Commit | Line | Data |
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24d56127 | 1 | /* Character set conversion. |
5e69ceb7 | 2 | Copyright (C) 1999-2001, 2007, 2009-2014 Free Software Foundation, Inc. |
24d56127 LC |
3 | |
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) | |
7 | any later version. | |
8 | ||
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. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public License along | |
005de2e8 | 15 | with this program; if not, see <http://www.gnu.org/licenses/>. */ |
24d56127 LC |
16 | |
17 | #include <config.h> | |
18 | ||
19 | /* Specification. */ | |
20 | #include <iconv.h> | |
21 | ||
22 | #include <stddef.h> | |
23 | ||
24 | #if REPLACE_ICONV_UTF | |
25 | # include <errno.h> | |
26 | # include <stdint.h> | |
27 | # include <stdlib.h> | |
28 | # include "unistr.h" | |
29 | # ifndef uintptr_t | |
30 | # define uintptr_t unsigned long | |
31 | # endif | |
32 | #endif | |
33 | ||
34 | #if REPLACE_ICONV_UTF | |
35 | ||
36 | /* UTF-{16,32}{BE,LE} converters taken from GNU libiconv 1.11. */ | |
37 | ||
38 | /* Return code if invalid. (xxx_mbtowc) */ | |
39 | # define RET_ILSEQ -1 | |
40 | /* Return code if no bytes were read. (xxx_mbtowc) */ | |
41 | # define RET_TOOFEW -2 | |
42 | ||
43 | /* Return code if invalid. (xxx_wctomb) */ | |
44 | # define RET_ILUNI -1 | |
45 | /* Return code if output buffer is too small. (xxx_wctomb, xxx_reset) */ | |
46 | # define RET_TOOSMALL -2 | |
47 | ||
48 | /* | |
49 | * UTF-16BE | |
50 | */ | |
51 | ||
52 | /* Specification: RFC 2781 */ | |
53 | ||
54 | static int | |
55 | utf16be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) | |
56 | { | |
57 | if (n >= 2) | |
58 | { | |
59 | ucs4_t wc = (s[0] << 8) + s[1]; | |
60 | if (wc >= 0xd800 && wc < 0xdc00) | |
1cd4fffc LC |
61 | { |
62 | if (n >= 4) | |
63 | { | |
64 | ucs4_t wc2 = (s[2] << 8) + s[3]; | |
65 | if (!(wc2 >= 0xdc00 && wc2 < 0xe000)) | |
66 | return RET_ILSEQ; | |
67 | *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00); | |
68 | return 4; | |
69 | } | |
70 | } | |
24d56127 | 71 | else if (wc >= 0xdc00 && wc < 0xe000) |
1cd4fffc LC |
72 | { |
73 | return RET_ILSEQ; | |
74 | } | |
24d56127 | 75 | else |
1cd4fffc LC |
76 | { |
77 | *pwc = wc; | |
78 | return 2; | |
79 | } | |
24d56127 LC |
80 | } |
81 | return RET_TOOFEW; | |
82 | } | |
83 | ||
84 | static int | |
85 | utf16be_wctomb (unsigned char *r, ucs4_t wc, size_t n) | |
86 | { | |
87 | if (!(wc >= 0xd800 && wc < 0xe000)) | |
88 | { | |
89 | if (wc < 0x10000) | |
1cd4fffc LC |
90 | { |
91 | if (n >= 2) | |
92 | { | |
93 | r[0] = (unsigned char) (wc >> 8); | |
94 | r[1] = (unsigned char) wc; | |
95 | return 2; | |
96 | } | |
97 | else | |
98 | return RET_TOOSMALL; | |
99 | } | |
24d56127 | 100 | else if (wc < 0x110000) |
1cd4fffc LC |
101 | { |
102 | if (n >= 4) | |
103 | { | |
104 | ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10); | |
105 | ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff); | |
106 | r[0] = (unsigned char) (wc1 >> 8); | |
107 | r[1] = (unsigned char) wc1; | |
108 | r[2] = (unsigned char) (wc2 >> 8); | |
109 | r[3] = (unsigned char) wc2; | |
110 | return 4; | |
111 | } | |
112 | else | |
113 | return RET_TOOSMALL; | |
114 | } | |
24d56127 LC |
115 | } |
116 | return RET_ILUNI; | |
117 | } | |
118 | ||
119 | /* | |
120 | * UTF-16LE | |
121 | */ | |
122 | ||
123 | /* Specification: RFC 2781 */ | |
124 | ||
125 | static int | |
126 | utf16le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) | |
127 | { | |
128 | if (n >= 2) | |
129 | { | |
130 | ucs4_t wc = s[0] + (s[1] << 8); | |
131 | if (wc >= 0xd800 && wc < 0xdc00) | |
1cd4fffc LC |
132 | { |
133 | if (n >= 4) | |
134 | { | |
135 | ucs4_t wc2 = s[2] + (s[3] << 8); | |
136 | if (!(wc2 >= 0xdc00 && wc2 < 0xe000)) | |
137 | return RET_ILSEQ; | |
138 | *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00); | |
139 | return 4; | |
140 | } | |
141 | } | |
24d56127 | 142 | else if (wc >= 0xdc00 && wc < 0xe000) |
1cd4fffc LC |
143 | { |
144 | return RET_ILSEQ; | |
145 | } | |
24d56127 | 146 | else |
1cd4fffc LC |
147 | { |
148 | *pwc = wc; | |
149 | return 2; | |
150 | } | |
24d56127 LC |
151 | } |
152 | return RET_TOOFEW; | |
153 | } | |
154 | ||
155 | static int | |
156 | utf16le_wctomb (unsigned char *r, ucs4_t wc, size_t n) | |
157 | { | |
158 | if (!(wc >= 0xd800 && wc < 0xe000)) | |
159 | { | |
160 | if (wc < 0x10000) | |
1cd4fffc LC |
161 | { |
162 | if (n >= 2) | |
163 | { | |
164 | r[0] = (unsigned char) wc; | |
165 | r[1] = (unsigned char) (wc >> 8); | |
166 | return 2; | |
167 | } | |
168 | else | |
169 | return RET_TOOSMALL; | |
170 | } | |
24d56127 | 171 | else if (wc < 0x110000) |
1cd4fffc LC |
172 | { |
173 | if (n >= 4) | |
174 | { | |
175 | ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10); | |
176 | ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff); | |
177 | r[0] = (unsigned char) wc1; | |
178 | r[1] = (unsigned char) (wc1 >> 8); | |
179 | r[2] = (unsigned char) wc2; | |
180 | r[3] = (unsigned char) (wc2 >> 8); | |
181 | return 4; | |
182 | } | |
183 | else | |
184 | return RET_TOOSMALL; | |
185 | } | |
24d56127 LC |
186 | } |
187 | return RET_ILUNI; | |
188 | } | |
189 | ||
190 | /* | |
191 | * UTF-32BE | |
192 | */ | |
193 | ||
194 | /* Specification: Unicode 3.1 Standard Annex #19 */ | |
195 | ||
196 | static int | |
197 | utf32be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) | |
198 | { | |
199 | if (n >= 4) | |
200 | { | |
201 | ucs4_t wc = (s[0] << 24) + (s[1] << 16) + (s[2] << 8) + s[3]; | |
202 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) | |
1cd4fffc LC |
203 | { |
204 | *pwc = wc; | |
205 | return 4; | |
206 | } | |
24d56127 | 207 | else |
1cd4fffc | 208 | return RET_ILSEQ; |
24d56127 LC |
209 | } |
210 | return RET_TOOFEW; | |
211 | } | |
212 | ||
213 | static int | |
214 | utf32be_wctomb (unsigned char *r, ucs4_t wc, size_t n) | |
215 | { | |
216 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) | |
217 | { | |
218 | if (n >= 4) | |
1cd4fffc LC |
219 | { |
220 | r[0] = 0; | |
221 | r[1] = (unsigned char) (wc >> 16); | |
222 | r[2] = (unsigned char) (wc >> 8); | |
223 | r[3] = (unsigned char) wc; | |
224 | return 4; | |
225 | } | |
24d56127 | 226 | else |
1cd4fffc | 227 | return RET_TOOSMALL; |
24d56127 LC |
228 | } |
229 | return RET_ILUNI; | |
230 | } | |
231 | ||
232 | /* | |
233 | * UTF-32LE | |
234 | */ | |
235 | ||
236 | /* Specification: Unicode 3.1 Standard Annex #19 */ | |
237 | ||
238 | static int | |
239 | utf32le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) | |
240 | { | |
241 | if (n >= 4) | |
242 | { | |
243 | ucs4_t wc = s[0] + (s[1] << 8) + (s[2] << 16) + (s[3] << 24); | |
244 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) | |
1cd4fffc LC |
245 | { |
246 | *pwc = wc; | |
247 | return 4; | |
248 | } | |
24d56127 | 249 | else |
1cd4fffc | 250 | return RET_ILSEQ; |
24d56127 LC |
251 | } |
252 | return RET_TOOFEW; | |
253 | } | |
254 | ||
255 | static int | |
256 | utf32le_wctomb (unsigned char *r, ucs4_t wc, size_t n) | |
257 | { | |
258 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) | |
259 | { | |
260 | if (n >= 4) | |
1cd4fffc LC |
261 | { |
262 | r[0] = (unsigned char) wc; | |
263 | r[1] = (unsigned char) (wc >> 8); | |
264 | r[2] = (unsigned char) (wc >> 16); | |
265 | r[3] = 0; | |
266 | return 4; | |
24d56127 LC |
267 | } |
268 | else | |
1cd4fffc | 269 | return RET_TOOSMALL; |
24d56127 LC |
270 | } |
271 | return RET_ILUNI; | |
272 | } | |
273 | ||
274 | #endif | |
275 | ||
276 | size_t | |
277 | rpl_iconv (iconv_t cd, | |
1cd4fffc LC |
278 | ICONV_CONST char **inbuf, size_t *inbytesleft, |
279 | char **outbuf, size_t *outbytesleft) | |
24d56127 LC |
280 | #undef iconv |
281 | { | |
282 | #if REPLACE_ICONV_UTF | |
283 | switch ((uintptr_t) cd) | |
284 | { | |
285 | { | |
1cd4fffc LC |
286 | int (*xxx_wctomb) (unsigned char *, ucs4_t, size_t); |
287 | ||
288 | case (uintptr_t) _ICONV_UTF8_UTF16BE: | |
289 | xxx_wctomb = utf16be_wctomb; | |
290 | goto loop_from_utf8; | |
291 | case (uintptr_t) _ICONV_UTF8_UTF16LE: | |
292 | xxx_wctomb = utf16le_wctomb; | |
293 | goto loop_from_utf8; | |
294 | case (uintptr_t) _ICONV_UTF8_UTF32BE: | |
295 | xxx_wctomb = utf32be_wctomb; | |
296 | goto loop_from_utf8; | |
297 | case (uintptr_t) _ICONV_UTF8_UTF32LE: | |
298 | xxx_wctomb = utf32le_wctomb; | |
299 | goto loop_from_utf8; | |
24d56127 LC |
300 | |
301 | loop_from_utf8: | |
1cd4fffc LC |
302 | if (inbuf == NULL || *inbuf == NULL) |
303 | return 0; | |
304 | { | |
305 | ICONV_CONST char *inptr = *inbuf; | |
306 | size_t inleft = *inbytesleft; | |
307 | char *outptr = *outbuf; | |
308 | size_t outleft = *outbytesleft; | |
309 | size_t res = 0; | |
310 | while (inleft > 0) | |
311 | { | |
312 | ucs4_t uc; | |
313 | int m = u8_mbtoucr (&uc, (const uint8_t *) inptr, inleft); | |
314 | if (m <= 0) | |
315 | { | |
316 | if (m == -1) | |
317 | { | |
318 | errno = EILSEQ; | |
319 | res = (size_t)(-1); | |
320 | break; | |
321 | } | |
322 | if (m == -2) | |
323 | { | |
324 | errno = EINVAL; | |
325 | res = (size_t)(-1); | |
326 | break; | |
327 | } | |
328 | abort (); | |
329 | } | |
330 | else | |
331 | { | |
332 | int n = xxx_wctomb ((uint8_t *) outptr, uc, outleft); | |
333 | if (n < 0) | |
334 | { | |
335 | if (n == RET_ILUNI) | |
336 | { | |
337 | errno = EILSEQ; | |
338 | res = (size_t)(-1); | |
339 | break; | |
340 | } | |
341 | if (n == RET_TOOSMALL) | |
342 | { | |
343 | errno = E2BIG; | |
344 | res = (size_t)(-1); | |
345 | break; | |
346 | } | |
347 | abort (); | |
348 | } | |
349 | else | |
350 | { | |
351 | inptr += m; | |
352 | inleft -= m; | |
353 | outptr += n; | |
354 | outleft -= n; | |
355 | } | |
356 | } | |
357 | } | |
358 | *inbuf = inptr; | |
359 | *inbytesleft = inleft; | |
360 | *outbuf = outptr; | |
361 | *outbytesleft = outleft; | |
362 | return res; | |
363 | } | |
24d56127 LC |
364 | } |
365 | ||
366 | { | |
1cd4fffc LC |
367 | int (*xxx_mbtowc) (ucs4_t *, const unsigned char *, size_t); |
368 | ||
369 | case (uintptr_t) _ICONV_UTF16BE_UTF8: | |
370 | xxx_mbtowc = utf16be_mbtowc; | |
371 | goto loop_to_utf8; | |
372 | case (uintptr_t) _ICONV_UTF16LE_UTF8: | |
373 | xxx_mbtowc = utf16le_mbtowc; | |
374 | goto loop_to_utf8; | |
375 | case (uintptr_t) _ICONV_UTF32BE_UTF8: | |
376 | xxx_mbtowc = utf32be_mbtowc; | |
377 | goto loop_to_utf8; | |
378 | case (uintptr_t) _ICONV_UTF32LE_UTF8: | |
379 | xxx_mbtowc = utf32le_mbtowc; | |
380 | goto loop_to_utf8; | |
24d56127 LC |
381 | |
382 | loop_to_utf8: | |
1cd4fffc LC |
383 | if (inbuf == NULL || *inbuf == NULL) |
384 | return 0; | |
385 | { | |
386 | ICONV_CONST char *inptr = *inbuf; | |
387 | size_t inleft = *inbytesleft; | |
388 | char *outptr = *outbuf; | |
389 | size_t outleft = *outbytesleft; | |
390 | size_t res = 0; | |
391 | while (inleft > 0) | |
392 | { | |
393 | ucs4_t uc; | |
394 | int m = xxx_mbtowc (&uc, (const uint8_t *) inptr, inleft); | |
395 | if (m <= 0) | |
396 | { | |
397 | if (m == RET_ILSEQ) | |
398 | { | |
399 | errno = EILSEQ; | |
400 | res = (size_t)(-1); | |
401 | break; | |
402 | } | |
403 | if (m == RET_TOOFEW) | |
404 | { | |
405 | errno = EINVAL; | |
406 | res = (size_t)(-1); | |
407 | break; | |
408 | } | |
409 | abort (); | |
410 | } | |
411 | else | |
412 | { | |
413 | int n = u8_uctomb ((uint8_t *) outptr, uc, outleft); | |
414 | if (n < 0) | |
415 | { | |
416 | if (n == -1) | |
417 | { | |
418 | errno = EILSEQ; | |
419 | res = (size_t)(-1); | |
420 | break; | |
421 | } | |
422 | if (n == -2) | |
423 | { | |
424 | errno = E2BIG; | |
425 | res = (size_t)(-1); | |
426 | break; | |
427 | } | |
428 | abort (); | |
429 | } | |
430 | else | |
431 | { | |
432 | inptr += m; | |
433 | inleft -= m; | |
434 | outptr += n; | |
435 | outleft -= n; | |
436 | } | |
437 | } | |
438 | } | |
439 | *inbuf = inptr; | |
440 | *inbytesleft = inleft; | |
441 | *outbuf = outptr; | |
442 | *outbytesleft = outleft; | |
443 | return res; | |
444 | } | |
24d56127 LC |
445 | } |
446 | } | |
447 | #endif | |
448 | return iconv (cd, inbuf, inbytesleft, outbuf, outbytesleft); | |
449 | } |