3 * Copyright © 2001 Lutz Müller <lutz@users.sourceforge.net>
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.
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.
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., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
23 #include <libexif/exif-mnote-data.h>
24 #include <libexif/exif-data.h>
25 #include <libexif/exif-ifd.h>
26 #include <libexif/exif-mnote-data-priv.h>
27 #include <libexif/exif-utils.h>
28 #include <libexif/exif-loader.h>
29 #include <libexif/exif-log.h>
31 #include <libjpeg/jpeg-marker.h>
33 #include <libexif/olympus/exif-mnote-data-olympus.h>
34 #include <libexif/canon/exif-mnote-data-canon.h>
35 #include <libexif/pentax/exif-mnote-data-pentax.h>
42 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
44 #if defined(__WATCOMC__) || defined(_MSC_VER)
45 # define strncasecmp strnicmp
48 static const unsigned char ExifHeader[] = {0x45, 0x78, 0x69, 0x66, 0x00, 0x00};
50 struct _ExifDataPrivate
59 unsigned int ref_count;
61 /* Temporarily used while loading data */
62 unsigned int offset_mnote;
66 exif_data_alloc (ExifData *data, unsigned int i)
70 if (!data || !i) return NULL;
72 d = exif_mem_alloc (data->priv->mem, i);
75 EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", i);
80 exif_data_get_mnote_data (ExifData *d)
82 return (d && d->priv) ? d->priv->md : NULL;
88 ExifMem *mem = exif_mem_new_default ();
89 ExifData *d = exif_data_new_mem (mem);
97 exif_data_new_mem (ExifMem *mem)
102 if (!mem) return NULL;
104 data = exif_mem_alloc (mem, sizeof (ExifData));
105 if (!data) return (NULL);
106 data->priv = exif_mem_alloc (mem, sizeof (ExifDataPrivate));
107 if (!data->priv) { exif_mem_free (mem, data); return (NULL); }
108 data->priv->ref_count = 1;
110 data->priv->mem = mem;
113 for (i = 0; i < EXIF_IFD_COUNT; i++) {
114 data->ifd[i] = exif_content_new_mem (data->priv->mem);
116 exif_data_free (data);
119 data->ifd[i]->parent = data;
126 exif_data_new_from_data (const unsigned char *data, unsigned int size)
130 edata = exif_data_new ();
131 exif_data_load_data (edata, data, size);
136 exif_data_load_data_entry (ExifData *data, ExifEntry *entry,
137 const unsigned char *d,
138 unsigned int size, unsigned int offset)
140 unsigned int s, doff;
142 entry->tag = exif_get_short (d + offset + 0, data->priv->order);
143 entry->format = exif_get_short (d + offset + 2, data->priv->order);
144 entry->components = exif_get_long (d + offset + 4, data->priv->order);
146 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
147 "Loading entry 0x%x ('%s')...", entry->tag,
148 exif_tag_get_name (entry->tag));
151 * Size? If bigger than 4 bytes, the actual data is not
152 * in the entry but somewhere else (offset).
154 s = exif_format_get_size (entry->format) * entry->components;
158 doff = exif_get_long (d + offset + 8, data->priv->order);
166 entry->data = exif_data_alloc (data, s);
169 memcpy (entry->data, d + doff, s);
172 #ifndef EXIF_DONT_CHANGE_MAKER_NOTE
173 /* If this is the MakerNote, remember the offset */
174 if (entry->tag == EXIF_TAG_MAKER_NOTE) {
175 if (entry->size > 6) exif_log (data->priv->log,
176 EXIF_LOG_CODE_DEBUG, "ExifData",
177 "MakerNote found (%02x %02x %02x %02x "
178 "%02x %02x %02x...).",
179 entry->data[0], entry->data[1], entry->data[2],
180 entry->data[3], entry->data[4], entry->data[5],
182 data->priv->offset_mnote = doff;
186 exif_entry_fix (entry);
190 exif_data_save_data_entry (ExifData *data, ExifEntry *e,
191 unsigned char **d, unsigned int *ds,
194 unsigned int doff, s;
196 if (!data || !data->priv) return;
199 * Each entry is 12 bytes long. The memory for the entry has
200 * already been allocated.
202 exif_set_short (*d + 6 + offset + 0,
203 data->priv->order, (ExifShort) e->tag);
204 exif_set_short (*d + 6 + offset + 2,
205 data->priv->order, (ExifShort) e->format);
207 /* If this is the maker note tag, update it. */
208 if ((e->tag == EXIF_TAG_MAKER_NOTE) && data->priv->md) {
209 exif_mem_free (data->priv->mem, e->data);
212 exif_mnote_data_set_offset (data->priv->md, *ds - 6);
213 exif_mnote_data_save (data->priv->md, &e->data, &e->size);
214 e->components = e->size;
217 exif_set_long (*d + 6 + offset + 4,
218 data->priv->order, e->components);
221 * Size? If bigger than 4 bytes, the actual data is not in
222 * the entry but somewhere else.
224 s = exif_format_get_size (e->format) * e->components;
228 *d = exif_mem_realloc (data->priv->mem, *d, *ds);
230 EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", *ds);
233 exif_set_long (*d + 6 + offset + 8,
234 data->priv->order, doff);
238 /* Write the data. Fill unneeded bytes with 0. */
239 memcpy (*d + 6 + doff, e->data, s);
240 if (s < 4) memset (*d + 6 + doff + s, 0, (4 - s));
244 exif_data_load_data_thumbnail (ExifData *data, const unsigned char *d,
245 unsigned int ds, ExifLong offset, ExifLong size)
247 if (ds < offset + size) {
248 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
249 "Bogus thumbnail offset and size: %i < %i + %i.",
250 (int) ds, (int) offset, (int) size);
253 if (data->data) exif_mem_free (data->priv->mem, data->data);
255 data->data = exif_data_alloc (data, data->size);
256 if (!data->data) return;
257 memcpy (data->data, d + offset, data->size);
261 #define CHECK_REC(i) \
262 if (data->ifd[(i)] == ifd) { \
263 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, \
264 "ExifData", "Recursive entry in IFD " \
265 "'%s' detected. Skipping...", \
266 exif_ifd_get_name (i)); \
271 exif_data_load_data_content (ExifData *data, ExifContent *ifd,
272 const unsigned char *d,
273 unsigned int ds, unsigned int offset)
275 ExifLong o, thumbnail_offset = 0, thumbnail_length = 0;
281 if (!data || !data->priv) return;
283 /* Read the number of entries */
284 if (offset >= ds - 1) return;
285 n = exif_get_short (d + offset, data->priv->order);
286 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
287 "Loading %i entries...", n);
290 /* Check if we have enough data. */
291 if (offset + 12 * n > ds) n = (ds - offset) / 12;
293 for (i = 0; i < n; i++) {
295 tag = exif_get_short (d + offset + 12 * i, data->priv->order);
297 case EXIF_TAG_EXIF_IFD_POINTER:
298 case EXIF_TAG_GPS_INFO_IFD_POINTER:
299 case EXIF_TAG_INTEROPERABILITY_IFD_POINTER:
300 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH:
301 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT:
302 o = exif_get_long (d + offset + 12 * i + 8,
305 case EXIF_TAG_EXIF_IFD_POINTER:
306 CHECK_REC (EXIF_IFD_EXIF);
307 exif_data_load_data_content (data,
308 data->ifd[EXIF_IFD_EXIF], d, ds, o);
310 case EXIF_TAG_GPS_INFO_IFD_POINTER:
311 CHECK_REC (EXIF_IFD_GPS);
312 exif_data_load_data_content (data,
313 data->ifd[EXIF_IFD_GPS], d, ds, o);
315 case EXIF_TAG_INTEROPERABILITY_IFD_POINTER:
316 CHECK_REC (EXIF_IFD_INTEROPERABILITY);
317 exif_data_load_data_content (data,
318 data->ifd[EXIF_IFD_INTEROPERABILITY], d, ds, o);
320 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT:
321 thumbnail_offset = o;
322 if (thumbnail_offset && thumbnail_length)
323 exif_data_load_data_thumbnail (data, d,
324 ds, thumbnail_offset,
327 case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH:
328 thumbnail_length = o;
329 if (thumbnail_offset && thumbnail_length)
330 exif_data_load_data_thumbnail (data, d,
331 ds, thumbnail_offset,
341 * If we don't know the tag, changes are high
342 * that the EXIF data does not follow the standard.
344 if (!exif_tag_get_name (tag)) {
345 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
346 "Unknown tag %x (entry %i)", tag, i);
349 entry = exif_entry_new_mem (data->priv->mem);
350 exif_content_add_entry (ifd, entry);
351 exif_data_load_data_entry (data, entry, d, ds,
353 exif_entry_unref (entry);
360 exif_data_save_data_content (ExifData *data, ExifContent *ifd,
361 unsigned char **d, unsigned int *ds,
364 unsigned int j, n_ptr = 0, n_thumb = 0;
367 if (!data || !data->priv || !ifd || !d || !ds) return;
369 for (i = 0; i < EXIF_IFD_COUNT; i++)
370 if (ifd == data->ifd[i])
372 if (i == EXIF_IFD_COUNT)
376 * Check if we need some extra entries for pointers or the thumbnail.
382 * The pointer to IFD_EXIF is in IFD_0. The pointer to
383 * IFD_INTEROPERABILITY is in IFD_EXIF.
385 if (data->ifd[EXIF_IFD_EXIF]->count ||
386 data->ifd[EXIF_IFD_INTEROPERABILITY]->count)
389 /* The pointer to IFD_GPS is in IFD_0. */
390 if (data->ifd[EXIF_IFD_GPS]->count)
399 if (data->ifd[EXIF_IFD_INTEROPERABILITY]->count)
406 * Allocate enough memory for all entries
407 * and the number of entries.
409 *ds += (2 + (ifd->count + n_ptr + n_thumb) * 12 + 4);
410 *d = exif_mem_realloc (data->priv->mem, *d, *ds);
412 EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData", *ds);
416 /* Save the number of entries */
417 exif_set_short (*d + 6 + offset, data->priv->order,
418 (ExifShort) (ifd->count + n_ptr + n_thumb));
421 /* Save each entry */
422 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
423 "Saving %i entries (IFD '%s', offset: %i)...",
424 ifd->count, exif_ifd_get_name (i), offset);
425 for (j = 0; j < ifd->count; j++)
426 exif_data_save_data_entry (data, ifd->entries[j],
427 d, ds, offset + 12 * j);
428 offset += 12 * ifd->count;
430 /* Now save special entries. */
435 * The pointer to IFD_EXIF is in IFD_0.
436 * However, the pointer to IFD_INTEROPERABILITY is in IFD_EXIF,
437 * therefore, if IFD_INTEROPERABILITY is not empty, we need
438 * IFD_EXIF even if latter is empty.
440 if (data->ifd[EXIF_IFD_EXIF]->count ||
441 data->ifd[EXIF_IFD_INTEROPERABILITY]->count) {
442 exif_set_short (*d + 6 + offset + 0, data->priv->order,
443 EXIF_TAG_EXIF_IFD_POINTER);
444 exif_set_short (*d + 6 + offset + 2, data->priv->order,
446 exif_set_long (*d + 6 + offset + 4, data->priv->order,
448 exif_set_long (*d + 6 + offset + 8, data->priv->order,
450 exif_data_save_data_content (data,
451 data->ifd[EXIF_IFD_EXIF], d, ds, *ds - 6);
455 /* The pointer to IFD_GPS is in IFD_0, too. */
456 if (data->ifd[EXIF_IFD_GPS]->count) {
457 exif_set_short (*d + 6 + offset + 0, data->priv->order,
458 EXIF_TAG_GPS_INFO_IFD_POINTER);
459 exif_set_short (*d + 6 + offset + 2, data->priv->order,
461 exif_set_long (*d + 6 + offset + 4, data->priv->order,
463 exif_set_long (*d + 6 + offset + 8, data->priv->order,
465 exif_data_save_data_content (data,
466 data->ifd[EXIF_IFD_GPS], d, ds, *ds - 6);
474 * The pointer to IFD_INTEROPERABILITY is in IFD_EXIF.
477 if (data->ifd[EXIF_IFD_INTEROPERABILITY]->count) {
478 exif_set_short (*d + 6 + offset + 0, data->priv->order,
479 EXIF_TAG_INTEROPERABILITY_IFD_POINTER);
480 exif_set_short (*d + 6 + offset + 2, data->priv->order,
482 exif_set_long (*d + 6 + offset + 4, data->priv->order,
484 exif_set_long (*d + 6 + offset + 8, data->priv->order,
486 exif_data_save_data_content (data,
487 data->ifd[EXIF_IFD_INTEROPERABILITY], d, ds,
496 * Information about the thumbnail (if any) is saved in
501 /* EXIF_TAG_JPEG_INTERCHANGE_FORMAT */
502 exif_set_short (*d + 6 + offset + 0, data->priv->order,
503 EXIF_TAG_JPEG_INTERCHANGE_FORMAT);
504 exif_set_short (*d + 6 + offset + 2, data->priv->order,
506 exif_set_long (*d + 6 + offset + 4, data->priv->order,
508 exif_set_long (*d + 6 + offset + 8, data->priv->order,
511 *d = exif_mem_realloc (data->priv->mem, *d, *ds);
513 EXIF_LOG_NO_MEMORY (data->priv->log, "ExifData",
517 memcpy (*d + *ds - data->size, data->data, data->size);
520 /* EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH */
521 exif_set_short (*d + 6 + offset + 0, data->priv->order,
522 EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH);
523 exif_set_short (*d + 6 + offset + 2, data->priv->order,
525 exif_set_long (*d + 6 + offset + 4, data->priv->order,
527 exif_set_long (*d + 6 + offset + 8, data->priv->order,
537 /* Correctly terminate the directory */
538 if (i == EXIF_IFD_0 && (data->ifd[EXIF_IFD_1]->count ||
542 * We are saving IFD 0. Tell where IFD 1 starts and save
545 exif_set_long (*d + 6 + offset, data->priv->order, *ds - 6);
546 exif_data_save_data_content (data, data->ifd[EXIF_IFD_1], d, ds,
549 exif_set_long (*d + 6 + offset, data->priv->order, 0);
553 exif_data_load_data (ExifData *data, const unsigned char *d_orig,
554 unsigned int ds_orig)
560 const unsigned char *d = d_orig;
561 unsigned int ds = ds_orig, len;
563 if (!data || !data->priv || !d || !ds) return;
565 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
566 "Parsing %i byte(s) EXIF data...\n", ds);
569 * It can be that the data starts with the EXIF header. If it does
570 * not, search the EXIF marker.
573 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
577 if (!memcmp (d, ExifHeader, 6)) {
578 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
579 "Found EXIF header.");
582 while ((d[0] == 0xff) && ds) {
587 /* JPEG_MARKER_SOI */
588 if (d[0] == JPEG_MARKER_SOI) {
594 /* JPEG_MARKER_APP0 */
595 if (d[0] == JPEG_MARKER_APP0) {
598 l = (d[0] << 8) | d[1];
606 /* JPEG_MARKER_APP1 */
607 if (d[0] == JPEG_MARKER_APP1)
610 /* Unknown marker or data. Give up. */
611 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG,
612 "ExifData", "EXIF marker not found.");
618 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG,
619 "ExifData", "Size too small.");
622 len = (d[0] << 8) | d[1];
623 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
624 "We have to deal with %i byte(s) of EXIF data.",
631 * Verify the exif header
632 * (offset 2, length 6).
635 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
639 if (memcmp (d, ExifHeader, 6)) {
640 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
641 "EXIF header not found.");
645 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
646 "Found EXIF header.");
648 /* Byte order (offset 6, length 2) */
651 if (!memcmp (d + 6, "II", 2))
652 data->priv->order = EXIF_BYTE_ORDER_INTEL;
653 else if (!memcmp (d + 6, "MM", 2))
654 data->priv->order = EXIF_BYTE_ORDER_MOTOROLA;
659 if (exif_get_short (d + 8, data->priv->order) != 0x002a)
663 offset = exif_get_long (d + 10, data->priv->order);
664 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
665 "IFD 0 at %i.", (int) offset);
667 /* Parse the actual exif data (offset 14) */
668 exif_data_load_data_content (data, data->ifd[EXIF_IFD_0], d + 6,
672 n = exif_get_short (d + 6 + offset, data->priv->order);
673 offset = exif_get_long (d + 6 + offset + 2 + 12 * n, data->priv->order);
675 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
676 "IFD 1 at %i.", (int) offset);
679 if (offset > ds - 6) {
680 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG,
681 "ExifData", "Bogus offset!");
685 exif_data_load_data_content (data, data->ifd[EXIF_IFD_1], d + 6,
690 * If we got an EXIF_TAG_MAKER_NOTE, try to interpret it. Some
691 * cameras use pointers in the maker note tag that point to the
692 * space between IFDs. Here is the only place where we have access
695 e = exif_data_get_entry (data, EXIF_TAG_MAKER_NOTE);
698 /* Olympus & Nikon */
699 if ((e->size >= 5) && (!memcmp (e->data, "OLYMP", 5) ||
700 !memcmp (e->data, "Nikon", 5))) {
701 data->priv->md = exif_mnote_data_olympus_new (data->priv->mem);
704 em = exif_data_get_entry (data, EXIF_TAG_MAKE);
705 /* Pentax & some variant of Nikon */
706 if ((e->size >= 2) && (e->data[0] == 0x00)
707 && (e->data[1] == 0x1b)) {
708 if (em && !strncasecmp (exif_entry_get_value (em, value, sizeof(value)), "Nikon", 5)) {
709 data->priv->md = exif_mnote_data_olympus_new (data->priv->mem);
711 data->priv->md = exif_mnote_data_pentax_new (data->priv->mem);
718 if (!strcmp (exif_entry_get_value (em, value, sizeof(value)), "Canon"))
719 data->priv->md = exif_mnote_data_canon_new (data->priv->mem);
725 * If we are able to interpret the maker note, do so.
727 if (data->priv->md) {
728 exif_mnote_data_log (data->priv->md, data->priv->log);
729 exif_mnote_data_set_byte_order (data->priv->md,
731 exif_mnote_data_set_offset (data->priv->md,
732 data->priv->offset_mnote);
733 exif_mnote_data_load (data->priv->md, d, ds);
739 exif_data_save_data (ExifData *data, unsigned char **d, unsigned int *ds)
741 if (!data || !d || !ds)
746 *d = exif_data_alloc (data, *ds);
748 memcpy (*d, ExifHeader, 6);
750 /* Order (offset 6) */
751 if (data->priv->order == EXIF_BYTE_ORDER_INTEL) {
752 memcpy (*d + 6, "II", 2);
754 memcpy (*d + 6, "MM", 2);
757 /* Fixed value (2 bytes, offset 8) */
758 exif_set_short (*d + 8, data->priv->order, 0x002a);
761 * IFD 0 offset (4 bytes, offset 10).
762 * We will start 8 bytes after the
763 * EXIF header (2 bytes for order, another 2 for the test, and
764 * 4 bytes for the IFD 0 offset make 8 bytes together).
766 exif_set_long (*d + 10, data->priv->order, 8);
768 /* Now save IFD 0. IFD 1 will be saved automatically. */
769 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
771 exif_data_save_data_content (data, data->ifd[EXIF_IFD_0], d, ds,
773 exif_log (data->priv->log, EXIF_LOG_CODE_DEBUG, "ExifData",
774 "Saved %i byte(s) EXIF data.", *ds);
778 exif_data_new_from_file (const char *path)
783 loader = exif_loader_new ();
784 exif_loader_write_file (loader, path);
785 edata = exif_loader_get_data (loader);
786 exif_loader_unref (loader);
792 exif_data_ref (ExifData *data)
797 data->priv->ref_count++;
801 exif_data_unref (ExifData *data)
806 data->priv->ref_count--;
807 if (!data->priv->ref_count)
808 exif_data_free (data);
812 exif_data_free (ExifData *data)
815 ExifMem *mem = (data && data->priv) ? data->priv->mem : NULL;
819 for (i = 0; i < EXIF_IFD_COUNT; i++) {
821 exif_content_unref (data->ifd[i]);
827 exif_mem_free (mem, data->data);
832 if (data->priv->md) {
833 exif_mnote_data_unref (data->priv->md);
834 data->priv->md = NULL;
836 exif_mem_free (mem, data->priv);
837 exif_mem_free (mem, data);
840 exif_mem_unref (mem);
844 exif_data_dump (ExifData *data)
851 for (i = 0; i < EXIF_IFD_COUNT; i++) {
852 if (data->ifd[i] && data->ifd[i]->count) {
853 printf ("Dumping IFD '%s'...\n",
854 exif_ifd_get_name (i));
855 exif_content_dump (data->ifd[i], 0);
860 printf ("%i byte(s) thumbnail data available.", data->size);
861 if (data->size >= 4) {
862 printf ("0x%02x 0x%02x ... 0x%02x 0x%02x\n",
863 data->data[0], data->data[1],
864 data->data[data->size - 2],
865 data->data[data->size - 1]);
871 exif_data_get_byte_order (ExifData *data)
876 return (data->priv->order);
880 exif_data_foreach_content (ExifData *data, ExifDataForeachContentFunc func,
888 for (i = 0; i < EXIF_IFD_COUNT; i++)
889 func (data->ifd[i], user_data);
892 typedef struct _ByteOrderChangeData ByteOrderChangeData;
893 struct _ByteOrderChangeData {
894 ExifByteOrder old, new;
898 entry_set_byte_order (ExifEntry *e, void *data)
900 ByteOrderChangeData *d = data;
912 case EXIF_FORMAT_SHORT:
913 for (i = 0; i < e->components; i++) {
914 s = exif_get_short (e->data +
915 (i * exif_format_get_size (e->format)),
917 exif_set_short (e->data +
918 (i * exif_format_get_size (e->format)),
922 case EXIF_FORMAT_LONG:
923 for (i = 0; i < e->components; i++) {
924 l = exif_get_long (e->data +
925 (i * exif_format_get_size (e->format)),
927 exif_set_long (e->data +
928 (i * exif_format_get_size (e->format)),
932 case EXIF_FORMAT_RATIONAL:
933 for (i = 0; i < e->components; i++) {
934 r = exif_get_rational (e->data +
935 (i * exif_format_get_size (e->format)),
937 exif_set_rational (e->data +
938 (i * exif_format_get_size (e->format)),
942 case EXIF_FORMAT_SLONG:
943 for (i = 0; i < e->components; i++) {
944 sl = exif_get_slong (e->data +
945 (i * exif_format_get_size (e->format)),
947 exif_set_slong (e->data +
948 (i * exif_format_get_size (e->format)),
952 case EXIF_FORMAT_SRATIONAL:
953 for (i = 0; i < e->components; i++) {
954 sr = exif_get_srational (e->data +
955 (i * exif_format_get_size (e->format)),
957 exif_set_srational (e->data +
958 (i * exif_format_get_size (e->format)),
962 case EXIF_FORMAT_UNDEFINED:
963 case EXIF_FORMAT_BYTE:
964 case EXIF_FORMAT_SBYTE:
965 case EXIF_FORMAT_ASCII:
973 content_set_byte_order (ExifContent *content, void *data)
975 exif_content_foreach_entry (content, entry_set_byte_order, data);
979 exif_data_set_byte_order (ExifData *data, ExifByteOrder order)
981 ByteOrderChangeData d;
983 if (!data || (order == data->priv->order))
986 d.old = data->priv->order;
988 exif_data_foreach_content (data, content_set_byte_order, &d);
989 data->priv->order = order;
991 exif_mnote_data_set_byte_order (data->priv->md, order);
995 exif_data_log (ExifData *data, ExifLog *log)
997 if (!data || !data->priv) return;
998 exif_log_unref (data->priv->log);
999 data->priv->log = log;
1003 /* Used internally within libexif */
1004 ExifLog *exif_data_get_log (ExifData *);
1006 exif_data_get_log (ExifData *data)
1008 if (!data || !data->priv) return NULL;
1009 return data->priv->log;