diff options
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/libpng/pngerror.c')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/libpng/pngerror.c | 685 |
1 files changed, 685 insertions, 0 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/libpng/pngerror.c b/libraries/irrlicht-1.8/source/Irrlicht/libpng/pngerror.c new file mode 100644 index 0000000..9df97f5 --- /dev/null +++ b/libraries/irrlicht-1.8/source/Irrlicht/libpng/pngerror.c | |||
@@ -0,0 +1,685 @@ | |||
1 | |||
2 | /* pngerror.c - stub functions for i/o and memory allocation | ||
3 | * | ||
4 | * Last changed in libpng 1.5.8 [February 1, 2011] | ||
5 | * Copyright (c) 1998-2012 Glenn Randers-Pehrson | ||
6 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) | ||
7 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) | ||
8 | * | ||
9 | * This code is released under the libpng license. | ||
10 | * For conditions of distribution and use, see the disclaimer | ||
11 | * and license in png.h | ||
12 | * | ||
13 | * This file provides a location for all error handling. Users who | ||
14 | * need special error handling are expected to write replacement functions | ||
15 | * and use png_set_error_fn() to use those functions. See the instructions | ||
16 | * at each function. | ||
17 | */ | ||
18 | |||
19 | #include "pngpriv.h" | ||
20 | |||
21 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) | ||
22 | |||
23 | static PNG_FUNCTION(void, png_default_error,PNGARG((png_structp png_ptr, | ||
24 | png_const_charp error_message)),PNG_NORETURN); | ||
25 | |||
26 | #ifdef PNG_WARNINGS_SUPPORTED | ||
27 | static void /* PRIVATE */ | ||
28 | png_default_warning PNGARG((png_structp png_ptr, | ||
29 | png_const_charp warning_message)); | ||
30 | #endif /* PNG_WARNINGS_SUPPORTED */ | ||
31 | |||
32 | /* This function is called whenever there is a fatal error. This function | ||
33 | * should not be changed. If there is a need to handle errors differently, | ||
34 | * you should supply a replacement error function and use png_set_error_fn() | ||
35 | * to replace the error function at run-time. | ||
36 | */ | ||
37 | #ifdef PNG_ERROR_TEXT_SUPPORTED | ||
38 | PNG_FUNCTION(void,PNGAPI | ||
39 | png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN) | ||
40 | { | ||
41 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED | ||
42 | char msg[16]; | ||
43 | if (png_ptr != NULL) | ||
44 | { | ||
45 | if (png_ptr->flags& | ||
46 | (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) | ||
47 | { | ||
48 | if (*error_message == PNG_LITERAL_SHARP) | ||
49 | { | ||
50 | /* Strip "#nnnn " from beginning of error message. */ | ||
51 | int offset; | ||
52 | for (offset = 1; offset<15; offset++) | ||
53 | if (error_message[offset] == ' ') | ||
54 | break; | ||
55 | |||
56 | if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT) | ||
57 | { | ||
58 | int i; | ||
59 | for (i = 0; i < offset - 1; i++) | ||
60 | msg[i] = error_message[i + 1]; | ||
61 | msg[i - 1] = '\0'; | ||
62 | error_message = msg; | ||
63 | } | ||
64 | |||
65 | else | ||
66 | error_message += offset; | ||
67 | } | ||
68 | |||
69 | else | ||
70 | { | ||
71 | if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT) | ||
72 | { | ||
73 | msg[0] = '0'; | ||
74 | msg[1] = '\0'; | ||
75 | error_message = msg; | ||
76 | } | ||
77 | } | ||
78 | } | ||
79 | } | ||
80 | #endif | ||
81 | if (png_ptr != NULL && png_ptr->error_fn != NULL) | ||
82 | (*(png_ptr->error_fn))(png_ptr, error_message); | ||
83 | |||
84 | /* If the custom handler doesn't exist, or if it returns, | ||
85 | use the default handler, which will not return. */ | ||
86 | png_default_error(png_ptr, error_message); | ||
87 | } | ||
88 | #else | ||
89 | PNG_FUNCTION(void,PNGAPI | ||
90 | png_err,(png_structp png_ptr),PNG_NORETURN) | ||
91 | { | ||
92 | /* Prior to 1.5.2 the error_fn received a NULL pointer, expressed | ||
93 | * erroneously as '\0', instead of the empty string "". This was | ||
94 | * apparently an error, introduced in libpng-1.2.20, and png_default_error | ||
95 | * will crash in this case. | ||
96 | */ | ||
97 | if (png_ptr != NULL && png_ptr->error_fn != NULL) | ||
98 | (*(png_ptr->error_fn))(png_ptr, ""); | ||
99 | |||
100 | /* If the custom handler doesn't exist, or if it returns, | ||
101 | use the default handler, which will not return. */ | ||
102 | png_default_error(png_ptr, ""); | ||
103 | } | ||
104 | #endif /* PNG_ERROR_TEXT_SUPPORTED */ | ||
105 | |||
106 | /* Utility to safely appends strings to a buffer. This never errors out so | ||
107 | * error checking is not required in the caller. | ||
108 | */ | ||
109 | size_t | ||
110 | png_safecat(png_charp buffer, size_t bufsize, size_t pos, | ||
111 | png_const_charp string) | ||
112 | { | ||
113 | if (buffer != NULL && pos < bufsize) | ||
114 | { | ||
115 | if (string != NULL) | ||
116 | while (*string != '\0' && pos < bufsize-1) | ||
117 | buffer[pos++] = *string++; | ||
118 | |||
119 | buffer[pos] = '\0'; | ||
120 | } | ||
121 | |||
122 | return pos; | ||
123 | } | ||
124 | |||
125 | #if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_TIME_RFC1123_SUPPORTED) | ||
126 | /* Utility to dump an unsigned value into a buffer, given a start pointer and | ||
127 | * and end pointer (which should point just *beyond* the end of the buffer!) | ||
128 | * Returns the pointer to the start of the formatted string. | ||
129 | */ | ||
130 | png_charp | ||
131 | png_format_number(png_const_charp start, png_charp end, int format, | ||
132 | png_alloc_size_t number) | ||
133 | { | ||
134 | int count = 0; /* number of digits output */ | ||
135 | int mincount = 1; /* minimum number required */ | ||
136 | int output = 0; /* digit output (for the fixed point format) */ | ||
137 | |||
138 | *--end = '\0'; | ||
139 | |||
140 | /* This is written so that the loop always runs at least once, even with | ||
141 | * number zero. | ||
142 | */ | ||
143 | while (end > start && (number != 0 || count < mincount)) | ||
144 | { | ||
145 | |||
146 | static const char digits[] = "0123456789ABCDEF"; | ||
147 | |||
148 | switch (format) | ||
149 | { | ||
150 | case PNG_NUMBER_FORMAT_fixed: | ||
151 | /* Needs five digits (the fraction) */ | ||
152 | mincount = 5; | ||
153 | if (output || number % 10 != 0) | ||
154 | { | ||
155 | *--end = digits[number % 10]; | ||
156 | output = 1; | ||
157 | } | ||
158 | number /= 10; | ||
159 | break; | ||
160 | |||
161 | case PNG_NUMBER_FORMAT_02u: | ||
162 | /* Expects at least 2 digits. */ | ||
163 | mincount = 2; | ||
164 | /* fall through */ | ||
165 | |||
166 | case PNG_NUMBER_FORMAT_u: | ||
167 | *--end = digits[number % 10]; | ||
168 | number /= 10; | ||
169 | break; | ||
170 | |||
171 | case PNG_NUMBER_FORMAT_02x: | ||
172 | /* This format expects at least two digits */ | ||
173 | mincount = 2; | ||
174 | /* fall through */ | ||
175 | |||
176 | case PNG_NUMBER_FORMAT_x: | ||
177 | *--end = digits[number & 0xf]; | ||
178 | number >>= 4; | ||
179 | break; | ||
180 | |||
181 | default: /* an error */ | ||
182 | number = 0; | ||
183 | break; | ||
184 | } | ||
185 | |||
186 | /* Keep track of the number of digits added */ | ||
187 | ++count; | ||
188 | |||
189 | /* Float a fixed number here: */ | ||
190 | if (format == PNG_NUMBER_FORMAT_fixed) if (count == 5) if (end > start) | ||
191 | { | ||
192 | /* End of the fraction, but maybe nothing was output? In that case | ||
193 | * drop the decimal point. If the number is a true zero handle that | ||
194 | * here. | ||
195 | */ | ||
196 | if (output) | ||
197 | *--end = '.'; | ||
198 | else if (number == 0) /* and !output */ | ||
199 | *--end = '0'; | ||
200 | } | ||
201 | } | ||
202 | |||
203 | return end; | ||
204 | } | ||
205 | #endif | ||
206 | |||
207 | #ifdef PNG_WARNINGS_SUPPORTED | ||
208 | /* This function is called whenever there is a non-fatal error. This function | ||
209 | * should not be changed. If there is a need to handle warnings differently, | ||
210 | * you should supply a replacement warning function and use | ||
211 | * png_set_error_fn() to replace the warning function at run-time. | ||
212 | */ | ||
213 | void PNGAPI | ||
214 | png_warning(png_structp png_ptr, png_const_charp warning_message) | ||
215 | { | ||
216 | int offset = 0; | ||
217 | if (png_ptr != NULL) | ||
218 | { | ||
219 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED | ||
220 | if (png_ptr->flags& | ||
221 | (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) | ||
222 | #endif | ||
223 | { | ||
224 | if (*warning_message == PNG_LITERAL_SHARP) | ||
225 | { | ||
226 | for (offset = 1; offset < 15; offset++) | ||
227 | if (warning_message[offset] == ' ') | ||
228 | break; | ||
229 | } | ||
230 | } | ||
231 | } | ||
232 | if (png_ptr != NULL && png_ptr->warning_fn != NULL) | ||
233 | (*(png_ptr->warning_fn))(png_ptr, warning_message + offset); | ||
234 | else | ||
235 | png_default_warning(png_ptr, warning_message + offset); | ||
236 | } | ||
237 | |||
238 | /* These functions support 'formatted' warning messages with up to | ||
239 | * PNG_WARNING_PARAMETER_COUNT parameters. In the format string the parameter | ||
240 | * is introduced by @<number>, where 'number' starts at 1. This follows the | ||
241 | * standard established by X/Open for internationalizable error messages. | ||
242 | */ | ||
243 | void | ||
244 | png_warning_parameter(png_warning_parameters p, int number, | ||
245 | png_const_charp string) | ||
246 | { | ||
247 | if (number > 0 && number <= PNG_WARNING_PARAMETER_COUNT) | ||
248 | (void)png_safecat(p[number-1], (sizeof p[number-1]), 0, string); | ||
249 | } | ||
250 | |||
251 | void | ||
252 | png_warning_parameter_unsigned(png_warning_parameters p, int number, int format, | ||
253 | png_alloc_size_t value) | ||
254 | { | ||
255 | char buffer[PNG_NUMBER_BUFFER_SIZE]; | ||
256 | png_warning_parameter(p, number, PNG_FORMAT_NUMBER(buffer, format, value)); | ||
257 | } | ||
258 | |||
259 | void | ||
260 | png_warning_parameter_signed(png_warning_parameters p, int number, int format, | ||
261 | png_int_32 value) | ||
262 | { | ||
263 | png_alloc_size_t u; | ||
264 | png_charp str; | ||
265 | char buffer[PNG_NUMBER_BUFFER_SIZE]; | ||
266 | |||
267 | /* Avoid overflow by doing the negate in a png_alloc_size_t: */ | ||
268 | u = (png_alloc_size_t)value; | ||
269 | if (value < 0) | ||
270 | u = ~u + 1; | ||
271 | |||
272 | str = PNG_FORMAT_NUMBER(buffer, format, u); | ||
273 | |||
274 | if (value < 0 && str > buffer) | ||
275 | *--str = '-'; | ||
276 | |||
277 | png_warning_parameter(p, number, str); | ||
278 | } | ||
279 | |||
280 | void | ||
281 | png_formatted_warning(png_structp png_ptr, png_warning_parameters p, | ||
282 | png_const_charp message) | ||
283 | { | ||
284 | /* The internal buffer is just 192 bytes - enough for all our messages, | ||
285 | * overflow doesn't happen because this code checks! If someone figures | ||
286 | * out how to send us a message longer than 192 bytes, all that will | ||
287 | * happen is that the message will be truncated appropriately. | ||
288 | */ | ||
289 | size_t i = 0; /* Index in the msg[] buffer: */ | ||
290 | char msg[192]; | ||
291 | |||
292 | /* Each iteration through the following loop writes at most one character | ||
293 | * to msg[i++] then returns here to validate that there is still space for | ||
294 | * the trailing '\0'. It may (in the case of a parameter) read more than | ||
295 | * one character from message[]; it must check for '\0' and continue to the | ||
296 | * test if it finds the end of string. | ||
297 | */ | ||
298 | while (i<(sizeof msg)-1 && *message != '\0') | ||
299 | { | ||
300 | /* '@' at end of string is now just printed (previously it was skipped); | ||
301 | * it is an error in the calling code to terminate the string with @. | ||
302 | */ | ||
303 | if (p != NULL && *message == '@' && message[1] != '\0') | ||
304 | { | ||
305 | int parameter_char = *++message; /* Consume the '@' */ | ||
306 | static const char valid_parameters[] = "123456789"; | ||
307 | int parameter = 0; | ||
308 | |||
309 | /* Search for the parameter digit, the index in the string is the | ||
310 | * parameter to use. | ||
311 | */ | ||
312 | while (valid_parameters[parameter] != parameter_char && | ||
313 | valid_parameters[parameter] != '\0') | ||
314 | ++parameter; | ||
315 | |||
316 | /* If the parameter digit is out of range it will just get printed. */ | ||
317 | if (parameter < PNG_WARNING_PARAMETER_COUNT) | ||
318 | { | ||
319 | /* Append this parameter */ | ||
320 | png_const_charp parm = p[parameter]; | ||
321 | png_const_charp pend = p[parameter] + (sizeof p[parameter]); | ||
322 | |||
323 | /* No need to copy the trailing '\0' here, but there is no guarantee | ||
324 | * that parm[] has been initialized, so there is no guarantee of a | ||
325 | * trailing '\0': | ||
326 | */ | ||
327 | while (i<(sizeof msg)-1 && *parm != '\0' && parm < pend) | ||
328 | msg[i++] = *parm++; | ||
329 | |||
330 | /* Consume the parameter digit too: */ | ||
331 | ++message; | ||
332 | continue; | ||
333 | } | ||
334 | |||
335 | /* else not a parameter and there is a character after the @ sign; just | ||
336 | * copy that. This is known not to be '\0' because of the test above. | ||
337 | */ | ||
338 | } | ||
339 | |||
340 | /* At this point *message can't be '\0', even in the bad parameter case | ||
341 | * above where there is a lone '@' at the end of the message string. | ||
342 | */ | ||
343 | msg[i++] = *message++; | ||
344 | } | ||
345 | |||
346 | /* i is always less than (sizeof msg), so: */ | ||
347 | msg[i] = '\0'; | ||
348 | |||
349 | /* And this is the formatted message, it may be larger than | ||
350 | * PNG_MAX_ERROR_TEXT, but that is only used for 'chunk' errors and these are | ||
351 | * not (currently) formatted. | ||
352 | */ | ||
353 | png_warning(png_ptr, msg); | ||
354 | } | ||
355 | #endif /* PNG_WARNINGS_SUPPORTED */ | ||
356 | |||
357 | #ifdef PNG_BENIGN_ERRORS_SUPPORTED | ||
358 | void PNGAPI | ||
359 | png_benign_error(png_structp png_ptr, png_const_charp error_message) | ||
360 | { | ||
361 | if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) | ||
362 | png_warning(png_ptr, error_message); | ||
363 | else | ||
364 | png_error(png_ptr, error_message); | ||
365 | } | ||
366 | #endif | ||
367 | |||
368 | /* These utilities are used internally to build an error message that relates | ||
369 | * to the current chunk. The chunk name comes from png_ptr->chunk_name, | ||
370 | * this is used to prefix the message. The message is limited in length | ||
371 | * to 63 bytes, the name characters are output as hex digits wrapped in [] | ||
372 | * if the character is invalid. | ||
373 | */ | ||
374 | #define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97)) | ||
375 | static PNG_CONST char png_digit[16] = { | ||
376 | '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', | ||
377 | 'A', 'B', 'C', 'D', 'E', 'F' | ||
378 | }; | ||
379 | |||
380 | #define PNG_MAX_ERROR_TEXT 64 | ||
381 | #if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED) | ||
382 | static void /* PRIVATE */ | ||
383 | png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp | ||
384 | error_message) | ||
385 | { | ||
386 | png_uint_32 chunk_name = png_ptr->chunk_name; | ||
387 | int iout = 0, ishift = 24; | ||
388 | |||
389 | while (ishift >= 0) | ||
390 | { | ||
391 | int c = (int)(chunk_name >> ishift) & 0xff; | ||
392 | |||
393 | ishift -= 8; | ||
394 | if (isnonalpha(c)) | ||
395 | { | ||
396 | buffer[iout++] = PNG_LITERAL_LEFT_SQUARE_BRACKET; | ||
397 | buffer[iout++] = png_digit[(c & 0xf0) >> 4]; | ||
398 | buffer[iout++] = png_digit[c & 0x0f]; | ||
399 | buffer[iout++] = PNG_LITERAL_RIGHT_SQUARE_BRACKET; | ||
400 | } | ||
401 | |||
402 | else | ||
403 | { | ||
404 | buffer[iout++] = (char)c; | ||
405 | } | ||
406 | } | ||
407 | |||
408 | if (error_message == NULL) | ||
409 | buffer[iout] = '\0'; | ||
410 | |||
411 | else | ||
412 | { | ||
413 | int iin = 0; | ||
414 | |||
415 | buffer[iout++] = ':'; | ||
416 | buffer[iout++] = ' '; | ||
417 | |||
418 | while (iin < PNG_MAX_ERROR_TEXT-1 && error_message[iin] != '\0') | ||
419 | buffer[iout++] = error_message[iin++]; | ||
420 | |||
421 | /* iin < PNG_MAX_ERROR_TEXT, so the following is safe: */ | ||
422 | buffer[iout] = '\0'; | ||
423 | } | ||
424 | } | ||
425 | #endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */ | ||
426 | |||
427 | #if defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED) | ||
428 | PNG_FUNCTION(void,PNGAPI | ||
429 | png_chunk_error,(png_structp png_ptr, png_const_charp error_message), | ||
430 | PNG_NORETURN) | ||
431 | { | ||
432 | char msg[18+PNG_MAX_ERROR_TEXT]; | ||
433 | if (png_ptr == NULL) | ||
434 | png_error(png_ptr, error_message); | ||
435 | |||
436 | else | ||
437 | { | ||
438 | png_format_buffer(png_ptr, msg, error_message); | ||
439 | png_error(png_ptr, msg); | ||
440 | } | ||
441 | } | ||
442 | #endif /* PNG_READ_SUPPORTED && PNG_ERROR_TEXT_SUPPORTED */ | ||
443 | |||
444 | #ifdef PNG_WARNINGS_SUPPORTED | ||
445 | void PNGAPI | ||
446 | png_chunk_warning(png_structp png_ptr, png_const_charp warning_message) | ||
447 | { | ||
448 | char msg[18+PNG_MAX_ERROR_TEXT]; | ||
449 | if (png_ptr == NULL) | ||
450 | png_warning(png_ptr, warning_message); | ||
451 | |||
452 | else | ||
453 | { | ||
454 | png_format_buffer(png_ptr, msg, warning_message); | ||
455 | png_warning(png_ptr, msg); | ||
456 | } | ||
457 | } | ||
458 | #endif /* PNG_WARNINGS_SUPPORTED */ | ||
459 | |||
460 | #ifdef PNG_READ_SUPPORTED | ||
461 | #ifdef PNG_BENIGN_ERRORS_SUPPORTED | ||
462 | void PNGAPI | ||
463 | png_chunk_benign_error(png_structp png_ptr, png_const_charp error_message) | ||
464 | { | ||
465 | if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) | ||
466 | png_chunk_warning(png_ptr, error_message); | ||
467 | |||
468 | else | ||
469 | png_chunk_error(png_ptr, error_message); | ||
470 | } | ||
471 | #endif | ||
472 | #endif /* PNG_READ_SUPPORTED */ | ||
473 | |||
474 | #ifdef PNG_ERROR_TEXT_SUPPORTED | ||
475 | #ifdef PNG_FLOATING_POINT_SUPPORTED | ||
476 | PNG_FUNCTION(void, | ||
477 | png_fixed_error,(png_structp png_ptr, png_const_charp name),PNG_NORETURN) | ||
478 | { | ||
479 | # define fixed_message "fixed point overflow in " | ||
480 | # define fixed_message_ln ((sizeof fixed_message)-1) | ||
481 | int iin; | ||
482 | char msg[fixed_message_ln+PNG_MAX_ERROR_TEXT]; | ||
483 | png_memcpy(msg, fixed_message, fixed_message_ln); | ||
484 | iin = 0; | ||
485 | if (name != NULL) while (iin < (PNG_MAX_ERROR_TEXT-1) && name[iin] != 0) | ||
486 | { | ||
487 | msg[fixed_message_ln + iin] = name[iin]; | ||
488 | ++iin; | ||
489 | } | ||
490 | msg[fixed_message_ln + iin] = 0; | ||
491 | png_error(png_ptr, msg); | ||
492 | } | ||
493 | #endif | ||
494 | #endif | ||
495 | |||
496 | #ifdef PNG_SETJMP_SUPPORTED | ||
497 | /* This API only exists if ANSI-C style error handling is used, | ||
498 | * otherwise it is necessary for png_default_error to be overridden. | ||
499 | */ | ||
500 | jmp_buf* PNGAPI | ||
501 | png_set_longjmp_fn(png_structp png_ptr, png_longjmp_ptr longjmp_fn, | ||
502 | size_t jmp_buf_size) | ||
503 | { | ||
504 | if (png_ptr == NULL || jmp_buf_size != png_sizeof(jmp_buf)) | ||
505 | return NULL; | ||
506 | |||
507 | png_ptr->longjmp_fn = longjmp_fn; | ||
508 | return &png_ptr->longjmp_buffer; | ||
509 | } | ||
510 | #endif | ||
511 | |||
512 | /* This is the default error handling function. Note that replacements for | ||
513 | * this function MUST NOT RETURN, or the program will likely crash. This | ||
514 | * function is used by default, or if the program supplies NULL for the | ||
515 | * error function pointer in png_set_error_fn(). | ||
516 | */ | ||
517 | static PNG_FUNCTION(void /* PRIVATE */, | ||
518 | png_default_error,(png_structp png_ptr, png_const_charp error_message), | ||
519 | PNG_NORETURN) | ||
520 | { | ||
521 | #ifdef PNG_CONSOLE_IO_SUPPORTED | ||
522 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED | ||
523 | /* Check on NULL only added in 1.5.4 */ | ||
524 | if (error_message != NULL && *error_message == PNG_LITERAL_SHARP) | ||
525 | { | ||
526 | /* Strip "#nnnn " from beginning of error message. */ | ||
527 | int offset; | ||
528 | char error_number[16]; | ||
529 | for (offset = 0; offset<15; offset++) | ||
530 | { | ||
531 | error_number[offset] = error_message[offset + 1]; | ||
532 | if (error_message[offset] == ' ') | ||
533 | break; | ||
534 | } | ||
535 | |||
536 | if ((offset > 1) && (offset < 15)) | ||
537 | { | ||
538 | error_number[offset - 1] = '\0'; | ||
539 | fprintf(stderr, "libpng error no. %s: %s", | ||
540 | error_number, error_message + offset + 1); | ||
541 | fprintf(stderr, PNG_STRING_NEWLINE); | ||
542 | } | ||
543 | |||
544 | else | ||
545 | { | ||
546 | fprintf(stderr, "libpng error: %s, offset=%d", | ||
547 | error_message, offset); | ||
548 | fprintf(stderr, PNG_STRING_NEWLINE); | ||
549 | } | ||
550 | } | ||
551 | else | ||
552 | #endif | ||
553 | { | ||
554 | fprintf(stderr, "libpng error: %s", error_message ? error_message : | ||
555 | "undefined"); | ||
556 | fprintf(stderr, PNG_STRING_NEWLINE); | ||
557 | } | ||
558 | #else | ||
559 | PNG_UNUSED(error_message) /* Make compiler happy */ | ||
560 | #endif | ||
561 | png_longjmp(png_ptr, 1); | ||
562 | } | ||
563 | |||
564 | PNG_FUNCTION(void,PNGAPI | ||
565 | png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN) | ||
566 | { | ||
567 | #ifdef PNG_SETJMP_SUPPORTED | ||
568 | if (png_ptr && png_ptr->longjmp_fn) | ||
569 | { | ||
570 | # ifdef USE_FAR_KEYWORD | ||
571 | { | ||
572 | jmp_buf tmp_jmpbuf; | ||
573 | png_memcpy(tmp_jmpbuf, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); | ||
574 | png_ptr->longjmp_fn(tmp_jmpbuf, val); | ||
575 | } | ||
576 | |||
577 | # else | ||
578 | png_ptr->longjmp_fn(png_ptr->longjmp_buffer, val); | ||
579 | # endif | ||
580 | } | ||
581 | #endif | ||
582 | /* Here if not setjmp support or if png_ptr is null. */ | ||
583 | PNG_ABORT(); | ||
584 | } | ||
585 | |||
586 | #ifdef PNG_WARNINGS_SUPPORTED | ||
587 | /* This function is called when there is a warning, but the library thinks | ||
588 | * it can continue anyway. Replacement functions don't have to do anything | ||
589 | * here if you don't want them to. In the default configuration, png_ptr is | ||
590 | * not used, but it is passed in case it may be useful. | ||
591 | */ | ||
592 | static void /* PRIVATE */ | ||
593 | png_default_warning(png_structp png_ptr, png_const_charp warning_message) | ||
594 | { | ||
595 | #ifdef PNG_CONSOLE_IO_SUPPORTED | ||
596 | # ifdef PNG_ERROR_NUMBERS_SUPPORTED | ||
597 | if (*warning_message == PNG_LITERAL_SHARP) | ||
598 | { | ||
599 | int offset; | ||
600 | char warning_number[16]; | ||
601 | for (offset = 0; offset < 15; offset++) | ||
602 | { | ||
603 | warning_number[offset] = warning_message[offset + 1]; | ||
604 | if (warning_message[offset] == ' ') | ||
605 | break; | ||
606 | } | ||
607 | |||
608 | if ((offset > 1) && (offset < 15)) | ||
609 | { | ||
610 | warning_number[offset + 1] = '\0'; | ||
611 | fprintf(stderr, "libpng warning no. %s: %s", | ||
612 | warning_number, warning_message + offset); | ||
613 | fprintf(stderr, PNG_STRING_NEWLINE); | ||
614 | } | ||
615 | |||
616 | else | ||
617 | { | ||
618 | fprintf(stderr, "libpng warning: %s", | ||
619 | warning_message); | ||
620 | fprintf(stderr, PNG_STRING_NEWLINE); | ||
621 | } | ||
622 | } | ||
623 | else | ||
624 | # endif | ||
625 | |||
626 | { | ||
627 | fprintf(stderr, "libpng warning: %s", warning_message); | ||
628 | fprintf(stderr, PNG_STRING_NEWLINE); | ||
629 | } | ||
630 | #else | ||
631 | PNG_UNUSED(warning_message) /* Make compiler happy */ | ||
632 | #endif | ||
633 | PNG_UNUSED(png_ptr) /* Make compiler happy */ | ||
634 | } | ||
635 | #endif /* PNG_WARNINGS_SUPPORTED */ | ||
636 | |||
637 | /* This function is called when the application wants to use another method | ||
638 | * of handling errors and warnings. Note that the error function MUST NOT | ||
639 | * return to the calling routine or serious problems will occur. The return | ||
640 | * method used in the default routine calls longjmp(png_ptr->longjmp_buffer, 1) | ||
641 | */ | ||
642 | void PNGAPI | ||
643 | png_set_error_fn(png_structp png_ptr, png_voidp error_ptr, | ||
644 | png_error_ptr error_fn, png_error_ptr warning_fn) | ||
645 | { | ||
646 | if (png_ptr == NULL) | ||
647 | return; | ||
648 | |||
649 | png_ptr->error_ptr = error_ptr; | ||
650 | png_ptr->error_fn = error_fn; | ||
651 | #ifdef PNG_WARNINGS_SUPPORTED | ||
652 | png_ptr->warning_fn = warning_fn; | ||
653 | #else | ||
654 | PNG_UNUSED(warning_fn) | ||
655 | #endif | ||
656 | } | ||
657 | |||
658 | |||
659 | /* This function returns a pointer to the error_ptr associated with the user | ||
660 | * functions. The application should free any memory associated with this | ||
661 | * pointer before png_write_destroy and png_read_destroy are called. | ||
662 | */ | ||
663 | png_voidp PNGAPI | ||
664 | png_get_error_ptr(png_const_structp png_ptr) | ||
665 | { | ||
666 | if (png_ptr == NULL) | ||
667 | return NULL; | ||
668 | |||
669 | return ((png_voidp)png_ptr->error_ptr); | ||
670 | } | ||
671 | |||
672 | |||
673 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED | ||
674 | void PNGAPI | ||
675 | png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode) | ||
676 | { | ||
677 | if (png_ptr != NULL) | ||
678 | { | ||
679 | png_ptr->flags &= | ||
680 | ((~(PNG_FLAG_STRIP_ERROR_NUMBERS | | ||
681 | PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode); | ||
682 | } | ||
683 | } | ||
684 | #endif | ||
685 | #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ | ||