2 * copyright (c) 2009 Michael Niedermayer
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 AVDictionaryEntry *elems;
33 int av_dict_count(const AVDictionary *m)
35 return m ? m->count : 0;
38 AVDictionaryEntry *av_dict_get(AVDictionary *m, const char *key,
39 const AVDictionaryEntry *prev, int flags)
47 i = prev - m->elems + 1;
51 for (; i < m->count; i++) {
52 const char *s = m->elems[i].key;
53 if (flags & AV_DICT_MATCH_CASE)
54 for (j = 0; s[j] == key[j] && key[j]; j++)
57 for (j = 0; av_toupper(s[j]) == av_toupper(key[j]) && key[j]; j++)
61 if (s[j] && !(flags & AV_DICT_IGNORE_SUFFIX))
68 int av_dict_set(AVDictionary **pm, const char *key, const char *value,
71 AVDictionary *m = *pm;
72 AVDictionaryEntry *tag = av_dict_get(m, key, NULL, flags);
76 m = *pm = av_mallocz(sizeof(*m));
79 if (flags & AV_DICT_DONT_OVERWRITE)
81 if (flags & AV_DICT_APPEND)
86 *tag = m->elems[--m->count];
88 AVDictionaryEntry *tmp = av_realloc(m->elems,
89 (m->count + 1) * sizeof(*m->elems));
93 return AVERROR(ENOMEM);
96 if (flags & AV_DICT_DONT_STRDUP_KEY)
97 m->elems[m->count].key = (char*)(intptr_t)key;
99 m->elems[m->count].key = av_strdup(key);
100 if (flags & AV_DICT_DONT_STRDUP_VAL) {
101 m->elems[m->count].value = (char*)(intptr_t)value;
102 } else if (oldval && flags & AV_DICT_APPEND) {
103 int len = strlen(oldval) + strlen(value) + 1;
104 char *newval = av_mallocz(len);
106 return AVERROR(ENOMEM);
107 av_strlcat(newval, oldval, len);
109 av_strlcat(newval, value, len);
110 m->elems[m->count].value = newval;
112 m->elems[m->count].value = av_strdup(value);
123 static int parse_key_value_pair(AVDictionary **pm, const char **buf,
124 const char *key_val_sep, const char *pairs_sep,
127 char *key = av_get_token(buf, key_val_sep);
131 if (key && *key && strspn(*buf, key_val_sep)) {
133 val = av_get_token(buf, pairs_sep);
136 if (key && *key && val && *val)
137 ret = av_dict_set(pm, key, val, flags);
139 ret = AVERROR(EINVAL);
147 int av_dict_parse_string(AVDictionary **pm, const char *str,
148 const char *key_val_sep, const char *pairs_sep,
156 /* ignore STRDUP flags */
157 flags &= ~(AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
160 if ((ret = parse_key_value_pair(pm, &str, key_val_sep, pairs_sep, flags)) < 0)
170 void av_dict_free(AVDictionary **pm)
172 AVDictionary *m = *pm;
176 av_free(m->elems[m->count].key);
177 av_free(m->elems[m->count].value);
184 void av_dict_copy(AVDictionary **dst, AVDictionary *src, int flags)
186 AVDictionaryEntry *t = NULL;
188 while ((t = av_dict_get(src, "", t, AV_DICT_IGNORE_SUFFIX)))
189 av_dict_set(dst, t->key, t->value, flags);