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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 | * These coded instructions, statements, and computer programs are the | |
8 | * property of Apple Inc. and are protected by Federal copyright | |
9 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
10 | * which should have been included with this file. If this file is | |
11 | * missing or damaged, see the license at "http://www.cups.org/". | |
12 | * | |
13 | * This file is subject to the Apple OS-Developed Software exception. | |
14 | */ | |
15 | ||
16 | /* | |
17 | * Include necessary headers... | |
18 | */ | |
19 | ||
20 | #include "cups-private.h" | |
21 | #include <limits.h> | |
22 | #include <time.h> | |
23 | #ifdef HAVE_ICONV_H | |
24 | # include <iconv.h> | |
25 | #endif /* HAVE_ICONV_H */ | |
26 | ||
27 | ||
28 | /* | |
29 | * Local globals... | |
30 | */ | |
31 | ||
32 | #ifdef HAVE_ICONV_H | |
33 | static _cups_mutex_t map_mutex = _CUPS_MUTEX_INITIALIZER; | |
34 | /* Mutex to control access to maps */ | |
35 | static iconv_t map_from_utf8 = (iconv_t)-1; | |
36 | /* Convert from UTF-8 to charset */ | |
37 | static iconv_t map_to_utf8 = (iconv_t)-1; | |
38 | /* Convert from charset to UTF-8 */ | |
39 | static cups_encoding_t map_encoding = CUPS_AUTO_ENCODING; | |
40 | /* Which charset is cached */ | |
41 | #endif /* HAVE_ICONV_H */ | |
42 | ||
43 | ||
44 | /* | |
45 | * '_cupsCharmapFlush()' - Flush all character set maps out of cache. | |
46 | */ | |
47 | ||
48 | void | |
49 | _cupsCharmapFlush(void) | |
50 | { | |
51 | #ifdef HAVE_ICONV_H | |
52 | if (map_from_utf8 != (iconv_t)-1) | |
53 | { | |
54 | iconv_close(map_from_utf8); | |
55 | map_from_utf8 = (iconv_t)-1; | |
56 | } | |
57 | ||
58 | if (map_to_utf8 != (iconv_t)-1) | |
59 | { | |
60 | iconv_close(map_to_utf8); | |
61 | map_to_utf8 = (iconv_t)-1; | |
62 | } | |
63 | ||
64 | map_encoding = CUPS_AUTO_ENCODING; | |
65 | #endif /* HAVE_ICONV_H */ | |
66 | } | |
67 | ||
68 | ||
69 | /* | |
70 | * 'cupsCharsetToUTF8()' - Convert legacy character set to UTF-8. | |
71 | */ | |
72 | ||
73 | int /* O - Count or -1 on error */ | |
74 | cupsCharsetToUTF8( | |
75 | cups_utf8_t *dest, /* O - Target string */ | |
76 | const char *src, /* I - Source string */ | |
77 | const int maxout, /* I - Max output */ | |
78 | const cups_encoding_t encoding) /* I - Encoding */ | |
79 | { | |
80 | cups_utf8_t *destptr; /* Pointer into UTF-8 buffer */ | |
81 | #ifdef HAVE_ICONV_H | |
82 | size_t srclen, /* Length of source string */ | |
83 | outBytesLeft; /* Bytes remaining in output buffer */ | |
84 | #endif /* HAVE_ICONV_H */ | |
85 | ||
86 | ||
87 | /* | |
88 | * Check for valid arguments... | |
89 | */ | |
90 | ||
91 | DEBUG_printf(("2cupsCharsetToUTF8(dest=%p, src=\"%s\", maxout=%d, encoding=%d)", (void *)dest, src, maxout, encoding)); | |
92 | ||
93 | if (!dest || !src || maxout < 1) | |
94 | { | |
95 | if (dest) | |
96 | *dest = '\0'; | |
97 | ||
98 | DEBUG_puts("3cupsCharsetToUTF8: Bad arguments, returning -1"); | |
99 | return (-1); | |
100 | } | |
101 | ||
102 | /* | |
103 | * Handle identity conversions... | |
104 | */ | |
105 | ||
106 | if (encoding == CUPS_UTF8 || encoding <= CUPS_US_ASCII || | |
107 | encoding >= CUPS_ENCODING_VBCS_END) | |
108 | { | |
109 | strlcpy((char *)dest, src, (size_t)maxout); | |
110 | return ((int)strlen((char *)dest)); | |
111 | } | |
112 | ||
113 | /* | |
114 | * Handle ISO-8859-1 to UTF-8 directly... | |
115 | */ | |
116 | ||
117 | destptr = dest; | |
118 | ||
119 | if (encoding == CUPS_ISO8859_1) | |
120 | { | |
121 | int ch; /* Character from string */ | |
122 | cups_utf8_t *destend; /* End of UTF-8 buffer */ | |
123 | ||
124 | ||
125 | destend = dest + maxout - 2; | |
126 | ||
127 | while (*src && destptr < destend) | |
128 | { | |
129 | ch = *src++ & 255; | |
130 | ||
131 | if (ch & 128) | |
132 | { | |
133 | *destptr++ = (cups_utf8_t)(0xc0 | (ch >> 6)); | |
134 | *destptr++ = (cups_utf8_t)(0x80 | (ch & 0x3f)); | |
135 | } | |
136 | else | |
137 | *destptr++ = (cups_utf8_t)ch; | |
138 | } | |
139 | ||
140 | *destptr = '\0'; | |
141 | ||
142 | return ((int)(destptr - dest)); | |
143 | } | |
144 | ||
145 | /* | |
146 | * Convert input legacy charset to UTF-8... | |
147 | */ | |
148 | ||
149 | #ifdef HAVE_ICONV_H | |
150 | _cupsMutexLock(&map_mutex); | |
151 | ||
152 | if (map_encoding != encoding) | |
153 | { | |
154 | char toset[1024]; /* Destination character set */ | |
155 | ||
156 | _cupsCharmapFlush(); | |
157 | ||
158 | snprintf(toset, sizeof(toset), "%s//IGNORE", _cupsEncodingName(encoding)); | |
159 | ||
160 | map_encoding = encoding; | |
161 | map_from_utf8 = iconv_open(_cupsEncodingName(encoding), "UTF-8"); | |
162 | map_to_utf8 = iconv_open("UTF-8", toset); | |
163 | } | |
164 | ||
165 | if (map_to_utf8 != (iconv_t)-1) | |
166 | { | |
167 | char *altdestptr = (char *)dest; /* Silence bogus GCC type-punned */ | |
168 | ||
169 | srclen = strlen(src); | |
170 | outBytesLeft = (size_t)maxout - 1; | |
171 | ||
172 | iconv(map_to_utf8, (char **)&src, &srclen, &altdestptr, &outBytesLeft); | |
173 | *altdestptr = '\0'; | |
174 | ||
175 | _cupsMutexUnlock(&map_mutex); | |
176 | ||
177 | return ((int)(altdestptr - (char *)dest)); | |
178 | } | |
179 | ||
180 | _cupsMutexUnlock(&map_mutex); | |
181 | #endif /* HAVE_ICONV_H */ | |
182 | ||
183 | /* | |
184 | * No iconv() support, so error out... | |
185 | */ | |
186 | ||
187 | *destptr = '\0'; | |
188 | ||
189 | return (-1); | |
190 | } | |
191 | ||
192 | ||
193 | /* | |
194 | * 'cupsUTF8ToCharset()' - Convert UTF-8 to legacy character set. | |
195 | */ | |
196 | ||
197 | int /* O - Count or -1 on error */ | |
198 | cupsUTF8ToCharset( | |
199 | char *dest, /* O - Target string */ | |
200 | const cups_utf8_t *src, /* I - Source string */ | |
201 | const int maxout, /* I - Max output */ | |
202 | const cups_encoding_t encoding) /* I - Encoding */ | |
203 | { | |
204 | char *destptr; /* Pointer into destination */ | |
205 | #ifdef HAVE_ICONV_H | |
206 | size_t srclen, /* Length of source string */ | |
207 | outBytesLeft; /* Bytes remaining in output buffer */ | |
208 | #endif /* HAVE_ICONV_H */ | |
209 | ||
210 | ||
211 | /* | |
212 | * Check for valid arguments... | |
213 | */ | |
214 | ||
215 | if (!dest || !src || maxout < 1) | |
216 | { | |
217 | if (dest) | |
218 | *dest = '\0'; | |
219 | ||
220 | return (-1); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Handle identity conversions... | |
225 | */ | |
226 | ||
227 | if (encoding == CUPS_UTF8 || | |
228 | encoding >= CUPS_ENCODING_VBCS_END) | |
229 | { | |
230 | strlcpy(dest, (char *)src, (size_t)maxout); | |
231 | return ((int)strlen(dest)); | |
232 | } | |
233 | ||
234 | /* | |
235 | * Handle UTF-8 to ISO-8859-1 directly... | |
236 | */ | |
237 | ||
238 | destptr = dest; | |
239 | ||
240 | if (encoding == CUPS_ISO8859_1 || encoding <= CUPS_US_ASCII) | |
241 | { | |
242 | int ch, /* Character from string */ | |
243 | maxch; /* Maximum character for charset */ | |
244 | char *destend; /* End of ISO-8859-1 buffer */ | |
245 | ||
246 | maxch = encoding == CUPS_ISO8859_1 ? 256 : 128; | |
247 | destend = dest + maxout - 1; | |
248 | ||
249 | while (*src && destptr < destend) | |
250 | { | |
251 | ch = *src++; | |
252 | ||
253 | if ((ch & 0xe0) == 0xc0) | |
254 | { | |
255 | ch = ((ch & 0x1f) << 6) | (*src++ & 0x3f); | |
256 | ||
257 | if (ch < maxch) | |
258 | *destptr++ = (char)ch; | |
259 | else | |
260 | *destptr++ = '?'; | |
261 | } | |
262 | else if ((ch & 0xf0) == 0xe0 || | |
263 | (ch & 0xf8) == 0xf0) | |
264 | *destptr++ = '?'; | |
265 | else if (!(ch & 0x80)) | |
266 | *destptr++ = (char)ch; | |
267 | } | |
268 | ||
269 | *destptr = '\0'; | |
270 | ||
271 | return ((int)(destptr - dest)); | |
272 | } | |
273 | ||
274 | #ifdef HAVE_ICONV_H | |
275 | /* | |
276 | * Convert input UTF-8 to legacy charset... | |
277 | */ | |
278 | ||
279 | _cupsMutexLock(&map_mutex); | |
280 | ||
281 | if (map_encoding != encoding) | |
282 | { | |
283 | char toset[1024]; /* Destination character set */ | |
284 | ||
285 | _cupsCharmapFlush(); | |
286 | ||
287 | snprintf(toset, sizeof(toset), "%s//IGNORE", _cupsEncodingName(encoding)); | |
288 | ||
289 | map_encoding = encoding; | |
290 | map_from_utf8 = iconv_open(_cupsEncodingName(encoding), "UTF-8"); | |
291 | map_to_utf8 = iconv_open("UTF-8", toset); | |
292 | } | |
293 | ||
294 | if (map_from_utf8 != (iconv_t)-1) | |
295 | { | |
296 | char *altsrc = (char *)src; /* Silence bogus GCC type-punned */ | |
297 | ||
298 | srclen = strlen((char *)src); | |
299 | outBytesLeft = (size_t)maxout - 1; | |
300 | ||
301 | iconv(map_from_utf8, &altsrc, &srclen, &destptr, &outBytesLeft); | |
302 | *destptr = '\0'; | |
303 | ||
304 | _cupsMutexUnlock(&map_mutex); | |
305 | ||
306 | return ((int)(destptr - dest)); | |
307 | } | |
308 | ||
309 | _cupsMutexUnlock(&map_mutex); | |
310 | #endif /* HAVE_ICONV_H */ | |
311 | ||
312 | /* | |
313 | * No iconv() support, so error out... | |
314 | */ | |
315 | ||
316 | *destptr = '\0'; | |
317 | ||
318 | return (-1); | |
319 | } | |
320 | ||
321 | ||
322 | /* | |
323 | * 'cupsUTF8ToUTF32()' - Convert UTF-8 to UTF-32. | |
324 | * | |
325 | * 32-bit UTF-32 (actually 21-bit) maps to UTF-8 as follows... | |
326 | * | |
327 | * UTF-32 char UTF-8 char(s) | |
328 | * -------------------------------------------------- | |
329 | * 0 to 127 = 0xxxxxxx (US-ASCII) | |
330 | * 128 to 2047 = 110xxxxx 10yyyyyy | |
331 | * 2048 to 65535 = 1110xxxx 10yyyyyy 10zzzzzz | |
332 | * > 65535 = 11110xxx 10yyyyyy 10zzzzzz 10xxxxxx | |
333 | * | |
334 | * UTF-32 prohibits chars beyond Plane 16 (> 0x10ffff) in UCS-4, | |
335 | * which would convert to five- or six-octet UTF-8 sequences... | |
336 | */ | |
337 | ||
338 | int /* O - Count or -1 on error */ | |
339 | cupsUTF8ToUTF32( | |
340 | cups_utf32_t *dest, /* O - Target string */ | |
341 | const cups_utf8_t *src, /* I - Source string */ | |
342 | const int maxout) /* I - Max output */ | |
343 | { | |
344 | int i; /* Looping variable */ | |
345 | cups_utf8_t ch; /* Character value */ | |
346 | cups_utf8_t next; /* Next character value */ | |
347 | cups_utf32_t ch32; /* UTF-32 character value */ | |
348 | ||
349 | ||
350 | /* | |
351 | * Check for valid arguments and clear output... | |
352 | */ | |
353 | ||
354 | DEBUG_printf(("2cupsUTF8ToUTF32(dest=%p, src=\"%s\", maxout=%d)", (void *)dest, src, maxout)); | |
355 | ||
356 | if (dest) | |
357 | *dest = 0; | |
358 | ||
359 | if (!dest || !src || maxout < 1 || maxout > CUPS_MAX_USTRING) | |
360 | { | |
361 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad arguments)"); | |
362 | ||
363 | return (-1); | |
364 | } | |
365 | ||
366 | /* | |
367 | * Convert input UTF-8 to output UTF-32... | |
368 | */ | |
369 | ||
370 | for (i = maxout - 1; *src && i > 0; i --) | |
371 | { | |
372 | ch = *src++; | |
373 | ||
374 | /* | |
375 | * Convert UTF-8 character(s) to UTF-32 character... | |
376 | */ | |
377 | ||
378 | if (!(ch & 0x80)) | |
379 | { | |
380 | /* | |
381 | * One-octet UTF-8 <= 127 (US-ASCII)... | |
382 | */ | |
383 | ||
384 | *dest++ = ch; | |
385 | ||
386 | DEBUG_printf(("4cupsUTF8ToUTF32: %02x => %08X", src[-1], ch)); | |
387 | continue; | |
388 | } | |
389 | else if ((ch & 0xe0) == 0xc0) | |
390 | { | |
391 | /* | |
392 | * Two-octet UTF-8 <= 2047 (Latin-x)... | |
393 | */ | |
394 | ||
395 | next = *src++; | |
396 | if ((next & 0xc0) != 0x80) | |
397 | { | |
398 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
399 | ||
400 | return (-1); | |
401 | } | |
402 | ||
403 | ch32 = (cups_utf32_t)((ch & 0x1f) << 6) | (cups_utf32_t)(next & 0x3f); | |
404 | ||
405 | /* | |
406 | * Check for non-shortest form (invalid UTF-8)... | |
407 | */ | |
408 | ||
409 | if (ch32 < 0x80) | |
410 | { | |
411 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
412 | ||
413 | return (-1); | |
414 | } | |
415 | ||
416 | *dest++ = ch32; | |
417 | ||
418 | DEBUG_printf(("4cupsUTF8ToUTF32: %02x %02x => %08X", | |
419 | src[-2], src[-1], (unsigned)ch32)); | |
420 | } | |
421 | else if ((ch & 0xf0) == 0xe0) | |
422 | { | |
423 | /* | |
424 | * Three-octet UTF-8 <= 65535 (Plane 0 - BMP)... | |
425 | */ | |
426 | ||
427 | next = *src++; | |
428 | if ((next & 0xc0) != 0x80) | |
429 | { | |
430 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
431 | ||
432 | return (-1); | |
433 | } | |
434 | ||
435 | ch32 = (cups_utf32_t)((ch & 0x0f) << 6) | (cups_utf32_t)(next & 0x3f); | |
436 | ||
437 | next = *src++; | |
438 | if ((next & 0xc0) != 0x80) | |
439 | { | |
440 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
441 | ||
442 | return (-1); | |
443 | } | |
444 | ||
445 | ch32 = (ch32 << 6) | (cups_utf32_t)(next & 0x3f); | |
446 | ||
447 | /* | |
448 | * Check for non-shortest form (invalid UTF-8)... | |
449 | */ | |
450 | ||
451 | if (ch32 < 0x800) | |
452 | { | |
453 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
454 | ||
455 | return (-1); | |
456 | } | |
457 | ||
458 | *dest++ = ch32; | |
459 | ||
460 | DEBUG_printf(("4cupsUTF8ToUTF32: %02x %02x %02x => %08X", | |
461 | src[-3], src[-2], src[-1], (unsigned)ch32)); | |
462 | } | |
463 | else if ((ch & 0xf8) == 0xf0) | |
464 | { | |
465 | /* | |
466 | * Four-octet UTF-8... | |
467 | */ | |
468 | ||
469 | next = *src++; | |
470 | if ((next & 0xc0) != 0x80) | |
471 | { | |
472 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
473 | ||
474 | return (-1); | |
475 | } | |
476 | ||
477 | ch32 = (cups_utf32_t)((ch & 0x07) << 6) | (cups_utf32_t)(next & 0x3f); | |
478 | ||
479 | next = *src++; | |
480 | if ((next & 0xc0) != 0x80) | |
481 | { | |
482 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
483 | ||
484 | return (-1); | |
485 | } | |
486 | ||
487 | ch32 = (ch32 << 6) | (cups_utf32_t)(next & 0x3f); | |
488 | ||
489 | next = *src++; | |
490 | if ((next & 0xc0) != 0x80) | |
491 | { | |
492 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
493 | ||
494 | return (-1); | |
495 | } | |
496 | ||
497 | ch32 = (ch32 << 6) | (cups_utf32_t)(next & 0x3f); | |
498 | ||
499 | /* | |
500 | * Check for non-shortest form (invalid UTF-8)... | |
501 | */ | |
502 | ||
503 | if (ch32 < 0x10000) | |
504 | { | |
505 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
506 | ||
507 | return (-1); | |
508 | } | |
509 | ||
510 | *dest++ = ch32; | |
511 | ||
512 | DEBUG_printf(("4cupsUTF8ToUTF32: %02x %02x %02x %02x => %08X", | |
513 | src[-4], src[-3], src[-2], src[-1], (unsigned)ch32)); | |
514 | } | |
515 | else | |
516 | { | |
517 | /* | |
518 | * More than 4-octet (invalid UTF-8 sequence)... | |
519 | */ | |
520 | ||
521 | DEBUG_puts("3cupsUTF8ToUTF32: Returning -1 (bad UTF-8 sequence)"); | |
522 | ||
523 | return (-1); | |
524 | } | |
525 | ||
526 | /* | |
527 | * Check for UTF-16 surrogate (illegal UTF-8)... | |
528 | */ | |
529 | ||
530 | if (ch32 >= 0xd800 && ch32 <= 0xdfff) | |
531 | return (-1); | |
532 | } | |
533 | ||
534 | *dest = 0; | |
535 | ||
536 | DEBUG_printf(("3cupsUTF8ToUTF32: Returning %d characters", maxout - 1 - i)); | |
537 | ||
538 | return (maxout - 1 - i); | |
539 | } | |
540 | ||
541 | ||
542 | /* | |
543 | * 'cupsUTF32ToUTF8()' - Convert UTF-32 to UTF-8. | |
544 | * | |
545 | * 32-bit UTF-32 (actually 21-bit) maps to UTF-8 as follows... | |
546 | * | |
547 | * UTF-32 char UTF-8 char(s) | |
548 | * -------------------------------------------------- | |
549 | * 0 to 127 = 0xxxxxxx (US-ASCII) | |
550 | * 128 to 2047 = 110xxxxx 10yyyyyy | |
551 | * 2048 to 65535 = 1110xxxx 10yyyyyy 10zzzzzz | |
552 | * > 65535 = 11110xxx 10yyyyyy 10zzzzzz 10xxxxxx | |
553 | * | |
554 | * UTF-32 prohibits chars beyond Plane 16 (> 0x10ffff) in UCS-4, | |
555 | * which would convert to five- or six-octet UTF-8 sequences... | |
556 | */ | |
557 | ||
558 | int /* O - Count or -1 on error */ | |
559 | cupsUTF32ToUTF8( | |
560 | cups_utf8_t *dest, /* O - Target string */ | |
561 | const cups_utf32_t *src, /* I - Source string */ | |
562 | const int maxout) /* I - Max output */ | |
563 | { | |
564 | cups_utf8_t *start; /* Start of destination string */ | |
565 | int i; /* Looping variable */ | |
566 | int swap; /* Byte-swap input to output */ | |
567 | cups_utf32_t ch; /* Character value */ | |
568 | ||
569 | ||
570 | /* | |
571 | * Check for valid arguments and clear output... | |
572 | */ | |
573 | ||
574 | DEBUG_printf(("2cupsUTF32ToUTF8(dest=%p, src=%p, maxout=%d)", (void *)dest, (void *)src, maxout)); | |
575 | ||
576 | if (dest) | |
577 | *dest = '\0'; | |
578 | ||
579 | if (!dest || !src || maxout < 1) | |
580 | { | |
581 | DEBUG_puts("3cupsUTF32ToUTF8: Returning -1 (bad args)"); | |
582 | ||
583 | return (-1); | |
584 | } | |
585 | ||
586 | /* | |
587 | * Check for leading BOM in UTF-32 and inverted BOM... | |
588 | */ | |
589 | ||
590 | start = dest; | |
591 | swap = *src == 0xfffe0000; | |
592 | ||
593 | DEBUG_printf(("4cupsUTF32ToUTF8: swap=%d", swap)); | |
594 | ||
595 | if (*src == 0xfffe0000 || *src == 0xfeff) | |
596 | src ++; | |
597 | ||
598 | /* | |
599 | * Convert input UTF-32 to output UTF-8... | |
600 | */ | |
601 | ||
602 | for (i = maxout - 1; *src && i > 0;) | |
603 | { | |
604 | ch = *src++; | |
605 | ||
606 | /* | |
607 | * Byte swap input UTF-32, if necessary... | |
608 | * (only byte-swapping 24 of 32 bits) | |
609 | */ | |
610 | ||
611 | if (swap) | |
612 | ch = ((ch >> 24) | ((ch >> 8) & 0xff00) | ((ch << 8) & 0xff0000)); | |
613 | ||
614 | /* | |
615 | * Check for beyond Plane 16 (invalid UTF-32)... | |
616 | */ | |
617 | ||
618 | if (ch > 0x10ffff) | |
619 | { | |
620 | DEBUG_puts("3cupsUTF32ToUTF8: Returning -1 (character out of range)"); | |
621 | ||
622 | return (-1); | |
623 | } | |
624 | ||
625 | /* | |
626 | * Convert UTF-32 character to UTF-8 character(s)... | |
627 | */ | |
628 | ||
629 | if (ch < 0x80) | |
630 | { | |
631 | /* | |
632 | * One-octet UTF-8 <= 127 (US-ASCII)... | |
633 | */ | |
634 | ||
635 | *dest++ = (cups_utf8_t)ch; | |
636 | i --; | |
637 | ||
638 | DEBUG_printf(("4cupsUTF32ToUTF8: %08x => %02x", (unsigned)ch, dest[-1])); | |
639 | } | |
640 | else if (ch < 0x800) | |
641 | { | |
642 | /* | |
643 | * Two-octet UTF-8 <= 2047 (Latin-x)... | |
644 | */ | |
645 | ||
646 | if (i < 2) | |
647 | { | |
648 | DEBUG_puts("3cupsUTF32ToUTF8: Returning -1 (too long 2)"); | |
649 | ||
650 | return (-1); | |
651 | } | |
652 | ||
653 | *dest++ = (cups_utf8_t)(0xc0 | ((ch >> 6) & 0x1f)); | |
654 | *dest++ = (cups_utf8_t)(0x80 | (ch & 0x3f)); | |
655 | i -= 2; | |
656 | ||
657 | DEBUG_printf(("4cupsUTF32ToUTF8: %08x => %02x %02x", (unsigned)ch, | |
658 | dest[-2], dest[-1])); | |
659 | } | |
660 | else if (ch < 0x10000) | |
661 | { | |
662 | /* | |
663 | * Three-octet UTF-8 <= 65535 (Plane 0 - BMP)... | |
664 | */ | |
665 | ||
666 | if (i < 3) | |
667 | { | |
668 | DEBUG_puts("3cupsUTF32ToUTF8: Returning -1 (too long 3)"); | |
669 | ||
670 | return (-1); | |
671 | } | |
672 | ||
673 | *dest++ = (cups_utf8_t)(0xe0 | ((ch >> 12) & 0x0f)); | |
674 | *dest++ = (cups_utf8_t)(0x80 | ((ch >> 6) & 0x3f)); | |
675 | *dest++ = (cups_utf8_t)(0x80 | (ch & 0x3f)); | |
676 | i -= 3; | |
677 | ||
678 | DEBUG_printf(("4cupsUTF32ToUTF8: %08x => %02x %02x %02x", (unsigned)ch, | |
679 | dest[-3], dest[-2], dest[-1])); | |
680 | } | |
681 | else | |
682 | { | |
683 | /* | |
684 | * Four-octet UTF-8... | |
685 | */ | |
686 | ||
687 | if (i < 4) | |
688 | { | |
689 | DEBUG_puts("3cupsUTF32ToUTF8: Returning -1 (too long 4)"); | |
690 | ||
691 | return (-1); | |
692 | } | |
693 | ||
694 | *dest++ = (cups_utf8_t)(0xf0 | ((ch >> 18) & 0x07)); | |
695 | *dest++ = (cups_utf8_t)(0x80 | ((ch >> 12) & 0x3f)); | |
696 | *dest++ = (cups_utf8_t)(0x80 | ((ch >> 6) & 0x3f)); | |
697 | *dest++ = (cups_utf8_t)(0x80 | (ch & 0x3f)); | |
698 | i -= 4; | |
699 | ||
700 | DEBUG_printf(("4cupsUTF32ToUTF8: %08x => %02x %02x %02x %02x", | |
701 | (unsigned)ch, dest[-4], dest[-3], dest[-2], dest[-1])); | |
702 | } | |
703 | } | |
704 | ||
705 | *dest = '\0'; | |
706 | ||
707 | DEBUG_printf(("3cupsUTF32ToUTF8: Returning %d", (int)(dest - start))); | |
708 | ||
709 | return ((int)(dest - start)); | |
710 | } |