1 files changed, 209 insertions, 0 deletions
diff --git a/src/libexif/exif-content.c b/src/libexif/exif-content.c
new file mode 100644
index 0000000..39d73ad
--- /dev/null
+++ b/src/libexif/exif-content.c
@@ -0,0 +1,209 @@
+/* exif-content.c
+ *
+ * Copyright © 2001 Lutz Müller <lutz@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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <config.h>
+
+#include <libexif/exif-content.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+static const unsigned char ExifHeader[] = {0x45, 0x78, 0x69, 0x66, 0x00, 0x00};
+
+struct _ExifContentPrivate
+{
+	unsigned int ref_count;
+
+	ExifMem *mem;
+	ExifLog *log;
+};
+
+ExifContent *
+exif_content_new (void)
+{
+	ExifMem *mem = exif_mem_new_default ();
+	ExifContent *content = exif_content_new_mem (mem);
+
+	exif_mem_unref (mem);
+
+	return content;
+}
+
+ExifContent *
+exif_content_new_mem (ExifMem *mem)
+{
+	ExifContent *content;
+
+	if (!mem) return NULL;
+
+	content = exif_mem_alloc (mem, (ExifLong) sizeof (ExifContent));
+	if (!content)
+		return NULL;
+	content->priv = exif_mem_alloc (mem,
+				(ExifLong) sizeof (ExifContentPrivate));
+	if (!content->priv) {
+		exif_mem_free (mem, content);
+		return NULL;
+	}
+
+	content->priv->ref_count = 1;
+
+	content->priv->mem = mem;
+	exif_mem_ref (mem);
+
+	return content;
+}
+
+void
+exif_content_ref (ExifContent *content)
+{
+	content->priv->ref_count++;
+}
+
+void
+exif_content_unref (ExifContent *content)
+{
+	content->priv->ref_count--;
+	if (!content->priv->ref_count)
+		exif_content_free (content);
+}
+
+void
+exif_content_free (ExifContent *content)
+{
+	ExifMem *mem = (content && content->priv) ? content->priv->mem : NULL;
+	unsigned int i;
+
+	if (!content) return;
+
+	for (i = 0; i < content->count; i++)
+		exif_entry_unref (content->entries[i]);
+	exif_mem_free (mem, content->entries);
+
+	if (content->priv) {
+		exif_log_unref (content->priv->log);
+	}
+
+	exif_mem_free (mem, content->priv);
+	exif_mem_free (mem, content);
+	exif_mem_unref (mem);
+}
+
+void
+exif_content_dump (ExifContent *content, unsigned int indent)
+{
+	char buf[1024];
+	unsigned int i;
+
+	for (i = 0; i < 2 * indent; i++)
+		buf[i] = ' ';
+	buf[i] = '\0';
+
+	if (!content)
+		return;
+
+	printf ("%sDumping exif content (%i entries)...\n", buf,
+		content->count);
+	for (i = 0; i < content->count; i++)
+		exif_entry_dump (content->entries[i], indent + 1);
+}
+
+void
+exif_content_add_entry (ExifContent *c, ExifEntry *entry)
+{
+	if (!c || !c->priv || !entry || entry->parent) return;
+
+	/* One tag can only be added once to an IFD. */
+	if (exif_content_get_entry (c, entry->tag)) {
+		exif_log (c->priv->log, EXIF_LOG_CODE_DEBUG, "ExifContent",
+			"An attempt has been made to add "
+			"the tag '%s' twice to an IFD. This is against "
+			"specification.", exif_tag_get_name (entry->tag));
+		return;
+	}
+
+	entry->parent = c;
+	c->entries = exif_mem_realloc (c->priv->mem,
+		c->entries, sizeof (ExifEntry) * (c->count + 1));
+	if (!c->entries) return;
+	c->entries[c->count] = entry;
+	exif_entry_ref (entry);
+	c->count++;
+}
+
+void
+exif_content_remove_entry (ExifContent *c, ExifEntry *e)
+{
+	unsigned int i;
+
+	if (!c || !c->priv || !e || (e->parent != c)) return;
+
+	/* Search the entry */
+	for (i = 0; i < c->count; i++) if (c->entries[i] == e) break;
+	if (i == c->count) return;
+
+	/* Remove the entry */
+	memmove (&c->entries[i], &c->entries[i + 1],
+		 sizeof (ExifEntry) * (c->count - i - 1));
+	c->count--;
+	e->parent = NULL;
+	exif_entry_unref (e);
+	c->entries = exif_mem_realloc (c->priv->mem, c->entries,
+					sizeof(ExifEntry) * c->count);
+}
+
+ExifEntry *
+exif_content_get_entry (ExifContent *content, ExifTag tag)
+{
+	unsigned int i;
+
+	if (!content)
+		return (NULL);
+
+	for (i = 0; i < content->count; i++)
+		if (content->entries[i]->tag == tag)
+			return (content->entries[i]);
+	return (NULL);
+}
+
+void
+exif_content_foreach_entry (ExifContent *content,
+			    ExifContentForeachEntryFunc func, void *data)
+{
+	unsigned int i;
+
+	if (!content || !func)
+		return;
+
+	for (i = 0; i < content->count; i++)
+		func (content->entries[i], data);
+}
+
+void
+exif_content_log (ExifContent *content, ExifLog *log)
+{
+	if (!content || !content->priv || !log || content->priv->log == log)
+		return;
+
+	if (content->priv->log) exif_log_unref (content->priv->log);
+	content->priv->log = log;
+	exif_log_ref (log);
+}