1 /* exif-entry.c
2 *
3 * Copyright (c) 2001 Lutz Mueller <lutz@users.sourceforge.net>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301 USA.
19 *
20 * SPDX-License-Identifier: LGPL-2.0-or-later
21 */
22
23 #include <config.h>
24
25 #include <libexif/exif-entry.h>
26 #include <libexif/exif-ifd.h>
27 #include <libexif/exif-utils.h>
28 #include <libexif/i18n.h>
29
30 #include <libexif/exif-gps-ifd.h>
31
32 #include <ctype.h>
33 #include <stdlib.h>
34 #include <stdio.h>
35 #include <string.h>
36 #include <time.h>
37 #include <math.h>
38
39 #ifndef M_PI
40 #define M_PI 3.14159265358979323846
41 #endif
42 #define HW_FOCUS_MODE_EXIF_MAX_LEN 6
43
44 struct _ExifEntryPrivate
45 {
46 unsigned int ref_count;
47
48 ExifMem *mem;
49 };
50
51 /* This function is hidden in exif-data.c */
52 ExifLog *exif_data_get_log (ExifData *);
53
54 #ifndef NO_VERBOSE_TAG_STRINGS
55 static void
exif_entry_log(ExifEntry * e,ExifLogCode code,const char * format,...)56 exif_entry_log (ExifEntry *e, ExifLogCode code, const char *format, ...)
57 {
58 va_list args;
59 ExifLog *l = NULL;
60
61 if (e && e->parent && e->parent->parent)
62 l = exif_data_get_log (e->parent->parent);
63 va_start (args, format);
64 exif_logv (l, code, "ExifEntry", format, args);
65 va_end (args);
66 }
67 #else
68 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
69 #define exif_entry_log(...) do { } while (0)
70 #elif defined(__GNUC__)
71 #define exif_entry_log(x...) do { } while (0)
72 #else
73 #define exif_entry_log (void)
74 #endif
75 #endif
76
77 static void *
exif_entry_alloc(ExifEntry * e,unsigned int i)78 exif_entry_alloc (ExifEntry *e, unsigned int i)
79 {
80 void *d;
81 ExifLog *l = NULL;
82
83 if (!e || !e->priv || !i) return NULL;
84
85 d = exif_mem_alloc (e->priv->mem, i);
86 if (d) return d;
87
88 if (e->parent && e->parent->parent)
89 l = exif_data_get_log (e->parent->parent);
90 EXIF_LOG_NO_MEMORY (l, "ExifEntry", i);
91 return NULL;
92 }
93
94 static void *
exif_entry_realloc(ExifEntry * e,void * d_orig,unsigned int i)95 exif_entry_realloc (ExifEntry *e, void *d_orig, unsigned int i)
96 {
97 void *d;
98 ExifLog *l = NULL;
99
100 if (!e || !e->priv) return NULL;
101
102 if (!i) { exif_mem_free (e->priv->mem, d_orig); return NULL; }
103
104 d = exif_mem_realloc (e->priv->mem, d_orig, i);
105 if (d) return d;
106
107 if (e->parent && e->parent->parent)
108 l = exif_data_get_log (e->parent->parent);
109 EXIF_LOG_NO_MEMORY (l, "ExifEntry", i);
110 return NULL;
111 }
112
113 ExifEntry *
exif_entry_new(void)114 exif_entry_new (void)
115 {
116 ExifMem *mem = exif_mem_new_default ();
117 ExifEntry *e = exif_entry_new_mem (mem);
118
119 exif_mem_unref (mem);
120
121 return e;
122 }
123
124 ExifEntry *
exif_entry_new_mem(ExifMem * mem)125 exif_entry_new_mem (ExifMem *mem)
126 {
127 ExifEntry *e = NULL;
128
129 e = exif_mem_alloc (mem, sizeof (ExifEntry));
130 if (!e) return NULL;
131 e->priv = exif_mem_alloc (mem, sizeof (ExifEntryPrivate));
132 if (!e->priv) { exif_mem_free (mem, e); return NULL; }
133 e->priv->ref_count = 1;
134
135 e->priv->mem = mem;
136 exif_mem_ref (mem);
137
138 return e;
139 }
140
141 void
exif_entry_ref(ExifEntry * e)142 exif_entry_ref (ExifEntry *e)
143 {
144 if (!e) return;
145
146 e->priv->ref_count++;
147 }
148
149 void
exif_entry_unref(ExifEntry * e)150 exif_entry_unref (ExifEntry *e)
151 {
152 if (!e || !e->priv) return;
153
154 e->priv->ref_count--;
155 if (!e->priv->ref_count)
156 exif_entry_free (e);
157 }
158
159 void
exif_entry_free(ExifEntry * e)160 exif_entry_free (ExifEntry *e)
161 {
162 if (!e) return;
163
164 if (e->priv) {
165 ExifMem *mem = e->priv->mem;
166 if (e->data)
167 exif_mem_free (mem, e->data);
168 exif_mem_free (mem, e->priv);
169 exif_mem_free (mem, e);
170 exif_mem_unref (mem);
171 }
172 }
173
174 static void
clear_entry(ExifEntry * e)175 clear_entry (ExifEntry *e)
176 {
177 e->components = 0;
178 e->size = 0;
179 }
180
181 static int
count_decimal(double num)182 count_decimal(double num)
183 {
184 char str[50];
185 sprintf(str, "%.10f", num);
186 int len = strlen(str);
187 int decimalPlaces = 0;
188 // Start counting from the decimal point
189 int i = len - 1;
190 while (str[i] != '.') {
191 if (str[i] != '0') { // Skip trailing zeros
192 break;
193 }
194 i--;
195 }
196 // Count actual decimal places
197 while (str[i] != '.' && i >= 0) {
198 decimalPlaces++;
199 i--;
200 }
201 return decimalPlaces;
202 }
203
204 static uint32_t
gcd_uint32_t(uint32_t a,uint32_t b)205 gcd_uint32_t(uint32_t a, uint32_t b)
206 {
207 if (b == 0) {
208 return a;
209 }
210 return gcd_uint32_t(b, a % b);
211 }
212
213 /*! Get a value and convert it to an ExifShort.
214 * \bug Not all types are converted that could be converted and no indication
215 * is made when that occurs
216 */
217 static inline ExifShort
exif_get_short_convert(const unsigned char * buf,ExifFormat format,ExifByteOrder order)218 exif_get_short_convert (const unsigned char *buf, ExifFormat format,
219 ExifByteOrder order)
220 {
221 switch (format) {
222 case EXIF_FORMAT_LONG:
223 return (ExifShort) exif_get_long (buf, order);
224 case EXIF_FORMAT_SLONG:
225 return (ExifShort) exif_get_slong (buf, order);
226 case EXIF_FORMAT_SHORT:
227 return (ExifShort) exif_get_short (buf, order);
228 case EXIF_FORMAT_SSHORT:
229 return (ExifShort) exif_get_sshort (buf, order);
230 case EXIF_FORMAT_BYTE:
231 case EXIF_FORMAT_SBYTE:
232 return (ExifShort) buf[0];
233 default:
234 /* Unsupported type */
235 return (ExifShort) 0;
236 }
237 }
238
239 void
exif_entry_fix(ExifEntry * e)240 exif_entry_fix (ExifEntry *e)
241 {
242 unsigned int i, newsize;
243 unsigned char *newdata;
244 ExifByteOrder o;
245 ExifRational r;
246 ExifSRational sr;
247
248 if (!e || !e->priv) return;
249
250 switch (e->tag) {
251
252 /* These tags all need to be of format SHORT. */
253 case EXIF_TAG_YCBCR_SUB_SAMPLING:
254 case EXIF_TAG_SUBJECT_AREA:
255 case EXIF_TAG_COLOR_SPACE:
256 case EXIF_TAG_PLANAR_CONFIGURATION:
257 case EXIF_TAG_SENSING_METHOD:
258 case EXIF_TAG_ORIENTATION:
259 case EXIF_TAG_YCBCR_POSITIONING:
260 case EXIF_TAG_PHOTOMETRIC_INTERPRETATION:
261 case EXIF_TAG_CUSTOM_RENDERED:
262 case EXIF_TAG_EXPOSURE_MODE:
263 case EXIF_TAG_WHITE_BALANCE:
264 case EXIF_TAG_SCENE_CAPTURE_TYPE:
265 case EXIF_TAG_GAIN_CONTROL:
266 case EXIF_TAG_SATURATION:
267 case EXIF_TAG_CONTRAST:
268 case EXIF_TAG_SHARPNESS:
269 case EXIF_TAG_ISO_SPEED_RATINGS:
270 switch (e->format) {
271 case EXIF_FORMAT_LONG:
272 case EXIF_FORMAT_SLONG:
273 case EXIF_FORMAT_BYTE:
274 case EXIF_FORMAT_SBYTE:
275 case EXIF_FORMAT_SSHORT:
276 if (!e->parent || !e->parent->parent) break;
277 exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
278 _("Tag '%s' was of format '%s' (which is "
279 "against specification) and has been "
280 "changed to format '%s'."),
281 exif_tag_get_name_in_ifd(e->tag,
282 exif_entry_get_ifd(e)),
283 exif_format_get_name (e->format),
284 exif_format_get_name (EXIF_FORMAT_SHORT));
285
286 o = exif_data_get_byte_order (e->parent->parent);
287 newsize = e->components * exif_format_get_size (EXIF_FORMAT_SHORT);
288 newdata = exif_entry_alloc (e, newsize);
289 if (!newdata) {
290 exif_entry_log (e, EXIF_LOG_CODE_NO_MEMORY,
291 "Could not allocate %lu byte(s).", (unsigned long)newsize);
292 break;
293 }
294
295 for (i = 0; i < e->components; i++)
296 exif_set_short (
297 newdata + i *
298 exif_format_get_size (
299 EXIF_FORMAT_SHORT), o,
300 exif_get_short_convert (
301 e->data + i *
302 exif_format_get_size (e->format),
303 e->format, o));
304
305 exif_mem_free (e->priv->mem, e->data);
306 e->data = newdata;
307 e->size = newsize;
308 e->format = EXIF_FORMAT_SHORT;
309 break;
310 case EXIF_FORMAT_SHORT:
311 /* No conversion necessary */
312 break;
313 default:
314 exif_entry_log (e, EXIF_LOG_CODE_CORRUPT_DATA,
315 _("Tag '%s' is of format '%s' (which is "
316 "against specification) but cannot be changed "
317 "to format '%s'."),
318 exif_tag_get_name_in_ifd(e->tag,
319 exif_entry_get_ifd(e)),
320 exif_format_get_name (e->format),
321 exif_format_get_name (EXIF_FORMAT_SHORT));
322 break;
323 }
324 break;
325
326 /* All these tags need to be of format 'Rational'. */
327 case EXIF_TAG_FNUMBER:
328 case EXIF_TAG_APERTURE_VALUE:
329 case EXIF_TAG_EXPOSURE_TIME:
330 case EXIF_TAG_FOCAL_LENGTH:
331 switch (e->format) {
332 case EXIF_FORMAT_SRATIONAL:
333 if (!e->parent || !e->parent->parent) break;
334 o = exif_data_get_byte_order (e->parent->parent);
335 for (i = 0; i < e->components; i++) {
336 sr = exif_get_srational (e->data + i *
337 exif_format_get_size (
338 EXIF_FORMAT_SRATIONAL), o);
339 r.numerator = (ExifLong) sr.numerator;
340 r.denominator = (ExifLong) sr.denominator;
341 exif_set_rational (e->data + i *
342 exif_format_get_size (
343 EXIF_FORMAT_RATIONAL), o, r);
344 }
345 e->format = EXIF_FORMAT_RATIONAL;
346 exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
347 _("Tag '%s' was of format '%s' (which is "
348 "against specification) and has been "
349 "changed to format '%s'."),
350 exif_tag_get_name_in_ifd(e->tag,
351 exif_entry_get_ifd(e)),
352 exif_format_get_name (EXIF_FORMAT_SRATIONAL),
353 exif_format_get_name (EXIF_FORMAT_RATIONAL));
354 break;
355 default:
356 break;
357 }
358 break;
359
360 /* All these tags need to be of format 'SRational'. */
361 case EXIF_TAG_EXPOSURE_BIAS_VALUE:
362 case EXIF_TAG_BRIGHTNESS_VALUE:
363 case EXIF_TAG_SHUTTER_SPEED_VALUE:
364 switch (e->format) {
365 case EXIF_FORMAT_RATIONAL:
366 if (!e->parent || !e->parent->parent) break;
367 o = exif_data_get_byte_order (e->parent->parent);
368 for (i = 0; i < e->components; i++) {
369 r = exif_get_rational (e->data + i *
370 exif_format_get_size (
371 EXIF_FORMAT_RATIONAL), o);
372 sr.numerator = (ExifLong) r.numerator;
373 sr.denominator = (ExifLong) r.denominator;
374 exif_set_srational (e->data + i *
375 exif_format_get_size (
376 EXIF_FORMAT_SRATIONAL), o, sr);
377 }
378 e->format = EXIF_FORMAT_SRATIONAL;
379 exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
380 _("Tag '%s' was of format '%s' (which is "
381 "against specification) and has been "
382 "changed to format '%s'."),
383 exif_tag_get_name_in_ifd(e->tag,
384 exif_entry_get_ifd(e)),
385 exif_format_get_name (EXIF_FORMAT_RATIONAL),
386 exif_format_get_name (EXIF_FORMAT_SRATIONAL));
387 break;
388 default:
389 break;
390 }
391 break;
392
393 case EXIF_TAG_USER_COMMENT:
394 /* Format needs to be UNDEFINED. */
395 if (e->format != EXIF_FORMAT_UNDEFINED) {
396 exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
397 _("Tag 'UserComment' had invalid format '%s'. "
398 "Format has been set to 'undefined'."),
399 exif_format_get_name (e->format));
400 e->format = EXIF_FORMAT_UNDEFINED;
401 }
402
403 /* Some packages like Canon ZoomBrowser EX 4.5 store
404 only one zero byte followed by 7 bytes of rubbish */
405 if ((e->size >= 8) && (e->data[0] == 0)) {
406 memcpy(e->data, "\0\0\0\0\0\0\0\0", 8);
407 }
408
409 /* There need to be at least 8 bytes. */
410 if (e->size < 8) {
411 e->data = exif_entry_realloc (e, e->data, 8 + e->size);
412 if (!e->data) {
413 clear_entry(e);
414 return;
415 }
416
417 /* Assume ASCII */
418 memmove (e->data + 8, e->data, e->size);
419 memcpy (e->data, "ASCII\0\0\0", 8);
420 e->size += 8;
421 e->components += 8;
422 exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
423 _("Tag 'UserComment' has been expanded to at "
424 "least 8 bytes in order to follow the "
425 "specification."));
426 break;
427 }
428
429 /*
430 * If the first 8 bytes are empty and real data starts
431 * afterwards, let's assume ASCII and claim the 8 first
432 * bytes for the format specifyer.
433 */
434 for (i = 0; (i < e->size) && !e->data[i]; i++);
435 if (!i) for ( ; (i < e->size) && (e->data[i] == ' '); i++);
436 if ((i >= 8) && (i < e->size)) {
437 exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
438 _("Tag 'UserComment' is not empty but does not "
439 "start with a format identifier. "
440 "This has been fixed."));
441 memcpy (e->data, "ASCII\0\0\0", 8);
442 break;
443 }
444
445 /*
446 * First 8 bytes need to follow the specification. If they don't,
447 * assume ASCII.
448 */
449 if (memcmp (e->data, "ASCII\0\0\0" , 8) &&
450 memcmp (e->data, "UNICODE\0" , 8) &&
451 memcmp (e->data, "JIS\0\0\0\0\0" , 8) &&
452 memcmp (e->data, "\0\0\0\0\0\0\0\0", 8)) {
453 e->data = exif_entry_realloc (e, e->data, 8 + e->size);
454 if (!e->data) {
455 clear_entry(e);
456 break;
457 }
458
459 /* Assume ASCII */
460 memmove (e->data + 8, e->data, e->size);
461 memcpy (e->data, "ASCII\0\0\0", 8);
462 e->size += 8;
463 e->components += 8;
464 exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
465 _("Tag 'UserComment' did not start with a "
466 "format identifier. This has been fixed."));
467 break;
468 }
469
470 break;
471 default:
472 break;
473 }
474 }
475
476 /*! Format the value of an ExifEntry for human display in a generic way.
477 * The output is localized. The formatting is independent of the tag number
478 * and is based entirely on the data type.
479 * \pre The ExifEntry is already a member of an ExifData.
480 * \param[in] e EXIF entry
481 * \param[out] val buffer in which to store value
482 * \param[in] maxlen the length of the buffer val
483 */
484 static void
exif_entry_format_value(ExifEntry * e,char * val,size_t maxlen)485 exif_entry_format_value(ExifEntry *e, char *val, size_t maxlen)
486 {
487 ExifByte v_byte;
488 ExifShort v_short;
489 ExifSShort v_sshort;
490 ExifLong v_long;
491 ExifRational v_rat;
492 ExifSRational v_srat;
493 ExifSLong v_slong;
494 unsigned int i;
495 size_t len;
496 const ExifByteOrder o = exif_data_get_byte_order (e->parent->parent);
497
498 if (!e->size || !maxlen)
499 return;
500 switch (e->format) {
501 case EXIF_FORMAT_UNDEFINED:
502 snprintf (val, maxlen, _("%i bytes undefined data"), e->size);
503 break;
504 case EXIF_FORMAT_BYTE:
505 case EXIF_FORMAT_SBYTE:
506 v_byte = e->data[0];
507 snprintf (val, maxlen, "0x%02x", v_byte);
508 len = strlen (val);
509 for (i = 1; i < e->components; i++) {
510 v_byte = e->data[i];
511 snprintf (val+len, maxlen-len, ", 0x%02x", v_byte);
512 len += strlen (val+len);
513 if (len >= maxlen-1) break;
514 }
515 break;
516 case EXIF_FORMAT_SHORT:
517 v_short = exif_get_short (e->data, o);
518 snprintf (val, maxlen, "%u", v_short);
519 len = strlen (val);
520 for (i = 1; i < e->components; i++) {
521 v_short = exif_get_short (e->data +
522 exif_format_get_size (e->format) * i, o);
523 snprintf (val+len, maxlen-len, ", %u", v_short);
524 len += strlen (val+len);
525 if (len >= maxlen-1) break;
526 }
527 break;
528 case EXIF_FORMAT_SSHORT:
529 v_sshort = exif_get_sshort (e->data, o);
530 snprintf (val, maxlen, "%i", v_sshort);
531 len = strlen (val);
532 for (i = 1; i < e->components; i++) {
533 v_sshort = exif_get_short (e->data +
534 exif_format_get_size (e->format) *
535 i, o);
536 snprintf (val+len, maxlen-len, ", %i", v_sshort);
537 len += strlen (val+len);
538 if (len >= maxlen-1) break;
539 }
540 break;
541 case EXIF_FORMAT_LONG:
542 v_long = exif_get_long (e->data, o);
543 snprintf (val, maxlen, "%lu", (unsigned long) v_long);
544 len = strlen (val);
545 for (i = 1; i < e->components; i++) {
546 v_long = exif_get_long (e->data +
547 exif_format_get_size (e->format) *
548 i, o);
549 snprintf (val+len, maxlen-len, ", %lu", (unsigned long) v_long);
550 len += strlen (val+len);
551 if (len >= maxlen-1) break;
552 }
553 break;
554 case EXIF_FORMAT_SLONG:
555 v_slong = exif_get_slong (e->data, o);
556 snprintf (val, maxlen, "%li", (long) v_slong);
557 len = strlen (val);
558 for (i = 1; i < e->components; i++) {
559 v_slong = exif_get_slong (e->data +
560 exif_format_get_size (e->format) * i, o);
561 snprintf (val+len, maxlen-len, ", %li", (long) v_slong);
562 len += strlen (val+len);
563 if (len >= maxlen-1) break;
564 }
565 break;
566 case EXIF_FORMAT_ASCII:
567 strncpy (val, (char *) e->data, MIN (maxlen-1, e->size));
568 val[MIN (maxlen-1, e->size)] = 0;
569 break;
570 case EXIF_FORMAT_RATIONAL:
571 len = 0;
572 for (i = 0; i < e->components; i++) {
573 if (i > 0) {
574 snprintf (val+len, maxlen-len, ", ");
575 len += strlen (val+len);
576 }
577 v_rat = exif_get_rational (
578 e->data + 8 * i, o);
579 if (v_rat.denominator) {
580 /*
581 * Choose the number of significant digits to
582 * display based on the size of the denominator.
583 * It is scaled so that denominators within the
584 * range 13..120 will show 2 decimal points.
585 */
586 int decimals = (int)(log10(v_rat.denominator)-0.08+1.0);
587 snprintf (val+len, maxlen-len, "%2.*f",
588 decimals,
589 (double) v_rat.numerator /
590 (double) v_rat.denominator);
591 } else
592 snprintf (val+len, maxlen-len, "%lu/%lu",
593 (unsigned long) v_rat.numerator,
594 (unsigned long) v_rat.denominator);
595 len += strlen (val+len);
596 if (len >= maxlen-1) break;
597 }
598 break;
599 case EXIF_FORMAT_SRATIONAL:
600 len = 0;
601 for (i = 0; i < e->components; i++) {
602 if (i > 0) {
603 snprintf (val+len, maxlen-len, ", ");
604 len += strlen (val+len);
605 }
606 v_srat = exif_get_srational (
607 e->data + 8 * i, o);
608 if (v_srat.denominator && v_srat.denominator > INT32_MIN) {
609 int decimals = (int)(log10(abs(v_srat.denominator))-0.08+1.0);
610 snprintf (val+len, maxlen-len, "%2.*f",
611 decimals,
612 (double) v_srat.numerator /
613 (double) v_srat.denominator);
614 } else
615 snprintf (val+len, maxlen-len, "%li/%li",
616 (long) v_srat.numerator,
617 (long) v_srat.denominator);
618 len += strlen (val+len);
619 if (len >= maxlen-1) break;
620 }
621 break;
622 case EXIF_FORMAT_DOUBLE:
623 case EXIF_FORMAT_FLOAT:
624 default:
625 snprintf (val, maxlen, _("%i bytes unsupported data type"),
626 e->size);
627 break;
628 }
629 }
630
631 void
exif_entry_dump(ExifEntry * e,unsigned int indent)632 exif_entry_dump (ExifEntry *e, unsigned int indent)
633 {
634 char buf[1024];
635 char value[1024];
636 unsigned int l;
637
638 if (!e)
639 return;
640
641 l = MIN(sizeof(buf)-1, 2*indent);
642 memset(buf, ' ', l);
643 buf[l] = '\0';
644
645 printf ("%sTag: 0x%x ('%s')\n", buf, e->tag,
646 exif_tag_get_name_in_ifd (e->tag, exif_entry_get_ifd(e)));
647 printf ("%s Format: %i ('%s')\n", buf, e->format,
648 exif_format_get_name (e->format));
649 printf ("%s Components: %i\n", buf, (int) e->components);
650 printf ("%s Offset: %lu\n", buf, e->offset);
651 printf ("%s Size: %u\n", buf, e->size);
652 printf ("%s Value: %s\n", buf, exif_entry_get_value (e, value, sizeof(value)));
653 }
654
655 /*! Check if a string consists entirely of a single, repeated character.
656 * Up to first n bytes are checked.
657 *
658 * \param[in] data pointer of string to check
659 * \param[in] ch character to match
660 * \param[in] n maximum number of characters to match
661 *
662 * \return 0 if the string matches or is of zero length, nonzero otherwise
663 */
664 static int
match_repeated_char(const unsigned char * data,unsigned char ch,size_t n)665 match_repeated_char(const unsigned char *data, unsigned char ch, size_t n)
666 {
667 int i;
668 for (i=n; i; --i, ++data) {
669 if (*data == 0) {
670 i = 0; /* all bytes before NUL matched */
671 break;
672 }
673 if (*data != ch)
674 break;
675 }
676 return i;
677 }
678
679 #define CF(entry,target,v,maxlen) \
680 { \
681 if (entry->format != target) { \
682 exif_entry_log (entry, EXIF_LOG_CODE_CORRUPT_DATA, \
683 _("The tag '%s' contains data of an invalid " \
684 "format ('%s', expected '%s')."), \
685 exif_tag_get_name (entry->tag), \
686 exif_format_get_name (entry->format), \
687 exif_format_get_name (target)); \
688 break; \
689 } \
690 }
691
692 #define CC(entry,target,v,maxlen) \
693 { \
694 if (entry->components != target) { \
695 exif_entry_log (entry, EXIF_LOG_CODE_CORRUPT_DATA, \
696 _("The tag '%s' contains an invalid number of " \
697 "components (%i, expected %i)."), \
698 exif_tag_get_name (entry->tag), \
699 (int) entry->components, (int) target); \
700 break; \
701 } \
702 }
703
704 static const struct {
705 ExifTag tag;
706 const char *strings[10];
707 } list[] = {
708 #ifndef NO_VERBOSE_TAG_DATA
709 { EXIF_TAG_PLANAR_CONFIGURATION,
710 { "", N_("Chunky format"), N_("Planar format"), NULL}},
711 { EXIF_TAG_SENSING_METHOD,
712 { "", N_("Not defined"), N_("One-chip color area sensor"),
713 N_("Two-chip color area sensor"), N_("Three-chip color area sensor"),
714 N_("Color sequential area sensor"), "", N_("Trilinear sensor"),
715 N_("Color sequential linear sensor"), NULL}},
716 { EXIF_TAG_ORIENTATION,
717 { "", N_("Top-left"), N_("Top-right"), N_("Bottom-right"),
718 N_("Bottom-left"), N_("Left-top"), N_("Right-top"),
719 N_("Right-bottom"), N_("Left-bottom"), NULL}},
720 { EXIF_TAG_YCBCR_POSITIONING,
721 { "", N_("Centered"), N_("Co-sited"), NULL}},
722 { EXIF_TAG_PHOTOMETRIC_INTERPRETATION,
723 { N_("Reversed mono"), N_("Normal mono"), N_("RGB"), N_("Palette"), "",
724 N_("CMYK"), N_("YCbCr"), "", N_("CieLAB"), NULL}},
725 { EXIF_TAG_CUSTOM_RENDERED,
726 { N_("Normal process"), N_("Custom process"), NULL}},
727 { EXIF_TAG_EXPOSURE_MODE,
728 { N_("Auto exposure"), N_("Manual exposure"), N_("Auto bracket"), NULL}},
729 { EXIF_TAG_WHITE_BALANCE,
730 { N_("Auto white balance"), N_("Manual white balance"), NULL}},
731 { EXIF_TAG_SCENE_CAPTURE_TYPE,
732 { N_("Standard"), N_("Landscape"), N_("Portrait"),
733 N_("Night scene"), NULL}},
734 { EXIF_TAG_GAIN_CONTROL,
735 { N_("Normal"), N_("Low gain up"), N_("High gain up"),
736 N_("Low gain down"), N_("High gain down"), NULL}},
737 { EXIF_TAG_SATURATION,
738 { N_("Normal"), N_("Low saturation"), N_("High saturation"), NULL}},
739 { EXIF_TAG_CONTRAST , {N_("Normal"), N_("Soft"), N_("Hard"), NULL}},
740 { EXIF_TAG_SHARPNESS, {N_("Normal"), N_("Soft"), N_("Hard"), NULL}},
741 #endif
742 { 0, {NULL}}
743 };
744
745 static const struct {
746 ExifTag tag;
747 struct {
748 ExifShort index;
749 const char *values[4]; /*!< list of progressively shorter string
750 descriptions; the longest one that fits will be
751 selected */
752 } elem[25];
753 } list2[] = {
754 #ifndef NO_VERBOSE_TAG_DATA
755 { EXIF_TAG_METERING_MODE,
756 { { 0, {N_("Unknown"), NULL}},
757 { 1, {N_("Average"), N_("Avg"), NULL}},
758 { 2, {N_("Center-weighted average"), N_("Center-weight"), NULL}},
759 { 3, {N_("Spot"), NULL}},
760 { 4, {N_("Multi spot"), NULL}},
761 { 5, {N_("Pattern"), NULL}},
762 { 6, {N_("Partial"), NULL}},
763 {255, {N_("Other"), NULL}},
764 { 0, {NULL}}}},
765 { EXIF_TAG_COMPRESSION,
766 { {1, {N_("Uncompressed"), NULL}},
767 {5, {N_("LZW compression"), NULL}},
768 {6, {N_("JPEG compression"), NULL}},
769 {7, {N_("JPEG compression"), NULL}},
770 {8, {N_("Deflate/ZIP compression"), NULL}},
771 {32773, {N_("PackBits compression"), NULL}},
772 {0, {NULL}}}},
773 { EXIF_TAG_LIGHT_SOURCE,
774 { { 0, {N_("Unknown"), NULL}},
775 { 1, {N_("Daylight"), NULL}},
776 { 2, {N_("Fluorescent"), NULL}},
777 { 3, {N_("Tungsten incandescent light"), N_("Tungsten"), NULL}},
778 { 4, {N_("Flash"), NULL}},
779 { 9, {N_("Fine weather"), NULL}},
780 { 10, {N_("Cloudy weather"), N_("Cloudy"), NULL}},
781 { 11, {N_("Shade"), NULL}},
782 { 12, {N_("Daylight fluorescent"), NULL}},
783 { 13, {N_("Day white fluorescent"), NULL}},
784 { 14, {N_("Cool white fluorescent"), NULL}},
785 { 15, {N_("White fluorescent"), NULL}},
786 { 17, {N_("Standard light A"), NULL}},
787 { 18, {N_("Standard light B"), NULL}},
788 { 19, {N_("Standard light C"), NULL}},
789 { 20, {N_("D55"), NULL}},
790 { 21, {N_("D65"), NULL}},
791 { 22, {N_("D75"), NULL}},
792 { 24, {N_("ISO studio tungsten"),NULL}},
793 {255, {N_("Other"), NULL}},
794 { 0, {NULL}}}},
795 { EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT,
796 { {2, {N_("Inch"), N_("in"), NULL}},
797 {3, {N_("Centimeter"), N_("cm"), NULL}},
798 {0, {NULL}}}},
799 { EXIF_TAG_RESOLUTION_UNIT,
800 { {2, {N_("Inch"), N_("in"), NULL}},
801 {3, {N_("Centimeter"), N_("cm"), NULL}},
802 {0, {NULL}}}},
803 { EXIF_TAG_EXPOSURE_PROGRAM,
804 { {0, {N_("Not defined"), NULL}},
805 {1, {N_("Manual"), NULL}},
806 {2, {N_("Normal program"), N_("Normal"), NULL}},
807 {3, {N_("Aperture priority"), N_("Aperture"), NULL}},
808 {4, {N_("Shutter priority"),N_("Shutter"), NULL}},
809 {5, {N_("Creative program (biased toward depth of field)"),
810 N_("Creative"), NULL}},
811 {6, {N_("Creative program (biased toward fast shutter speed)"),
812 N_("Action"), NULL}},
813 {7, {N_("Portrait mode (for closeup photos with the background out "
814 "of focus)"), N_("Portrait"), NULL}},
815 {8, {N_("Landscape mode (for landscape photos with the background "
816 "in focus)"), N_("Landscape"), NULL}},
817 {0, {NULL}}}},
818 { EXIF_TAG_SENSITIVITY_TYPE,
819 { {0, {N_("Unknown"), NULL}},
820 {1, {N_("Standard output sensitivity (SOS)"), NULL}},
821 {2, {N_("Recommended exposure index (REI)"), NULL}},
822 {3, {N_("ISO speed"), NULL}},
823 {4, {N_("Standard output sensitivity (SOS) and recommended exposure index (REI)"), NULL}},
824 {5, {N_("Standard output sensitivity (SOS) and ISO speed"), NULL}},
825 {6, {N_("Recommended exposure index (REI) and ISO speed"), NULL}},
826 {7, {N_("Standard output sensitivity (SOS) and recommended exposure index (REI) and ISO speed"), NULL}},
827 {0, {NULL}}}},
828 { EXIF_TAG_FLASH,
829 { {0x0000, {N_("Flash did not fire"), N_("No flash"), NULL}},
830 {0x0001, {N_("Flash fired"), N_("Flash"), N_("Yes"), NULL}},
831 {0x0005, {N_("Strobe return light not detected"), N_("Without strobe"),
832 NULL}},
833 {0x0007, {N_("Strobe return light detected"), N_("With strobe"), NULL}},
834 {0x0008, {N_("Flash did not fire"), NULL}}, /* Olympus E-330 */
835 {0x0009, {N_("Flash fired, compulsory flash mode"), NULL}},
836 {0x000d, {N_("Flash fired, compulsory flash mode, return light "
837 "not detected"), NULL}},
838 {0x000f, {N_("Flash fired, compulsory flash mode, return light "
839 "detected"), NULL}},
840 {0x0010, {N_("Flash did not fire, compulsory flash mode"), NULL}},
841 {0x0018, {N_("Flash did not fire, auto mode"), NULL}},
842 {0x0019, {N_("Flash fired, auto mode"), NULL}},
843 {0x001d, {N_("Flash fired, auto mode, return light not detected"),
844 NULL}},
845 {0x001f, {N_("Flash fired, auto mode, return light detected"), NULL}},
846 {0x0020, {N_("No flash function"),NULL}},
847 {0x0041, {N_("Flash fired, red-eye reduction mode"), NULL}},
848 {0x0045, {N_("Flash fired, red-eye reduction mode, return light "
849 "not detected"), NULL}},
850 {0x0047, {N_("Flash fired, red-eye reduction mode, return light "
851 "detected"), NULL}},
852 {0x0049, {N_("Flash fired, compulsory flash mode, red-eye reduction "
853 "mode"), NULL}},
854 {0x004d, {N_("Flash fired, compulsory flash mode, red-eye reduction "
855 "mode, return light not detected"), NULL}},
856 {0x004f, {N_("Flash fired, compulsory flash mode, red-eye reduction mode, "
857 "return light detected"), NULL}},
858 {0x0058, {N_("Flash did not fire, auto mode, red-eye reduction mode"), NULL}},
859 {0x0059, {N_("Flash fired, auto mode, red-eye reduction mode"), NULL}},
860 {0x005d, {N_("Flash fired, auto mode, return light not detected, "
861 "red-eye reduction mode"), NULL}},
862 {0x005f, {N_("Flash fired, auto mode, return light detected, "
863 "red-eye reduction mode"), NULL}},
864 {0x0000, {NULL}}}},
865 { EXIF_TAG_SUBJECT_DISTANCE_RANGE,
866 { {0, {N_("Unknown"), N_("?"), NULL}},
867 {1, {N_("Macro"), NULL}},
868 {2, {N_("Close view"), N_("Close"), NULL}},
869 {3, {N_("Distant view"), N_("Distant"), NULL}},
870 {0, {NULL}}}},
871 { EXIF_TAG_COLOR_SPACE,
872 { {1, {N_("sRGB"), NULL}},
873 {2, {N_("Adobe RGB"), NULL}},
874 {0xffff, {N_("Uncalibrated"), NULL}},
875 {0x0000, {NULL}}}},
876 { EXIF_TAG_COMPOSITE_IMAGE,
877 { {0, {N_("Unknown"), NULL}},
878 {1, {N_("Not a composite image"), NULL}},
879 {2, {N_("General composite image"), NULL}},
880 {3, {N_("Composite image captured while shooting"), NULL}},
881 {0, {NULL}}}},
882 #endif
883 {0, { { 0, {NULL}}} }
884 };
885
886 const char *
exif_entry_get_value(ExifEntry * e,char * val,unsigned int maxlen)887 exif_entry_get_value (ExifEntry *e, char *val, unsigned int maxlen)
888 {
889 unsigned int i, j, k;
890 ExifShort v_short, v_short2, v_short3, v_short4;
891 ExifByte v_byte;
892 ExifRational v_rat;
893 ExifSRational v_srat;
894 char b[64];
895 const char *c;
896 ExifByteOrder o;
897 double d;
898 ExifEntry *entry;
899 static const struct {
900 char label[5];
901 char major, minor;
902 } versions[] = {
903 {"0110", 1, 1},
904 {"0120", 1, 2},
905 {"0200", 2, 0},
906 {"0210", 2, 1},
907 {"0220", 2, 2},
908 {"0221", 2, 21},
909 {"0230", 2, 3},
910 {"0231", 2, 31},
911 {"0232", 2, 32},
912 {"" , 0, 0}
913 };
914
915 (void) bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
916
917 if (!e || !e->parent || !e->parent->parent || !maxlen || !val)
918 return val;
919
920 /* make sure the returned string is zero terminated */
921 /* FIXME: this is inefficient in the case of long buffers and should
922 * instead be taken care of on each write instead. */
923 memset (val, 0, maxlen);
924
925 /* We need the byte order */
926 o = exif_data_get_byte_order (e->parent->parent);
927
928 /* Sanity check */
929 if (e->size != e->components * exif_format_get_size (e->format)) {
930 snprintf (val, maxlen, _("Invalid size of entry (%i, "
931 "expected %li x %i)."), e->size, e->components,
932 exif_format_get_size (e->format));
933 return val;
934 }
935
936 switch (e->tag) {
937 case EXIF_TAG_USER_COMMENT:
938 case EXIF_TAG_SPATIAL_FREQUENCY_RESPONSE:
939 case EXIF_TAG_DEVICE_SETTING_DESCRIPTION:
940 case EXIF_TAG_GPS_PROCESSING_METHOD:
941 case EXIF_TAG_GPS_AREA_INFORMATION:
942 case EXIF_TAG_SOURCE_EXPOSURE_TIMES_OF_COMPOSITE_IMAGE:
943 /*
944 * The specification says UNDEFINED, but some
945 * manufacturers don't care and use ASCII. If this is the
946 * case here, only refuse to read it if there is no chance
947 * of finding readable data.
948 */
949 if ((e->format != EXIF_FORMAT_ASCII) ||
950 (e->size <= 8) ||
951 ( memcmp (e->data, "ASCII\0\0\0" , 8) &&
952 memcmp (e->data, "UNICODE\0" , 8) &&
953 memcmp (e->data, "JIS\0\0\0\0\0", 8) &&
954 memcmp (e->data, "\0\0\0\0\0\0\0\0", 8)))
955 CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen)
956
957 /*
958 * Note that, according to the specification (V2.1, p 40),
959 * the user comment field does not have to be
960 * NULL terminated.
961 */
962 if ((e->size >= 8) && !memcmp (e->data, "ASCII\0\0\0", 8)) {
963 strncpy (val, (char *) e->data + 8, MIN (e->size - 8, maxlen-1));
964 break;
965 }
966 if ((e->size >= 8) && !memcmp (e->data, "UNICODE\0", 8)) {
967 strncpy (val, _("Unsupported UNICODE string"), maxlen-1);
968 /* FIXME: use iconv to convert into the locale encoding.
969 * EXIF 2.2 implies (but does not say) that this encoding is
970 * UCS-2.
971 */
972 break;
973 }
974 if ((e->size >= 8) && !memcmp (e->data, "JIS\0\0\0\0\0", 8)) {
975 strncpy (val, _("Unsupported JIS string"), maxlen-1);
976 /* FIXME: use iconv to convert into the locale encoding */
977 break;
978 }
979
980 /* Check if there is really some information in the tag. */
981 for (i = 0; (i < e->size) &&
982 (!e->data[i] || (e->data[i] == ' ')); i++);
983 if (i == e->size) break;
984
985 /*
986 * If we reach this point, the tag does not
987 * comply with the standard but seems to contain data.
988 * Print as much as possible.
989 * Note: make sure we do not overwrite the final \0 at maxlen-1
990 */
991 exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
992 _("Tag UserComment contains data but is "
993 "against specification."));
994 for (j = 0; (i < e->size) && (j < maxlen-1); i++, j++) {
995 exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
996 _("Byte at position %i: 0x%02x"), i, e->data[i]);
997 val[j] = isprint (e->data[i]) ? e->data[i] : '.';
998 }
999 break;
1000
1001 case EXIF_TAG_EXIF_VERSION:
1002 CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen)
1003 CC (e, 4, val, maxlen)
1004 strncpy (val, _("Unknown Exif Version"), maxlen-1);
1005 for (i = 0; *versions[i].label; i++) {
1006 if (!memcmp (e->data, versions[i].label, 4)) {
1007 snprintf (val, maxlen,
1008 _("Exif Version %d.%d"),
1009 versions[i].major,
1010 versions[i].minor);
1011 break;
1012 }
1013 }
1014 break;
1015 case EXIF_TAG_FLASH_PIX_VERSION:
1016 CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen)
1017 CC (e, 4, val, maxlen)
1018 if (!memcmp (e->data, "0100", 4))
1019 strncpy (val, _("FlashPix Version 1.0"), maxlen-1);
1020 else if (!memcmp (e->data, "0101", 4))
1021 strncpy (val, _("FlashPix Version 1.01"), maxlen-1);
1022 else
1023 strncpy (val, _("Unknown FlashPix Version"), maxlen-1);
1024 break;
1025 case EXIF_TAG_COPYRIGHT:
1026 CF (e, EXIF_FORMAT_ASCII, val, maxlen)
1027
1028 /*
1029 * First part: Photographer.
1030 * Some cameras store a string like " " here. Ignore it.
1031 * Remember that a corrupted tag might not be NUL-terminated
1032 */
1033 if (e->size && e->data && match_repeated_char(e->data, ' ', e->size))
1034 strncpy (val, (char *) e->data, MIN (maxlen-1, e->size));
1035 else
1036 strncpy (val, _("[None]"), maxlen-1);
1037 strncat (val, " ", maxlen-1 - strlen (val));
1038 strncat (val, _("(Photographer)"), maxlen-1 - strlen (val));
1039
1040 /* Second part: Editor. */
1041 strncat (val, " - ", maxlen-1 - strlen (val));
1042 k = 0;
1043 if (e->size && e->data) {
1044 const unsigned char *tagdata = memchr(e->data, 0, e->size);
1045 if (tagdata++) {
1046 unsigned int editor_ofs = tagdata - e->data;
1047 unsigned int remaining = e->size - editor_ofs;
1048 if (match_repeated_char(tagdata, ' ', remaining)) {
1049 strncat (val, (const char*)tagdata, MIN (maxlen-1 - strlen (val), remaining));
1050 ++k;
1051 }
1052 }
1053 }
1054 if (!k)
1055 strncat (val, _("[None]"), maxlen-1 - strlen (val));
1056 strncat (val, " ", maxlen-1 - strlen (val));
1057 strncat (val, _("(Editor)"), maxlen-1 - strlen (val));
1058
1059 break;
1060 case EXIF_TAG_FNUMBER:
1061 CF (e, EXIF_FORMAT_RATIONAL, val, maxlen)
1062 CC (e, 1, val, maxlen)
1063 v_rat = exif_get_rational (e->data, o);
1064 if (!v_rat.denominator) {
1065 exif_entry_format_value(e, val, maxlen);
1066 break;
1067 }
1068 d = (double) v_rat.numerator / (double) v_rat.denominator;
1069 snprintf (val, maxlen, "f/%.01f", d);
1070 break;
1071 case EXIF_TAG_APERTURE_VALUE:
1072 case EXIF_TAG_MAX_APERTURE_VALUE:
1073 CF (e, EXIF_FORMAT_RATIONAL, val, maxlen)
1074 CC (e, 1, val, maxlen)
1075 v_rat = exif_get_rational (e->data, o);
1076 if (!v_rat.denominator || (0x80000000 == v_rat.numerator)) {
1077 exif_entry_format_value(e, val, maxlen);
1078 break;
1079 }
1080 d = (double) v_rat.numerator / (double) v_rat.denominator;
1081 snprintf (val, maxlen, _("%.02f EV"), d);
1082 snprintf (b, sizeof (b), _(" (f/%.01f)"), pow (2, d / 2.));
1083 strncat (val, b, maxlen-1 - strlen (val));
1084 break;
1085 case EXIF_TAG_FOCAL_LENGTH:
1086 CF (e, EXIF_FORMAT_RATIONAL, val, maxlen)
1087 CC (e, 1, val, maxlen)
1088 v_rat = exif_get_rational (e->data, o);
1089 if (!v_rat.denominator) {
1090 exif_entry_format_value(e, val, maxlen);
1091 break;
1092 }
1093
1094 /*
1095 * For calculation of the 35mm equivalent,
1096 * Minolta cameras need a multiplier that depends on the
1097 * camera model.
1098 */
1099 d = 0.;
1100 entry = exif_content_get_entry (
1101 e->parent->parent->ifd[EXIF_IFD_0], EXIF_TAG_MAKE);
1102 if (entry && entry->data && entry->size >= 7 &&
1103 !strncmp ((char *)entry->data, "Minolta", 7)) {
1104 entry = exif_content_get_entry (
1105 e->parent->parent->ifd[EXIF_IFD_0],
1106 EXIF_TAG_MODEL);
1107 if (entry && entry->data && entry->size >= 8) {
1108 if (!strncmp ((char *)entry->data, "DiMAGE 7", 8))
1109 d = 3.9;
1110 else if (!strncmp ((char *)entry->data, "DiMAGE 5", 8))
1111 d = 4.9;
1112 }
1113 }
1114 if (d)
1115 snprintf (b, sizeof (b), _(" (35 equivalent: %.0f mm)"),
1116 (d * (double) v_rat.numerator /
1117 (double) v_rat.denominator));
1118 else
1119 b[0] = 0;
1120
1121 d = (double) v_rat.numerator / (double) v_rat.denominator;
1122 snprintf (val, maxlen, "%.1f mm", d);
1123 strncat (val, b, maxlen-1 - strlen (val));
1124 break;
1125 case EXIF_TAG_SUBJECT_DISTANCE:
1126 CF (e, EXIF_FORMAT_RATIONAL, val, maxlen)
1127 CC (e, 1, val, maxlen)
1128 v_rat = exif_get_rational (e->data, o);
1129 if (!v_rat.denominator) {
1130 exif_entry_format_value(e, val, maxlen);
1131 break;
1132 }
1133 d = (double) v_rat.numerator / (double) v_rat.denominator;
1134 snprintf (val, maxlen, "%.1f m", d);
1135 break;
1136 case EXIF_TAG_EXPOSURE_TIME:
1137 CF (e, EXIF_FORMAT_RATIONAL, val, maxlen)
1138 CC (e, 1, val, maxlen)
1139 v_rat = exif_get_rational (e->data, o);
1140 if (!v_rat.denominator) {
1141 exif_entry_format_value(e, val, maxlen);
1142 break;
1143 }
1144 d = (double) v_rat.numerator / (double) v_rat.denominator;
1145 unsigned int g = gcd_uint32_t(v_rat.numerator, v_rat.denominator);
1146 unsigned int min_numerator = v_rat.numerator / g;
1147 unsigned int min_denominator = v_rat.denominator / g;
1148 if (d < 1 && d) {
1149 int cd = count_decimal(d);
1150 if (min_numerator == 1) {
1151 if (min_denominator == 2) {
1152 snprintf (val, maxlen, _("%.1f"), d);
1153 } else {
1154 snprintf (val, maxlen, _("%d/%d"), min_numerator, min_denominator);
1155 }
1156 } else if (cd <= 1) {
1157 snprintf (val, maxlen, _("%.1f"), d);
1158 } else {
1159 snprintf (val, maxlen, _("1/%.0f"), 1. / d);
1160 }
1161 } else {
1162 if (min_denominator == 1) {
1163 snprintf (val, maxlen, "%.0f", d);
1164 } else {
1165 snprintf (val, maxlen, "%.1f", d);
1166 }
1167 }
1168 strncat (val, _(" sec."), maxlen-1 - strlen (val));
1169 break;
1170 case EXIF_TAG_SHUTTER_SPEED_VALUE:
1171 CF (e, EXIF_FORMAT_SRATIONAL, val, maxlen)
1172 CC (e, 1, val, maxlen)
1173 v_srat = exif_get_srational (e->data, o);
1174 if (!v_srat.denominator) {
1175 exif_entry_format_value(e, val, maxlen);
1176 break;
1177 }
1178 d = (double) v_srat.numerator / (double) v_srat.denominator;
1179 snprintf (val, maxlen, _("%.02f EV"), d);
1180 if (pow (2, d))
1181 d = 1. / pow (2, d);
1182 if (d < 1 && d)
1183 snprintf (b, sizeof (b), _(" (1/%.0f sec.)"), 1. / d);
1184 else
1185 snprintf (b, sizeof (b), _(" (%.0f sec.)"), d);
1186 strncat (val, b, maxlen-1 - strlen (val));
1187 break;
1188 case EXIF_TAG_BRIGHTNESS_VALUE:
1189 CF (e, EXIF_FORMAT_SRATIONAL, val, maxlen)
1190 CC (e, 1, val, maxlen)
1191 v_srat = exif_get_srational (e->data, o);
1192 if (!v_srat.denominator) {
1193 exif_entry_format_value(e, val, maxlen);
1194 break;
1195 }
1196 d = (double) v_srat.numerator / (double) v_srat.denominator;
1197 snprintf (val, maxlen, _("%.02f EV"), d);
1198 snprintf (b, sizeof (b), _(" (%.02f cd/m^2)"),
1199 1. / (M_PI * 0.3048 * 0.3048) * pow (2, d));
1200 strncat (val, b, maxlen-1 - strlen (val));
1201 break;
1202 case EXIF_TAG_FILE_SOURCE:
1203 CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen)
1204 CC (e, 1, val, maxlen)
1205 v_byte = e->data[0];
1206 if (v_byte == 3)
1207 strncpy (val, _("DSC"), maxlen-1);
1208 else
1209 snprintf (val, maxlen, _("Internal error (unknown "
1210 "value %i)"), v_byte);
1211 break;
1212 case EXIF_TAG_COMPONENTS_CONFIGURATION:
1213 CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen)
1214 CC (e, 4, val, maxlen)
1215 for (i = 0; i < 4; i++) {
1216 switch (e->data[i]) {
1217 case 0: c = _("-"); break;
1218 case 1: c = _("Y"); break;
1219 case 2: c = _("Cb"); break;
1220 case 3: c = _("Cr"); break;
1221 case 4: c = _("R"); break;
1222 case 5: c = _("G"); break;
1223 case 6: c = _("B"); break;
1224 default: c = _("Reserved"); break;
1225 }
1226 strncat (val, c, maxlen-1 - strlen (val));
1227 if (i < 3)
1228 strncat (val, " ", maxlen-1 - strlen (val));
1229 }
1230 break;
1231 case EXIF_TAG_EXPOSURE_BIAS_VALUE:
1232 CF (e, EXIF_FORMAT_SRATIONAL, val, maxlen)
1233 CC (e, 1, val, maxlen)
1234 v_srat = exif_get_srational (e->data, o);
1235 if (!v_srat.denominator) {
1236 exif_entry_format_value(e, val, maxlen);
1237 break;
1238 }
1239 d = (double) v_srat.numerator / (double) v_srat.denominator;
1240 snprintf (val, maxlen, _("%.02f EV"), d);
1241 break;
1242 case EXIF_TAG_SCENE_TYPE:
1243 CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen)
1244 CC (e, 1, val, maxlen)
1245 v_byte = e->data[0];
1246 if (v_byte == 1)
1247 strncpy (val, _("Directly photographed"), maxlen-1);
1248 else
1249 snprintf (val, maxlen, _("Internal error (unknown "
1250 "value %i)"), v_byte);
1251 break;
1252 case EXIF_TAG_YCBCR_SUB_SAMPLING:
1253 CF (e, EXIF_FORMAT_SHORT, val, maxlen)
1254 CC (e, 2, val, maxlen)
1255 v_short = exif_get_short (e->data, o);
1256 v_short2 = exif_get_short (
1257 e->data + exif_format_get_size (e->format),
1258 o);
1259 if ((v_short == 2) && (v_short2 == 1))
1260 strncpy (val, _("YCbCr4:2:2"), maxlen-1);
1261 else if ((v_short == 2) && (v_short2 == 2))
1262 strncpy (val, _("YCbCr4:2:0"), maxlen-1);
1263 else
1264 snprintf (val, maxlen, "%u, %u", v_short, v_short2);
1265 break;
1266 case EXIF_TAG_SUBJECT_AREA:
1267 CF (e, EXIF_FORMAT_SHORT, val, maxlen)
1268 switch (e->components) {
1269 case 2:
1270 v_short = exif_get_short (e->data, o);
1271 v_short2 = exif_get_short (e->data + 2, o);
1272 snprintf (val, maxlen, "(x,y) = (%i,%i)",
1273 v_short, v_short2);
1274 break;
1275 case 3:
1276 v_short = exif_get_short (e->data, o);
1277 v_short2 = exif_get_short (e->data + 2, o);
1278 v_short3 = exif_get_short (e->data + 4, o);
1279 snprintf (val, maxlen, _("Within distance %i of "
1280 "(x,y) = (%i,%i)"), v_short3, v_short,
1281 v_short2);
1282 break;
1283 case 4:
1284 v_short = exif_get_short (e->data, o);
1285 v_short2 = exif_get_short (e->data + 2, o);
1286 v_short3 = exif_get_short (e->data + 4, o);
1287 v_short4 = exif_get_short (e->data + 6, o);
1288 snprintf (val, maxlen, _("Within rectangle "
1289 "(width %i, height %i) around "
1290 "(x,y) = (%i,%i)"), v_short3, v_short4,
1291 v_short, v_short2);
1292 break;
1293 default:
1294 snprintf (val, maxlen, _("Unexpected number "
1295 "of components (%li, expected 2, 3, or 4)."),
1296 e->components);
1297 }
1298 break;
1299 case EXIF_TAG_GPS_VERSION_ID:
1300 /* This is only valid in the GPS IFD */
1301 CF (e, EXIF_FORMAT_BYTE, val, maxlen)
1302 CC (e, 4, val, maxlen)
1303 v_byte = e->data[0];
1304 snprintf (val, maxlen, "%u", v_byte);
1305 for (i = 1; i < e->components; i++) {
1306 v_byte = e->data[i];
1307 snprintf (b, sizeof (b), ".%u", v_byte);
1308 strncat (val, b, maxlen-1 - strlen (val));
1309 }
1310 break;
1311 case EXIF_TAG_INTEROPERABILITY_VERSION:
1312 /* a.k.a. case EXIF_TAG_GPS_LATITUDE: */
1313 /* This tag occurs in EXIF_IFD_INTEROPERABILITY */
1314 if (e->format == EXIF_FORMAT_UNDEFINED) {
1315 strncpy (val, (char *) e->data, MIN (maxlen-1, e->size));
1316 break;
1317 }
1318 /* EXIF_TAG_GPS_LATITUDE is the same numerically as
1319 * EXIF_TAG_INTEROPERABILITY_VERSION but in EXIF_IFD_GPS
1320 */
1321 exif_entry_format_value(e, val, maxlen);
1322 break;
1323 case EXIF_TAG_GPS_ALTITUDE_REF:
1324 /* This is only valid in the GPS IFD */
1325 CF (e, EXIF_FORMAT_BYTE, val, maxlen)
1326 CC (e, 1, val, maxlen)
1327 v_byte = e->data[0];
1328 if (v_byte == 0)
1329 strncpy (val, _("Sea level"), maxlen-1);
1330 else if (v_byte == 1)
1331 strncpy (val, _("Sea level reference"), maxlen-1);
1332 else
1333 snprintf (val, maxlen, _("Internal error (unknown "
1334 "value %i)"), v_byte);
1335 break;
1336 case EXIF_TAG_GPS_TIME_STAMP:
1337 /* This is only valid in the GPS IFD */
1338 CF (e, EXIF_FORMAT_RATIONAL, val, maxlen)
1339 CC (e, 3, val, maxlen)
1340
1341 v_rat = exif_get_rational (e->data, o);
1342 if (!v_rat.denominator) {
1343 exif_entry_format_value(e, val, maxlen);
1344 break;
1345 }
1346 i = v_rat.numerator / v_rat.denominator;
1347
1348 v_rat = exif_get_rational (e->data +
1349 exif_format_get_size (e->format),
1350 o);
1351 if (!v_rat.denominator) {
1352 exif_entry_format_value(e, val, maxlen);
1353 break;
1354 }
1355 j = v_rat.numerator / v_rat.denominator;
1356
1357 v_rat = exif_get_rational (e->data +
1358 2*exif_format_get_size (e->format),
1359 o);
1360 if (!v_rat.denominator) {
1361 exif_entry_format_value(e, val, maxlen);
1362 break;
1363 }
1364 d = (double) v_rat.numerator / (double) v_rat.denominator;
1365 snprintf (val, maxlen, "%02u:%02u:%05.2f", i, j, d);
1366 break;
1367
1368 case EXIF_TAG_METERING_MODE:
1369 case EXIF_TAG_COMPRESSION:
1370 case EXIF_TAG_LIGHT_SOURCE:
1371 case EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT:
1372 case EXIF_TAG_RESOLUTION_UNIT:
1373 case EXIF_TAG_EXPOSURE_PROGRAM:
1374 case EXIF_TAG_SENSITIVITY_TYPE:
1375 case EXIF_TAG_FLASH:
1376 case EXIF_TAG_SUBJECT_DISTANCE_RANGE:
1377 case EXIF_TAG_COLOR_SPACE:
1378 /* libexif v0.6.25 support, cause xts failed
1379 case EXIF_TAG_COMPOSITE_IMAGE:
1380 */
1381 CF (e,EXIF_FORMAT_SHORT, val, maxlen)
1382 CC (e, 1, val, maxlen)
1383 v_short = exif_get_short (e->data, o);
1384
1385 /* Search the tag */
1386 for (i = 0; list2[i].tag && (list2[i].tag != e->tag); i++);
1387 if (!list2[i].tag) {
1388 snprintf (val, maxlen, _("Internal error (unknown "
1389 "value %i)"), v_short);
1390 break;
1391 }
1392
1393 /* Find the value */
1394 for (j = 0; list2[i].elem[j].values[0] &&
1395 (list2[i].elem[j].index < v_short); j++);
1396 if (list2[i].elem[j].index != v_short) {
1397 snprintf (val, maxlen, _("Internal error (unknown "
1398 "value %i)"), v_short);
1399 break;
1400 }
1401
1402 /* Find a short enough value */
1403 memset (val, 0, maxlen);
1404 for (k = 0; list2[i].elem[j].values[k]; k++) {
1405 size_t l = strlen (_(list2[i].elem[j].values[k]));
1406 if ((maxlen > l) && (strlen (val) < l))
1407 strncpy (val, _(list2[i].elem[j].values[k]), maxlen-1);
1408 }
1409 if (!val[0]) snprintf (val, maxlen, "%i", v_short);
1410
1411 break;
1412
1413 case EXIF_TAG_PLANAR_CONFIGURATION:
1414 case EXIF_TAG_SENSING_METHOD:
1415 case EXIF_TAG_ORIENTATION:
1416 case EXIF_TAG_YCBCR_POSITIONING:
1417 case EXIF_TAG_PHOTOMETRIC_INTERPRETATION:
1418 case EXIF_TAG_CUSTOM_RENDERED:
1419 case EXIF_TAG_EXPOSURE_MODE:
1420 case EXIF_TAG_WHITE_BALANCE:
1421 case EXIF_TAG_SCENE_CAPTURE_TYPE:
1422 case EXIF_TAG_GAIN_CONTROL:
1423 case EXIF_TAG_SATURATION:
1424 case EXIF_TAG_CONTRAST:
1425 case EXIF_TAG_SHARPNESS:
1426 CF (e, EXIF_FORMAT_SHORT, val, maxlen)
1427 CC (e, 1, val, maxlen)
1428 v_short = exif_get_short (e->data, o);
1429
1430 /* Search the tag */
1431 for (i = 0; list[i].tag && (list[i].tag != e->tag); i++);
1432 if (!list[i].tag) {
1433 snprintf (val, maxlen, _("Internal error (unknown "
1434 "value %i)"), v_short);
1435 break;
1436 }
1437
1438 /* Find the value */
1439 for (j = 0; list[i].strings[j] && (j < v_short); j++);
1440 if (!list[i].strings[j])
1441 snprintf (val, maxlen, "%i", v_short);
1442 else if (!*list[i].strings[j])
1443 snprintf (val, maxlen, _("Unknown value %i"), v_short);
1444 else
1445 strncpy (val, _(list[i].strings[j]), maxlen-1);
1446 break;
1447
1448 case EXIF_TAG_XP_TITLE:
1449 case EXIF_TAG_XP_COMMENT:
1450 case EXIF_TAG_XP_AUTHOR:
1451 case EXIF_TAG_XP_KEYWORDS:
1452 case EXIF_TAG_XP_SUBJECT:
1453 {
1454 unsigned char *utf16;
1455
1456 /* Sanity check the size to prevent overflow. Note EXIF files are 64kb at most. */
1457 if (e->size >= 65536 - sizeof(uint16_t)*2) break;
1458
1459 /* The tag may not be U+0000-terminated , so make a local
1460 U+0000-terminated copy before converting it */
1461 utf16 = exif_mem_alloc (e->priv->mem, e->size+sizeof(uint16_t)+1);
1462 if (!utf16) break;
1463 memcpy(utf16, e->data, e->size);
1464
1465 /* NUL terminate the string. If the size is odd (which isn't possible
1466 * for a valid UTF16 string), then this will overwrite the high byte of
1467 * the final half word, plus add a full zero NUL word at the end.
1468 */
1469 utf16[e->size] = 0;
1470 utf16[e->size+1] = 0;
1471 utf16[e->size+2] = 0;
1472
1473 /* Warning! The texts are converted from UTF16 to UTF8 */
1474 /* FIXME: use iconv to convert into the locale encoding */
1475 exif_convert_utf16_to_utf8(val, utf16, maxlen);
1476 exif_mem_free(e->priv->mem, utf16);
1477 break;
1478 }
1479
1480 case EXIF_TAG_MAKER_NOTE:
1481 if (e->data && e->size <= maxlen) {
1482 for (unsigned int i = 0; i < e->size && i < maxlen - 1; ++i) {
1483 val[i] = e->data[i];
1484 }
1485 }
1486 break;
1487
1488 default:
1489 /* Use a generic value formatting */
1490 exif_entry_format_value(e, val, maxlen);
1491 }
1492
1493 return val;
1494 }
1495
1496 static
exif_entry_initialize_gps(ExifEntry * e,ExifTag tag)1497 void exif_entry_initialize_gps(ExifEntry *e, ExifTag tag) {
1498 const ExifGPSIfdTagInfo* info = exif_get_gps_tag_info(tag);
1499
1500 if(!info) {
1501 e->components = 0;
1502 e->format = EXIF_FORMAT_UNDEFINED;
1503 e->size = 0;
1504 e->data = NULL;
1505 return;
1506 }
1507
1508 e->format = info->format;
1509 e->components = info->components;
1510
1511 if(info->components == 0) {
1512 /* No pre-allocation */
1513 e->size = 0;
1514 e->data = NULL;
1515 } else {
1516 int hasDefault = (info->default_size && info->default_value);
1517 unsigned int allocSize = hasDefault ? info->default_size : (exif_format_get_size (e->format) * e->components);
1518 e->size = allocSize;
1519 e->data = exif_entry_alloc (e, e->size);
1520 if(!e->data) {
1521 clear_entry(e);
1522 return;
1523 }
1524 if(hasDefault) {
1525 if (e->size < info->default_size) {
1526 return;
1527 }
1528 memcpy(e->data, info->default_value, info->default_size);
1529 }
1530 }
1531 }
1532
1533 /*!
1534 * \bug Log and report failed exif_mem_malloc() calls.
1535 */
1536 void
exif_entry_initialize(ExifEntry * e,ExifTag tag)1537 exif_entry_initialize (ExifEntry *e, ExifTag tag)
1538 {
1539 ExifRational r;
1540 ExifByteOrder o;
1541
1542 if (!e || !e->parent || e->data || !e->parent->parent)
1543 return;
1544 /* We need the byte order */
1545 o = exif_data_get_byte_order (e->parent->parent);
1546
1547 e->tag = tag;
1548
1549 if(exif_entry_get_ifd(e) == EXIF_IFD_GPS) {
1550 exif_entry_initialize_gps(e, tag);
1551 return;
1552 }
1553
1554 switch (tag) {
1555
1556 /* LONG, 1 component, no default */
1557 case EXIF_TAG_PIXEL_X_DIMENSION:
1558 case EXIF_TAG_PIXEL_Y_DIMENSION:
1559 case EXIF_TAG_EXIF_IFD_POINTER:
1560 case EXIF_TAG_GPS_INFO_IFD_POINTER:
1561 case EXIF_TAG_INTEROPERABILITY_IFD_POINTER:
1562 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH:
1563 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT:
1564 case EXIF_TAG_RECOMMENDED_EXPOSURE_INDEX:
1565 case EXIF_TAG_STANDARD_OUTPUT_SENSITIVITY:
1566 case EXIF_TAG_ROWS_PER_STRIP:
1567 case EXIF_TAG_STRIP_BYTE_COUNTS:
1568 case EXIF_TAG_JPEG_PROC:
1569 case EXIF_TAG_ISO_SPEED_LATITUDE_YYY:
1570 case EXIF_TAG_ISO_SPEED_LATITUDE_ZZZ:
1571 case EXIF_TAG_ISO_SPEED:
1572 case EXIF_TAG_STRIP_OFFSETS:
1573 e->components = 1;
1574 e->format = EXIF_FORMAT_LONG;
1575 e->size = exif_format_get_size (e->format) * e->components;
1576 e->data = exif_entry_alloc (e, e->size);
1577 if (!e->data) { clear_entry(e); break; }
1578 break;
1579
1580 /* LONG, 2 components, default 0 0 */
1581 case EXIF_TAG_DEFALUT_CROP_SIZE:
1582 e->components = 2;
1583 e->format = EXIF_FORMAT_LONG;
1584 e->size = exif_format_get_size (e->format) * e->components;
1585 e->data = exif_entry_alloc (e, e->size);
1586 if (!e->data) { clear_entry(e); break; }
1587 exif_set_long (e->data, o, 0);
1588 exif_set_long (
1589 e->data + exif_format_get_size (e->format),
1590 o, 0);
1591 break;
1592
1593 /* SHORT, 1 component, no default */
1594 case EXIF_TAG_SENSING_METHOD:
1595 case EXIF_TAG_PHOTOMETRIC_INTERPRETATION:
1596 case EXIF_TAG_COMPRESSION:
1597 case EXIF_TAG_EXPOSURE_MODE:
1598 case EXIF_TAG_WHITE_BALANCE:
1599 case EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM:
1600 case EXIF_TAG_GAIN_CONTROL:
1601 case EXIF_TAG_SUBJECT_DISTANCE_RANGE:
1602 case EXIF_TAG_FLASH:
1603 case EXIF_TAG_ISO_SPEED_RATINGS:
1604 case EXIF_TAG_SENSITIVITY_TYPE:
1605 case EXIF_TAG_NEW_SUBFILE_TYPE:
1606 case EXIF_TAG_OLD_SUBFILE_TYPE:
1607 case EXIF_TAG_COMPOSITE_IMAGE:
1608
1609 /* SHORT, 1 component, default 0 */
1610 case EXIF_TAG_IMAGE_WIDTH:
1611 case EXIF_TAG_IMAGE_LENGTH:
1612 case EXIF_TAG_EXPOSURE_PROGRAM:
1613 case EXIF_TAG_LIGHT_SOURCE:
1614 case EXIF_TAG_METERING_MODE:
1615 case EXIF_TAG_CUSTOM_RENDERED:
1616 case EXIF_TAG_SCENE_CAPTURE_TYPE:
1617 case EXIF_TAG_CONTRAST:
1618 case EXIF_TAG_SATURATION:
1619 case EXIF_TAG_SHARPNESS:
1620 e->components = 1;
1621 e->format = EXIF_FORMAT_SHORT;
1622 e->size = exif_format_get_size (e->format) * e->components;
1623 e->data = exif_entry_alloc (e, e->size);
1624 if (!e->data) { clear_entry(e); break; }
1625 exif_set_short (e->data, o, 0);
1626 break;
1627
1628 /* SHORT, 1 component, default 1 */
1629 case EXIF_TAG_ORIENTATION:
1630 case EXIF_TAG_PLANAR_CONFIGURATION:
1631 case EXIF_TAG_YCBCR_POSITIONING:
1632 e->components = 1;
1633 e->format = EXIF_FORMAT_SHORT;
1634 e->size = exif_format_get_size (e->format) * e->components;
1635 e->data = exif_entry_alloc (e, e->size);
1636 if (!e->data) { clear_entry(e); break; }
1637 exif_set_short (e->data, o, 1);
1638 break;
1639
1640 /* SHORT, 1 component, default 2 */
1641 case EXIF_TAG_RESOLUTION_UNIT:
1642 case EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT:
1643 e->components = 1;
1644 e->format = EXIF_FORMAT_SHORT;
1645 e->size = exif_format_get_size (e->format) * e->components;
1646 e->data = exif_entry_alloc (e, e->size);
1647 if (!e->data) { clear_entry(e); break; }
1648 exif_set_short (e->data, o, 2);
1649 break;
1650
1651 /* SHORT, 1 component, default 3 */
1652 case EXIF_TAG_SAMPLES_PER_PIXEL:
1653 e->components = 1;
1654 e->format = EXIF_FORMAT_SHORT;
1655 e->size = exif_format_get_size (e->format) * e->components;
1656 e->data = exif_entry_alloc (e, e->size);
1657 if (!e->data) { clear_entry(e); break; }
1658 exif_set_short (e->data, o, 3);
1659 break;
1660
1661 /* SHORT, 1 component, default 0xffff */
1662 case EXIF_TAG_COLOR_SPACE:
1663 e->components = 1;
1664 e->format = EXIF_FORMAT_SHORT;
1665 e->size = exif_format_get_size (e->format) * e->components;
1666 e->data = exif_entry_alloc (e, e->size);
1667 if (!e->data) { clear_entry(e); break; }
1668 exif_set_short (e->data, o, 0xffff);
1669 break;
1670
1671 /* SHORT, 2 components, default 0 0 */
1672 case EXIF_TAG_SUBJECT_LOCATION:
1673 case EXIF_TAG_SUBJECT_AREA:
1674 e->components = 2;
1675 e->format = EXIF_FORMAT_SHORT;
1676 e->size = exif_format_get_size(e->format) * e->components;
1677 e->data = exif_entry_alloc(e, e->size);
1678 if (!e->data) { clear_entry(e); break; }
1679 exif_set_short(e->data, o, 0);
1680 exif_set_short(
1681 e->data + exif_format_get_size(e->format),
1682 o, 0);
1683 break;
1684
1685 /* SHORT, 3 components, default 8 8 8 */
1686 case EXIF_TAG_BITS_PER_SAMPLE:
1687 e->components = 3;
1688 e->format = EXIF_FORMAT_SHORT;
1689 e->size = exif_format_get_size (e->format) * e->components;
1690 e->data = exif_entry_alloc (e, e->size);
1691 if (!e->data) { clear_entry(e); break; }
1692 exif_set_short (e->data, o, 8);
1693 exif_set_short (
1694 e->data + exif_format_get_size (e->format),
1695 o, 8);
1696 exif_set_short (
1697 e->data + 2 * exif_format_get_size (e->format),
1698 o, 8);
1699 break;
1700
1701 /* SHORT, 4 components, default 0 0 0 1 */
1702 case EXIF_TAG_DNG_VERSION:
1703 e->components = 4;
1704 e->format = EXIF_FORMAT_SHORT;
1705 e->size = exif_format_get_size (e->format) * e->components;
1706 e->data = exif_entry_alloc (e, e->size);
1707 if (!e->data) { clear_entry(e); break; }
1708 exif_set_short (e->data, o, 0);
1709 exif_set_short (
1710 e->data + exif_format_get_size (e->format),
1711 o, 0);
1712 exif_set_short (
1713 e->data + 2 * exif_format_get_size (e->format),
1714 o, 0);
1715 exif_set_short(
1716 e->data + 3 * exif_format_get_size(e->format),
1717 o, 1);
1718 break;
1719
1720 /* SHORT, 2 components, default 2 1 */
1721 case EXIF_TAG_YCBCR_SUB_SAMPLING:
1722 case EXIF_TAG_SOURCE_IMAGE_NUMBER_OF_COMPOSITE_IMAGE:
1723 e->components = 2;
1724 e->format = EXIF_FORMAT_SHORT;
1725 e->size = exif_format_get_size (e->format) * e->components;
1726 e->data = exif_entry_alloc (e, e->size);
1727 if (!e->data) { clear_entry(e); break; }
1728 exif_set_short (e->data, o, 2);
1729 exif_set_short (
1730 e->data + exif_format_get_size (e->format),
1731 o, 1);
1732 break;
1733
1734 /* SRATIONAL, 1 component, no default */
1735 case EXIF_TAG_EXPOSURE_BIAS_VALUE:
1736 case EXIF_TAG_BRIGHTNESS_VALUE:
1737 case EXIF_TAG_SHUTTER_SPEED_VALUE:
1738 e->components = 1;
1739 e->format = EXIF_FORMAT_SRATIONAL;
1740 e->size = exif_format_get_size (e->format) * e->components;
1741 e->data = exif_entry_alloc (e, e->size);
1742 if (!e->data) { clear_entry(e); break; }
1743 break;
1744
1745 /* RATIONAL, 1 component, no default */
1746 case EXIF_TAG_EXPOSURE_TIME:
1747 case EXIF_TAG_FOCAL_PLANE_X_RESOLUTION:
1748 case EXIF_TAG_FOCAL_PLANE_Y_RESOLUTION:
1749 case EXIF_TAG_EXPOSURE_INDEX:
1750 case EXIF_TAG_FLASH_ENERGY:
1751 case EXIF_TAG_FNUMBER:
1752 case EXIF_TAG_FOCAL_LENGTH:
1753 case EXIF_TAG_SUBJECT_DISTANCE:
1754 case EXIF_TAG_MAX_APERTURE_VALUE:
1755 case EXIF_TAG_APERTURE_VALUE:
1756 case EXIF_TAG_COMPRESSED_BITS_PER_PIXEL:
1757 case EXIF_TAG_PRIMARY_CHROMATICITIES:
1758 case EXIF_TAG_DIGITAL_ZOOM_RATIO:
1759 case EXIF_TAG_GAMMA:
1760 e->components = 1;
1761 e->format = EXIF_FORMAT_RATIONAL;
1762 e->size = exif_format_get_size (e->format) * e->components;
1763 e->data = exif_entry_alloc (e, e->size);
1764 if (!e->data) { clear_entry(e); break; }
1765 break;
1766
1767 /* RATIONAL, 1 component, default 72/1 */
1768 case EXIF_TAG_X_RESOLUTION:
1769 case EXIF_TAG_Y_RESOLUTION:
1770 e->components = 1;
1771 e->format = EXIF_FORMAT_RATIONAL;
1772 e->size = exif_format_get_size (e->format) * e->components;
1773 e->data = exif_entry_alloc (e, e->size);
1774 if (!e->data) { clear_entry(e); break; }
1775 r.numerator = 72;
1776 r.denominator = 1;
1777 exif_set_rational (e->data, o, r);
1778 break;
1779
1780 /* RATIONAL, 2 components, no default */
1781 case EXIF_TAG_WHITE_POINT:
1782 e->components = 2;
1783 e->format = EXIF_FORMAT_RATIONAL;
1784 e->size = exif_format_get_size (e->format) * e->components;
1785 e->data = exif_entry_alloc (e, e->size);
1786 if (!e->data) { clear_entry(e); break; }
1787 break;
1788
1789 /* RATIONAL, 3 components, no default */
1790 case EXIF_TAG_YCBCR_COEFFICIENTS:
1791 e->components = 3;
1792 e->format = EXIF_FORMAT_RATIONAL;
1793 e->size = exif_format_get_size(e->format) * e->components;
1794 e->data = exif_entry_alloc(e, e->size);
1795 if (!e->data) { clear_entry(e); break; }
1796 break;
1797
1798 /* RATIONAL, 4 components, no default */
1799 case EXIF_TAG_LENS_SPECIFICATION:
1800 e->components = 4;
1801 e->format = EXIF_FORMAT_RATIONAL;
1802 e->size = exif_format_get_size(e->format) * e->components;
1803 e->data = exif_entry_alloc(e, e->size);
1804 if (!e->data) { clear_entry(e); break; }
1805 break;
1806
1807 /* RATIONAL, 6 components */
1808 case EXIF_TAG_REFERENCE_BLACK_WHITE:
1809 e->components = 6;
1810 e->format = EXIF_FORMAT_RATIONAL;
1811 e->size = exif_format_get_size (e->format) * e->components;
1812 e->data = exif_entry_alloc (e, e->size);
1813 if (!e->data) { clear_entry(e); break; }
1814 r.denominator = 1;
1815 r.numerator = 0;
1816 exif_set_rational (e->data, o, r);
1817 r.numerator = 255;
1818 exif_set_rational (
1819 e->data + exif_format_get_size (e->format), o, r);
1820 r.numerator = 0;
1821 exif_set_rational (
1822 e->data + 2 * exif_format_get_size (e->format), o, r);
1823 r.numerator = 255;
1824 exif_set_rational (
1825 e->data + 3 * exif_format_get_size (e->format), o, r);
1826 r.numerator = 0;
1827 exif_set_rational (
1828 e->data + 4 * exif_format_get_size (e->format), o, r);
1829 r.numerator = 255;
1830 exif_set_rational (
1831 e->data + 5 * exif_format_get_size (e->format), o, r);
1832 break;
1833
1834 /* ASCII, 20 components */
1835 case EXIF_TAG_DATE_TIME:
1836 case EXIF_TAG_DATE_TIME_ORIGINAL:
1837 case EXIF_TAG_DATE_TIME_DIGITIZED:
1838 {
1839 time_t t;
1840 #if defined(HAVE_LOCALTIME_R) || defined(HAVE_LOCALTIME_S)
1841 struct tm tms;
1842 #endif
1843 struct tm *tm;
1844
1845 t = time (NULL);
1846 #if defined(HAVE_LOCALTIME_S)
1847 localtime_s (&tms, &t);
1848 tm = &tms;
1849 #elif defined(HAVE_LOCALTIME_R)
1850 tm = localtime_r (&t, &tms);
1851 #else
1852 tm = localtime (&t);
1853 #endif
1854 e->components = 20;
1855 e->format = EXIF_FORMAT_ASCII;
1856 e->size = exif_format_get_size (e->format) * e->components;
1857 e->data = exif_entry_alloc (e, e->size);
1858 if (!e->data) { clear_entry(e); break; }
1859 snprintf ((char *) e->data, e->size,
1860 "%04i:%02i:%02i %02i:%02i:%02i",
1861 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
1862 tm->tm_hour, tm->tm_min, tm->tm_sec);
1863 break;
1864 }
1865
1866 /* ASCII, no default */
1867 case EXIF_TAG_SUB_SEC_TIME:
1868 case EXIF_TAG_SUB_SEC_TIME_ORIGINAL:
1869 case EXIF_TAG_SUB_SEC_TIME_DIGITIZED:
1870 case EXIF_TAG_IMAGE_UNIQUE_ID:
1871 case EXIF_TAG_RELATED_SOUND_FILE:
1872 case EXIF_TAG_LENS_MAKE:
1873 case EXIF_TAG_LENS_MODEL:
1874 case EXIF_TAG_LENS_SERIAL_NUMBER:
1875 case EXIF_TAG_OFFSET_TIME_DIGITIZED:
1876 case EXIF_TAG_OFFSET_TIME_ORIGINAL:
1877 case EXIF_TAG_OFFSET_TIME:
1878 case EXIF_TAG_CAMERA_OWNER_NAME:
1879 case EXIF_TAG_BODY_SERIAL_NUMBER:
1880 case EXIF_TAG_SPECTRAL_SENSITIVITY:
1881 e->components = 0;
1882 e->format = EXIF_FORMAT_ASCII;
1883 e->size = 0;
1884 e->data = NULL;
1885 break;
1886
1887 /* ASCII, default "[None]" */
1888 case EXIF_TAG_IMAGE_DESCRIPTION:
1889 case EXIF_TAG_MAKE:
1890 case EXIF_TAG_MODEL:
1891 case EXIF_TAG_SOFTWARE:
1892 case EXIF_TAG_ARTIST:
1893 e->components = strlen (_("[None]")) + 1;
1894 e->format = EXIF_FORMAT_ASCII;
1895 e->size = exif_format_get_size (e->format) * e->components;
1896 e->data = exif_entry_alloc (e, e->size);
1897 if (!e->data) { clear_entry(e); break; }
1898 strncpy ((char *)e->data, _("[None]"), e->size);
1899 break;
1900 /* ASCII, default "[None]\0[None]\0" */
1901 case EXIF_TAG_COPYRIGHT:
1902 e->components = (strlen (_("[None]")) + 1) * 2;
1903 e->format = EXIF_FORMAT_ASCII;
1904 e->size = exif_format_get_size (e->format) * e->components;
1905 e->data = exif_entry_alloc (e, e->size);
1906 if (!e->data) { clear_entry(e); break; }
1907 strcpy (((char *)e->data) + 0, _("[None]"));
1908 strcpy (((char *)e->data) + strlen (_("[None]")) + 1, _("[None]"));
1909 break;
1910
1911 /* UNDEFINED, 1 component, default 1 */
1912 case EXIF_TAG_SCENE_TYPE:
1913 e->components = 1;
1914 e->format = EXIF_FORMAT_UNDEFINED;
1915 e->size = exif_format_get_size (e->format) * e->components;
1916 e->data = exif_entry_alloc (e, e->size);
1917 if (!e->data) { clear_entry(e); break; }
1918 e->data[0] = 0x01;
1919 break;
1920
1921 /* UNDEFINED, 1 component, default 3 */
1922 case EXIF_TAG_FILE_SOURCE:
1923 e->components = 1;
1924 e->format = EXIF_FORMAT_UNDEFINED;
1925 e->size = exif_format_get_size (e->format) * e->components;
1926 e->data = exif_entry_alloc (e, e->size);
1927 if (!e->data) { clear_entry(e); break; }
1928 e->data[0] = 0x03;
1929 break;
1930
1931 /* UNDEFINED, 4 components, default 48 49 48 48 */
1932 case EXIF_TAG_FLASH_PIX_VERSION:
1933 e->components = 4;
1934 e->format = EXIF_FORMAT_UNDEFINED;
1935 e->size = exif_format_get_size (e->format) * e->components;
1936 e->data = exif_entry_alloc (e, e->size);
1937 if (!e->data) { clear_entry(e); break; }
1938 memcpy (e->data, "0100", 4);
1939 break;
1940
1941 /* UNDEFINED, 4 components, default 48 50 49 48 */
1942 case EXIF_TAG_EXIF_VERSION:
1943 e->components = 4;
1944 e->format = EXIF_FORMAT_UNDEFINED;
1945 e->size = exif_format_get_size (e->format) * e->components;
1946 e->data = exif_entry_alloc (e, e->size);
1947 if (!e->data) { clear_entry(e); break; }
1948 memcpy (e->data, "0210", 4);
1949 break;
1950
1951 /* UNDEFINED, 4 components, default 1 2 3 0 */
1952 case EXIF_TAG_COMPONENTS_CONFIGURATION:
1953 e->components = 4;
1954 e->format = EXIF_FORMAT_UNDEFINED;
1955 e->size = exif_format_get_size (e->format) * e->components;
1956 e->data = exif_entry_alloc (e, e->size);
1957 if (!e->data) { clear_entry(e); break; }
1958 e->data[0] = 1;
1959 e->data[1] = 2;
1960 e->data[2] = 3;
1961 e->data[3] = 0;
1962 break;
1963
1964 /* UNDEFINED, no components, no default */
1965 /* Use this if the tag is otherwise unsupported */
1966 case EXIF_TAG_MAKER_NOTE:
1967 case EXIF_TAG_USER_COMMENT:
1968 case EXIF_TAG_SOURCE_EXPOSURE_TIMES_OF_COMPOSITE_IMAGE:
1969 default:
1970 e->components = 0;
1971 e->format = EXIF_FORMAT_UNDEFINED;
1972 e->size = 0;
1973 e->data = NULL;
1974 break;
1975 }
1976 }
1977