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-rw-r--r--libavutil/dict.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/libavutil/dict.c b/libavutil/dict.c
new file mode 100644
index 0000000000..56f1513d32
--- /dev/null
+++ b/libavutil/dict.c
@@ -0,0 +1,110 @@
+/*
+ * copyright (c) 2009 Michael Niedermayer
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <strings.h>
+#include "dict.h"
+#include "internal.h"
+#include "mem.h"
+
+AVDictionaryEntry *
+av_dict_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
+{
+ unsigned int i, j;
+
+ if(!m)
+ return NULL;
+
+ if(prev) i= prev - m->elems + 1;
+ else i= 0;
+
+ for(; i<m->count; i++){
+ const char *s= m->elems[i].key;
+ if(flags & AV_DICT_MATCH_CASE) for(j=0; s[j] == key[j] && key[j]; j++);
+ else for(j=0; toupper(s[j]) == toupper(key[j]) && key[j]; j++);
+ if(key[j])
+ continue;
+ if(s[j] && !(flags & AV_DICT_IGNORE_SUFFIX))
+ continue;
+ return &m->elems[i];
+ }
+ return NULL;
+}
+
+int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
+{
+ AVDictionary *m = *pm;
+ AVDictionaryEntry *tag = av_dict_get(m, key, NULL, flags);
+
+ if(!m)
+ m = *pm = av_mallocz(sizeof(*m));
+
+ if(tag) {
+ if (flags & AV_DICT_DONT_OVERWRITE)
+ return 0;
+ av_free(tag->value);
+ av_free(tag->key);
+ *tag = m->elems[--m->count];
+ } else {
+ AVDictionaryEntry *tmp = av_realloc(m->elems, (m->count+1) * sizeof(*m->elems));
+ if(tmp) {
+ m->elems = tmp;
+ } else
+ return AVERROR(ENOMEM);
+ }
+ if (value) {
+ if (flags & AV_DICT_DONT_STRDUP_KEY) {
+ m->elems[m->count].key = key;
+ } else
+ m->elems[m->count].key = av_strdup(key );
+ if (flags & AV_DICT_DONT_STRDUP_VAL) {
+ m->elems[m->count].value = value;
+ } else
+ m->elems[m->count].value = av_strdup(value);
+ m->count++;
+ }
+ if (!m->count) {
+ av_free(m->elems);
+ av_freep(pm);
+ }
+
+ return 0;
+}
+
+void av_dict_free(AVDictionary **pm)
+{
+ AVDictionary *m = *pm;
+
+ if (m) {
+ while(m->count--) {
+ av_free(m->elems[m->count].key);
+ av_free(m->elems[m->count].value);
+ }
+ av_free(m->elems);
+ }
+ av_freep(pm);
+}
+
+void av_dict_copy(AVDictionary **dst, AVDictionary *src, int flags)
+{
+ AVDictionaryEntry *t = NULL;
+
+ while ((t = av_dict_get(src, "", t, AV_DICT_IGNORE_SUFFIX)))
+ av_dict_set(dst, t->key, t->value, flags);
+}