmp(:ABCDEF) # => 0
*
* Returns +nil+ if the two symbols have incompatible encodings,
* or if +other_symbol+ is not a symbol:
*
* sym = "\u{e4 f6 fc}".encode("ISO-8859-1").to_sym
* other_sym = :"\u{c4 d6 dc}"
* sym.casecmp(other_sym) # => nil
* :foo.casecmp(2) # => nil
*
* Currently, case-insensitivity only works on characters A-Z/a-z,
* not all of Unicode. This is different from Symbol#casecmp?.
*
* Related: Symbol#casecmp?.
*
*/
static VALUE
sym_casecmp(VALUE sym, VALUE other)
{
if (!SYMBOL_P(other)) {
return Qnil;
}
return str_casecmp(rb_sym2str(sym), rb_sym2str(other));
}
/*
* call-seq:
* casecmp?(other_symbol) -> true, false, or nil
*
* Returns +true+ if +sym+ and +other_symbol+ are equal after
* Unicode case folding, +false+ if they are not equal:
*
* :aBcDeF.casecmp?(:abcde) # => false
* :aBcDeF.casecmp?(:abcdef) # => true
* :aBcDeF.casecmp?(:abcdefg) # => false
* :abcdef.casecmp?(:ABCDEF) # => true
* :"\u{e4 f6 fc}".casecmp?(:"\u{c4 d6 dc}") #=> true
*
* Returns +nil+ if the two symbols have incompatible encodings,
* or if +other_symbol+ is not a symbol:
*
* sym = "\u{e4 f6 fc}".encode("ISO-8859-1").to_sym
* other_sym = :"\u{c4 d6 dc}"
* sym.casecmp?(other_sym) # => nil
* :foo.casecmp?(2) # => nil
*
* See {Case Mapping}[doc/case_mapping_rdoc.html].
*
* Related: Symbol#casecmp.
*
*/
static VALUE
sym_casecmp_p(VALUE sym, VALUE other)
{
if (!SYMBOL_P(other)) {
return Qnil;
}
return str_casecmp_p(rb_sym2str(sym), rb_sym2str(other));
}
/*
* call-seq:
* sym =~ obj -> integer or nil
*
* Returns <code>sym.to_s =~ obj</code>.
*/
static VALUE
sym_match(VALUE sym, VALUE other)
{
return rb_str_match(rb_sym2str(sym), other);
}
/*
* call-seq:
* sym.match(pattern) -> matchdata or nil
* sym.match(pattern, pos) -> matchdata or nil
*
* Returns <code>sym.to_s.match</code>.
*/
static VALUE
sym_match_m(int argc, VALUE *argv, VALUE sym)
{
return rb_str_match_m(argc, argv, rb_sym2str(sym));
}
/*
* call-seq:
* sym.match?(pattern) -> true or false
* sym.match?(pattern, pos) -> true or false
*
* Returns <code>sym.to_s.match?</code>.
*/
static VALUE
sym_match_m_p(int argc, VALUE *argv, VALUE sym)
{
return rb_str_match_m_p(argc, argv, sym);
}
/*
* call-seq:
* sym[idx] -> char
* sym[b, n] -> string
* sym.slice(idx) -> char
* sym.slice(b, n) -> string
*
* Returns <code>sym.to_s[]</code>.
*/
static VALUE
sym_aref(int argc, VALUE *argv, VALUE sym)
{
return rb_str_aref_m(argc, argv, rb_sym2str(sym));
}
/*
* call-seq:
* sym.length -> integer
* sym.size -> integer
*
* Same as <code>sym.to_s.length</code>.
*/
static VALUE
sym_length(VALUE sym)
{
return rb_str_length(rb_sym2str(sym));
}
/*
* call-seq:
* sym.empty? -> true or false
*
* Returns whether _sym_ is :"" or not.
*/
static VALUE
sym_empty(VALUE sym)
{
return rb_str_empty(rb_sym2str(sym));
}
/*
* call-seq:
* upcase(*options) -> symbol
*
* Equivalent to <tt>sym.to_s.upcase.to_sym</tt>.
*
* See String#upcase.
*
*/
static VALUE
sym_upcase(int argc, VALUE *argv, VALUE sym)
{
return rb_str_intern(rb_str_upcase(argc, argv, rb_sym2str(sym)));
}
/*
* call-seq:
* downcase(*options) -> symbol
*
* Equivalent to <tt>sym.to_s.downcase.to_sym</tt>.
*
* See String#downcase.
*
* Related: Symbol#upcase.
*
*/
static VALUE
sym_downcase(int argc, VALUE *argv, VALUE sym)
{
return rb_str_intern(rb_str_downcase(argc, argv, rb_sym2str(sym)));
}
/*
* call-seq:
* capitalize(*options) -> symbol
*
* Equivalent to <tt>sym.to_s.capitalize.to_sym</tt>.
*
* See String#capitalize.
*
*/
static VALUE
sym_capitalize(int argc, VALUE *argv, VALUE sym)
{
return rb_str_intern(rb_str_capitalize(argc, argv, rb_sym2str(sym)));
}
/*
* call-seq:
* swapcase(*options) -> symbol
*
* Equivalent to <tt>sym.to_s.swapcase.to_sym</tt>.
*
* See String#swapcase.
*
*/
static VALUE
sym_swapcase(int argc, VALUE *argv, VALUE sym)
{
return rb_str_intern(rb_str_swapcase(argc, argv, rb_sym2str(sym)));
}
/*
* call-seq:
* sym.start_with?([prefixes]+) -> true or false
*
* Returns true if +sym+ starts with one of the +prefixes+ given.
* Each of the +prefixes+ should be a String or a Regexp.
*
* :hello.start_with?("hell") #=> true
* :hello.start_with?(/H/i) #=> true
*
* # returns true if one of the prefixes matches.
* :hello.start_with?("heaven", "hell") #=> true
* :hello.start_with?("heaven", "paradise") #=> false
*/
static VALUE
sym_start_with(int argc, VALUE *argv, VALUE sym)
{
return rb_str_start_with(argc, argv, rb_sym2str(sym));
}
/*
* call-seq:
* sym.end_with?([suffixes]+) -> true or false
*
* Returns true if +sym+ ends with one of the +suffixes+ given.
*
* :hello.end_with?("ello") #=> true
*
* # returns true if one of the +suffixes+ matches.
* :hello.end_with?("heaven", "ello") #=> true
* :hello.end_with?("heaven", "paradise") #=> false
*/
static VALUE
sym_end_with(int argc, VALUE *argv, VALUE sym)
{
return rb_str_end_with(argc, argv, rb_sym2str(sym));
}
/*
* call-seq:
* sym.encoding -> encoding
*
* Returns the Encoding object that represents the encoding of _sym_.
*/
static VALUE
sym_encoding(VALUE sym)
{
return rb_obj_encoding(rb_sym2str(sym));
}
static VALUE
string_for_symbol(VALUE name)
{
if (!RB_TYPE_P(name, T_STRING)) {
VALUE tmp = rb_check_string_type(name);
if (NIL_P(tmp)) {
rb_raise(rb_eTypeError, "%+"PRIsVALUE" is not a symbol",
name);
}
name = tmp;
}
return name;
}
ID
rb_to_id(VALUE name)
{
if (SYMBOL_P(name)) {
return SYM2ID(name);
}
name = string_for_symbol(name);
return rb_intern_str(name);
}
VALUE
rb_to_symbol(VALUE name)
{
if (SYMBOL_P(name)) {
return name;
}
name = string_for_symbol(name);
return rb_str_intern(name);
}
/*
* call-seq:
* Symbol.all_symbols => array
*
* Returns an array of all the symbols currently in Ruby's symbol
* table.
*
* Symbol.all_symbols.size #=> 903
* Symbol.all_symbols[1,20] #=> [:floor, :ARGV, :Binding, :symlink,
* :chown, :EOFError, :$;, :String,
* :LOCK_SH, :"setuid?", :$<,
* :default_proc, :compact, :extend,
* :Tms, :getwd, :$=, :ThreadGroup,
* :wait2, :$>]
*/
static VALUE
sym_all_symbols(VALUE _)
{
return rb_sym_all_symbols();
}
VALUE
rb_str_to_interned_str(VALUE str)
{
return rb_fstring(str);
}
VALUE
rb_interned_str(const char *ptr, long len)
{
struct RString fake_str;
return register_fstring(setup_fake_str(&fake_str, ptr, len, ENCINDEX_US_ASCII), TRUE);
}
VALUE
rb_interned_str_cstr(const char *ptr)
{
return rb_interned_str(ptr, strlen(ptr));
}
VALUE
rb_enc_interned_str(const char *ptr, long len, rb_encoding *enc)
{
if (UNLIKELY(rb_enc_autoload_p(enc))) {
rb_enc_autoload(enc);
}
struct RString fake_str;
return register_fstring(rb_setup_fake_str(&fake_str, ptr, len, enc), TRUE);
}
VALUE
rb_enc_interned_str_cstr(const char *ptr, rb_encoding *enc)
{
return rb_enc_interned_str(ptr, strlen(ptr), enc);
}
/*
* A \String object has an arbitrary sequence of bytes,
* typically representing text or binary data.
* A \String object may be created using String::new or as literals.
*
* String objects differ from Symbol objects in that Symbol objects are
* designed to be used as identifiers, instead of text or data.
*
* You can create a \String object explicitly with:
*
* - A {string literal}[doc/syntax/literals_rdoc.html#label-String+Literals].
* - A {heredoc literal}[doc/syntax/literals_rdoc.html#label-Here+Document+Literals].
*
* You can convert certain objects to Strings with:
*
* - \Method {String}[Kernel.html#method-i-String].
*
* Some \String methods modify +self+.
* Typically, a method whose name ends with <tt>!</tt> modifies +self+
* and returns +self+;
* often a similarly named method (without the <tt>!</tt>)
* returns a new string.
*
* In general, if there exist both bang and non-bang version of method,
* the bang! mutates and the non-bang! does not.
* However, a method without a bang can also mutate, such as String#replace.
*
* == Substitution Methods
*
* These methods perform substitutions:
*
* - String#sub: One substitution (or none); returns a new string.
* - String#sub!: One substitution (or none); returns +self+.
* - String#gsub: Zero or more substitutions; returns a new string.
* - String#gsub!: Zero or more substitutions; returns +self+.
*
* Each of these methods takes:
*
* - A first argument, +pattern+ (string or regexp),
* that specifies the substring(s) to be replaced.
*
* - Either of these:
*
* - A second argument, +replacement+ (string or hash),
* that determines the replacing string.
* - A block that will determine the replacing string.
*
* The examples in this section mostly use methods String#sub and String#gsub;
* the principles illustrated apply to all four substitution methods.
*
* <b>Argument +pattern+</b>
*
* Argument +pattern+ is commonly a regular expression:
*
* s = 'hello'
* s.sub(/[aeiou]/, '*') # => "h*llo"
* s.gsub(/[aeiou]/, '*') # => "h*ll*"
* s.gsub(/[aeiou]/, '') # => "hll"
* s.sub(/ell/, 'al') # => "halo"
* s.gsub(/xyzzy/, '*') # => "hello"
* 'THX1138'.gsub(/\d+/, '00') # => "THX00"
*
* When +pattern+ is a string, all its characters are treated
* as ordinary characters (not as regexp special characters):
*
* 'THX1138'.gsub('\d+', '00') # => "THX1138"
*
* <b>\String +replacement+</b>
*
* If +replacement+ is a string, that string will determine
* the replacing string that is to be substituted for the matched text.
*
* Each of the examples above uses a simple string as the replacing string.
*
* \String +replacement+ may contain back-references to the pattern's captures:
*
* - <tt>\n</tt> (_n_ a non-negative integer) refers to <tt>$n</tt>.
* - <tt>\k<name></tt> refers to the named capture +name+.
*
* See rdoc-ref:regexp.rdoc for details.
*
* Note that within the string +replacement+, a character combination
* such as <tt>$&</tt> is treated as ordinary text, and not as
* a special match variable.
* However, you may refer to some special match variables using these
* combinations:
*
* - <tt>\&</tt> and <tt>\0</tt> correspond to <tt>$&</tt>,
* which contains the complete matched text.
* - <tt>\'</tt> corresponds to <tt>$'</tt>,
* which contains string after match.
* - <tt>\`</tt> corresponds to <tt>$`</tt>,
* which contains string before match.
* - <tt>\+</tt> corresponds to <tt>$+</tt>,
* which contains last capture group.
*
* See rdoc-ref:regexp.rdoc for details.
*
* Note that <tt>\\\\</tt> is interpreted as an escape, i.e., a single backslash.
*
* Note also that a string literal consumes backslashes.
* See {String Literals}[doc/syntax/literals_rdoc.html#label-String+Literals] for details about string literals.
*
* A back-reference is typically preceded by an additional backslash.
* For example, if you want to write a back-reference <tt>\&</tt> in
* +replacement+ with a double-quoted string literal, you need to write
* <tt>"..\\\\&.."</tt>.
*
* If you want to write a non-back-reference string <tt>\&</tt> in
* +replacement+, you need first to escape the backslash to prevent
* this method from interpreting it as a back-reference, and then you
* need to escape the backslashes again to prevent a string literal from
* consuming them: <tt>"..\\\\\\\\&.."</tt>.
*
* You may want to use the block form to avoid a lot of backslashes.
*
* <b>\Hash +replacement+</b>
*
* If argument +replacement+ is a hash, and +pattern+ matches one of its keys,
* the replacing string is the value for that key:
*
* h = {'foo' => 'bar', 'baz' => 'bat'}
* 'food'.sub('foo', h) # => "bard"
*
* Note that a symbol key does not match:
*
* h = {foo: 'bar', baz: 'bat'}
* 'food'.sub('foo', h) # => "d"
*
* <b>Block</b>
*
* In the block form, the current match string is passed to the block;
* the block's return value becomes the replacing string:
*
* s = '@'
* '1234'.gsub(/\d/) {|match| s.succ! } # => "ABCD"
*
* Special match variables such as <tt>$1</tt>, <tt>$2</tt>, <tt>$`</tt>,
* <tt>$&</tt>, and <tt>$'</tt> are set appropriately.
*
*
* == What's Here
*
* First, what's elsewhere. \Class \String:
*
* - Inherits from {class Object}[Object.html#class-Object-label-What-27s+Here].
* - Includes {module Comparable}[Comparable.html#module-Comparable-label-What-27s+Here].
*
* Here, class \String provides methods that are useful for:
*
* - {Creating a String}[#class-String-label-Methods+for+Creating+a+String]
* - {Frozen/Unfrozen Strings}[#class-String-label-Methods+for+a+Frozen-2FUnfrozen+String]
* - {Querying}[#class-String-label-Methods+for+Querying]
* - {Comparing}[#class-String-label-Methods+for+Comparing]
* - {Modifying a String}[#class-String-label-Methods+for+Modifying+a+String]
* - {Converting to New String}[#class-String-label-Methods+for+Converting+to+New+String]
* - {Converting to Non-String}[#class-String-label-Methods+for+Converting+to+Non--5CString]
* - {Iterating}[#class-String-label-Methods+for+Iterating]
*
* === Methods for Creating a \String
*
* - ::new:: Returns a new string.
* - ::try_convert:: Returns a new string created from a given object.
*
* === Methods for a Frozen/Unfrozen String
*
* - {#+string}[#method-i-2B-40]:: Returns a string that is not frozen:
* +self+, if not frozen; +self.dup+ otherwise.
* - {#-string}[#method-i-2D-40]:: Returns a string that is frozen:
* +self+, if already frozen; +self.freeze+ otherwise.
* - #freeze:: Freezes +self+, if not already frozen; returns +self+.
*
* === Methods for Querying
*
* _Counts_
*
* - #length, #size:: Returns the count of characters (not bytes).
* - #empty?:: Returns +true+ if +self.length+ is zero; +false+ otherwise.
* - #bytesize:: Returns the count of bytes.
* - #count:: Returns the count of substrings matching given strings.
*
* _Substrings_
*
* - {#=~}[#method-i-3D~]:: Returns the index of the first substring that matches a given Regexp or other object;
* returns +nil+ if no match is found.
* - #index:: Returns the index of the _first_ occurrence of a given substring;
* returns +nil+ if none found.
* - #rindex:: Returns the index of the _last_ occurrence of a given substring;
* returns +nil+ if none found.
* - #include?:: Returns +true+ if the string contains a given substring; +false+ otherwise.
* - #match:: Returns a MatchData object if the string matches a given Regexp; +nil+ otherwise.
* - #match?:: Returns +true+ if the string matches a given Regexp; +false+ otherwise.
* - #start_with?:: Returns +true+ if the string begins with any of the given substrings.
* - #end_with?:: Returns +true+ if the string ends with any of the given substrings.
*
* _Encodings_
*
* - #encoding:: Returns the Encoding object that represents the encoding of the string.
* - #unicode_normalized?:: Returns +true+ if the string is in Unicode normalized form; +false+ otherwise.
* - #valid_encoding?:: Returns +true+ if the string contains only characters that are valid
* for its encoding.
* - #ascii_only?:: Returns +true+ if the string has only ASCII characters; +false+ otherwise.
*
* _Other_
*
* - #sum:: Returns a basic checksum for the string: the sum of each byte.
* - #hash:: Returns the integer hash code.
*
* === Methods for Comparing
*
* - {#==, #===}[#method-i-3D-3D]:: Returns +true+ if a given other string has the same content as +self+.
* - #eql?:: Returns +true+ if the content is the same as the given other string.
* - {#<=>}[#method-i-3C-3D-3E]:: Returns -1, 0, or 1 as a given other string is smaller than, equal to, or larger than +self+.
* - #casecmp:: Ignoring case, returns -1, 0, or 1 as a given
* other string is smaller than, equal to, or larger than +self+.
* - #casecmp?:: Returns +true+ if the string is equal to a given string after Unicode case folding;
* +false+ otherwise.
*
* === Methods for Modifying a \String
*
* Each of these methods modifies +self+.
*
* _Insertion_
*
* - #insert:: Returns +self+ with a given string inserted at a given offset.
* - #<<:: Returns +self+ concatenated with a given string or integer.
*
* _Substitution_
*
* - #sub!:: Replaces the first substring that matches a given pattern with a given replacement string;
* returns +self+ if any changes, +nil+ otherwise.
* - #gsub!:: Replaces each substring that matches a given pattern with a given replacement string;
* returns +self+ if any changes, +nil+ otherwise.
* - #succ!, #next!:: Returns +self+ modified to become its own successor.
* - #replace:: Returns +self+ with its entire content replaced by a given string.
* - #reverse!:: Returns +self+ with its characters in reverse order.
* - #setbyte:: Sets the byte at a given integer offset to a given value; returns the argument.
* - #tr!:: Replaces specified characters in +self+ with specified replacement characters;
* returns +self+ if any changes, +nil+ otherwise.
* - #tr_s!:: Replaces specified characters in +self+ with specified replacement characters,
* removing duplicates from the substrings that were modified;
* returns +self+ if any changes, +nil+ otherwise.
*
* _Casing_
*
* - #capitalize!:: Upcases the initial character and downcases all others;
* returns +self+ if any changes, +nil+ otherwise.
* - #downcase!:: Downcases all characters; returns +self+ if any changes, +nil+ otherwise.
* - #upcase!:: Upcases all characters; returns +self+ if any changes, +nil+ otherwise.
* - #swapcase!:: Upcases each downcase character and downcases each upcase character;
* returns +self+ if any changes, +nil+ otherwise.
*
* _Encoding_
*
* - #encode!:: Returns +self+ with all characters transcoded from one given encoding into another.
* - #unicode_normalize!:: Unicode-normalizes +self+; returns +self+.
* - #scrub!:: Replaces each invalid byte with a given character; returns +self+.
* - #force_encoding:: Changes the encoding to a given encoding; returns +self+.
*
* _Deletion_
*
* - #clear:: Removes all content, so that +self+ is empty; returns +self+.
* - #slice!, #[]=:: Removes a substring determined by a given index, start/length, range, regexp, or substring.
* - #squeeze!:: Removes contiguous duplicate characters; returns +self+.
* - #delete!:: Removes characters as determined by the intersection of substring arguments.
* - #lstrip!:: Removes leading whitespace; returns +self+ if any changes, +nil+ otherwise.
* - #rstrip!:: Removes trailing whitespace; returns +self+ if any changes, +nil+ otherwise.
* - #strip!:: Removes leading and trailing whitespace; returns +self+ if any changes, +nil+ otherwise.
* - #chomp!:: Removes trailing record separator, if found; returns +self+ if any changes, +nil+ otherwise.
* - #chop!:: Removes trailing whitespace if found, otherwise removes the last character;
* returns +self+ if any changes, +nil+ otherwise.
*
* === Methods for Converting to New \String
*
* Each of these methods returns a new \String based on +self+,
* often just a modified copy of +self+.
*
* _Extension_
*
* - #*:: Returns the concatenation of multiple copies of +self+,
* - #+:: Returns the concatenation of +self+ and a given other string.
* - #center:: Returns a copy of +self+ centered between pad substring.
* - #concat:: Returns the concatenation of +self+ with given other strings.
* - #prepend:: Returns the concatenation of a given other string with +self+.
* - #ljust:: Returns a copy of +self+ of a given length, right-padded with a given other string.
* - #rjust:: Returns a copy of +self+ of a given length, left-padded with a given other string.
*
* _Encoding_
*
* - #b:: Returns a copy of +self+ with ASCII-8BIT encoding.
* - #scrub:: Returns a copy of +self+ with each invalid byte replaced with a given character.
* - #unicode_normalize:: Returns a copy of +self+ with each character Unicode-normalized.
* - #encode:: Returns a copy of +self+ with all characters transcoded from one given encoding into another.
*
* _Substitution_
*
* - #dump:: Returns a copy of +self with all non-printing characters replaced by \xHH notation
* and all special characters escaped.
* - #undump:: Returns a copy of +self with all <tt>\xNN</tt> notation replace by <tt>\uNNNN</tt> notation
* and all escaped characters unescaped.
* - #sub:: Returns a copy of +self+ with the first substring matching a given pattern
* replaced with a given replacement string;.
* - #gsub:: Returns a copy of +self+ with each substring that matches a given pattern
* replaced with a given replacement string.
* - #succ, #next:: Returns the string that is the successor to +self+.
* - #reverse:: Returns a copy of +self+ with its characters in reverse order.
* - #tr:: Returns a copy of +self+ with specified characters replaced with specified replacement characters.
* - #tr_s:: Returns a copy of +self+ with specified characters replaced with specified replacement characters,
* removing duplicates from the substrings that were modified.
* - #%:: Returns the string resulting from formatting a given object into +self+
*
* _Casing_
*
* - #capitalize:: Returns a copy of +self+ with the first character upcased
* and all other characters downcased.
* - #downcase:: Returns a copy of +self+ with all characters downcased.
* - #upcase:: Returns a copy of +self+ with all characters upcased.
* - #swapcase:: Returns a copy of +self+ with all upcase characters downcased
* and all downcase characters upcased.
*
* _Deletion_
*
* - #delete:: Returns a copy of +self+ with characters removed
* - #delete_prefix:: Returns a copy of +self+ with a given prefix removed.
* - #delete_suffix:: Returns a copy of +self+ with a given suffix removed.
* - #lstrip:: Returns a copy of +self+ with leading whitespace removed.
* - #rstrip:: Returns a copy of +self+ with trailing whitespace removed.
* - #strip:: Returns a copy of +self+ with leading and trailing whitespace removed.
* - #chomp:: Returns a copy of +self+ with a trailing record separator removed, if found.
* - #chop:: Returns a copy of +self+ with trailing whitespace or the last character removed.
* - #squeeze:: Returns a copy of +self+ with contiguous duplicate characters removed.
* - #[], #slice:: Returns a substring determined by a given index, start/length, or range, or string.
* - #byteslice:: Returns a substring determined by a given index, start/length, or range.
* - #chr:: Returns the first character.
*
* _Duplication_
*
* - #to_s, $to_str:: If +self+ is a subclass of \String, returns +self+ copied into a \String;
* otherwise, returns +self+.
*
* === Methods for Converting to Non-\String
*
* Each of these methods converts the contents of +self+ to a non-\String.
*
* <em>Characters, Bytes, and Clusters</em>
*
* - #bytes:: Returns an array of the bytes in +self+.
* - #chars:: Returns an array of the characters in +self+.
* - #codepoints:: Returns an array of the integer ordinals in +self+.
* - #getbyte:: Returns an integer byte as determined by a given index.
* - #grapheme_clusters:: Returns an array of the grapheme clusters in +self+.
*
* _Splitting_
*
* - #lines:: Returns an array of the lines in +self+, as determined by a given record separator.
* - #partition:: Returns a 3-element array determined by the first substring that matches
* a given substring or regexp,
* - #rpartition:: Returns a 3-element array determined by the last substring that matches
* a given substring or regexp,
* - #split:: Returns an array of substrings determined by a given delimiter -- regexp or string --
* or, if a block given, passes those substrings to the block.
*
* _Matching_
*
* - #scan:: Returns an array of substrings matching a given regexp or string, or,
* if a block given, passes each matching substring to the block.
* - #unpack:: Returns an array of substrings extracted from +self+ according to a given format.
* - #unpack1:: Returns the first substring extracted from +self+ according to a given format.
*
* _Numerics_
*
* - #hex:: Returns the integer value of the leading characters, interpreted as hexadecimal digits.
* - #oct:: Returns the integer value of the leading characters, interpreted as octal digits.
* - #ord:: Returns the integer ordinal of the first character in +self+.
* - #to_i:: Returns the integer value of leading characters, interpreted as an integer.
* - #to_f:: Returns the floating-point value of leading characters, interpreted as a floating-point number.
*
* <em>Strings and Symbols</em>
*
* - #inspect:: Returns copy of +self+, enclosed in double-quotes, with special characters escaped.
* - #to_sym, #intern:: Returns the symbol corresponding to +self+.
*
* === Methods for Iterating
*
* - #each_byte:: Calls the given block with each successive byte in +self+.
* - #each_char:: Calls the given block with each successive character in +self+.
* - #each_codepoint:: Calls the given block with each successive integer codepoint in +self+.
* - #each_grapheme_cluster:: Calls the given block with each successive grapheme cluster in +self+.
* - #each_line:: Calls the given block with each successive line in +self+,
* as determined by a given record separator.
* - #upto:: Calls the given block with each string value returned by successive calls to #succ.
*/
void
Init_String(void)
{
rb_cString = rb_define_class("String", rb_cObject);
assert(rb_vm_fstring_table());
st_foreach(rb_vm_fstring_table(), fstring_set_class_i, rb_cString);
rb_include_module(rb_cString, rb_mComparable);
rb_define_alloc_func(rb_cString, empty_str_alloc);
rb_define_singleton_method(rb_cString, "try_convert", rb_str_s_try_convert, 1);
rb_define_method(rb_cString, "initialize", rb_str_init, -1);
rb_define_method(rb_cString, "initialize_copy", rb_str_replace, 1);
rb_define_method(rb_cString, "<=>", rb_str_cmp_m, 1);
rb_define_method(rb_cString, "==", rb_str_equal, 1);
rb_define_method(rb_cString, "===", rb_str_equal, 1);
rb_define_method(rb_cString, "eql?", rb_str_eql, 1);
rb_define_method(rb_cString, "hash", rb_str_hash_m, 0);
rb_define_method(rb_cString, "casecmp", rb_str_casecmp, 1);
rb_define_method(rb_cString, "casecmp?", rb_str_casecmp_p, 1);
rb_define_method(rb_cString, "+", rb_str_plus, 1);
rb_define_method(rb_cString, "*", rb_str_times, 1);
rb_define_method(rb_cString, "%", rb_str_format_m, 1);
rb_define_method(rb_cString, "[]", rb_str_aref_m, -1);
rb_define_method(rb_cString, "[]=", rb_str_aset_m, -1);
rb_define_method(rb_cString, "insert", rb_str_insert, 2);
rb_define_method(rb_cString, "length", rb_str_length, 0);
rb_define_method(rb_cString, "size", rb_str_length, 0);
rb_define_method(rb_cString, "bytesize", rb_str_bytesize, 0);
rb_define_method(rb_cString, "empty?", rb_str_empty, 0);
rb_define_method(rb_cString, "=~", rb_str_match, 1);
rb_define_method(rb_cString, "match", rb_str_match_m, -1);
rb_define_method(rb_cString, "match?", rb_str_match_m_p, -1);
rb_define_method(rb_cString, "succ", rb_str_succ, 0);
rb_define_method(rb_cString, "succ!", rb_str_succ_bang, 0);
rb_define_method(rb_cString, "next", rb_str_succ, 0);
rb_define_method(rb_cString, "next!", rb_str_succ_bang, 0);
rb_define_method(rb_cString, "upto", rb_str_upto, -1);
rb_define_method(rb_cString, "index", rb_str_index_m, -1);
rb_define_method(rb_cString, "rindex", rb_str_rindex_m, -1);
rb_define_method(rb_cString, "replace", rb_str_replace, 1);
rb_define_method(rb_cString, "clear", rb_str_clear, 0);
rb_define_method(rb_cString, "chr", rb_str_chr, 0);
rb_define_method(rb_cString, "getbyte", rb_str_getbyte, 1);
rb_define_method(rb_cString, "setbyte", rb_str_setbyte, 2);
rb_define_method(rb_cString, "byteslice", rb_str_byteslice, -1);
rb_define_method(rb_cString, "scrub", str_scrub, -1);
rb_define_method(rb_cString, "scrub!", str_scrub_bang, -1);
rb_define_method(rb_cString, "freeze", rb_str_freeze, 0);
rb_define_method(rb_cString, "+@", str_uplus, 0);
rb_define_method(rb_cString, "-@", str_uminus, 0);
rb_define_method(rb_cString, "to_i", rb_str_to_i, -1);
rb_define_method(rb_cString, "to_f", rb_str_to_f, 0);
rb_define_method(rb_cString, "to_s", rb_str_to_s, 0);
rb_define_method(rb_cString, "to_str", rb_str_to_s, 0);
rb_define_method(rb_cString, "inspect", rb_str_inspect, 0);
rb_define_method(rb_cString, "dump", rb_str_dump, 0);
rb_define_method(rb_cString, "undump", str_undump, 0);
sym_ascii = ID2SYM(rb_intern_const("ascii"));
sym_turkic = ID2SYM(rb_intern_const("turkic"));
sym_lithuanian = ID2SYM(rb_intern_const("lithuanian"));
sym_fold = ID2SYM(rb_intern_const("fold"));
rb_define_method(rb_cString, "upcase", rb_str_upcase, -1);
rb_define_method(rb_cString, "downcase", rb_str_downcase, -1);
rb_define_method(rb_cString, "capitalize", rb_str_capitalize, -1);
rb_define_method(rb_cString, "swapcase", rb_str_swapcase, -1);
rb_define_method(rb_cString, "upcase!", rb_str_upcase_bang, -1);
rb_define_method(rb_cString, "downcase!", rb_str_downcase_bang, -1);
rb_define_method(rb_cString, "capitalize!", rb_str_capitalize_bang, -1);
rb_define_method(rb_cString, "swapcase!", rb_str_swapcase_bang, -1);
rb_define_method(rb_cString, "hex", rb_str_hex, 0);
rb_define_method(rb_cString, "oct", rb_str_oct, 0);
rb_define_method(rb_cString, "split", rb_str_split_m, -1);
rb_define_method(rb_cString, "lines", rb_str_lines, -1);
rb_define_method(rb_cString, "bytes", rb_str_bytes, 0);
rb_define_method(rb_cString, "chars", rb_str_chars, 0);
rb_define_method(rb_cString, "codepoints", rb_str_codepoints, 0);
rb_define_method(rb_cString, "grapheme_clusters", rb_str_grapheme_clusters, 0);
rb_define_method(rb_cString, "reverse", rb_str_reverse, 0);
rb_define_method(rb_cString, "reverse!", rb_str_reverse_bang, 0);
rb_define_method(rb_cString, "concat", rb_str_concat_multi, -1);
rb_define_method(rb_cString, "<<", rb_str_concat, 1);
rb_define_method(rb_cString, "prepend", rb_str_prepend_multi, -1);
rb_define_method(rb_cString, "crypt", rb_str_crypt, 1);
rb_define_method(rb_cString, "intern", rb_str_intern, 0); /* in symbol.c */
rb_define_method(rb_cString, "to_sym", rb_str_intern, 0); /* in symbol.c */
rb_define_method(rb_cString, "ord", rb_str_ord, 0);
rb_define_method(rb_cString, "include?", rb_str_include, 1);
rb_define_method(rb_cString, "start_with?", rb_str_start_with, -1);
rb_define_method(rb_cString, "end_with?", rb_str_end_with, -1);
rb_define_method(rb_cString, "scan", rb_str_scan, 1);
rb_define_method(rb_cString, "ljust", rb_str_ljust, -1);
rb_define_method(rb_cString, "rjust", rb_str_rjust, -1);
rb_define_method(rb_cString, "center", rb_str_center, -1);
rb_define_method(rb_cString, "sub", rb_str_sub, -1);
rb_define_method(rb_cString, "gsub", rb_str_gsub, -1);
rb_define_method(rb_cString, "chop", rb_str_chop, 0);
rb_define_method(rb_cString, "chomp", rb_str_chomp, -1);
rb_define_method(rb_cString, "strip", rb_str_strip, 0);
rb_define_method(rb_cString, "lstrip", rb_str_lstrip, 0);
rb_define_method(rb_cString, "rstrip", rb_str_rstrip, 0);
rb_define_method(rb_cString, "delete_prefix", rb_str_delete_prefix, 1);
rb_define_method(rb_cString, "delete_suffix", rb_str_delete_suffix, 1);
rb_define_method(rb_cString, "sub!", rb_str_sub_bang, -1);
rb_define_method(rb_cString, "gsub!", rb_str_gsub_bang, -1);
rb_define_method(rb_cString, "chop!", rb_str_chop_bang, 0);
rb_define_method(rb_cString, "chomp!", rb_str_chomp_bang, -1);
rb_define_method(rb_cString, "strip!", rb_str_strip_bang, 0);
rb_define_method(rb_cString, "lstrip!", rb_str_lstrip_bang, 0);
rb_define_method(rb_cString, "rstrip!", rb_str_rstrip_bang, 0);
rb_define_method(rb_cString, "delete_prefix!", rb_str_delete_prefix_bang, 1);
rb_define_method(rb_cString, "delete_suffix!", rb_str_delete_suffix_bang, 1);
rb_define_method(rb_cString, "tr", rb_str_tr, 2);
rb_define_method(rb_cString, "tr_s", rb_str_tr_s, 2);
rb_define_method(rb_cString, "delete", rb_str_delete, -1);
rb_define_method(rb_cString, "squeeze", rb_str_squeeze, -1);
rb_define_method(rb_cString, "count", rb_str_count, -1);
rb_define_method(rb_cString, "tr!", rb_str_tr_bang, 2);
rb_define_method(rb_cString, "tr_s!", rb_str_tr_s_bang, 2);
rb_define_method(rb_cString, "delete!", rb_str_delete_bang, -1);
rb_define_method(rb_cString, "squeeze!", rb_str_squeeze_bang, -1);
rb_define_method(rb_cString, "each_line", rb_str_each_line, -1);
rb_define_method(rb_cString, "each_byte", rb_str_each_byte, 0);
rb_define_method(rb_cString, "each_char", rb_str_each_char, 0);
rb_define_method(rb_cString, "each_codepoint", rb_str_each_codepoint, 0);
rb_define_method(rb_cString, "each_grapheme_cluster", rb_str_each_grapheme_cluster, 0);
rb_define_method(rb_cString, "sum", rb_str_sum, -1);
rb_define_method(rb_cString, "slice", rb_str_aref_m, -1);
rb_define_method(rb_cString, "slice!", rb_str_slice_bang, -1);
rb_define_method(rb_cString, "partition", rb_str_partition, 1);
rb_define_method(rb_cString, "rpartition", rb_str_rpartition, 1);
rb_define_method(rb_cString, "encoding", rb_obj_encoding, 0); /* in encoding.c */
rb_define_method(rb_cString, "force_encoding", rb_str_force_encoding, 1);
rb_define_method(rb_cString, "b", rb_str_b, 0);
rb_define_method(rb_cString, "valid_encoding?", rb_str_valid_encoding_p, 0);
rb_define_method(rb_cString, "ascii_only?", rb_str_is_ascii_only_p, 0);
/* define UnicodeNormalize module here so that we don't have to look it up */
mUnicodeNormalize = rb_define_module("UnicodeNormalize");
id_normalize = rb_intern_const("normalize");
id_normalized_p = rb_intern_const("normalized?");
rb_define_method(rb_cString, "unicode_normalize", rb_str_unicode_normalize, -1);
rb_define_method(rb_cString, "unicode_normalize!", rb_str_unicode_normalize_bang, -1);
rb_define_method(rb_cString, "unicode_normalized?", rb_str_unicode_normalized_p, -1);
rb_fs = Qnil;
rb_define_hooked_variable("$;", &rb_fs, 0, rb_fs_setter);
rb_define_hooked_variable("$-F", &rb_fs, 0, rb_fs_setter);
rb_gc_register_address(&rb_fs);
rb_cSymbol = rb_define_class("Symbol", rb_cObject);
rb_include_module(rb_cSymbol, rb_mComparable);
rb_undef_alloc_func(rb_cSymbol);
rb_undef_method(CLASS_OF(rb_cSymbol), "new");
rb_define_singleton_method(rb_cSymbol, "all_symbols", sym_all_symbols, 0);
rb_define_method(rb_cSymbol, "==", sym_equal, 1);
rb_define_method(rb_cSymbol, "===", sym_equal, 1);
rb_define_method(rb_cSymbol, "inspect", sym_inspect, 0);
rb_define_method(rb_cSymbol, "to_s", rb_sym_to_s, 0);
rb_define_method(rb_cSymbol, "id2name", rb_sym_to_s, 0);
rb_define_method(rb_cSymbol, "name", rb_sym2str, 0);
rb_define_method(rb_cSymbol, "intern", sym_to_sym, 0);
rb_define_method(rb_cSymbol, "to_sym", sym_to_sym, 0);
rb_define_method(rb_cSymbol, "to_proc", rb_sym_to_proc, 0);
rb_define_method(rb_cSymbol, "succ", sym_succ, 0);
rb_define_method(rb_cSymbol, "next", sym_succ, 0);
rb_define_method(rb_cSymbol, "<=>", sym_cmp, 1);
rb_define_method(rb_cSymbol, "casecmp", sym_casecmp, 1);
rb_define_method(rb_cSymbol, "casecmp?", sym_casecmp_p, 1);
rb_define_method(rb_cSymbol, "=~", sym_match, 1);
rb_define_method(rb_cSymbol, "[]", sym_aref, -1);
rb_define_method(rb_cSymbol, "slice", sym_aref, -1);
rb_define_method(rb_cSymbol, "length", sym_length, 0);
rb_define_method(rb_cSymbol, "size", sym_length, 0);
rb_define_method(rb_cSymbol, "empty?", sym_empty, 0);
rb_define_method(rb_cSymbol, "match", sym_match_m, -1);
rb_define_method(rb_cSymbol, "match?", sym_match_m_p, -1);
rb_define_method(rb_cSymbol, "upcase", sym_upcase, -1);
rb_define_method(rb_cSymbol, "downcase", sym_downcase, -1);
rb_define_method(rb_cSymbol, "capitalize", sym_capitalize, -1);
rb_define_method(rb_cSymbol, "swapcase", sym_swapcase, -1);
rb_define_method(rb_cSymbol, "start_with?", sym_start_with, -1);
rb_define_method(rb_cSymbol, "end_with?", sym_end_with, -1);
rb_define_method(rb_cSymbol, "encoding", sym_encoding, 0);
}
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