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utf8.h
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utf8.h
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/* public domain Simple, Minimalistic, UTF8 decoder and encoder library
* ©2022 Yuichiro Nakada
* http://www.ne.jp/asahi/maoyam/hp/UTF-8/
* */
/***********************************************************************
* File: utf8.h
* (Extracted from
* "$Id: utf8.h,v 1.2 2009/05/30 15:34:08 maoyam Exp maoyam $")
*
* Abstracts:
* This C header defines prototyping for the UTF-8 character decoder
* and encoder.
*
* Copyright (C) 2008 Maoyam Tokyo, Japan (mailto:maoyam@mail.goo.ne.jp)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
**********************************************************************/
#ifndef _UTF8_H_ /* { */
#define _UTF8_H_
#ifdef __cplusplus
extern "C" {
#endif
/*
* including the system definitions
*/
#include <unistd.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <iconv.h>
#include <errno.h>
typedef enum Sanitize_for_UTF8_e { /* the source is encoded in... */
Sanitize_for_UTF8_e_Zero = 0
, Sanitize_for_UTF8_e_EUC_JISX0213 /* "EUCJP-JISX0213" */
, Sanitize_for_UTF8_e_EUCJP_OPEN /* "EUCJP-OPEN" */
, Sanitize_for_UTF8_e_EUCJP_WIN /* "EUCJP-WIN" */
, Sanitize_for_UTF8_e_EUCJP_MS /* "EUCJP-MS" */
, Sanitize_for_UTF8_e_EUCJP /* "EUCJP" */
, Sanitize_for_UTF8_e_SJIS_OPEN /* "SJIS-OPEN" (-> "EUCJP-OPEN") */
, Sanitize_for_UTF8_e_SJIS_WIN /* "SJIS-WIN" (-> "EUCJP_WIN") */
, Sanitize_for_UTF8_e_SJIS /* "SJIS" (-> "SJIS") */
, Sanitize_for_UTF8_e_N /* number of the source encoding. */
} Sanitize_for_UTF8_e;
/* translate `str_encoding' to iconv_open(3)'s encode identifier */
#define Sanitize_for_UTF8_e_To_iconv_open_id(STR_ENCODING) ( \
((STR_ENCODING) == Sanitize_for_UTF8_e_EUC_JISX0213)? \
"EUCJP-JISX0213" \
: (((STR_ENCODING) == Sanitize_for_UTF8_e_EUCJP_OPEN)? \
"EUCJP-OPEN" \
: (((STR_ENCODING) == Sanitize_for_UTF8_e_EUCJP_WIN)? \
"EUCJP-WIN" \
: (((STR_ENCODING) == Sanitize_for_UTF8_e_EUCJP_MS)? \
"EUCJP-MS" \
: (((STR_ENCODING) == Sanitize_for_UTF8_e_EUCJP)? \
"EUCJP" \
: (((STR_ENCODING) == Sanitize_for_UTF8_e_SJIS_OPEN)? \
"SJIS-OPEN" \
: (((STR_ENCODING) == Sanitize_for_UTF8_e_SJIS_WIN)? \
"SJIS-WIN" \
: (((STR_ENCODING) == Sanitize_for_UTF8_e_SJIS)? \
"SJIS" \
: NULL \
))))))))
/* iconv_open(3)'s identifier of UTF-8 */
#define Sanitize_for_UTF8_iconv_open_id "UTF-8"
/* `how' arguments are the logical-or-ed the followings...
* (default, to_utf8() converts Yen-sign (\x5c) to UTF-8 "\xc2\xa5 U+00A5",
* convert tilde (0x7e) to UTF-8 "\x7e"), replace the hankaku-kana with
* `replace_code' character, and replace the machine-depended Chinese
* character with `replace_code'.)
*/
#define Sanitize_for_UTF8_Default_how (0UL)
#define Sanitize_for_UTF8_Yen_sign_must_be_U005C (1UL)
#define Sanitize_for_UTF8_Tilde_must_be_U203E (2UL)
#define Sanitize_for_UTF8_Pass_hankaku_kana (4UL)
#define Sanitize_for_UTF8_Pass_extra_characters (8UL)
#define Sanitize_for_UTF8_Set_all ( \
Sanitize_for_UTF8_Default_how \
| Sanitize_for_UTF8_Yen_sign_must_be_U005C \
| Sanitize_for_UTF8_Tilde_must_be_U203E \
| Sanitize_for_UTF8_Pass_hankaku_kana \
| Sanitize_for_UTF8_Pass_extra_characters \
)
typedef unsigned char uint8_t;
/* this function sanitizes a string (safer UTF-8 encoding)
* if error occurred, this returns NULL and set `errno'.
* EINVAL means "illegal arguments".
*/
extern uint8_t /*@null@*/ *sanitize_for_utf8(
Sanitize_for_UTF8_e src_encode
, size_t length
, uint8_t *str
, char replace_code
, unsigned long how
);
/* convert the EUC-JP or SJIS encoded string to UTF-8 encoded.
* if error occurred, this returns NULL and set `errno'.
* EINVAL means "illegal arguments".
* ENOMEM means "insufficient memory".
* EPERM means "system not support EUC-JP, SJIS or UTF-8 encode".
* EILSEQ means "`inbuf' contains illegal character".
*/
extern uint8_t /*@null@*/ *to_utf8(Sanitize_for_UTF8_e inbuf_encode
, const uint8_t *inbuf
, size_t inbuf_length
, char replace_code
, uint8_t *outbuf
, size_t outbuf_size
, char padding_code
, unsigned long how
);
/* convert the EUC-JP or SJIS encoded string to UTF-8 encoded.
* if error occurred, this returns NULL and set `errno'.
* EINVAL means "illegal arguments".
* ENOMEM means "insufficient memory".
* EPERM means "system not support EUC-JP, SJIS or UTF-8 encode".
* EILSEQ means "`inbuf' contains illegal character".
*/
extern uint8_t /*@null@*/ *from_utf8(
Sanitize_for_UTF8_e outbuf_encode
, uint8_t *inbuf
, size_t inbuf_length
, uint8_t *outbuf
, size_t outbuf_size
, char padding_code
);
#ifdef __cplusplus
}
#endif
#endif /* } (!defined(_UTF8_H_) */
/***********************************************************************
* File: utf8.c
* (Extracted from
* "$Id: utf8.c,v 1.2 2009/05/30 15:34:08 maoyam Exp maoyam $")
*
* Abstracts:
* This C source implements a character converter between UTF-8 and
* EUC-JP/SJIS.
*
* Copyright (C) 2008 Maoyam Tokyo, Japan (mailto:maoyam@mail.goo.ne.jp)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
**********************************************************************/
/* include this library definitions */
//#include "utf8.h"
typedef struct garbled_characters_t {
unsigned long how; /* mask of `how' argument (if the bit's off,
* replace the character class)
*/
uint8_t *from, *to; /* set range of garbled code region */
} Garbled_characters_t;
/* this is the comparison of `Garbled_characters_t' array, for `bsearch(3).
*/
static int cmp_Garbled_characters_t(const void *ap, const void *bp)
{
Garbled_characters_t *key, *gap;
int result;
if (((Garbled_characters_t *)ap)->to == NULL) {
key = (Garbled_characters_t *)ap; gap = (Garbled_characters_t *)bp;
}
else {
key = (Garbled_characters_t *)bp; gap = (Garbled_characters_t *)ap;
}
if ((((key->how & gap->how) != 0UL)
|| key->from == NULL)
|| memcmp(key->from, gap->from, 2) < 0
) {
result = -1;
}
else if (memcmp(key->from, gap->to, 2) > 0) {
result = 1;
}
else {
result = 0; /* the `str' will be garbled. */
}
return result;
}
/* this function implements how to sanitizes a string (safer UTF-8
* encoding). if error occurred, this returns NULL and set `errno'.
* ENOMEM means "insufficient memory".
*/
static uint8_t /*@null@*/ *get_sanitized(
Sanitize_for_UTF8_e str_encoding
, size_t length
, uint8_t *str
, size_t outstr_size
, /*@null@*/ uint8_t *outstr
, char replace_code
, unsigned long how
)
{
static Garbled_characters_t
eucjp_garbled[] = {
{ /* JIS X 0201 (Kana) 21 to 5F */
Sanitize_for_UTF8_Pass_hankaku_kana
, (uint8_t *)"\x8e\x21", (uint8_t *)"\x8e\x5f"
}
, { /* JIS X 0208 (level 1) 02-15 to 02-25 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa2\xaf", (uint8_t *)"\xa2\xb9"
}
, { /* JIS X 0208 (level 1) 02-34 to 02-41 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa2\xc2", (uint8_t *)"\xa2\xc9"
}
, { /* JIS X 0208 (level 1) 02-49 to 02-59 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa2\xd1", (uint8_t *)"\xa2\xdb"
}
, { /* JIS X 0208 (level 1) 02-75 to 02-81 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa2\xeb", (uint8_t *)"\xa2\xf1"
}
, { /* JIS X 0208 (level 1) 02-90 to 02-93 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa2\xfa", (uint8_t *)"\xa2\xfd"
}
, { /* JIS X 0208 (level 1) 03-01 to 03-15 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa3\xa1", (uint8_t *)"\xa3\xaf"
}
, { /* JIS X 0208 (level 1) 03-26 to 03-32 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa3\xba", (uint8_t *)"\xa3\xc0"
}
, { /* JIS X 0208 (level 1) 03-59 to 03-64 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa3\xdb", (uint8_t *)"\xa3\xe0"
}
, { /* JIS X 0208 (level 1) 03-91 to 03-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa3\xfb", (uint8_t *)"\xa3\xfe"
}
, { /* JIS X 0208 (level 1) 04-84 to 04-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa4\xf4", (uint8_t *)"\xa4\xfe"
}
, { /* JIS X 0208 (level 1) 05-87 to 05-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa5\xf7", (uint8_t *)"\xa5\xfe"
}
, { /* JIS X 0208 (level 1) 06-25 to 06-32 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa6\xb9", (uint8_t *)"\xa6\xc0"
}
, { /* JIS X 0208 (level 1) 06-57 to 06-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa6\xd9", (uint8_t *)"\xa6\xfe"
}
, { /* JIS X 0208 (level 1) 07-34 to 07-47 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa7\xc2", (uint8_t *)"\xa7\xd0"
}
, { /* JIS X 0208 (level 1) 07-82 to 07-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa7\xf2", (uint8_t *)"\xa7\xfe"
}
, { /* JIS X 0208 (level 1) 08-33 to 08-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa8\xc1", (uint8_t *)"\xa8\xfe"
}
, { /* JIS X 0208 (level 1) 09-01 to 09-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xa9\xa1", (uint8_t *)"\xa9\xfe"
}
, { /* JIS X 0208 (level 1) 10-01 to 10-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xaa\xa1", (uint8_t *)"\xaa\xfe"
}
, { /* JIS X 0208 (level 1) 11-01 to 11-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xab\xa1", (uint8_t *)"\xab\xfe"
}
, { /* JIS X 0208 (level 1) 12-01 to 12-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xac\xa1", (uint8_t *)"\xac\xfe"
}
, { /* JIS X 0208 (level 1) 13-01 to 13-94 (circled digits, etc) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xad\xa1", (uint8_t *)"\xad\xfe"
}
, { /* JIS X 0208 (level 1) 14-01 to 14-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xae\xa1", (uint8_t *)"\xae\xfe"
}
, { /* JIS X 0208 (level 1) 15-01 to 15-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xaf\xa1", (uint8_t *)"\xaf\xfe"
}
, { /* JIS X 0208 (level 1) 47-52 to 47-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xcf\xd4", (uint8_t *)"\xcf\xfe"
}
, { /* JIS X 0208 (level 2) 84-07 to 84-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xf4\xa7", (uint8_t *)"\xf4\xfe"
}
, { /* JIS X 0208 (level 2) 85-01 to 85-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xf5\xa1", (uint8_t *)"\xf5\xfe"
}
, { /* JIS X 0208 (level 2) 86-01 to 86-94 (JIS not assigned) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xf6\xa1", (uint8_t *)"\xf6\xfe"
}
, { /* JIS X 0208 (level 2) 87-01 to 87-94 (JIS not assigned) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xf7\xa1", (uint8_t *)"\xf7\xfe"
}
, { /* JIS X 0208 (level 2) 88-01 to 88-94 (JIS not assigned) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xf8\xa1", (uint8_t *)"\xf8\xfe"
}
, { /* JIS X 0208 (level 2) 89-01 to 89-94 (Debian garbled) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xf9\xa1", (uint8_t *)"\xf9\xfe"
}
, { /* JIS X 0208 (level 2) 90-01 to 90-94 (Debian garbled) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xfa\xa1", (uint8_t *)"\xfa\xfe"
}
, { /* JIS X 0208 (level 2) 91-01 to 91-94 (Debian garbled) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xfb\xa1", (uint8_t *)"\xfb\xfe"
}
, { /* JIS X 0208 (level 2) 92-01 to 92-94 (Debian garbled) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xfc\xa1", (uint8_t *)"\xfc\xfe"
}
, { /* JIS X 0208 (level 2) 93-01 to 93-94 (JIS not assigned) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xfd\xa1", (uint8_t *)"\xfd\xfe"
}
, { /* JIS X 0208 (level 2) 94-01 to 94-94 (JIS not assigned) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xfe\xa1", (uint8_t *)"\xfe\xfe"
}
}
, sjis_garbled[] = {
{ /* JIS X 0208 (level 1) 02-15 to 02-25 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x81\xad", (uint8_t *)"\x81\xb7"
}
, { /* JIS X 0208 (level 1) 02-34 to 02-41 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x81\xc0", (uint8_t *)"\x81\xc7"
}
, { /* JIS X 0208 (level 1) 02-49 to 02-59 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x81\xcf", (uint8_t *)"\x81\xd9"
}
, { /* JIS X 0208 (level 1) 02-75 to 02-81 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x81\xe9", (uint8_t *)"\x81\xef"
}
, { /* JIS X 0208 (level 1) 02-90 to 02-93 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x81\xf8", (uint8_t *)"\x81\xfb"
}
, { /* JIS X 0208 (level 1) 03-01 to 03-15 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x82\x40", (uint8_t *)"\x82\x4e"
}
, { /* JIS X 0208 (level 1) 03-26 to 03-32 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x82\x59", (uint8_t *)"\x82\x5f"
}
, { /* JIS X 0208 (level 1) 03-59 to 03-64 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x82\x7a", (uint8_t *)"\x82\x80"
}
, { /* JIS X 0208 (level 1) 03-91 to 03-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x82\x9b", (uint8_t *)"\x82\x9e"
}
, { /* JIS X 0208 (level 1) 04-84 to 04-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x82\xf2", (uint8_t *)"\x82\xfc"
}
, { /* JIS X 0208 (level 1) 05-87 to 05-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x83\x97", (uint8_t *)"\x83\x9e"
}
, { /* JIS X 0208 (level 1) 06-25 to 06-32 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x83\xb7", (uint8_t *)"\x83\xbe"
}
, { /* JIS X 0208 (level 1) 06-57 to 06-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x83\xd7", (uint8_t *)"\x83\xfc"
}
, { /* JIS X 0208 (level 1) 07-34 to 07-48 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x84\x61", (uint8_t *)"\x84\x6f"
}
, { /* JIS X 0208 (level 1) 07-82 to 07-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x84\x92", (uint8_t *)"\x84\x9e"
}
, { /* JIS X 0208 (level 1) 08-33 to 08-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x84\xbf", (uint8_t *)"\x84\xfc"
}
, { /* JIS X 0208 (level 1) 09-01 to 09-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x85\x40", (uint8_t *)"\x85\x9e"
}
, { /* JIS X 0208 (level 1) 10-01 to 10-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x85\x9f", (uint8_t *)"\x85\xfc"
}
, { /* JIS X 0208 (level 1) 11-01 to 11-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x86\x40", (uint8_t *)"\x86\x9e"
}
, { /* JIS X 0208 (level 1) 12-01 to 12-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x86\x9f", (uint8_t *)"\x86\xfc"
}
, { /* JIS X 0208 (level 1) 13-01 to 13-94 (circled digits, etc) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x87\x40", (uint8_t *)"\x87\x9e"
}
, { /* JIS X 0208 (level 1) 14-01 to 14-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x87\x9f", (uint8_t *)"\x87\xfc"
}
, { /* JIS X 0208 (level 1) 15-01 to 15-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x88\x40", (uint8_t *)"\x88\x9e"
}
, { /* JIS X 0208 (level 1) 47-52 to 47-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\x98\x73", (uint8_t *)"\x98\x9e"
}
, { /* JIS X 0208 (level 2) 84-07 to 84-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xea\xa5", (uint8_t *)"\xea\xfc"
}
, { /* JIS X 0208 (level 2) 85-01 to 85-94 */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xeb\x40", (uint8_t *)"\xeb\x9e"
}
, { /* JIS X 0208 (level 2) 86-01 to 86-94 (JIS not assigned) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xeb\x9f", (uint8_t *)"\xeb\xfc"
}
, { /* JIS X 0208 (level 2) 87-01 to 87-94 (JIS not assigned) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xec\x40", (uint8_t *)"\xec\x9e"
}
, { /* JIS X 0208 (level 2) 88-01 to 88-94 (JIS not assigned) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xec\x9f", (uint8_t *)"\xec\xfc"
}
, { /* JIS X 0208 (level 2) 89-01 to 89-94 (Debian garbled) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xed\x40", (uint8_t *)"\xed\x9e"
}
, { /* JIS X 0208 (level 2) 90-01 to 90-94 (Debian garbled) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xed\x9f", (uint8_t *)"\xed\xfc"
}
, { /* JIS X 0208 (level 2) 91-01 to 91-94 (Debian garbled) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xee\x40", (uint8_t *)"\xee\x9e"
}
, { /* JIS X 0208 (level 2) 92-01 to 92-94 (Debian garbled) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xee\x9f", (uint8_t *)"\xee\xfc"
}
, { /* JIS X 0208 (level 2) 93-01 to 93-94 (JIS not assigned) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xef\x40", (uint8_t *)"\xef\x9e"
}
, { /* JIS X 0208 (level 2) 94-01 to 94-94 (JIS not assigned) */
Sanitize_for_UTF8_Pass_extra_characters
, (uint8_t *)"\xef\x9f", (uint8_t *)"\xef\xfc"
}
};
struct garbled_characters_t *garbled, *gap;
Garbled_characters_t key;
uint8_t *result;
size_t size, nmemb;
/* invoker needs the allocated memory of sanitized string? */
if (outstr == NULL) {
if ((outstr = malloc((length + 1))) == NULL) {
/* Error: can't allocate sanitized string. */
errno = ENOMEM; return NULL; /* insufficient memory */
}
memset(outstr, (int)'\0', (length + 1));
}
result = outstr;
/* set table of `garbled' code */
if (str_encoding <= Sanitize_for_UTF8_e_EUCJP) {
garbled = eucjp_garbled
; nmemb = (sizeof(eucjp_garbled)/ sizeof(eucjp_garbled[0]))
;
}
else {
garbled = sjis_garbled
; nmemb = (sizeof(sjis_garbled)/ sizeof(sjis_garbled[0]))
;
}
/* process the source string... */
while (((outstr_size > 0) && length > 0) && *str != (uint8_t)'\0')
{
if (*str <= (uint8_t)0x7f) {
/* leave the ASCII (0x01 to 0x7d, 0x7f) and C0-control codes */
*outstr = *str
; ++outstr; --outstr_size; ++str; --length
; continue
;
}
/* process extra codes (according to the each source encoding) */
if (str_encoding <= Sanitize_for_UTF8_e_EUCJP) {
if (*str == (uint8_t)0x8f) {
/* replace EUC-JP extra code (three bytes are started
* '\x8f') using `replace_code (ASCII code)', or pass
* the EUC-JP extra code (3 bytes).
*/
size = ((outstr_size < 3)? outstr_size: 3);
if (((how & Sanitize_for_UTF8_Pass_extra_characters) == 0UL)
|| size < 3
) {
memset(outstr, (int)replace_code, size);
}
else {
if (outstr != str) { memcpy(outstr, str, size); }
}
outstr += size; outstr_size -= size
; str += size; length -= size
; continue
;
}
}
else if (str_encoding <= Sanitize_for_UTF8_e_SJIS) {
if ((*str >= (uint8_t)0xa1)
&& *str <= (uint8_t)0xdf
) { /* replace the SJIS hankaku-kana code (single byte) */
*outstr = (((how & Sanitize_for_UTF8_Pass_hankaku_kana)
== 0UL)?
(uint8_t)replace_code
: *str
);
; ++outstr; --outstr_size; ++str; --length; continue
;
}
}
/* check left length */
if (outstr_size < 2) {
/* process the last one byte
* replace the non-ASCII code, or pass the ASCII code.
*/
*outstr = ((*str > (uint8_t)0x7f)?
(uint8_t)replace_code
: *str
);
++outstr; --outstr_size; ++str; --length
; continue
;
}
/* check and process the two bytes... */
size = 2
; key.how = how; key.from = str; key.to = NULL
; gap = (Garbled_characters_t *)bsearch((const void *)(&key)
, garbled
, nmemb
, sizeof(*garbled)
, cmp_Garbled_characters_t
);
if (gap != NULL) {
/* replace garbled code, using `replace_code (ASCII code)' */
memset(outstr, (int)replace_code, size);
}
else {
/* pass the wide character */
if (outstr != str) { memcpy(outstr, str, size); }
}
outstr += size; outstr_size -= size; str += size; length -= size;
}
/* terminate the `outstr' string */
if (outstr_size > 0) {
*outstr = (uint8_t)'\0';
}
return result; /* processed normally */
}
/* this function sanitizes a string (safer UTF-8 encoding)
* if error occurred, this returns NULL and set `errno'.
* EINVAL means "illegal arguments".
*/
uint8_t *sanitize_for_utf8(Sanitize_for_UTF8_e str_encoding
, size_t length
, uint8_t *str
, char replace_code
, unsigned long how
)
{
if (((((str_encoding <= Sanitize_for_UTF8_e_Zero
|| str_encoding >= Sanitize_for_UTF8_e_N)
|| str == NULL)
|| replace_code <= (char)'\0')
|| (how & ~Sanitize_for_UTF8_Set_all) != 0UL)
) { /* ERROR: illegal argument */
/* invalid arguments */
errno = EINVAL; return (uint8_t *)NULL;
}
return get_sanitized(str_encoding
, length
, str
, length
, str
, replace_code
, how
);
}
/* convert the EUC-JP or SJIS encoded string to UTF-8 encoded.
* if error occurred, this returns NULL and set `errno'.
* EINVAL means "illegal arguments".
* ENOMEM means "insufficient memory".
* EPERM means "system not support EUC-JP, SJIS or UTF-8 encode".
* EILSEQ means "`inbuf' contains illegal character".
*/
uint8_t *to_utf8(Sanitize_for_UTF8_e inbuf_encode
, const uint8_t *inbuf
, size_t inbuf_length
, char replace_code
, uint8_t *outbuf
, size_t outbuf_size
, char padding_code
, unsigned long how
)
{
uint8_t *dup_inbuf = NULL, *inbufp = NULL
, *iconved_buf = NULL, *outbufp = NULL
, *result = NULL
;
iconv_t cd =(iconv_t)(-1);
size_t inbytesleft = inbuf_length, outbytesleft = outbuf_size;
char *tocode = NULL, *fromcode = NULL;
int sv_errno = 0;
if ((((((inbuf_encode <= Sanitize_for_UTF8_e_Zero)
|| inbuf_encode >= Sanitize_for_UTF8_e_N)
|| inbuf == NULL)
|| outbuf == NULL)
|| (how & ~Sanitize_for_UTF8_Set_all) != 0UL)
) { /* Error: argument is illegal. */
errno = EINVAL; return NULL; /* invalid arguments */
}
if (replace_code == '\0') {
replace_code = ' '; /* default replace_code is space (0x20) */
}
/* create convert-descriptor (EUC-JP or SJIS to UTF-8) */
tocode = Sanitize_for_UTF8_iconv_open_id
; fromcode = Sanitize_for_UTF8_e_To_iconv_open_id(inbuf_encode)
;
if ((cd = iconv_open((const char *)tocode, (const char *)fromcode))
== (iconv_t)(-1)
) { /* Error: system doesn't support EUC-JP, SJIS or UTF-8 encode. */
errno = EPERM; return NULL; /* system not supported */
}
/* allocate and initialize the iconv-ed buffer */
if ((iconved_buf = malloc(outbuf_size + 1)) == NULL) {
/* Error: can't allocate iconv-ed string. */
(void)iconv_close(cd); cd = (iconv_t)(-1);
errno = ENOMEM; return NULL; /* insufficient memory */
}
outbufp = memset(iconved_buf, (int)'\0', (outbuf_size + 1));
/* sanitize duplicated inbuf (for UTF-8) */
if ((dup_inbuf = get_sanitized(inbuf_encode
, inbuf_length
, (uint8_t *)inbuf
, inbuf_length
, NULL
, replace_code
, how
)) == NULL
) { /* Error: maybe, insufficient memory (errno == ENOMEM) */
(void)iconv_close(cd); cd = (iconv_t)(-1)
; free(iconved_buf); iconved_buf = NULL
; return NULL
;
}
inbufp = dup_inbuf;
/* (if dup_inbuf isn't empty) convert dup_inbuf to UTF-8 encode. */
sv_errno = errno; errno = 0 /* initialize `errno' */
;
if (((*inbufp != (uint8_t)'\0')
&& iconv(cd, (char **)(&inbufp), &inbytesleft
, (char **)(&outbufp), &outbytesleft
) == (size_t)(-1))
&& (errno == EILSEQ || errno == EINVAL)
) { /* Error: `inbuf' contains illegal character (EUC-JP or SJIS) */
errno = EILSEQ; /* found illegal sequence in `inbuf' */
}
else { /* process the UTF-8 encode string (iconved_buf) */
uint8_t *inbp = iconved_buf, *outbp = outbuf;
for (result = outbuf, outbytesleft = outbuf_size
; (*inbp != (uint8_t)'\0') && outbytesleft > 0
;
) {
size_t move_size;
/* replace Yen-sign to UTF-8's 'Yen' code ("\xc2\xa5"),
* or replace Yen-sign to UTF-8's `backslash' code ("\x5c")
*/
if (((how & Sanitize_for_UTF8_Yen_sign_must_be_U005C) == 0)
&& *inbp == (uint8_t)'\\'
) {
if (outbytesleft < 2) {
break; /* outbuf is insufficient left size */
}
memcpy(outbp, "\xc2\xa5", 2)
; ++inbp; outbp += 2; outbytesleft -= 2
; continue
;
}
if (((how & Sanitize_for_UTF8_Yen_sign_must_be_U005C) != 0)
&& memcmp(inbp, "\xc2\xa5", 2) == 0
) {
*outbp = (uint8_t)'\\'
; inbp += 2; ++outbp; --outbytesleft
; continue
;
}
/* replace UTF-8's tilde (3 bytes code) to ASCII's ('\x7e'),
* or replace ASCII tilde to UTF-8's (wide-character)
*/
if (((how & Sanitize_for_UTF8_Tilde_must_be_U203E) == 0)
&& memcmp(inbp, "\xe2\x80\xbe", 3) == 0
) {
*outbp = '\x7e'
; inbp += 3; ++outbp; --outbytesleft
; continue
;
}
if (((how & Sanitize_for_UTF8_Tilde_must_be_U203E) != 0)
&& *inbp == (uint8_t)'\x7e'
) {
if (outbytesleft < 3) {
break; /* outbuf is insufficient left size */
}
memcpy(outbp, "\xe2\x80\xbe", 3)
; ++inbp ; outbp += 3; outbytesleft -= 3
; continue
;
}
/* get the each size of UTF-8 characters (from 1 to 6 bytes) */
if ((*inbp & (uint8_t)0x80) == (uint8_t)0)
{ move_size = 1; }
else if ((*inbp & (uint8_t)0xe0) == (uint8_t)0xc0)
{ move_size = 2; }
else if ((*inbp & (uint8_t)0xf0) == (uint8_t)0xe0)
{ move_size = 3; }
else if ((*inbp & (uint8_t)0xf8) == (uint8_t)0xf0)
{ move_size = 4; }
else if ((*inbp & (uint8_t)0xfc) == (uint8_t)0xf8)
{ move_size = 5; }
else if ((*inbp & (uint8_t)0xfe) == (uint8_t)0xfc)
{ move_size = 6; }
else { /* Error: found illegal sequence in UTF-8 string */
errno = EILSEQ; result = (uint8_t *)NULL
; break /* illegal sequence */
;
}
/* transfer a UTF-8 character to outbuf */
if (outbytesleft < move_size) {
break; /* insufficient left size of outbuf */
}
memcpy(outbp, inbp, move_size)
; inbp += move_size
; outbp += move_size; outbytesleft -= move_size
;
}
/* (if outbuf has left space) fill padding_code to outbuf */
if (outbytesleft > 0) {
memset(outbp, (int)padding_code, outbytesleft);
}
}
/* release convert-descriptor and allocated memories */
if (result == NULL) {
/* Error: occurred an error */
sv_errno = errno;
}
; (void)iconv_close(cd); cd = (iconv_t)(-1)
; free(dup_inbuf); dup_inbuf = NULL
; free(iconved_buf); iconved_buf = NULL
; errno = sv_errno /* restore `error' */
;
/* if error occurred, returns NULL. otherwise, returns address of outbuf
*/
return result;
}
/* convert the UTF-8 encoded string to EUC-JP or SJIS encoded.
* if error occurred, this returns NULL and set `errno'.
* EINVAL means "illegal arguments".
* ENOMEM means "insufficient memory".
* EPERM means "system not support EUC-JP, SJIS or UTF-8 encode".
* EILSEQ means "`inbuf' contains illegal character".
*/
uint8_t *from_utf8(Sanitize_for_UTF8_e outbuf_encode
, uint8_t *inbuf
, size_t inbuf_length
, uint8_t *outbuf
, size_t outbuf_size
, char padding_code
)
{
uint8_t *result = NULL, *reduced_inbuf = NULL, *inbufp = NULL
, *outbufp = NULL
;
iconv_t cd = (iconv_t)(-1);
size_t inbytesleft = inbuf_length, outbytesleft = outbuf_size;
char *fromcode = NULL, *tocode = NULL;
int sv_errno = errno;
if (((((outbuf_encode <= Sanitize_for_UTF8_e_Zero)
|| outbuf_encode >= Sanitize_for_UTF8_e_N)
|| inbuf == NULL)
|| outbuf == NULL)
) { /* Error: argument is illegal. */
errno = EINVAL; return NULL; /* invalid arguments */
}
/* create convert-descriptor (EUC-JP or SJIS to UTF-8) */
fromcode = Sanitize_for_UTF8_iconv_open_id
; tocode = Sanitize_for_UTF8_e_To_iconv_open_id(outbuf_encode)
;
if ((cd = iconv_open((const char *)tocode
, (const char *)fromcode
)) == (iconv_t)(-1)
) { /* Error: system doesn't support EUC-JP, SJIS or UTF-8 encode. */
errno = EPERM; return NULL; /* system not supported */
}
/* allocate the buffer of reduced `inbuf' */
if ((reduced_inbuf = malloc((inbuf_length + 1))) == NULL) {
/* Error: can't allocate duplicated buffer of `inbuf'. */
(void)iconv_close(cd); cd = (iconv_t)(-1);
errno = ENOMEM; return NULL; /* insufficient memory */
}
outbufp = memset(reduced_inbuf, (int)'\0', (inbuf_length + 1));
/* reduce redundant UTF-8 string. */
for (inbufp = inbuf
; (*inbuf != (uint8_t)'\0') && inbytesleft > 0
;
) {
if (*inbufp < (uint8_t)0x80) {
*outbufp = *inbufp
; ++outbufp; ++inbufp; --inbytesleft
; continue
;
}
else if (*inbufp < (uint8_t)0xc2) {
if (inbytesleft < 2) {
goto Illegal_sequence;
}
Reduce_1_byte:
*outbufp = ((0x40 & (*inbufp << 6)) | (*(inbufp + 1) & 0x3f))
; ++outbufp; inbufp += 2; inbytesleft -= 2
; continue
;
}
else if ((*inbufp & (uint8_t)0xe0) == (uint8_t)0xc0) {
if (inbytesleft < 2) {
goto Illegal_sequence;
}
memcpy((char *)outbufp, inbufp, 2)
; outbufp += 2; inbufp += 2; inbytesleft -= 2
; continue
;
}
else if (*inbufp == (uint8_t)0xe0) {
if (inbytesleft < 3) {
goto Illegal_sequence;
}
if (*(inbufp + 1) >= (uint8_t)0xa0) {
Transfer_3_bytes:
memcpy((char *)outbufp, inbufp, 3)
; outbufp += 3; inbufp += 3; inbytesleft -= 3
; continue
;
}
Reduce_2_bytes:
if (*(inbufp + 1) >= (uint8_t)0x82) {
*outbufp = (0xc0 | (*(inbufp + 1) & 0x1f))
; *(outbufp + 1) = *(inbufp + 2)
; outbufp += 2; inbufp += 3; inbytesleft -= 3
; continue
;
}
else {
++inbufp; --inbytesleft; goto Reduce_1_byte;
}
}
else if ((*inbufp & 0xf0) == (uint8_t)0xe0) {
if (inbytesleft < 3) {
goto Illegal_sequence;
}
goto Transfer_3_bytes;
}
else if (*inbufp == (uint8_t)0xf0) {
if (inbytesleft < 4) {
goto Illegal_sequence;
}
if (*(inbufp + 1) >= (uint8_t)0x90) {
Transfer_4_bytes:
memcpy((char *)outbufp, inbufp, 4)
; outbufp += 4; inbufp += 4; inbytesleft -= 4
; continue
;
}
Reduce_3_bytes:
if ((*(inbufp + 1) >= (uint8_t)0x81)
|| ((*(inbufp + 1) == (uint8_t)0x80)
&& *(inbufp + 2) >= (uint8_t)0xa0
)
) {
*outbufp = (0xe0 | (*(inbufp + 1) & 0x0f))
; memcpy((char *)(outbufp + 1), (inbufp + 2), 2)
; outbufp += 3; inbufp += 4; inbytesleft -= 4