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encoding.c
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encoding.c
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/**********************************************************************
encoding.c -
$Author$
created at: Thu May 24 17:23:27 JST 2007
Copyright (C) 2007 Yukihiro Matsumoto
**********************************************************************/
#include "ruby/internal/config.h"
#include <ctype.h>
#include "encindex.h"
#include "internal.h"
#include "internal/enc.h"
#include "internal/encoding.h"
#include "internal/inits.h"
#include "internal/load.h"
#include "internal/object.h"
#include "internal/string.h"
#include "internal/vm.h"
#include "regenc.h"
#include "ruby/encoding.h"
#include "ruby/util.h"
#include "ruby_assert.h"
#include "vm_sync.h"
#ifndef ENC_DEBUG
#define ENC_DEBUG 0
#endif
#define ENC_ASSERT(expr) RUBY_ASSERT_WHEN(ENC_DEBUG, expr)
#define MUST_STRING(str) (ENC_ASSERT(RB_TYPE_P(str, T_STRING)), str)
#undef rb_ascii8bit_encindex
#undef rb_utf8_encindex
#undef rb_usascii_encindex
typedef OnigEncodingType rb_raw_encoding;
#if defined __GNUC__ && __GNUC__ >= 4
#pragma GCC visibility push(default)
int rb_enc_register(const char *name, rb_encoding *encoding);
void rb_enc_set_base(const char *name, const char *orig);
int rb_enc_set_dummy(int index);
void rb_encdb_declare(const char *name);
int rb_encdb_replicate(const char *name, const char *orig);
int rb_encdb_dummy(const char *name);
int rb_encdb_alias(const char *alias, const char *orig);
void rb_encdb_set_unicode(int index);
#pragma GCC visibility pop
#endif
static ID id_encoding;
VALUE rb_cEncoding;
#define DEFAULT_ENCODING_LIST_CAPA 128
static VALUE rb_default_encoding_list;
static VALUE rb_additional_encoding_list;
struct rb_encoding_entry {
const char *name;
rb_encoding *enc;
rb_encoding *base;
};
static struct enc_table {
struct rb_encoding_entry *list;
int count;
int size;
st_table *names;
} global_enc_table;
static rb_encoding *global_enc_ascii,
*global_enc_utf_8,
*global_enc_us_ascii;
#define GLOBAL_ENC_TABLE_ENTER(enc_table) struct enc_table *enc_table = &global_enc_table; RB_VM_LOCK_ENTER()
#define GLOBAL_ENC_TABLE_LEAVE() RB_VM_LOCK_LEAVE()
#define GLOBAL_ENC_TABLE_EVAL(enc_table, expr) do { \
GLOBAL_ENC_TABLE_ENTER(enc_table); \
{ \
expr; \
} \
GLOBAL_ENC_TABLE_LEAVE(); \
} while (0)
#define ENC_DUMMY_FLAG (1<<24)
#define ENC_INDEX_MASK (~(~0U<<24))
#define ENC_TO_ENCINDEX(enc) (int)((enc)->ruby_encoding_index & ENC_INDEX_MASK)
#define ENC_DUMMY_P(enc) ((enc)->ruby_encoding_index & ENC_DUMMY_FLAG)
#define ENC_SET_DUMMY(enc) ((enc)->ruby_encoding_index |= ENC_DUMMY_FLAG)
#define ENCODING_COUNT ENCINDEX_BUILTIN_MAX
#define UNSPECIFIED_ENCODING INT_MAX
#define ENCODING_NAMELEN_MAX 63
#define valid_encoding_name_p(name) ((name) && strlen(name) <= ENCODING_NAMELEN_MAX)
static const rb_data_type_t encoding_data_type = {
"encoding",
{0, 0, 0,},
0, 0, RUBY_TYPED_FREE_IMMEDIATELY
};
#define is_data_encoding(obj) (RTYPEDDATA_P(obj) && RTYPEDDATA_TYPE(obj) == &encoding_data_type)
#define is_obj_encoding(obj) (RB_TYPE_P((obj), T_DATA) && is_data_encoding(obj))
int
rb_data_is_encoding(VALUE obj)
{
return is_data_encoding(obj);
}
static VALUE
enc_new(rb_encoding *encoding)
{
VALUE enc = TypedData_Wrap_Struct(rb_cEncoding, &encoding_data_type, (void *)encoding);
rb_obj_freeze(enc);
FL_SET_RAW(enc, RUBY_FL_SHAREABLE);
return enc;
}
static void
enc_list_update(int index, rb_raw_encoding *encoding)
{
if (index < DEFAULT_ENCODING_LIST_CAPA) {
VALUE list = rb_default_encoding_list;
if (list && NIL_P(rb_ary_entry(list, index))) {
/* initialize encoding data */
rb_ary_store(list, index, enc_new(encoding));
}
}
else {
RB_VM_LOCK_ENTER();
{
VALUE list = rb_additional_encoding_list;
if (list && NIL_P(rb_ary_entry(list, index))) {
/* initialize encoding data */
rb_ary_store(list, index - DEFAULT_ENCODING_LIST_CAPA, enc_new(encoding));
}
}
RB_VM_LOCK_LEAVE();
}
}
static VALUE
enc_list_lookup(int idx)
{
VALUE list, enc;
if (idx < DEFAULT_ENCODING_LIST_CAPA) {
if (!(list = rb_default_encoding_list)) {
rb_bug("rb_enc_from_encoding_index(%d): no rb_default_encoding_list", idx);
}
enc = rb_ary_entry(list, idx);
}
else {
RB_VM_LOCK_ENTER();
{
if (!(list = rb_additional_encoding_list)) {
rb_bug("rb_enc_from_encoding_index(%d): no rb_additional_encoding_list", idx);
}
enc = rb_ary_entry(list, idx - DEFAULT_ENCODING_LIST_CAPA);
}
RB_VM_LOCK_LEAVE();
}
if (NIL_P(enc)) {
rb_bug("rb_enc_from_encoding_index(%d): not created yet", idx);
}
else {
return enc;
}
}
static VALUE
rb_enc_from_encoding_index(int idx)
{
return enc_list_lookup(idx);
}
VALUE
rb_enc_from_encoding(rb_encoding *encoding)
{
int idx;
if (!encoding) return Qnil;
idx = ENC_TO_ENCINDEX(encoding);
return rb_enc_from_encoding_index(idx);
}
int
rb_enc_to_index(rb_encoding *enc)
{
return enc ? ENC_TO_ENCINDEX(enc) : 0;
}
int
rb_enc_dummy_p(rb_encoding *enc)
{
return ENC_DUMMY_P(enc) != 0;
}
static int
check_encoding(rb_encoding *enc)
{
int index = rb_enc_to_index(enc);
if (rb_enc_from_index(index) != enc)
return -1;
if (rb_enc_autoload_p(enc)) {
index = rb_enc_autoload(enc);
}
return index;
}
static int
enc_check_encoding(VALUE obj)
{
if (!is_obj_encoding(obj)) {
return -1;
}
return check_encoding(RDATA(obj)->data);
}
NORETURN(static void not_encoding(VALUE enc));
static void
not_encoding(VALUE enc)
{
rb_raise(rb_eTypeError, "wrong argument type %"PRIsVALUE" (expected Encoding)",
rb_obj_class(enc));
}
static rb_encoding *
must_encoding(VALUE enc)
{
int index = enc_check_encoding(enc);
if (index < 0) {
not_encoding(enc);
}
return DATA_PTR(enc);
}
static rb_encoding *
must_encindex(int index)
{
rb_encoding *enc = rb_enc_from_index(index);
if (!enc) {
rb_raise(rb_eEncodingError, "encoding index out of bound: %d",
index);
}
if (ENC_TO_ENCINDEX(enc) != (int)(index & ENC_INDEX_MASK)) {
rb_raise(rb_eEncodingError, "wrong encoding index %d for %s (expected %d)",
index, rb_enc_name(enc), ENC_TO_ENCINDEX(enc));
}
if (rb_enc_autoload_p(enc) && rb_enc_autoload(enc) == -1) {
rb_loaderror("failed to load encoding (%s)",
rb_enc_name(enc));
}
return enc;
}
int
rb_to_encoding_index(VALUE enc)
{
int idx;
const char *name;
idx = enc_check_encoding(enc);
if (idx >= 0) {
return idx;
}
else if (NIL_P(enc = rb_check_string_type(enc))) {
return -1;
}
if (!rb_enc_asciicompat(rb_enc_get(enc))) {
return -1;
}
if (!(name = rb_str_to_cstr(enc))) {
return -1;
}
return rb_enc_find_index(name);
}
static const char *
name_for_encoding(volatile VALUE *enc)
{
VALUE name = StringValue(*enc);
const char *n;
if (!rb_enc_asciicompat(rb_enc_get(name))) {
rb_raise(rb_eArgError, "invalid encoding name (non ASCII)");
}
if (!(n = rb_str_to_cstr(name))) {
rb_raise(rb_eArgError, "invalid encoding name (NUL byte)");
}
return n;
}
/* Returns encoding index or UNSPECIFIED_ENCODING */
static int
str_find_encindex(VALUE enc)
{
int idx = rb_enc_find_index(name_for_encoding(&enc));
RB_GC_GUARD(enc);
return idx;
}
static int
str_to_encindex(VALUE enc)
{
int idx = str_find_encindex(enc);
if (idx < 0) {
rb_raise(rb_eArgError, "unknown encoding name - %"PRIsVALUE, enc);
}
return idx;
}
static rb_encoding *
str_to_encoding(VALUE enc)
{
return rb_enc_from_index(str_to_encindex(enc));
}
rb_encoding *
rb_to_encoding(VALUE enc)
{
if (enc_check_encoding(enc) >= 0) return RDATA(enc)->data;
return str_to_encoding(enc);
}
rb_encoding *
rb_find_encoding(VALUE enc)
{
int idx;
if (enc_check_encoding(enc) >= 0) return RDATA(enc)->data;
idx = str_find_encindex(enc);
if (idx < 0) return NULL;
return rb_enc_from_index(idx);
}
static int
enc_table_expand(struct enc_table *enc_table, int newsize)
{
struct rb_encoding_entry *ent;
int count = newsize;
if (enc_table->size >= newsize) return newsize;
newsize = (newsize + 7) / 8 * 8;
ent = REALLOC_N(enc_table->list, struct rb_encoding_entry, newsize);
memset(ent + enc_table->size, 0, sizeof(*ent)*(newsize - enc_table->size));
enc_table->list = ent;
enc_table->size = newsize;
return count;
}
static int
enc_register_at(struct enc_table *enc_table, int index, const char *name, rb_encoding *base_encoding)
{
struct rb_encoding_entry *ent = &enc_table->list[index];
rb_raw_encoding *encoding;
if (!valid_encoding_name_p(name)) return -1;
if (!ent->name) {
ent->name = name = strdup(name);
}
else if (STRCASECMP(name, ent->name)) {
return -1;
}
encoding = (rb_raw_encoding *)ent->enc;
if (!encoding) {
encoding = xmalloc(sizeof(rb_encoding));
}
if (base_encoding) {
*encoding = *base_encoding;
}
else {
memset(encoding, 0, sizeof(*ent->enc));
}
encoding->name = name;
encoding->ruby_encoding_index = index;
ent->enc = encoding;
st_insert(enc_table->names, (st_data_t)name, (st_data_t)index);
enc_list_update(index, encoding);
return index;
}
static int
enc_register(struct enc_table *enc_table, const char *name, rb_encoding *encoding)
{
int index = enc_table->count;
enc_table->count = enc_table_expand(enc_table, index + 1);
return enc_register_at(enc_table, index, name, encoding);
}
static void set_encoding_const(const char *, rb_encoding *);
static int enc_registered(struct enc_table *enc_table, const char *name);
static rb_encoding *
enc_from_index(struct enc_table *enc_table, int index)
{
if (UNLIKELY(index < 0 || enc_table->count <= (index &= ENC_INDEX_MASK))) {
return 0;
}
return enc_table->list[index].enc;
}
rb_encoding *
rb_enc_from_index(int index)
{
rb_encoding *enc;
switch (index) {
case ENCINDEX_ASCII: return global_enc_ascii;
case ENCINDEX_UTF_8: return global_enc_utf_8;
case ENCINDEX_US_ASCII: return global_enc_us_ascii;
default:
GLOBAL_ENC_TABLE_EVAL(enc_table,
enc = enc_from_index(enc_table, index));
return enc;
}
}
int
rb_enc_register(const char *name, rb_encoding *encoding)
{
int index;
GLOBAL_ENC_TABLE_ENTER(enc_table);
{
index = enc_registered(enc_table, name);
if (index >= 0) {
rb_encoding *oldenc = enc_from_index(enc_table, index);
if (STRCASECMP(name, rb_enc_name(oldenc))) {
index = enc_register(enc_table, name, encoding);
}
else if (rb_enc_autoload_p(oldenc) || !ENC_DUMMY_P(oldenc)) {
enc_register_at(enc_table, index, name, encoding);
}
else {
rb_raise(rb_eArgError, "encoding %s is already registered", name);
}
}
else {
index = enc_register(enc_table, name, encoding);
set_encoding_const(name, rb_enc_from_index(index));
}
}
GLOBAL_ENC_TABLE_LEAVE();
return index;
}
int
enc_registered(struct enc_table *enc_table, const char *name)
{
st_data_t idx = 0;
if (!name) return -1;
if (!enc_table->list) return -1;
if (st_lookup(enc_table->names, (st_data_t)name, &idx)) {
return (int)idx;
}
return -1;
}
void
rb_encdb_declare(const char *name)
{
GLOBAL_ENC_TABLE_ENTER(enc_table);
{
int idx = enc_registered(enc_table, name);
if (idx < 0) {
idx = enc_register(enc_table, name, 0);
}
set_encoding_const(name, rb_enc_from_index(idx));
}
GLOBAL_ENC_TABLE_LEAVE();
}
static void
enc_check_duplication(struct enc_table *enc_table, const char *name)
{
if (enc_registered(enc_table, name) >= 0) {
rb_raise(rb_eArgError, "encoding %s is already registered", name);
}
}
static rb_encoding*
set_base_encoding(struct enc_table *enc_table, int index, rb_encoding *base)
{
rb_encoding *enc = enc_table->list[index].enc;
ASSUME(enc);
enc_table->list[index].base = base;
if (ENC_DUMMY_P(base)) ENC_SET_DUMMY((rb_raw_encoding *)enc);
return enc;
}
/* for encdb.h
* Set base encoding for encodings which are not replicas
* but not in their own files.
*/
void
rb_enc_set_base(const char *name, const char *orig)
{
GLOBAL_ENC_TABLE_ENTER(enc_table);
{
int idx = enc_registered(enc_table, name);
int origidx = enc_registered(enc_table, orig);
set_base_encoding(enc_table, idx, rb_enc_from_index(origidx));
}
GLOBAL_ENC_TABLE_LEAVE();
}
/* for encdb.h
* Set encoding dummy.
*/
int
rb_enc_set_dummy(int index)
{
rb_encoding *enc;
GLOBAL_ENC_TABLE_EVAL(enc_table,
enc = enc_table->list[index].enc);
ENC_SET_DUMMY((rb_raw_encoding *)enc);
return index;
}
static int
enc_replicate(struct enc_table *enc_table, const char *name, rb_encoding *encoding)
{
int idx;
enc_check_duplication(enc_table, name);
idx = enc_register(enc_table, name, encoding);
if (idx < 0) rb_raise(rb_eArgError, "invalid encoding name: %s", name);
set_base_encoding(enc_table, idx, encoding);
set_encoding_const(name, rb_enc_from_index(idx));
return idx;
}
int
rb_enc_replicate(const char *name, rb_encoding *encoding)
{
int r;
GLOBAL_ENC_TABLE_EVAL(enc_table,
r = enc_replicate(enc_table, name, encoding));
return r;
}
/*
* call-seq:
* enc.replicate(name) -> encoding
*
* Returns a replicated encoding of _enc_ whose name is _name_.
* The new encoding should have the same byte structure of _enc_.
* If _name_ is used by another encoding, raise ArgumentError.
*
*/
static VALUE
enc_replicate_m(VALUE encoding, VALUE name)
{
int idx = rb_enc_replicate(name_for_encoding(&name), rb_to_encoding(encoding));
RB_GC_GUARD(name);
return rb_enc_from_encoding_index(idx);
}
static int
enc_replicate_with_index(struct enc_table *enc_table, const char *name, rb_encoding *origenc, int idx)
{
if (idx < 0) {
idx = enc_register(enc_table, name, origenc);
}
else {
idx = enc_register_at(enc_table, idx, name, origenc);
}
if (idx >= 0) {
set_base_encoding(enc_table, idx, origenc);
set_encoding_const(name, rb_enc_from_index(idx));
}
else {
rb_raise(rb_eArgError, "failed to replicate encoding");
}
return idx;
}
int
rb_encdb_replicate(const char *name, const char *orig)
{
int r;
GLOBAL_ENC_TABLE_ENTER(enc_table);
{
int origidx = enc_registered(enc_table, orig);
int idx = enc_registered(enc_table, name);
if (origidx < 0) {
origidx = enc_register(enc_table, orig, 0);
}
r = enc_replicate_with_index(enc_table, name, rb_enc_from_index(origidx), idx);
}
GLOBAL_ENC_TABLE_LEAVE();
return r;
}
int
rb_define_dummy_encoding(const char *name)
{
int index;
GLOBAL_ENC_TABLE_ENTER(enc_table);
{
index = enc_replicate(enc_table, name, rb_ascii8bit_encoding());
rb_encoding *enc = enc_table->list[index].enc;
ENC_SET_DUMMY((rb_raw_encoding *)enc);
}
GLOBAL_ENC_TABLE_LEAVE();
return index;
}
int
rb_encdb_dummy(const char *name)
{
int index;
GLOBAL_ENC_TABLE_ENTER(enc_table);
{
index = enc_replicate_with_index(enc_table, name,
rb_ascii8bit_encoding(),
enc_registered(enc_table, name));
rb_encoding *enc = enc_table->list[index].enc;
ENC_SET_DUMMY((rb_raw_encoding *)enc);
}
GLOBAL_ENC_TABLE_LEAVE();
return index;
}
/*
* call-seq:
* enc.dummy? -> true or false
*
* Returns true for dummy encodings.
* A dummy encoding is an encoding for which character handling is not properly
* implemented.
* It is used for stateful encodings.
*
* Encoding::ISO_2022_JP.dummy? #=> true
* Encoding::UTF_8.dummy? #=> false
*
*/
static VALUE
enc_dummy_p(VALUE enc)
{
return RBOOL(ENC_DUMMY_P(must_encoding(enc)));
}
/*
* call-seq:
* enc.ascii_compatible? -> true or false
*
* Returns whether ASCII-compatible or not.
*
* Encoding::UTF_8.ascii_compatible? #=> true
* Encoding::UTF_16BE.ascii_compatible? #=> false
*
*/
static VALUE
enc_ascii_compatible_p(VALUE enc)
{
return RBOOL(rb_enc_asciicompat(must_encoding(enc)));
}
/*
* Returns non-zero when the encoding is Unicode series other than UTF-7 else 0.
*/
int
rb_enc_unicode_p(rb_encoding *enc)
{
return ONIGENC_IS_UNICODE(enc);
}
static st_data_t
enc_dup_name(st_data_t name)
{
return (st_data_t)strdup((const char *)name);
}
/*
* Returns copied alias name when the key is added for st_table,
* else returns NULL.
*/
static int
enc_alias_internal(struct enc_table *enc_table, const char *alias, int idx)
{
return st_insert2(enc_table->names, (st_data_t)alias, (st_data_t)idx,
enc_dup_name);
}
static int
enc_alias(struct enc_table *enc_table, const char *alias, int idx)
{
if (!valid_encoding_name_p(alias)) return -1;
if (!enc_alias_internal(enc_table, alias, idx))
set_encoding_const(alias, enc_from_index(enc_table, idx));
return idx;
}
int
rb_enc_alias(const char *alias, const char *orig)
{
int idx, r;
GLOBAL_ENC_TABLE_ENTER(enc_table);
{
enc_check_duplication(enc_table, alias);
if ((idx = rb_enc_find_index(orig)) < 0) {
r = -1;
}
else {
r = enc_alias(enc_table, alias, idx);
}
}
GLOBAL_ENC_TABLE_LEAVE();
return r;
}
int
rb_encdb_alias(const char *alias, const char *orig)
{
int r;
GLOBAL_ENC_TABLE_ENTER(enc_table);
{
int idx = enc_registered(enc_table, orig);
if (idx < 0) {
idx = enc_register(enc_table, orig, 0);
}
r = enc_alias(enc_table, alias, idx);
}
GLOBAL_ENC_TABLE_LEAVE();
return r;
}
void
rb_encdb_set_unicode(int index)
{
rb_raw_encoding *enc = (rb_raw_encoding *)rb_enc_from_index(index);
ASSUME(enc);
enc->flags |= ONIGENC_FLAG_UNICODE;
}
static void
rb_enc_init(struct enc_table *enc_table)
{
enc_table_expand(enc_table, ENCODING_COUNT + 1);
if (!enc_table->names) {
enc_table->names = st_init_strcasetable();
}
#define ENC_REGISTER(enc) enc_register_at(enc_table, ENCINDEX_##enc, rb_enc_name(&OnigEncoding##enc), &OnigEncoding##enc)
ENC_REGISTER(ASCII);
ENC_REGISTER(UTF_8);
ENC_REGISTER(US_ASCII);
global_enc_ascii = enc_table->list[ENCINDEX_ASCII].enc;
global_enc_utf_8 = enc_table->list[ENCINDEX_UTF_8].enc;
global_enc_us_ascii = enc_table->list[ENCINDEX_US_ASCII].enc;
#undef ENC_REGISTER
#define ENCDB_REGISTER(name, enc) enc_register_at(enc_table, ENCINDEX_##enc, name, NULL)
ENCDB_REGISTER("UTF-16BE", UTF_16BE);
ENCDB_REGISTER("UTF-16LE", UTF_16LE);
ENCDB_REGISTER("UTF-32BE", UTF_32BE);
ENCDB_REGISTER("UTF-32LE", UTF_32LE);
ENCDB_REGISTER("UTF-16", UTF_16);
ENCDB_REGISTER("UTF-32", UTF_32);
ENCDB_REGISTER("UTF8-MAC", UTF8_MAC);
ENCDB_REGISTER("EUC-JP", EUC_JP);
ENCDB_REGISTER("Windows-31J", Windows_31J);
#undef ENCDB_REGISTER
enc_table->count = ENCINDEX_BUILTIN_MAX;
}
rb_encoding *
rb_enc_get_from_index(int index)
{
return must_encindex(index);
}
int rb_require_internal_silent(VALUE fname);
static int
load_encoding(const char *name)
{
VALUE enclib = rb_sprintf("enc/%s.so", name);
VALUE debug = ruby_debug;
VALUE errinfo;
char *s = RSTRING_PTR(enclib) + 4, *e = RSTRING_END(enclib) - 3;
int loaded;
int idx;
while (s < e) {
if (!ISALNUM(*s)) *s = '_';
else if (ISUPPER(*s)) *s = (char)TOLOWER(*s);
++s;
}
enclib = rb_fstring(enclib);
ruby_debug = Qfalse;
errinfo = rb_errinfo();
loaded = rb_require_internal_silent(enclib);
ruby_debug = debug;
rb_set_errinfo(errinfo);
GLOBAL_ENC_TABLE_ENTER(enc_table);
{
if (loaded < 0 || 1 < loaded) {
idx = -1;
}
else if ((idx = enc_registered(enc_table, name)) < 0) {
idx = -1;
}
else if (rb_enc_autoload_p(enc_table->list[idx].enc)) {
idx = -1;
}
}
GLOBAL_ENC_TABLE_LEAVE();
return idx;
}
static int
enc_autoload_body(struct enc_table *enc_table, rb_encoding *enc)
{
rb_encoding *base = enc_table->list[ENC_TO_ENCINDEX(enc)].base;
if (base) {
int i = 0;
do {
if (i >= enc_table->count) return -1;
} while (enc_table->list[i].enc != base && (++i, 1));
if (rb_enc_autoload_p(base)) {
if (rb_enc_autoload(base) < 0) return -1;
}
i = enc->ruby_encoding_index;
enc_register_at(enc_table, i & ENC_INDEX_MASK, rb_enc_name(enc), base);
((rb_raw_encoding *)enc)->ruby_encoding_index = i;
i &= ENC_INDEX_MASK;
return i;
}
else {
return -2;
}
}
int
rb_enc_autoload(rb_encoding *enc)
{
int i;
GLOBAL_ENC_TABLE_EVAL(enc_table, i = enc_autoload_body(enc_table, enc));
if (i == -2) {
i = load_encoding(rb_enc_name(enc));
}
return i;
}
/* Return encoding index or UNSPECIFIED_ENCODING from encoding name */
int
rb_enc_find_index(const char *name)
{
int i;
rb_encoding *enc;
GLOBAL_ENC_TABLE_EVAL(enc_table, i = enc_registered(enc_table, name));
if (i < 0) {
i = load_encoding(name);
}
else if (!(enc = rb_enc_from_index(i))) {
if (i != UNSPECIFIED_ENCODING) {
rb_raise(rb_eArgError, "encoding %s is not registered", name);
}
}
else if (rb_enc_autoload_p(enc)) {
if (rb_enc_autoload(enc) < 0) {
rb_warn("failed to load encoding (%s); use ASCII-8BIT instead",
name);
return 0;
}
}
return i;
}
int
rb_enc_find_index2(const char *name, long len)
{
char buf[ENCODING_NAMELEN_MAX+1];
if (len > ENCODING_NAMELEN_MAX) return -1;
memcpy(buf, name, len);
buf[len] = '\0';
return rb_enc_find_index(buf);
}
rb_encoding *
rb_enc_find(const char *name)
{
int idx = rb_enc_find_index(name);
if (idx < 0) idx = 0;
return rb_enc_from_index(idx);
}
static inline int
enc_capable(VALUE obj)
{
if (SPECIAL_CONST_P(obj)) return SYMBOL_P(obj);
switch (BUILTIN_TYPE(obj)) {
case T_STRING:
case T_REGEXP:
case T_FILE:
case T_SYMBOL:
return TRUE;
case T_DATA:
if (is_data_encoding(obj)) return TRUE;
default:
return FALSE;
}
}
int
rb_enc_capable(VALUE obj)
{
return enc_capable(obj);
}
ID
rb_id_encoding(void)
{
CONST_ID(id_encoding, "encoding");
return id_encoding;
}
static int
enc_get_index_str(VALUE str)
{
int i = ENCODING_GET_INLINED(str);
if (i == ENCODING_INLINE_MAX) {
VALUE iv;
#if 0
iv = rb_ivar_get(str, rb_id_encoding());
i = NUM2INT(iv);
#else
/*
* Tentatively, assume ASCII-8BIT, if encoding index instance
* variable is not found. This can happen when freeing after
* all instance variables are removed in `obj_free`.
*/
iv = rb_attr_get(str, rb_id_encoding());
i = NIL_P(iv) ? ENCINDEX_ASCII : NUM2INT(iv);
#endif
}
return i;
}
int
rb_enc_get_index(VALUE obj)
{
int i = -1;
VALUE tmp;
if (SPECIAL_CONST_P(obj)) {
if (!SYMBOL_P(obj)) return -1;
obj = rb_sym2str(obj);
}
switch (BUILTIN_TYPE(obj)) {
case T_STRING:
case T_SYMBOL:
case T_REGEXP:
i = enc_get_index_str(obj);
break;
case T_FILE:
tmp = rb_funcallv(obj, rb_intern("internal_encoding"), 0, 0);
if (NIL_P(tmp)) {
tmp = rb_funcallv(obj, rb_intern("external_encoding"), 0, 0);
}
if (is_obj_encoding(tmp)) {
i = enc_check_encoding(tmp);