1 /* Character set conversion.
2 Copyright (C) 1999-2001, 2007 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public License along
15 with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
31 # define uintptr_t unsigned long
37 /* UTF-{16,32}{BE,LE} converters taken from GNU libiconv 1.11. */
39 /* Return code if invalid. (xxx_mbtowc) */
41 /* Return code if no bytes were read. (xxx_mbtowc) */
42 # define RET_TOOFEW -2
44 /* Return code if invalid. (xxx_wctomb) */
46 /* Return code if output buffer is too small. (xxx_wctomb, xxx_reset) */
47 # define RET_TOOSMALL -2
53 /* Specification: RFC 2781 */
56 utf16be_mbtowc (ucs4_t
*pwc
, const unsigned char *s
, size_t n
)
60 ucs4_t wc
= (s
[0] << 8) + s
[1];
61 if (wc
>= 0xd800 && wc
< 0xdc00)
65 ucs4_t wc2
= (s
[2] << 8) + s
[3];
66 if (!(wc2
>= 0xdc00 && wc2
< 0xe000))
68 *pwc
= 0x10000 + ((wc
- 0xd800) << 10) + (wc2
- 0xdc00);
72 else if (wc
>= 0xdc00 && wc
< 0xe000)
86 utf16be_wctomb (unsigned char *r
, ucs4_t wc
, size_t n
)
88 if (!(wc
>= 0xd800 && wc
< 0xe000))
94 r
[0] = (unsigned char) (wc
>> 8);
95 r
[1] = (unsigned char) wc
;
101 else if (wc
< 0x110000)
105 ucs4_t wc1
= 0xd800 + ((wc
- 0x10000) >> 10);
106 ucs4_t wc2
= 0xdc00 + ((wc
- 0x10000) & 0x3ff);
107 r
[0] = (unsigned char) (wc1
>> 8);
108 r
[1] = (unsigned char) wc1
;
109 r
[2] = (unsigned char) (wc2
>> 8);
110 r
[3] = (unsigned char) wc2
;
124 /* Specification: RFC 2781 */
127 utf16le_mbtowc (ucs4_t
*pwc
, const unsigned char *s
, size_t n
)
131 ucs4_t wc
= s
[0] + (s
[1] << 8);
132 if (wc
>= 0xd800 && wc
< 0xdc00)
136 ucs4_t wc2
= s
[2] + (s
[3] << 8);
137 if (!(wc2
>= 0xdc00 && wc2
< 0xe000))
139 *pwc
= 0x10000 + ((wc
- 0xd800) << 10) + (wc2
- 0xdc00);
143 else if (wc
>= 0xdc00 && wc
< 0xe000)
157 utf16le_wctomb (unsigned char *r
, ucs4_t wc
, size_t n
)
159 if (!(wc
>= 0xd800 && wc
< 0xe000))
165 r
[0] = (unsigned char) wc
;
166 r
[1] = (unsigned char) (wc
>> 8);
172 else if (wc
< 0x110000)
176 ucs4_t wc1
= 0xd800 + ((wc
- 0x10000) >> 10);
177 ucs4_t wc2
= 0xdc00 + ((wc
- 0x10000) & 0x3ff);
178 r
[0] = (unsigned char) wc1
;
179 r
[1] = (unsigned char) (wc1
>> 8);
180 r
[2] = (unsigned char) wc2
;
181 r
[3] = (unsigned char) (wc2
>> 8);
195 /* Specification: Unicode 3.1 Standard Annex #19 */
198 utf32be_mbtowc (ucs4_t
*pwc
, const unsigned char *s
, size_t n
)
202 ucs4_t wc
= (s
[0] << 24) + (s
[1] << 16) + (s
[2] << 8) + s
[3];
203 if (wc
< 0x110000 && !(wc
>= 0xd800 && wc
< 0xe000))
215 utf32be_wctomb (unsigned char *r
, ucs4_t wc
, size_t n
)
217 if (wc
< 0x110000 && !(wc
>= 0xd800 && wc
< 0xe000))
222 r
[1] = (unsigned char) (wc
>> 16);
223 r
[2] = (unsigned char) (wc
>> 8);
224 r
[3] = (unsigned char) wc
;
237 /* Specification: Unicode 3.1 Standard Annex #19 */
240 utf32le_mbtowc (ucs4_t
*pwc
, const unsigned char *s
, size_t n
)
244 ucs4_t wc
= s
[0] + (s
[1] << 8) + (s
[2] << 16) + (s
[3] << 24);
245 if (wc
< 0x110000 && !(wc
>= 0xd800 && wc
< 0xe000))
257 utf32le_wctomb (unsigned char *r
, ucs4_t wc
, size_t n
)
259 if (wc
< 0x110000 && !(wc
>= 0xd800 && wc
< 0xe000))
263 r
[0] = (unsigned char) wc
;
264 r
[1] = (unsigned char) (wc
>> 8);
265 r
[2] = (unsigned char) (wc
>> 16);
278 rpl_iconv (iconv_t cd
,
279 ICONV_CONST
char **inbuf
, size_t *inbytesleft
,
280 char **outbuf
, size_t *outbytesleft
)
283 #if REPLACE_ICONV_UTF
284 switch ((uintptr_t) cd
)
287 int (*xxx_wctomb
) (unsigned char *, ucs4_t
, size_t);
289 case (uintptr_t) _ICONV_UTF8_UTF16BE
:
290 xxx_wctomb
= utf16be_wctomb
;
292 case (uintptr_t) _ICONV_UTF8_UTF16LE
:
293 xxx_wctomb
= utf16le_wctomb
;
295 case (uintptr_t) _ICONV_UTF8_UTF32BE
:
296 xxx_wctomb
= utf32be_wctomb
;
298 case (uintptr_t) _ICONV_UTF8_UTF32LE
:
299 xxx_wctomb
= utf32le_wctomb
;
303 if (inbuf
== NULL
|| *inbuf
== NULL
)
306 ICONV_CONST
char *inptr
= *inbuf
;
307 size_t inleft
= *inbytesleft
;
308 char *outptr
= *outbuf
;
309 size_t outleft
= *outbytesleft
;
314 int m
= u8_mbtoucr (&uc
, (const uint8_t *) inptr
, inleft
);
333 int n
= xxx_wctomb ((uint8_t *) outptr
, uc
, outleft
);
342 if (n
== RET_TOOSMALL
)
360 *inbytesleft
= inleft
;
362 *outbytesleft
= outleft
;
368 int (*xxx_mbtowc
) (ucs4_t
*, const unsigned char *, size_t);
370 case (uintptr_t) _ICONV_UTF16BE_UTF8
:
371 xxx_mbtowc
= utf16be_mbtowc
;
373 case (uintptr_t) _ICONV_UTF16LE_UTF8
:
374 xxx_mbtowc
= utf16le_mbtowc
;
376 case (uintptr_t) _ICONV_UTF32BE_UTF8
:
377 xxx_mbtowc
= utf32be_mbtowc
;
379 case (uintptr_t) _ICONV_UTF32LE_UTF8
:
380 xxx_mbtowc
= utf32le_mbtowc
;
384 if (inbuf
== NULL
|| *inbuf
== NULL
)
387 ICONV_CONST
char *inptr
= *inbuf
;
388 size_t inleft
= *inbytesleft
;
389 char *outptr
= *outbuf
;
390 size_t outleft
= *outbytesleft
;
395 int m
= xxx_mbtowc (&uc
, (const uint8_t *) inptr
, inleft
);
414 int n
= u8_uctomb ((uint8_t *) outptr
, uc
, outleft
);
441 *inbytesleft
= inleft
;
443 *outbytesleft
= outleft
;
449 return iconv (cd
, inbuf
, inbytesleft
, outbuf
, outbytesleft
);