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37855698ff
[ruby-dev:32693] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14568 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
5849 lines
141 KiB
C
5849 lines
141 KiB
C
/**********************************************************************
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string.c -
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$Author$
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$Date$
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created at: Mon Aug 9 17:12:58 JST 1993
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Copyright (C) 1993-2007 Yukihiro Matsumoto
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Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
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Copyright (C) 2000 Information-technology Promotion Agency, Japan
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**********************************************************************/
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#include "ruby/ruby.h"
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#include "ruby/re.h"
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#include "ruby/encoding.h"
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#define BEG(no) regs->beg[no]
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#define END(no) regs->end[no]
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#include <math.h>
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#include <ctype.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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VALUE rb_cString;
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VALUE rb_cSymbol;
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#define STR_TMPLOCK FL_USER7
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#define STR_NOEMBED FL_USER1
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#define STR_SHARED FL_USER2 /* = ELTS_SHARED */
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#define STR_ASSOC FL_USER3
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#define STR_SHARED_P(s) FL_ALL(s, STR_NOEMBED|ELTS_SHARED)
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#define STR_ASSOC_P(s) FL_ALL(s, STR_NOEMBED|STR_ASSOC)
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#define STR_NOCAPA (STR_NOEMBED|ELTS_SHARED|STR_ASSOC)
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#define STR_NOCAPA_P(s) (FL_TEST(s,STR_NOEMBED) && FL_ANY(s,ELTS_SHARED|STR_ASSOC))
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#define STR_UNSET_NOCAPA(s) do {\
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if (FL_TEST(s,STR_NOEMBED)) FL_UNSET(s,(ELTS_SHARED|STR_ASSOC));\
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} while (0)
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#define STR_SET_NOEMBED(str) do {\
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FL_SET(str, STR_NOEMBED);\
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STR_SET_EMBED_LEN(str, 0);\
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} while (0)
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#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)
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#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))
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#define STR_SET_EMBED_LEN(str, n) do { \
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long tmp_n = (n);\
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RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
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RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
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} while (0)
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#define STR_SET_LEN(str, n) do { \
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if (STR_EMBED_P(str)) {\
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STR_SET_EMBED_LEN(str, n);\
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}\
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else {\
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RSTRING(str)->as.heap.len = (n);\
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}\
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} while (0)
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#define STR_DEC_LEN(str) do {\
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if (STR_EMBED_P(str)) {\
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long n = RSTRING_LEN(str);\
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n--;\
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STR_SET_EMBED_LEN(str, n);\
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}\
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else {\
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RSTRING(str)->as.heap.len--;\
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}\
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} while (0)
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#define RESIZE_CAPA(str,capacity) do {\
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if (STR_EMBED_P(str)) {\
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if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
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char *tmp = ALLOC_N(char, capacity+1);\
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memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
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RSTRING(str)->as.heap.ptr = tmp;\
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RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
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STR_SET_NOEMBED(str);\
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RSTRING(str)->as.heap.aux.capa = (capacity);\
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}\
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}\
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else {\
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REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
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if (!STR_NOCAPA_P(str))\
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RSTRING(str)->as.heap.aux.capa = (capacity);\
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}\
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} while (0)
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#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)
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#define IS_7BIT(str) (ENC_CODERANGE(str) == ENC_CODERANGE_7BIT)
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#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)
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VALUE rb_fs;
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int
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rb_enc_str_coderange(VALUE str)
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{
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int cr = ENC_CODERANGE(str);
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if (cr == ENC_CODERANGE_UNKNOWN) {
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rb_encoding *enc = rb_enc_get(str);
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const char *p = RSTRING_PTR(str);
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const char *e = p + RSTRING_LEN(str);
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cr = rb_enc_asciicompat(enc) ? ENC_CODERANGE_7BIT : ENC_CODERANGE_VALID;
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while (p < e) {
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int ret = rb_enc_precise_mbclen(p, e, enc);
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int len = MBCLEN_CHARFOUND(ret);
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if (len) {
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if (len != 1 || !rb_enc_isascii((unsigned char)*p, enc)) {
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cr = ENC_CODERANGE_VALID;
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}
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p += len;
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}
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else {
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cr = ENC_CODERANGE_BROKEN;
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break;
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}
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}
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ENC_CODERANGE_SET(str, cr);
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}
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return cr;
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}
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int rb_enc_str_asciionly_p(VALUE str)
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{
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rb_encoding *enc = rb_enc_get(str);
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if (!rb_enc_asciicompat(enc))
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return Qfalse;
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else if (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)
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return Qtrue;
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return Qfalse;
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}
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static inline void
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str_mod_check(VALUE s, char *p, long len)
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{
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if (RSTRING_PTR(s) != p || RSTRING_LEN(s) != len){
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rb_raise(rb_eRuntimeError, "string modified");
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}
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}
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static inline void
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str_frozen_check(VALUE s)
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{
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if (OBJ_FROZEN(s)) {
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rb_raise(rb_eRuntimeError, "string frozen");
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}
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}
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static VALUE
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str_alloc(VALUE klass)
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{
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NEWOBJ(str, struct RString);
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OBJSETUP(str, klass, T_STRING);
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if (klass == rb_cSymbol) {
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/* need to be registered in table */
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RBASIC(str)->klass = rb_cString;
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}
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str->as.heap.ptr = 0;
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str->as.heap.len = 0;
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str->as.heap.aux.capa = 0;
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return (VALUE)str;
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}
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static VALUE
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str_new(VALUE klass, const char *ptr, long len)
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{
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VALUE str;
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if (len < 0) {
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rb_raise(rb_eArgError, "negative string size (or size too big)");
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}
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str = str_alloc(klass);
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if (len > RSTRING_EMBED_LEN_MAX) {
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RSTRING(str)->as.heap.aux.capa = len;
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RSTRING(str)->as.heap.ptr = ALLOC_N(char,len+1);
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STR_SET_NOEMBED(str);
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}
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if (ptr) {
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memcpy(RSTRING_PTR(str), ptr, len);
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}
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STR_SET_LEN(str, len);
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RSTRING_PTR(str)[len] = '\0';
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return str;
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}
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VALUE
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rb_str_new(const char *ptr, long len)
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{
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return str_new(rb_cString, ptr, len);
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}
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VALUE
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rb_enc_str_new(const char *ptr, long len, rb_encoding *enc)
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{
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VALUE str = str_new(rb_cString, ptr, len);
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rb_enc_associate(str, enc);
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return str;
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}
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VALUE
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rb_str_new2(const char *ptr)
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{
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if (!ptr) {
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rb_raise(rb_eArgError, "NULL pointer given");
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}
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return rb_str_new(ptr, strlen(ptr));
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}
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VALUE
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rb_tainted_str_new(const char *ptr, long len)
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{
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VALUE str = rb_str_new(ptr, len);
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OBJ_TAINT(str);
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return str;
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}
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VALUE
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rb_tainted_str_new2(const char *ptr)
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{
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VALUE str = rb_str_new2(ptr);
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OBJ_TAINT(str);
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return str;
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}
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static VALUE
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str_new_shared(VALUE klass, VALUE str)
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{
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VALUE str2 = str_alloc(klass);
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if (RSTRING_LEN(str) <= RSTRING_EMBED_LEN_MAX) {
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STR_SET_EMBED(str2);
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memcpy(RSTRING_PTR(str2), RSTRING_PTR(str), RSTRING_LEN(str)+1);
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STR_SET_EMBED_LEN(str2, RSTRING_LEN(str));
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}
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else {
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FL_SET(str2, STR_NOEMBED);
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RSTRING(str2)->as.heap.len = RSTRING_LEN(str);
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RSTRING(str2)->as.heap.ptr = RSTRING_PTR(str);
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RSTRING(str2)->as.heap.aux.shared = str;
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FL_SET(str2, ELTS_SHARED);
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}
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return str2;
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}
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static VALUE
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str_new3(VALUE klass, VALUE str)
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{
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VALUE str2 = str_new_shared(klass, str);
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rb_enc_copy(str2, str);
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return str2;
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}
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VALUE
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rb_str_new3(VALUE str)
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{
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VALUE str2 = str_new3(rb_obj_class(str), str);
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OBJ_INFECT(str2, str);
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return str2;
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}
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static VALUE
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str_new4(VALUE klass, VALUE str)
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{
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VALUE str2;
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str2 = str_alloc(klass);
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STR_SET_NOEMBED(str2);
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RSTRING(str2)->as.heap.len = RSTRING_LEN(str);
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RSTRING(str2)->as.heap.ptr = RSTRING_PTR(str);
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if (STR_SHARED_P(str)) {
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FL_SET(str2, ELTS_SHARED);
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RSTRING(str2)->as.heap.aux.shared = RSTRING(str)->as.heap.aux.shared;
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}
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else {
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FL_SET(str, ELTS_SHARED);
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RSTRING(str)->as.heap.aux.shared = str2;
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}
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rb_enc_copy(str2, str);
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OBJ_INFECT(str2, str);
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return str2;
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}
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VALUE
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rb_str_new4(VALUE orig)
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{
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VALUE klass, str;
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if (OBJ_FROZEN(orig)) return orig;
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klass = rb_obj_class(orig);
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if (STR_SHARED_P(orig) && (str = RSTRING(orig)->as.heap.aux.shared)
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&& klass == RBASIC(str)->klass) {
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long ofs;
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ofs = RSTRING_LEN(str) - RSTRING_LEN(orig);
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if ((ofs > 0) || (!OBJ_TAINTED(str) && OBJ_TAINTED(orig))) {
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str = str_new3(klass, str);
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RSTRING(str)->as.heap.ptr += ofs;
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RSTRING(str)->as.heap.len -= ofs;
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}
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}
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else if (STR_ASSOC_P(orig) || STR_EMBED_P(orig)) {
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str = str_new(klass, RSTRING_PTR(orig), RSTRING_LEN(orig));
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rb_enc_copy(str, orig);
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}
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else {
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str = str_new4(klass, orig);
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}
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OBJ_INFECT(str, orig);
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OBJ_FREEZE(str);
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return str;
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}
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VALUE
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rb_str_new5(VALUE obj, const char *ptr, long len)
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{
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return str_new(rb_obj_class(obj), ptr, len);
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}
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#define STR_BUF_MIN_SIZE 128
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VALUE
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rb_str_buf_new(long capa)
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{
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VALUE str = str_alloc(rb_cString);
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if (capa < STR_BUF_MIN_SIZE) {
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capa = STR_BUF_MIN_SIZE;
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}
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FL_SET(str, STR_NOEMBED);
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RSTRING(str)->as.heap.aux.capa = capa;
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RSTRING(str)->as.heap.ptr = ALLOC_N(char, capa+1);
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RSTRING(str)->as.heap.ptr[0] = '\0';
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return str;
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}
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VALUE
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rb_str_buf_new2(const char *ptr)
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{
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VALUE str;
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long len = strlen(ptr);
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str = rb_str_buf_new(len);
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rb_str_buf_cat(str, ptr, len);
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return str;
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}
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VALUE
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rb_str_tmp_new(long len)
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{
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return str_new(0, 0, len);
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}
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void
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rb_str_free(VALUE str)
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{
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if (!STR_EMBED_P(str) && !STR_SHARED_P(str)) {
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xfree(RSTRING(str)->as.heap.ptr);
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}
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}
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VALUE
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rb_str_to_str(VALUE str)
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{
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return rb_convert_type(str, T_STRING, "String", "to_str");
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}
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void
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rb_str_shared_replace(VALUE str, VALUE str2)
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{
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if (str == str2) return;
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rb_str_modify(str);
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if (OBJ_TAINTED(str2)) OBJ_TAINT(str);
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if (RSTRING_LEN(str2) <= RSTRING_EMBED_LEN_MAX) {
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STR_SET_EMBED(str);
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memcpy(RSTRING_PTR(str), RSTRING_PTR(str2), RSTRING_LEN(str2)+1);
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STR_SET_EMBED_LEN(str, RSTRING_LEN(str2));
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return;
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}
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if (!STR_SHARED_P(str) && !STR_EMBED_P(str)) {
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free(RSTRING_PTR(str));
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}
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STR_SET_NOEMBED(str);
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STR_UNSET_NOCAPA(str);
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RSTRING(str)->as.heap.ptr = RSTRING_PTR(str2);
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RSTRING(str)->as.heap.len = RSTRING_LEN(str2);
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if (STR_NOCAPA_P(str2)) {
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FL_SET(str, RBASIC(str2)->flags & STR_NOCAPA);
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RSTRING(str)->as.heap.aux.shared = RSTRING(str2)->as.heap.aux.shared;
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}
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else {
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RSTRING(str)->as.heap.aux.capa = RSTRING(str2)->as.heap.aux.capa;
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}
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RSTRING(str2)->as.heap.ptr = 0; /* abandon str2 */
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RSTRING(str2)->as.heap.len = 0;
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RSTRING(str2)->as.heap.aux.capa = 0;
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STR_UNSET_NOCAPA(str2);
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}
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static ID id_to_s;
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VALUE
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rb_obj_as_string(VALUE obj)
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{
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VALUE str;
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if (TYPE(obj) == T_STRING) {
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return obj;
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}
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str = rb_funcall(obj, id_to_s, 0);
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if (TYPE(str) != T_STRING)
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return rb_any_to_s(obj);
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if (OBJ_TAINTED(obj)) OBJ_TAINT(str);
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return str;
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}
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static VALUE rb_str_replace(VALUE, VALUE);
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VALUE
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rb_str_dup(VALUE str)
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{
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VALUE dup = str_alloc(rb_obj_class(str));
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rb_str_replace(dup, str);
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return dup;
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}
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/*
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* call-seq:
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* String.new(str="") => new_str
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*
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* Returns a new string object containing a copy of <i>str</i>.
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*/
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static VALUE
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rb_str_init(int argc, VALUE *argv, VALUE str)
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{
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VALUE orig;
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if (rb_scan_args(argc, argv, "01", &orig) == 1)
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rb_str_replace(str, orig);
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return str;
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}
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static long
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str_strlen(VALUE str, rb_encoding *enc)
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{
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long len;
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if (is_ascii_string(str)) return RSTRING_LEN(str);
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if (!enc) enc = rb_enc_get(str);
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len = rb_enc_strlen(RSTRING_PTR(str), RSTRING_END(str), enc);
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if (len < 0) {
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rb_raise(rb_eArgError, "invalid mbstring sequence");
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}
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return len;
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}
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|
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/*
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|
* call-seq:
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|
* str.length => integer
|
|
* str.size => integer
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*
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* Returns the character length of <i>str</i>.
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*/
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VALUE
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rb_str_length(VALUE str)
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{
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int len;
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len = str_strlen(str, rb_enc_get(str));
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return INT2NUM(len);
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}
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/*
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* call-seq:
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* str.bytesize => integer
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*
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|
* Returns the length of <i>str</i> in bytes.
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|
*/
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static VALUE
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rb_str_bytesize(VALUE str)
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{
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return INT2NUM(RSTRING_LEN(str));
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}
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|
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/*
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|
* call-seq:
|
|
* str.empty? => true or false
|
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*
|
|
* Returns <code>true</code> if <i>str</i> has a length of zero.
|
|
*
|
|
* "hello".empty? #=> false
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|
* "".empty? #=> true
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|
*/
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static VALUE
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rb_str_empty(VALUE str)
|
|
{
|
|
if (RSTRING_LEN(str) == 0)
|
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return Qtrue;
|
|
return Qfalse;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str + other_str => new_str
|
|
*
|
|
* Concatenation---Returns a new <code>String</code> containing
|
|
* <i>other_str</i> concatenated to <i>str</i>.
|
|
*
|
|
* "Hello from " + self.to_s #=> "Hello from main"
|
|
*/
|
|
|
|
VALUE
|
|
rb_str_plus(VALUE str1, VALUE str2)
|
|
{
|
|
VALUE str3;
|
|
rb_encoding *enc;
|
|
|
|
StringValue(str2);
|
|
enc = rb_enc_check(str1, str2);
|
|
str3 = rb_str_new(0, RSTRING_LEN(str1)+RSTRING_LEN(str2));
|
|
memcpy(RSTRING_PTR(str3), RSTRING_PTR(str1), RSTRING_LEN(str1));
|
|
memcpy(RSTRING_PTR(str3) + RSTRING_LEN(str1),
|
|
RSTRING_PTR(str2), RSTRING_LEN(str2));
|
|
RSTRING_PTR(str3)[RSTRING_LEN(str3)] = '\0';
|
|
|
|
if (OBJ_TAINTED(str1) || OBJ_TAINTED(str2))
|
|
OBJ_TAINT(str3);
|
|
rb_enc_associate(str3, enc);
|
|
return str3;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str * integer => new_str
|
|
*
|
|
* Copy---Returns a new <code>String</code> containing <i>integer</i> copies of
|
|
* the receiver.
|
|
*
|
|
* "Ho! " * 3 #=> "Ho! Ho! Ho! "
|
|
*/
|
|
|
|
VALUE
|
|
rb_str_times(VALUE str, VALUE times)
|
|
{
|
|
VALUE str2;
|
|
long i, len;
|
|
|
|
len = NUM2LONG(times);
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "negative argument");
|
|
}
|
|
if (len && LONG_MAX/len < RSTRING_LEN(str)) {
|
|
rb_raise(rb_eArgError, "argument too big");
|
|
}
|
|
|
|
str2 = rb_str_new5(str, 0, len *= RSTRING_LEN(str));
|
|
for (i = 0; i < len; i += RSTRING_LEN(str)) {
|
|
memcpy(RSTRING_PTR(str2) + i,
|
|
RSTRING_PTR(str), RSTRING_LEN(str));
|
|
}
|
|
RSTRING_PTR(str2)[RSTRING_LEN(str2)] = '\0';
|
|
OBJ_INFECT(str2, str);
|
|
rb_enc_copy(str2, str);
|
|
|
|
return str2;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str % arg => new_str
|
|
*
|
|
* Format---Uses <i>str</i> as a format specification, and returns the result
|
|
* of applying it to <i>arg</i>. If the format specification contains more than
|
|
* one substitution, then <i>arg</i> must be an <code>Array</code> containing
|
|
* the values to be substituted. See <code>Kernel::sprintf</code> for details
|
|
* of the format string.
|
|
*
|
|
* "%05d" % 123 #=> "00123"
|
|
* "%-5s: %08x" % [ "ID", self.id ] #=> "ID : 200e14d6"
|
|
*/
|
|
|
|
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_LEN(tmp), RARRAY_PTR(tmp), str);
|
|
}
|
|
return rb_str_format(1, &arg, str);
|
|
}
|
|
|
|
static void
|
|
str_modifiable(VALUE str)
|
|
{
|
|
if (FL_TEST(str, STR_TMPLOCK)) {
|
|
rb_raise(rb_eRuntimeError, "can't modify string; temporarily locked");
|
|
}
|
|
if (OBJ_FROZEN(str)) rb_error_frozen("string");
|
|
if (!OBJ_TAINTED(str) && rb_safe_level() >= 4)
|
|
rb_raise(rb_eSecurityError, "Insecure: can't modify string");
|
|
}
|
|
|
|
static int
|
|
str_independent(VALUE str)
|
|
{
|
|
str_modifiable(str);
|
|
if (!STR_SHARED_P(str)) return 1;
|
|
if (STR_EMBED_P(str)) return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
str_make_independent(VALUE str)
|
|
{
|
|
char *ptr;
|
|
long len = RSTRING_LEN(str);
|
|
|
|
ptr = ALLOC_N(char, len+1);
|
|
if (RSTRING_PTR(str)) {
|
|
memcpy(ptr, RSTRING_PTR(str), len);
|
|
}
|
|
STR_SET_NOEMBED(str);
|
|
ptr[len] = 0;
|
|
RSTRING(str)->as.heap.ptr = ptr;
|
|
RSTRING(str)->as.heap.aux.capa = len;
|
|
STR_UNSET_NOCAPA(str);
|
|
}
|
|
|
|
void
|
|
rb_str_modify(VALUE str)
|
|
{
|
|
if (!str_independent(str))
|
|
str_make_independent(str);
|
|
ENC_CODERANGE_CLEAR(str);
|
|
}
|
|
|
|
void
|
|
rb_str_associate(VALUE str, VALUE add)
|
|
{
|
|
if (STR_ASSOC_P(str)) {
|
|
/* sanity check */
|
|
if (OBJ_FROZEN(str)) rb_error_frozen("string");
|
|
/* already associated */
|
|
rb_ary_concat(RSTRING(str)->as.heap.aux.shared, add);
|
|
}
|
|
else {
|
|
if (STR_SHARED_P(str) || STR_EMBED_P(str)) {
|
|
str_make_independent(str);
|
|
}
|
|
else if (RSTRING(str)->as.heap.aux.capa != RSTRING_LEN(str)) {
|
|
RESIZE_CAPA(str, RSTRING_LEN(str));
|
|
}
|
|
FL_SET(str, STR_ASSOC);
|
|
RSTRING(str)->as.heap.aux.shared = add;
|
|
}
|
|
}
|
|
|
|
VALUE
|
|
rb_str_associated(VALUE str)
|
|
{
|
|
if (STR_ASSOC_P(str)) {
|
|
if (OBJ_FROZEN(str)) return Qfalse;
|
|
return RSTRING(str)->as.heap.aux.shared;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
VALUE
|
|
rb_string_value(volatile VALUE *ptr)
|
|
{
|
|
VALUE s = *ptr;
|
|
if (TYPE(s) != T_STRING) {
|
|
s = rb_str_to_str(s);
|
|
*ptr = s;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
char *
|
|
rb_string_value_ptr(volatile VALUE *ptr)
|
|
{
|
|
return RSTRING_PTR(rb_string_value(ptr));
|
|
}
|
|
|
|
char *
|
|
rb_string_value_cstr(volatile VALUE *ptr)
|
|
{
|
|
VALUE str = rb_string_value(ptr);
|
|
char *s = RSTRING_PTR(str);
|
|
|
|
if (!s || RSTRING_LEN(str) != strlen(s)) {
|
|
rb_raise(rb_eArgError, "string contains null byte");
|
|
}
|
|
return s;
|
|
}
|
|
|
|
VALUE
|
|
rb_check_string_type(VALUE str)
|
|
{
|
|
str = rb_check_convert_type(str, T_STRING, "String", "to_str");
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* String.try_convert(obj) -> string or nil
|
|
*
|
|
* Try to convert <i>obj</i> into a String, using to_str method.
|
|
* Returns converted regexp or nil if <i>obj</i> cannot be converted
|
|
* for any reason.
|
|
*
|
|
* String.try_convert("str") # => str
|
|
* String.try_convert(/re/) # => nil
|
|
*/
|
|
static VALUE
|
|
rb_str_s_try_convert(VALUE dummy, VALUE str)
|
|
{
|
|
return rb_check_string_type(str);
|
|
}
|
|
|
|
static char*
|
|
str_nth(char *p, char *e, int nth, rb_encoding *enc, int asc)
|
|
{
|
|
if (asc)
|
|
p += nth;
|
|
else
|
|
p = rb_enc_nth(p, e, nth, enc);
|
|
if (!p) return 0;
|
|
if (p > e) return e;
|
|
return p;
|
|
}
|
|
|
|
static int
|
|
str_offset(char *p, char *e, int nth, rb_encoding *enc, int asc)
|
|
{
|
|
const char *pp = str_nth(p, e, nth, enc, asc);
|
|
if (!pp) return e - p;
|
|
return pp - p;
|
|
}
|
|
|
|
static long
|
|
str_sublen(VALUE str, long pos, rb_encoding *enc)
|
|
{
|
|
if (rb_enc_mbmaxlen(enc) == 1 || pos < 0) return pos;
|
|
else {
|
|
char *p = RSTRING_PTR(str);
|
|
char *e = p + pos;
|
|
long i;
|
|
|
|
i = 0;
|
|
while (p < e) {
|
|
p += rb_enc_mbclen(p, RSTRING_END(str), enc);
|
|
i++;
|
|
}
|
|
if (p == e) return i;
|
|
return i - 1;
|
|
}
|
|
}
|
|
|
|
int
|
|
rb_str_sublen(VALUE str, int len)
|
|
{
|
|
return str_sublen(str, len, rb_enc_get(str));
|
|
}
|
|
|
|
VALUE
|
|
rb_str_subseq(VALUE str, long beg, long len)
|
|
{
|
|
VALUE str2 = rb_str_new5(str, RSTRING_PTR(str)+beg, len);
|
|
|
|
rb_enc_copy(str2, str);
|
|
OBJ_INFECT(str2, str);
|
|
|
|
return str2;
|
|
}
|
|
|
|
VALUE
|
|
rb_str_substr(VALUE str, long beg, long len)
|
|
{
|
|
rb_encoding *enc = rb_enc_get(str);
|
|
VALUE str2;
|
|
char *p, *s = RSTRING_PTR(str), *e = s + RSTRING_LEN(str);
|
|
int asc = IS_7BIT(str);
|
|
|
|
if (len < 0) return Qnil;
|
|
if (!RSTRING_LEN(str)) {
|
|
len = 0;
|
|
}
|
|
if (beg < 0) {
|
|
if (len > -beg) len = -beg;
|
|
if (-beg * rb_enc_mbmaxlen(enc) < RSTRING_LEN(str) / 8) {
|
|
beg = -beg;
|
|
while (len++ < beg && (e = rb_enc_prev_char(s, e, enc)) != 0);
|
|
p = e;
|
|
if (!p) return Qnil;
|
|
while (beg-- > 0 && (p = rb_enc_prev_char(s, p, enc)) != 0);
|
|
if (!p) return Qnil;
|
|
len = e - p;
|
|
goto sub;
|
|
}
|
|
else {
|
|
beg += str_strlen(str, enc);
|
|
if (beg < 0) return Qnil;
|
|
}
|
|
}
|
|
else if (beg > 0 && beg > str_strlen(str, enc)) {
|
|
return Qnil;
|
|
}
|
|
if (len == 0) {
|
|
p = 0;
|
|
}
|
|
else if ((p = str_nth(s, e, beg, enc, asc)) == e) {
|
|
len = 0;
|
|
}
|
|
else if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
|
|
long rest = (e - p) / rb_enc_mbmaxlen(enc);
|
|
if (len > rest)
|
|
len = rest;
|
|
else
|
|
len *= rb_enc_mbmaxlen(enc);
|
|
}
|
|
else {
|
|
len = str_offset(p, e, len, enc, asc);
|
|
}
|
|
sub:
|
|
str2 = rb_str_new5(str, p, len);
|
|
rb_enc_copy(str2, str);
|
|
OBJ_INFECT(str2, str);
|
|
|
|
return str2;
|
|
}
|
|
|
|
VALUE
|
|
rb_str_freeze(VALUE str)
|
|
{
|
|
return rb_obj_freeze(str);
|
|
}
|
|
|
|
VALUE
|
|
rb_str_dup_frozen(VALUE str)
|
|
{
|
|
if (STR_SHARED_P(str) && RSTRING(str)->as.heap.aux.shared) {
|
|
VALUE shared = RSTRING(str)->as.heap.aux.shared;
|
|
if (RSTRING_LEN(shared) == RSTRING_LEN(str)) {
|
|
OBJ_FREEZE(shared);
|
|
return shared;
|
|
}
|
|
}
|
|
if (OBJ_FROZEN(str)) return str;
|
|
str = rb_str_dup(str);
|
|
OBJ_FREEZE(str);
|
|
return str;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
void
|
|
rb_str_set_len(VALUE str, long len)
|
|
{
|
|
STR_SET_LEN(str, len);
|
|
RSTRING_PTR(str)[len] = '\0';
|
|
}
|
|
|
|
VALUE
|
|
rb_str_resize(VALUE str, long len)
|
|
{
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "negative string size (or size too big)");
|
|
}
|
|
|
|
rb_str_modify(str);
|
|
if (len != RSTRING_LEN(str)) {
|
|
if (STR_EMBED_P(str)) {
|
|
char *ptr;
|
|
if (len <= RSTRING_EMBED_LEN_MAX) {
|
|
STR_SET_EMBED_LEN(str, len);
|
|
RSTRING_PTR(str)[len] = '\0';
|
|
return str;
|
|
}
|
|
ptr = ALLOC_N(char,len+1);
|
|
MEMCPY(ptr, RSTRING_PTR(str), char, RSTRING_LEN(str));
|
|
RSTRING(str)->as.heap.ptr = ptr;
|
|
STR_SET_NOEMBED(str);
|
|
}
|
|
else if (RSTRING_LEN(str) < len || RSTRING_LEN(str) - len > 1024) {
|
|
REALLOC_N(RSTRING(str)->as.heap.ptr, char, len+1);
|
|
}
|
|
if (!STR_NOCAPA_P(str)) {
|
|
RSTRING(str)->as.heap.aux.capa = len;
|
|
}
|
|
RSTRING(str)->as.heap.len = len;
|
|
RSTRING(str)->as.heap.ptr[len] = '\0'; /* sentinel */
|
|
}
|
|
return str;
|
|
}
|
|
|
|
VALUE
|
|
rb_str_buf_cat(VALUE str, const char *ptr, long len)
|
|
{
|
|
long capa, total;
|
|
|
|
if (len == 0) return str;
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "negative string size (or size too big)");
|
|
}
|
|
rb_str_modify(str);
|
|
if (STR_ASSOC_P(str)) {
|
|
FL_UNSET(str, STR_ASSOC);
|
|
capa = RSTRING(str)->as.heap.aux.capa = RSTRING_LEN(str);
|
|
}
|
|
else if (STR_EMBED_P(str)) {
|
|
capa = RSTRING_EMBED_LEN_MAX;
|
|
}
|
|
else {
|
|
capa = RSTRING(str)->as.heap.aux.capa;
|
|
}
|
|
total = RSTRING_LEN(str)+len;
|
|
if (capa <= total) {
|
|
while (total > capa) {
|
|
capa = (capa + 1) * 2;
|
|
}
|
|
RESIZE_CAPA(str, capa);
|
|
}
|
|
memcpy(RSTRING_PTR(str) + RSTRING_LEN(str), ptr, len);
|
|
STR_SET_LEN(str, total);
|
|
RSTRING_PTR(str)[total] = '\0'; /* sentinel */
|
|
|
|
return str;
|
|
}
|
|
|
|
VALUE
|
|
rb_str_buf_cat2(VALUE str, const char *ptr)
|
|
{
|
|
return rb_str_buf_cat(str, ptr, strlen(ptr));
|
|
}
|
|
|
|
VALUE
|
|
rb_str_cat(VALUE str, const char *ptr, long len)
|
|
{
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "negative string size (or size too big)");
|
|
}
|
|
if (STR_ASSOC_P(str)) {
|
|
rb_str_modify(str);
|
|
if (STR_EMBED_P(str)) str_make_independent(str);
|
|
REALLOC_N(RSTRING(str)->as.heap.ptr, char, RSTRING(str)->as.heap.len+len);
|
|
memcpy(RSTRING(str)->as.heap.ptr + RSTRING(str)->as.heap.len, ptr, len);
|
|
RSTRING(str)->as.heap.len += len;
|
|
RSTRING(str)->as.heap.ptr[RSTRING(str)->as.heap.len] = '\0'; /* sentinel */
|
|
return str;
|
|
}
|
|
|
|
return rb_str_buf_cat(str, ptr, len);
|
|
}
|
|
|
|
VALUE
|
|
rb_str_cat2(VALUE str, const char *ptr)
|
|
{
|
|
return rb_str_cat(str, ptr, strlen(ptr));
|
|
}
|
|
|
|
VALUE
|
|
rb_str_buf_append(VALUE str, VALUE str2)
|
|
{
|
|
rb_encoding *enc;
|
|
long capa, len;
|
|
int cr1, cr2;
|
|
|
|
enc = rb_enc_check(str, str2);
|
|
cr1 = ENC_CODERANGE(str);
|
|
cr2 = ENC_CODERANGE(str2);
|
|
if (cr1 == ENC_CODERANGE_BROKEN || cr2 == ENC_CODERANGE_BROKEN) {
|
|
cr1 = ENC_CODERANGE_UNKNOWN;
|
|
}
|
|
else if (cr2 > cr1) {
|
|
cr1 = cr2;
|
|
}
|
|
rb_str_modify(str);
|
|
if (STR_ASSOC_P(str)) {
|
|
FL_UNSET(str, STR_ASSOC);
|
|
capa = RSTRING(str)->as.heap.aux.capa = RSTRING_LEN(str);
|
|
}
|
|
else if (STR_EMBED_P(str)) {
|
|
capa = RSTRING_EMBED_LEN_MAX;
|
|
}
|
|
else {
|
|
capa = RSTRING(str)->as.heap.aux.capa;
|
|
}
|
|
len = RSTRING_LEN(str)+RSTRING_LEN(str2);
|
|
if (capa <= len) {
|
|
while (len > capa) {
|
|
capa = (capa + 1) * 2;
|
|
}
|
|
RESIZE_CAPA(str, capa);
|
|
}
|
|
memcpy(RSTRING_PTR(str) + RSTRING_LEN(str),
|
|
RSTRING_PTR(str2), RSTRING_LEN(str2)+1);
|
|
STR_SET_LEN(str, len);
|
|
OBJ_INFECT(str, str2);
|
|
rb_enc_associate(str, enc);
|
|
if (cr1 != ENC_CODERANGE_UNKNOWN) {
|
|
ENC_CODERANGE_SET(str, cr1);
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
VALUE
|
|
rb_str_append(VALUE str, VALUE str2)
|
|
{
|
|
rb_encoding *enc;
|
|
int cr, cr2;
|
|
|
|
StringValue(str2);
|
|
enc = rb_enc_check(str, str2);
|
|
cr = ENC_CODERANGE(str);
|
|
if ((cr2 = ENC_CODERANGE(str2)) > cr) cr = cr2;
|
|
rb_str_modify(str);
|
|
if (RSTRING_LEN(str2) > 0) {
|
|
if (STR_ASSOC_P(str)) {
|
|
long len = RSTRING_LEN(str)+RSTRING_LEN(str2);
|
|
REALLOC_N(RSTRING(str)->as.heap.ptr, char, len+1);
|
|
memcpy(RSTRING(str)->as.heap.ptr + RSTRING(str)->as.heap.len,
|
|
RSTRING_PTR(str2), RSTRING_LEN(str2)+1);
|
|
RSTRING(str)->as.heap.len = len;
|
|
}
|
|
else {
|
|
rb_str_buf_append(str, str2);
|
|
}
|
|
}
|
|
OBJ_INFECT(str, str2);
|
|
rb_enc_associate(str, enc);
|
|
ENC_CODERANGE_SET(str, cr);
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str << fixnum => str
|
|
* str.concat(fixnum) => str
|
|
* str << obj => str
|
|
* str.concat(obj) => str
|
|
*
|
|
* Append---Concatenates the given object to <i>str</i>. If the object is a
|
|
* <code>Fixnum</code>, it is considered as a codepoint, and is converted
|
|
* to a character before concatenation.
|
|
*
|
|
* a = "hello "
|
|
* a << "world" #=> "hello world"
|
|
* a.concat(33) #=> "hello world!"
|
|
*/
|
|
|
|
VALUE
|
|
rb_str_concat(VALUE str1, VALUE str2)
|
|
{
|
|
if (FIXNUM_P(str2)) {
|
|
rb_encoding *enc = rb_enc_get(str1);
|
|
int c = FIX2INT(str2);
|
|
int pos = RSTRING_LEN(str1);
|
|
int len = rb_enc_codelen(c, enc);
|
|
|
|
if (len == 0) {
|
|
rb_raise(rb_eArgError, "invalid codepoint 0x%x", c);
|
|
}
|
|
rb_str_resize(str1, pos+len);
|
|
rb_enc_mbcput(c, RSTRING_PTR(str1)+pos, enc);
|
|
return str1;
|
|
}
|
|
return rb_str_append(str1, str2);
|
|
}
|
|
|
|
typedef unsigned int ub4; /* unsigned 4-byte quantities */
|
|
typedef unsigned char ub1; /* unsigned 1-byte quantities */
|
|
|
|
#define hashsize(n) ((ub4)1<<(n))
|
|
#define hashmask(n) (hashsize(n)-1)
|
|
|
|
/*
|
|
--------------------------------------------------------------------
|
|
mix -- mix 3 32-bit values reversibly.
|
|
For every delta with one or two bits set, and the deltas of all three
|
|
high bits or all three low bits, whether the original value of a,b,c
|
|
is almost all zero or is uniformly distributed,
|
|
* If mix() is run forward or backward, at least 32 bits in a,b,c
|
|
have at least 1/4 probability of changing.
|
|
* If mix() is run forward, every bit of c will change between 1/3 and
|
|
2/3 of the time. (Well, 22/100 and 78/100 for some 2-bit deltas.)
|
|
mix() was built out of 36 single-cycle latency instructions in a
|
|
structure that could supported 2x parallelism, like so:
|
|
a -= b;
|
|
a -= c; x = (c>>13);
|
|
b -= c; a ^= x;
|
|
b -= a; x = (a<<8);
|
|
c -= a; b ^= x;
|
|
c -= b; x = (b>>13);
|
|
...
|
|
Unfortunately, superscalar Pentiums and Sparcs can't take advantage
|
|
of that parallelism. They've also turned some of those single-cycle
|
|
latency instructions into multi-cycle latency instructions. Still,
|
|
this is the fastest good hash I could find. There were about 2^^68
|
|
to choose from. I only looked at a billion or so.
|
|
--------------------------------------------------------------------
|
|
*/
|
|
#define mix(a,b,c) \
|
|
{ \
|
|
a -= b; a -= c; a ^= (c>>13); \
|
|
b -= c; b -= a; b ^= (a<<8); \
|
|
c -= a; c -= b; c ^= (b>>13); \
|
|
a -= b; a -= c; a ^= (c>>12); \
|
|
b -= c; b -= a; b ^= (a<<16); \
|
|
c -= a; c -= b; c ^= (b>>5); \
|
|
a -= b; a -= c; a ^= (c>>3); \
|
|
b -= c; b -= a; b ^= (a<<10); \
|
|
c -= a; c -= b; c ^= (b>>15); \
|
|
}
|
|
|
|
/*
|
|
--------------------------------------------------------------------
|
|
hash() -- hash a variable-length key into a 32-bit value
|
|
k : the key (the unaligned variable-length array of bytes)
|
|
len : the length of the key, counting by bytes
|
|
initval : can be any 4-byte value
|
|
Returns a 32-bit value. Every bit of the key affects every bit of
|
|
the return value. Every 1-bit and 2-bit delta achieves avalanche.
|
|
About 6*len+35 instructions.
|
|
|
|
The best hash table sizes are powers of 2. There is no need to do
|
|
mod a prime (mod is sooo slow!). If you need less than 32 bits,
|
|
use a bitmask. For example, if you need only 10 bits, do
|
|
h = (h & hashmask(10));
|
|
In which case, the hash table should have hashsize(10) elements.
|
|
|
|
If you are hashing n strings (ub1 **)k, do it like this:
|
|
for (i=0, h=0; i<n; ++i) h = hash( k[i], len[i], h);
|
|
|
|
By Bob Jenkins, 1996. bob_jenkins@burtleburtle.net. You may use this
|
|
code any way you wish, private, educational, or commercial. It's free.
|
|
|
|
See http://burtleburtle.net/bob/hash/evahash.html
|
|
Use for hash table lookup, or anything where one collision in 2^^32 is
|
|
acceptable. Do NOT use for cryptographic purposes.
|
|
--------------------------------------------------------------------
|
|
*/
|
|
|
|
static ub4
|
|
hash(const ub1 *k, ub4 length, ub4 initval)
|
|
/* k: the key */
|
|
/* length: the length of the key */
|
|
/* initval: the previous hash, or an arbitrary value */
|
|
{
|
|
register ub4 a,b,c,len;
|
|
|
|
/* Set up the internal state */
|
|
len = length;
|
|
a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */
|
|
c = initval; /* the previous hash value */
|
|
|
|
/*---------------------------------------- handle most of the key */
|
|
while (len >= 12) {
|
|
a += (k[0] +((ub4)k[1]<<8) +((ub4)k[2]<<16) +((ub4)k[3]<<24));
|
|
b += (k[4] +((ub4)k[5]<<8) +((ub4)k[6]<<16) +((ub4)k[7]<<24));
|
|
c += (k[8] +((ub4)k[9]<<8) +((ub4)k[10]<<16)+((ub4)k[11]<<24));
|
|
mix(a,b,c);
|
|
k += 12; len -= 12;
|
|
}
|
|
|
|
/*------------------------------------- handle the last 11 bytes */
|
|
c += length;
|
|
switch(len) /* all the case statements fall through */
|
|
{
|
|
case 11: c+=((ub4)k[10]<<24);
|
|
case 10: c+=((ub4)k[9]<<16);
|
|
case 9 : c+=((ub4)k[8]<<8);
|
|
/* the first byte of c is reserved for the length */
|
|
case 8 : b+=((ub4)k[7]<<24);
|
|
case 7 : b+=((ub4)k[6]<<16);
|
|
case 6 : b+=((ub4)k[5]<<8);
|
|
case 5 : b+=k[4];
|
|
case 4 : a+=((ub4)k[3]<<24);
|
|
case 3 : a+=((ub4)k[2]<<16);
|
|
case 2 : a+=((ub4)k[1]<<8);
|
|
case 1 : a+=k[0];
|
|
/* case 0: nothing left to add */
|
|
}
|
|
mix(a,b,c);
|
|
/*-------------------------------------------- report the result */
|
|
return c;
|
|
}
|
|
|
|
int
|
|
rb_memhash(const void *ptr, long len)
|
|
{
|
|
return hash(ptr, len, 0);
|
|
}
|
|
|
|
int
|
|
rb_str_hash(VALUE str)
|
|
{
|
|
int e = rb_enc_get_index(str);
|
|
if (e && is_ascii_string(str)) {
|
|
e = 0;
|
|
}
|
|
return hash((const void *)RSTRING_PTR(str), RSTRING_LEN(str), e);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.hash => fixnum
|
|
*
|
|
* Return a hash based on the string's length and content.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_hash_m(VALUE str)
|
|
{
|
|
int hval = rb_str_hash(str);
|
|
return INT2FIX(hval);
|
|
}
|
|
|
|
#define lesser(a,b) (((a)>(b))?(b):(a))
|
|
|
|
int
|
|
rb_str_comparable(VALUE str1, VALUE str2)
|
|
{
|
|
int idx1 = rb_enc_get_index(str1);
|
|
int idx2 = rb_enc_get_index(str2);
|
|
int rc1, rc2;
|
|
|
|
if (idx1 == idx2) return Qtrue;
|
|
rc1 = rb_enc_str_coderange(str1);
|
|
rc2 = rb_enc_str_coderange(str2);
|
|
if (rc1 == ENC_CODERANGE_7BIT) {
|
|
if (rc2 == ENC_CODERANGE_7BIT) return Qtrue;
|
|
if (rb_enc_asciicompat(rb_enc_from_index(idx1)))
|
|
return Qtrue;
|
|
}
|
|
if (rc2 == ENC_CODERANGE_7BIT) {
|
|
if (rb_enc_asciicompat(rb_enc_from_index(idx2)))
|
|
return Qtrue;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
int
|
|
rb_str_cmp(VALUE str1, VALUE str2)
|
|
{
|
|
long len;
|
|
int retval;
|
|
rb_encoding *enc;
|
|
|
|
enc = rb_enc_compatible(str1, str2);
|
|
len = lesser(RSTRING_LEN(str1), RSTRING_LEN(str2));
|
|
retval = memcmp(RSTRING_PTR(str1), RSTRING_PTR(str2), len);
|
|
if (retval == 0) {
|
|
if (RSTRING_LEN(str1) == RSTRING_LEN(str2)) {
|
|
if (!enc) {
|
|
if (rb_enc_get(str1) - rb_enc_get(str2) > 0)
|
|
return 1;
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
if (RSTRING_LEN(str1) > RSTRING_LEN(str2)) return 1;
|
|
return -1;
|
|
}
|
|
if (retval > 0) return 1;
|
|
return -1;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str == obj => true or false
|
|
*
|
|
* Equality---If <i>obj</i> is not a <code>String</code>, returns
|
|
* <code>false</code>. Otherwise, returns <code>true</code> if <i>str</i>
|
|
* <code><=></code> <i>obj</i> returns zero.
|
|
*/
|
|
|
|
VALUE
|
|
rb_str_equal(VALUE str1, VALUE str2)
|
|
{
|
|
if (str1 == str2) return Qtrue;
|
|
if (TYPE(str2) != T_STRING) {
|
|
if (!rb_respond_to(str2, rb_intern("to_str"))) {
|
|
return Qfalse;
|
|
}
|
|
return rb_equal(str2, str1);
|
|
}
|
|
if (!rb_str_comparable(str1, str2)) return Qfalse;
|
|
if (RSTRING_LEN(str1) == RSTRING_LEN(str2) &&
|
|
rb_str_cmp(str1, str2) == 0) {
|
|
return Qtrue;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.eql?(other) => true or false
|
|
*
|
|
* Two strings are equal if the have the same length and content.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_eql(VALUE str1, VALUE str2)
|
|
{
|
|
if (TYPE(str2) != T_STRING || RSTRING_LEN(str1) != RSTRING_LEN(str2))
|
|
return Qfalse;
|
|
|
|
if (!rb_str_comparable(str1, str2)) return Qfalse;
|
|
if (memcmp(RSTRING_PTR(str1), RSTRING_PTR(str2),
|
|
lesser(RSTRING_LEN(str1), RSTRING_LEN(str2))) == 0)
|
|
return Qtrue;
|
|
|
|
return Qfalse;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str <=> other_str => -1, 0, +1
|
|
*
|
|
* Comparison---Returns -1 if <i>other_str</i> is less than, 0 if
|
|
* <i>other_str</i> is equal to, and +1 if <i>other_str</i> is greater than
|
|
* <i>str</i>. If the strings are of different lengths, and the strings are
|
|
* equal when compared up to the shortest length, then the longer string is
|
|
* considered greater than the shorter one. In older versions of Ruby, setting
|
|
* <code>$=</code> allowed case-insensitive comparisons; this is now deprecated
|
|
* in favor of using <code>String#casecmp</code>.
|
|
*
|
|
* <code><=></code> is the basis for the methods <code><</code>,
|
|
* <code><=</code>, <code>></code>, <code>>=</code>, and <code>between?</code>,
|
|
* included from module <code>Comparable</code>. The method
|
|
* <code>String#==</code> does not use <code>Comparable#==</code>.
|
|
*
|
|
* "abcdef" <=> "abcde" #=> 1
|
|
* "abcdef" <=> "abcdef" #=> 0
|
|
* "abcdef" <=> "abcdefg" #=> -1
|
|
* "abcdef" <=> "ABCDEF" #=> 1
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_cmp_m(VALUE str1, VALUE str2)
|
|
{
|
|
long result;
|
|
|
|
if (TYPE(str2) != T_STRING) {
|
|
if (!rb_respond_to(str2, rb_intern("to_str"))) {
|
|
return Qnil;
|
|
}
|
|
else if (!rb_respond_to(str2, rb_intern("<=>"))) {
|
|
return Qnil;
|
|
}
|
|
else {
|
|
VALUE tmp = rb_funcall(str2, rb_intern("<=>"), 1, str1);
|
|
|
|
if (NIL_P(tmp)) return Qnil;
|
|
if (!FIXNUM_P(tmp)) {
|
|
return rb_funcall(LONG2FIX(0), '-', 1, tmp);
|
|
}
|
|
result = -FIX2LONG(tmp);
|
|
}
|
|
}
|
|
else {
|
|
result = rb_str_cmp(str1, str2);
|
|
}
|
|
return LONG2NUM(result);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.casecmp(other_str) => -1, 0, +1
|
|
*
|
|
* Case-insensitive version of <code>String#<=></code>.
|
|
*
|
|
* "abcdef".casecmp("abcde") #=> 1
|
|
* "aBcDeF".casecmp("abcdef") #=> 0
|
|
* "abcdef".casecmp("abcdefg") #=> -1
|
|
* "abcdef".casecmp("ABCDEF") #=> 0
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_casecmp(VALUE str1, VALUE str2)
|
|
{
|
|
long len;
|
|
rb_encoding *enc;
|
|
char *p1, *p1end, *p2, *p2end;
|
|
|
|
StringValue(str2);
|
|
enc = rb_enc_compatible(str1, str2);
|
|
if (!enc) {
|
|
return rb_str_cmp(str1, str2);
|
|
}
|
|
|
|
p1 = RSTRING_PTR(str1); p1end = RSTRING_END(p1);
|
|
p2 = RSTRING_PTR(str2); p2end = RSTRING_END(str2);
|
|
while (p1 < p1end && p2 < p2end) {
|
|
int c1 = rb_enc_codepoint(p1, p1end, enc);
|
|
int c2 = rb_enc_codepoint(p2, p2end, enc);
|
|
|
|
if (c1 != c2) {
|
|
c1 = rb_enc_toupper(c1, enc);
|
|
c2 = rb_enc_toupper(c2, enc);
|
|
if (c1 > c2) return INT2FIX(1);
|
|
if (c1 < c2) return INT2FIX(-1);
|
|
}
|
|
len = rb_enc_codelen(c1, enc);
|
|
p1 += len;
|
|
p2 += len;
|
|
}
|
|
if (RSTRING_LEN(str1) == RSTRING_LEN(str2)) return INT2FIX(0);
|
|
if (RSTRING_LEN(str1) > RSTRING_LEN(str2)) return INT2FIX(1);
|
|
return INT2FIX(-1);
|
|
}
|
|
|
|
static long
|
|
rb_str_index(VALUE str, VALUE sub, long offset)
|
|
{
|
|
long pos;
|
|
char *s, *sptr;
|
|
long len, slen;
|
|
rb_encoding *enc;
|
|
|
|
enc = rb_enc_check(str, sub);
|
|
if (is_broken_string(sub)) {
|
|
return -1;
|
|
}
|
|
len = str_strlen(str, enc);
|
|
slen = str_strlen(sub, enc);
|
|
if (offset < 0) {
|
|
offset += len;
|
|
if (offset < 0) return -1;
|
|
}
|
|
if (len - offset < slen) return -1;
|
|
s = RSTRING_PTR(str);
|
|
if (offset) {
|
|
offset = str_offset(s, RSTRING_END(str), offset, enc, IS_7BIT(str));
|
|
s += offset;
|
|
}
|
|
if (slen == 0) return offset;
|
|
/* need proceed one character at a time */
|
|
sptr = RSTRING_PTR(sub);
|
|
slen = RSTRING_LEN(sub);
|
|
len = RSTRING_LEN(str) - offset;
|
|
for (;;) {
|
|
char *t;
|
|
pos = rb_memsearch(sptr, slen, s, len);
|
|
if (pos < 0) return pos;
|
|
t = (char *)onigenc_get_right_adjust_char_head(enc, (const UChar *)s,
|
|
(const UChar *)s + pos);
|
|
if (t == s) break;
|
|
if ((len -= t - s) <= 0) return -1;
|
|
offset += t - s;
|
|
s = t;
|
|
}
|
|
return pos + offset;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.index(substring [, offset]) => fixnum or nil
|
|
* str.index(fixnum [, offset]) => fixnum or nil
|
|
* str.index(regexp [, offset]) => fixnum or nil
|
|
*
|
|
* Returns the index of the first occurrence of the given <i>substring</i>,
|
|
* character (<i>fixnum</i>), or pattern (<i>regexp</i>) in <i>str</i>. Returns
|
|
* <code>nil</code> if not found. If the second parameter is present, it
|
|
* specifies the position in the string to begin the search.
|
|
*
|
|
* "hello".index('e') #=> 1
|
|
* "hello".index('lo') #=> 3
|
|
* "hello".index('a') #=> nil
|
|
* "hello".index(101) #=> 1
|
|
* "hello".index(/[aeiou]/, -3) #=> 4
|
|
*/
|
|
|
|
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, rb_enc_get(str));
|
|
if (pos < 0) {
|
|
if (TYPE(sub) == T_REGEXP) {
|
|
rb_backref_set(Qnil);
|
|
}
|
|
return Qnil;
|
|
}
|
|
}
|
|
|
|
switch (TYPE(sub)) {
|
|
case T_REGEXP:
|
|
pos = rb_reg_adjust_startpos(sub, str, pos, 0);
|
|
pos = rb_reg_search(sub, str, pos, 0);
|
|
pos = rb_str_sublen(str, pos);
|
|
break;
|
|
|
|
default: {
|
|
VALUE tmp;
|
|
|
|
tmp = rb_check_string_type(sub);
|
|
if (NIL_P(tmp)) {
|
|
rb_raise(rb_eTypeError, "type mismatch: %s given",
|
|
rb_obj_classname(sub));
|
|
}
|
|
sub = tmp;
|
|
}
|
|
/* fall through */
|
|
case T_STRING:
|
|
pos = rb_str_index(str, sub, pos);
|
|
pos = rb_str_sublen(str, pos);
|
|
break;
|
|
}
|
|
|
|
if (pos == -1) return Qnil;
|
|
return LONG2NUM(pos);
|
|
}
|
|
|
|
static long
|
|
rb_str_rindex(VALUE str, VALUE sub, long pos)
|
|
{
|
|
long len, slen;
|
|
char *s, *sbeg, *e, *t;
|
|
rb_encoding *enc;
|
|
int asc = IS_7BIT(str);
|
|
|
|
enc = rb_enc_check(str, sub);
|
|
if (is_broken_string(sub)) {
|
|
return -1;
|
|
}
|
|
len = str_strlen(str, enc);
|
|
slen = str_strlen(sub, enc);
|
|
/* 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);
|
|
e = RSTRING_END(str);
|
|
t = RSTRING_PTR(sub);
|
|
slen = RSTRING_LEN(sub);
|
|
for (;;) {
|
|
s = str_nth(sbeg, e, pos, enc, asc);
|
|
if (!s) return -1;
|
|
if (memcmp(s, t, slen) == 0) {
|
|
return pos;
|
|
}
|
|
if (pos == 0) break;
|
|
pos--;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.rindex(substring [, fixnum]) => fixnum or nil
|
|
* str.rindex(fixnum [, fixnum]) => fixnum or nil
|
|
* str.rindex(regexp [, fixnum]) => fixnum or nil
|
|
*
|
|
* Returns the index of the last occurrence of the given <i>substring</i>,
|
|
* character (<i>fixnum</i>), or pattern (<i>regexp</i>) in <i>str</i>. Returns
|
|
* <code>nil</code> if not found. If the second parameter is present, it
|
|
* specifies the position in the string to end the search---characters beyond
|
|
* this point will not be considered.
|
|
*
|
|
* "hello".rindex('e') #=> 1
|
|
* "hello".rindex('l') #=> 3
|
|
* "hello".rindex('a') #=> nil
|
|
* "hello".rindex(101) #=> 1
|
|
* "hello".rindex(/[aeiou]/, -2) #=> 1
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_rindex_m(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
VALUE sub;
|
|
VALUE vpos;
|
|
rb_encoding *enc = rb_enc_get(str);
|
|
long pos, len = str_strlen(str, enc);
|
|
|
|
if (rb_scan_args(argc, argv, "11", &sub, &vpos) == 2) {
|
|
pos = NUM2LONG(vpos);
|
|
if (pos < 0) {
|
|
pos += len;
|
|
if (pos < 0) {
|
|
if (TYPE(sub) == T_REGEXP) {
|
|
rb_backref_set(Qnil);
|
|
}
|
|
return Qnil;
|
|
}
|
|
}
|
|
if (pos > len) pos = len;
|
|
}
|
|
else {
|
|
pos = len;
|
|
}
|
|
|
|
switch (TYPE(sub)) {
|
|
case T_REGEXP:
|
|
/* enc = rb_get_check(str, sub); */
|
|
if (RREGEXP(sub)->len) {
|
|
pos = rb_reg_adjust_startpos(sub, str, pos, 1);
|
|
pos = rb_reg_search(sub, str, pos, 1);
|
|
pos = rb_str_sublen(str, pos);
|
|
}
|
|
if (pos >= 0) return LONG2NUM(pos);
|
|
break;
|
|
|
|
default: {
|
|
VALUE tmp;
|
|
|
|
tmp = rb_check_string_type(sub);
|
|
if (NIL_P(tmp)) {
|
|
rb_raise(rb_eTypeError, "type mismatch: %s given",
|
|
rb_obj_classname(sub));
|
|
}
|
|
sub = tmp;
|
|
}
|
|
/* fall through */
|
|
case T_STRING:
|
|
pos = rb_str_rindex(str, sub, pos);
|
|
if (pos >= 0) return LONG2NUM(pos);
|
|
break;
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str =~ obj => fixnum or nil
|
|
*
|
|
* Match---If <i>obj</i> is a <code>Regexp</code>, use it as a pattern to match
|
|
* against <i>str</i>,and returns the position the match starts, or
|
|
* <code>nil</code> if there is no match. Otherwise, invokes
|
|
* <i>obj.=~</i>, passing <i>str</i> as an argument. The default
|
|
* <code>=~</code> in <code>Object</code> returns <code>false</code>.
|
|
*
|
|
* "cat o' 9 tails" =~ /\d/ #=> 7
|
|
* "cat o' 9 tails" =~ 9 #=> false
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_match(VALUE x, VALUE y)
|
|
{
|
|
switch (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, rb_intern("=~"), 1, x);
|
|
}
|
|
}
|
|
|
|
|
|
static VALUE get_pat(VALUE, int);
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.match(pattern) => matchdata or nil
|
|
*
|
|
* Converts <i>pattern</i> to a <code>Regexp</code> (if it isn't already one),
|
|
* then invokes its <code>match</code> method on <i>str</i>. If the second
|
|
* parameter is present, it specifies the position in the string to begin the
|
|
* search.
|
|
*
|
|
* 'hello'.match('(.)\1') #=> #<MatchData "ll" "l">
|
|
* 'hello'.match('(.)\1')[0] #=> "ll"
|
|
* 'hello'.match(/(.)\1/)[0] #=> "ll"
|
|
* 'hello'.match('xx') #=> nil
|
|
*
|
|
* If a block is given, invoke the block with MatchData if match succeed, so
|
|
* that you can write
|
|
*
|
|
* str.match(pat) {|m| ...}
|
|
*
|
|
* instead of
|
|
*
|
|
* if m = str.match(pat)
|
|
* ...
|
|
* end
|
|
*
|
|
* The retuen value is a value from block exection in this case.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_match_m(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
VALUE re, result;
|
|
if (argc < 1)
|
|
rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc);
|
|
re = argv[0];
|
|
argv[0] = str;
|
|
result = rb_funcall2(get_pat(re, 0), rb_intern("match"), argc, argv);
|
|
if (!NIL_P(result) && rb_block_given_p()) {
|
|
return rb_yield(result);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
succ_char(char *s)
|
|
{
|
|
char c = *s;
|
|
|
|
/* numerics */
|
|
if ('0' <= c && c < '9') (*s)++;
|
|
else if (c == '9') {
|
|
*s = '0';
|
|
return '1';
|
|
}
|
|
/* small alphabets */
|
|
else if ('a' <= c && c < 'z') (*s)++;
|
|
else if (c == 'z') {
|
|
return *s = 'a';
|
|
}
|
|
/* capital alphabets */
|
|
else if ('A' <= c && c < 'Z') (*s)++;
|
|
else if (c == 'Z') {
|
|
return *s = 'A';
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
overwrite +s+ by succeeding letter of +c+ in +enc+ and returns
|
|
carried-out letter. assuming each ranges are successive, and mbclen
|
|
never change in each ranges.
|
|
*/
|
|
static int
|
|
enc_succ_char(unsigned int c, char *s, rb_encoding *enc)
|
|
{
|
|
unsigned int cs;
|
|
|
|
/* numerics */
|
|
if (rb_enc_isdigit(c, enc)) {
|
|
cs = c++;
|
|
if (rb_enc_isdigit(c, enc)) {
|
|
rb_enc_mbcput(c, s, enc);
|
|
return 0;
|
|
}
|
|
do c = cs--; while (rb_enc_isdigit(cs, enc));
|
|
rb_enc_mbcput(c, s, enc);
|
|
return ++c;
|
|
}
|
|
/* small alphabets */
|
|
if (rb_enc_islower(c, enc)) {
|
|
cs = c++;
|
|
if (rb_enc_islower(c, enc)) {
|
|
rb_enc_mbcput(c, s, enc);
|
|
return 0;
|
|
}
|
|
do c = cs--; while (rb_enc_islower(cs, enc));
|
|
rb_enc_mbcput(c, s, enc);
|
|
return c;
|
|
}
|
|
/* capital alphabets */
|
|
if (rb_enc_isupper(c, enc)) {
|
|
cs = c++;
|
|
if (rb_enc_isupper(c, enc)) {
|
|
rb_enc_mbcput(c, s, enc);
|
|
return 0;
|
|
}
|
|
do c = cs--; while (rb_enc_isupper(cs, enc));
|
|
rb_enc_mbcput(c, s, enc);
|
|
return c;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.succ => new_str
|
|
* str.next => new_str
|
|
*
|
|
* Returns the successor to <i>str</i>. The successor is calculated by
|
|
* incrementing characters starting from the rightmost alphanumeric (or
|
|
* the rightmost character if there are no alphanumerics) in the
|
|
* string. Incrementing a digit always results in another digit, and
|
|
* incrementing a letter results in another letter of the same case.
|
|
* Incrementing nonalphanumerics uses the underlying character set's
|
|
* collating sequence.
|
|
*
|
|
* If the increment generates a ``carry,'' the character to the left of
|
|
* it is incremented. This process repeats until there is no carry,
|
|
* adding an additional character if necessary.
|
|
*
|
|
* "abcd".succ #=> "abce"
|
|
* "THX1138".succ #=> "THX1139"
|
|
* "<<koala>>".succ #=> "<<koalb>>"
|
|
* "1999zzz".succ #=> "2000aaa"
|
|
* "ZZZ9999".succ #=> "AAAA0000"
|
|
* "***".succ #=> "**+"
|
|
*/
|
|
|
|
VALUE
|
|
rb_str_succ(VALUE orig)
|
|
{
|
|
rb_encoding *enc;
|
|
VALUE str;
|
|
char *sbeg, *s, *e;
|
|
int c = -1;
|
|
unsigned int cc = 0;
|
|
long n = 0, o = 0, l;
|
|
char carry[ONIGENC_CODE_TO_MBC_MAXLEN];
|
|
|
|
str = rb_str_new5(orig, RSTRING_PTR(orig), RSTRING_LEN(orig));
|
|
rb_enc_copy(str, orig);
|
|
OBJ_INFECT(str, orig);
|
|
if (RSTRING_LEN(str) == 0) return str;
|
|
|
|
enc = rb_enc_get(orig);
|
|
sbeg = RSTRING_PTR(str);
|
|
s = e = sbeg + RSTRING_LEN(str);
|
|
|
|
while ((s = rb_enc_prev_char(sbeg, s, enc)) != 0) {
|
|
cc = rb_enc_codepoint(s, e, enc);
|
|
if (rb_enc_isalnum(cc, enc)) {
|
|
if (rb_enc_isascii(cc, enc)) {
|
|
if ((c = succ_char(s)) == 0) break;
|
|
}
|
|
else {
|
|
if ((c = enc_succ_char(cc, s, enc)) == 0) break;
|
|
}
|
|
n = s - sbeg;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
if (c == -1) { /* str contains no alnum */
|
|
c = '\001';
|
|
s = e;
|
|
while ((s = rb_enc_prev_char(sbeg, s, enc)) != 0) {
|
|
int limit = 256;
|
|
if (cc == 0) cc = rb_enc_codepoint(s, e, enc);
|
|
while ((l = rb_enc_mbcput(++cc, carry, enc)) < 0 && --limit);
|
|
if (l > 0) {
|
|
if (l == (o = e - s)) goto overlay;
|
|
n = s - sbeg;
|
|
goto insert;
|
|
}
|
|
}
|
|
}
|
|
if (!s && (l = rb_enc_mbcput(c, carry, enc)) > 0) {
|
|
insert:
|
|
RESIZE_CAPA(str, RSTRING_LEN(str) + l - o);
|
|
s = RSTRING_PTR(str) + n;
|
|
memmove(s + l, s + o, RSTRING_LEN(str) - n - o);
|
|
overlay:
|
|
memmove(s, carry, l);
|
|
STR_SET_LEN(str, RSTRING_LEN(str) + l - o);
|
|
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.succ! => str
|
|
* str.next! => str
|
|
*
|
|
* Equivalent to <code>String#succ</code>, but modifies the receiver in
|
|
* place.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_succ_bang(VALUE str)
|
|
{
|
|
rb_str_shared_replace(str, rb_str_succ(str));
|
|
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.upto(other_str, exclusive=false) {|s| block } => str
|
|
*
|
|
* Iterates through successive values, starting at <i>str</i> and
|
|
* ending at <i>other_str</i> inclusive, passing each value in turn to
|
|
* the block. The <code>String#succ</code> method is used to generate
|
|
* each value. If optional second arguent excle is omitted or is <code>false</code>,
|
|
* the last value will be included; otherwise it will be excluded.
|
|
*
|
|
* "a8".upto("b6") {|s| print s, ' ' }
|
|
* for s in "a8".."b6"
|
|
* print s, ' '
|
|
* end
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* a8 a9 b0 b1 b2 b3 b4 b5 b6
|
|
* a8 a9 b0 b1 b2 b3 b4 b5 b6
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_upto(int argc, VALUE *argv, VALUE beg)
|
|
{
|
|
VALUE end, exclusive;
|
|
VALUE current, after_end;
|
|
ID succ;
|
|
int n, excl;
|
|
|
|
rb_scan_args(argc, argv, "11", &end, &exclusive);
|
|
rb_enc_check(beg, end);
|
|
excl = RTEST(exclusive);
|
|
succ = rb_intern("succ");
|
|
StringValue(end);
|
|
n = rb_str_cmp(beg, end);
|
|
if (n > 0 || (excl && n == 0)) return beg;
|
|
after_end = rb_funcall(end, succ, 0, 0);
|
|
current = beg;
|
|
while (!rb_str_equal(current, after_end)) {
|
|
rb_yield(current);
|
|
if (!excl && rb_str_equal(current, end)) break;
|
|
current = rb_funcall(current, succ, 0, 0);
|
|
StringValue(current);
|
|
if (excl && rb_str_equal(current, end)) break;
|
|
StringValue(current);
|
|
if (RSTRING_LEN(current) > RSTRING_LEN(end) || RSTRING_LEN(current) == 0)
|
|
break;
|
|
}
|
|
|
|
return beg;
|
|
}
|
|
|
|
static VALUE
|
|
rb_str_subpat(VALUE str, VALUE re, int nth)
|
|
{
|
|
if (rb_reg_search(re, str, 0, 0) >= 0) {
|
|
return rb_reg_nth_match(nth, rb_backref_get());
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
static VALUE
|
|
rb_str_aref(VALUE str, VALUE indx)
|
|
{
|
|
long idx;
|
|
|
|
switch (TYPE(indx)) {
|
|
case T_FIXNUM:
|
|
idx = FIX2LONG(indx);
|
|
|
|
num_index:
|
|
str = rb_str_substr(str, idx, 1);
|
|
if (!NIL_P(str) && RSTRING_LEN(str) == 0) return Qnil;
|
|
return str;
|
|
|
|
case T_REGEXP:
|
|
return rb_str_subpat(str, indx, 0);
|
|
|
|
case T_STRING:
|
|
if (rb_str_index(str, indx, 0) != -1)
|
|
return rb_str_dup(indx);
|
|
return Qnil;
|
|
|
|
default:
|
|
/* check if indx is Range */
|
|
{
|
|
long beg, len;
|
|
VALUE tmp;
|
|
|
|
len = str_strlen(str, rb_enc_get(str));
|
|
switch (rb_range_beg_len(indx, &beg, &len, len, 0)) {
|
|
case Qfalse:
|
|
break;
|
|
case Qnil:
|
|
return Qnil;
|
|
default:
|
|
tmp = rb_str_substr(str, beg, len);
|
|
return tmp;
|
|
}
|
|
}
|
|
idx = NUM2LONG(indx);
|
|
goto num_index;
|
|
}
|
|
return Qnil; /* not reached */
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str[fixnum] => new_str or nil
|
|
* str[fixnum, fixnum] => new_str or nil
|
|
* str[range] => new_str or nil
|
|
* str[regexp] => new_str or nil
|
|
* str[regexp, fixnum] => new_str or nil
|
|
* str[other_str] => new_str or nil
|
|
* str.slice(fixnum) => new_str or nil
|
|
* str.slice(fixnum, fixnum) => new_str or nil
|
|
* str.slice(range) => new_str or nil
|
|
* str.slice(regexp) => new_str or nil
|
|
* str.slice(regexp, fixnum) => new_str or nil
|
|
* str.slice(other_str) => new_str or nil
|
|
*
|
|
* Element Reference---If passed a single <code>Fixnum</code>, returns a
|
|
* substring of one character at that position. If passed two <code>Fixnum</code>
|
|
* objects, returns a substring starting at the offset given by the first, and
|
|
* a length given by the second. If given a range, a substring containing
|
|
* characters at offsets given by the range is returned. In all three cases, if
|
|
* an offset is negative, it is counted from the end of <i>str</i>. Returns
|
|
* <code>nil</code> if the initial offset falls outside the string, the length
|
|
* is negative, or the beginning of the range is greater than the end.
|
|
*
|
|
* If a <code>Regexp</code> is supplied, the matching portion of <i>str</i> is
|
|
* returned. If a numeric parameter follows the regular expression, that
|
|
* component of the <code>MatchData</code> is returned instead. If a
|
|
* <code>String</code> is given, that string is returned if it occurs in
|
|
* <i>str</i>. In both cases, <code>nil</code> is returned if there is no
|
|
* match.
|
|
*
|
|
* a = "hello there"
|
|
* a[1] #=> "e"
|
|
* a[1,3] #=> "ell"
|
|
* a[1..3] #=> "ell"
|
|
* a[-3,2] #=> "er"
|
|
* a[-4..-2] #=> "her"
|
|
* a[12..-1] #=> nil
|
|
* a[-2..-4] #=> ""
|
|
* a[/[aeiou](.)\1/] #=> "ell"
|
|
* a[/[aeiou](.)\1/, 0] #=> "ell"
|
|
* a[/[aeiou](.)\1/, 1] #=> "l"
|
|
* a[/[aeiou](.)\1/, 2] #=> nil
|
|
* a["lo"] #=> "lo"
|
|
* a["bye"] #=> nil
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_aref_m(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
if (argc == 2) {
|
|
if (TYPE(argv[0]) == T_REGEXP) {
|
|
return rb_str_subpat(str, argv[0], NUM2INT(argv[1]));
|
|
}
|
|
return rb_str_substr(str, NUM2LONG(argv[0]), NUM2LONG(argv[1]));
|
|
}
|
|
if (argc != 1) {
|
|
rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc);
|
|
}
|
|
return rb_str_aref(str, argv[0]);
|
|
}
|
|
|
|
static void
|
|
rb_str_splice_0(VALUE str, long beg, long len, VALUE val)
|
|
{
|
|
rb_str_modify(str);
|
|
if (len < RSTRING_LEN(val)) {
|
|
/* expand string */
|
|
RESIZE_CAPA(str, RSTRING_LEN(str) + RSTRING_LEN(val) - len + 1);
|
|
}
|
|
|
|
if (RSTRING_LEN(val) != len) {
|
|
memmove(RSTRING_PTR(str) + beg + RSTRING_LEN(val),
|
|
RSTRING_PTR(str) + beg + len,
|
|
RSTRING_LEN(str) - (beg + len));
|
|
}
|
|
if (RSTRING_LEN(val) < beg && len < 0) {
|
|
MEMZERO(RSTRING_PTR(str) + RSTRING_LEN(str), char, -len);
|
|
}
|
|
if (RSTRING_LEN(val) > 0) {
|
|
memmove(RSTRING_PTR(str)+beg, RSTRING_PTR(val), RSTRING_LEN(val));
|
|
}
|
|
STR_SET_LEN(str, RSTRING_LEN(str) + RSTRING_LEN(val) - len);
|
|
if (RSTRING_PTR(str)) {
|
|
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
|
|
}
|
|
OBJ_INFECT(str, val);
|
|
}
|
|
|
|
static void
|
|
rb_str_splice(VALUE str, long beg, long len, VALUE val)
|
|
{
|
|
long slen;
|
|
char *p, *e;
|
|
rb_encoding *enc;
|
|
int asc = IS_7BIT(str);
|
|
|
|
if (len < 0) rb_raise(rb_eIndexError, "negative length %ld", len);
|
|
|
|
StringValue(val);
|
|
rb_str_modify(str);
|
|
enc = rb_enc_check(str, val);
|
|
slen = str_strlen(str, enc);
|
|
|
|
if (slen < beg) {
|
|
out_of_range:
|
|
rb_raise(rb_eIndexError, "index %ld out of string", beg);
|
|
}
|
|
if (beg < 0) {
|
|
if (-beg > slen) {
|
|
goto out_of_range;
|
|
}
|
|
beg += slen;
|
|
}
|
|
if (slen < len || slen < beg + len) {
|
|
len = slen - beg;
|
|
}
|
|
p = str_nth(RSTRING_PTR(str), RSTRING_END(str), beg, enc, asc);
|
|
if (!p) p = RSTRING_END(str);
|
|
e = str_nth(p, RSTRING_END(str), len, enc, asc);
|
|
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);
|
|
}
|
|
|
|
void
|
|
rb_str_update(VALUE str, long beg, long len, VALUE val)
|
|
{
|
|
rb_str_splice(str, beg, len, val);
|
|
}
|
|
|
|
static void
|
|
rb_str_subpat_set(VALUE str, VALUE re, int nth, VALUE val)
|
|
{
|
|
VALUE match;
|
|
long start, end, len;
|
|
rb_encoding *enc;
|
|
|
|
if (rb_reg_search(re, str, 0, 0) < 0) {
|
|
rb_raise(rb_eIndexError, "regexp not matched");
|
|
}
|
|
match = rb_backref_get();
|
|
if (nth >= RMATCH(match)->regs->num_regs) {
|
|
out_of_range:
|
|
rb_raise(rb_eIndexError, "index %d out of regexp", nth);
|
|
}
|
|
if (nth < 0) {
|
|
if (-nth >= RMATCH(match)->regs->num_regs) {
|
|
goto out_of_range;
|
|
}
|
|
nth += RMATCH(match)->regs->num_regs;
|
|
}
|
|
|
|
start = RMATCH(match)->BEG(nth);
|
|
if (start == -1) {
|
|
rb_raise(rb_eIndexError, "regexp group %d not matched", nth);
|
|
}
|
|
end = RMATCH(match)->END(nth);
|
|
len = end - start;
|
|
StringValue(val);
|
|
enc = rb_enc_check(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_FIXNUM:
|
|
idx = FIX2LONG(indx);
|
|
num_index:
|
|
rb_str_splice(str, idx, 1, val);
|
|
return val;
|
|
|
|
case T_REGEXP:
|
|
rb_str_subpat_set(str, indx, 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, 0), val);
|
|
return val;
|
|
|
|
default:
|
|
/* check if indx is Range */
|
|
{
|
|
long beg, len;
|
|
if (rb_range_beg_len(indx, &beg, &len, str_strlen(str, 0), 2)) {
|
|
rb_str_splice(str, beg, len, val);
|
|
return val;
|
|
}
|
|
}
|
|
idx = NUM2LONG(indx);
|
|
goto num_index;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str[fixnum] = new_str
|
|
* str[fixnum, fixnum] = new_str
|
|
* str[range] = aString
|
|
* str[regexp] = new_str
|
|
* str[regexp, fixnum] = 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
|
|
* <code>String#[]</code>. 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, <code>IndexError</code> is raised. If the regular expression
|
|
* form is used, the optional second <code>Fixnum</code> allows you to specify
|
|
* which portion of the match to replace (effectively using the
|
|
* <code>MatchData</code> indexing rules. The forms that take a
|
|
* <code>Fixnum</code> will raise an <code>IndexError</code> if the value is
|
|
* out of range; the <code>Range</code> form will raise a
|
|
* <code>RangeError</code>, and the <code>Regexp</code> and <code>String</code>
|
|
* forms will silently ignore the assignment.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_aset_m(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
if (argc == 3) {
|
|
if (TYPE(argv[0]) == T_REGEXP) {
|
|
rb_str_subpat_set(str, argv[0], NUM2INT(argv[1]), argv[2]);
|
|
}
|
|
else {
|
|
rb_str_splice(str, NUM2LONG(argv[0]), NUM2LONG(argv[1]), argv[2]);
|
|
}
|
|
return argv[2];
|
|
}
|
|
if (argc != 2) {
|
|
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2)", argc);
|
|
}
|
|
return rb_str_aset(str, argv[0], argv[1]);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.insert(index, other_str) => str
|
|
*
|
|
* Inserts <i>other_str</i> before the character at the given
|
|
* <i>index</i>, modifying <i>str</i>. Negative indices count from the
|
|
* end of the string, and insert <em>after</em> the given character.
|
|
* The intent is insert <i>aString</i> so that it starts at the given
|
|
* <i>index</i>.
|
|
*
|
|
* "abcd".insert(0, 'X') #=> "Xabcd"
|
|
* "abcd".insert(3, 'X') #=> "abcXd"
|
|
* "abcd".insert(4, 'X') #=> "abcdX"
|
|
* "abcd".insert(-3, 'X') #=> "abXcd"
|
|
* "abcd".insert(-1, 'X') #=> "abcdX"
|
|
*/
|
|
|
|
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:
|
|
* str.slice!(fixnum) => fixnum or nil
|
|
* str.slice!(fixnum, fixnum) => new_str or nil
|
|
* str.slice!(range) => new_str or nil
|
|
* str.slice!(regexp) => new_str or nil
|
|
* str.slice!(other_str) => new_str or nil
|
|
*
|
|
* Deletes the specified portion from <i>str</i>, and returns the portion
|
|
* deleted.
|
|
*
|
|
* string = "this is a string"
|
|
* string.slice!(2) #=> 105
|
|
* 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;
|
|
VALUE buf[3];
|
|
int i;
|
|
|
|
if (argc < 1 || 2 < argc) {
|
|
rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc);
|
|
}
|
|
for (i=0; i<argc; i++) {
|
|
buf[i] = argv[i];
|
|
}
|
|
rb_str_modify(str);
|
|
buf[i] = rb_str_new(0,0);
|
|
result = rb_str_aref_m(argc, buf, str);
|
|
if (!NIL_P(result)) {
|
|
rb_str_aset_m(argc+1, buf, str);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static VALUE
|
|
get_pat(VALUE pat, int quote)
|
|
{
|
|
VALUE val;
|
|
|
|
switch (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 (quote) {
|
|
pat = rb_reg_quote(pat);
|
|
}
|
|
|
|
return rb_reg_regcomp(pat);
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.sub!(pattern, replacement) => str or nil
|
|
* str.sub!(pattern) {|match| block } => str or nil
|
|
*
|
|
* Performs the substitutions of <code>String#sub</code> in place,
|
|
* returning <i>str</i>, or <code>nil</code> if no substitutions were
|
|
* performed.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_sub_bang(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
VALUE pat, repl, match;
|
|
struct re_registers *regs;
|
|
int iter = 0;
|
|
int tainted = 0;
|
|
long plen;
|
|
|
|
if (argc == 1 && rb_block_given_p()) {
|
|
iter = 1;
|
|
}
|
|
else if (argc == 2) {
|
|
repl = argv[1];
|
|
StringValue(repl);
|
|
if (OBJ_TAINTED(repl)) tainted = 1;
|
|
}
|
|
else {
|
|
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2)", argc);
|
|
}
|
|
|
|
pat = get_pat(argv[0], 1);
|
|
if (rb_reg_search(pat, str, 0, 0) >= 0) {
|
|
rb_encoding *enc;
|
|
|
|
match = rb_backref_get();
|
|
regs = RMATCH(match)->regs;
|
|
|
|
if (iter) {
|
|
char *p = RSTRING_PTR(str); long len = RSTRING_LEN(str);
|
|
|
|
rb_match_busy(match);
|
|
repl = rb_obj_as_string(rb_yield(rb_reg_nth_match(0, match)));
|
|
enc = rb_enc_check(str, repl);
|
|
str_mod_check(str, p, len);
|
|
str_frozen_check(str);
|
|
rb_backref_set(match);
|
|
}
|
|
else {
|
|
repl = rb_reg_regsub(repl, str, regs, pat);
|
|
enc = rb_enc_check(str, repl);
|
|
}
|
|
rb_str_modify(str);
|
|
rb_enc_associate(str, enc);
|
|
if (OBJ_TAINTED(repl)) tainted = 1;
|
|
plen = END(0) - BEG(0);
|
|
if (RSTRING_LEN(repl) > plen) {
|
|
RESIZE_CAPA(str, RSTRING_LEN(str) + RSTRING_LEN(repl) - plen);
|
|
}
|
|
if (RSTRING_LEN(repl) != plen) {
|
|
memmove(RSTRING_PTR(str) + BEG(0) + RSTRING_LEN(repl),
|
|
RSTRING_PTR(str) + BEG(0) + plen,
|
|
RSTRING_LEN(str) - BEG(0) - plen);
|
|
}
|
|
memcpy(RSTRING_PTR(str) + BEG(0),
|
|
RSTRING_PTR(repl), RSTRING_LEN(repl));
|
|
STR_SET_LEN(str, RSTRING_LEN(str) + RSTRING_LEN(repl) - plen);
|
|
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
|
|
if (tainted) OBJ_TAINT(str);
|
|
|
|
return str;
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.sub(pattern, replacement) => new_str
|
|
* str.sub(pattern) {|match| block } => new_str
|
|
*
|
|
* Returns a copy of <i>str</i> with the <em>first</em> occurrence of
|
|
* <i>pattern</i> replaced with either <i>replacement</i> or the value of the
|
|
* block. The <i>pattern</i> will typically be a <code>Regexp</code>; if it is
|
|
* a <code>String</code> then no regular expression metacharacters will be
|
|
* interpreted (that is <code>/\d/</code> will match a digit, but
|
|
* <code>'\d'</code> will match a backslash followed by a 'd').
|
|
*
|
|
* If the method call specifies <i>replacement</i>, special variables such as
|
|
* <code>$&</code> will not be useful, as substitution into the string occurs
|
|
* before the pattern match starts. However, the sequences <code>\1</code>,
|
|
* <code>\2</code>, <code>\k<group_name></code>, etc., may be used.
|
|
*
|
|
* In the block form, the current match string is passed in as a parameter, and
|
|
* variables such as <code>$1</code>, <code>$2</code>, <code>$`</code>,
|
|
* <code>$&</code>, and <code>$'</code> will be set appropriately. The value
|
|
* returned by the block will be substituted for the match on each call.
|
|
*
|
|
* The result inherits any tainting in the original string or any supplied
|
|
* replacement string.
|
|
*
|
|
* "hello".sub(/[aeiou]/, '*') #=> "h*llo"
|
|
* "hello".sub(/([aeiou])/, '<\1>') #=> "h<e>llo"
|
|
* "hello".sub(/./) {|s| s[0].to_s + ' ' } #=> "104 ello"
|
|
* "hello".sub(/(?<foo>[aeiou])/, '*\k<foo>*') #=> "h*e*llo"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_sub(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
str = rb_str_dup(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, repl, match, dest;
|
|
struct re_registers *regs;
|
|
long beg, n;
|
|
long offset, blen, slen, len;
|
|
int iter = 0;
|
|
char *buf, *bp, *sp, *cp;
|
|
int tainted = 0;
|
|
rb_encoding *enc;
|
|
|
|
switch (argc) {
|
|
case 1:
|
|
RETURN_ENUMERATOR(str, argc, argv);
|
|
iter = 1;
|
|
break;
|
|
case 2:
|
|
repl = argv[1];
|
|
StringValue(repl);
|
|
if (OBJ_TAINTED(repl)) tainted = 1;
|
|
break;
|
|
default:
|
|
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2)", argc);
|
|
}
|
|
|
|
pat = get_pat(argv[0], 1);
|
|
enc = rb_enc_get(pat);
|
|
offset=0; n=0;
|
|
beg = rb_reg_search(pat, str, 0, 0);
|
|
if (beg < 0) {
|
|
if (bang) return Qnil; /* no match, no substitution */
|
|
return rb_str_dup(str);
|
|
}
|
|
|
|
blen = RSTRING_LEN(str) + 30; /* len + margin */
|
|
dest = str_new(0, 0, blen);
|
|
buf = RSTRING_PTR(dest);
|
|
bp = buf;
|
|
sp = cp = RSTRING_PTR(str);
|
|
slen = RSTRING_LEN(str);
|
|
|
|
rb_str_locktmp(dest);
|
|
do {
|
|
rb_encoding *enc;
|
|
|
|
n++;
|
|
match = rb_backref_get();
|
|
regs = RMATCH(match)->regs;
|
|
if (iter) {
|
|
|
|
rb_match_busy(match);
|
|
val = rb_obj_as_string(rb_yield(rb_reg_nth_match(0, match)));
|
|
enc = rb_enc_check(str, val);
|
|
str_mod_check(str, sp, slen);
|
|
if (bang) str_frozen_check(str);
|
|
if (val == dest) { /* paranoid chack [ruby-dev:24827] */
|
|
rb_raise(rb_eRuntimeError, "block should not cheat");
|
|
}
|
|
rb_backref_set(match);
|
|
}
|
|
else {
|
|
val = rb_reg_regsub(repl, str, regs, pat);
|
|
enc = rb_enc_check(str, val);
|
|
}
|
|
rb_enc_associate(str, enc);
|
|
if (OBJ_TAINTED(val)) tainted = 1;
|
|
len = (bp - buf) + (beg - offset) + RSTRING_LEN(val) + 3;
|
|
if (blen < len) {
|
|
while (blen < len) blen *= 2;
|
|
len = bp - buf;
|
|
RESIZE_CAPA(dest, blen);
|
|
STR_SET_LEN(dest, blen);
|
|
buf = RSTRING_PTR(dest);
|
|
bp = buf + len;
|
|
}
|
|
len = beg - offset; /* copy pre-match substr */
|
|
memcpy(bp, cp, len);
|
|
bp += len;
|
|
memcpy(bp, RSTRING_PTR(val), RSTRING_LEN(val));
|
|
bp += RSTRING_LEN(val);
|
|
offset = END(0);
|
|
if (BEG(0) == END(0)) {
|
|
/*
|
|
* Always consume at least one character of the input string
|
|
* in order to prevent infinite loops.
|
|
*/
|
|
if (RSTRING_LEN(str) <= END(0)) break;
|
|
len = rb_enc_mbclen(RSTRING_PTR(str)+END(0), RSTRING_END(str), enc);
|
|
memcpy(bp, RSTRING_PTR(str)+END(0), len);
|
|
bp += len;
|
|
offset = END(0) + len;
|
|
}
|
|
cp = RSTRING_PTR(str) + offset;
|
|
if (offset > RSTRING_LEN(str)) break;
|
|
beg = rb_reg_search(pat, str, offset, 0);
|
|
} while (beg >= 0);
|
|
if (RSTRING_LEN(str) > offset) {
|
|
len = bp - buf;
|
|
if (blen - len < RSTRING_LEN(str) - offset) {
|
|
blen = len + RSTRING_LEN(str) - offset;
|
|
RESIZE_CAPA(dest, blen);
|
|
buf = RSTRING_PTR(dest);
|
|
bp = buf + len;
|
|
}
|
|
memcpy(bp, cp, RSTRING_LEN(str) - offset);
|
|
bp += RSTRING_LEN(str) - offset;
|
|
}
|
|
rb_backref_set(match);
|
|
*bp = '\0';
|
|
rb_str_unlocktmp(dest);
|
|
if (bang) {
|
|
if (str_independent(str) && !STR_EMBED_P(str)) {
|
|
free(RSTRING_PTR(str));
|
|
}
|
|
STR_SET_NOEMBED(str);
|
|
STR_UNSET_NOCAPA(str);
|
|
RSTRING(str)->as.heap.ptr = buf;
|
|
RSTRING(str)->as.heap.aux.capa = blen;
|
|
RSTRING(dest)->as.heap.ptr = 0;
|
|
RSTRING(dest)->as.heap.len = 0;
|
|
}
|
|
else {
|
|
RBASIC(dest)->klass = rb_obj_class(str);
|
|
OBJ_INFECT(dest, str);
|
|
rb_enc_copy(dest, str);
|
|
str = dest;
|
|
}
|
|
STR_SET_LEN(str, bp - buf);
|
|
|
|
if (tainted) OBJ_TAINT(str);
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.gsub!(pattern, replacement) => str or nil
|
|
* str.gsub!(pattern) {|match| block } => str or nil
|
|
*
|
|
* Performs the substitutions of <code>String#gsub</code> in place, returning
|
|
* <i>str</i>, or <code>nil</code> if no substitutions were performed.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_gsub_bang(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
return str_gsub(argc, argv, str, 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.gsub(pattern, replacement) => new_str
|
|
* str.gsub(pattern) {|match| block } => new_str
|
|
*
|
|
* Returns a copy of <i>str</i> with <em>all</em> occurrences of <i>pattern</i>
|
|
* replaced with either <i>replacement</i> or the value of the block. The
|
|
* <i>pattern</i> will typically be a <code>Regexp</code>; if it is a
|
|
* <code>String</code> then no regular expression metacharacters will be
|
|
* interpreted (that is <code>/\d/</code> will match a digit, but
|
|
* <code>'\d'</code> will match a backslash followed by a 'd').
|
|
*
|
|
* If a string is used as the replacement, special variables from the match
|
|
* (such as <code>$&</code> and <code>$1</code>) cannot be substituted into it,
|
|
* as substitution into the string occurs before the pattern match
|
|
* starts. However, the sequences <code>\1</code>, <code>\2</code>,
|
|
* <code>\k<group_name></code>, and so on may be used to interpolate
|
|
* successive groups in the match.
|
|
*
|
|
* In the block form, the current match string is passed in as a parameter, and
|
|
* variables such as <code>$1</code>, <code>$2</code>, <code>$`</code>,
|
|
* <code>$&</code>, and <code>$'</code> will be set appropriately. The value
|
|
* returned by the block will be substituted for the match on each call.
|
|
*
|
|
* The result inherits any tainting in the original string or any supplied
|
|
* replacement string.
|
|
*
|
|
* "hello".gsub(/[aeiou]/, '*') #=> "h*ll*"
|
|
* "hello".gsub(/([aeiou])/, '<\1>') #=> "h<e>ll<o>"
|
|
* "hello".gsub(/./) {|s| s[0].to_s + ' '} #=> "104 101 108 108 111 "
|
|
* "hello".gsub(/(?<foo>[aeiou])/, '{\k<foo>}') #=> "h{e}ll{o}"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_gsub(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
return str_gsub(argc, argv, str, 0);
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.replace(other_str) => str
|
|
*
|
|
* Replaces the contents and taintedness of <i>str</i> with the corresponding
|
|
* values in <i>other_str</i>.
|
|
*
|
|
* s = "hello" #=> "hello"
|
|
* s.replace "world" #=> "world"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_replace(VALUE str, VALUE str2)
|
|
{
|
|
long len;
|
|
if (str == str2) return str;
|
|
|
|
StringValue(str2);
|
|
len = RSTRING_LEN(str2);
|
|
if (STR_SHARED_P(str2)) {
|
|
if (str_independent(str) && !STR_EMBED_P(str)) {
|
|
free(RSTRING_PTR(str));
|
|
}
|
|
STR_SET_NOEMBED(str);
|
|
RSTRING(str)->as.heap.len = len;
|
|
RSTRING(str)->as.heap.ptr = RSTRING_PTR(str2);
|
|
FL_SET(str, ELTS_SHARED);
|
|
FL_UNSET(str, STR_ASSOC);
|
|
RSTRING(str)->as.heap.aux.shared = RSTRING(str2)->as.heap.aux.shared;
|
|
}
|
|
else if (STR_ASSOC_P(str2)) {
|
|
rb_str_modify(str);
|
|
STR_SET_NOEMBED(str);
|
|
RSTRING(str)->as.heap.ptr = ALLOC_N(char,len+1);
|
|
memcpy(RSTRING_PTR(str), RSTRING_PTR(str2), len+1);
|
|
FL_SET(str, STR_ASSOC);
|
|
RSTRING(str)->as.heap.aux.shared = RSTRING(str2)->as.heap.aux.shared;
|
|
}
|
|
else {
|
|
rb_str_modify(str);
|
|
rb_str_resize(str, len);
|
|
memcpy(RSTRING_PTR(str), RSTRING_PTR(str2), len+1);
|
|
}
|
|
|
|
OBJ_INFECT(str, str2);
|
|
rb_enc_copy(str, str2);
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* string.clear -> string
|
|
*
|
|
* Makes string empty.
|
|
*
|
|
* a = "abcde"
|
|
* a.clear #=> ""
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_clear(VALUE str)
|
|
{
|
|
/* rb_str_modify() */ /* no need for str_make_independent */
|
|
if (str_independent(str) && !STR_EMBED_P(str)) {
|
|
free(RSTRING_PTR(str));
|
|
}
|
|
STR_SET_EMBED(str);
|
|
STR_SET_EMBED_LEN(str, 0);
|
|
RSTRING_PTR(str)[0] = 0;
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* string.chr -> string
|
|
*
|
|
* Returns a one-character string at the beginning of the string.
|
|
*
|
|
* a = "abcde"
|
|
* a.chr #=> "a"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_chr(VALUE str)
|
|
{
|
|
return rb_str_substr(str, 0, 1);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.reverse => new_str
|
|
*
|
|
* Returns a new string with the characters from <i>str</i> in reverse order.
|
|
*
|
|
* "stressed".reverse #=> "desserts"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_reverse(VALUE str)
|
|
{
|
|
rb_encoding *enc;
|
|
VALUE obj;
|
|
char *s, *e, *p;
|
|
|
|
if (RSTRING_LEN(str) <= 1) return rb_str_dup(str);
|
|
enc = rb_enc_get(str);
|
|
obj = rb_str_new5(str, 0, RSTRING_LEN(str));
|
|
s = RSTRING_PTR(str); e = RSTRING_END(str);
|
|
p = RSTRING_END(obj);
|
|
|
|
if (RSTRING_LEN(str) > 1) {
|
|
if (rb_enc_mbmaxlen(enc) == 1) {
|
|
while (s < e) {
|
|
*--p = *s++;
|
|
}
|
|
}
|
|
else {
|
|
while (s < e) {
|
|
int clen = rb_enc_mbclen(s, e, enc);
|
|
|
|
p -= clen;
|
|
memcpy(p, s, clen);
|
|
s += clen;
|
|
}
|
|
}
|
|
}
|
|
STR_SET_LEN(obj, RSTRING_LEN(str));
|
|
OBJ_INFECT(obj, str);
|
|
rb_enc_associate(obj, enc);
|
|
|
|
return obj;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.reverse! => str
|
|
*
|
|
* Reverses <i>str</i> in place.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_reverse_bang(VALUE str)
|
|
{
|
|
rb_encoding *enc = rb_enc_get(str);
|
|
char *s, *e, c;
|
|
|
|
if (RSTRING_LEN(str) > 1) {
|
|
rb_str_modify(str);
|
|
s = RSTRING_PTR(str);
|
|
e = RSTRING_END(str) - 1;
|
|
|
|
if (rb_enc_mbmaxlen(enc) == 1) {
|
|
while (s < e) {
|
|
c = *s;
|
|
*s++ = *e;
|
|
*e-- = c;
|
|
}
|
|
}
|
|
else {
|
|
rb_str_shared_replace(str, rb_str_reverse(str));
|
|
}
|
|
}
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.include? other_str => true or false
|
|
* str.include? fixnum => true or false
|
|
*
|
|
* Returns <code>true</code> if <i>str</i> contains the given string or
|
|
* character.
|
|
*
|
|
* "hello".include? "lo" #=> true
|
|
* "hello".include? "ol" #=> false
|
|
* "hello".include? ?h #=> true
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_include(VALUE str, VALUE arg)
|
|
{
|
|
long i;
|
|
|
|
StringValue(arg);
|
|
i = rb_str_index(str, arg, 0);
|
|
|
|
if (i == -1) return Qfalse;
|
|
return Qtrue;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.to_i(base=10) => integer
|
|
*
|
|
* Returns the result of interpreting leading characters in <i>str</i> as an
|
|
* integer base <i>base</i> (between 2 and 36). Extraneous characters past the
|
|
* end of a valid number are ignored. If there is not a valid number at the
|
|
* start of <i>str</i>, <code>0</code> is returned. This method never raises an
|
|
* exception.
|
|
*
|
|
* "12345".to_i #=> 12345
|
|
* "99 red balloons".to_i #=> 99
|
|
* "0a".to_i #=> 0
|
|
* "0a".to_i(16) #=> 10
|
|
* "hello".to_i #=> 0
|
|
* "1100101".to_i(2) #=> 101
|
|
* "1100101".to_i(8) #=> 294977
|
|
* "1100101".to_i(10) #=> 1100101
|
|
* "1100101".to_i(16) #=> 17826049
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_to_i(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
VALUE b;
|
|
int base;
|
|
|
|
rb_scan_args(argc, argv, "01", &b);
|
|
if (argc == 0) base = 10;
|
|
else base = NUM2INT(b);
|
|
|
|
if (base < 0) {
|
|
rb_raise(rb_eArgError, "invalid radix %d", base);
|
|
}
|
|
return rb_str_to_inum(str, base, Qfalse);
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.to_f => float
|
|
*
|
|
* Returns the result of interpreting leading characters in <i>str</i> as a
|
|
* floating point number. Extraneous characters past the end of a valid number
|
|
* are ignored. If there is not a valid number at the start of <i>str</i>,
|
|
* <code>0.0</code> is returned. This method never raises an exception.
|
|
*
|
|
* "123.45e1".to_f #=> 1234.5
|
|
* "45.67 degrees".to_f #=> 45.67
|
|
* "thx1138".to_f #=> 0.0
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_to_f(VALUE str)
|
|
{
|
|
return DOUBLE2NUM(rb_str_to_dbl(str, Qfalse));
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.to_s => str
|
|
* str.to_str => str
|
|
*
|
|
* Returns the receiver.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_to_s(VALUE str)
|
|
{
|
|
if (rb_obj_class(str) != rb_cString) {
|
|
VALUE dup = str_alloc(rb_cString);
|
|
rb_str_replace(dup, str);
|
|
return dup;
|
|
}
|
|
return str;
|
|
}
|
|
|
|
static void
|
|
str_cat_char(VALUE str, int c, rb_encoding *enc)
|
|
{
|
|
char s[16];
|
|
int n = rb_enc_codelen(c, enc);
|
|
|
|
rb_enc_mbcput(c, s, enc);
|
|
rb_str_buf_cat(str, s, n);
|
|
}
|
|
|
|
static void
|
|
prefix_escape(VALUE str, int c, rb_encoding *enc)
|
|
{
|
|
str_cat_char(str, '\\', enc);
|
|
str_cat_char(str, c, enc);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.inspect => string
|
|
*
|
|
* Returns a printable version of _str_, srrounded by quote marks,
|
|
* with special characters escaped.
|
|
*
|
|
* str = "hello"
|
|
* str[3] = "\b"
|
|
* str.inspect #=> "\"hel\bo\""
|
|
*/
|
|
|
|
VALUE
|
|
rb_str_inspect(VALUE str)
|
|
{
|
|
rb_encoding *enc = rb_enc_get(str);
|
|
char *p, *pend;
|
|
VALUE result = rb_str_buf_new2("");
|
|
|
|
rb_enc_associate(result, enc);
|
|
str_cat_char(result, '"', enc);
|
|
p = RSTRING_PTR(str); pend = RSTRING_END(str);
|
|
while (p < pend) {
|
|
int c;
|
|
int n;
|
|
int cc;
|
|
|
|
n = rb_enc_precise_mbclen(p, pend, enc);
|
|
if (!MBCLEN_CHARFOUND(n)) {
|
|
p++;
|
|
n = 1;
|
|
goto escape_codepoint;
|
|
}
|
|
|
|
c = rb_enc_codepoint(p, pend, enc);
|
|
n = rb_enc_codelen(c, enc);
|
|
|
|
p += n;
|
|
if (c == '"'|| c == '\\' ||
|
|
(c == '#' && (cc = rb_enc_codepoint(p,pend,enc),
|
|
(cc == '$' || cc == '@' || cc == '{')))) {
|
|
prefix_escape(result, c, enc);
|
|
}
|
|
else if (c == '\n') {
|
|
prefix_escape(result, 'n', enc);
|
|
}
|
|
else if (c == '\r') {
|
|
prefix_escape(result, 'r', enc);
|
|
}
|
|
else if (c == '\t') {
|
|
prefix_escape(result, 't', enc);
|
|
}
|
|
else if (c == '\f') {
|
|
prefix_escape(result, 'f', enc);
|
|
}
|
|
else if (c == '\013') {
|
|
prefix_escape(result, 'v', enc);
|
|
}
|
|
else if (c == '\010') {
|
|
prefix_escape(result, 'b', enc);
|
|
}
|
|
else if (c == '\007') {
|
|
prefix_escape(result, 'a', enc);
|
|
}
|
|
else if (c == 033) {
|
|
prefix_escape(result, 'e', enc);
|
|
}
|
|
else if (rb_enc_isprint(c, enc)) {
|
|
rb_str_buf_cat(result, p-n, n);
|
|
}
|
|
else {
|
|
char buf[5];
|
|
char *s;
|
|
char *q;
|
|
|
|
escape_codepoint:
|
|
for (q = p-n; q < p; q++) {
|
|
s = buf;
|
|
sprintf(buf, "\\x%02X", *q & 0377);
|
|
while (*s) {
|
|
str_cat_char(result, *s++, enc);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
str_cat_char(result, '"', enc);
|
|
|
|
OBJ_INFECT(result, str);
|
|
return result;
|
|
}
|
|
|
|
#define IS_EVSTR(p,e) ((p) < (e) && (*(p) == '$' || *(p) == '@' || *(p) == '{'))
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.dump => new_str
|
|
*
|
|
* Produces a version of <i>str</i> with all nonprinting characters replaced by
|
|
* <code>\nnn</code> notation and all special characters escaped.
|
|
*/
|
|
|
|
VALUE
|
|
rb_str_dump(VALUE str)
|
|
{
|
|
rb_encoding *enc = rb_enc_from_index(0);
|
|
long len;
|
|
char *p, *pend;
|
|
char *q, *qend;
|
|
VALUE result;
|
|
|
|
len = 2; /* "" */
|
|
p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str);
|
|
while (p < pend) {
|
|
char c = *p++;
|
|
switch (c) {
|
|
case '"': case '\\':
|
|
case '\n': case '\r':
|
|
case '\t': case '\f':
|
|
case '\013': case '\010': case '\007': case '\033':
|
|
len += 2;
|
|
break;
|
|
|
|
case '#':
|
|
len += IS_EVSTR(p, pend) ? 2 : 1;
|
|
break;
|
|
|
|
default:
|
|
if (rb_enc_isprint(c, enc)) {
|
|
len++;
|
|
}
|
|
else {
|
|
len += 4; /* \nnn */
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
result = rb_str_new5(str, 0, len);
|
|
p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str);
|
|
q = RSTRING_PTR(result); qend = q + len;
|
|
|
|
*q++ = '"';
|
|
while (p < pend) {
|
|
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 (rb_enc_isprint(c, enc)) {
|
|
*q++ = c;
|
|
}
|
|
else {
|
|
*q++ = '\\';
|
|
sprintf(q, "x%02X", c&0xff);
|
|
q += 3;
|
|
}
|
|
}
|
|
*q++ = '"';
|
|
|
|
OBJ_INFECT(result, str);
|
|
/* result from dump is ASCII */
|
|
rb_enc_associate(result, enc);
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.upcase! => str or nil
|
|
*
|
|
* Upcases the contents of <i>str</i>, returning <code>nil</code> if no changes
|
|
* were made.
|
|
* Note: case replacement is effective only in ASCII region.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_upcase_bang(VALUE str)
|
|
{
|
|
rb_encoding *enc;
|
|
char *s, *send;
|
|
int modify = 0;
|
|
|
|
rb_str_modify(str);
|
|
enc = rb_enc_get(str);
|
|
s = RSTRING_PTR(str); send = RSTRING_END(str);
|
|
while (s < send) {
|
|
int c = rb_enc_codepoint(s, send, enc);
|
|
|
|
if (rb_enc_islower(c, enc)) {
|
|
/* assuming toupper returns codepoint with same size */
|
|
rb_enc_mbcput(rb_enc_toupper(c, enc), s, enc);
|
|
modify = 1;
|
|
}
|
|
s += rb_enc_codelen(c, enc);
|
|
}
|
|
|
|
if (modify) return str;
|
|
return Qnil;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.upcase => new_str
|
|
*
|
|
* Returns a copy of <i>str</i> with all lowercase letters replaced with their
|
|
* uppercase counterparts. The operation is locale insensitive---only
|
|
* characters ``a'' to ``z'' are affected.
|
|
* Note: case replacement is effective only in ASCII region.
|
|
*
|
|
* "hEllO".upcase #=> "HELLO"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_upcase(VALUE str)
|
|
{
|
|
str = rb_str_dup(str);
|
|
rb_str_upcase_bang(str);
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.downcase! => str or nil
|
|
*
|
|
* Downcases the contents of <i>str</i>, returning <code>nil</code> if no
|
|
* changes were made.
|
|
* Note: case replacement is effective only in ASCII region.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_downcase_bang(VALUE str)
|
|
{
|
|
rb_encoding *enc;
|
|
char *s, *send;
|
|
int modify = 0;
|
|
|
|
rb_str_modify(str);
|
|
enc = rb_enc_get(str);
|
|
s = RSTRING_PTR(str); send = RSTRING_END(str);
|
|
while (s < send) {
|
|
int c = rb_enc_codepoint(s, send, enc);
|
|
|
|
if (rb_enc_isupper(c, enc)) {
|
|
/* assuming toupper returns codepoint with same size */
|
|
rb_enc_mbcput(rb_enc_tolower(c, enc), s, enc);
|
|
modify = 1;
|
|
}
|
|
s += rb_enc_codelen(c, enc);
|
|
}
|
|
|
|
if (modify) return str;
|
|
return Qnil;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.downcase => new_str
|
|
*
|
|
* Returns a copy of <i>str</i> with all uppercase letters replaced with their
|
|
* lowercase counterparts. The operation is locale insensitive---only
|
|
* characters ``A'' to ``Z'' are affected.
|
|
* Note: case replacement is effective only in ASCII region.
|
|
*
|
|
* "hEllO".downcase #=> "hello"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_downcase(VALUE str)
|
|
{
|
|
str = rb_str_dup(str);
|
|
rb_str_downcase_bang(str);
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.capitalize! => str or nil
|
|
*
|
|
* Modifies <i>str</i> by converting the first character to uppercase and the
|
|
* remainder to lowercase. Returns <code>nil</code> if no changes are made.
|
|
* Note: case conversion is effective only in ASCII region.
|
|
*
|
|
* a = "hello"
|
|
* a.capitalize! #=> "Hello"
|
|
* a #=> "Hello"
|
|
* a.capitalize! #=> nil
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_capitalize_bang(VALUE str)
|
|
{
|
|
rb_encoding *enc;
|
|
char *s, *send;
|
|
int modify = 0;
|
|
int c;
|
|
|
|
rb_str_modify(str);
|
|
enc = rb_enc_get(str);
|
|
if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return Qnil;
|
|
s = RSTRING_PTR(str); send = RSTRING_END(str);
|
|
|
|
c = rb_enc_codepoint(s, send, enc);
|
|
if (rb_enc_islower(c, enc)) {
|
|
rb_enc_mbcput(rb_enc_toupper(c, enc), s, enc);
|
|
modify = 1;
|
|
}
|
|
s += rb_enc_codelen(c, enc);
|
|
while (s < send) {
|
|
c = rb_enc_codepoint(s, send, enc);
|
|
if (rb_enc_isupper(c, enc)) {
|
|
rb_enc_mbcput(rb_enc_tolower(c, enc), s, enc);
|
|
modify = 1;
|
|
}
|
|
s += rb_enc_codelen(c, enc);
|
|
}
|
|
if (modify) return str;
|
|
return Qnil;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.capitalize => new_str
|
|
*
|
|
* Returns a copy of <i>str</i> with the first character converted to uppercase
|
|
* and the remainder to lowercase.
|
|
* Note: case conversion is effective only in ASCII region.
|
|
*
|
|
* "hello".capitalize #=> "Hello"
|
|
* "HELLO".capitalize #=> "Hello"
|
|
* "123ABC".capitalize #=> "123abc"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_capitalize(VALUE str)
|
|
{
|
|
str = rb_str_dup(str);
|
|
rb_str_capitalize_bang(str);
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.swapcase! => str or nil
|
|
*
|
|
* Equivalent to <code>String#swapcase</code>, but modifies the receiver in
|
|
* place, returning <i>str</i>, or <code>nil</code> if no changes were made.
|
|
* Note: case conversion is effective only in ASCII region.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_swapcase_bang(VALUE str)
|
|
{
|
|
rb_encoding *enc;
|
|
char *s, *send;
|
|
int modify = 0;
|
|
|
|
rb_str_modify(str);
|
|
enc = rb_enc_get(str);
|
|
s = RSTRING_PTR(str); send = RSTRING_END(str);
|
|
while (s < send) {
|
|
int c = rb_enc_codepoint(s, send, enc);
|
|
|
|
if (rb_enc_isupper(c, enc)) {
|
|
/* assuming toupper returns codepoint with same size */
|
|
rb_enc_mbcput(rb_enc_tolower(c, enc), s, enc);
|
|
modify = 1;
|
|
}
|
|
else if (rb_enc_islower(c, enc)) {
|
|
/* assuming toupper returns codepoint with same size */
|
|
rb_enc_mbcput(rb_enc_toupper(c, enc), s, enc);
|
|
modify = 1;
|
|
}
|
|
s += rb_enc_codelen(c, enc);
|
|
}
|
|
|
|
if (modify) return str;
|
|
return Qnil;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.swapcase => new_str
|
|
*
|
|
* Returns a copy of <i>str</i> with uppercase alphabetic characters converted
|
|
* to lowercase and lowercase characters converted to uppercase.
|
|
* Note: case conversion is effective only in ASCII region.
|
|
*
|
|
* "Hello".swapcase #=> "hELLO"
|
|
* "cYbEr_PuNk11".swapcase #=> "CyBeR_pUnK11"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_swapcase(VALUE str)
|
|
{
|
|
str = rb_str_dup(str);
|
|
rb_str_swapcase_bang(str);
|
|
return str;
|
|
}
|
|
|
|
typedef unsigned char *USTR;
|
|
|
|
struct tr {
|
|
int gen, now, max;
|
|
char *p, *pend;
|
|
};
|
|
|
|
static int
|
|
trnext(struct tr *t, rb_encoding *enc)
|
|
{
|
|
for (;;) {
|
|
if (!t->gen) {
|
|
if (t->p == t->pend) return -1;
|
|
t->now = rb_enc_codepoint(t->p, t->pend, enc);
|
|
t->p += rb_enc_codelen(t->now, enc);
|
|
if (t->p < t->pend - 1 && *t->p == '-') {
|
|
t->p++;
|
|
if (t->p < t->pend) {
|
|
int c = rb_enc_codepoint(t->p, t->pend, enc);
|
|
t->p += rb_enc_codelen(c, enc);
|
|
if (t->now > c) continue;
|
|
t->gen = 1;
|
|
t->max = c;
|
|
}
|
|
}
|
|
return t->now;
|
|
}
|
|
else 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)
|
|
{
|
|
SIGNED_VALUE trans[256];
|
|
rb_encoding *enc, *e1, *e2;
|
|
struct tr trsrc, trrepl;
|
|
int cflag = 0;
|
|
int c, last = 0, modify = 0, i;
|
|
char *s, *send;
|
|
VALUE hash = 0;
|
|
|
|
StringValue(src);
|
|
StringValue(repl);
|
|
if (RSTRING_LEN(str) == 0 || !RSTRING_PTR(str)) return Qnil;
|
|
trsrc.p = RSTRING_PTR(src); trsrc.pend = trsrc.p + RSTRING_LEN(src);
|
|
if (RSTRING_LEN(src) >= 2 && RSTRING_PTR(src)[0] == '^') {
|
|
cflag++;
|
|
trsrc.p++;
|
|
}
|
|
if (RSTRING_LEN(repl) == 0) {
|
|
return rb_str_delete_bang(1, &src, 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);
|
|
}
|
|
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)) >= 0) {
|
|
if (c < 256) {
|
|
trans[c] = -1;
|
|
}
|
|
else {
|
|
if (!hash) hash = rb_hash_new();
|
|
rb_hash_aset(hash, INT2NUM(c), Qtrue);
|
|
}
|
|
}
|
|
while ((c = trnext(&trrepl, enc)) >= 0)
|
|
/* retrieve last replacer */;
|
|
last = trrepl.now;
|
|
for (i=0; i<256; i++) {
|
|
if (trans[i] >= 0) {
|
|
trans[i] = last;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
int r;
|
|
|
|
for (i=0; i<256; i++) {
|
|
trans[i] = -1;
|
|
}
|
|
while ((c = trnext(&trsrc, enc)) >= 0) {
|
|
r = trnext(&trrepl, enc);
|
|
if (r == -1) r = trrepl.now;
|
|
if (c < 256) {
|
|
trans[c] = INT2NUM(r);
|
|
}
|
|
else {
|
|
if (!hash) hash = rb_hash_new();
|
|
rb_hash_aset(hash, INT2NUM(c), INT2NUM(r));
|
|
}
|
|
}
|
|
}
|
|
|
|
rb_str_modify(str);
|
|
s = RSTRING_PTR(str); send = RSTRING_END(str);
|
|
if (sflag) {
|
|
int clen, tlen, max = RSTRING_LEN(str);
|
|
int offset, save = -1;
|
|
char *buf = ALLOC_N(char, max), *t = buf;
|
|
VALUE v;
|
|
|
|
if (cflag) tlen = rb_enc_codelen(last, enc);
|
|
while (s < send) {
|
|
c = rb_enc_codepoint(s, send, enc);
|
|
tlen = clen = rb_enc_codelen(c, enc);
|
|
|
|
s += clen;
|
|
if (c < 256) {
|
|
v = trans[c] >= 0 ? trans[c] : Qnil;
|
|
}
|
|
else {
|
|
v = hash ? rb_hash_aref(hash, INT2NUM(c)) : Qnil;
|
|
}
|
|
if (!NIL_P(v)) {
|
|
if (!cflag) {
|
|
c = NUM2INT(v);
|
|
if (save == c) continue;
|
|
save = c;
|
|
tlen = rb_enc_codelen(c, enc);
|
|
modify = 1;
|
|
}
|
|
else {
|
|
save = c = last;
|
|
modify = 1;
|
|
}
|
|
}
|
|
else {
|
|
save = -1;
|
|
}
|
|
while (t - buf + tlen >= max) {
|
|
offset = t - buf;
|
|
max *= 2;
|
|
REALLOC_N(buf, char, max);
|
|
t = buf + offset;
|
|
}
|
|
rb_enc_mbcput(c, t, enc);
|
|
t += tlen;
|
|
}
|
|
*t = '\0';
|
|
RSTRING(str)->as.heap.ptr = 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) {
|
|
while (s < send) {
|
|
c = (unsigned char)*s;
|
|
if (trans[c] >= 0) {
|
|
if (!cflag) {
|
|
c = FIX2INT(trans[c]);
|
|
*s = c;
|
|
modify = 1;
|
|
}
|
|
else {
|
|
*s = last;
|
|
modify = 1;
|
|
}
|
|
}
|
|
s++;
|
|
}
|
|
}
|
|
else {
|
|
int clen, tlen, max = RSTRING_LEN(str) * 1.2;
|
|
int offset;
|
|
char *buf = ALLOC_N(char, max), *t = buf;
|
|
VALUE v;
|
|
|
|
if (cflag) tlen = rb_enc_codelen(last, enc);
|
|
while (s < send) {
|
|
c = rb_enc_codepoint(s, send, enc);
|
|
tlen = clen = rb_enc_codelen(c, enc);
|
|
|
|
if (c < 256) {
|
|
v = trans[c] >= 0 ? trans[c] : Qnil;
|
|
}
|
|
else {
|
|
v = hash ? rb_hash_aref(hash, INT2NUM(c)) : Qnil;
|
|
}
|
|
if (!NIL_P(v)) {
|
|
if (!cflag) {
|
|
c = NUM2INT(v);
|
|
tlen = rb_enc_codelen(c, enc);
|
|
modify = 1;
|
|
}
|
|
else {
|
|
c = last;
|
|
modify = 1;
|
|
}
|
|
}
|
|
while (t - buf + tlen >= max) {
|
|
offset = t - buf;
|
|
max *= 2;
|
|
REALLOC_N(buf, char, max);
|
|
t = buf + offset;
|
|
}
|
|
if (s != t) rb_enc_mbcput(c, t, enc);
|
|
s += clen;
|
|
t += tlen;
|
|
}
|
|
if (!STR_EMBED_P(str)) {
|
|
free(RSTRING(str)->as.heap.ptr);
|
|
}
|
|
*t = '\0';
|
|
RSTRING(str)->as.heap.ptr = buf;
|
|
RSTRING(str)->as.heap.len = t - buf;
|
|
STR_SET_NOEMBED(str);
|
|
RSTRING(str)->as.heap.aux.capa = max;
|
|
}
|
|
|
|
if (modify) {
|
|
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
|
|
* <code>String#tr</code>. 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 <i>str</i> with the characters in <i>from_str</i> replaced
|
|
* by the corresponding characters in <i>to_str</i>. If <i>to_str</i> is
|
|
* shorter than <i>from_str</i>, it is padded with its last character. Both
|
|
* strings may use the c1--c2 notation to denote ranges of characters, and
|
|
* <i>from_str</i> may start with a <code>^</code>, which denotes all
|
|
* characters except those listed.
|
|
*
|
|
* "hello".tr('aeiou', '*') #=> "h*ll*"
|
|
* "hello".tr('^aeiou', '*') #=> "*e**o"
|
|
* "hello".tr('el', 'ip') #=> "hippo"
|
|
* "hello".tr('a-y', 'b-z') #=> "ifmmp"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_tr(VALUE str, VALUE src, VALUE repl)
|
|
{
|
|
str = rb_str_dup(str);
|
|
tr_trans(str, src, repl, 0);
|
|
return str;
|
|
}
|
|
|
|
static void
|
|
tr_setup_table(VALUE str, char stable[256], int first,
|
|
VALUE *tablep, VALUE *ctablep, rb_encoding *enc)
|
|
{
|
|
char buf[256];
|
|
struct tr tr;
|
|
int c;
|
|
VALUE table = 0, ptable = 0;
|
|
int i, 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 && RSTRING_PTR(str)[0] == '^') {
|
|
cflag = 1;
|
|
tr.p++;
|
|
}
|
|
if (first) {
|
|
for (i=0; i<256; i++) {
|
|
stable[i] = 1;
|
|
}
|
|
}
|
|
for (i=0; i<256; i++) {
|
|
buf[i] = cflag;
|
|
}
|
|
|
|
while ((c = trnext(&tr, enc)) >= 0) {
|
|
if (c < 256) {
|
|
buf[c & 0xff] = !cflag;
|
|
}
|
|
else {
|
|
VALUE key = INT2NUM(c);
|
|
|
|
if (!table) {
|
|
table = rb_hash_new();
|
|
if (cflag) {
|
|
ptable = *ctablep;
|
|
*ctablep = table;
|
|
}
|
|
else {
|
|
ptable = *tablep;
|
|
*tablep = table;
|
|
}
|
|
}
|
|
if (!ptable || !NIL_P(rb_hash_aref(ptable, key))) {
|
|
rb_hash_aset(table, key, Qtrue);
|
|
}
|
|
}
|
|
}
|
|
for (i=0; i<256; i++) {
|
|
stable[i] = stable[i] && buf[i];
|
|
}
|
|
}
|
|
|
|
|
|
static int
|
|
tr_find(int c, char table[256], VALUE del, VALUE nodel)
|
|
{
|
|
if (c < 256) {
|
|
return table[c] ? Qtrue : Qfalse;
|
|
}
|
|
else {
|
|
VALUE v = INT2NUM(c);
|
|
|
|
if (!del || NIL_P(rb_hash_lookup(del, v))) {
|
|
return Qfalse;
|
|
}
|
|
if (nodel && NIL_P(rb_hash_lookup(nodel, v)))
|
|
return Qfalse;
|
|
return Qtrue;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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[256];
|
|
rb_encoding *enc = 0;
|
|
char *s, *send, *t;
|
|
VALUE del = 0, nodel = 0;
|
|
int modify = 0;
|
|
int i;
|
|
|
|
if (argc < 1) {
|
|
rb_raise(rb_eArgError, "wrong number of 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);
|
|
}
|
|
|
|
rb_str_modify(str);
|
|
s = t = RSTRING_PTR(str);
|
|
if (!s || RSTRING_LEN(str) == 0) return Qnil;
|
|
send = RSTRING_END(str);
|
|
while (s < send) {
|
|
int c = rb_enc_codepoint(s, send, enc);
|
|
int clen = rb_enc_codelen(c, enc);
|
|
|
|
if (tr_find(c, squeez, del, nodel)) {
|
|
modify = 1;
|
|
}
|
|
else {
|
|
if (t != s) rb_enc_mbcput(c, t, enc);
|
|
t += clen;
|
|
}
|
|
s += clen;
|
|
}
|
|
*t = '\0';
|
|
STR_SET_LEN(str, t - RSTRING_PTR(str));
|
|
|
|
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
|
|
* <code>String#count</code>.
|
|
*
|
|
* "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 = rb_str_dup(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[256];
|
|
rb_encoding *enc = 0;
|
|
VALUE del = 0, nodel = 0;
|
|
char *s, *send, *t;
|
|
int save, modify = 0;
|
|
int i;
|
|
|
|
if (argc == 0) {
|
|
enc = rb_enc_get(str);
|
|
}
|
|
else {
|
|
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);
|
|
}
|
|
}
|
|
|
|
rb_str_modify(str);
|
|
s = t = RSTRING_PTR(str);
|
|
if (!s || RSTRING_LEN(str) == 0) return Qnil;
|
|
send = RSTRING_END(str);
|
|
save = -1;
|
|
while (s < send) {
|
|
int c = rb_enc_codepoint(s, send, enc);
|
|
int clen = rb_enc_codelen(c, 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;
|
|
}
|
|
*t = '\0';
|
|
if (t - RSTRING_PTR(str) != RSTRING_LEN(str)) {
|
|
STR_SET_LEN(str, 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 <code>String#count</code>. 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 = rb_str_dup(str);
|
|
rb_str_squeeze_bang(argc, argv, str);
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.tr_s!(from_str, to_str) => str or nil
|
|
*
|
|
* Performs <code>String#tr_s</code> 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 <code>String#tr</code>,
|
|
* 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 = rb_str_dup(str);
|
|
tr_trans(str, src, repl, 1);
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.count([other_str]+) => fixnum
|
|
*
|
|
* Each <i>other_str</i> parameter defines a set of characters to count. The
|
|
* intersection of these sets defines the characters to count in
|
|
* <i>str</i>. Any <i>other_str</i> that starts with a caret (^) is
|
|
* negated. The sequence c1--c2 means all characters between c1 and c2.
|
|
*
|
|
* a = "hello world"
|
|
* a.count "lo" #=> 5
|
|
* a.count "lo", "o" #=> 2
|
|
* a.count "hello", "^l" #=> 4
|
|
* a.count "ej-m" #=> 4
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_count(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
char table[256];
|
|
rb_encoding *enc = 0;
|
|
VALUE del = 0, nodel = 0;
|
|
char *s, *send;
|
|
int i;
|
|
|
|
if (argc < 1) {
|
|
rb_raise(rb_eArgError, "wrong number of arguments");
|
|
}
|
|
for (i=0; i<argc; i++) {
|
|
VALUE s = argv[i];
|
|
|
|
StringValue(s);
|
|
enc = rb_enc_check(str, s);
|
|
tr_setup_table(s, table,i==0, &del, &nodel, enc);
|
|
}
|
|
|
|
s = RSTRING_PTR(str);
|
|
if (!s || RSTRING_LEN(str) == 0) return INT2FIX(0);
|
|
send = RSTRING_END(str);
|
|
i = 0;
|
|
while (s < send) {
|
|
int c = rb_enc_codepoint(s, send, enc);
|
|
int clen = rb_enc_codelen(c, enc);
|
|
|
|
if (tr_find(c, table, del, nodel)) {
|
|
i++;
|
|
}
|
|
s += clen;
|
|
}
|
|
return INT2NUM(i);
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.split(pattern=$;, [limit]) => anArray
|
|
*
|
|
* Divides <i>str</i> into substrings based on a delimiter, returning an array
|
|
* of these substrings.
|
|
*
|
|
* If <i>pattern</i> is a <code>String</code>, then its contents are used as
|
|
* the delimiter when splitting <i>str</i>. If <i>pattern</i> is a single
|
|
* space, <i>str</i> is split on whitespace, with leading whitespace and runs
|
|
* of contiguous whitespace characters ignored.
|
|
*
|
|
* If <i>pattern</i> is a <code>Regexp</code>, <i>str</i> is divided where the
|
|
* pattern matches. Whenever the pattern matches a zero-length string,
|
|
* <i>str</i> is split into individual characters. If <i>pattern</i> contains
|
|
* groups, the respective matches will be returned in the array as well.
|
|
*
|
|
* If <i>pattern</i> is omitted, the value of <code>$;</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
|
|
* fields will be returned (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.
|
|
*
|
|
* " 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", "", ""]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_split_m(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
rb_encoding *enc;
|
|
VALUE spat;
|
|
VALUE limit;
|
|
int awk_split = Qfalse;
|
|
long beg, end, i = 0;
|
|
int lim = 0;
|
|
VALUE result, tmp;
|
|
|
|
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 rb_ary_new2(0);
|
|
return rb_ary_new3(1, str);
|
|
}
|
|
i = 1;
|
|
}
|
|
|
|
enc = rb_enc_get(str);
|
|
if (NIL_P(spat)) {
|
|
if (!NIL_P(rb_fs)) {
|
|
spat = rb_fs;
|
|
goto fs_set;
|
|
}
|
|
awk_split = Qtrue;
|
|
}
|
|
else {
|
|
fs_set:
|
|
if (TYPE(spat) == T_STRING && RSTRING_LEN(spat) == 1) {
|
|
if (RSTRING_PTR(spat)[0] == ' ') {
|
|
awk_split = Qtrue;
|
|
}
|
|
else {
|
|
spat = rb_reg_regcomp(rb_reg_quote(spat));
|
|
}
|
|
}
|
|
else {
|
|
spat = get_pat(spat, 1);
|
|
}
|
|
}
|
|
|
|
result = rb_ary_new();
|
|
beg = 0;
|
|
if (awk_split) {
|
|
char *ptr = RSTRING_PTR(str);
|
|
char *eptr = RSTRING_END(str);
|
|
char *bptr = ptr;
|
|
int skip = 1;
|
|
int c;
|
|
|
|
end = beg;
|
|
while (ptr < eptr) {
|
|
c = rb_enc_codepoint(ptr, eptr, enc);
|
|
ptr += rb_enc_mbclen(ptr, eptr, enc);
|
|
if (skip) {
|
|
if (rb_enc_isspace(c, enc)) {
|
|
beg = ptr - bptr;
|
|
}
|
|
else {
|
|
end = ptr - bptr;
|
|
skip = 0;
|
|
if (!NIL_P(limit) && lim <= i) break;
|
|
}
|
|
}
|
|
else {
|
|
if (rb_enc_isspace(c, enc)) {
|
|
rb_ary_push(result, rb_str_subseq(str, beg, end-beg));
|
|
skip = 1;
|
|
beg = ptr - bptr;
|
|
if (!NIL_P(limit)) ++i;
|
|
}
|
|
else {
|
|
end = ptr - bptr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
long start = beg;
|
|
long idx;
|
|
int last_null = 0;
|
|
struct re_registers *regs;
|
|
|
|
while ((end = rb_reg_search(spat, str, start, 0)) >= 0) {
|
|
regs = RMATCH(rb_backref_get())->regs;
|
|
if (start == end && BEG(0) == END(0)) {
|
|
if (!RSTRING_PTR(str)) {
|
|
rb_ary_push(result, rb_str_new("", 0));
|
|
break;
|
|
}
|
|
else if (last_null == 1) {
|
|
rb_ary_push(result, rb_str_subseq(str, beg,
|
|
rb_enc_mbclen(RSTRING_PTR(str)+beg,
|
|
RSTRING_END(str),
|
|
enc)));
|
|
beg = start;
|
|
}
|
|
else {
|
|
if (RSTRING_PTR(str)+start == RSTRING_END(str))
|
|
start++;
|
|
else
|
|
start += rb_enc_mbclen(RSTRING_PTR(str)+start,RSTRING_END(str),enc);
|
|
last_null = 1;
|
|
continue;
|
|
}
|
|
}
|
|
else {
|
|
rb_ary_push(result, rb_str_subseq(str, beg, end-beg));
|
|
beg = start = END(0);
|
|
}
|
|
last_null = 0;
|
|
|
|
for (idx=1; idx < regs->num_regs; idx++) {
|
|
if (BEG(idx) == -1) continue;
|
|
if (BEG(idx) == END(idx))
|
|
tmp = rb_str_new5(str, 0, 0);
|
|
else
|
|
tmp = rb_str_subseq(str, BEG(idx), END(idx)-BEG(idx));
|
|
rb_ary_push(result, tmp);
|
|
}
|
|
if (!NIL_P(limit) && lim <= ++i) break;
|
|
}
|
|
}
|
|
if (RSTRING_LEN(str) > 0 && (!NIL_P(limit) || RSTRING_LEN(str) > beg || lim < 0)) {
|
|
if (RSTRING_LEN(str) == beg)
|
|
tmp = rb_str_new5(str, 0, 0);
|
|
else
|
|
tmp = rb_str_subseq(str, beg, RSTRING_LEN(str)-beg);
|
|
rb_ary_push(result, tmp);
|
|
}
|
|
if (NIL_P(limit) && lim == 0) {
|
|
while (RARRAY_LEN(result) > 0 &&
|
|
RSTRING_LEN(RARRAY_PTR(result)[RARRAY_LEN(result)-1]) == 0)
|
|
rb_ary_pop(result);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
VALUE
|
|
rb_str_split(VALUE str, const char *sep0)
|
|
{
|
|
VALUE sep;
|
|
|
|
StringValue(str);
|
|
sep = rb_str_new2(sep0);
|
|
return rb_str_split_m(1, &sep, str);
|
|
}
|
|
|
|
|
|
/*
|
|
* Document-method: lines
|
|
* call-seq:
|
|
* str.lines(separator=$/) => anEnumerator
|
|
* str.lines(separator=$/) {|substr| block } => str
|
|
*
|
|
* Returns an enumerator that gives each line in the string. If a block is
|
|
* given, it iterates over each line in the string.
|
|
*
|
|
* "foo\nbar\n".lines.to_a #=> ["foo\n", "bar\n"]
|
|
* "foo\nb ar".lines.sort #=> ["b ar", "foo\n"]
|
|
*/
|
|
|
|
/*
|
|
* Document-method: each_line
|
|
* call-seq:
|
|
* str.each_line(separator=$/) {|substr| block } => str
|
|
*
|
|
* 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 on
|
|
* <code>\n</code> characters, except that multiple successive newlines are
|
|
* appended together.
|
|
*
|
|
* print "Example one\n"
|
|
* "hello\nworld".each {|s| p s}
|
|
* print "Example two\n"
|
|
* "hello\nworld".each('l') {|s| p s}
|
|
* print "Example three\n"
|
|
* "hello\n\n\nworld".each('') {|s| p s}
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* Example one
|
|
* "hello\n"
|
|
* "world"
|
|
* Example two
|
|
* "hel"
|
|
* "l"
|
|
* "o\nworl"
|
|
* "d"
|
|
* Example three
|
|
* "hello\n\n\n"
|
|
* "world"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_each_line(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
rb_encoding *enc;
|
|
VALUE rs;
|
|
int newline;
|
|
char *p = RSTRING_PTR(str), *pend = p + RSTRING_LEN(str), *s = p;
|
|
char *ptr = p;
|
|
long len = RSTRING_LEN(str), rslen;
|
|
VALUE line;
|
|
|
|
if (rb_scan_args(argc, argv, "01", &rs) == 0) {
|
|
rs = rb_rs;
|
|
}
|
|
RETURN_ENUMERATOR(str, argc, argv);
|
|
|
|
if (NIL_P(rs)) {
|
|
rb_yield(str);
|
|
return str;
|
|
}
|
|
StringValue(rs);
|
|
enc = rb_enc_check(str, rs);
|
|
rslen = RSTRING_LEN(rs);
|
|
if (rslen == 0) {
|
|
newline = '\n';
|
|
}
|
|
else {
|
|
newline = rb_enc_codepoint(RSTRING_PTR(rs), RSTRING_END(rs), enc);
|
|
}
|
|
|
|
while (p < pend) {
|
|
int c = rb_enc_codepoint(p, pend, enc);
|
|
int n = rb_enc_codelen(c, enc);
|
|
|
|
if (rslen == 0 && c == newline) {
|
|
while (rb_enc_codepoint(p, pend, enc) == newline) {
|
|
p += n;
|
|
}
|
|
p -= n;
|
|
}
|
|
if (c == newline &&
|
|
(rslen <= 1 || memcmp(RSTRING_PTR(rs), p, rslen) == 0)) {
|
|
line = rb_str_new5(str, s, p - s + (rslen ? rslen : n));
|
|
OBJ_INFECT(line, str);
|
|
rb_enc_copy(line, str);
|
|
rb_yield(line);
|
|
str_mod_check(str, ptr, len);
|
|
s = p + (rslen ? rslen : n);
|
|
}
|
|
p += n;
|
|
}
|
|
|
|
if (s != pend) {
|
|
if (p > pend) p = pend;
|
|
line = rb_str_new5(str, s, p - s);
|
|
OBJ_INFECT(line, str);
|
|
rb_enc_copy(line, str);
|
|
rb_yield(line);
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* Document-method: bytes
|
|
* call-seq:
|
|
* str.bytes => anEnumerator
|
|
* str.bytes {|fixnum| block } => str
|
|
*
|
|
* Returns an enumerator that gives each byte in the string. If a block is
|
|
* given, it iterates over each byte in the string.
|
|
*
|
|
* "hello".bytes.to_a #=> [104, 101, 108, 108, 111]
|
|
*/
|
|
|
|
/*
|
|
* Document-method: each_byte
|
|
* call-seq:
|
|
* str.each_byte {|fixnum| block } => str
|
|
*
|
|
* Passes each byte in <i>str</i> to the given block.
|
|
*
|
|
* "hello".each_byte {|c| print c, ' ' }
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* 104 101 108 108 111
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_each_byte(VALUE str)
|
|
{
|
|
long i;
|
|
|
|
RETURN_ENUMERATOR(str, 0, 0);
|
|
for (i=0; i<RSTRING_LEN(str); i++) {
|
|
rb_yield(INT2FIX(RSTRING_PTR(str)[i] & 0xff));
|
|
}
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* Document-method: chars
|
|
* call-seq:
|
|
* str.chars => anEnumerator
|
|
* str.chars {|substr| block } => str
|
|
*
|
|
* Returns an enumerator that gives each character in the string.
|
|
* If a block is given, it iterates over each character in the string.
|
|
*
|
|
* "foo".chars.to_a #=> ["f","o","o"]
|
|
*/
|
|
|
|
/*
|
|
* Document-method: each_char
|
|
* call-seq:
|
|
* str.each_char {|cstr| block } => str
|
|
*
|
|
* Passes each character in <i>str</i> to the given block.
|
|
*
|
|
* "hello".each_char {|c| print c, ' ' }
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* h e l l o
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_each_char(VALUE str)
|
|
{
|
|
int i, len = str_strlen(str, 0);
|
|
|
|
RETURN_ENUMERATOR(str, 0, 0);
|
|
for (i=0; i<len; i++) {
|
|
rb_yield(rb_str_substr(str, i, 1));
|
|
}
|
|
return str;
|
|
}
|
|
|
|
static long
|
|
chopped_length(VALUE str)
|
|
{
|
|
rb_encoding *enc = rb_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, enc);
|
|
if (!p) return 0;
|
|
if (p > beg && rb_enc_codepoint(p, end, enc) == '\n') {
|
|
p2 = rb_enc_prev_char(beg, p, enc);
|
|
if (p2 && rb_enc_codepoint(p2, end, enc) == '\r') p = p2;
|
|
}
|
|
return p - beg;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.chop! => str or nil
|
|
*
|
|
* Processes <i>str</i> as for <code>String#chop</code>, returning <i>str</i>,
|
|
* or <code>nil</code> if <i>str</i> is the empty string. See also
|
|
* <code>String#chomp!</code>.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_chop_bang(VALUE str)
|
|
{
|
|
if (RSTRING_LEN(str) > 0) {
|
|
long len;
|
|
rb_str_modify(str);
|
|
len = chopped_length(str);
|
|
STR_SET_LEN(str, len);
|
|
RSTRING_PTR(str)[len] = '\0';
|
|
return str;
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.chop => new_str
|
|
*
|
|
* Returns a new <code>String</code> 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. <code>String#chomp</code> 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)
|
|
{
|
|
VALUE str2 = rb_str_new5(str, RSTRING_PTR(str), chopped_length(str));
|
|
rb_enc_copy(str2, str);
|
|
OBJ_INFECT(str2, str);
|
|
return str2;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.chomp!(separator=$/) => str or nil
|
|
*
|
|
* Modifies <i>str</i> in place as described for <code>String#chomp</code>,
|
|
* 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)
|
|
{
|
|
rb_encoding *enc;
|
|
VALUE rs;
|
|
int newline;
|
|
char *p, *pp, *e;
|
|
long len, rslen;
|
|
|
|
if (rb_scan_args(argc, argv, "01", &rs) == 0) {
|
|
len = RSTRING_LEN(str);
|
|
if (len == 0) return Qnil;
|
|
p = RSTRING_PTR(str);
|
|
rs = rb_rs;
|
|
if (rs == rb_default_rs) {
|
|
smart_chomp:
|
|
rb_str_modify(str);
|
|
if (RSTRING_PTR(str)[len-1] == '\n') {
|
|
STR_DEC_LEN(str);
|
|
if (RSTRING_LEN(str) > 0 &&
|
|
RSTRING_PTR(str)[RSTRING_LEN(str)-1] == '\r') {
|
|
STR_DEC_LEN(str);
|
|
}
|
|
}
|
|
else if (RSTRING_PTR(str)[len-1] == '\r') {
|
|
STR_DEC_LEN(str);
|
|
}
|
|
else {
|
|
return Qnil;
|
|
}
|
|
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
|
|
return str;
|
|
}
|
|
}
|
|
if (NIL_P(rs)) return Qnil;
|
|
StringValue(rs);
|
|
enc = rb_enc_check(str, rs);
|
|
len = RSTRING_LEN(str);
|
|
if (len == 0) return Qnil;
|
|
p = RSTRING_PTR(str);
|
|
rslen = RSTRING_LEN(rs);
|
|
if (rslen == 0) {
|
|
while (len>0 && p[len-1] == '\n') {
|
|
len--;
|
|
if (len>0 && p[len-1] == '\r')
|
|
len--;
|
|
}
|
|
if (len < RSTRING_LEN(str)) {
|
|
rb_str_modify(str);
|
|
STR_SET_LEN(str, len);
|
|
RSTRING_PTR(str)[len] = '\0';
|
|
return str;
|
|
}
|
|
return Qnil;
|
|
}
|
|
if (rslen > len) return Qnil;
|
|
newline = RSTRING_PTR(rs)[rslen-1];
|
|
if (rslen == 1 && newline == '\n')
|
|
goto smart_chomp;
|
|
|
|
if (is_broken_string(rs)) {
|
|
return Qnil;
|
|
}
|
|
e = p + len;
|
|
pp = e - rslen;
|
|
if (p[len-1] == newline &&
|
|
(rslen <= 1 ||
|
|
memcmp(RSTRING_PTR(rs), pp, rslen) == 0)) {
|
|
if (ONIGENC_LEFT_ADJUST_CHAR_HEAD(enc, (UChar *)p, (UChar *)pp) != (const UChar*)pp)
|
|
return Qnil;
|
|
rb_str_modify(str);
|
|
STR_SET_LEN(str, RSTRING_LEN(str) - rslen);
|
|
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
|
|
return str;
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.chomp(separator=$/) => new_str
|
|
*
|
|
* Returns a new <code>String</code> with the given record separator removed
|
|
* from the end of <i>str</i> (if present). If <code>$/</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>).
|
|
*
|
|
* "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"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_chomp(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
str = rb_str_dup(str);
|
|
rb_str_chomp_bang(argc, argv, str);
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.lstrip! => self or nil
|
|
*
|
|
* Removes leading whitespace from <i>str</i>, returning <code>nil</code> if no
|
|
* change was made. See also <code>String#rstrip!</code> and
|
|
* <code>String#strip!</code>.
|
|
*
|
|
* " hello ".lstrip #=> "hello "
|
|
* "hello".lstrip! #=> nil
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_lstrip_bang(VALUE str)
|
|
{
|
|
rb_encoding *enc;
|
|
char *s, *t, *e;
|
|
|
|
rb_str_modify(str);
|
|
enc = rb_enc_get(str);
|
|
s = RSTRING_PTR(str);
|
|
if (!s || RSTRING_LEN(str) == 0) return Qnil;
|
|
e = t = RSTRING_END(str);
|
|
/* remove spaces at head */
|
|
while (s < e) {
|
|
int cc = rb_enc_codepoint(s, e, enc);
|
|
|
|
if (!rb_enc_isspace(cc, enc)) break;
|
|
s += rb_enc_codelen(cc, enc);
|
|
}
|
|
|
|
if (s > RSTRING_PTR(str)) {
|
|
rb_str_modify(str);
|
|
STR_SET_LEN(str, t-s);
|
|
memmove(RSTRING_PTR(str), s, RSTRING_LEN(str));
|
|
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
|
|
return str;
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.lstrip => new_str
|
|
*
|
|
* Returns a copy of <i>str</i> with leading whitespace removed. See also
|
|
* <code>String#rstrip</code> and <code>String#strip</code>.
|
|
*
|
|
* " hello ".lstrip #=> "hello "
|
|
* "hello".lstrip #=> "hello"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_lstrip(VALUE str)
|
|
{
|
|
str = rb_str_dup(str);
|
|
rb_str_lstrip_bang(str);
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.rstrip! => self or nil
|
|
*
|
|
* Removes trailing whitespace from <i>str</i>, returning <code>nil</code> if
|
|
* no change was made. See also <code>String#lstrip!</code> and
|
|
* <code>String#strip!</code>.
|
|
*
|
|
* " hello ".rstrip #=> " hello"
|
|
* "hello".rstrip! #=> nil
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_rstrip_bang(VALUE str)
|
|
{
|
|
rb_encoding *enc;
|
|
char *s, *t, *e;
|
|
int space_seen = Qfalse;
|
|
|
|
rb_str_modify(str);
|
|
enc = rb_enc_get(str);
|
|
s = RSTRING_PTR(str);
|
|
if (!s || RSTRING_LEN(str) == 0) return Qnil;
|
|
t = e = RSTRING_END(str);
|
|
while (s < e) {
|
|
int cc = rb_enc_codepoint(s, e, enc);
|
|
|
|
if (!cc || rb_enc_isspace(cc, enc)) {
|
|
if (!space_seen) t = s;
|
|
space_seen = Qtrue;
|
|
}
|
|
else {
|
|
space_seen = Qfalse;
|
|
}
|
|
s += rb_enc_codelen(cc, enc);
|
|
}
|
|
if (!space_seen) t = s;
|
|
if (t < e) {
|
|
rb_str_modify(str);
|
|
STR_SET_LEN(str, t-RSTRING_PTR(str));
|
|
RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';
|
|
return str;
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.rstrip => new_str
|
|
*
|
|
* Returns a copy of <i>str</i> with trailing whitespace removed. See also
|
|
* <code>String#lstrip</code> and <code>String#strip</code>.
|
|
*
|
|
* " hello ".rstrip #=> " hello"
|
|
* "hello".rstrip #=> "hello"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_rstrip(VALUE str)
|
|
{
|
|
str = rb_str_dup(str);
|
|
rb_str_rstrip_bang(str);
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.strip! => str or nil
|
|
*
|
|
* Removes leading and trailing whitespace from <i>str</i>. Returns
|
|
* <code>nil</code> if <i>str</i> was not altered.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_strip_bang(VALUE str)
|
|
{
|
|
VALUE l = rb_str_lstrip_bang(str);
|
|
VALUE r = rb_str_rstrip_bang(str);
|
|
|
|
if (NIL_P(l) && NIL_P(r)) return Qnil;
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.strip => new_str
|
|
*
|
|
* Returns a copy of <i>str</i> with leading and trailing whitespace removed.
|
|
*
|
|
* " hello ".strip #=> "hello"
|
|
* "\tgoodbye\r\n".strip #=> "goodbye"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_strip(VALUE str)
|
|
{
|
|
str = rb_str_dup(str);
|
|
rb_str_strip_bang(str);
|
|
return str;
|
|
}
|
|
|
|
static VALUE
|
|
scan_once(VALUE str, VALUE pat, long *start)
|
|
{
|
|
rb_encoding *enc;
|
|
VALUE result, match;
|
|
struct re_registers *regs;
|
|
long i;
|
|
|
|
enc = rb_enc_get(str);
|
|
if (rb_reg_search(pat, str, *start, 0) >= 0) {
|
|
match = rb_backref_get();
|
|
regs = RMATCH(match)->regs;
|
|
if (BEG(0) == END(0)) {
|
|
/*
|
|
* Always consume at least one character of the input string
|
|
*/
|
|
if (RSTRING_LEN(str) > END(0))
|
|
*start = END(0)+rb_enc_mbclen(RSTRING_PTR(str)+END(0),
|
|
RSTRING_END(str), enc);
|
|
else
|
|
*start = END(0)+1;
|
|
}
|
|
else {
|
|
*start = END(0);
|
|
}
|
|
if (regs->num_regs == 1) {
|
|
return rb_reg_nth_match(0, match);
|
|
}
|
|
result = rb_ary_new2(regs->num_regs);
|
|
for (i=1; i < regs->num_regs; i++) {
|
|
rb_ary_push(result, rb_reg_nth_match(i, match));
|
|
}
|
|
|
|
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
|
|
* <code>Regexp</code> or a <code>String</code>). 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;
|
|
VALUE match = Qnil;
|
|
char *p = RSTRING_PTR(str); long len = RSTRING_LEN(str);
|
|
|
|
pat = get_pat(pat, 1);
|
|
if (!rb_block_given_p()) {
|
|
VALUE ary = rb_ary_new();
|
|
|
|
while (!NIL_P(result = scan_once(str, pat, &start))) {
|
|
match = rb_backref_get();
|
|
rb_ary_push(ary, result);
|
|
}
|
|
rb_backref_set(match);
|
|
return ary;
|
|
}
|
|
|
|
while (!NIL_P(result = scan_once(str, pat, &start))) {
|
|
match = rb_backref_get();
|
|
rb_match_busy(match);
|
|
rb_yield(result);
|
|
str_mod_check(str, p, len);
|
|
rb_backref_set(match); /* restore $~ value */
|
|
}
|
|
rb_backref_set(match);
|
|
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, Qfalse);
|
|
}
|
|
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_oct(VALUE str)
|
|
{
|
|
return rb_str_to_inum(str, -8, Qfalse);
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.crypt(other_str) => new_str
|
|
*
|
|
* Applies a one-way cryptographic hash to <i>str</i> by invoking the standard
|
|
* library function <code>crypt</code>. The argument is the salt string, which
|
|
* should be two characters long, each character drawn from
|
|
* <code>[a-zA-Z0-9./]</code>.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_crypt(VALUE str, VALUE salt)
|
|
{
|
|
extern char *crypt(const char *, const char *);
|
|
VALUE result;
|
|
const char *s;
|
|
|
|
StringValue(salt);
|
|
if (RSTRING_LEN(salt) < 2)
|
|
rb_raise(rb_eArgError, "salt too short (need >=2 bytes)");
|
|
|
|
if (RSTRING_PTR(str)) s = RSTRING_PTR(str);
|
|
else s = "";
|
|
result = rb_str_new2(crypt(s, RSTRING_PTR(salt)));
|
|
OBJ_INFECT(result, str);
|
|
OBJ_INFECT(result, salt);
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.intern => symbol
|
|
* str.to_sym => symbol
|
|
*
|
|
* Returns the <code>Symbol</code> corresponding to <i>str</i>, creating the
|
|
* symbol if it did not previously exist. See <code>Symbol#id2name</code>.
|
|
*
|
|
* "Koala".intern #=> :Koala
|
|
* s = 'cat'.to_sym #=> :cat
|
|
* s == :cat #=> true
|
|
* s = '@cat'.to_sym #=> :@cat
|
|
* s == :@cat #=> true
|
|
*
|
|
* This can also be used to create symbols that cannot be represented using the
|
|
* <code>:xxx</code> notation.
|
|
*
|
|
* 'cat and dog'.to_sym #=> :"cat and dog"
|
|
*/
|
|
|
|
VALUE
|
|
rb_str_intern(VALUE s)
|
|
{
|
|
VALUE str = RB_GC_GUARD(s);
|
|
ID id;
|
|
|
|
if (OBJ_TAINTED(str) && rb_safe_level() >= 1) {
|
|
rb_raise(rb_eSecurityError, "Insecure: can't intern tainted string");
|
|
}
|
|
id = rb_intern_str(str);
|
|
return ID2SYM(id);
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.ord => integer
|
|
*
|
|
* Return the <code>Integer</code> ordinal of a one-character string.
|
|
*
|
|
* "a".ord #=> 97
|
|
*/
|
|
|
|
VALUE
|
|
rb_str_ord(VALUE s)
|
|
{
|
|
int c;
|
|
|
|
c = rb_enc_codepoint(RSTRING_PTR(s), RSTRING_END(s), rb_enc_get(s));
|
|
return INT2NUM(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 <code>Fixnum</code> parameter, defaulting
|
|
* to 16. The result is simply the sum of the binary value of each character in
|
|
* <i>str</i> modulo <code>2n - 1</code>. This is not a particularly good
|
|
* checksum.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_sum(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
VALUE vbits;
|
|
int bits;
|
|
char *ptr, *p, *pend;
|
|
long len;
|
|
|
|
if (rb_scan_args(argc, argv, "01", &vbits) == 0) {
|
|
bits = 16;
|
|
}
|
|
else bits = NUM2INT(vbits);
|
|
|
|
ptr = p = RSTRING_PTR(str);
|
|
len = RSTRING_LEN(str);
|
|
pend = p + len;
|
|
if (bits >= sizeof(long)*CHAR_BIT) {
|
|
VALUE sum = INT2FIX(0);
|
|
|
|
while (p < pend) {
|
|
str_mod_check(str, ptr, len);
|
|
sum = rb_funcall(sum, '+', 1, INT2FIX((unsigned char)*p));
|
|
p++;
|
|
}
|
|
if (bits != 0) {
|
|
VALUE mod;
|
|
|
|
mod = rb_funcall(INT2FIX(1), rb_intern("<<"), 1, INT2FIX(bits));
|
|
mod = rb_funcall(mod, '-', 1, INT2FIX(1));
|
|
sum = rb_funcall(sum, '&', 1, mod);
|
|
}
|
|
return sum;
|
|
}
|
|
else {
|
|
unsigned long sum = 0;
|
|
|
|
while (p < pend) {
|
|
str_mod_check(str, ptr, len);
|
|
sum += (unsigned char)*p;
|
|
p++;
|
|
}
|
|
if (bits != 0) {
|
|
sum &= (((unsigned long)1)<<bits)-1;
|
|
}
|
|
return rb_int2inum(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, *f = " ";
|
|
long n, llen, rlen;
|
|
volatile VALUE pad;
|
|
int asc = 1;
|
|
|
|
rb_scan_args(argc, argv, "11", &w, &pad);
|
|
enc = rb_enc_get(str);
|
|
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);
|
|
asc = is_ascii_string(pad);
|
|
if (flen == 0) {
|
|
rb_raise(rb_eArgError, "zero width padding");
|
|
}
|
|
}
|
|
len = str_strlen(str, enc);
|
|
if (width < 0 || len >= width) return rb_str_dup(str);
|
|
n = width - len;
|
|
llen = (jflag == 'l') ? 0 : ((jflag == 'r') ? n : n/2);
|
|
rlen = n - llen;
|
|
res = rb_str_new5(str, 0, RSTRING_LEN(str)+n*flen/fclen+2);
|
|
p = RSTRING_PTR(res);
|
|
while (llen) {
|
|
if (flen <= 1) {
|
|
*p++ = *f;
|
|
llen--;
|
|
}
|
|
else if (llen > fclen) {
|
|
memcpy(p,f,flen);
|
|
p += flen;
|
|
llen -= fclen;
|
|
}
|
|
else {
|
|
char *fp = str_nth(f, f+flen, llen, enc, asc);
|
|
n = fp - f;
|
|
memcpy(p,f,n);
|
|
p+=n;
|
|
break;
|
|
}
|
|
}
|
|
memcpy(p, RSTRING_PTR(str), RSTRING_LEN(str));
|
|
p+=RSTRING_LEN(str);
|
|
while (rlen) {
|
|
if (flen <= 1) {
|
|
*p++ = *f;
|
|
rlen--;
|
|
}
|
|
else if (rlen > fclen) {
|
|
memcpy(p,f,flen);
|
|
p += flen;
|
|
rlen -= fclen;
|
|
}
|
|
else {
|
|
char *fp = str_nth(f, f+flen, rlen, enc, asc);
|
|
n = fp - f;
|
|
memcpy(p,f,n);
|
|
p+=n;
|
|
break;
|
|
}
|
|
}
|
|
*p = '\0';
|
|
STR_SET_LEN(res, p-RSTRING_PTR(res));
|
|
OBJ_INFECT(res, str);
|
|
if (!NIL_P(pad)) OBJ_INFECT(res, pad);
|
|
rb_enc_associate(res, enc);
|
|
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
|
|
* <code>String</code> 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
|
|
* <code>String</code> 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(integer, padstr) => new_str
|
|
*
|
|
* If <i>integer</i> is greater than the length of <i>str</i>, returns a new
|
|
* <code>String</code> of length <i>integer</i> with <i>str</i> centered and
|
|
* padded with <i>padstr</i>; otherwise, returns <i>str</i>.
|
|
*
|
|
* "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]
|
|
*
|
|
* Searches the string for <i>sep</i> and returns the part before
|
|
* it, the <i>sep</i>, and the part after it. If <i>sep</i> is not found,
|
|
* returns <i>str</i> and two empty strings.
|
|
*
|
|
* "hello".partition("l") #=> ["he", "l", "lo"]
|
|
* "hello".partition("x") #=> ["hello", "", ""]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_partition(VALUE str, VALUE sep)
|
|
{
|
|
long pos;
|
|
int regex = Qfalse;
|
|
|
|
if (TYPE(sep) == T_REGEXP) {
|
|
pos = rb_reg_search(sep, str, 0, 0);
|
|
regex = Qtrue;
|
|
}
|
|
else {
|
|
VALUE tmp;
|
|
|
|
tmp = rb_check_string_type(sep);
|
|
if (NIL_P(tmp)) {
|
|
rb_raise(rb_eTypeError, "type mismatch: %s given",
|
|
rb_obj_classname(sep));
|
|
}
|
|
pos = rb_str_index(str, sep, 0);
|
|
}
|
|
if (pos < 0) {
|
|
failed:
|
|
return rb_ary_new3(3, str, rb_str_new(0,0),rb_str_new(0,0));
|
|
}
|
|
if (regex) {
|
|
sep = rb_str_subpat(str, sep, 0);
|
|
if (pos == 0 && RSTRING_LEN(sep) == 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)));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.rpartition(sep) => [head, sep, tail]
|
|
*
|
|
* Searches <i>sep</i> in the string from the end of the string, and
|
|
* returns the part before it, the <i>sep</i>, and the part after it.
|
|
* If <i>sep</i> is not found, returns two empty strings and
|
|
* <i>str</i>.
|
|
*
|
|
* "hello".rpartition("l") #=> ["hel", "l", "o"]
|
|
* "hello".rpartition("x") #=> ["", "", "hello"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_rpartition(VALUE str, VALUE sep)
|
|
{
|
|
long pos = RSTRING_LEN(str);
|
|
int regex = Qfalse;
|
|
|
|
if (TYPE(sep) == T_REGEXP) {
|
|
pos = rb_reg_search(sep, str, pos, 1);
|
|
regex = Qtrue;
|
|
}
|
|
else {
|
|
VALUE tmp;
|
|
|
|
tmp = rb_check_string_type(sep);
|
|
if (NIL_P(tmp)) {
|
|
rb_raise(rb_eTypeError, "type mismatch: %s given",
|
|
rb_obj_classname(sep));
|
|
}
|
|
pos = rb_str_sublen(str, pos);
|
|
pos = rb_str_rindex(str, sep, pos);
|
|
}
|
|
if (pos < 0) {
|
|
return rb_ary_new3(3, rb_str_new(0,0),rb_str_new(0,0), str);
|
|
}
|
|
if (regex) {
|
|
sep = rb_reg_nth_match(0, rb_backref_get());
|
|
}
|
|
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)));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.start_with?([prefix]+) => true or false
|
|
*
|
|
* Returns true if <i>str</i> starts with the prefix given.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_start_with(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<argc; i++) {
|
|
VALUE tmp = rb_check_string_type(argv[i]);
|
|
if (NIL_P(tmp)) continue;
|
|
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?([suffix]+) => true or false
|
|
*
|
|
* Returns true if <i>str</i> ends with the suffix given.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_str_end_with(int argc, VALUE *argv, VALUE str)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<argc; i++) {
|
|
VALUE tmp = rb_check_string_type(argv[i]);
|
|
if (NIL_P(tmp)) continue;
|
|
rb_enc_check(str, tmp);
|
|
if (RSTRING_LEN(str) < RSTRING_LEN(tmp)) continue;
|
|
if (memcmp(RSTRING_PTR(str) + RSTRING_LEN(str) - RSTRING_LEN(tmp),
|
|
RSTRING_PTR(tmp), RSTRING_LEN(tmp)) == 0)
|
|
return Qtrue;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
void
|
|
rb_str_setter(VALUE val, ID id, VALUE *var)
|
|
{
|
|
if (!NIL_P(val) && TYPE(val) != T_STRING) {
|
|
rb_raise(rb_eTypeError, "value of %s must be String", rb_id2name(id));
|
|
}
|
|
*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));
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* str.valid_encoding? => true or false
|
|
*
|
|
* Returns true for a string which 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 cr == ENC_CODERANGE_BROKEN ? Qfalse : Qtrue;
|
|
}
|
|
|
|
/*
|
|
* 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 cr == ENC_CODERANGE_7BIT ? Qtrue : Qfalse;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* Document-class: Symbol
|
|
*
|
|
* <code>Symbol</code> objects represent names and some strings
|
|
* inside the Ruby
|
|
* interpreter. They are generated using the <code>:name</code> and
|
|
* <code>:"string"</code> literals
|
|
* syntax, and by the various <code>to_sym</code> methods. The same
|
|
* <code>Symbol</code> 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
|
|
* <code>Symbol</code> <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.id #=> 2514190
|
|
* $f2.id #=> 2514190
|
|
* $f3.id #=> 2514190
|
|
*
|
|
*/
|
|
|
|
|
|
/*
|
|
* 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>. Otherwise, compares them
|
|
* as strings.
|
|
*/
|
|
|
|
static VALUE
|
|
sym_equal(VALUE sym1, VALUE sym2)
|
|
{
|
|
if (sym1 == sym2) return Qtrue;
|
|
return Qfalse;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* sym.to_i => fixnum
|
|
*
|
|
* Returns an integer that is unique for each symbol within a
|
|
* particular execution of a program.
|
|
*
|
|
* :fred.to_i #=> 9809
|
|
* "fred".to_sym.to_i #=> 9809
|
|
*/
|
|
|
|
static VALUE
|
|
sym_to_i(VALUE sym)
|
|
{
|
|
ID id = SYM2ID(sym);
|
|
|
|
return LONG2FIX(id);
|
|
}
|
|
|
|
|
|
/*
|
|
* 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, klass = Qundef;
|
|
ID id = SYM2ID(sym);
|
|
rb_encoding *enc;
|
|
|
|
sym = rb_id2str(id);
|
|
enc = rb_enc_get(sym);
|
|
str = rb_enc_str_new(0, RSTRING_LEN(sym)+1, enc);
|
|
RSTRING_PTR(str)[0] = ':';
|
|
memcpy(RSTRING_PTR(str)+1, RSTRING_PTR(sym), RSTRING_LEN(sym));
|
|
if (RSTRING_LEN(sym) != strlen(RSTRING_PTR(sym)) ||
|
|
!rb_enc_symname_p(RSTRING_PTR(sym), enc)) {
|
|
str = rb_str_dump(str);
|
|
strncpy(RSTRING_PTR(str), ":\"", 2);
|
|
}
|
|
if (klass != Qundef) {
|
|
rb_str_cat2(str, "/");
|
|
rb_str_append(str, rb_inspect(klass));
|
|
}
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* sym.id2name => string
|
|
* sym.to_s => string
|
|
*
|
|
* Returns the name or string corresponding to <i>sym</i>.
|
|
*
|
|
* :fred.id2name #=> "fred"
|
|
*/
|
|
|
|
|
|
VALUE
|
|
rb_sym_to_s(VALUE sym)
|
|
{
|
|
ID id = SYM2ID(sym);
|
|
|
|
return str_new3(rb_cString, rb_id2str(id));
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* sym.to_sym => sym
|
|
* sym.intern => sym
|
|
*
|
|
* In general, <code>to_sym</code> returns the <code>Symbol</code> 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;
|
|
}
|
|
|
|
static VALUE
|
|
sym_call(VALUE args, VALUE sym, int argc, VALUE *argv)
|
|
{
|
|
VALUE obj;
|
|
|
|
if (argc < 1) {
|
|
rb_raise(rb_eArgError, "no receiver given");
|
|
}
|
|
obj = argv[0];
|
|
return rb_funcall3(obj, (ID)sym, argc - 1, argv + 1);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* sym.to_proc
|
|
*
|
|
* Returns a _Proc_ object which respond to the given method by _sym_.
|
|
*
|
|
* (1..3).collect(&:to_s) #=> ["1", "2", "3"]
|
|
*/
|
|
|
|
static VALUE
|
|
sym_to_proc(VALUE sym)
|
|
{
|
|
return rb_proc_new(sym_call, (VALUE)SYM2ID(sym));
|
|
}
|
|
|
|
|
|
static VALUE
|
|
sym_succ(VALUE sym)
|
|
{
|
|
return rb_str_intern(rb_str_succ(rb_sym_to_s(sym)));
|
|
}
|
|
|
|
static VALUE
|
|
sym_cmp(VALUE sym, VALUE other)
|
|
{
|
|
if (!SYMBOL_P(other)) {
|
|
return Qnil;
|
|
}
|
|
return rb_str_cmp_m(rb_sym_to_s(sym), rb_sym_to_s(other));
|
|
}
|
|
|
|
static VALUE
|
|
sym_casecmp(VALUE sym, VALUE other)
|
|
{
|
|
if (!SYMBOL_P(other)) {
|
|
return Qnil;
|
|
}
|
|
return rb_str_casecmp(rb_sym_to_s(sym), rb_sym_to_s(other));
|
|
}
|
|
|
|
static VALUE
|
|
sym_match(VALUE sym, VALUE other)
|
|
{
|
|
return rb_str_match(rb_sym_to_s(sym), other);
|
|
}
|
|
|
|
static VALUE
|
|
sym_eqq(VALUE sym, VALUE other)
|
|
{
|
|
if (sym == other) return Qtrue;
|
|
return rb_str_equal(rb_sym_to_s(sym), other);
|
|
}
|
|
|
|
static VALUE
|
|
sym_aref(int argc, VALUE *argv, VALUE sym)
|
|
{
|
|
return rb_str_aref_m(argc, argv, rb_sym_to_s(sym));
|
|
}
|
|
|
|
static VALUE
|
|
sym_length(VALUE sym)
|
|
{
|
|
return rb_str_length(rb_id2str(SYM2ID(sym)));
|
|
}
|
|
|
|
static VALUE
|
|
sym_empty(VALUE sym)
|
|
{
|
|
return rb_str_empty(rb_id2str(SYM2ID(sym)));
|
|
}
|
|
|
|
static VALUE
|
|
sym_upcase(VALUE sym)
|
|
{
|
|
return rb_str_intern(rb_str_upcase(rb_id2str(SYM2ID(sym))));
|
|
}
|
|
|
|
static VALUE
|
|
sym_downcase(VALUE sym)
|
|
{
|
|
return rb_str_intern(rb_str_downcase(rb_id2str(SYM2ID(sym))));
|
|
}
|
|
|
|
static VALUE
|
|
sym_capitalize(VALUE sym)
|
|
{
|
|
return rb_str_intern(rb_str_capitalize(rb_id2str(SYM2ID(sym))));
|
|
}
|
|
|
|
static VALUE
|
|
sym_swapcase(VALUE sym)
|
|
{
|
|
return rb_str_intern(rb_str_swapcase(rb_id2str(SYM2ID(sym))));
|
|
}
|
|
|
|
static VALUE
|
|
sym_encoding(VALUE sym)
|
|
{
|
|
return rb_obj_encoding(rb_id2str(SYM2ID(sym)));
|
|
}
|
|
|
|
ID
|
|
rb_to_id(VALUE name)
|
|
{
|
|
VALUE tmp;
|
|
ID id;
|
|
|
|
switch (TYPE(name)) {
|
|
default:
|
|
tmp = rb_check_string_type(name);
|
|
if (NIL_P(tmp)) {
|
|
rb_raise(rb_eTypeError, "%s is not a symbol",
|
|
RSTRING_PTR(rb_inspect(name)));
|
|
}
|
|
name = tmp;
|
|
/* fall through */
|
|
case T_STRING:
|
|
name = rb_str_intern(name);
|
|
/* fall through */
|
|
case T_SYMBOL:
|
|
return SYM2ID(name);
|
|
}
|
|
return id;
|
|
}
|
|
|
|
/*
|
|
* A <code>String</code> object holds and manipulates an arbitrary sequence of
|
|
* bytes, typically representing characters. String objects may be created
|
|
* using <code>String::new</code> or as literals.
|
|
*
|
|
* Because of aliasing issues, users of strings should be aware of the methods
|
|
* that modify the contents of a <code>String</code> object. Typically,
|
|
* methods with names ending in ``!'' modify their receiver, while those
|
|
* without a ``!'' return a new <code>String</code>. However, there are
|
|
* exceptions, such as <code>String#[]=</code>.
|
|
*
|
|
*/
|
|
|
|
void
|
|
Init_String(void)
|
|
{
|
|
rb_cString = rb_define_class("String", rb_cObject);
|
|
rb_include_module(rb_cString, rb_mComparable);
|
|
rb_define_alloc_func(rb_cString, 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, "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, "+", 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, "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, "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, "upcase", rb_str_upcase, 0);
|
|
rb_define_method(rb_cString, "downcase", rb_str_downcase, 0);
|
|
rb_define_method(rb_cString, "capitalize", rb_str_capitalize, 0);
|
|
rb_define_method(rb_cString, "swapcase", rb_str_swapcase, 0);
|
|
|
|
rb_define_method(rb_cString, "upcase!", rb_str_upcase_bang, 0);
|
|
rb_define_method(rb_cString, "downcase!", rb_str_downcase_bang, 0);
|
|
rb_define_method(rb_cString, "capitalize!", rb_str_capitalize_bang, 0);
|
|
rb_define_method(rb_cString, "swapcase!", rb_str_swapcase_bang, 0);
|
|
|
|
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_each_line, -1);
|
|
rb_define_method(rb_cString, "bytes", rb_str_each_byte, 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, 1);
|
|
rb_define_method(rb_cString, "<<", rb_str_concat, 1);
|
|
rb_define_method(rb_cString, "crypt", rb_str_crypt, 1);
|
|
rb_define_method(rb_cString, "intern", rb_str_intern, 0);
|
|
rb_define_method(rb_cString, "to_sym", rb_str_intern, 0);
|
|
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, "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, "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, "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, "valid_encoding?", rb_str_valid_encoding_p, 0);
|
|
rb_define_method(rb_cString, "ascii_only?", rb_str_is_ascii_only_p, 0);
|
|
|
|
id_to_s = rb_intern("to_s");
|
|
|
|
rb_fs = Qnil;
|
|
rb_define_variable("$;", &rb_fs);
|
|
rb_define_variable("$-F", &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", rb_sym_all_symbols, 0); /* in parse.y */
|
|
|
|
rb_define_method(rb_cSymbol, "==", sym_equal, 1);
|
|
rb_define_method(rb_cSymbol, "to_i", sym_to_i, 0);
|
|
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, "intern", sym_to_sym, 0);
|
|
rb_define_method(rb_cSymbol, "to_sym", sym_to_sym, 0);
|
|
rb_define_method(rb_cSymbol, "to_proc", 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, "=~", sym_match, 1);
|
|
rb_define_method(rb_cSymbol, "===", sym_eqq, 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, -1);
|
|
|
|
rb_define_method(rb_cSymbol, "upcase", sym_upcase, 0);
|
|
rb_define_method(rb_cSymbol, "downcase", sym_downcase, 0);
|
|
rb_define_method(rb_cSymbol, "capitalize", sym_capitalize, 0);
|
|
rb_define_method(rb_cSymbol, "swapcase", sym_swapcase, 0);
|
|
|
|
rb_define_method(rb_cSymbol, "encoding", sym_encoding, 0);
|
|
}
|