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1 | /* | |
2 | * Transcoding support for CUPS. | |
3 | * | |
4 | * Copyright 2007-2014 by Apple Inc. | |
5 | * Copyright 1997-2007 by Easy Software Products. | |
6 | * | |
7 | * Licensed under Apache License v2.0. See the file "LICENSE" for more information. | |
8 | */ | |
9 | ||
10 | /* | |
11 | * Include necessary headers... | |
12 | */ | |
13 | ||
14 | #include "cups-private.h" | |
15 | #include "debug-internal.h" | |
16 | #include <limits.h> | |
17 | #include <time.h> | |
18 | #ifdef HAVE_ICONV_H | |
19 | # include <iconv.h> | |
20 | #endif /* HAVE_ICONV_H */ | |
21 | ||
22 | ||
23 | /* | |
24 | * Local globals... | |
25 | */ | |
26 | ||
27 | #ifdef HAVE_ICONV_H | |
28 | static _cups_mutex_t map_mutex = _CUPS_MUTEX_INITIALIZER; | |
29 | /* Mutex to control access to maps */ | |
30 | static iconv_t map_from_utf8 = (iconv_t)-1; | |
31 | /* Convert from UTF-8 to charset */ | |
32 | static iconv_t map_to_utf8 = (iconv_t)-1; | |
33 | /* Convert from charset to UTF-8 */ | |
34 | static cups_encoding_t map_encoding = CUPS_AUTO_ENCODING; | |
35 | /* Which charset is cached */ | |
36 | #endif /* HAVE_ICONV_H */ | |
37 | ||
38 | ||
39 | /* | |
40 | * '_cupsCharmapFlush()' - Flush all character set maps out of cache. | |
41 | */ | |
42 | ||
43 | void | |
44 | _cupsCharmapFlush(void) | |
45 | { | |
46 | #ifdef HAVE_ICONV_H | |
47 | if (map_from_utf8 != (iconv_t)-1) | |
48 | { | |
49 | iconv_close(map_from_utf8); | |
50 | map_from_utf8 = (iconv_t)-1; | |
51 | } | |
52 | ||
53 | if (map_to_utf8 != (iconv_t)-1) | |
54 | { | |
55 | iconv_close(map_to_utf8); | |
56 | map_to_utf8 = (iconv_t)-1; | |
57 | } | |
58 | ||
59 | map_encoding = CUPS_AUTO_ENCODING; | |
60 | #endif /* HAVE_ICONV_H */ | |
61 | } | |
62 | ||
63 | ||
64 | /* | |
65 | * 'cupsCharsetToUTF8()' - Convert legacy character set to UTF-8. | |
66 | */ | |
67 | ||
68 | int /* O - Count or -1 on error */ | |
69 | cupsCharsetToUTF8( | |
70 | cups_utf8_t *dest, /* O - Target string */ | |
71 | const char *src, /* I - Source string */ | |
72 | const int maxout, /* I - Max output */ | |
73 | const cups_encoding_t encoding) /* I - Encoding */ | |
74 | { | |
75 | cups_utf8_t *destptr; /* Pointer into UTF-8 buffer */ | |
76 | #ifdef HAVE_ICONV_H | |
77 | size_t srclen, /* Length of source string */ | |
78 | outBytesLeft; /* Bytes remaining in output buffer */ | |
79 | #endif /* HAVE_ICONV_H */ | |
80 | ||
81 | ||
82 | /* | |
83 | * Check for valid arguments... | |
84 | */ | |
85 | ||
86 | DEBUG_printf(("2cupsCharsetToUTF8(dest=%p, src=\"%s\", maxout=%d, encoding=%d)", (void *)dest, src, maxout, encoding)); | |
87 | ||
88 | if (!dest || !src || maxout < 1) | |
89 | { | |
90 | if (dest) | |
91 | *dest = '\0'; | |
92 | ||
93 | DEBUG_puts("3cupsCharsetToUTF8: Bad arguments, returning -1"); | |
94 | return (-1); | |
95 | } | |
96 | ||
97 | /* | |
98 | * Handle identity conversions... | |
99 | */ | |
100 | ||
101 | if (encoding == CUPS_UTF8 || encoding <= CUPS_US_ASCII || | |
102 | encoding >= CUPS_ENCODING_VBCS_END) | |
103 | { | |
104 | strlcpy((char *)dest, src, (size_t)maxout); | |
105 | return ((int)strlen((char *)dest)); | |
106 | } | |
107 | ||
108 | /* | |
109 | * Handle ISO-8859-1 to UTF-8 directly... | |
110 | */ | |
111 | ||
112 | destptr = dest; | |
113 | ||
114 | if (encoding == CUPS_ISO8859_1) | |
115 | { | |
116 | int ch; /* Character from string */ | |
117 | cups_utf8_t *destend; /* End of UTF-8 buffer */ | |
118 | ||
119 | ||
120 | destend = dest + maxout - 2; | |
121 | ||
122 | while (*src && destptr < destend) | |
123 | { | |
124 | ch = *src++ & 255; | |
125 | ||
126 | if (ch & 128) | |
127 | { | |
128 | *destptr++ = (cups_utf8_t)(0xc0 | (ch >> 6)); | |
129 | *destptr++ = (cups_utf8_t)(0x80 | (ch & 0x3f)); | |
130 | } | |
131 | else | |
132 | *destptr++ = (cups_utf8_t)ch; | |
133 | } | |
134 | ||
135 | *destptr = '\0'; | |
136 | ||
137 | return ((int)(destptr - dest)); | |
138 | } | |
139 | ||
140 | /* | |
141 | * Convert input legacy charset to UTF-8... | |
142 | */ | |
143 | ||
144 | #ifdef HAVE_ICONV_H | |
145 | _cupsMutexLock(&map_mutex); | |
146 | ||
147 | if (map_encoding != encoding) | |
148 | { | |
149 | char toset[1024]; /* Destination character set */ | |
150 | ||
151 | _cupsCharmapFlush(); | |
152 | ||
153 | snprintf(toset, sizeof(toset), "%s//IGNORE", _cupsEncodingName(encoding)); | |
154 | ||
155 | map_encoding = encoding; | |
156 | map_from_utf8 = iconv_open(_cupsEncodingName(encoding), "UTF-8"); | |
157 | map_to_utf8 = iconv_open("UTF-8", toset); | |
158 | } | |
159 | ||
160 | if (map_to_utf8 != (iconv_t)-1) | |
161 | { | |
162 | char *altdestptr = (char *)dest; /* Silence bogus GCC type-punned */ | |
163 | ||
164 | srclen = strlen(src); | |
165 | outBytesLeft = (size_t)maxout - 1; | |
166 | ||
167 | iconv(map_to_utf8, (char **)&src, &srclen, &altdestptr, &outBytesLeft); | |
168 | *altdestptr = '\0'; | |
169 | ||
170 | _cupsMutexUnlock(&map_mutex); | |
171 | ||
172 | return ((int)(altdestptr - (char *)dest)); | |
173 | } | |
174 | ||
175 | _cupsMutexUnlock(&map_mutex); | |
176 | #endif /* HAVE_ICONV_H */ | |
177 | ||
178 | /* | |
179 | * No iconv() support, so error out... | |
180 | */ | |
181 | ||
182 | *destptr = '\0'; | |
183 | ||
184 | return (-1); | |
185 | } | |
186 | ||
187 | ||
188 | /* | |
189 | * 'cupsUTF8ToCharset()' - Convert UTF-8 to legacy character set. | |
190 | */ | |
191 | ||
192 | int /* O - Count or -1 on error */ | |
193 | cupsUTF8ToCharset( | |
194 | char *dest, /* O - Target string */ | |
195 | const cups_utf8_t *src, /* I - Source string */ | |
196 | const int maxout, /* I - Max output */ | |
197 | const cups_encoding_t encoding) /* I - Encoding */ | |
198 | { | |
199 | char *destptr; /* Pointer into destination */ | |
200 | #ifdef HAVE_ICONV_H | |
201 | size_t srclen, /* Length of source string */ | |
202 | outBytesLeft; /* Bytes remaining in output buffer */ | |
203 | #endif /* HAVE_ICONV_H */ | |
204 | ||
205 | ||
206 | /* | |
207 | * Check for valid arguments... | |
208 | */ | |
209 | ||
210 | if (!dest || !src || maxout < 1) | |
211 | { | |
212 | if (dest) | |
213 | *dest = '\0'; | |
214 | ||
215 | return (-1); | |
216 | } | |
217 | ||
218 | /* | |
219 | * Handle identity conversions... | |
220 | */ | |
221 | ||
222 | if (encoding == CUPS_UTF8 || | |
223 | encoding >= CUPS_ENCODING_VBCS_END) | |
224 | { | |
225 | strlcpy(dest, (char *)src, (size_t)maxout); | |
226 | return ((int)strlen(dest)); | |
227 | } | |
228 | ||
229 | /* | |
230 | * Handle UTF-8 to ISO-8859-1 directly... | |
231 | */ | |
232 | ||
233 | destptr = dest; | |
234 | ||
235 | if (encoding == CUPS_ISO8859_1 || encoding <= CUPS_US_ASCII) | |
236 | { | |
237 | int ch, /* Character from string */ | |
238 | maxch; /* Maximum character for charset */ | |
239 | char *destend; /* End of ISO-8859-1 buffer */ | |
240 | ||
241 | maxch = encoding == CUPS_ISO8859_1 ? 256 : 128; | |
242 | destend = dest + maxout - 1; | |
243 | ||
244 | while (*src && destptr < destend) | |
245 | { | |
246 | ch = *src++; | |
247 | ||
248 | if ((ch & 0xe0) == 0xc0) | |
249 | { | |
250 | ch = ((ch & 0x1f) << 6) | (*src++ & 0x3f); | |
251 | ||
252 | if (ch < maxch) | |
253 | *destptr++ = (char)ch; | |
254 | else | |
255 | *destptr++ = '?'; | |
256 | } | |
257 | else if ((ch & 0xf0) == 0xe0 || | |
258 | (ch & 0xf8) == 0xf0) | |
259 | *destptr++ = '?'; | |
260 | else if (!(ch & 0x80)) | |
261 | *destptr++ = (char)ch; | |
262 | } | |
263 | ||
264 | *destptr = '\0'; | |
265 | ||
266 | return ((int)(destptr - dest)); | |
267 | } | |
268 | ||
269 | #ifdef HAVE_ICONV_H | |
270 | /* | |
271 | * Convert input UTF-8 to legacy charset... | |
272 | */ | |
273 | ||
274 | _cupsMutexLock(&map_mutex); | |
275 | ||
276 | if (map_encoding != encoding) | |
277 | { | |
278 | char toset[1024]; /* Destination character set */ | |
279 | ||
280 | _cupsCharmapFlush(); | |
281 | ||
282 | snprintf(toset, sizeof(toset), "%s//IGNORE", _cupsEncodingName(encoding)); | |
283 | ||
284 | map_encoding = encoding; | |
285 | map_from_utf8 = iconv_open(_cupsEncodingName(encoding), "UTF-8"); | |
286 | map_to_utf8 = iconv_open("UTF-8", toset); | |
287 | } | |
288 | ||
289 | if (map_from_utf8 != (iconv_t)-1) | |
290 | { | |
291 | char *altsrc = (char *)src; /* Silence bogus GCC type-punned */ | |
292 | ||
293 | srclen = strlen((char *)src); | |
294 | outBytesLeft = (size_t)maxout - 1; | |
295 | ||
296 | iconv(map_from_utf8, &altsrc, &srclen, &destptr, &outBytesLeft); | |
297 | *destptr = '\0'; | |
298 | ||
299 | _cupsMutexUnlock(&map_mutex); | |
300 | ||
301 | return ((int)(destptr - dest)); | |
302 | } | |
303 | ||
304 | _cupsMutexUnlock(&map_mutex); | |
305 | #endif /* HAVE_ICONV_H */ | |
306 | ||
307 | /* | |
308 | * No iconv() support, so error out... | |
309 | */ | |
310 | ||
311 | *destptr = '\0'; | |
312 | ||
313 | return (-1); | |
314 | } | |
315 | ||
316 | ||
317 | /* | |
318 | * 'cupsUTF8ToUTF32()' - Convert UTF-8 to UTF-32. | |
319 | * | |
320 | * 32-bit UTF-32 (actually 21-bit) maps to UTF-8 as follows... | |
321 | * | |
322 | * UTF-32 char UTF-8 char(s) | |
323 | * -------------------------------------------------- | |
324 | * 0 to 127 = 0xxxxxxx (US-ASCII) | |
325 | * 128 to 2047 = 110xxxxx 10yyyyyy | |
326 | * 2048 to 65535 = 1110xxxx 10yyyyyy 10zzzzzz | |
327 | * > 65535 = 11110xxx 10yyyyyy 10zzzzzz 10xxxxxx | |
328 | * | |
329 | * UTF-32 prohibits chars beyond Plane 16 (> 0x10ffff) in UCS-4, | |
330 | * which would convert to five- or six-octet UTF-8 sequences... | |
331 | */ | |
332 | ||
333 | int /* O - Count or -1 on error */ | |
334 | cupsUTF8ToUTF32( | |
335 | cups_utf32_t *dest, /* O - Target string */ | |
336 | const cups_utf8_t *src, /* I - Source string */ | |
337 | const int maxout) /* I - Max output */ | |
338 | { | |
339 | int i; /* Looping variable */ | |
340 | cups_utf8_t ch; /* Character value */ | |
341 | cups_utf8_t next; /* Next character value */ | |
342 | cups_utf32_t ch32; /* UTF-32 character value */ | |
343 | ||
344 | ||
345 | /* | |
346 | * Check for valid arguments and clear output... | |
347 | */ | |
348 | ||
349 | DEBUG_printf(("2cupsUTF8ToUTF32(dest=%p, src=\"%s\", maxout=%d)", (void *)dest, src, maxout)); | |
350 | ||
351 | if (dest) | |
352 | *dest = 0; | |
353 | ||
354 | if (!dest || !src || maxout < 1 || maxout > CUPS_MAX_USTRING) | |
355 | { | |
356 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad arguments)"); | |
357 | ||
358 | return (-1); | |
359 | } | |
360 | ||
361 | /* | |
362 | * Convert input UTF-8 to output UTF-32... | |
363 | */ | |
364 | ||
365 | for (i = maxout - 1; *src && i > 0; i --) | |
366 | { | |
367 | ch = *src++; | |
368 | ||
369 | /* | |
370 | * Convert UTF-8 character(s) to UTF-32 character... | |
371 | */ | |
372 | ||
373 | if (!(ch & 0x80)) | |
374 | { | |
375 | /* | |
376 | * One-octet UTF-8 <= 127 (US-ASCII)... | |
377 | */ | |
378 | ||
379 | *dest++ = ch; | |
380 | ||
381 | DEBUG_printf(("4cupsUTF8ToUTF32: %02x => %08X", src[-1], ch)); | |
382 | continue; | |
383 | } | |
384 | else if ((ch & 0xe0) == 0xc0) | |
385 | { | |
386 | /* | |
387 | * Two-octet UTF-8 <= 2047 (Latin-x)... | |
388 | */ | |
389 | ||
390 | next = *src++; | |
391 | if ((next & 0xc0) != 0x80) | |
392 | { | |
393 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
394 | ||
395 | return (-1); | |
396 | } | |
397 | ||
398 | ch32 = (cups_utf32_t)((ch & 0x1f) << 6) | (cups_utf32_t)(next & 0x3f); | |
399 | ||
400 | /* | |
401 | * Check for non-shortest form (invalid UTF-8)... | |
402 | */ | |
403 | ||
404 | if (ch32 < 0x80) | |
405 | { | |
406 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
407 | ||
408 | return (-1); | |
409 | } | |
410 | ||
411 | *dest++ = ch32; | |
412 | ||
413 | DEBUG_printf(("4cupsUTF8ToUTF32: %02x %02x => %08X", | |
414 | src[-2], src[-1], (unsigned)ch32)); | |
415 | } | |
416 | else if ((ch & 0xf0) == 0xe0) | |
417 | { | |
418 | /* | |
419 | * Three-octet UTF-8 <= 65535 (Plane 0 - BMP)... | |
420 | */ | |
421 | ||
422 | next = *src++; | |
423 | if ((next & 0xc0) != 0x80) | |
424 | { | |
425 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
426 | ||
427 | return (-1); | |
428 | } | |
429 | ||
430 | ch32 = (cups_utf32_t)((ch & 0x0f) << 6) | (cups_utf32_t)(next & 0x3f); | |
431 | ||
432 | next = *src++; | |
433 | if ((next & 0xc0) != 0x80) | |
434 | { | |
435 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
436 | ||
437 | return (-1); | |
438 | } | |
439 | ||
440 | ch32 = (ch32 << 6) | (cups_utf32_t)(next & 0x3f); | |
441 | ||
442 | /* | |
443 | * Check for non-shortest form (invalid UTF-8)... | |
444 | */ | |
445 | ||
446 | if (ch32 < 0x800) | |
447 | { | |
448 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
449 | ||
450 | return (-1); | |
451 | } | |
452 | ||
453 | *dest++ = ch32; | |
454 | ||
455 | DEBUG_printf(("4cupsUTF8ToUTF32: %02x %02x %02x => %08X", | |
456 | src[-3], src[-2], src[-1], (unsigned)ch32)); | |
457 | } | |
458 | else if ((ch & 0xf8) == 0xf0) | |
459 | { | |
460 | /* | |
461 | * Four-octet UTF-8... | |
462 | */ | |
463 | ||
464 | next = *src++; | |
465 | if ((next & 0xc0) != 0x80) | |
466 | { | |
467 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
468 | ||
469 | return (-1); | |
470 | } | |
471 | ||
472 | ch32 = (cups_utf32_t)((ch & 0x07) << 6) | (cups_utf32_t)(next & 0x3f); | |
473 | ||
474 | next = *src++; | |
475 | if ((next & 0xc0) != 0x80) | |
476 | { | |
477 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
478 | ||
479 | return (-1); | |
480 | } | |
481 | ||
482 | ch32 = (ch32 << 6) | (cups_utf32_t)(next & 0x3f); | |
483 | ||
484 | next = *src++; | |
485 | if ((next & 0xc0) != 0x80) | |
486 | { | |
487 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
488 | ||
489 | return (-1); | |
490 | } | |
491 | ||
492 | ch32 = (ch32 << 6) | (cups_utf32_t)(next & 0x3f); | |
493 | ||
494 | /* | |
495 | * Check for non-shortest form (invalid UTF-8)... | |
496 | */ | |
497 | ||
498 | if (ch32 < 0x10000) | |
499 | { | |
500 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
501 | ||
502 | return (-1); | |
503 | } | |
504 | ||
505 | *dest++ = ch32; | |
506 | ||
507 | DEBUG_printf(("4cupsUTF8ToUTF32: %02x %02x %02x %02x => %08X", | |
508 | src[-4], src[-3], src[-2], src[-1], (unsigned)ch32)); | |
509 | } | |
510 | else | |
511 | { | |
512 | /* | |
513 | * More than 4-octet (invalid UTF-8 sequence)... | |
514 | */ | |
515 | ||
516 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
517 | ||
518 | return (-1); | |
519 | } | |
520 | ||
521 | /* | |
522 | * Check for UTF-16 surrogate (illegal UTF-8)... | |
523 | */ | |
524 | ||
525 | if (ch32 >= 0xd800 && ch32 <= 0xdfff) | |
526 | return (-1); | |
527 | } | |
528 | ||
529 | *dest = 0; | |
530 | ||
531 | DEBUG_printf(("3cupsUTF8ToUTF32: Returning %d characters", maxout - 1 - i)); | |
532 | ||
533 | return (maxout - 1 - i); | |
534 | } | |
535 | ||
536 | ||
537 | /* | |
538 | * 'cupsUTF32ToUTF8()' - Convert UTF-32 to UTF-8. | |
539 | * | |
540 | * 32-bit UTF-32 (actually 21-bit) maps to UTF-8 as follows... | |
541 | * | |
542 | * UTF-32 char UTF-8 char(s) | |
543 | * -------------------------------------------------- | |
544 | * 0 to 127 = 0xxxxxxx (US-ASCII) | |
545 | * 128 to 2047 = 110xxxxx 10yyyyyy | |
546 | * 2048 to 65535 = 1110xxxx 10yyyyyy 10zzzzzz | |
547 | * > 65535 = 11110xxx 10yyyyyy 10zzzzzz 10xxxxxx | |
548 | * | |
549 | * UTF-32 prohibits chars beyond Plane 16 (> 0x10ffff) in UCS-4, | |
550 | * which would convert to five- or six-octet UTF-8 sequences... | |
551 | */ | |
552 | ||
553 | int /* O - Count or -1 on error */ | |
554 | cupsUTF32ToUTF8( | |
555 | cups_utf8_t *dest, /* O - Target string */ | |
556 | const cups_utf32_t *src, /* I - Source string */ | |
557 | const int maxout) /* I - Max output */ | |
558 | { | |
559 | cups_utf8_t *start; /* Start of destination string */ | |
560 | int i; /* Looping variable */ | |
561 | int swap; /* Byte-swap input to output */ | |
562 | cups_utf32_t ch; /* Character value */ | |
563 | ||
564 | ||
565 | /* | |
566 | * Check for valid arguments and clear output... | |
567 | */ | |
568 | ||
569 | DEBUG_printf(("2cupsUTF32ToUTF8(dest=%p, src=%p, maxout=%d)", (void *)dest, (void *)src, maxout)); | |
570 | ||
571 | if (dest) | |
572 | *dest = '\0'; | |
573 | ||
574 | if (!dest || !src || maxout < 1) | |
575 | { | |
576 | DEBUG_puts("3cupsUTF32ToUTF8: Returning -1 (bad args)"); | |
577 | ||
578 | return (-1); | |
579 | } | |
580 | ||
581 | /* | |
582 | * Check for leading BOM in UTF-32 and inverted BOM... | |
583 | */ | |
584 | ||
585 | start = dest; | |
586 | swap = *src == 0xfffe0000; | |
587 | ||
588 | DEBUG_printf(("4cupsUTF32ToUTF8: swap=%d", swap)); | |
589 | ||
590 | if (*src == 0xfffe0000 || *src == 0xfeff) | |
591 | src ++; | |
592 | ||
593 | /* | |
594 | * Convert input UTF-32 to output UTF-8... | |
595 | */ | |
596 | ||
597 | for (i = maxout - 1; *src && i > 0;) | |
598 | { | |
599 | ch = *src++; | |
600 | ||
601 | /* | |
602 | * Byte swap input UTF-32, if necessary... | |
603 | * (only byte-swapping 24 of 32 bits) | |
604 | */ | |
605 | ||
606 | if (swap) | |
607 | ch = ((ch >> 24) | ((ch >> 8) & 0xff00) | ((ch << 8) & 0xff0000)); | |
608 | ||
609 | /* | |
610 | * Check for beyond Plane 16 (invalid UTF-32)... | |
611 | */ | |
612 | ||
613 | if (ch > 0x10ffff) | |
614 | { | |
615 | DEBUG_puts("3cupsUTF32ToUTF8: Returning -1 (character out of range)"); | |
616 | ||
617 | return (-1); | |
618 | } | |
619 | ||
620 | /* | |
621 | * Convert UTF-32 character to UTF-8 character(s)... | |
622 | */ | |
623 | ||
624 | if (ch < 0x80) | |
625 | { | |
626 | /* | |
627 | * One-octet UTF-8 <= 127 (US-ASCII)... | |
628 | */ | |
629 | ||
630 | *dest++ = (cups_utf8_t)ch; | |
631 | i --; | |
632 | ||
633 | DEBUG_printf(("4cupsUTF32ToUTF8: %08x => %02x", (unsigned)ch, dest[-1])); | |
634 | } | |
635 | else if (ch < 0x800) | |
636 | { | |
637 | /* | |
638 | * Two-octet UTF-8 <= 2047 (Latin-x)... | |
639 | */ | |
640 | ||
641 | if (i < 2) | |
642 | { | |
643 | DEBUG_puts("3cupsUTF32ToUTF8: Returning -1 (too long 2)"); | |
644 | ||
645 | return (-1); | |
646 | } | |
647 | ||
648 | *dest++ = (cups_utf8_t)(0xc0 | ((ch >> 6) & 0x1f)); | |
649 | *dest++ = (cups_utf8_t)(0x80 | (ch & 0x3f)); | |
650 | i -= 2; | |
651 | ||
652 | DEBUG_printf(("4cupsUTF32ToUTF8: %08x => %02x %02x", (unsigned)ch, | |
653 | dest[-2], dest[-1])); | |
654 | } | |
655 | else if (ch < 0x10000) | |
656 | { | |
657 | /* | |
658 | * Three-octet UTF-8 <= 65535 (Plane 0 - BMP)... | |
659 | */ | |
660 | ||
661 | if (i < 3) | |
662 | { | |
663 | DEBUG_puts("3cupsUTF32ToUTF8: Returning -1 (too long 3)"); | |
664 | ||
665 | return (-1); | |
666 | } | |
667 | ||
668 | *dest++ = (cups_utf8_t)(0xe0 | ((ch >> 12) & 0x0f)); | |
669 | *dest++ = (cups_utf8_t)(0x80 | ((ch >> 6) & 0x3f)); | |
670 | *dest++ = (cups_utf8_t)(0x80 | (ch & 0x3f)); | |
671 | i -= 3; | |
672 | ||
673 | DEBUG_printf(("4cupsUTF32ToUTF8: %08x => %02x %02x %02x", (unsigned)ch, | |
674 | dest[-3], dest[-2], dest[-1])); | |
675 | } | |
676 | else | |
677 | { | |
678 | /* | |
679 | * Four-octet UTF-8... | |
680 | */ | |
681 | ||
682 | if (i < 4) | |
683 | { | |
684 | DEBUG_puts("3cupsUTF32ToUTF8: Returning -1 (too long 4)"); | |
685 | ||
686 | return (-1); | |
687 | } | |
688 | ||
689 | *dest++ = (cups_utf8_t)(0xf0 | ((ch >> 18) & 0x07)); | |
690 | *dest++ = (cups_utf8_t)(0x80 | ((ch >> 12) & 0x3f)); | |
691 | *dest++ = (cups_utf8_t)(0x80 | ((ch >> 6) & 0x3f)); | |
692 | *dest++ = (cups_utf8_t)(0x80 | (ch & 0x3f)); | |
693 | i -= 4; | |
694 | ||
695 | DEBUG_printf(("4cupsUTF32ToUTF8: %08x => %02x %02x %02x %02x", | |
696 | (unsigned)ch, dest[-4], dest[-3], dest[-2], dest[-1])); | |
697 | } | |
698 | } | |
699 | ||
700 | *dest = '\0'; | |
701 | ||
702 | DEBUG_printf(("3cupsUTF32ToUTF8: Returning %d", (int)(dest - start))); | |
703 | ||
704 | return ((int)(dest - start)); | |
705 | } |