Index: libexif/sources/libexif/canon/exif-mnote-data-canon.c |
=================================================================== |
--- libexif/sources/libexif/canon/exif-mnote-data-canon.c (revision 0) |
+++ libexif/sources/libexif/canon/exif-mnote-data-canon.c (revision 0) |
@@ -0,0 +1,389 @@ |
+/* exif-mnote-data-canon.c |
+ * |
+ * Copyright (c) 2002, 2003 Lutz Mueller <lutz@users.sourceforge.net> |
+ * Copyright (c) 2003 Matthieu Castet <mat-c@users.sourceforge.net> |
+ * |
+ * This library is free software; you can redistribute it and/or |
+ * modify it under the terms of the GNU Lesser General Public |
+ * License as published by the Free Software Foundation; either |
+ * version 2 of the License, or (at your option) any later version. |
+ * |
+ * This library is distributed in the hope that it will be useful, |
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
+ * Lesser General Public License for more details. |
+ * |
+ * You should have received a copy of the GNU Lesser General Public |
+ * License along with this library; if not, write to the |
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
+ * Boston, MA 02110-1301 USA. |
+ */ |
+ |
+#include <config.h> |
+#include "exif-mnote-data-canon.h" |
+ |
+#include <stdlib.h> |
+#include <stdio.h> |
+#include <string.h> |
+ |
+#include <libexif/exif-byte-order.h> |
+#include <libexif/exif-utils.h> |
+#include <libexif/exif-data.h> |
+ |
+#define DEBUG |
+ |
+static void |
+exif_mnote_data_canon_clear (ExifMnoteDataCanon *n) |
+{ |
+ ExifMnoteData *d = (ExifMnoteData *) n; |
+ unsigned int i; |
+ |
+ if (!n) return; |
+ |
+ if (n->entries) { |
+ for (i = 0; i < n->count; i++) |
+ if (n->entries[i].data) { |
+ exif_mem_free (d->mem, n->entries[i].data); |
+ n->entries[i].data = NULL; |
+ } |
+ exif_mem_free (d->mem, n->entries); |
+ n->entries = NULL; |
+ n->count = 0; |
+ } |
+} |
+ |
+static void |
+exif_mnote_data_canon_free (ExifMnoteData *n) |
+{ |
+ if (!n) return; |
+ |
+ exif_mnote_data_canon_clear ((ExifMnoteDataCanon *) n); |
+} |
+ |
+static void |
+exif_mnote_data_canon_get_tags (ExifMnoteDataCanon *dc, unsigned int n, |
+ unsigned int *m, unsigned int *s) |
+{ |
+ unsigned int from = 0, to; |
+ |
+ if (!dc || !m) return; |
+ for (*m = 0; *m < dc->count; (*m)++) { |
+ to = from + mnote_canon_entry_count_values (&dc->entries[*m]); |
+ if (to > n) { |
+ if (s) *s = n - from; |
+ break; |
+ } |
+ from = to; |
+ } |
+} |
+ |
+static char * |
+exif_mnote_data_canon_get_value (ExifMnoteData *note, unsigned int n, char *val, unsigned int maxlen) |
+{ |
+ ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note; |
+ unsigned int m, s; |
+ |
+ if (!dc) return NULL; |
+ exif_mnote_data_canon_get_tags (dc, n, &m, &s); |
+ if (m >= dc->count) return NULL; |
+ return mnote_canon_entry_get_value (&dc->entries[m], s, val, maxlen); |
+} |
+ |
+static void |
+exif_mnote_data_canon_set_byte_order (ExifMnoteData *d, ExifByteOrder o) |
+{ |
+ ExifByteOrder o_orig; |
+ ExifMnoteDataCanon *n = (ExifMnoteDataCanon *) d; |
+ unsigned int i; |
+ |
+ if (!n) return; |
+ |
+ o_orig = n->order; |
+ n->order = o; |
+ for (i = 0; i < n->count; i++) { |
+ n->entries[i].order = o; |
+ exif_array_set_byte_order (n->entries[i].format, n->entries[i].data, |
+ n->entries[i].components, o_orig, o); |
+ } |
+} |
+ |
+static void |
+exif_mnote_data_canon_set_offset (ExifMnoteData *n, unsigned int o) |
+{ |
+ if (n) ((ExifMnoteDataCanon *) n)->offset = o; |
+} |
+ |
+static void |
+exif_mnote_data_canon_save (ExifMnoteData *ne, |
+ unsigned char **buf, unsigned int *buf_size) |
+{ |
+ ExifMnoteDataCanon *n = (ExifMnoteDataCanon *) ne; |
+ size_t i, o, s, doff; |
+ unsigned char *t; |
+ size_t ts; |
+ |
+ if (!n || !buf || !buf_size) return; |
+ |
+ /* |
+ * Allocate enough memory for all entries and the number |
+ * of entries. |
+ */ |
+ *buf_size = 2 + n->count * 12 + 4; |
+ *buf = exif_mem_alloc (ne->mem, sizeof (char) * *buf_size); |
+ if (!*buf) { |
+ EXIF_LOG_NO_MEMORY(ne->log, "ExifMnoteCanon", *buf_size); |
+ return; |
+ } |
+ |
+ /* Save the number of entries */ |
+ exif_set_short (*buf, n->order, (ExifShort) n->count); |
+ |
+ /* Save each entry */ |
+ for (i = 0; i < n->count; i++) { |
+ o = 2 + i * 12; |
+ exif_set_short (*buf + o + 0, n->order, (ExifShort) n->entries[i].tag); |
+ exif_set_short (*buf + o + 2, n->order, (ExifShort) n->entries[i].format); |
+ exif_set_long (*buf + o + 4, n->order, |
+ n->entries[i].components); |
+ o += 8; |
+ s = exif_format_get_size (n->entries[i].format) * |
+ n->entries[i].components; |
+ if (s > 65536) { |
+ /* Corrupt data: EXIF data size is limited to the |
+ * maximum size of a JPEG segment (64 kb). |
+ */ |
+ continue; |
+ } |
+ if (s > 4) { |
+ ts = *buf_size + s; |
+ |
+ /* Ensure even offsets. Set padding bytes to 0. */ |
+ if (s & 1) ts += 1; |
+ t = exif_mem_realloc (ne->mem, *buf, |
+ sizeof (char) * ts); |
+ if (!t) { |
+ EXIF_LOG_NO_MEMORY(ne->log, "ExifMnoteCanon", ts); |
+ return; |
+ } |
+ *buf = t; |
+ *buf_size = ts; |
+ doff = *buf_size - s; |
+ if (s & 1) { doff--; *(*buf + *buf_size - 1) = '\0'; } |
+ exif_set_long (*buf + o, n->order, n->offset + doff); |
+ } else |
+ doff = o; |
+ |
+ /* |
+ * Write the data. Fill unneeded bytes with 0. Do not |
+ * crash if data is NULL. |
+ */ |
+ if (!n->entries[i].data) memset (*buf + doff, 0, s); |
+ else memcpy (*buf + doff, n->entries[i].data, s); |
+ if (s < 4) memset (*buf + doff + s, 0, (4 - s)); |
+ } |
+} |
+ |
+/* XXX |
+ * FIXME: exif_mnote_data_canon_load() may fail and there is no |
+ * semantics to express that. |
+ * See bug #1054323 for details, especially the comment by liblit |
+ * after it has supposedly been fixed: |
+ * |
+ * https://sourceforge.net/tracker/?func=detail&aid=1054323&group_id=12272&atid=112272 |
+ * Unfortunately, the "return" statements aren't commented at |
+ * all, so it isn't trivial to find out what is a normal |
+ * return, and what is a reaction to an error condition. |
+ */ |
+ |
+static void |
+exif_mnote_data_canon_load (ExifMnoteData *ne, |
+ const unsigned char *buf, unsigned int buf_size) |
+{ |
+ ExifMnoteDataCanon *n = (ExifMnoteDataCanon *) ne; |
+ ExifShort c; |
+ size_t i, tcount, o, datao; |
+ |
+ if (!n || !buf || !buf_size) { |
+ exif_log (ne->log, EXIF_LOG_CODE_CORRUPT_DATA, |
+ "ExifMnoteCanon", "Short MakerNote"); |
+ return; |
+ } |
+ datao = 6 + n->offset; |
+ if ((datao + 2 < datao) || (datao + 2 < 2) || (datao + 2 > buf_size)) { |
+ exif_log (ne->log, EXIF_LOG_CODE_CORRUPT_DATA, |
+ "ExifMnoteCanon", "Short MakerNote"); |
+ return; |
+ } |
+ |
+ /* Read the number of tags */ |
+ c = exif_get_short (buf + datao, n->order); |
+ datao += 2; |
+ |
+ /* Remove any old entries */ |
+ exif_mnote_data_canon_clear (n); |
+ |
+ /* Reserve enough space for all the possible MakerNote tags */ |
+ n->entries = exif_mem_alloc (ne->mem, sizeof (MnoteCanonEntry) * c); |
+ if (!n->entries) { |
+ EXIF_LOG_NO_MEMORY(ne->log, "ExifMnoteCanon", sizeof (MnoteCanonEntry) * c); |
+ return; |
+ } |
+ |
+ /* Parse the entries */ |
+ tcount = 0; |
+ for (i = c, o = datao; i; --i, o += 12) { |
+ size_t s; |
+ if ((o + 12 < o) || (o + 12 < 12) || (o + 12 > buf_size)) { |
+ exif_log (ne->log, EXIF_LOG_CODE_CORRUPT_DATA, |
+ "ExifMnoteCanon", "Short MakerNote"); |
+ break; |
+ } |
+ |
+ n->entries[tcount].tag = exif_get_short (buf + o, n->order); |
+ n->entries[tcount].format = exif_get_short (buf + o + 2, n->order); |
+ n->entries[tcount].components = exif_get_long (buf + o + 4, n->order); |
+ n->entries[tcount].order = n->order; |
+ |
+ exif_log (ne->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteCanon", |
+ "Loading entry 0x%x ('%s')...", n->entries[tcount].tag, |
+ mnote_canon_tag_get_name (n->entries[tcount].tag)); |
+ |
+ /* |
+ * Size? If bigger than 4 bytes, the actual data is not |
+ * in the entry but somewhere else (offset). |
+ */ |
+ s = exif_format_get_size (n->entries[tcount].format) * |
+ n->entries[tcount].components; |
+ n->entries[tcount].size = s; |
+ if (!s) { |
+ exif_log (ne->log, EXIF_LOG_CODE_CORRUPT_DATA, |
+ "ExifMnoteCanon", |
+ "Invalid zero-length tag size"); |
+ continue; |
+ |
+ } else { |
+ size_t dataofs = o + 8; |
+ if (s > 4) dataofs = exif_get_long (buf + dataofs, n->order) + 6; |
+ if ((dataofs + s < s) || (dataofs + s < dataofs) || (dataofs + s > buf_size)) { |
+ exif_log (ne->log, EXIF_LOG_CODE_DEBUG, |
+ "ExifMnoteCanon", |
+ "Tag data past end of buffer (%u > %u)", |
+ dataofs + s, buf_size); |
+ continue; |
+ } |
+ |
+ n->entries[tcount].data = exif_mem_alloc (ne->mem, s); |
+ if (!n->entries[tcount].data) { |
+ EXIF_LOG_NO_MEMORY(ne->log, "ExifMnoteCanon", s); |
+ continue; |
+ } |
+ memcpy (n->entries[tcount].data, buf + dataofs, s); |
+ } |
+ |
+ /* Tag was successfully parsed */ |
+ ++tcount; |
+ } |
+ /* Store the count of successfully parsed tags */ |
+ n->count = tcount; |
+} |
+ |
+static unsigned int |
+exif_mnote_data_canon_count (ExifMnoteData *n) |
+{ |
+ ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) n; |
+ unsigned int i, c; |
+ |
+ for (i = c = 0; dc && (i < dc->count); i++) |
+ c += mnote_canon_entry_count_values (&dc->entries[i]); |
+ return c; |
+} |
+ |
+static unsigned int |
+exif_mnote_data_canon_get_id (ExifMnoteData *d, unsigned int i) |
+{ |
+ ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) d; |
+ unsigned int m; |
+ |
+ if (!dc) return 0; |
+ exif_mnote_data_canon_get_tags (dc, i, &m, NULL); |
+ if (m >= dc->count) return 0; |
+ return dc->entries[m].tag; |
+} |
+ |
+static const char * |
+exif_mnote_data_canon_get_name (ExifMnoteData *note, unsigned int i) |
+{ |
+ ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note; |
+ unsigned int m, s; |
+ |
+ if (!dc) return NULL; |
+ exif_mnote_data_canon_get_tags (dc, i, &m, &s); |
+ if (m >= dc->count) return NULL; |
+ return mnote_canon_tag_get_name_sub (dc->entries[m].tag, s, dc->options); |
+} |
+ |
+static const char * |
+exif_mnote_data_canon_get_title (ExifMnoteData *note, unsigned int i) |
+{ |
+ ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note; |
+ unsigned int m, s; |
+ |
+ if (!dc) return NULL; |
+ exif_mnote_data_canon_get_tags (dc, i, &m, &s); |
+ if (m >= dc->count) return NULL; |
+ return mnote_canon_tag_get_title_sub (dc->entries[m].tag, s, dc->options); |
+} |
+ |
+static const char * |
+exif_mnote_data_canon_get_description (ExifMnoteData *note, unsigned int i) |
+{ |
+ ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note; |
+ unsigned int m; |
+ |
+ if (!dc) return NULL; |
+ exif_mnote_data_canon_get_tags (dc, i, &m, NULL); |
+ if (m >= dc->count) return NULL; |
+ return mnote_canon_tag_get_description (dc->entries[m].tag); |
+} |
+ |
+int |
+exif_mnote_data_canon_identify (const ExifData *ed, const ExifEntry *e) |
+{ |
+ char value[8]; |
+ ExifEntry *em = exif_data_get_entry (ed, EXIF_TAG_MAKE); |
+ if (!em) |
+ return 0; |
+ return !strcmp (exif_entry_get_value (em, value, sizeof (value)), "Canon"); |
+} |
+ |
+ExifMnoteData * |
+exif_mnote_data_canon_new (ExifMem *mem, ExifDataOption o) |
+{ |
+ ExifMnoteData *d; |
+ ExifMnoteDataCanon *dc; |
+ |
+ if (!mem) return NULL; |
+ |
+ d = exif_mem_alloc (mem, sizeof (ExifMnoteDataCanon)); |
+ if (!d) |
+ return NULL; |
+ |
+ exif_mnote_data_construct (d, mem); |
+ |
+ /* Set up function pointers */ |
+ d->methods.free = exif_mnote_data_canon_free; |
+ d->methods.set_byte_order = exif_mnote_data_canon_set_byte_order; |
+ d->methods.set_offset = exif_mnote_data_canon_set_offset; |
+ d->methods.load = exif_mnote_data_canon_load; |
+ d->methods.save = exif_mnote_data_canon_save; |
+ d->methods.count = exif_mnote_data_canon_count; |
+ d->methods.get_id = exif_mnote_data_canon_get_id; |
+ d->methods.get_name = exif_mnote_data_canon_get_name; |
+ d->methods.get_title = exif_mnote_data_canon_get_title; |
+ d->methods.get_description = exif_mnote_data_canon_get_description; |
+ d->methods.get_value = exif_mnote_data_canon_get_value; |
+ |
+ dc = (ExifMnoteDataCanon*)d; |
+ dc->options = o; |
+ return d; |
+} |
Property changes on: libexif/sources/libexif/canon/exif-mnote-data-canon.c |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |