Commit | Line | Data |
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24d56127 LC |
1 | /* Character set conversion. |
2 | Copyright (C) 1999-2001, 2007 Free Software Foundation, Inc. | |
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 | |
15 | with this program; if not, write to the Free Software Foundation, | |
16 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ | |
17 | ||
18 | #include <config.h> | |
19 | ||
20 | /* Specification. */ | |
21 | #include <iconv.h> | |
22 | ||
23 | #include <stddef.h> | |
24 | ||
25 | #if REPLACE_ICONV_UTF | |
26 | # include <errno.h> | |
27 | # include <stdint.h> | |
28 | # include <stdlib.h> | |
29 | # include "unistr.h" | |
30 | # ifndef uintptr_t | |
31 | # define uintptr_t unsigned long | |
32 | # endif | |
33 | #endif | |
34 | ||
35 | #if REPLACE_ICONV_UTF | |
36 | ||
37 | /* UTF-{16,32}{BE,LE} converters taken from GNU libiconv 1.11. */ | |
38 | ||
39 | /* Return code if invalid. (xxx_mbtowc) */ | |
40 | # define RET_ILSEQ -1 | |
41 | /* Return code if no bytes were read. (xxx_mbtowc) */ | |
42 | # define RET_TOOFEW -2 | |
43 | ||
44 | /* Return code if invalid. (xxx_wctomb) */ | |
45 | # define RET_ILUNI -1 | |
46 | /* Return code if output buffer is too small. (xxx_wctomb, xxx_reset) */ | |
47 | # define RET_TOOSMALL -2 | |
48 | ||
49 | /* | |
50 | * UTF-16BE | |
51 | */ | |
52 | ||
53 | /* Specification: RFC 2781 */ | |
54 | ||
55 | static int | |
56 | utf16be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) | |
57 | { | |
58 | if (n >= 2) | |
59 | { | |
60 | ucs4_t wc = (s[0] << 8) + s[1]; | |
61 | if (wc >= 0xd800 && wc < 0xdc00) | |
62 | { | |
63 | if (n >= 4) | |
64 | { | |
65 | ucs4_t wc2 = (s[2] << 8) + s[3]; | |
66 | if (!(wc2 >= 0xdc00 && wc2 < 0xe000)) | |
67 | return RET_ILSEQ; | |
68 | *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00); | |
69 | return 4; | |
70 | } | |
71 | } | |
72 | else if (wc >= 0xdc00 && wc < 0xe000) | |
73 | { | |
74 | return RET_ILSEQ; | |
75 | } | |
76 | else | |
77 | { | |
78 | *pwc = wc; | |
79 | return 2; | |
80 | } | |
81 | } | |
82 | return RET_TOOFEW; | |
83 | } | |
84 | ||
85 | static int | |
86 | utf16be_wctomb (unsigned char *r, ucs4_t wc, size_t n) | |
87 | { | |
88 | if (!(wc >= 0xd800 && wc < 0xe000)) | |
89 | { | |
90 | if (wc < 0x10000) | |
91 | { | |
92 | if (n >= 2) | |
93 | { | |
94 | r[0] = (unsigned char) (wc >> 8); | |
95 | r[1] = (unsigned char) wc; | |
96 | return 2; | |
97 | } | |
98 | else | |
99 | return RET_TOOSMALL; | |
100 | } | |
101 | else if (wc < 0x110000) | |
102 | { | |
103 | if (n >= 4) | |
104 | { | |
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; | |
111 | return 4; | |
112 | } | |
113 | else | |
114 | return RET_TOOSMALL; | |
115 | } | |
116 | } | |
117 | return RET_ILUNI; | |
118 | } | |
119 | ||
120 | /* | |
121 | * UTF-16LE | |
122 | */ | |
123 | ||
124 | /* Specification: RFC 2781 */ | |
125 | ||
126 | static int | |
127 | utf16le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) | |
128 | { | |
129 | if (n >= 2) | |
130 | { | |
131 | ucs4_t wc = s[0] + (s[1] << 8); | |
132 | if (wc >= 0xd800 && wc < 0xdc00) | |
133 | { | |
134 | if (n >= 4) | |
135 | { | |
136 | ucs4_t wc2 = s[2] + (s[3] << 8); | |
137 | if (!(wc2 >= 0xdc00 && wc2 < 0xe000)) | |
138 | return RET_ILSEQ; | |
139 | *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00); | |
140 | return 4; | |
141 | } | |
142 | } | |
143 | else if (wc >= 0xdc00 && wc < 0xe000) | |
144 | { | |
145 | return RET_ILSEQ; | |
146 | } | |
147 | else | |
148 | { | |
149 | *pwc = wc; | |
150 | return 2; | |
151 | } | |
152 | } | |
153 | return RET_TOOFEW; | |
154 | } | |
155 | ||
156 | static int | |
157 | utf16le_wctomb (unsigned char *r, ucs4_t wc, size_t n) | |
158 | { | |
159 | if (!(wc >= 0xd800 && wc < 0xe000)) | |
160 | { | |
161 | if (wc < 0x10000) | |
162 | { | |
163 | if (n >= 2) | |
164 | { | |
165 | r[0] = (unsigned char) wc; | |
166 | r[1] = (unsigned char) (wc >> 8); | |
167 | return 2; | |
168 | } | |
169 | else | |
170 | return RET_TOOSMALL; | |
171 | } | |
172 | else if (wc < 0x110000) | |
173 | { | |
174 | if (n >= 4) | |
175 | { | |
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); | |
182 | return 4; | |
183 | } | |
184 | else | |
185 | return RET_TOOSMALL; | |
186 | } | |
187 | } | |
188 | return RET_ILUNI; | |
189 | } | |
190 | ||
191 | /* | |
192 | * UTF-32BE | |
193 | */ | |
194 | ||
195 | /* Specification: Unicode 3.1 Standard Annex #19 */ | |
196 | ||
197 | static int | |
198 | utf32be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) | |
199 | { | |
200 | if (n >= 4) | |
201 | { | |
202 | ucs4_t wc = (s[0] << 24) + (s[1] << 16) + (s[2] << 8) + s[3]; | |
203 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) | |
204 | { | |
205 | *pwc = wc; | |
206 | return 4; | |
207 | } | |
208 | else | |
209 | return RET_ILSEQ; | |
210 | } | |
211 | return RET_TOOFEW; | |
212 | } | |
213 | ||
214 | static int | |
215 | utf32be_wctomb (unsigned char *r, ucs4_t wc, size_t n) | |
216 | { | |
217 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) | |
218 | { | |
219 | if (n >= 4) | |
220 | { | |
221 | r[0] = 0; | |
222 | r[1] = (unsigned char) (wc >> 16); | |
223 | r[2] = (unsigned char) (wc >> 8); | |
224 | r[3] = (unsigned char) wc; | |
225 | return 4; | |
226 | } | |
227 | else | |
228 | return RET_TOOSMALL; | |
229 | } | |
230 | return RET_ILUNI; | |
231 | } | |
232 | ||
233 | /* | |
234 | * UTF-32LE | |
235 | */ | |
236 | ||
237 | /* Specification: Unicode 3.1 Standard Annex #19 */ | |
238 | ||
239 | static int | |
240 | utf32le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n) | |
241 | { | |
242 | if (n >= 4) | |
243 | { | |
244 | ucs4_t wc = s[0] + (s[1] << 8) + (s[2] << 16) + (s[3] << 24); | |
245 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) | |
246 | { | |
247 | *pwc = wc; | |
248 | return 4; | |
249 | } | |
250 | else | |
251 | return RET_ILSEQ; | |
252 | } | |
253 | return RET_TOOFEW; | |
254 | } | |
255 | ||
256 | static int | |
257 | utf32le_wctomb (unsigned char *r, ucs4_t wc, size_t n) | |
258 | { | |
259 | if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) | |
260 | { | |
261 | if (n >= 4) | |
262 | { | |
263 | r[0] = (unsigned char) wc; | |
264 | r[1] = (unsigned char) (wc >> 8); | |
265 | r[2] = (unsigned char) (wc >> 16); | |
266 | r[3] = 0; | |
267 | return 4; | |
268 | } | |
269 | else | |
270 | return RET_TOOSMALL; | |
271 | } | |
272 | return RET_ILUNI; | |
273 | } | |
274 | ||
275 | #endif | |
276 | ||
277 | size_t | |
278 | rpl_iconv (iconv_t cd, | |
279 | ICONV_CONST char **inbuf, size_t *inbytesleft, | |
280 | char **outbuf, size_t *outbytesleft) | |
281 | #undef iconv | |
282 | { | |
283 | #if REPLACE_ICONV_UTF | |
284 | switch ((uintptr_t) cd) | |
285 | { | |
286 | { | |
287 | int (*xxx_wctomb) (unsigned char *, ucs4_t, size_t); | |
288 | ||
289 | case (uintptr_t) _ICONV_UTF8_UTF16BE: | |
290 | xxx_wctomb = utf16be_wctomb; | |
291 | goto loop_from_utf8; | |
292 | case (uintptr_t) _ICONV_UTF8_UTF16LE: | |
293 | xxx_wctomb = utf16le_wctomb; | |
294 | goto loop_from_utf8; | |
295 | case (uintptr_t) _ICONV_UTF8_UTF32BE: | |
296 | xxx_wctomb = utf32be_wctomb; | |
297 | goto loop_from_utf8; | |
298 | case (uintptr_t) _ICONV_UTF8_UTF32LE: | |
299 | xxx_wctomb = utf32le_wctomb; | |
300 | goto loop_from_utf8; | |
301 | ||
302 | loop_from_utf8: | |
303 | if (inbuf == NULL || *inbuf == NULL) | |
304 | return 0; | |
305 | { | |
306 | ICONV_CONST char *inptr = *inbuf; | |
307 | size_t inleft = *inbytesleft; | |
308 | char *outptr = *outbuf; | |
309 | size_t outleft = *outbytesleft; | |
310 | size_t res = 0; | |
311 | while (inleft > 0) | |
312 | { | |
313 | ucs4_t uc; | |
314 | int m = u8_mbtoucr (&uc, (const uint8_t *) inptr, inleft); | |
315 | if (m <= 0) | |
316 | { | |
317 | if (m == -1) | |
318 | { | |
319 | errno = EILSEQ; | |
320 | res = (size_t)(-1); | |
321 | break; | |
322 | } | |
323 | if (m == -2) | |
324 | { | |
325 | errno = EINVAL; | |
326 | res = (size_t)(-1); | |
327 | break; | |
328 | } | |
329 | abort (); | |
330 | } | |
331 | else | |
332 | { | |
333 | int n = xxx_wctomb ((uint8_t *) outptr, uc, outleft); | |
334 | if (n < 0) | |
335 | { | |
336 | if (n == RET_ILUNI) | |
337 | { | |
338 | errno = EILSEQ; | |
339 | res = (size_t)(-1); | |
340 | break; | |
341 | } | |
342 | if (n == RET_TOOSMALL) | |
343 | { | |
344 | errno = E2BIG; | |
345 | res = (size_t)(-1); | |
346 | break; | |
347 | } | |
348 | abort (); | |
349 | } | |
350 | else | |
351 | { | |
352 | inptr += m; | |
353 | inleft -= m; | |
354 | outptr += n; | |
355 | outleft -= n; | |
356 | } | |
357 | } | |
358 | } | |
359 | *inbuf = inptr; | |
360 | *inbytesleft = inleft; | |
361 | *outbuf = outptr; | |
362 | *outbytesleft = outleft; | |
363 | return res; | |
364 | } | |
365 | } | |
366 | ||
367 | { | |
368 | int (*xxx_mbtowc) (ucs4_t *, const unsigned char *, size_t); | |
369 | ||
370 | case (uintptr_t) _ICONV_UTF16BE_UTF8: | |
371 | xxx_mbtowc = utf16be_mbtowc; | |
372 | goto loop_to_utf8; | |
373 | case (uintptr_t) _ICONV_UTF16LE_UTF8: | |
374 | xxx_mbtowc = utf16le_mbtowc; | |
375 | goto loop_to_utf8; | |
376 | case (uintptr_t) _ICONV_UTF32BE_UTF8: | |
377 | xxx_mbtowc = utf32be_mbtowc; | |
378 | goto loop_to_utf8; | |
379 | case (uintptr_t) _ICONV_UTF32LE_UTF8: | |
380 | xxx_mbtowc = utf32le_mbtowc; | |
381 | goto loop_to_utf8; | |
382 | ||
383 | loop_to_utf8: | |
384 | if (inbuf == NULL || *inbuf == NULL) | |
385 | return 0; | |
386 | { | |
387 | ICONV_CONST char *inptr = *inbuf; | |
388 | size_t inleft = *inbytesleft; | |
389 | char *outptr = *outbuf; | |
390 | size_t outleft = *outbytesleft; | |
391 | size_t res = 0; | |
392 | while (inleft > 0) | |
393 | { | |
394 | ucs4_t uc; | |
395 | int m = xxx_mbtowc (&uc, (const uint8_t *) inptr, inleft); | |
396 | if (m <= 0) | |
397 | { | |
398 | if (m == RET_ILSEQ) | |
399 | { | |
400 | errno = EILSEQ; | |
401 | res = (size_t)(-1); | |
402 | break; | |
403 | } | |
404 | if (m == RET_TOOFEW) | |
405 | { | |
406 | errno = EINVAL; | |
407 | res = (size_t)(-1); | |
408 | break; | |
409 | } | |
410 | abort (); | |
411 | } | |
412 | else | |
413 | { | |
414 | int n = u8_uctomb ((uint8_t *) outptr, uc, outleft); | |
415 | if (n < 0) | |
416 | { | |
417 | if (n == -1) | |
418 | { | |
419 | errno = EILSEQ; | |
420 | res = (size_t)(-1); | |
421 | break; | |
422 | } | |
423 | if (n == -2) | |
424 | { | |
425 | errno = E2BIG; | |
426 | res = (size_t)(-1); | |
427 | break; | |
428 | } | |
429 | abort (); | |
430 | } | |
431 | else | |
432 | { | |
433 | inptr += m; | |
434 | inleft -= m; | |
435 | outptr += n; | |
436 | outleft -= n; | |
437 | } | |
438 | } | |
439 | } | |
440 | *inbuf = inptr; | |
441 | *inbytesleft = inleft; | |
442 | *outbuf = outptr; | |
443 | *outbytesleft = outleft; | |
444 | return res; | |
445 | } | |
446 | } | |
447 | } | |
448 | #endif | |
449 | return iconv (cd, inbuf, inbytesleft, outbuf, outbytesleft); | |
450 | } |