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/*
* 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 <string.h>
#include "avstring.h"
#include "dict.h"
#include "internal.h"
#include "mem.h"
struct AVDictionary {
int count;
AVDictionaryEntry *elems;
};
int av_dict_count(const AVDictionary *m)
{
return m ? m->count : 0;
}
AVDictionaryEntry *av_dict_get(const 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; av_toupper(s[j]) == av_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);
char *oldval = NULL;
int allocated = !!m;
if (!m)
m = *pm = av_mallocz(sizeof(*m));
if (!m)
return AVERROR(ENOMEM);
if (tag) {
if (flags & AV_DICT_DONT_OVERWRITE) {
if (flags & AV_DICT_DONT_STRDUP_KEY) av_free(key);
if (flags & AV_DICT_DONT_STRDUP_VAL) av_free(value);
return 0;
}
if (flags & AV_DICT_APPEND)
oldval = tag->value;
else
av_free(tag->value);
av_free(tag->key);
*tag = m->elems[--m->count];
} else {
int ret = av_reallocp_array(&m->elems,
m->count + 1, sizeof(*m->elems));
if (ret < 0) {
if (allocated)
av_freep(pm);
return ret;
}
}
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 if (oldval && flags & AV_DICT_APPEND) {
int len = strlen(oldval) + strlen(value) + 1;
if (!(oldval = av_realloc(oldval, len)))
return AVERROR(ENOMEM);
av_strlcat(oldval, value, len);
m->elems[m->count].value = oldval;
} else
m->elems[m->count].value = av_strdup(value);
m->count++;
}
if (!m->count) {
av_free(m->elems);
av_freep(pm);
}
return 0;
}
static int parse_key_value_pair(AVDictionary **pm, const char **buf,
const char *key_val_sep, const char *pairs_sep,
int flags)
{
char *key = av_get_token(buf, key_val_sep);
char *val = NULL;
int ret;
if (key && *key && strspn(*buf, key_val_sep)) {
(*buf)++;
val = av_get_token(buf, pairs_sep);
}
if (key && *key && val && *val)
ret = av_dict_set(pm, key, val, flags);
else
ret = AVERROR(EINVAL);
av_freep(&key);
av_freep(&val);
return ret;
}
int av_dict_parse_string(AVDictionary **pm, const char *str,
const char *key_val_sep, const char *pairs_sep,
int flags)
{
int ret;
if (!str)
return 0;
/* ignore STRDUP flags */
flags &= ~(AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
while (*str) {
if ((ret = parse_key_value_pair(pm, &str, key_val_sep, pairs_sep, flags)) < 0)
return ret;
if (*str)
str++;
}
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);
}
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
{
AVDictionaryEntry *t = NULL;
while ((t = av_dict_get(src, "", t, AV_DICT_IGNORE_SUFFIX))) {
int ret = av_dict_set(dst, t->key, t->value, flags);
if (ret < 0)
return ret;
}
return 0;
}
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