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archived-php-src/ext/mbstring/libmbfl/mbfl/mbfl_encoding.h
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Alex Dowad 5fdb27246c Add mbstring support for GB18030-2022 text encoding 
The previous version of the GB-18030 standard was published in 2005.
This commit adds support for the updated (2022) version of this text
encoding. The existing GB18030 implementation has been left unchanged
for backwards compatibility; users who want to use the new standard
must explicitly indicate the desired text encoding is 'GB18030-2022'.

The document which defines GB18030-2022, published by the government
of the People's Republic of China, defines three levels of standards
compliance. This implementation is intended to achieve Implementation
Level 3, which is the highest level of compliance.

Experts in the GB18030 standard are requested to assess this
implementation and report any deviation from the standard.
2023-12-30 18:29:47 +02:00

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/*
* "streamable kanji code filter and converter"
* Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
*
* LICENSE NOTICES
*
* This file is part of "streamable kanji code filter and converter",
* which is distributed under the terms of GNU Lesser General Public
* License (version 2) as published by the Free Software Foundation.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with "streamable kanji code filter and converter";
* if not, write to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*
* The author of this file:
*
*/
/*
* The source code included in this files was separated from mbfilter.h
* by Moriyoshi Koizumi <moriyoshi@php.net> on 20 Dec 2002. The file
* mbfilter.h is included in this package .
*
*/
#ifndef MBFL_ENCODING_H
#define MBFL_ENCODING_H
#include "mbfl_defs.h"
#include "mbfl_consts.h"
#include "zend.h"
enum mbfl_no_encoding {
mbfl_no_encoding_invalid = -1,
mbfl_no_encoding_pass,
mbfl_no_encoding_wchar,
mbfl_no_encoding_base64,
mbfl_no_encoding_uuencode,
mbfl_no_encoding_html_ent,
mbfl_no_encoding_qprint,
mbfl_no_encoding_7bit,
mbfl_no_encoding_8bit,
mbfl_no_encoding_charset_min,
mbfl_no_encoding_ucs4,
mbfl_no_encoding_ucs4be,
mbfl_no_encoding_ucs4le,
mbfl_no_encoding_ucs2,
mbfl_no_encoding_ucs2be,
mbfl_no_encoding_ucs2le,
mbfl_no_encoding_utf32,
mbfl_no_encoding_utf32be,
mbfl_no_encoding_utf32le,
mbfl_no_encoding_utf16,
mbfl_no_encoding_utf16be,
mbfl_no_encoding_utf16le,
mbfl_no_encoding_utf8,
mbfl_no_encoding_utf8_docomo,
mbfl_no_encoding_utf8_kddi_a,
mbfl_no_encoding_utf8_kddi_b,
mbfl_no_encoding_utf8_sb,
mbfl_no_encoding_utf7,
mbfl_no_encoding_utf7imap,
mbfl_no_encoding_ascii,
mbfl_no_encoding_euc_jp,
mbfl_no_encoding_eucjp2004,
mbfl_no_encoding_sjis,
mbfl_no_encoding_eucjp_win,
mbfl_no_encoding_sjis_docomo,
mbfl_no_encoding_sjis_kddi,
mbfl_no_encoding_sjis_sb,
mbfl_no_encoding_sjis_mac,
mbfl_no_encoding_sjis2004,
mbfl_no_encoding_cp932,
mbfl_no_encoding_sjiswin,
mbfl_no_encoding_cp51932,
mbfl_no_encoding_jis,
mbfl_no_encoding_2022jp,
mbfl_no_encoding_2022jp_2004,
mbfl_no_encoding_2022jp_kddi,
mbfl_no_encoding_2022jpms,
mbfl_no_encoding_gb18030,
mbfl_no_encoding_gb18030_2022,
mbfl_no_encoding_cp1252,
mbfl_no_encoding_cp1254,
mbfl_no_encoding_8859_1,
mbfl_no_encoding_8859_2,
mbfl_no_encoding_8859_3,
mbfl_no_encoding_8859_4,
mbfl_no_encoding_8859_5,
mbfl_no_encoding_8859_6,
mbfl_no_encoding_8859_7,
mbfl_no_encoding_8859_8,
mbfl_no_encoding_8859_9,
mbfl_no_encoding_8859_10,
mbfl_no_encoding_8859_13,
mbfl_no_encoding_8859_14,
mbfl_no_encoding_8859_15,
mbfl_no_encoding_euc_cn,
mbfl_no_encoding_cp936,
mbfl_no_encoding_euc_tw,
mbfl_no_encoding_big5,
mbfl_no_encoding_cp950,
mbfl_no_encoding_euc_kr,
mbfl_no_encoding_2022kr,
mbfl_no_encoding_uhc,
mbfl_no_encoding_hz,
mbfl_no_encoding_cp1251,
mbfl_no_encoding_cp866,
mbfl_no_encoding_koi8r,
mbfl_no_encoding_koi8u,
mbfl_no_encoding_8859_16,
mbfl_no_encoding_armscii8,
mbfl_no_encoding_cp850,
mbfl_no_encoding_cp50220,
mbfl_no_encoding_cp50221,
mbfl_no_encoding_cp50222,
mbfl_no_encoding_charset_max
};
struct _mbfl_convert_filter;
struct mbfl_convert_vtbl {
enum mbfl_no_encoding from;
enum mbfl_no_encoding to;
void (*filter_ctor)(struct _mbfl_convert_filter *filter);
void (*filter_dtor)(struct _mbfl_convert_filter *filter);
int (*filter_function)(int c, struct _mbfl_convert_filter *filter);
int (*filter_flush)(struct _mbfl_convert_filter *filter);
void (*filter_copy)(struct _mbfl_convert_filter *src, struct _mbfl_convert_filter *dest);
};
typedef struct {
unsigned char *out;
unsigned char *limit;
uint32_t state;
uint32_t errors;
uint32_t replacement_char;
unsigned int error_mode;
zend_string *str;
} mb_convert_buf;
typedef size_t (*mb_to_wchar_fn)(unsigned char **in, size_t *in_len, uint32_t *out, size_t out_len, unsigned int *state);
typedef void (*mb_from_wchar_fn)(uint32_t *in, size_t in_len, mb_convert_buf *out, bool end);
typedef bool (*mb_check_fn)(unsigned char *in, size_t in_len);
typedef zend_string* (*mb_cut_fn)(unsigned char *str, size_t from, size_t len, unsigned char *end);
/* When converting encoded text to a buffer of wchars (Unicode codepoints) using `mb_to_wchar_fn`,
* the buffer must be at least this size (to work with all supported text encodings) */
#define MBSTRING_MIN_WCHAR_BUFSIZE 5
static inline void mb_convert_buf_init(mb_convert_buf *buf, size_t initsize, uint32_t repl_char, unsigned int err_mode)
{
buf->state = buf->errors = 0;
buf->str = emalloc(_ZSTR_STRUCT_SIZE(initsize));
buf->out = (unsigned char*)ZSTR_VAL(buf->str);
buf->limit = buf->out + initsize;
buf->replacement_char = repl_char;
buf->error_mode = err_mode;
}
#define MB_CONVERT_BUF_ENSURE(buf, out, limit, needed) \
ZEND_ASSERT(out <= limit); \
if ((limit - out) < (needed)) { \
size_t oldsize = limit - (unsigned char*)ZSTR_VAL((buf)->str); \
size_t newsize = oldsize + MAX(oldsize >> 1, needed); \
zend_string *newstr = erealloc((buf)->str, _ZSTR_STRUCT_SIZE(newsize)); \
out = (unsigned char*)ZSTR_VAL(newstr) + (out - (unsigned char*)ZSTR_VAL((buf)->str)); \
limit = (unsigned char*)ZSTR_VAL(newstr) + newsize; \
(buf)->str = newstr; \
}
#define MB_CONVERT_BUF_STORE(buf, _out, _limit) (buf)->out = _out; (buf)->limit = _limit
#define MB_CONVERT_BUF_LOAD(buf, _out, _limit) _out = (buf)->out; _limit = (buf)->limit
#define MB_CONVERT_ERROR(buf, out, limit, bad_cp, conv_fn) \
MB_CONVERT_BUF_STORE(buf, out, limit); \
mb_illegal_output(bad_cp, conv_fn, buf); \
MB_CONVERT_BUF_LOAD(buf, out, limit)
static inline unsigned char* mb_convert_buf_add(unsigned char *out, char c)
{
*out++ = c;
return out;
}
static inline unsigned char* mb_convert_buf_add2(unsigned char *out, char c1, char c2)
{
*out++ = c1;
*out++ = c2;
return out;
}
static inline unsigned char* mb_convert_buf_add3(unsigned char *out, char c1, char c2, char c3)
{
*out++ = c1;
*out++ = c2;
*out++ = c3;
return out;
}
static inline unsigned char* mb_convert_buf_add4(unsigned char *out, char c1, char c2, char c3, char c4)
{
*out++ = c1;
*out++ = c2;
*out++ = c3;
*out++ = c4;
return out;
}
static inline unsigned char* mb_convert_buf_appends(unsigned char *out, const char *s)
{
while (*s) {
*out++ = *s++;
}
return out;
}
static inline unsigned char* mb_convert_buf_appendn(unsigned char *out, const char *s, size_t n)
{
while (n--) {
*out++ = *s++;
}
return out;
}
static inline zend_string* mb_convert_buf_result_raw(mb_convert_buf *buf)
{
ZEND_ASSERT(buf->out <= buf->limit);
zend_string *ret = buf->str;
/* See `zend_string_alloc` in zend_string.h */
GC_SET_REFCOUNT(ret, 1);
GC_TYPE_INFO(ret) = GC_STRING;
ZSTR_H(ret) = 0;
ZSTR_LEN(ret) = buf->out - (unsigned char*)ZSTR_VAL(ret);
*(buf->out) = '\0';
return ret;
}
typedef struct {
enum mbfl_no_encoding no_encoding;
const char *name;
const char *mime_name;
const char **aliases;
const unsigned char *mblen_table;
unsigned int flag;
const struct mbfl_convert_vtbl *input_filter;
const struct mbfl_convert_vtbl *output_filter;
mb_to_wchar_fn to_wchar;
mb_from_wchar_fn from_wchar;
mb_check_fn check;
mb_cut_fn cut;
} mbfl_encoding;
extern const mbfl_encoding mbfl_encoding_utf8;
static inline zend_string* mb_convert_buf_result(mb_convert_buf *buf, const mbfl_encoding *enc)
{
zend_string *ret = mb_convert_buf_result_raw(buf);
if (enc == &mbfl_encoding_utf8 && buf->error_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_BADUTF8) {
GC_ADD_FLAGS(ret, IS_STR_VALID_UTF8);
}
return ret;
}
/* Used if we initialize an `mb_convert_buf` but then discover we don't actually
* want to return `zend_string` */
static inline void mb_convert_buf_free(mb_convert_buf *buf)
{
efree(buf->str);
}
static inline size_t mb_convert_buf_len(mb_convert_buf *buf)
{
return buf->out - (unsigned char*)ZSTR_VAL(buf->str);
}
static inline void mb_convert_buf_reset(mb_convert_buf *buf, size_t len)
{
buf->out = (unsigned char*)ZSTR_VAL(buf->str) + len;
ZEND_ASSERT(buf->out <= buf->limit);
}
MBFLAPI extern const mbfl_encoding *mbfl_name2encoding(const char *name);
MBFLAPI extern const mbfl_encoding *mbfl_name2encoding_ex(const char *name, size_t name_len);
MBFLAPI extern const mbfl_encoding *mbfl_no2encoding(enum mbfl_no_encoding no_encoding);
MBFLAPI extern const mbfl_encoding **mbfl_get_supported_encodings(void);
MBFLAPI extern const char *mbfl_no_encoding2name(enum mbfl_no_encoding no_encoding);
MBFLAPI extern const char *mbfl_encoding_preferred_mime_name(const mbfl_encoding *encoding);
#endif /* MBFL_ENCODING_H */
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