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.
22 #include "exif-content.h"
28 static const unsigned char ExifHeader[] = {0x45, 0x78, 0x69, 0x66, 0x00, 0x00};
30 struct _ExifContentPrivate
32 unsigned int ref_count;
38 exif_content_new (void)
40 ExifMem *mem = exif_mem_new_default ();
41 ExifContent *content = exif_content_new_mem (mem);
49 exif_content_new_mem (ExifMem *mem)
53 if (!mem) return NULL;
55 content = exif_mem_alloc (mem, (ExifLong) sizeof (ExifContent));
58 content->priv = exif_mem_alloc (mem,
59 (ExifLong) sizeof (ExifContentPrivate));
61 exif_mem_free (mem, content);
65 content->priv->ref_count = 1;
67 content->priv->mem = mem;
74 exif_content_ref (ExifContent *content)
76 content->priv->ref_count++;
80 exif_content_unref (ExifContent *content)
82 content->priv->ref_count--;
83 if (!content->priv->ref_count)
84 exif_content_free (content);
88 exif_content_free (ExifContent *content)
94 for (i = 0; i < content->count; i++)
95 exif_entry_unref (content->entries[i]);
97 ExifMem *mem = content->priv->mem;
98 exif_mem_free (mem, content->entries);
99 exif_mem_free (mem, content->priv);
100 exif_mem_free (mem, content);
101 exif_mem_unref (mem);
106 exif_content_dump (ExifContent *content, unsigned int indent)
111 for (i = 0; i < 2 * indent; i++)
118 printf ("%sDumping exif content (%i entries)...\n", buf,
120 for (i = 0; i < content->count; i++)
121 exif_entry_dump (content->entries[i], indent + 1);
125 exif_content_add_entry (ExifContent *content, ExifEntry *entry)
127 if (!content || !content->priv || !entry || entry->parent) return;
129 entry->parent = content;
130 content->entries = exif_mem_realloc (content->priv->mem,
131 content->entries, sizeof (ExifEntry) * (content->count + 1));
132 if (!content->entries) return;
133 content->entries[content->count] = entry;
134 exif_entry_ref (entry);
139 exif_content_remove_entry (ExifContent *c, ExifEntry *e)
143 if (!c || !c->priv || !e || (e->parent != c)) return;
145 /* Search the entry */
146 for (i = 0; i < c->count; i++) if (c->entries[i] == e) break;
147 if (i == c->count) return;
149 /* Remove the entry */
150 memmove (&c->entries[i], &c->entries[i + 1],
151 sizeof (ExifEntry) * (c->count - i - 1));
154 exif_entry_unref (e);
155 c->entries = exif_mem_realloc (c->priv->mem, c->entries,
156 sizeof(ExifEntry) * c->count);
160 exif_content_get_entry (ExifContent *content, ExifTag tag)
167 for (i = 0; i < content->count; i++)
168 if (content->entries[i]->tag == tag)
169 return (content->entries[i]);
174 exif_content_foreach_entry (ExifContent *content,
175 ExifContentForeachEntryFunc func, void *data)
179 if (!content || !func)
182 for (i = 0; i < content->count; i++)
183 func (content->entries[i], data);