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-content.h>
29 static const unsigned char ExifHeader[] = {0x45, 0x78, 0x69, 0x66, 0x00, 0x00};
31 struct _ExifContentPrivate
33 unsigned int ref_count;
39 exif_content_new (void)
41 ExifMem *mem = exif_mem_new_default ();
42 ExifContent *content = exif_content_new_mem (mem);
50 exif_content_new_mem (ExifMem *mem)
54 if (!mem) return NULL;
56 content = exif_mem_alloc (mem, (ExifLong) sizeof (ExifContent));
59 content->priv = exif_mem_alloc (mem,
60 (ExifLong) sizeof (ExifContentPrivate));
62 exif_mem_free (mem, content);
66 content->priv->ref_count = 1;
68 content->priv->mem = mem;
75 exif_content_ref (ExifContent *content)
77 content->priv->ref_count++;
81 exif_content_unref (ExifContent *content)
83 content->priv->ref_count--;
84 if (!content->priv->ref_count)
85 exif_content_free (content);
89 exif_content_free (ExifContent *content)
95 for (i = 0; i < content->count; i++)
96 exif_entry_unref (content->entries[i]);
98 ExifMem *mem = content->priv->mem;
99 exif_mem_free (mem, content->entries);
100 exif_mem_free (mem, content->priv);
101 exif_mem_free (mem, content);
102 exif_mem_unref (mem);
107 exif_content_dump (ExifContent *content, unsigned int indent)
112 for (i = 0; i < 2 * indent; i++)
119 printf ("%sDumping exif content (%i entries)...\n", buf,
121 for (i = 0; i < content->count; i++)
122 exif_entry_dump (content->entries[i], indent + 1);
126 exif_content_add_entry (ExifContent *content, ExifEntry *entry)
128 if (!content || !content->priv || !entry || entry->parent) return;
130 entry->parent = content;
131 content->entries = exif_mem_realloc (content->priv->mem,
132 content->entries, sizeof (ExifEntry) * (content->count + 1));
133 if (!content->entries) return;
134 content->entries[content->count] = entry;
135 exif_entry_ref (entry);
140 exif_content_remove_entry (ExifContent *c, ExifEntry *e)
144 if (!c || !c->priv || !e || (e->parent != c)) return;
146 /* Search the entry */
147 for (i = 0; i < c->count; i++) if (c->entries[i] == e) break;
148 if (i == c->count) return;
150 /* Remove the entry */
151 memmove (&c->entries[i], &c->entries[i + 1],
152 sizeof (ExifEntry) * (c->count - i - 1));
155 exif_entry_unref (e);
156 c->entries = exif_mem_realloc (c->priv->mem, c->entries,
157 sizeof(ExifEntry) * c->count);
161 exif_content_get_entry (ExifContent *content, ExifTag tag)
168 for (i = 0; i < content->count; i++)
169 if (content->entries[i]->tag == tag)
170 return (content->entries[i]);
175 exif_content_foreach_entry (ExifContent *content,
176 ExifContentForeachEntryFunc func, void *data)
180 if (!content || !func)
183 for (i = 0; i < content->count; i++)
184 func (content->entries[i], data);