mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
28b9f11d5a
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47744 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
3978 lines
92 KiB
C
3978 lines
92 KiB
C
/**********************************************************************
|
|
|
|
hash.c -
|
|
|
|
$Author$
|
|
created at: Mon Nov 22 18:51:18 JST 1993
|
|
|
|
Copyright (C) 1993-2007 Yukihiro Matsumoto
|
|
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
|
|
Copyright (C) 2000 Information-technology Promotion Agency, Japan
|
|
|
|
**********************************************************************/
|
|
|
|
#include "ruby/ruby.h"
|
|
#include "ruby/st.h"
|
|
#include "ruby/util.h"
|
|
#include "ruby/encoding.h"
|
|
#include "internal.h"
|
|
#include <errno.h>
|
|
#include "probes.h"
|
|
#include "id.h"
|
|
|
|
#ifdef __APPLE__
|
|
# ifdef HAVE_CRT_EXTERNS_H
|
|
# include <crt_externs.h>
|
|
# else
|
|
# include "missing/crt_externs.h"
|
|
# endif
|
|
#endif
|
|
|
|
#define HAS_EXTRA_STATES(hash, klass) ( \
|
|
((klass = has_extra_methods(rb_obj_class(hash))) != 0) || \
|
|
FL_TEST((hash), FL_EXIVAR|FL_TAINT|HASH_PROC_DEFAULT) || \
|
|
!NIL_P(RHASH_IFNONE(hash)))
|
|
|
|
static VALUE
|
|
has_extra_methods(VALUE klass)
|
|
{
|
|
const VALUE base = rb_cHash;
|
|
VALUE c = klass;
|
|
while (c != base) {
|
|
st_table *mtbl = RCLASS_M_TBL(c);
|
|
if (mtbl && mtbl->num_entries) return klass;
|
|
c = RCLASS_SUPER(c);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static VALUE rb_hash_s_try_convert(VALUE, VALUE);
|
|
|
|
/*
|
|
* Hash WB strategy:
|
|
* 1. Check mutate st_* functions
|
|
* * st_insert()
|
|
* * st_insert2()
|
|
* * st_update()
|
|
* * st_add_direct()
|
|
* 2. Insert WBs
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_freeze(VALUE hash)
|
|
{
|
|
return rb_obj_freeze(hash);
|
|
}
|
|
|
|
VALUE rb_cHash;
|
|
|
|
static VALUE envtbl;
|
|
static ID id_hash, id_yield, id_default, id_flatten_bang;
|
|
|
|
VALUE
|
|
rb_hash_ifnone(VALUE h)
|
|
{
|
|
return RHASH_IFNONE(h);
|
|
}
|
|
|
|
VALUE
|
|
rb_hash_set_ifnone(VALUE hash, VALUE ifnone)
|
|
{
|
|
RB_OBJ_WRITE(hash, (&RHASH(hash)->ifnone), ifnone);
|
|
return hash;
|
|
}
|
|
|
|
static int
|
|
rb_any_cmp(VALUE a, VALUE b)
|
|
{
|
|
if (a == b) return 0;
|
|
if (FIXNUM_P(a) && FIXNUM_P(b)) {
|
|
return a != b;
|
|
}
|
|
if (RB_TYPE_P(a, T_STRING) && RBASIC(a)->klass == rb_cString &&
|
|
RB_TYPE_P(b, T_STRING) && RBASIC(b)->klass == rb_cString) {
|
|
return rb_str_hash_cmp(a, b);
|
|
}
|
|
if (a == Qundef || b == Qundef) return -1;
|
|
if (SYMBOL_P(a) && SYMBOL_P(b)) {
|
|
return a != b;
|
|
}
|
|
|
|
return !rb_eql(a, b);
|
|
}
|
|
|
|
static VALUE
|
|
hash_recursive(VALUE obj, VALUE arg, int recurse)
|
|
{
|
|
if (recurse) return INT2FIX(0);
|
|
return rb_funcallv(obj, id_hash, 0, 0);
|
|
}
|
|
|
|
VALUE
|
|
rb_hash(VALUE obj)
|
|
{
|
|
VALUE hval = rb_exec_recursive_outer(hash_recursive, obj, 0);
|
|
|
|
while (!FIXNUM_P(hval)) {
|
|
if (RB_TYPE_P(hval, T_BIGNUM)) {
|
|
int sign;
|
|
unsigned long ul;
|
|
sign = rb_integer_pack(hval, &ul, 1, sizeof(ul), 0,
|
|
INTEGER_PACK_NATIVE_BYTE_ORDER);
|
|
ul &= (1UL << (sizeof(long)*CHAR_BIT-1)) - 1;
|
|
if (sign < 0)
|
|
return LONG2FIX(-(long)ul);
|
|
return LONG2FIX((long)ul);
|
|
}
|
|
hval = rb_to_int(hval);
|
|
}
|
|
return hval;
|
|
}
|
|
|
|
long rb_objid_hash(st_index_t index);
|
|
|
|
static st_index_t
|
|
rb_any_hash(VALUE a)
|
|
{
|
|
VALUE hval;
|
|
st_index_t hnum;
|
|
|
|
if (SPECIAL_CONST_P(a)) {
|
|
if (a == Qundef) return 0;
|
|
if (SYMBOL_P(a)) a >>= (RUBY_SPECIAL_SHIFT + ID_SCOPE_SHIFT);
|
|
hnum = rb_objid_hash((st_index_t)a);
|
|
}
|
|
else if (BUILTIN_TYPE(a) == T_STRING) {
|
|
hnum = rb_str_hash(a);
|
|
}
|
|
else {
|
|
hval = rb_hash(a);
|
|
hnum = FIX2LONG(hval);
|
|
}
|
|
hnum <<= 1;
|
|
return (st_index_t)RSHIFT(hnum, 1);
|
|
}
|
|
|
|
long
|
|
rb_objid_hash(st_index_t index)
|
|
{
|
|
st_index_t hnum = rb_hash_start(index);
|
|
hnum = rb_hash_uint(hnum, (st_index_t)rb_any_hash);
|
|
hnum = rb_hash_end(hnum);
|
|
return hnum;
|
|
}
|
|
|
|
int
|
|
rb_hash_iter_lev(VALUE h)
|
|
{
|
|
return RHASH_ITER_LEV(h);
|
|
}
|
|
|
|
static const struct st_hash_type objhash = {
|
|
rb_any_cmp,
|
|
rb_any_hash,
|
|
};
|
|
|
|
extern const struct st_hash_type st_hashtype_num;
|
|
#define identhash st_hashtype_num
|
|
|
|
typedef int st_foreach_func(st_data_t, st_data_t, st_data_t);
|
|
|
|
struct foreach_safe_arg {
|
|
st_table *tbl;
|
|
st_foreach_func *func;
|
|
st_data_t arg;
|
|
};
|
|
|
|
static int
|
|
foreach_safe_i(st_data_t key, st_data_t value, st_data_t args, int error)
|
|
{
|
|
int status;
|
|
struct foreach_safe_arg *arg = (void *)args;
|
|
|
|
if (error) return ST_STOP;
|
|
status = (*arg->func)(key, value, arg->arg);
|
|
if (status == ST_CONTINUE) {
|
|
return ST_CHECK;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
void
|
|
st_foreach_safe(st_table *table, int (*func)(ANYARGS), st_data_t a)
|
|
{
|
|
struct foreach_safe_arg arg;
|
|
|
|
arg.tbl = table;
|
|
arg.func = (st_foreach_func *)func;
|
|
arg.arg = a;
|
|
if (st_foreach_check(table, foreach_safe_i, (st_data_t)&arg, 0)) {
|
|
rb_raise(rb_eRuntimeError, "hash modified during iteration");
|
|
}
|
|
}
|
|
|
|
typedef int rb_foreach_func(VALUE, VALUE, VALUE);
|
|
|
|
struct hash_foreach_arg {
|
|
VALUE hash;
|
|
rb_foreach_func *func;
|
|
VALUE arg;
|
|
};
|
|
|
|
static int
|
|
hash_foreach_iter(st_data_t key, st_data_t value, st_data_t argp, int error)
|
|
{
|
|
struct hash_foreach_arg *arg = (struct hash_foreach_arg *)argp;
|
|
int status;
|
|
st_table *tbl;
|
|
|
|
if (error) return ST_STOP;
|
|
tbl = RHASH(arg->hash)->ntbl;
|
|
status = (*arg->func)((VALUE)key, (VALUE)value, arg->arg);
|
|
if (RHASH(arg->hash)->ntbl != tbl) {
|
|
rb_raise(rb_eRuntimeError, "rehash occurred during iteration");
|
|
}
|
|
switch (status) {
|
|
case ST_DELETE:
|
|
FL_SET(arg->hash, HASH_DELETED);
|
|
return ST_DELETE;
|
|
case ST_CONTINUE:
|
|
break;
|
|
case ST_STOP:
|
|
return ST_STOP;
|
|
}
|
|
return ST_CHECK;
|
|
}
|
|
|
|
static VALUE
|
|
hash_foreach_ensure_rollback(VALUE hash)
|
|
{
|
|
RHASH_ITER_LEV(hash)++;
|
|
return 0;
|
|
}
|
|
|
|
static VALUE
|
|
hash_foreach_ensure(VALUE hash)
|
|
{
|
|
if (--RHASH_ITER_LEV(hash) == 0) {
|
|
if (FL_TEST(hash, HASH_DELETED)) {
|
|
st_cleanup_safe(RHASH(hash)->ntbl, (st_data_t)Qundef);
|
|
FL_UNSET(hash, HASH_DELETED);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static VALUE
|
|
hash_foreach_call(VALUE arg)
|
|
{
|
|
VALUE hash = ((struct hash_foreach_arg *)arg)->hash;
|
|
if (st_foreach_check(RHASH(hash)->ntbl, hash_foreach_iter, (st_data_t)arg, (st_data_t)Qundef)) {
|
|
rb_raise(rb_eRuntimeError, "hash modified during iteration");
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
void
|
|
rb_hash_foreach(VALUE hash, int (*func)(ANYARGS), VALUE farg)
|
|
{
|
|
struct hash_foreach_arg arg;
|
|
|
|
if (!RHASH(hash)->ntbl)
|
|
return;
|
|
RHASH_ITER_LEV(hash)++;
|
|
arg.hash = hash;
|
|
arg.func = (rb_foreach_func *)func;
|
|
arg.arg = farg;
|
|
rb_ensure(hash_foreach_call, (VALUE)&arg, hash_foreach_ensure, hash);
|
|
}
|
|
|
|
static VALUE
|
|
hash_alloc(VALUE klass)
|
|
{
|
|
NEWOBJ_OF(hash, struct RHash, klass, T_HASH | (RGENGC_WB_PROTECTED_HASH ? FL_WB_PROTECTED : 0));
|
|
|
|
RHASH_SET_IFNONE((VALUE)hash, Qnil);
|
|
|
|
return (VALUE)hash;
|
|
}
|
|
|
|
static VALUE
|
|
empty_hash_alloc(VALUE klass)
|
|
{
|
|
if (RUBY_DTRACE_HASH_CREATE_ENABLED()) {
|
|
RUBY_DTRACE_HASH_CREATE(0, rb_sourcefile(), rb_sourceline());
|
|
}
|
|
|
|
return hash_alloc(klass);
|
|
}
|
|
|
|
VALUE
|
|
rb_hash_new(void)
|
|
{
|
|
return hash_alloc(rb_cHash);
|
|
}
|
|
|
|
static inline VALUE
|
|
rb_hash_dup_empty(VALUE hash)
|
|
{
|
|
NEWOBJ_OF(ret, struct RHash,
|
|
rb_obj_class(hash),
|
|
(RBASIC(hash)->flags)&(T_MASK|FL_EXIVAR|FL_TAINT));
|
|
if (FL_TEST((hash), FL_EXIVAR))
|
|
rb_copy_generic_ivar((VALUE)(ret),(VALUE)(hash));
|
|
|
|
if (FL_TEST(hash, HASH_PROC_DEFAULT)) {
|
|
FL_SET(ret, HASH_PROC_DEFAULT);
|
|
}
|
|
RHASH_SET_IFNONE(ret, RHASH_IFNONE(hash));
|
|
return (VALUE)ret;
|
|
}
|
|
|
|
VALUE
|
|
rb_hash_dup(VALUE hash)
|
|
{
|
|
VALUE ret = rb_hash_dup_empty(hash);
|
|
if (!RHASH_EMPTY_P(hash))
|
|
RHASH(ret)->ntbl = st_copy(RHASH(hash)->ntbl);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
rb_hash_modify_check(VALUE hash)
|
|
{
|
|
rb_check_frozen(hash);
|
|
}
|
|
|
|
static struct st_table *
|
|
hash_tbl(VALUE hash)
|
|
{
|
|
if (!RHASH(hash)->ntbl) {
|
|
RHASH(hash)->ntbl = st_init_table(&objhash);
|
|
}
|
|
return RHASH(hash)->ntbl;
|
|
}
|
|
|
|
struct st_table *
|
|
rb_hash_tbl(VALUE hash)
|
|
{
|
|
OBJ_WB_UNPROTECT(hash);
|
|
return hash_tbl(hash);
|
|
}
|
|
|
|
struct st_table *
|
|
rb_hash_tbl_raw(VALUE hash)
|
|
{
|
|
return hash_tbl(hash);
|
|
}
|
|
|
|
static void
|
|
rb_hash_modify(VALUE hash)
|
|
{
|
|
rb_hash_modify_check(hash);
|
|
hash_tbl(hash);
|
|
}
|
|
|
|
NORETURN(static void no_new_key(void));
|
|
static void
|
|
no_new_key(void)
|
|
{
|
|
rb_raise(rb_eRuntimeError, "can't add a new key into hash during iteration");
|
|
}
|
|
|
|
struct update_callback_arg {
|
|
VALUE hash;
|
|
st_data_t arg;
|
|
};
|
|
|
|
#define NOINSERT_UPDATE_CALLBACK(func) \
|
|
static int \
|
|
func##_noinsert(st_data_t *key, st_data_t *val, st_data_t arg, int existing) \
|
|
{ \
|
|
if (!existing) no_new_key(); \
|
|
return func(key, val, (struct update_arg *)arg, existing); \
|
|
} \
|
|
\
|
|
static int \
|
|
func##_insert(st_data_t *key, st_data_t *val, st_data_t arg, int existing) \
|
|
{ \
|
|
return func(key, val, (struct update_arg *)arg, existing); \
|
|
}
|
|
|
|
struct update_arg {
|
|
st_data_t arg;
|
|
VALUE hash;
|
|
VALUE new_key;
|
|
VALUE old_key;
|
|
VALUE new_value;
|
|
VALUE old_value;
|
|
};
|
|
|
|
static int
|
|
tbl_update(VALUE hash, VALUE key, int (*func)(st_data_t *key, st_data_t *val, st_data_t arg, int existing), st_data_t optional_arg)
|
|
{
|
|
struct update_arg arg;
|
|
int result;
|
|
|
|
arg.arg = optional_arg;
|
|
arg.hash = hash;
|
|
arg.new_key = 0;
|
|
arg.old_key = Qundef;
|
|
arg.new_value = 0;
|
|
arg.old_value = Qundef;
|
|
|
|
result = st_update(RHASH(hash)->ntbl, (st_data_t)key, func, (st_data_t)&arg);
|
|
|
|
/* write barrier */
|
|
if (arg.new_key) RB_OBJ_WRITTEN(hash, arg.old_key, arg.new_key);
|
|
if (arg.new_value) RB_OBJ_WRITTEN(hash, arg.old_value, arg.new_value);
|
|
|
|
return result;
|
|
}
|
|
|
|
#define UPDATE_CALLBACK(iter_lev, func) ((iter_lev) > 0 ? func##_noinsert : func##_insert)
|
|
|
|
#define RHASH_UPDATE_ITER(h, iter_lev, key, func, a) do { \
|
|
tbl_update((h), (key), UPDATE_CALLBACK((iter_lev), func), (st_data_t)(a)); \
|
|
} while (0)
|
|
|
|
#define RHASH_UPDATE(hash, key, func, arg) \
|
|
RHASH_UPDATE_ITER(hash, RHASH_ITER_LEV(hash), key, func, arg)
|
|
|
|
static void
|
|
default_proc_arity_check(VALUE proc)
|
|
{
|
|
int n = rb_proc_arity(proc);
|
|
|
|
if (rb_proc_lambda_p(proc) && n != 2 && (n >= 0 || n < -3)) {
|
|
if (n < 0) n = -n-1;
|
|
rb_raise(rb_eTypeError, "default_proc takes two arguments (2 for %d)", n);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* Hash.new -> new_hash
|
|
* Hash.new(obj) -> new_hash
|
|
* Hash.new {|hash, key| block } -> new_hash
|
|
*
|
|
* Returns a new, empty hash. If this hash is subsequently accessed by
|
|
* a key that doesn't correspond to a hash entry, the value returned
|
|
* depends on the style of <code>new</code> used to create the hash. In
|
|
* the first form, the access returns <code>nil</code>. If
|
|
* <i>obj</i> is specified, this single object will be used for
|
|
* all <em>default values</em>. If a block is specified, it will be
|
|
* called with the hash object and the key, and should return the
|
|
* default value. It is the block's responsibility to store the value
|
|
* in the hash if required.
|
|
*
|
|
* h = Hash.new("Go Fish")
|
|
* h["a"] = 100
|
|
* h["b"] = 200
|
|
* h["a"] #=> 100
|
|
* h["c"] #=> "Go Fish"
|
|
* # The following alters the single default object
|
|
* h["c"].upcase! #=> "GO FISH"
|
|
* h["d"] #=> "GO FISH"
|
|
* h.keys #=> ["a", "b"]
|
|
*
|
|
* # While this creates a new default object each time
|
|
* h = Hash.new { |hash, key| hash[key] = "Go Fish: #{key}" }
|
|
* h["c"] #=> "Go Fish: c"
|
|
* h["c"].upcase! #=> "GO FISH: C"
|
|
* h["d"] #=> "Go Fish: d"
|
|
* h.keys #=> ["c", "d"]
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_initialize(int argc, VALUE *argv, VALUE hash)
|
|
{
|
|
VALUE ifnone;
|
|
|
|
rb_hash_modify(hash);
|
|
if (rb_block_given_p()) {
|
|
rb_check_arity(argc, 0, 0);
|
|
ifnone = rb_block_proc();
|
|
default_proc_arity_check(ifnone);
|
|
RHASH_SET_IFNONE(hash, ifnone);
|
|
FL_SET(hash, HASH_PROC_DEFAULT);
|
|
}
|
|
else {
|
|
rb_check_arity(argc, 0, 1);
|
|
ifnone = argc == 0 ? Qnil : argv[0];
|
|
RHASH_SET_IFNONE(hash, ifnone);
|
|
}
|
|
|
|
return hash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* Hash[ key, value, ... ] -> new_hash
|
|
* Hash[ [ [key, value], ... ] ] -> new_hash
|
|
* Hash[ object ] -> new_hash
|
|
*
|
|
* Creates a new hash populated with the given objects.
|
|
*
|
|
* Similar to the literal <code>{ _key_ => _value_, ... }</code>. In the first
|
|
* form, keys and values occur in pairs, so there must be an even number of
|
|
* arguments.
|
|
*
|
|
* The second and third form take a single argument which is either an array
|
|
* of key-value pairs or an object convertible to a hash.
|
|
*
|
|
* Hash["a", 100, "b", 200] #=> {"a"=>100, "b"=>200}
|
|
* Hash[ [ ["a", 100], ["b", 200] ] ] #=> {"a"=>100, "b"=>200}
|
|
* Hash["a" => 100, "b" => 200] #=> {"a"=>100, "b"=>200}
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_s_create(int argc, VALUE *argv, VALUE klass)
|
|
{
|
|
VALUE hash, tmp;
|
|
int i;
|
|
|
|
if (argc == 1) {
|
|
tmp = rb_hash_s_try_convert(Qnil, argv[0]);
|
|
if (!NIL_P(tmp)) {
|
|
hash = hash_alloc(klass);
|
|
if (RHASH(tmp)->ntbl) {
|
|
RHASH(hash)->ntbl = st_copy(RHASH(tmp)->ntbl);
|
|
}
|
|
return hash;
|
|
}
|
|
|
|
tmp = rb_check_array_type(argv[0]);
|
|
if (!NIL_P(tmp)) {
|
|
long i;
|
|
|
|
hash = hash_alloc(klass);
|
|
for (i = 0; i < RARRAY_LEN(tmp); ++i) {
|
|
VALUE e = RARRAY_AREF(tmp, i);
|
|
VALUE v = rb_check_array_type(e);
|
|
VALUE key, val = Qnil;
|
|
|
|
if (NIL_P(v)) {
|
|
#if 0 /* refix in the next release */
|
|
rb_raise(rb_eArgError, "wrong element type %s at %ld (expected array)",
|
|
rb_builtin_class_name(e), i);
|
|
|
|
#else
|
|
rb_warn("wrong element type %s at %ld (expected array)",
|
|
rb_builtin_class_name(e), i);
|
|
rb_warn("ignoring wrong elements is deprecated, remove them explicitly");
|
|
rb_warn("this causes ArgumentError in the next release");
|
|
continue;
|
|
#endif
|
|
}
|
|
switch (RARRAY_LEN(v)) {
|
|
default:
|
|
rb_raise(rb_eArgError, "invalid number of elements (%ld for 1..2)",
|
|
RARRAY_LEN(v));
|
|
case 2:
|
|
val = RARRAY_AREF(v, 1);
|
|
case 1:
|
|
key = RARRAY_AREF(v, 0);
|
|
rb_hash_aset(hash, key, val);
|
|
}
|
|
}
|
|
return hash;
|
|
}
|
|
}
|
|
if (argc % 2 != 0) {
|
|
rb_raise(rb_eArgError, "odd number of arguments for Hash");
|
|
}
|
|
|
|
hash = hash_alloc(klass);
|
|
for (i=0; i<argc; i+=2) {
|
|
rb_hash_aset(hash, argv[i], argv[i + 1]);
|
|
}
|
|
|
|
return hash;
|
|
}
|
|
|
|
static VALUE
|
|
to_hash(VALUE hash)
|
|
{
|
|
return rb_convert_type(hash, T_HASH, "Hash", "to_hash");
|
|
}
|
|
|
|
VALUE
|
|
rb_check_hash_type(VALUE hash)
|
|
{
|
|
return rb_check_convert_type(hash, T_HASH, "Hash", "to_hash");
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* Hash.try_convert(obj) -> hash or nil
|
|
*
|
|
* Try to convert <i>obj</i> into a hash, using to_hash method.
|
|
* Returns converted hash or nil if <i>obj</i> cannot be converted
|
|
* for any reason.
|
|
*
|
|
* Hash.try_convert({1=>2}) # => {1=>2}
|
|
* Hash.try_convert("1=>2") # => nil
|
|
*/
|
|
static VALUE
|
|
rb_hash_s_try_convert(VALUE dummy, VALUE hash)
|
|
{
|
|
return rb_check_hash_type(hash);
|
|
}
|
|
|
|
struct rehash_arg {
|
|
VALUE hash;
|
|
st_table *tbl;
|
|
};
|
|
|
|
static int
|
|
rb_hash_rehash_i(VALUE key, VALUE value, VALUE arg)
|
|
{
|
|
st_table *tbl = (st_table *)arg;
|
|
|
|
st_insert(tbl, (st_data_t)key, (st_data_t)value);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.rehash -> hsh
|
|
*
|
|
* Rebuilds the hash based on the current hash values for each key. If
|
|
* values of key objects have changed since they were inserted, this
|
|
* method will reindex <i>hsh</i>. If <code>Hash#rehash</code> is
|
|
* called while an iterator is traversing the hash, an
|
|
* <code>RuntimeError</code> will be raised in the iterator.
|
|
*
|
|
* a = [ "a", "b" ]
|
|
* c = [ "c", "d" ]
|
|
* h = { a => 100, c => 300 }
|
|
* h[a] #=> 100
|
|
* a[0] = "z"
|
|
* h[a] #=> nil
|
|
* h.rehash #=> {["z", "b"]=>100, ["c", "d"]=>300}
|
|
* h[a] #=> 100
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_rehash(VALUE hash)
|
|
{
|
|
VALUE tmp;
|
|
st_table *tbl;
|
|
|
|
if (RHASH_ITER_LEV(hash) > 0) {
|
|
rb_raise(rb_eRuntimeError, "rehash during iteration");
|
|
}
|
|
rb_hash_modify_check(hash);
|
|
if (!RHASH(hash)->ntbl)
|
|
return hash;
|
|
tmp = hash_alloc(0);
|
|
tbl = st_init_table_with_size(RHASH(hash)->ntbl->type, RHASH(hash)->ntbl->num_entries);
|
|
RHASH(tmp)->ntbl = tbl;
|
|
|
|
rb_hash_foreach(hash, rb_hash_rehash_i, (VALUE)tbl);
|
|
st_free_table(RHASH(hash)->ntbl);
|
|
RHASH(hash)->ntbl = tbl;
|
|
RHASH(tmp)->ntbl = 0;
|
|
|
|
return hash;
|
|
}
|
|
|
|
static VALUE
|
|
hash_default_value(VALUE hash, VALUE key)
|
|
{
|
|
if (rb_method_basic_definition_p(CLASS_OF(hash), id_default)) {
|
|
VALUE ifnone = RHASH_IFNONE(hash);
|
|
if (!FL_TEST(hash, HASH_PROC_DEFAULT)) return ifnone;
|
|
if (key == Qundef) return Qnil;
|
|
return rb_funcall(ifnone, id_yield, 2, hash, key);
|
|
}
|
|
else {
|
|
return rb_funcall(hash, id_default, 1, key);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh[key] -> value
|
|
*
|
|
* Element Reference---Retrieves the <i>value</i> object corresponding
|
|
* to the <i>key</i> object. If not found, returns the default value (see
|
|
* <code>Hash::new</code> for details).
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h["a"] #=> 100
|
|
* h["c"] #=> nil
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_aref(VALUE hash, VALUE key)
|
|
{
|
|
st_data_t val;
|
|
|
|
if (!RHASH(hash)->ntbl || !st_lookup(RHASH(hash)->ntbl, key, &val)) {
|
|
return hash_default_value(hash, key);
|
|
}
|
|
return (VALUE)val;
|
|
}
|
|
|
|
VALUE
|
|
rb_hash_lookup2(VALUE hash, VALUE key, VALUE def)
|
|
{
|
|
st_data_t val;
|
|
|
|
if (!RHASH(hash)->ntbl || !st_lookup(RHASH(hash)->ntbl, key, &val)) {
|
|
return def; /* without Hash#default */
|
|
}
|
|
return (VALUE)val;
|
|
}
|
|
|
|
VALUE
|
|
rb_hash_lookup(VALUE hash, VALUE key)
|
|
{
|
|
return rb_hash_lookup2(hash, key, Qnil);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.fetch(key [, default] ) -> obj
|
|
* hsh.fetch(key) {| key | block } -> obj
|
|
*
|
|
* Returns a value from the hash for the given key. If the key can't be
|
|
* found, there are several options: With no other arguments, it will
|
|
* raise an <code>KeyError</code> exception; if <i>default</i> is
|
|
* given, then that will be returned; if the optional code block is
|
|
* specified, then that will be run and its result returned.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h.fetch("a") #=> 100
|
|
* h.fetch("z", "go fish") #=> "go fish"
|
|
* h.fetch("z") { |el| "go fish, #{el}"} #=> "go fish, z"
|
|
*
|
|
* The following example shows that an exception is raised if the key
|
|
* is not found and a default value is not supplied.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h.fetch("z")
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* prog.rb:2:in `fetch': key not found (KeyError)
|
|
* from prog.rb:2
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_fetch_m(int argc, VALUE *argv, VALUE hash)
|
|
{
|
|
VALUE key;
|
|
st_data_t val;
|
|
long block_given;
|
|
|
|
rb_check_arity(argc, 1, 2);
|
|
key = argv[0];
|
|
|
|
block_given = rb_block_given_p();
|
|
if (block_given && argc == 2) {
|
|
rb_warn("block supersedes default value argument");
|
|
}
|
|
if (!RHASH(hash)->ntbl || !st_lookup(RHASH(hash)->ntbl, key, &val)) {
|
|
if (block_given) return rb_yield(key);
|
|
if (argc == 1) {
|
|
volatile VALUE desc = rb_protect(rb_inspect, key, 0);
|
|
if (NIL_P(desc)) {
|
|
desc = rb_any_to_s(key);
|
|
}
|
|
desc = rb_str_ellipsize(desc, 65);
|
|
rb_raise(rb_eKeyError, "key not found: %"PRIsVALUE, desc);
|
|
}
|
|
return argv[1];
|
|
}
|
|
return (VALUE)val;
|
|
}
|
|
|
|
VALUE
|
|
rb_hash_fetch(VALUE hash, VALUE key)
|
|
{
|
|
return rb_hash_fetch_m(1, &key, hash);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.default(key=nil) -> obj
|
|
*
|
|
* Returns the default value, the value that would be returned by
|
|
* <i>hsh</i>[<i>key</i>] if <i>key</i> did not exist in <i>hsh</i>.
|
|
* See also <code>Hash::new</code> and <code>Hash#default=</code>.
|
|
*
|
|
* h = Hash.new #=> {}
|
|
* h.default #=> nil
|
|
* h.default(2) #=> nil
|
|
*
|
|
* h = Hash.new("cat") #=> {}
|
|
* h.default #=> "cat"
|
|
* h.default(2) #=> "cat"
|
|
*
|
|
* h = Hash.new {|h,k| h[k] = k.to_i*10} #=> {}
|
|
* h.default #=> nil
|
|
* h.default(2) #=> 20
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_default(int argc, VALUE *argv, VALUE hash)
|
|
{
|
|
VALUE key, ifnone;
|
|
|
|
rb_check_arity(argc, 0, 1);
|
|
key = argv[0];
|
|
ifnone = RHASH_IFNONE(hash);
|
|
if (FL_TEST(hash, HASH_PROC_DEFAULT)) {
|
|
if (argc == 0) return Qnil;
|
|
return rb_funcall(ifnone, id_yield, 2, hash, key);
|
|
}
|
|
return ifnone;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.default = obj -> obj
|
|
*
|
|
* Sets the default value, the value returned for a key that does not
|
|
* exist in the hash. It is not possible to set the default to a
|
|
* <code>Proc</code> that will be executed on each key lookup.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h.default = "Go fish"
|
|
* h["a"] #=> 100
|
|
* h["z"] #=> "Go fish"
|
|
* # This doesn't do what you might hope...
|
|
* h.default = proc do |hash, key|
|
|
* hash[key] = key + key
|
|
* end
|
|
* h[2] #=> #<Proc:0x401b3948@-:6>
|
|
* h["cat"] #=> #<Proc:0x401b3948@-:6>
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_set_default(VALUE hash, VALUE ifnone)
|
|
{
|
|
rb_hash_modify_check(hash);
|
|
RHASH_SET_IFNONE(hash, ifnone);
|
|
FL_UNSET(hash, HASH_PROC_DEFAULT);
|
|
return ifnone;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.default_proc -> anObject
|
|
*
|
|
* If <code>Hash::new</code> was invoked with a block, return that
|
|
* block, otherwise return <code>nil</code>.
|
|
*
|
|
* h = Hash.new {|h,k| h[k] = k*k } #=> {}
|
|
* p = h.default_proc #=> #<Proc:0x401b3d08@-:1>
|
|
* a = [] #=> []
|
|
* p.call(a, 2)
|
|
* a #=> [nil, nil, 4]
|
|
*/
|
|
|
|
|
|
static VALUE
|
|
rb_hash_default_proc(VALUE hash)
|
|
{
|
|
if (FL_TEST(hash, HASH_PROC_DEFAULT)) {
|
|
return RHASH_IFNONE(hash);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.default_proc = proc_obj or nil
|
|
*
|
|
* Sets the default proc to be executed on each failed key lookup.
|
|
*
|
|
* h.default_proc = proc do |hash, key|
|
|
* hash[key] = key + key
|
|
* end
|
|
* h[2] #=> 4
|
|
* h["cat"] #=> "catcat"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_set_default_proc(VALUE hash, VALUE proc)
|
|
{
|
|
VALUE b;
|
|
|
|
rb_hash_modify_check(hash);
|
|
if (NIL_P(proc)) {
|
|
FL_UNSET(hash, HASH_PROC_DEFAULT);
|
|
RHASH_SET_IFNONE(hash, proc);
|
|
return proc;
|
|
}
|
|
b = rb_check_convert_type(proc, T_DATA, "Proc", "to_proc");
|
|
if (NIL_P(b) || !rb_obj_is_proc(b)) {
|
|
rb_raise(rb_eTypeError,
|
|
"wrong default_proc type %s (expected Proc)",
|
|
rb_obj_classname(proc));
|
|
}
|
|
proc = b;
|
|
default_proc_arity_check(proc);
|
|
RHASH_SET_IFNONE(hash, proc);
|
|
FL_SET(hash, HASH_PROC_DEFAULT);
|
|
return proc;
|
|
}
|
|
|
|
static int
|
|
key_i(VALUE key, VALUE value, VALUE arg)
|
|
{
|
|
VALUE *args = (VALUE *)arg;
|
|
|
|
if (rb_equal(value, args[0])) {
|
|
args[1] = key;
|
|
return ST_STOP;
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.key(value) -> key
|
|
*
|
|
* Returns the key of an occurrence of a given value. If the value is
|
|
* not found, returns <code>nil</code>.
|
|
*
|
|
* h = { "a" => 100, "b" => 200, "c" => 300, "d" => 300 }
|
|
* h.key(200) #=> "b"
|
|
* h.key(300) #=> "c"
|
|
* h.key(999) #=> nil
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_key(VALUE hash, VALUE value)
|
|
{
|
|
VALUE args[2];
|
|
|
|
args[0] = value;
|
|
args[1] = Qnil;
|
|
|
|
rb_hash_foreach(hash, key_i, (VALUE)args);
|
|
|
|
return args[1];
|
|
}
|
|
|
|
/* :nodoc: */
|
|
static VALUE
|
|
rb_hash_index(VALUE hash, VALUE value)
|
|
{
|
|
rb_warn("Hash#index is deprecated; use Hash#key");
|
|
return rb_hash_key(hash, value);
|
|
}
|
|
|
|
static VALUE
|
|
rb_hash_delete_key(VALUE hash, VALUE key)
|
|
{
|
|
st_data_t ktmp = (st_data_t)key, val;
|
|
|
|
if (!RHASH(hash)->ntbl)
|
|
return Qundef;
|
|
if (RHASH_ITER_LEV(hash) > 0) {
|
|
if (st_delete_safe(RHASH(hash)->ntbl, &ktmp, &val, (st_data_t)Qundef)) {
|
|
FL_SET(hash, HASH_DELETED);
|
|
return (VALUE)val;
|
|
}
|
|
}
|
|
else if (st_delete(RHASH(hash)->ntbl, &ktmp, &val))
|
|
return (VALUE)val;
|
|
return Qundef;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.delete(key) -> value
|
|
* hsh.delete(key) {| key | block } -> value
|
|
*
|
|
* Deletes the key-value pair and returns the value from <i>hsh</i> whose
|
|
* key is equal to <i>key</i>. If the key is not found, returns the
|
|
* <em>default value</em>. If the optional code block is given and the
|
|
* key is not found, pass in the key and return the result of
|
|
* <i>block</i>.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h.delete("a") #=> 100
|
|
* h.delete("z") #=> nil
|
|
* h.delete("z") { |el| "#{el} not found" } #=> "z not found"
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_delete(VALUE hash, VALUE key)
|
|
{
|
|
VALUE val;
|
|
|
|
rb_hash_modify_check(hash);
|
|
val = rb_hash_delete_key(hash, key);
|
|
if (val != Qundef) return val;
|
|
if (rb_block_given_p()) {
|
|
return rb_yield(key);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
struct shift_var {
|
|
VALUE key;
|
|
VALUE val;
|
|
};
|
|
|
|
static int
|
|
shift_i_safe(VALUE key, VALUE value, VALUE arg)
|
|
{
|
|
struct shift_var *var = (struct shift_var *)arg;
|
|
|
|
var->key = key;
|
|
var->val = value;
|
|
return ST_STOP;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.shift -> anArray or obj
|
|
*
|
|
* Removes a key-value pair from <i>hsh</i> and returns it as the
|
|
* two-item array <code>[</code> <i>key, value</i> <code>]</code>, or
|
|
* the hash's default value if the hash is empty.
|
|
*
|
|
* h = { 1 => "a", 2 => "b", 3 => "c" }
|
|
* h.shift #=> [1, "a"]
|
|
* h #=> {2=>"b", 3=>"c"}
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_shift(VALUE hash)
|
|
{
|
|
struct shift_var var;
|
|
|
|
rb_hash_modify_check(hash);
|
|
if (RHASH(hash)->ntbl) {
|
|
var.key = Qundef;
|
|
if (RHASH_ITER_LEV(hash) == 0) {
|
|
if (st_shift(RHASH(hash)->ntbl, &var.key, &var.val)) {
|
|
return rb_assoc_new(var.key, var.val);
|
|
}
|
|
}
|
|
else {
|
|
rb_hash_foreach(hash, shift_i_safe, (VALUE)&var);
|
|
if (var.key != Qundef) {
|
|
rb_hash_delete_key(hash, var.key);
|
|
return rb_assoc_new(var.key, var.val);
|
|
}
|
|
}
|
|
}
|
|
return hash_default_value(hash, Qnil);
|
|
}
|
|
|
|
static int
|
|
delete_if_i(VALUE key, VALUE value, VALUE hash)
|
|
{
|
|
if (RTEST(rb_yield_values(2, key, value))) {
|
|
return ST_DELETE;
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static VALUE
|
|
hash_enum_size(VALUE hash, VALUE args, VALUE eobj)
|
|
{
|
|
return rb_hash_size(hash);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.delete_if {| key, value | block } -> hsh
|
|
* hsh.delete_if -> an_enumerator
|
|
*
|
|
* Deletes every key-value pair from <i>hsh</i> for which <i>block</i>
|
|
* evaluates to <code>true</code>.
|
|
*
|
|
* If no block is given, an enumerator is returned instead.
|
|
*
|
|
* h = { "a" => 100, "b" => 200, "c" => 300 }
|
|
* h.delete_if {|key, value| key >= "b" } #=> {"a"=>100}
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_delete_if(VALUE hash)
|
|
{
|
|
RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
|
|
rb_hash_modify_check(hash);
|
|
if (RHASH(hash)->ntbl)
|
|
rb_hash_foreach(hash, delete_if_i, hash);
|
|
return hash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.reject! {| key, value | block } -> hsh or nil
|
|
* hsh.reject! -> an_enumerator
|
|
*
|
|
* Equivalent to <code>Hash#delete_if</code>, but returns
|
|
* <code>nil</code> if no changes were made.
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_reject_bang(VALUE hash)
|
|
{
|
|
st_index_t n;
|
|
|
|
RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
|
|
rb_hash_modify(hash);
|
|
n = RHASH_SIZE(hash);
|
|
if (!n) return Qnil;
|
|
rb_hash_foreach(hash, delete_if_i, hash);
|
|
if (n == RHASH(hash)->ntbl->num_entries) return Qnil;
|
|
return hash;
|
|
}
|
|
|
|
static int
|
|
reject_i(VALUE key, VALUE value, VALUE result)
|
|
{
|
|
if (!RTEST(rb_yield_values(2, key, value))) {
|
|
rb_hash_aset(result, key, value);
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.reject {|key, value| block} -> a_hash
|
|
* hsh.reject -> an_enumerator
|
|
*
|
|
* Returns a new hash consisting of entries for which the block returns false.
|
|
*
|
|
* If no block is given, an enumerator is returned instead.
|
|
*
|
|
* h = { "a" => 100, "b" => 200, "c" => 300 }
|
|
* h.reject {|k,v| k < "b"} #=> {"b" => 200, "c" => 300}
|
|
* h.reject {|k,v| v > 100} #=> {"a" => 100}
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_reject(VALUE hash)
|
|
{
|
|
VALUE result;
|
|
|
|
RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
|
|
if (RTEST(ruby_verbose)) {
|
|
VALUE klass;
|
|
if (HAS_EXTRA_STATES(hash, klass)) {
|
|
rb_warn("extra states are no longer copied: %+"PRIsVALUE, hash);
|
|
}
|
|
}
|
|
result = rb_hash_new();
|
|
if (!RHASH_EMPTY_P(hash)) {
|
|
rb_hash_foreach(hash, reject_i, result);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.values_at(key, ...) -> array
|
|
*
|
|
* Return an array containing the values associated with the given keys.
|
|
* Also see <code>Hash.select</code>.
|
|
*
|
|
* h = { "cat" => "feline", "dog" => "canine", "cow" => "bovine" }
|
|
* h.values_at("cow", "cat") #=> ["bovine", "feline"]
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_values_at(int argc, VALUE *argv, VALUE hash)
|
|
{
|
|
VALUE result = rb_ary_new2(argc);
|
|
long i;
|
|
|
|
for (i=0; i<argc; i++) {
|
|
rb_ary_push(result, rb_hash_aref(hash, argv[i]));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
select_i(VALUE key, VALUE value, VALUE result)
|
|
{
|
|
if (RTEST(rb_yield_values(2, key, value))) {
|
|
rb_hash_aset(result, key, value);
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.select {|key, value| block} -> a_hash
|
|
* hsh.select -> an_enumerator
|
|
*
|
|
* Returns a new hash consisting of entries for which the block returns true.
|
|
*
|
|
* If no block is given, an enumerator is returned instead.
|
|
*
|
|
* h = { "a" => 100, "b" => 200, "c" => 300 }
|
|
* h.select {|k,v| k > "a"} #=> {"b" => 200, "c" => 300}
|
|
* h.select {|k,v| v < 200} #=> {"a" => 100}
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_select(VALUE hash)
|
|
{
|
|
VALUE result;
|
|
|
|
RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
|
|
result = rb_hash_new();
|
|
if (!RHASH_EMPTY_P(hash)) {
|
|
rb_hash_foreach(hash, select_i, result);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
keep_if_i(VALUE key, VALUE value, VALUE hash)
|
|
{
|
|
if (!RTEST(rb_yield_values(2, key, value))) {
|
|
return ST_DELETE;
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.select! {| key, value | block } -> hsh or nil
|
|
* hsh.select! -> an_enumerator
|
|
*
|
|
* Equivalent to <code>Hash#keep_if</code>, but returns
|
|
* <code>nil</code> if no changes were made.
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_select_bang(VALUE hash)
|
|
{
|
|
st_index_t n;
|
|
|
|
RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
|
|
rb_hash_modify_check(hash);
|
|
if (!RHASH(hash)->ntbl)
|
|
return Qnil;
|
|
n = RHASH(hash)->ntbl->num_entries;
|
|
rb_hash_foreach(hash, keep_if_i, hash);
|
|
if (n == RHASH(hash)->ntbl->num_entries) return Qnil;
|
|
return hash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.keep_if {| key, value | block } -> hsh
|
|
* hsh.keep_if -> an_enumerator
|
|
*
|
|
* Deletes every key-value pair from <i>hsh</i> for which <i>block</i>
|
|
* evaluates to false.
|
|
*
|
|
* If no block is given, an enumerator is returned instead.
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_keep_if(VALUE hash)
|
|
{
|
|
RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
|
|
rb_hash_modify_check(hash);
|
|
if (RHASH(hash)->ntbl)
|
|
rb_hash_foreach(hash, keep_if_i, hash);
|
|
return hash;
|
|
}
|
|
|
|
static int
|
|
clear_i(VALUE key, VALUE value, VALUE dummy)
|
|
{
|
|
return ST_DELETE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.clear -> hsh
|
|
*
|
|
* Removes all key-value pairs from <i>hsh</i>.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 } #=> {"a"=>100, "b"=>200}
|
|
* h.clear #=> {}
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_clear(VALUE hash)
|
|
{
|
|
rb_hash_modify_check(hash);
|
|
if (!RHASH(hash)->ntbl)
|
|
return hash;
|
|
if (RHASH(hash)->ntbl->num_entries > 0) {
|
|
if (RHASH_ITER_LEV(hash) > 0)
|
|
rb_hash_foreach(hash, clear_i, 0);
|
|
else
|
|
st_clear(RHASH(hash)->ntbl);
|
|
}
|
|
|
|
return hash;
|
|
}
|
|
|
|
static int
|
|
hash_aset(st_data_t *key, st_data_t *val, struct update_arg *arg, int existing)
|
|
{
|
|
if (existing) {
|
|
arg->new_value = arg->arg;
|
|
arg->old_value = *val;
|
|
}
|
|
else {
|
|
arg->new_key = *key;
|
|
arg->new_value = arg->arg;
|
|
}
|
|
*val = arg->arg;
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static int
|
|
hash_aset_str(st_data_t *key, st_data_t *val, struct update_arg *arg, int existing)
|
|
{
|
|
if (!existing) {
|
|
*key = rb_str_new_frozen(*key);
|
|
}
|
|
return hash_aset(key, val, arg, existing);
|
|
}
|
|
|
|
NOINSERT_UPDATE_CALLBACK(hash_aset);
|
|
NOINSERT_UPDATE_CALLBACK(hash_aset_str);
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh[key] = value -> value
|
|
* hsh.store(key, value) -> value
|
|
*
|
|
* == Element Assignment
|
|
*
|
|
* Associates the value given by +value+ with the key given by +key+.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h["a"] = 9
|
|
* h["c"] = 4
|
|
* h #=> {"a"=>9, "b"=>200, "c"=>4}
|
|
* h.store("d", 42) #=> 42
|
|
* h #=> {"a"=>9, "b"=>200, "c"=>4, "d"=>42}
|
|
*
|
|
* +key+ should not have its value changed while it is in use as a key (an
|
|
* <tt>unfrozen String</tt> passed as a key will be duplicated and frozen).
|
|
*
|
|
* a = "a"
|
|
* b = "b".freeze
|
|
* h = { a => 100, b => 200 }
|
|
* h.key(100).equal? a #=> false
|
|
* h.key(200).equal? b #=> true
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_aset(VALUE hash, VALUE key, VALUE val)
|
|
{
|
|
int iter_lev = RHASH_ITER_LEV(hash);
|
|
st_table *tbl = RHASH(hash)->ntbl;
|
|
|
|
rb_hash_modify(hash);
|
|
if (!tbl) {
|
|
if (iter_lev > 0) no_new_key();
|
|
tbl = hash_tbl(hash);
|
|
}
|
|
if (tbl->type == &identhash || rb_obj_class(key) != rb_cString) {
|
|
RHASH_UPDATE_ITER(hash, iter_lev, key, hash_aset, val);
|
|
}
|
|
else {
|
|
RHASH_UPDATE_ITER(hash, iter_lev, key, hash_aset_str, val);
|
|
}
|
|
return val;
|
|
}
|
|
|
|
static int
|
|
replace_i(VALUE key, VALUE val, VALUE hash)
|
|
{
|
|
rb_hash_aset(hash, key, val);
|
|
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/* :nodoc: */
|
|
static VALUE
|
|
rb_hash_initialize_copy(VALUE hash, VALUE hash2)
|
|
{
|
|
st_table *ntbl;
|
|
|
|
rb_hash_modify_check(hash);
|
|
hash2 = to_hash(hash2);
|
|
|
|
Check_Type(hash2, T_HASH);
|
|
|
|
if (hash == hash2) return hash;
|
|
|
|
ntbl = RHASH(hash)->ntbl;
|
|
if (RHASH(hash2)->ntbl) {
|
|
if (ntbl) st_free_table(ntbl);
|
|
RHASH(hash)->ntbl = st_copy(RHASH(hash2)->ntbl);
|
|
if (RHASH(hash)->ntbl->num_entries)
|
|
rb_hash_rehash(hash);
|
|
}
|
|
else if (ntbl) {
|
|
st_clear(ntbl);
|
|
}
|
|
|
|
if (FL_TEST(hash2, HASH_PROC_DEFAULT)) {
|
|
FL_SET(hash, HASH_PROC_DEFAULT);
|
|
}
|
|
else {
|
|
FL_UNSET(hash, HASH_PROC_DEFAULT);
|
|
}
|
|
RHASH_SET_IFNONE(hash, RHASH_IFNONE(hash2));
|
|
|
|
return hash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.replace(other_hash) -> hsh
|
|
*
|
|
* Replaces the contents of <i>hsh</i> with the contents of
|
|
* <i>other_hash</i>.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h.replace({ "c" => 300, "d" => 400 }) #=> {"c"=>300, "d"=>400}
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_replace(VALUE hash, VALUE hash2)
|
|
{
|
|
st_table *table2;
|
|
|
|
rb_hash_modify_check(hash);
|
|
if (hash == hash2) return hash;
|
|
hash2 = to_hash(hash2);
|
|
|
|
RHASH_SET_IFNONE(hash, RHASH_IFNONE(hash2));
|
|
if (FL_TEST(hash2, HASH_PROC_DEFAULT))
|
|
FL_SET(hash, HASH_PROC_DEFAULT);
|
|
else
|
|
FL_UNSET(hash, HASH_PROC_DEFAULT);
|
|
|
|
table2 = RHASH(hash2)->ntbl;
|
|
|
|
rb_hash_clear(hash);
|
|
if (table2) hash_tbl(hash)->type = table2->type;
|
|
rb_hash_foreach(hash2, replace_i, hash);
|
|
|
|
return hash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.length -> fixnum
|
|
* hsh.size -> fixnum
|
|
*
|
|
* Returns the number of key-value pairs in the hash.
|
|
*
|
|
* h = { "d" => 100, "a" => 200, "v" => 300, "e" => 400 }
|
|
* h.length #=> 4
|
|
* h.delete("a") #=> 200
|
|
* h.length #=> 3
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_size(VALUE hash)
|
|
{
|
|
return INT2FIX(RHASH_SIZE(hash));
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.empty? -> true or false
|
|
*
|
|
* Returns <code>true</code> if <i>hsh</i> contains no key-value pairs.
|
|
*
|
|
* {}.empty? #=> true
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_empty_p(VALUE hash)
|
|
{
|
|
return RHASH_EMPTY_P(hash) ? Qtrue : Qfalse;
|
|
}
|
|
|
|
static int
|
|
each_value_i(VALUE key, VALUE value)
|
|
{
|
|
rb_yield(value);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.each_value {| value | block } -> hsh
|
|
* hsh.each_value -> an_enumerator
|
|
*
|
|
* Calls <i>block</i> once for each key in <i>hsh</i>, passing the
|
|
* value as a parameter.
|
|
*
|
|
* If no block is given, an enumerator is returned instead.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h.each_value {|value| puts value }
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* 100
|
|
* 200
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_each_value(VALUE hash)
|
|
{
|
|
RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
|
|
rb_hash_foreach(hash, each_value_i, 0);
|
|
return hash;
|
|
}
|
|
|
|
static int
|
|
each_key_i(VALUE key, VALUE value)
|
|
{
|
|
rb_yield(key);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.each_key {| key | block } -> hsh
|
|
* hsh.each_key -> an_enumerator
|
|
*
|
|
* Calls <i>block</i> once for each key in <i>hsh</i>, passing the key
|
|
* as a parameter.
|
|
*
|
|
* If no block is given, an enumerator is returned instead.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h.each_key {|key| puts key }
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* a
|
|
* b
|
|
*/
|
|
static VALUE
|
|
rb_hash_each_key(VALUE hash)
|
|
{
|
|
RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
|
|
rb_hash_foreach(hash, each_key_i, 0);
|
|
return hash;
|
|
}
|
|
|
|
static int
|
|
each_pair_i(VALUE key, VALUE value)
|
|
{
|
|
rb_yield(rb_assoc_new(key, value));
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static int
|
|
each_pair_i_fast(VALUE key, VALUE value)
|
|
{
|
|
rb_yield_values(2, key, value);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.each {| key, value | block } -> hsh
|
|
* hsh.each_pair {| key, value | block } -> hsh
|
|
* hsh.each -> an_enumerator
|
|
* hsh.each_pair -> an_enumerator
|
|
*
|
|
* Calls <i>block</i> once for each key in <i>hsh</i>, passing the key-value
|
|
* pair as parameters.
|
|
*
|
|
* If no block is given, an enumerator is returned instead.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h.each {|key, value| puts "#{key} is #{value}" }
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* a is 100
|
|
* b is 200
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_each_pair(VALUE hash)
|
|
{
|
|
RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
|
|
if (rb_block_arity() > 1)
|
|
rb_hash_foreach(hash, each_pair_i_fast, 0);
|
|
else
|
|
rb_hash_foreach(hash, each_pair_i, 0);
|
|
return hash;
|
|
}
|
|
|
|
static int
|
|
to_a_i(VALUE key, VALUE value, VALUE ary)
|
|
{
|
|
rb_ary_push(ary, rb_assoc_new(key, value));
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.to_a -> array
|
|
*
|
|
* Converts <i>hsh</i> to a nested array of <code>[</code> <i>key,
|
|
* value</i> <code>]</code> arrays.
|
|
*
|
|
* h = { "c" => 300, "a" => 100, "d" => 400, "c" => 300 }
|
|
* h.to_a #=> [["c", 300], ["a", 100], ["d", 400]]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_to_a(VALUE hash)
|
|
{
|
|
VALUE ary;
|
|
|
|
ary = rb_ary_new_capa(RHASH_SIZE(hash));
|
|
rb_hash_foreach(hash, to_a_i, ary);
|
|
OBJ_INFECT(ary, hash);
|
|
|
|
return ary;
|
|
}
|
|
|
|
static int
|
|
inspect_i(VALUE key, VALUE value, VALUE str)
|
|
{
|
|
VALUE str2;
|
|
|
|
str2 = rb_inspect(key);
|
|
if (RSTRING_LEN(str) > 1) {
|
|
rb_str_buf_cat_ascii(str, ", ");
|
|
}
|
|
else {
|
|
rb_enc_copy(str, str2);
|
|
}
|
|
rb_str_buf_append(str, str2);
|
|
OBJ_INFECT(str, str2);
|
|
rb_str_buf_cat_ascii(str, "=>");
|
|
str2 = rb_inspect(value);
|
|
rb_str_buf_append(str, str2);
|
|
OBJ_INFECT(str, str2);
|
|
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static VALUE
|
|
inspect_hash(VALUE hash, VALUE dummy, int recur)
|
|
{
|
|
VALUE str;
|
|
|
|
if (recur) return rb_usascii_str_new2("{...}");
|
|
str = rb_str_buf_new2("{");
|
|
rb_hash_foreach(hash, inspect_i, str);
|
|
rb_str_buf_cat2(str, "}");
|
|
OBJ_INFECT(str, hash);
|
|
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.to_s -> string
|
|
* hsh.inspect -> string
|
|
*
|
|
* Return the contents of this hash as a string.
|
|
*
|
|
* h = { "c" => 300, "a" => 100, "d" => 400, "c" => 300 }
|
|
* h.to_s #=> "{\"c\"=>300, \"a\"=>100, \"d\"=>400}"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_inspect(VALUE hash)
|
|
{
|
|
if (RHASH_EMPTY_P(hash))
|
|
return rb_usascii_str_new2("{}");
|
|
return rb_exec_recursive(inspect_hash, hash, 0);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.to_hash => hsh
|
|
*
|
|
* Returns +self+.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_to_hash(VALUE hash)
|
|
{
|
|
return hash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.to_h -> hsh or new_hash
|
|
*
|
|
* Returns +self+. If called on a subclass of Hash, converts
|
|
* the receiver to a Hash object.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_to_h(VALUE hash)
|
|
{
|
|
if (rb_obj_class(hash) != rb_cHash) {
|
|
VALUE ret = rb_hash_new();
|
|
if (!RHASH_EMPTY_P(hash))
|
|
RHASH(ret)->ntbl = st_copy(RHASH(hash)->ntbl);
|
|
if (FL_TEST(hash, HASH_PROC_DEFAULT)) {
|
|
FL_SET(ret, HASH_PROC_DEFAULT);
|
|
}
|
|
RHASH_SET_IFNONE(ret, RHASH_IFNONE(hash));
|
|
return ret;
|
|
}
|
|
return hash;
|
|
}
|
|
|
|
static int
|
|
keys_i(VALUE key, VALUE value, VALUE ary)
|
|
{
|
|
rb_ary_push(ary, key);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.keys -> array
|
|
*
|
|
* Returns a new array populated with the keys from this hash. See also
|
|
* <code>Hash#values</code>.
|
|
*
|
|
* h = { "a" => 100, "b" => 200, "c" => 300, "d" => 400 }
|
|
* h.keys #=> ["a", "b", "c", "d"]
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_keys(VALUE hash)
|
|
{
|
|
VALUE keys;
|
|
st_index_t size = RHASH_SIZE(hash);
|
|
|
|
keys = rb_ary_new_capa(size);
|
|
if (size == 0) return keys;
|
|
|
|
if (ST_DATA_COMPATIBLE_P(VALUE)) {
|
|
st_table *table = RHASH(hash)->ntbl;
|
|
|
|
rb_gc_writebarrier_remember(keys);
|
|
RARRAY_PTR_USE(keys, ptr, {
|
|
size = st_keys_check(table, ptr, size, Qundef);
|
|
});
|
|
rb_ary_set_len(keys, size);
|
|
}
|
|
else {
|
|
rb_hash_foreach(hash, keys_i, keys);
|
|
}
|
|
|
|
return keys;
|
|
}
|
|
|
|
static int
|
|
values_i(VALUE key, VALUE value, VALUE ary)
|
|
{
|
|
rb_ary_push(ary, value);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.values -> array
|
|
*
|
|
* Returns a new array populated with the values from <i>hsh</i>. See
|
|
* also <code>Hash#keys</code>.
|
|
*
|
|
* h = { "a" => 100, "b" => 200, "c" => 300 }
|
|
* h.values #=> [100, 200, 300]
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_values(VALUE hash)
|
|
{
|
|
VALUE values;
|
|
st_index_t size = RHASH_SIZE(hash);
|
|
|
|
values = rb_ary_new_capa(size);
|
|
if (size == 0) return values;
|
|
|
|
if (ST_DATA_COMPATIBLE_P(VALUE)) {
|
|
st_table *table = RHASH(hash)->ntbl;
|
|
|
|
rb_gc_writebarrier_remember(values);
|
|
RARRAY_PTR_USE(values, ptr, {
|
|
size = st_values_check(table, ptr, size, Qundef);
|
|
});
|
|
rb_ary_set_len(values, size);
|
|
}
|
|
else {
|
|
rb_hash_foreach(hash, values_i, values);
|
|
}
|
|
|
|
return values;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.has_key?(key) -> true or false
|
|
* hsh.include?(key) -> true or false
|
|
* hsh.key?(key) -> true or false
|
|
* hsh.member?(key) -> true or false
|
|
*
|
|
* Returns <code>true</code> if the given key is present in <i>hsh</i>.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h.has_key?("a") #=> true
|
|
* h.has_key?("z") #=> false
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_has_key(VALUE hash, VALUE key)
|
|
{
|
|
if (!RHASH(hash)->ntbl)
|
|
return Qfalse;
|
|
if (st_lookup(RHASH(hash)->ntbl, key, 0)) {
|
|
return Qtrue;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
static int
|
|
rb_hash_search_value(VALUE key, VALUE value, VALUE arg)
|
|
{
|
|
VALUE *data = (VALUE *)arg;
|
|
|
|
if (rb_equal(value, data[1])) {
|
|
data[0] = Qtrue;
|
|
return ST_STOP;
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.has_value?(value) -> true or false
|
|
* hsh.value?(value) -> true or false
|
|
*
|
|
* Returns <code>true</code> if the given value is present for some key
|
|
* in <i>hsh</i>.
|
|
*
|
|
* h = { "a" => 100, "b" => 200 }
|
|
* h.has_value?(100) #=> true
|
|
* h.has_value?(999) #=> false
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_has_value(VALUE hash, VALUE val)
|
|
{
|
|
VALUE data[2];
|
|
|
|
data[0] = Qfalse;
|
|
data[1] = val;
|
|
rb_hash_foreach(hash, rb_hash_search_value, (VALUE)data);
|
|
return data[0];
|
|
}
|
|
|
|
struct equal_data {
|
|
VALUE result;
|
|
st_table *tbl;
|
|
int eql;
|
|
};
|
|
|
|
static int
|
|
eql_i(VALUE key, VALUE val1, VALUE arg)
|
|
{
|
|
struct equal_data *data = (struct equal_data *)arg;
|
|
st_data_t val2;
|
|
|
|
if (!st_lookup(data->tbl, key, &val2)) {
|
|
data->result = Qfalse;
|
|
return ST_STOP;
|
|
}
|
|
if (!(data->eql ? rb_eql(val1, (VALUE)val2) : (int)rb_equal(val1, (VALUE)val2))) {
|
|
data->result = Qfalse;
|
|
return ST_STOP;
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static VALUE
|
|
recursive_eql(VALUE hash, VALUE dt, int recur)
|
|
{
|
|
struct equal_data *data;
|
|
|
|
if (recur) return Qtrue; /* Subtle! */
|
|
data = (struct equal_data*)dt;
|
|
data->result = Qtrue;
|
|
rb_hash_foreach(hash, eql_i, dt);
|
|
|
|
return data->result;
|
|
}
|
|
|
|
static VALUE
|
|
hash_equal(VALUE hash1, VALUE hash2, int eql)
|
|
{
|
|
struct equal_data data;
|
|
|
|
if (hash1 == hash2) return Qtrue;
|
|
if (!RB_TYPE_P(hash2, T_HASH)) {
|
|
if (!rb_respond_to(hash2, idTo_hash)) {
|
|
return Qfalse;
|
|
}
|
|
if (eql)
|
|
return rb_eql(hash2, hash1);
|
|
else
|
|
return rb_equal(hash2, hash1);
|
|
}
|
|
if (RHASH_SIZE(hash1) != RHASH_SIZE(hash2))
|
|
return Qfalse;
|
|
if (!RHASH(hash1)->ntbl || !RHASH(hash2)->ntbl)
|
|
return Qtrue;
|
|
if (RHASH(hash1)->ntbl->type != RHASH(hash2)->ntbl->type)
|
|
return Qfalse;
|
|
#if 0
|
|
if (!(rb_equal(RHASH_IFNONE(hash1), RHASH_IFNONE(hash2)) &&
|
|
FL_TEST(hash1, HASH_PROC_DEFAULT) == FL_TEST(hash2, HASH_PROC_DEFAULT)))
|
|
return Qfalse;
|
|
#endif
|
|
|
|
data.tbl = RHASH(hash2)->ntbl;
|
|
data.eql = eql;
|
|
return rb_exec_recursive_paired(recursive_eql, hash1, hash2, (VALUE)&data);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh == other_hash -> true or false
|
|
*
|
|
* Equality---Two hashes are equal if they each contain the same number
|
|
* of keys and if each key-value pair is equal to (according to
|
|
* <code>Object#==</code>) the corresponding elements in the other
|
|
* hash.
|
|
*
|
|
* h1 = { "a" => 1, "c" => 2 }
|
|
* h2 = { 7 => 35, "c" => 2, "a" => 1 }
|
|
* h3 = { "a" => 1, "c" => 2, 7 => 35 }
|
|
* h4 = { "a" => 1, "d" => 2, "f" => 35 }
|
|
* h1 == h2 #=> false
|
|
* h2 == h3 #=> true
|
|
* h3 == h4 #=> false
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_equal(VALUE hash1, VALUE hash2)
|
|
{
|
|
return hash_equal(hash1, hash2, FALSE);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hash.eql?(other) -> true or false
|
|
*
|
|
* Returns <code>true</code> if <i>hash</i> and <i>other</i> are
|
|
* both hashes with the same content.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_eql(VALUE hash1, VALUE hash2)
|
|
{
|
|
return hash_equal(hash1, hash2, TRUE);
|
|
}
|
|
|
|
static int
|
|
hash_i(VALUE key, VALUE val, VALUE arg)
|
|
{
|
|
st_index_t *hval = (st_index_t *)arg;
|
|
st_index_t hdata[2];
|
|
|
|
hdata[0] = rb_hash(key);
|
|
hdata[1] = rb_hash(val);
|
|
*hval ^= st_hash(hdata, sizeof(hdata), 0);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.hash -> fixnum
|
|
*
|
|
* Compute a hash-code for this hash. Two hashes with the same content
|
|
* will have the same hash code (and will compare using <code>eql?</code>).
|
|
*
|
|
* See also Object#hash.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_hash(VALUE hash)
|
|
{
|
|
st_index_t size = RHASH_SIZE(hash);
|
|
st_index_t hval = rb_hash_start(size);
|
|
hval = rb_hash_uint(hval, (st_index_t)rb_hash_hash);
|
|
if (size) {
|
|
rb_hash_foreach(hash, hash_i, (VALUE)&hval);
|
|
}
|
|
hval = rb_hash_end(hval);
|
|
return INT2FIX(hval);
|
|
}
|
|
|
|
static int
|
|
rb_hash_invert_i(VALUE key, VALUE value, VALUE hash)
|
|
{
|
|
rb_hash_aset(hash, value, key);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.invert -> new_hash
|
|
*
|
|
* Returns a new hash created by using <i>hsh</i>'s values as keys, and
|
|
* the keys as values.
|
|
*
|
|
* h = { "n" => 100, "m" => 100, "y" => 300, "d" => 200, "a" => 0 }
|
|
* h.invert #=> {0=>"a", 100=>"m", 200=>"d", 300=>"y"}
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_invert(VALUE hash)
|
|
{
|
|
VALUE h = rb_hash_new();
|
|
|
|
rb_hash_foreach(hash, rb_hash_invert_i, h);
|
|
return h;
|
|
}
|
|
|
|
static int
|
|
rb_hash_update_callback(st_data_t *key, st_data_t *value, struct update_arg *arg, int existing)
|
|
{
|
|
if (existing) {
|
|
arg->old_value = *value;
|
|
arg->new_value = arg->arg;
|
|
}
|
|
else {
|
|
arg->new_key = *key;
|
|
arg->new_value = arg->arg;
|
|
}
|
|
*value = arg->arg;
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
NOINSERT_UPDATE_CALLBACK(rb_hash_update_callback);
|
|
|
|
static int
|
|
rb_hash_update_i(VALUE key, VALUE value, VALUE hash)
|
|
{
|
|
RHASH_UPDATE(hash, key, rb_hash_update_callback, value);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static int
|
|
rb_hash_update_block_callback(st_data_t *key, st_data_t *value, struct update_arg *arg, int existing)
|
|
{
|
|
VALUE newvalue = (VALUE)arg->arg;
|
|
|
|
if (existing) {
|
|
newvalue = rb_yield_values(3, (VALUE)*key, (VALUE)*value, newvalue);
|
|
arg->old_value = *value;
|
|
arg->new_value = newvalue;
|
|
}
|
|
else {
|
|
arg->new_key = *key;
|
|
arg->new_value = newvalue;
|
|
}
|
|
*value = newvalue;
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
NOINSERT_UPDATE_CALLBACK(rb_hash_update_block_callback);
|
|
|
|
static int
|
|
rb_hash_update_block_i(VALUE key, VALUE value, VALUE hash)
|
|
{
|
|
RHASH_UPDATE(hash, key, rb_hash_update_block_callback, value);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.merge!(other_hash) -> hsh
|
|
* hsh.update(other_hash) -> hsh
|
|
* hsh.merge!(other_hash){|key, oldval, newval| block} -> hsh
|
|
* hsh.update(other_hash){|key, oldval, newval| block} -> hsh
|
|
*
|
|
* Adds the contents of _other_hash_ to _hsh_. If no block is specified,
|
|
* entries with duplicate keys are overwritten with the values from
|
|
* _other_hash_, otherwise the value of each duplicate key is determined by
|
|
* calling the block with the key, its value in _hsh_ and its value in
|
|
* _other_hash_.
|
|
*
|
|
* h1 = { "a" => 100, "b" => 200 }
|
|
* h2 = { "b" => 254, "c" => 300 }
|
|
* h1.merge!(h2) #=> {"a"=>100, "b"=>254, "c"=>300}
|
|
*
|
|
* h1 = { "a" => 100, "b" => 200 }
|
|
* h2 = { "b" => 254, "c" => 300 }
|
|
* h1.merge!(h2) { |key, v1, v2| v1 }
|
|
* #=> {"a"=>100, "b"=>200, "c"=>300}
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_update(VALUE hash1, VALUE hash2)
|
|
{
|
|
rb_hash_modify(hash1);
|
|
hash2 = to_hash(hash2);
|
|
if (rb_block_given_p()) {
|
|
rb_hash_foreach(hash2, rb_hash_update_block_i, hash1);
|
|
}
|
|
else {
|
|
rb_hash_foreach(hash2, rb_hash_update_i, hash1);
|
|
}
|
|
return hash1;
|
|
}
|
|
|
|
struct update_func_arg {
|
|
VALUE hash;
|
|
VALUE value;
|
|
rb_hash_update_func *func;
|
|
};
|
|
|
|
static int
|
|
rb_hash_update_func_callback(st_data_t *key, st_data_t *value, struct update_arg *arg, int existing)
|
|
{
|
|
struct update_func_arg *uf_arg = (struct update_func_arg *)arg->arg;
|
|
VALUE newvalue = uf_arg->value;
|
|
|
|
if (existing) {
|
|
newvalue = (*uf_arg->func)((VALUE)*key, (VALUE)*value, newvalue);
|
|
arg->old_value = *value;
|
|
arg->new_value = newvalue;
|
|
}
|
|
else {
|
|
arg->new_key = *key;
|
|
arg->new_value = newvalue;
|
|
}
|
|
*value = newvalue;
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
NOINSERT_UPDATE_CALLBACK(rb_hash_update_func_callback);
|
|
|
|
static int
|
|
rb_hash_update_func_i(VALUE key, VALUE value, VALUE arg0)
|
|
{
|
|
struct update_func_arg *arg = (struct update_func_arg *)arg0;
|
|
VALUE hash = arg->hash;
|
|
|
|
arg->value = value;
|
|
RHASH_UPDATE(hash, key, rb_hash_update_func_callback, (VALUE)arg);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
VALUE
|
|
rb_hash_update_by(VALUE hash1, VALUE hash2, rb_hash_update_func *func)
|
|
{
|
|
rb_hash_modify(hash1);
|
|
hash2 = to_hash(hash2);
|
|
if (func) {
|
|
struct update_func_arg arg;
|
|
arg.hash = hash1;
|
|
arg.func = func;
|
|
rb_hash_foreach(hash2, rb_hash_update_func_i, (VALUE)&arg);
|
|
}
|
|
else {
|
|
rb_hash_foreach(hash2, rb_hash_update_i, hash1);
|
|
}
|
|
return hash1;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.merge(other_hash) -> new_hash
|
|
* hsh.merge(other_hash){|key, oldval, newval| block} -> new_hash
|
|
*
|
|
* Returns a new hash containing the contents of <i>other_hash</i> and
|
|
* the contents of <i>hsh</i>. If no block is specified, the value for
|
|
* entries with duplicate keys will be that of <i>other_hash</i>. Otherwise
|
|
* the value for each duplicate key is determined by calling the block
|
|
* with the key, its value in <i>hsh</i> and its value in <i>other_hash</i>.
|
|
*
|
|
* h1 = { "a" => 100, "b" => 200 }
|
|
* h2 = { "b" => 254, "c" => 300 }
|
|
* h1.merge(h2) #=> {"a"=>100, "b"=>254, "c"=>300}
|
|
* h1.merge(h2){|key, oldval, newval| newval - oldval}
|
|
* #=> {"a"=>100, "b"=>54, "c"=>300}
|
|
* h1 #=> {"a"=>100, "b"=>200}
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_merge(VALUE hash1, VALUE hash2)
|
|
{
|
|
return rb_hash_update(rb_obj_dup(hash1), hash2);
|
|
}
|
|
|
|
static int
|
|
assoc_cmp(VALUE a, VALUE b)
|
|
{
|
|
return !RTEST(rb_equal(a, b));
|
|
}
|
|
|
|
static VALUE
|
|
lookup2_call(VALUE arg)
|
|
{
|
|
VALUE *args = (VALUE *)arg;
|
|
return rb_hash_lookup2(args[0], args[1], Qundef);
|
|
}
|
|
|
|
struct reset_hash_type_arg {
|
|
VALUE hash;
|
|
const struct st_hash_type *orighash;
|
|
};
|
|
|
|
static VALUE
|
|
reset_hash_type(VALUE arg)
|
|
{
|
|
struct reset_hash_type_arg *p = (struct reset_hash_type_arg *)arg;
|
|
RHASH(p->hash)->ntbl->type = p->orighash;
|
|
return Qundef;
|
|
}
|
|
|
|
static int
|
|
assoc_i(VALUE key, VALUE val, VALUE arg)
|
|
{
|
|
VALUE *args = (VALUE *)arg;
|
|
|
|
if (RTEST(rb_equal(args[0], key))) {
|
|
args[1] = rb_assoc_new(key, val);
|
|
return ST_STOP;
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hash.assoc(obj) -> an_array or nil
|
|
*
|
|
* Searches through the hash comparing _obj_ with the key using <code>==</code>.
|
|
* Returns the key-value pair (two elements array) or +nil+
|
|
* if no match is found. See <code>Array#assoc</code>.
|
|
*
|
|
* h = {"colors" => ["red", "blue", "green"],
|
|
* "letters" => ["a", "b", "c" ]}
|
|
* h.assoc("letters") #=> ["letters", ["a", "b", "c"]]
|
|
* h.assoc("foo") #=> nil
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_assoc(VALUE hash, VALUE key)
|
|
{
|
|
st_table *table;
|
|
const struct st_hash_type *orighash;
|
|
VALUE args[2];
|
|
|
|
if (RHASH_EMPTY_P(hash)) return Qnil;
|
|
table = RHASH(hash)->ntbl;
|
|
orighash = table->type;
|
|
|
|
if (orighash != &identhash) {
|
|
VALUE value;
|
|
struct reset_hash_type_arg ensure_arg;
|
|
struct st_hash_type assochash;
|
|
|
|
assochash.compare = assoc_cmp;
|
|
assochash.hash = orighash->hash;
|
|
table->type = &assochash;
|
|
args[0] = hash;
|
|
args[1] = key;
|
|
ensure_arg.hash = hash;
|
|
ensure_arg.orighash = orighash;
|
|
value = rb_ensure(lookup2_call, (VALUE)&args, reset_hash_type, (VALUE)&ensure_arg);
|
|
if (value != Qundef) return rb_assoc_new(key, value);
|
|
}
|
|
|
|
args[0] = key;
|
|
args[1] = Qnil;
|
|
rb_hash_foreach(hash, assoc_i, (VALUE)args);
|
|
return args[1];
|
|
}
|
|
|
|
static int
|
|
rassoc_i(VALUE key, VALUE val, VALUE arg)
|
|
{
|
|
VALUE *args = (VALUE *)arg;
|
|
|
|
if (RTEST(rb_equal(args[0], val))) {
|
|
args[1] = rb_assoc_new(key, val);
|
|
return ST_STOP;
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hash.rassoc(obj) -> an_array or nil
|
|
*
|
|
* Searches through the hash comparing _obj_ with the value using <code>==</code>.
|
|
* Returns the first key-value pair (two-element array) that matches. See
|
|
* also <code>Array#rassoc</code>.
|
|
*
|
|
* a = {1=> "one", 2 => "two", 3 => "three", "ii" => "two"}
|
|
* a.rassoc("two") #=> [2, "two"]
|
|
* a.rassoc("four") #=> nil
|
|
*/
|
|
|
|
VALUE
|
|
rb_hash_rassoc(VALUE hash, VALUE obj)
|
|
{
|
|
VALUE args[2];
|
|
|
|
args[0] = obj;
|
|
args[1] = Qnil;
|
|
rb_hash_foreach(hash, rassoc_i, (VALUE)args);
|
|
return args[1];
|
|
}
|
|
|
|
static int
|
|
flatten_i(VALUE key, VALUE val, VALUE ary)
|
|
{
|
|
VALUE pair[2];
|
|
|
|
pair[0] = key;
|
|
pair[1] = val;
|
|
rb_ary_cat(ary, pair, 2);
|
|
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hash.flatten -> an_array
|
|
* hash.flatten(level) -> an_array
|
|
*
|
|
* Returns a new array that is a one-dimensional flattening of this
|
|
* hash. That is, for every key or value that is an array, extract
|
|
* its elements into the new array. Unlike Array#flatten, this
|
|
* method does not flatten recursively by default. The optional
|
|
* <i>level</i> argument determines the level of recursion to flatten.
|
|
*
|
|
* a = {1=> "one", 2 => [2,"two"], 3 => "three"}
|
|
* a.flatten # => [1, "one", 2, [2, "two"], 3, "three"]
|
|
* a.flatten(2) # => [1, "one", 2, 2, "two", 3, "three"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_flatten(int argc, VALUE *argv, VALUE hash)
|
|
{
|
|
VALUE ary;
|
|
|
|
if (argc) {
|
|
int level = NUM2INT(*argv);
|
|
if (level == 0) return rb_hash_to_a(hash);
|
|
|
|
ary = rb_ary_new_capa(RHASH_SIZE(hash) * 2);
|
|
rb_hash_foreach(hash, flatten_i, ary);
|
|
if (level - 1 > 0) {
|
|
*argv = INT2FIX(level - 1);
|
|
rb_funcall2(ary, id_flatten_bang, argc, argv);
|
|
}
|
|
else if (level < 0) {
|
|
rb_funcall2(ary, id_flatten_bang, 0, 0);
|
|
}
|
|
}
|
|
else {
|
|
ary = rb_ary_new_capa(RHASH_SIZE(hash) * 2);
|
|
rb_hash_foreach(hash, flatten_i, ary);
|
|
}
|
|
|
|
return ary;
|
|
}
|
|
|
|
static VALUE rb_hash_compare_by_id_p(VALUE hash);
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.compare_by_identity -> hsh
|
|
*
|
|
* Makes <i>hsh</i> compare its keys by their identity, i.e. it
|
|
* will consider exact same objects as same keys.
|
|
*
|
|
* h1 = { "a" => 100, "b" => 200, :c => "c" }
|
|
* h1["a"] #=> 100
|
|
* h1.compare_by_identity
|
|
* h1.compare_by_identity? #=> true
|
|
* h1["a".dup] #=> nil # different objects.
|
|
* h1[:c] #=> "c" # same symbols are all same.
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_compare_by_id(VALUE hash)
|
|
{
|
|
if (rb_hash_compare_by_id_p(hash)) return hash;
|
|
rb_hash_modify(hash);
|
|
RHASH(hash)->ntbl->type = &identhash;
|
|
rb_hash_rehash(hash);
|
|
return hash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.compare_by_identity? -> true or false
|
|
*
|
|
* Returns <code>true</code> if <i>hsh</i> will compare its keys by
|
|
* their identity. Also see <code>Hash#compare_by_identity</code>.
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_compare_by_id_p(VALUE hash)
|
|
{
|
|
if (!RHASH(hash)->ntbl)
|
|
return Qfalse;
|
|
if (RHASH(hash)->ntbl->type == &identhash) {
|
|
return Qtrue;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
static int
|
|
any_p_i(VALUE key, VALUE value, VALUE arg)
|
|
{
|
|
VALUE ret = rb_yield(rb_assoc_new(key, value));
|
|
if (RTEST(ret)) {
|
|
*(VALUE *)arg = Qtrue;
|
|
return ST_STOP;
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static int
|
|
any_p_i_fast(VALUE key, VALUE value, VALUE arg)
|
|
{
|
|
VALUE ret = rb_yield_values(2, key, value);
|
|
if (RTEST(ret)) {
|
|
*(VALUE *)arg = Qtrue;
|
|
return ST_STOP;
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* hsh.any? [{ |(key, value)| block }] -> true or false
|
|
*
|
|
* See also Enumerable#any?
|
|
*/
|
|
|
|
static VALUE
|
|
rb_hash_any_p(VALUE hash)
|
|
{
|
|
VALUE ret = Qfalse;
|
|
|
|
if (RHASH_EMPTY_P(hash)) return Qfalse;
|
|
if (!rb_block_given_p()) {
|
|
/* yields pairs, never false */
|
|
return Qtrue;
|
|
}
|
|
if (rb_block_arity() > 1)
|
|
rb_hash_foreach(hash, any_p_i_fast, (VALUE)&ret);
|
|
else
|
|
rb_hash_foreach(hash, any_p_i, (VALUE)&ret);
|
|
return ret;
|
|
}
|
|
|
|
static int path_tainted = -1;
|
|
|
|
static char **origenviron;
|
|
#ifdef _WIN32
|
|
#define GET_ENVIRON(e) ((e) = rb_w32_get_environ())
|
|
#define FREE_ENVIRON(e) rb_w32_free_environ(e)
|
|
static char **my_environ;
|
|
#undef environ
|
|
#define environ my_environ
|
|
#undef getenv
|
|
static inline char *
|
|
w32_getenv(const char *name)
|
|
{
|
|
static int binary = -1;
|
|
static int locale = -1;
|
|
if (binary < 0) {
|
|
binary = rb_ascii8bit_encindex();
|
|
locale = rb_locale_encindex();
|
|
}
|
|
return locale == binary ? rb_w32_getenv(name) : rb_w32_ugetenv(name);
|
|
}
|
|
#define getenv(n) w32_getenv(n)
|
|
#elif defined(__APPLE__)
|
|
#undef environ
|
|
#define environ (*_NSGetEnviron())
|
|
#define GET_ENVIRON(e) (e)
|
|
#define FREE_ENVIRON(e)
|
|
#else
|
|
extern char **environ;
|
|
#define GET_ENVIRON(e) (e)
|
|
#define FREE_ENVIRON(e)
|
|
#endif
|
|
#ifdef ENV_IGNORECASE
|
|
#define ENVMATCH(s1, s2) (STRCASECMP((s1), (s2)) == 0)
|
|
#define ENVNMATCH(s1, s2, n) (STRNCASECMP((s1), (s2), (n)) == 0)
|
|
#else
|
|
#define ENVMATCH(n1, n2) (strcmp((n1), (n2)) == 0)
|
|
#define ENVNMATCH(s1, s2, n) (memcmp((s1), (s2), (n)) == 0)
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
static VALUE
|
|
env_str_transcode(VALUE str, rb_encoding *enc)
|
|
{
|
|
return rb_str_conv_enc_opts(str, rb_utf8_encoding(), enc,
|
|
ECONV_INVALID_REPLACE | ECONV_UNDEF_REPLACE, Qnil);
|
|
}
|
|
#endif
|
|
|
|
static VALUE
|
|
env_str_new(const char *ptr, long len)
|
|
{
|
|
#ifdef _WIN32
|
|
VALUE str = env_str_transcode(rb_str_new(ptr, len), rb_locale_encoding());
|
|
#else
|
|
VALUE str = rb_locale_str_new(ptr, len);
|
|
#endif
|
|
|
|
rb_obj_freeze(str);
|
|
return str;
|
|
}
|
|
|
|
static VALUE
|
|
env_path_str_new(const char *ptr)
|
|
{
|
|
#ifdef _WIN32
|
|
VALUE str = env_str_transcode(rb_str_new_cstr(ptr), rb_filesystem_encoding());
|
|
#else
|
|
VALUE str = rb_filesystem_str_new_cstr(ptr);
|
|
#endif
|
|
|
|
rb_obj_freeze(str);
|
|
return str;
|
|
}
|
|
|
|
static VALUE
|
|
env_str_new2(const char *ptr)
|
|
{
|
|
if (!ptr) return Qnil;
|
|
return env_str_new(ptr, strlen(ptr));
|
|
}
|
|
|
|
#define get_env_ptr(var, val) \
|
|
(memchr((var = RSTRING_PTR(val)), '\0', RSTRING_LEN(val)) ? \
|
|
rb_raise(rb_eArgError, "bad environment variable " #var) : (void)0)
|
|
|
|
static inline const char *
|
|
env_name(volatile VALUE *s)
|
|
{
|
|
const char *name;
|
|
SafeStringValue(*s);
|
|
get_env_ptr(name, *s);
|
|
return name;
|
|
}
|
|
|
|
#define env_name(s) env_name(&(s))
|
|
|
|
static VALUE
|
|
env_delete(VALUE obj, VALUE name)
|
|
{
|
|
const char *nam, *val;
|
|
|
|
nam = env_name(name);
|
|
val = getenv(nam);
|
|
if (val) {
|
|
VALUE value = env_str_new2(val);
|
|
|
|
ruby_setenv(nam, 0);
|
|
if (ENVMATCH(nam, PATH_ENV)) {
|
|
path_tainted = 0;
|
|
}
|
|
return value;
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.delete(name) -> value
|
|
* ENV.delete(name) { |name| } -> value
|
|
*
|
|
* Deletes the environment variable with +name+ and returns the value of the
|
|
* variable. If a block is given it will be called when the named environment
|
|
* does not exist.
|
|
*/
|
|
static VALUE
|
|
env_delete_m(VALUE obj, VALUE name)
|
|
{
|
|
VALUE val;
|
|
|
|
val = env_delete(obj, name);
|
|
if (NIL_P(val) && rb_block_given_p()) rb_yield(name);
|
|
return val;
|
|
}
|
|
|
|
static int env_path_tainted(const char *);
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV[name] -> value
|
|
*
|
|
* Retrieves the +value+ for environment variable +name+ as a String. Returns
|
|
* +nil+ if the named variable does not exist.
|
|
*/
|
|
static VALUE
|
|
rb_f_getenv(VALUE obj, VALUE name)
|
|
{
|
|
const char *nam, *env;
|
|
|
|
nam = env_name(name);
|
|
env = getenv(nam);
|
|
if (env) {
|
|
if (ENVMATCH(nam, PATH_ENV) && !env_path_tainted(env)) {
|
|
return env_path_str_new(env);
|
|
}
|
|
return env_str_new2(env);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* :yield: missing_name
|
|
* call-seq:
|
|
* ENV.fetch(name) -> value
|
|
* ENV.fetch(name, default) -> value
|
|
* ENV.fetch(name) { |missing_name| ... } -> value
|
|
*
|
|
* Retrieves the environment variable +name+.
|
|
*
|
|
* If the given name does not exist and neither +default+ nor a block a
|
|
* provided an IndexError is raised. If a block is given it is called with
|
|
* the missing name to provide a value. If a default value is given it will
|
|
* be returned when no block is given.
|
|
*/
|
|
static VALUE
|
|
env_fetch(int argc, VALUE *argv)
|
|
{
|
|
VALUE key;
|
|
long block_given;
|
|
const char *nam, *env;
|
|
|
|
rb_check_arity(argc, 1, 2);
|
|
key = argv[0];
|
|
block_given = rb_block_given_p();
|
|
if (block_given && argc == 2) {
|
|
rb_warn("block supersedes default value argument");
|
|
}
|
|
nam = env_name(key);
|
|
env = getenv(nam);
|
|
if (!env) {
|
|
if (block_given) return rb_yield(key);
|
|
if (argc == 1) {
|
|
rb_raise(rb_eKeyError, "key not found: \"%"PRIsVALUE"\"", key);
|
|
}
|
|
return argv[1];
|
|
}
|
|
if (ENVMATCH(nam, PATH_ENV) && !env_path_tainted(env))
|
|
return env_path_str_new(env);
|
|
return env_str_new2(env);
|
|
}
|
|
|
|
static void
|
|
path_tainted_p(const char *path)
|
|
{
|
|
path_tainted = rb_path_check(path)?0:1;
|
|
}
|
|
|
|
static int
|
|
env_path_tainted(const char *path)
|
|
{
|
|
if (path_tainted < 0) {
|
|
path_tainted_p(path);
|
|
}
|
|
return path_tainted;
|
|
}
|
|
|
|
int
|
|
rb_env_path_tainted(void)
|
|
{
|
|
if (path_tainted < 0) {
|
|
path_tainted_p(getenv(PATH_ENV));
|
|
}
|
|
return path_tainted;
|
|
}
|
|
|
|
#if defined(_WIN32) || (defined(HAVE_SETENV) && defined(HAVE_UNSETENV))
|
|
#elif defined __sun
|
|
static int
|
|
in_origenv(const char *str)
|
|
{
|
|
char **env;
|
|
for (env = origenviron; *env; ++env) {
|
|
if (*env == str) return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
#else
|
|
static int
|
|
envix(const char *nam)
|
|
{
|
|
register int i, len = strlen(nam);
|
|
char **env;
|
|
|
|
env = GET_ENVIRON(environ);
|
|
for (i = 0; env[i]; i++) {
|
|
if (ENVNMATCH(env[i],nam,len) && env[i][len] == '=')
|
|
break; /* memcmp must come first to avoid */
|
|
} /* potential SEGV's */
|
|
FREE_ENVIRON(environ);
|
|
return i;
|
|
}
|
|
#endif
|
|
|
|
#if defined(_WIN32)
|
|
static size_t
|
|
getenvsize(const char* p)
|
|
{
|
|
const char* porg = p;
|
|
while (*p++) p += strlen(p) + 1;
|
|
return p - porg + 1;
|
|
}
|
|
static size_t
|
|
getenvblocksize(void)
|
|
{
|
|
return (rb_w32_osver() >= 5) ? 32767 : 5120;
|
|
}
|
|
#endif
|
|
|
|
#if defined(_WIN32) || \
|
|
(defined(__sun) && !(defined(HAVE_SETENV) && defined(HAVE_UNSETENV)))
|
|
|
|
NORETURN(static void invalid_envname(const char *name));
|
|
|
|
static void
|
|
invalid_envname(const char *name)
|
|
{
|
|
rb_syserr_fail_str(EINVAL, rb_sprintf("ruby_setenv(%s)", name));
|
|
}
|
|
|
|
static const char *
|
|
check_envname(const char *name)
|
|
{
|
|
if (strchr(name, '=')) {
|
|
invalid_envname(name);
|
|
}
|
|
return name;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
ruby_setenv(const char *name, const char *value)
|
|
{
|
|
#if defined(_WIN32)
|
|
VALUE buf;
|
|
int failed = 0;
|
|
check_envname(name);
|
|
if (value) {
|
|
char* p = GetEnvironmentStringsA();
|
|
size_t n;
|
|
if (!p) goto fail; /* never happen */
|
|
n = strlen(name) + 2 + strlen(value) + getenvsize(p);
|
|
FreeEnvironmentStringsA(p);
|
|
if (n >= getenvblocksize()) {
|
|
goto fail; /* 2 for '=' & '\0' */
|
|
}
|
|
buf = rb_sprintf("%s=%s", name, value);
|
|
}
|
|
else {
|
|
buf = rb_sprintf("%s=", name);
|
|
}
|
|
failed = putenv(RSTRING_PTR(buf));
|
|
/* even if putenv() failed, clean up and try to delete the
|
|
* variable from the system area. */
|
|
rb_str_resize(buf, 0);
|
|
if (!value || !*value) {
|
|
/* putenv() doesn't handle empty value */
|
|
if (!SetEnvironmentVariable(name, value) &&
|
|
GetLastError() != ERROR_ENVVAR_NOT_FOUND) goto fail;
|
|
}
|
|
if (failed) {
|
|
fail:
|
|
invalid_envname(name);
|
|
}
|
|
#elif defined(HAVE_SETENV) && defined(HAVE_UNSETENV)
|
|
#undef setenv
|
|
#undef unsetenv
|
|
if (value) {
|
|
if (setenv(name, value, 1))
|
|
rb_sys_fail_str(rb_sprintf("setenv(%s)", name));
|
|
}
|
|
else {
|
|
#ifdef VOID_UNSETENV
|
|
unsetenv(name);
|
|
#else
|
|
if (unsetenv(name))
|
|
rb_sys_fail_str(rb_sprintf("unsetenv(%s)", name));
|
|
#endif
|
|
}
|
|
#elif defined __sun
|
|
/* Solaris 9 (or earlier) does not have setenv(3C) and unsetenv(3C). */
|
|
/* The below code was tested on Solaris 10 by:
|
|
% ./configure ac_cv_func_setenv=no ac_cv_func_unsetenv=no
|
|
*/
|
|
size_t len, mem_size;
|
|
char **env_ptr, *str, *mem_ptr;
|
|
|
|
check_envname(name);
|
|
len = strlen(name);
|
|
if (value) {
|
|
mem_size = len + strlen(value) + 2;
|
|
mem_ptr = malloc(mem_size);
|
|
if (mem_ptr == NULL)
|
|
rb_sys_fail_str(rb_sprintf("malloc("PRIuSIZE")", mem_size));
|
|
snprintf(mem_ptr, mem_size, "%s=%s", name, value);
|
|
}
|
|
for (env_ptr = GET_ENVIRON(environ); (str = *env_ptr) != 0; ++env_ptr) {
|
|
if (!strncmp(str, name, len) && str[len] == '=') {
|
|
if (!in_origenv(str)) free(str);
|
|
while ((env_ptr[0] = env_ptr[1]) != 0) env_ptr++;
|
|
break;
|
|
}
|
|
}
|
|
if (value) {
|
|
if (putenv(mem_ptr)) {
|
|
free(mem_ptr);
|
|
rb_sys_fail_str(rb_sprintf("putenv(%s)", name));
|
|
}
|
|
}
|
|
#else /* WIN32 */
|
|
size_t len;
|
|
int i;
|
|
|
|
i=envix(name); /* where does it go? */
|
|
|
|
if (environ == origenviron) { /* need we copy environment? */
|
|
int j;
|
|
int max;
|
|
char **tmpenv;
|
|
|
|
for (max = i; environ[max]; max++) ;
|
|
tmpenv = ALLOC_N(char*, max+2);
|
|
for (j=0; j<max; j++) /* copy environment */
|
|
tmpenv[j] = ruby_strdup(environ[j]);
|
|
tmpenv[max] = 0;
|
|
environ = tmpenv; /* tell exec where it is now */
|
|
}
|
|
if (environ[i]) {
|
|
char **envp = origenviron;
|
|
while (*envp && *envp != environ[i]) envp++;
|
|
if (!*envp)
|
|
xfree(environ[i]);
|
|
if (!value) {
|
|
while (environ[i]) {
|
|
environ[i] = environ[i+1];
|
|
i++;
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
else { /* does not exist yet */
|
|
if (!value) return;
|
|
REALLOC_N(environ, char*, i+2); /* just expand it a bit */
|
|
environ[i+1] = 0; /* make sure it's null terminated */
|
|
}
|
|
len = strlen(name) + strlen(value) + 2;
|
|
environ[i] = ALLOC_N(char, len);
|
|
snprintf(environ[i],len,"%s=%s",name,value); /* all that work just for this */
|
|
#endif /* WIN32 */
|
|
}
|
|
|
|
void
|
|
ruby_unsetenv(const char *name)
|
|
{
|
|
ruby_setenv(name, 0);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV[name] = value
|
|
* ENV.store(name, value) -> value
|
|
*
|
|
* Sets the environment variable +name+ to +value+. If the value given is
|
|
* +nil+ the environment variable is deleted.
|
|
*
|
|
*/
|
|
static VALUE
|
|
env_aset(VALUE obj, VALUE nm, VALUE val)
|
|
{
|
|
char *name, *value;
|
|
|
|
if (NIL_P(val)) {
|
|
env_delete(obj, nm);
|
|
return Qnil;
|
|
}
|
|
SafeStringValue(nm);
|
|
SafeStringValue(val);
|
|
/* nm can be modified in `val.to_str`, don't get `name` before
|
|
* check for `val` */
|
|
get_env_ptr(name, nm);
|
|
get_env_ptr(value, val);
|
|
|
|
ruby_setenv(name, value);
|
|
if (ENVMATCH(name, PATH_ENV)) {
|
|
if (OBJ_TAINTED(val)) {
|
|
/* already tainted, no check */
|
|
path_tainted = 1;
|
|
return val;
|
|
}
|
|
else {
|
|
path_tainted_p(value);
|
|
}
|
|
}
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.keys -> Array
|
|
*
|
|
* Returns every environment variable name in an Array
|
|
*/
|
|
static VALUE
|
|
env_keys(void)
|
|
{
|
|
char **env;
|
|
VALUE ary;
|
|
|
|
ary = rb_ary_new();
|
|
env = GET_ENVIRON(environ);
|
|
while (*env) {
|
|
char *s = strchr(*env, '=');
|
|
if (s) {
|
|
rb_ary_push(ary, env_str_new(*env, s-*env));
|
|
}
|
|
env++;
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
return ary;
|
|
}
|
|
|
|
static VALUE
|
|
rb_env_size(VALUE ehash, VALUE args, VALUE eobj)
|
|
{
|
|
char **env;
|
|
long cnt = 0;
|
|
|
|
env = GET_ENVIRON(environ);
|
|
for (; *env ; ++env) {
|
|
if (strchr(*env, '=')) {
|
|
cnt++;
|
|
}
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
return LONG2FIX(cnt);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.each_key { |name| } -> Hash
|
|
* ENV.each_key -> Enumerator
|
|
*
|
|
* Yields each environment variable name.
|
|
*
|
|
* An Enumerator is returned if no block is given.
|
|
*/
|
|
static VALUE
|
|
env_each_key(VALUE ehash)
|
|
{
|
|
VALUE keys;
|
|
long i;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ehash, 0, 0, rb_env_size);
|
|
keys = env_keys();
|
|
for (i=0; i<RARRAY_LEN(keys); i++) {
|
|
rb_yield(RARRAY_AREF(keys, i));
|
|
}
|
|
return ehash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.values -> Array
|
|
*
|
|
* Returns every environment variable value as an Array
|
|
*/
|
|
static VALUE
|
|
env_values(void)
|
|
{
|
|
VALUE ary;
|
|
char **env;
|
|
|
|
ary = rb_ary_new();
|
|
env = GET_ENVIRON(environ);
|
|
while (*env) {
|
|
char *s = strchr(*env, '=');
|
|
if (s) {
|
|
rb_ary_push(ary, env_str_new2(s+1));
|
|
}
|
|
env++;
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.each_value { |value| } -> Hash
|
|
* ENV.each_value -> Enumerator
|
|
*
|
|
* Yields each environment variable +value+.
|
|
*
|
|
* An Enumerator is returned if no block was given.
|
|
*/
|
|
static VALUE
|
|
env_each_value(VALUE ehash)
|
|
{
|
|
VALUE values;
|
|
long i;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ehash, 0, 0, rb_env_size);
|
|
values = env_values();
|
|
for (i=0; i<RARRAY_LEN(values); i++) {
|
|
rb_yield(RARRAY_AREF(values, i));
|
|
}
|
|
return ehash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.each { |name, value| } -> Hash
|
|
* ENV.each -> Enumerator
|
|
* ENV.each_pair { |name, value| } -> Hash
|
|
* ENV.each_pair -> Enumerator
|
|
*
|
|
* Yields each environment variable +name+ and +value+.
|
|
*
|
|
* If no block is given an Enumerator is returned.
|
|
*/
|
|
static VALUE
|
|
env_each_pair(VALUE ehash)
|
|
{
|
|
char **env;
|
|
VALUE ary;
|
|
long i;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ehash, 0, 0, rb_env_size);
|
|
|
|
ary = rb_ary_new();
|
|
env = GET_ENVIRON(environ);
|
|
while (*env) {
|
|
char *s = strchr(*env, '=');
|
|
if (s) {
|
|
rb_ary_push(ary, env_str_new(*env, s-*env));
|
|
rb_ary_push(ary, env_str_new2(s+1));
|
|
}
|
|
env++;
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
|
|
if (rb_block_arity() > 1) {
|
|
for (i=0; i<RARRAY_LEN(ary); i+=2) {
|
|
rb_yield_values(2, RARRAY_AREF(ary, i), RARRAY_AREF(ary, i+1));
|
|
}
|
|
}
|
|
else {
|
|
for (i=0; i<RARRAY_LEN(ary); i+=2) {
|
|
rb_yield(rb_assoc_new(RARRAY_AREF(ary, i), RARRAY_AREF(ary, i+1)));
|
|
}
|
|
}
|
|
return ehash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.reject! { |name, value| } -> ENV or nil
|
|
* ENV.reject! -> Enumerator
|
|
*
|
|
* Equivalent to ENV#delete_if but returns +nil+ if no changes were made.
|
|
*
|
|
* Returns an Enumerator if no block was given.
|
|
*/
|
|
static VALUE
|
|
env_reject_bang(VALUE ehash)
|
|
{
|
|
volatile VALUE keys;
|
|
long i;
|
|
int del = 0;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ehash, 0, 0, rb_env_size);
|
|
keys = env_keys();
|
|
RBASIC_CLEAR_CLASS(keys);
|
|
for (i=0; i<RARRAY_LEN(keys); i++) {
|
|
VALUE val = rb_f_getenv(Qnil, RARRAY_AREF(keys, i));
|
|
if (!NIL_P(val)) {
|
|
if (RTEST(rb_yield_values(2, RARRAY_AREF(keys, i), val))) {
|
|
FL_UNSET(RARRAY_AREF(keys, i), FL_TAINT);
|
|
env_delete(Qnil, RARRAY_AREF(keys, i));
|
|
del++;
|
|
}
|
|
}
|
|
}
|
|
if (del == 0) return Qnil;
|
|
return envtbl;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.delete_if { |name, value| } -> Hash
|
|
* ENV.delete_if -> Enumerator
|
|
*
|
|
* Deletes every environment variable for which the block evaluates to +true+.
|
|
*
|
|
* If no block is given an enumerator is returned instead.
|
|
*/
|
|
static VALUE
|
|
env_delete_if(VALUE ehash)
|
|
{
|
|
RETURN_SIZED_ENUMERATOR(ehash, 0, 0, rb_env_size);
|
|
env_reject_bang(ehash);
|
|
return envtbl;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.values_at(name, ...) -> Array
|
|
*
|
|
* Returns an array containing the environment variable values associated with
|
|
* the given names. See also ENV.select.
|
|
*/
|
|
static VALUE
|
|
env_values_at(int argc, VALUE *argv)
|
|
{
|
|
VALUE result;
|
|
long i;
|
|
|
|
result = rb_ary_new();
|
|
for (i=0; i<argc; i++) {
|
|
rb_ary_push(result, rb_f_getenv(Qnil, argv[i]));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.select { |name, value| } -> Hash
|
|
* ENV.select -> Enumerator
|
|
*
|
|
* Returns a copy of the environment for entries where the block returns true.
|
|
*
|
|
* Returns an Enumerator if no block was given.
|
|
*/
|
|
static VALUE
|
|
env_select(VALUE ehash)
|
|
{
|
|
VALUE result;
|
|
VALUE keys;
|
|
long i;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ehash, 0, 0, rb_env_size);
|
|
result = rb_hash_new();
|
|
keys = env_keys();
|
|
for (i = 0; i < RARRAY_LEN(keys); ++i) {
|
|
VALUE key = RARRAY_AREF(keys, i);
|
|
VALUE val = rb_f_getenv(Qnil, key);
|
|
if (!NIL_P(val)) {
|
|
if (RTEST(rb_yield_values(2, key, val))) {
|
|
rb_hash_aset(result, key, val);
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.select! { |name, value| } -> ENV or nil
|
|
* ENV.select! -> Enumerator
|
|
*
|
|
* Equivalent to ENV#keep_if but returns +nil+ if no changes were made.
|
|
*/
|
|
static VALUE
|
|
env_select_bang(VALUE ehash)
|
|
{
|
|
volatile VALUE keys;
|
|
long i;
|
|
int del = 0;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ehash, 0, 0, rb_env_size);
|
|
keys = env_keys();
|
|
RBASIC_CLEAR_CLASS(keys);
|
|
for (i=0; i<RARRAY_LEN(keys); i++) {
|
|
VALUE val = rb_f_getenv(Qnil, RARRAY_AREF(keys, i));
|
|
if (!NIL_P(val)) {
|
|
if (!RTEST(rb_yield_values(2, RARRAY_AREF(keys, i), val))) {
|
|
FL_UNSET(RARRAY_AREF(keys, i), FL_TAINT);
|
|
env_delete(Qnil, RARRAY_AREF(keys, i));
|
|
del++;
|
|
}
|
|
}
|
|
}
|
|
if (del == 0) return Qnil;
|
|
return envtbl;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.keep_if { |name, value| } -> Hash
|
|
* ENV.keep_if -> Enumerator
|
|
*
|
|
* Deletes every environment variable where the block evaluates to +false+.
|
|
*
|
|
* Returns an enumerator if no block was given.
|
|
*/
|
|
static VALUE
|
|
env_keep_if(VALUE ehash)
|
|
{
|
|
RETURN_SIZED_ENUMERATOR(ehash, 0, 0, rb_env_size);
|
|
env_select_bang(ehash);
|
|
return envtbl;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.clear
|
|
*
|
|
* Removes every environment variable.
|
|
*/
|
|
VALUE
|
|
rb_env_clear(void)
|
|
{
|
|
volatile VALUE keys;
|
|
long i;
|
|
|
|
keys = env_keys();
|
|
for (i=0; i<RARRAY_LEN(keys); i++) {
|
|
VALUE val = rb_f_getenv(Qnil, RARRAY_AREF(keys, i));
|
|
if (!NIL_P(val)) {
|
|
env_delete(Qnil, RARRAY_AREF(keys, i));
|
|
}
|
|
}
|
|
return envtbl;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.to_s -> "ENV"
|
|
*
|
|
* Returns "ENV"
|
|
*/
|
|
static VALUE
|
|
env_to_s(void)
|
|
{
|
|
return rb_usascii_str_new2("ENV");
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.inspect -> string
|
|
*
|
|
* Returns the contents of the environment as a String.
|
|
*/
|
|
static VALUE
|
|
env_inspect(void)
|
|
{
|
|
char **env;
|
|
VALUE str, i;
|
|
|
|
str = rb_str_buf_new2("{");
|
|
env = GET_ENVIRON(environ);
|
|
while (*env) {
|
|
char *s = strchr(*env, '=');
|
|
|
|
if (env != environ) {
|
|
rb_str_buf_cat2(str, ", ");
|
|
}
|
|
if (s) {
|
|
rb_str_buf_cat2(str, "\"");
|
|
rb_str_buf_cat(str, *env, s-*env);
|
|
rb_str_buf_cat2(str, "\"=>");
|
|
i = rb_inspect(rb_str_new2(s+1));
|
|
rb_str_buf_append(str, i);
|
|
}
|
|
env++;
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
rb_str_buf_cat2(str, "}");
|
|
OBJ_TAINT(str);
|
|
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.to_a -> Array
|
|
*
|
|
* Converts the environment variables into an array of names and value arrays.
|
|
*
|
|
* ENV.to_a # => [["TERM", "xterm-color"], ["SHELL", "/bin/bash"], ...]
|
|
*
|
|
*/
|
|
static VALUE
|
|
env_to_a(void)
|
|
{
|
|
char **env;
|
|
VALUE ary;
|
|
|
|
ary = rb_ary_new();
|
|
env = GET_ENVIRON(environ);
|
|
while (*env) {
|
|
char *s = strchr(*env, '=');
|
|
if (s) {
|
|
rb_ary_push(ary, rb_assoc_new(env_str_new(*env, s-*env),
|
|
env_str_new2(s+1)));
|
|
}
|
|
env++;
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.rehash
|
|
*
|
|
* Re-hashing the environment variables does nothing. It is provided for
|
|
* compatibility with Hash.
|
|
*/
|
|
static VALUE
|
|
env_none(void)
|
|
{
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.length
|
|
* ENV.size
|
|
*
|
|
* Returns the number of environment variables.
|
|
*/
|
|
static VALUE
|
|
env_size(void)
|
|
{
|
|
int i;
|
|
char **env;
|
|
|
|
env = GET_ENVIRON(environ);
|
|
for (i=0; env[i]; i++)
|
|
;
|
|
FREE_ENVIRON(environ);
|
|
return INT2FIX(i);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.empty? -> true or false
|
|
*
|
|
* Returns true when there are no environment variables
|
|
*/
|
|
static VALUE
|
|
env_empty_p(void)
|
|
{
|
|
char **env;
|
|
|
|
env = GET_ENVIRON(environ);
|
|
if (env[0] == 0) {
|
|
FREE_ENVIRON(environ);
|
|
return Qtrue;
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
return Qfalse;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.key?(name) -> true or false
|
|
* ENV.include?(name) -> true or false
|
|
* ENV.has_key?(name) -> true or false
|
|
* ENV.member?(name) -> true or false
|
|
*
|
|
* Returns +true+ if there is an environment variable with the given +name+.
|
|
*/
|
|
static VALUE
|
|
env_has_key(VALUE env, VALUE key)
|
|
{
|
|
const char *s;
|
|
|
|
s = env_name(key);
|
|
if (getenv(s)) return Qtrue;
|
|
return Qfalse;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.assoc(name) -> Array or nil
|
|
*
|
|
* Returns an Array of the name and value of the environment variable with
|
|
* +name+ or +nil+ if the name cannot be found.
|
|
*/
|
|
static VALUE
|
|
env_assoc(VALUE env, VALUE key)
|
|
{
|
|
const char *s, *e;
|
|
|
|
s = env_name(key);
|
|
e = getenv(s);
|
|
if (e) return rb_assoc_new(key, rb_tainted_str_new2(e));
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.value?(value) -> true or false
|
|
* ENV.has_value?(value) -> true or false
|
|
*
|
|
* Returns +true+ if there is an environment variable with the given +value+.
|
|
*/
|
|
static VALUE
|
|
env_has_value(VALUE dmy, VALUE obj)
|
|
{
|
|
char **env;
|
|
|
|
obj = rb_check_string_type(obj);
|
|
if (NIL_P(obj)) return Qnil;
|
|
rb_check_safe_obj(obj);
|
|
env = GET_ENVIRON(environ);
|
|
while (*env) {
|
|
char *s = strchr(*env, '=');
|
|
if (s++) {
|
|
long len = strlen(s);
|
|
if (RSTRING_LEN(obj) == len && strncmp(s, RSTRING_PTR(obj), len) == 0) {
|
|
FREE_ENVIRON(environ);
|
|
return Qtrue;
|
|
}
|
|
}
|
|
env++;
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
return Qfalse;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.rassoc(value)
|
|
*
|
|
* Returns an Array of the name and value of the environment variable with
|
|
* +value+ or +nil+ if the value cannot be found.
|
|
*/
|
|
static VALUE
|
|
env_rassoc(VALUE dmy, VALUE obj)
|
|
{
|
|
char **env;
|
|
|
|
obj = rb_check_string_type(obj);
|
|
if (NIL_P(obj)) return Qnil;
|
|
rb_check_safe_obj(obj);
|
|
env = GET_ENVIRON(environ);
|
|
while (*env) {
|
|
char *s = strchr(*env, '=');
|
|
if (s++) {
|
|
long len = strlen(s);
|
|
if (RSTRING_LEN(obj) == len && strncmp(s, RSTRING_PTR(obj), len) == 0) {
|
|
VALUE result = rb_assoc_new(rb_tainted_str_new(*env, s-*env-1), obj);
|
|
FREE_ENVIRON(environ);
|
|
return result;
|
|
}
|
|
}
|
|
env++;
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.key(value) -> name
|
|
*
|
|
* Returns the name of the environment variable with +value+. If the value is
|
|
* not found +nil+ is returned.
|
|
*/
|
|
static VALUE
|
|
env_key(VALUE dmy, VALUE value)
|
|
{
|
|
char **env;
|
|
VALUE str;
|
|
|
|
SafeStringValue(value);
|
|
env = GET_ENVIRON(environ);
|
|
while (*env) {
|
|
char *s = strchr(*env, '=');
|
|
if (s++) {
|
|
long len = strlen(s);
|
|
if (RSTRING_LEN(value) == len && strncmp(s, RSTRING_PTR(value), len) == 0) {
|
|
str = env_str_new(*env, s-*env-1);
|
|
FREE_ENVIRON(environ);
|
|
return str;
|
|
}
|
|
}
|
|
env++;
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.index(value) -> key
|
|
*
|
|
* Deprecated method that is equivalent to ENV.key
|
|
*/
|
|
static VALUE
|
|
env_index(VALUE dmy, VALUE value)
|
|
{
|
|
rb_warn("ENV.index is deprecated; use ENV.key");
|
|
return env_key(dmy, value);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.to_hash -> hash
|
|
* ENV.to_h -> hash
|
|
*
|
|
* Creates a hash with a copy of the environment variables.
|
|
*
|
|
*/
|
|
static VALUE
|
|
env_to_hash(void)
|
|
{
|
|
char **env;
|
|
VALUE hash;
|
|
|
|
hash = rb_hash_new();
|
|
env = GET_ENVIRON(environ);
|
|
while (*env) {
|
|
char *s = strchr(*env, '=');
|
|
if (s) {
|
|
rb_hash_aset(hash, env_str_new(*env, s-*env),
|
|
env_str_new2(s+1));
|
|
}
|
|
env++;
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
return hash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.reject { |name, value| } -> Hash
|
|
* ENV.reject -> Enumerator
|
|
*
|
|
* Same as ENV#delete_if, but works on (and returns) a copy of the
|
|
* environment.
|
|
*/
|
|
static VALUE
|
|
env_reject(void)
|
|
{
|
|
return rb_hash_delete_if(env_to_hash());
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.shift -> Array or nil
|
|
*
|
|
* Removes an environment variable name-value pair from ENV and returns it as
|
|
* an Array. Returns +nil+ if when the environment is empty.
|
|
*/
|
|
static VALUE
|
|
env_shift(void)
|
|
{
|
|
char **env;
|
|
VALUE result = Qnil;
|
|
|
|
env = GET_ENVIRON(environ);
|
|
if (*env) {
|
|
char *s = strchr(*env, '=');
|
|
if (s) {
|
|
VALUE key = env_str_new(*env, s-*env);
|
|
VALUE val = env_str_new2(getenv(RSTRING_PTR(key)));
|
|
env_delete(Qnil, key);
|
|
result = rb_assoc_new(key, val);
|
|
}
|
|
}
|
|
FREE_ENVIRON(environ);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.invert -> Hash
|
|
*
|
|
* Returns a new hash created by using environment variable names as values
|
|
* and values as names.
|
|
*/
|
|
static VALUE
|
|
env_invert(void)
|
|
{
|
|
return rb_hash_invert(env_to_hash());
|
|
}
|
|
|
|
static int
|
|
env_replace_i(VALUE key, VALUE val, VALUE keys)
|
|
{
|
|
env_aset(Qnil, key, val);
|
|
if (rb_ary_includes(keys, key)) {
|
|
rb_ary_delete(keys, key);
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.replace(hash) -> env
|
|
*
|
|
* Replaces the contents of the environment variables with the contents of
|
|
* +hash+.
|
|
*/
|
|
static VALUE
|
|
env_replace(VALUE env, VALUE hash)
|
|
{
|
|
volatile VALUE keys;
|
|
long i;
|
|
|
|
keys = env_keys();
|
|
if (env == hash) return env;
|
|
hash = to_hash(hash);
|
|
rb_hash_foreach(hash, env_replace_i, keys);
|
|
|
|
for (i=0; i<RARRAY_LEN(keys); i++) {
|
|
env_delete(env, RARRAY_AREF(keys, i));
|
|
}
|
|
return env;
|
|
}
|
|
|
|
static int
|
|
env_update_i(VALUE key, VALUE val)
|
|
{
|
|
if (rb_block_given_p()) {
|
|
val = rb_yield_values(3, key, rb_f_getenv(Qnil, key), val);
|
|
}
|
|
env_aset(Qnil, key, val);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ENV.update(hash) -> Hash
|
|
* ENV.update(hash) { |name, old_value, new_value| } -> Hash
|
|
*
|
|
* Adds the contents of +hash+ to the environment variables. If no block is
|
|
* specified entries with duplicate keys are overwritten, otherwise the value
|
|
* of each duplicate name is determined by calling the block with the key, its
|
|
* value from the environment and its value from the hash.
|
|
*/
|
|
static VALUE
|
|
env_update(VALUE env, VALUE hash)
|
|
{
|
|
if (env == hash) return env;
|
|
hash = to_hash(hash);
|
|
rb_hash_foreach(hash, env_update_i, 0);
|
|
return env;
|
|
}
|
|
|
|
/*
|
|
* A Hash is a dictionary-like collection of unique keys and their values.
|
|
* Also called associative arrays, they are similar to Arrays, but where an
|
|
* Array uses integers as its index, a Hash allows you to use any object
|
|
* type.
|
|
*
|
|
* Hashes enumerate their values in the order that the corresponding keys
|
|
* were inserted.
|
|
*
|
|
* A Hash can be easily created by using its implicit form:
|
|
*
|
|
* grades = { "Jane Doe" => 10, "Jim Doe" => 6 }
|
|
*
|
|
* Hashes allow an alternate syntax form when your keys are always symbols.
|
|
* Instead of
|
|
*
|
|
* options = { :font_size => 10, :font_family => "Arial" }
|
|
*
|
|
* You could write it as:
|
|
*
|
|
* options = { font_size: 10, font_family: "Arial" }
|
|
*
|
|
* Each named key is a symbol you can access in hash:
|
|
*
|
|
* options[:font_size] # => 10
|
|
*
|
|
* A Hash can also be created through its ::new method:
|
|
*
|
|
* grades = Hash.new
|
|
* grades["Dorothy Doe"] = 9
|
|
*
|
|
* Hashes have a <em>default value</em> that is returned when accessing
|
|
* keys that do not exist in the hash. If no default is set +nil+ is used.
|
|
* You can set the default value by sending it as an argument to Hash.new:
|
|
*
|
|
* grades = Hash.new(0)
|
|
*
|
|
* Or by using the #default= method:
|
|
*
|
|
* grades = {"Timmy Doe" => 8}
|
|
* grades.default = 0
|
|
*
|
|
* Accessing a value in a Hash requires using its key:
|
|
*
|
|
* puts grades["Jane Doe"] # => 0
|
|
*
|
|
* === Common Uses
|
|
*
|
|
* Hashes are an easy way to represent data structures, such as
|
|
*
|
|
* books = {}
|
|
* books[:matz] = "The Ruby Language"
|
|
* books[:black] = "The Well-Grounded Rubyist"
|
|
*
|
|
* Hashes are also commonly used as a way to have named parameters in
|
|
* functions. Note that no brackets are used below. If a hash is the last
|
|
* argument on a method call, no braces are needed, thus creating a really
|
|
* clean interface:
|
|
*
|
|
* Person.create(name: "John Doe", age: 27)
|
|
*
|
|
* def self.create(params)
|
|
* @name = params[:name]
|
|
* @age = params[:age]
|
|
* end
|
|
*
|
|
* === Hash Keys
|
|
*
|
|
* Two objects refer to the same hash key when their <code>hash</code> value
|
|
* is identical and the two objects are <code>eql?</code> to each other.
|
|
*
|
|
* A user-defined class may be used as a hash key if the <code>hash</code>
|
|
* and <code>eql?</code> methods are overridden to provide meaningful
|
|
* behavior. By default, separate instances refer to separate hash keys.
|
|
*
|
|
* A typical implementation of <code>hash</code> is based on the
|
|
* object's data while <code>eql?</code> is usually aliased to the overridden
|
|
* <code>==</code> method:
|
|
*
|
|
* class Book
|
|
* attr_reader :author, :title
|
|
*
|
|
* def initialize(author, title)
|
|
* @author = author
|
|
* @title = title
|
|
* end
|
|
*
|
|
* def ==(other)
|
|
* self.class === other and
|
|
* other.author == @author and
|
|
* other.title == @title
|
|
* end
|
|
*
|
|
* alias eql? ==
|
|
*
|
|
* def hash
|
|
* @author.hash ^ @title.hash # XOR
|
|
* end
|
|
* end
|
|
*
|
|
* book1 = Book.new 'matz', 'Ruby in a Nutshell'
|
|
* book2 = Book.new 'matz', 'Ruby in a Nutshell'
|
|
*
|
|
* reviews = {}
|
|
*
|
|
* reviews[book1] = 'Great reference!'
|
|
* reviews[book2] = 'Nice and compact!'
|
|
*
|
|
* reviews.length #=> 1
|
|
*
|
|
* See also Object#hash and Object#eql?
|
|
*/
|
|
|
|
void
|
|
Init_Hash(void)
|
|
{
|
|
#undef rb_intern
|
|
#define rb_intern(str) rb_intern_const(str)
|
|
|
|
id_hash = rb_intern("hash");
|
|
id_yield = rb_intern("yield");
|
|
id_default = rb_intern("default");
|
|
id_flatten_bang = rb_intern("flatten!");
|
|
|
|
rb_cHash = rb_define_class("Hash", rb_cObject);
|
|
|
|
rb_include_module(rb_cHash, rb_mEnumerable);
|
|
|
|
rb_define_alloc_func(rb_cHash, empty_hash_alloc);
|
|
rb_define_singleton_method(rb_cHash, "[]", rb_hash_s_create, -1);
|
|
rb_define_singleton_method(rb_cHash, "try_convert", rb_hash_s_try_convert, 1);
|
|
rb_define_method(rb_cHash,"initialize", rb_hash_initialize, -1);
|
|
rb_define_method(rb_cHash,"initialize_copy", rb_hash_initialize_copy, 1);
|
|
rb_define_method(rb_cHash,"rehash", rb_hash_rehash, 0);
|
|
|
|
rb_define_method(rb_cHash,"to_hash", rb_hash_to_hash, 0);
|
|
rb_define_method(rb_cHash,"to_h", rb_hash_to_h, 0);
|
|
rb_define_method(rb_cHash,"to_a", rb_hash_to_a, 0);
|
|
rb_define_method(rb_cHash,"inspect", rb_hash_inspect, 0);
|
|
rb_define_alias(rb_cHash, "to_s", "inspect");
|
|
|
|
rb_define_method(rb_cHash,"==", rb_hash_equal, 1);
|
|
rb_define_method(rb_cHash,"[]", rb_hash_aref, 1);
|
|
rb_define_method(rb_cHash,"hash", rb_hash_hash, 0);
|
|
rb_define_method(rb_cHash,"eql?", rb_hash_eql, 1);
|
|
rb_define_method(rb_cHash,"fetch", rb_hash_fetch_m, -1);
|
|
rb_define_method(rb_cHash,"[]=", rb_hash_aset, 2);
|
|
rb_define_method(rb_cHash,"store", rb_hash_aset, 2);
|
|
rb_define_method(rb_cHash,"default", rb_hash_default, -1);
|
|
rb_define_method(rb_cHash,"default=", rb_hash_set_default, 1);
|
|
rb_define_method(rb_cHash,"default_proc", rb_hash_default_proc, 0);
|
|
rb_define_method(rb_cHash,"default_proc=", rb_hash_set_default_proc, 1);
|
|
rb_define_method(rb_cHash,"key", rb_hash_key, 1);
|
|
rb_define_method(rb_cHash,"index", rb_hash_index, 1);
|
|
rb_define_method(rb_cHash,"size", rb_hash_size, 0);
|
|
rb_define_method(rb_cHash,"length", rb_hash_size, 0);
|
|
rb_define_method(rb_cHash,"empty?", rb_hash_empty_p, 0);
|
|
|
|
rb_define_method(rb_cHash,"each_value", rb_hash_each_value, 0);
|
|
rb_define_method(rb_cHash,"each_key", rb_hash_each_key, 0);
|
|
rb_define_method(rb_cHash,"each_pair", rb_hash_each_pair, 0);
|
|
rb_define_method(rb_cHash,"each", rb_hash_each_pair, 0);
|
|
|
|
rb_define_method(rb_cHash,"keys", rb_hash_keys, 0);
|
|
rb_define_method(rb_cHash,"values", rb_hash_values, 0);
|
|
rb_define_method(rb_cHash,"values_at", rb_hash_values_at, -1);
|
|
|
|
rb_define_method(rb_cHash,"shift", rb_hash_shift, 0);
|
|
rb_define_method(rb_cHash,"delete", rb_hash_delete, 1);
|
|
rb_define_method(rb_cHash,"delete_if", rb_hash_delete_if, 0);
|
|
rb_define_method(rb_cHash,"keep_if", rb_hash_keep_if, 0);
|
|
rb_define_method(rb_cHash,"select", rb_hash_select, 0);
|
|
rb_define_method(rb_cHash,"select!", rb_hash_select_bang, 0);
|
|
rb_define_method(rb_cHash,"reject", rb_hash_reject, 0);
|
|
rb_define_method(rb_cHash,"reject!", rb_hash_reject_bang, 0);
|
|
rb_define_method(rb_cHash,"clear", rb_hash_clear, 0);
|
|
rb_define_method(rb_cHash,"invert", rb_hash_invert, 0);
|
|
rb_define_method(rb_cHash,"update", rb_hash_update, 1);
|
|
rb_define_method(rb_cHash,"replace", rb_hash_replace, 1);
|
|
rb_define_method(rb_cHash,"merge!", rb_hash_update, 1);
|
|
rb_define_method(rb_cHash,"merge", rb_hash_merge, 1);
|
|
rb_define_method(rb_cHash, "assoc", rb_hash_assoc, 1);
|
|
rb_define_method(rb_cHash, "rassoc", rb_hash_rassoc, 1);
|
|
rb_define_method(rb_cHash, "flatten", rb_hash_flatten, -1);
|
|
|
|
rb_define_method(rb_cHash,"include?", rb_hash_has_key, 1);
|
|
rb_define_method(rb_cHash,"member?", rb_hash_has_key, 1);
|
|
rb_define_method(rb_cHash,"has_key?", rb_hash_has_key, 1);
|
|
rb_define_method(rb_cHash,"has_value?", rb_hash_has_value, 1);
|
|
rb_define_method(rb_cHash,"key?", rb_hash_has_key, 1);
|
|
rb_define_method(rb_cHash,"value?", rb_hash_has_value, 1);
|
|
|
|
rb_define_method(rb_cHash,"compare_by_identity", rb_hash_compare_by_id, 0);
|
|
rb_define_method(rb_cHash,"compare_by_identity?", rb_hash_compare_by_id_p, 0);
|
|
|
|
rb_define_method(rb_cHash, "any?", rb_hash_any_p, 0);
|
|
|
|
/* Document-class: ENV
|
|
*
|
|
* ENV is a hash-like accessor for environment variables.
|
|
*/
|
|
|
|
/*
|
|
* Hack to get RDoc to regard ENV as a class:
|
|
* envtbl = rb_define_class("ENV", rb_cObject);
|
|
*/
|
|
origenviron = environ;
|
|
envtbl = rb_obj_alloc(rb_cObject);
|
|
rb_extend_object(envtbl, rb_mEnumerable);
|
|
|
|
rb_define_singleton_method(envtbl,"[]", rb_f_getenv, 1);
|
|
rb_define_singleton_method(envtbl,"fetch", env_fetch, -1);
|
|
rb_define_singleton_method(envtbl,"[]=", env_aset, 2);
|
|
rb_define_singleton_method(envtbl,"store", env_aset, 2);
|
|
rb_define_singleton_method(envtbl,"each", env_each_pair, 0);
|
|
rb_define_singleton_method(envtbl,"each_pair", env_each_pair, 0);
|
|
rb_define_singleton_method(envtbl,"each_key", env_each_key, 0);
|
|
rb_define_singleton_method(envtbl,"each_value", env_each_value, 0);
|
|
rb_define_singleton_method(envtbl,"delete", env_delete_m, 1);
|
|
rb_define_singleton_method(envtbl,"delete_if", env_delete_if, 0);
|
|
rb_define_singleton_method(envtbl,"keep_if", env_keep_if, 0);
|
|
rb_define_singleton_method(envtbl,"clear", rb_env_clear, 0);
|
|
rb_define_singleton_method(envtbl,"reject", env_reject, 0);
|
|
rb_define_singleton_method(envtbl,"reject!", env_reject_bang, 0);
|
|
rb_define_singleton_method(envtbl,"select", env_select, 0);
|
|
rb_define_singleton_method(envtbl,"select!", env_select_bang, 0);
|
|
rb_define_singleton_method(envtbl,"shift", env_shift, 0);
|
|
rb_define_singleton_method(envtbl,"invert", env_invert, 0);
|
|
rb_define_singleton_method(envtbl,"replace", env_replace, 1);
|
|
rb_define_singleton_method(envtbl,"update", env_update, 1);
|
|
rb_define_singleton_method(envtbl,"inspect", env_inspect, 0);
|
|
rb_define_singleton_method(envtbl,"rehash", env_none, 0);
|
|
rb_define_singleton_method(envtbl,"to_a", env_to_a, 0);
|
|
rb_define_singleton_method(envtbl,"to_s", env_to_s, 0);
|
|
rb_define_singleton_method(envtbl,"key", env_key, 1);
|
|
rb_define_singleton_method(envtbl,"index", env_index, 1);
|
|
rb_define_singleton_method(envtbl,"size", env_size, 0);
|
|
rb_define_singleton_method(envtbl,"length", env_size, 0);
|
|
rb_define_singleton_method(envtbl,"empty?", env_empty_p, 0);
|
|
rb_define_singleton_method(envtbl,"keys", env_keys, 0);
|
|
rb_define_singleton_method(envtbl,"values", env_values, 0);
|
|
rb_define_singleton_method(envtbl,"values_at", env_values_at, -1);
|
|
rb_define_singleton_method(envtbl,"include?", env_has_key, 1);
|
|
rb_define_singleton_method(envtbl,"member?", env_has_key, 1);
|
|
rb_define_singleton_method(envtbl,"has_key?", env_has_key, 1);
|
|
rb_define_singleton_method(envtbl,"has_value?", env_has_value, 1);
|
|
rb_define_singleton_method(envtbl,"key?", env_has_key, 1);
|
|
rb_define_singleton_method(envtbl,"value?", env_has_value, 1);
|
|
rb_define_singleton_method(envtbl,"to_hash", env_to_hash, 0);
|
|
rb_define_singleton_method(envtbl,"to_h", env_to_hash, 0);
|
|
rb_define_singleton_method(envtbl,"assoc", env_assoc, 1);
|
|
rb_define_singleton_method(envtbl,"rassoc", env_rassoc, 1);
|
|
|
|
/*
|
|
* ENV is a Hash-like accessor for environment variables.
|
|
*
|
|
* See ENV (the class) for more details.
|
|
*/
|
|
rb_define_global_const("ENV", envtbl);
|
|
|
|
/* for callcc */
|
|
ruby_register_rollback_func_for_ensure(hash_foreach_ensure, hash_foreach_ensure_rollback);
|
|
}
|