Line data Source code
1 : /*
2 : * Copyright (c) 2004, 2006, 2007, 2008 Kungliga Tekniska Högskolan
3 : * (Royal Institute of Technology, Stockholm, Sweden).
4 : * All rights reserved.
5 : *
6 : * Redistribution and use in source and binary forms, with or without
7 : * modification, are permitted provided that the following conditions
8 : * are met:
9 : *
10 : * 1. Redistributions of source code must retain the above copyright
11 : * notice, this list of conditions and the following disclaimer.
12 : *
13 : * 2. Redistributions in binary form must reproduce the above copyright
14 : * notice, this list of conditions and the following disclaimer in the
15 : * documentation and/or other materials provided with the distribution.
16 : *
17 : * 3. Neither the name of the Institute nor the names of its contributors
18 : * may be used to endorse or promote products derived from this software
19 : * without specific prior written permission.
20 : *
21 : * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 : * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 : * SUCH DAMAGE.
32 : */
33 :
34 : #include <config.h>
35 : #include "windlocl.h"
36 :
37 : static int
38 3120792 : utf8toutf32(const unsigned char **pp, uint32_t *out)
39 : {
40 3120792 : const unsigned char *p = *pp;
41 3120792 : unsigned c = *p;
42 :
43 3120792 : if (c & 0x80) {
44 928254 : if ((c & 0xE0) == 0xC0) {
45 28686 : const unsigned c2 = *++p;
46 28686 : if ((c2 & 0xC0) == 0x80) {
47 57372 : *out = ((c & 0x1F) << 6)
48 28686 : | (c2 & 0x3F);
49 : } else {
50 0 : return WIND_ERR_INVALID_UTF8;
51 : }
52 899568 : } else if ((c & 0xF0) == 0xE0) {
53 899568 : const unsigned c2 = *++p;
54 899568 : if ((c2 & 0xC0) == 0x80) {
55 899568 : const unsigned c3 = *++p;
56 899568 : if ((c3 & 0xC0) == 0x80) {
57 1799136 : *out = ((c & 0x0F) << 12)
58 899568 : | ((c2 & 0x3F) << 6)
59 899568 : | (c3 & 0x3F);
60 : } else {
61 0 : return WIND_ERR_INVALID_UTF8;
62 : }
63 : } else {
64 0 : return WIND_ERR_INVALID_UTF8;
65 : }
66 0 : } else if ((c & 0xF8) == 0xF0) {
67 0 : const unsigned c2 = *++p;
68 0 : if ((c2 & 0xC0) == 0x80) {
69 0 : const unsigned c3 = *++p;
70 0 : if ((c3 & 0xC0) == 0x80) {
71 0 : const unsigned c4 = *++p;
72 0 : if ((c4 & 0xC0) == 0x80) {
73 0 : *out = ((c & 0x07) << 18)
74 0 : | ((c2 & 0x3F) << 12)
75 0 : | ((c3 & 0x3F) << 6)
76 0 : | (c4 & 0x3F);
77 : } else {
78 0 : return WIND_ERR_INVALID_UTF8;
79 : }
80 : } else {
81 0 : return WIND_ERR_INVALID_UTF8;
82 : }
83 : } else {
84 0 : return WIND_ERR_INVALID_UTF8;
85 : }
86 : } else {
87 0 : return WIND_ERR_INVALID_UTF8;
88 : }
89 : } else {
90 2192538 : *out = c;
91 : }
92 :
93 3120792 : *pp = p;
94 :
95 3120792 : return 0;
96 : }
97 :
98 : /**
99 : * Convert an UTF-8 string to an UCS4 string.
100 : *
101 : * @param in an UTF-8 string to convert.
102 : * @param out the resulting UCS4 strint, must be at least
103 : * wind_utf8ucs4_length() long. If out is NULL, the function will
104 : * calculate the needed space for the out variable (just like
105 : * wind_utf8ucs4_length()).
106 : * @param out_len before processing out_len should be the length of
107 : * the out variable, after processing it will be the length of the out
108 : * string.
109 : *
110 : * @return returns 0 on success, an wind error code otherwise
111 : * @ingroup wind
112 : */
113 :
114 : int
115 3600 : wind_utf8ucs4(const char *in, uint32_t *out, size_t *out_len)
116 : {
117 : const unsigned char *p;
118 3600 : size_t o = 0;
119 : int ret;
120 :
121 115200 : for (p = (const unsigned char *)in; *p != '\0'; ++p) {
122 : uint32_t u;
123 :
124 54000 : ret = utf8toutf32(&p, &u);
125 54000 : if (ret)
126 0 : return ret;
127 :
128 54000 : if (out) {
129 27000 : if (o >= *out_len)
130 0 : return WIND_ERR_OVERRUN;
131 27000 : out[o] = u;
132 : }
133 54000 : o++;
134 : }
135 3600 : *out_len = o;
136 3600 : return 0;
137 : }
138 :
139 : /**
140 : * Calculate the length of from converting a UTF-8 string to a UCS4
141 : * string.
142 : *
143 : * @param in an UTF-8 string to convert.
144 : * @param out_len the length of the resulting UCS4 string.
145 : *
146 : * @return returns 0 on success, an wind error code otherwise
147 : * @ingroup wind
148 : */
149 :
150 : int
151 1800 : wind_utf8ucs4_length(const char *in, size_t *out_len)
152 : {
153 1800 : return wind_utf8ucs4(in, NULL, out_len);
154 : }
155 :
156 : static const char first_char[4] =
157 : { 0x00, 0xC0, 0xE0, 0xF0 };
158 :
159 : /**
160 : * Convert an UCS4 string to a UTF-8 string.
161 : *
162 : * @param in an UCS4 string to convert.
163 : * @param in_len the length input array.
164 :
165 : * @param out the resulting UTF-8 strint, must be at least
166 : * wind_ucs4utf8_length() + 1 long (the extra char for the NUL). If
167 : * out is NULL, the function will calculate the needed space for the
168 : * out variable (just like wind_ucs4utf8_length()).
169 :
170 : * @param out_len before processing out_len should be the length of
171 : * the out variable, after processing it will be the length of the out
172 : * string.
173 : *
174 : * @return returns 0 on success, an wind error code otherwise
175 : * @ingroup wind
176 : */
177 :
178 : int
179 0 : wind_ucs4utf8(const uint32_t *in, size_t in_len, char *out, size_t *out_len)
180 : {
181 : uint32_t ch;
182 : size_t i, len, o;
183 :
184 0 : for (o = 0, i = 0; i < in_len; i++) {
185 0 : ch = in[i];
186 :
187 0 : if (ch < 0x80) {
188 0 : len = 1;
189 0 : } else if (ch < 0x800) {
190 0 : len = 2;
191 0 : } else if (ch < 0x10000) {
192 0 : len = 3;
193 0 : } else if (ch <= 0x10FFFF) {
194 0 : len = 4;
195 : } else
196 0 : return WIND_ERR_INVALID_UTF32;
197 :
198 0 : o += len;
199 :
200 0 : if (out) {
201 0 : if (o >= *out_len)
202 0 : return WIND_ERR_OVERRUN;
203 :
204 0 : switch(len) {
205 0 : case 4:
206 0 : out[3] = (ch | 0x80) & 0xbf;
207 0 : ch = ch >> 6;
208 0 : case 3:
209 0 : out[2] = (ch | 0x80) & 0xbf;
210 0 : ch = ch >> 6;
211 0 : case 2:
212 0 : out[1] = (ch | 0x80) & 0xbf;
213 0 : ch = ch >> 6;
214 0 : case 1:
215 0 : out[0] = ch | first_char[len - 1];
216 : }
217 : }
218 0 : out += len;
219 : }
220 0 : if (out) {
221 0 : if (o + 1 >= *out_len)
222 0 : return WIND_ERR_OVERRUN;
223 0 : *out = '\0';
224 : }
225 0 : *out_len = o;
226 0 : return 0;
227 : }
228 :
229 : /**
230 : * Calculate the length of from converting a UCS4 string to an UTF-8 string.
231 : *
232 : * @param in an UCS4 string to convert.
233 : * @param in_len the length of UCS4 string to convert.
234 : * @param out_len the length of the resulting UTF-8 string.
235 : *
236 : * @return returns 0 on success, an wind error code otherwise
237 : * @ingroup wind
238 : */
239 :
240 : int
241 0 : wind_ucs4utf8_length(const uint32_t *in, size_t in_len, size_t *out_len)
242 : {
243 0 : return wind_ucs4utf8(in, in_len, NULL, out_len);
244 : }
245 :
246 : /**
247 : * Read in an UCS2 from a buffer.
248 : *
249 : * @param ptr The input buffer to read from.
250 : * @param len the length of the input buffer.
251 : * @param flags Flags to control the behavior of the function.
252 : * @param out the output UCS2, the array must be at least out/2 long.
253 : * @param out_len the output length
254 : *
255 : * @return returns 0 on success, an wind error code otherwise.
256 : * @ingroup wind
257 : */
258 :
259 : int
260 86081 : wind_ucs2read(const void *ptr, size_t len, unsigned int *flags,
261 : uint16_t *out, size_t *out_len)
262 : {
263 86081 : const unsigned char *p = ptr;
264 86081 : int little = ((*flags) & WIND_RW_LE);
265 86081 : size_t olen = *out_len;
266 :
267 : /** if len is zero, flags are unchanged */
268 86081 : if (len == 0) {
269 0 : *out_len = 0;
270 0 : return 0;
271 : }
272 :
273 : /** if len is odd, WIND_ERR_LENGTH_NOT_MOD2 is returned */
274 86081 : if (len & 1)
275 0 : return WIND_ERR_LENGTH_NOT_MOD2;
276 :
277 : /**
278 : * If the flags WIND_RW_BOM is set, check for BOM. If not BOM is
279 : * found, check is LE/BE flag is already and use that otherwise
280 : * fail with WIND_ERR_NO_BOM. When done, clear WIND_RW_BOM and
281 : * the LE/BE flag and set the resulting LE/BE flag.
282 : */
283 86081 : if ((*flags) & WIND_RW_BOM) {
284 0 : uint16_t bom = (p[0] << 8) + p[1];
285 0 : if (bom == 0xfffe || bom == 0xfeff) {
286 0 : little = (bom == 0xfffe);
287 0 : p += 2;
288 0 : len -= 2;
289 0 : } else if (((*flags) & (WIND_RW_LE|WIND_RW_BE)) != 0) {
290 : /* little already set */
291 : } else
292 0 : return WIND_ERR_NO_BOM;
293 0 : *flags = ((*flags) & ~(WIND_RW_BOM|WIND_RW_LE|WIND_RW_BE));
294 0 : *flags |= little ? WIND_RW_LE : WIND_RW_BE;
295 : }
296 :
297 1277760 : while (len) {
298 1107425 : if (olen < 1)
299 0 : return WIND_ERR_OVERRUN;
300 1107425 : if (little)
301 1107425 : *out = (p[1] << 8) + p[0];
302 : else
303 0 : *out = (p[0] << 8) + p[1];
304 1107425 : out++; p += 2; len -= 2; olen--;
305 : }
306 86081 : *out_len -= olen;
307 86081 : return 0;
308 : }
309 :
310 : /**
311 : * Write an UCS2 string to a buffer.
312 : *
313 : * @param in The input UCS2 string.
314 : * @param in_len the length of the input buffer.
315 : * @param flags Flags to control the behavior of the function.
316 : * @param ptr The input buffer to write to, the array must be at least
317 : * (in + 1) * 2 bytes long.
318 : * @param out_len the output length
319 : *
320 : * @return returns 0 on success, an wind error code otherwise.
321 : * @ingroup wind
322 : */
323 :
324 : int
325 66861 : wind_ucs2write(const uint16_t *in, size_t in_len, unsigned int *flags,
326 : void *ptr, size_t *out_len)
327 : {
328 66861 : unsigned char *p = ptr;
329 66861 : size_t len = *out_len;
330 :
331 : /** If in buffer is not of length be mod 2, WIND_ERR_LENGTH_NOT_MOD2 is returned*/
332 66861 : if (len & 1)
333 0 : return WIND_ERR_LENGTH_NOT_MOD2;
334 :
335 : /** On zero input length, flags are preserved */
336 66861 : if (in_len == 0) {
337 0 : *out_len = 0;
338 0 : return 0;
339 : }
340 : /** If flags have WIND_RW_BOM set, the byte order mark is written
341 : * first to the output data */
342 66861 : if ((*flags) & WIND_RW_BOM) {
343 0 : uint16_t bom = 0xfffe;
344 :
345 0 : if (len < 2)
346 0 : return WIND_ERR_OVERRUN;
347 :
348 0 : if ((*flags) & WIND_RW_LE) {
349 0 : p[0] = (bom ) & 0xff;
350 0 : p[1] = (bom >> 8) & 0xff;
351 : } else {
352 0 : p[1] = (bom ) & 0xff;
353 0 : p[0] = (bom >> 8) & 0xff;
354 : }
355 0 : len -= 2;
356 : }
357 :
358 1001735 : while (in_len) {
359 : /** If the output wont fit into out_len, WIND_ERR_OVERRUN is returned */
360 869692 : if (len < 2)
361 0 : return WIND_ERR_OVERRUN;
362 869692 : if ((*flags) & WIND_RW_LE) {
363 869692 : p[0] = (in[0] ) & 0xff;
364 869692 : p[1] = (in[0] >> 8) & 0xff;
365 : } else {
366 0 : p[1] = (in[0] ) & 0xff;
367 0 : p[0] = (in[0] >> 8) & 0xff;
368 : }
369 869692 : len -= 2;
370 869692 : in_len--;
371 869692 : p += 2;
372 869692 : in++;
373 : }
374 66861 : *out_len -= len;
375 66861 : return 0;
376 : }
377 :
378 :
379 : /**
380 : * Convert an UTF-8 string to an UCS2 string.
381 : *
382 : * @param in an UTF-8 string to convert.
383 : * @param out the resulting UCS2 strint, must be at least
384 : * wind_utf8ucs2_length() long. If out is NULL, the function will
385 : * calculate the needed space for the out variable (just like
386 : * wind_utf8ucs2_length()).
387 : * @param out_len before processing out_len should be the length of
388 : * the out variable, after processing it will be the length of the out
389 : * string.
390 : *
391 : * @return returns 0 on success, an wind error code otherwise
392 : * @ingroup wind
393 : */
394 :
395 : int
396 153052 : wind_utf8ucs2(const char *in, uint16_t *out, size_t *out_len)
397 : {
398 : const unsigned char *p;
399 153052 : size_t o = 0;
400 : int ret;
401 :
402 6439688 : for (p = (const unsigned char *)in; *p != '\0'; ++p) {
403 : uint32_t u;
404 :
405 3066792 : ret = utf8toutf32(&p, &u);
406 3066792 : if (ret)
407 0 : return ret;
408 :
409 3066792 : if (u & 0xffff0000)
410 0 : return WIND_ERR_NOT_UTF16;
411 :
412 3066792 : if (out) {
413 1533396 : if (o >= *out_len)
414 0 : return WIND_ERR_OVERRUN;
415 1533396 : out[o] = u;
416 : }
417 3066792 : o++;
418 : }
419 153052 : *out_len = o;
420 153052 : return 0;
421 : }
422 :
423 : /**
424 : * Calculate the length of from converting a UTF-8 string to a UCS2
425 : * string.
426 : *
427 : * @param in an UTF-8 string to convert.
428 : * @param out_len the length of the resulting UCS4 string.
429 : *
430 : * @return returns 0 on success, an wind error code otherwise
431 : * @ingroup wind
432 : */
433 :
434 : int
435 76526 : wind_utf8ucs2_length(const char *in, size_t *out_len)
436 : {
437 76526 : return wind_utf8ucs2(in, NULL, out_len);
438 : }
439 :
440 : /**
441 : * Convert an UCS2 string to a UTF-8 string.
442 : *
443 : * @param in an UCS2 string to convert.
444 : * @param in_len the length of the in UCS2 string.
445 : * @param out the resulting UTF-8 strint, must be at least
446 : * wind_ucs2utf8_length() long. If out is NULL, the function will
447 : * calculate the needed space for the out variable (just like
448 : * wind_ucs2utf8_length()).
449 : * @param out_len before processing out_len should be the length of
450 : * the out variable, after processing it will be the length of the out
451 : * string.
452 : *
453 : * @return returns 0 on success, an wind error code otherwise
454 : * @ingroup wind
455 : */
456 :
457 : int
458 172162 : wind_ucs2utf8(const uint16_t *in, size_t in_len, char *out, size_t *out_len)
459 : {
460 : uint16_t ch;
461 : size_t i, len, o;
462 :
463 2387012 : for (o = 0, i = 0; i < in_len; i++) {
464 2214850 : ch = in[i];
465 :
466 2214850 : if (ch < 0x80) {
467 2170140 : len = 1;
468 0 : } else if (ch < 0x800) {
469 0 : len = 2;
470 : } else
471 0 : len = 3;
472 :
473 2214850 : o += len;
474 :
475 2214850 : if (out) {
476 1107425 : if (o >= *out_len)
477 0 : return WIND_ERR_OVERRUN;
478 :
479 1107425 : switch(len) {
480 0 : case 3:
481 0 : out[2] = (ch | 0x80) & 0xbf;
482 0 : ch = ch >> 6;
483 0 : case 2:
484 0 : out[1] = (ch | 0x80) & 0xbf;
485 0 : ch = ch >> 6;
486 1107425 : case 1:
487 1107425 : out[0] = ch | first_char[len - 1];
488 : }
489 1107425 : out += len;
490 : }
491 : }
492 172162 : if (out) {
493 86081 : if (o >= *out_len)
494 0 : return WIND_ERR_OVERRUN;
495 86081 : *out = '\0';
496 : }
497 172162 : *out_len = o;
498 172162 : return 0;
499 : }
500 :
501 : /**
502 : * Calculate the length of from converting a UCS2 string to an UTF-8 string.
503 : *
504 : * @param in an UCS2 string to convert.
505 : * @param in_len an UCS2 string length to convert.
506 : * @param out_len the length of the resulting UTF-8 string.
507 : *
508 : * @return returns 0 on success, an wind error code otherwise
509 : * @ingroup wind
510 : */
511 :
512 : int
513 86081 : wind_ucs2utf8_length(const uint16_t *in, size_t in_len, size_t *out_len)
514 : {
515 86081 : return wind_ucs2utf8(in, in_len, NULL, out_len);
516 : }
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