273 lines
7.3 KiB
C
273 lines
7.3 KiB
C
/*
|
|
* copyright (c) 2009 Michael Niedermayer
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 FFmpeg; 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"
|
|
#include "time_internal.h"
|
|
#include "bprint.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 = NULL;
|
|
char *oldval = NULL, *copy_key = NULL, *copy_value = NULL;
|
|
|
|
if (!(flags & AV_DICT_MULTIKEY)) {
|
|
tag = av_dict_get(m, key, NULL, flags);
|
|
}
|
|
if (flags & AV_DICT_DONT_STRDUP_KEY)
|
|
copy_key = (void *)key;
|
|
else
|
|
copy_key = av_strdup(key);
|
|
if (flags & AV_DICT_DONT_STRDUP_VAL)
|
|
copy_value = (void *)value;
|
|
else if (copy_key)
|
|
copy_value = av_strdup(value);
|
|
if (!m)
|
|
m = *pm = av_mallocz(sizeof(*m));
|
|
if (!m || (key && !copy_key) || (value && !copy_value))
|
|
goto err_out;
|
|
|
|
if (tag) {
|
|
if (flags & AV_DICT_DONT_OVERWRITE) {
|
|
av_free(copy_key);
|
|
av_free(copy_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 if (copy_value) {
|
|
AVDictionaryEntry *tmp = av_realloc_array(m->elems,
|
|
m->count + 1, sizeof(*m->elems));
|
|
if (!tmp)
|
|
goto err_out;
|
|
m->elems = tmp;
|
|
}
|
|
if (copy_value) {
|
|
m->elems[m->count].key = copy_key;
|
|
m->elems[m->count].value = copy_value;
|
|
if (oldval && flags & AV_DICT_APPEND) {
|
|
size_t len = strlen(oldval) + strlen(copy_value) + 1;
|
|
char *newval = av_mallocz(len);
|
|
if (!newval)
|
|
goto err_out;
|
|
av_strlcat(newval, oldval, len);
|
|
av_freep(&oldval);
|
|
av_strlcat(newval, copy_value, len);
|
|
m->elems[m->count].value = newval;
|
|
av_freep(©_value);
|
|
}
|
|
m->count++;
|
|
} else {
|
|
av_freep(©_key);
|
|
}
|
|
if (!m->count) {
|
|
av_freep(&m->elems);
|
|
av_freep(pm);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_out:
|
|
if (m && !m->count) {
|
|
av_freep(&m->elems);
|
|
av_freep(pm);
|
|
}
|
|
av_free(copy_key);
|
|
av_free(copy_value);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value,
|
|
int flags)
|
|
{
|
|
char valuestr[22];
|
|
snprintf(valuestr, sizeof(valuestr), "%"PRId64, value);
|
|
flags &= ~AV_DICT_DONT_STRDUP_VAL;
|
|
return av_dict_set(pm, key, valuestr, flags);
|
|
}
|
|
|
|
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_freep(&m->elems[m->count].key);
|
|
av_freep(&m->elems[m->count].value);
|
|
}
|
|
av_freep(&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;
|
|
}
|
|
|
|
int av_dict_get_string(const AVDictionary *m, char **buffer,
|
|
const char key_val_sep, const char pairs_sep)
|
|
{
|
|
AVDictionaryEntry *t = NULL;
|
|
AVBPrint bprint;
|
|
int cnt = 0;
|
|
char special_chars[] = {pairs_sep, key_val_sep, '\0'};
|
|
|
|
if (!buffer || pairs_sep == '\0' || key_val_sep == '\0' || pairs_sep == key_val_sep ||
|
|
pairs_sep == '\\' || key_val_sep == '\\')
|
|
return AVERROR(EINVAL);
|
|
|
|
if (!av_dict_count(m)) {
|
|
*buffer = av_strdup("");
|
|
return *buffer ? 0 : AVERROR(ENOMEM);
|
|
}
|
|
|
|
av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
|
|
while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
|
|
if (cnt++)
|
|
av_bprint_append_data(&bprint, &pairs_sep, 1);
|
|
av_bprint_escape(&bprint, t->key, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
|
|
av_bprint_append_data(&bprint, &key_val_sep, 1);
|
|
av_bprint_escape(&bprint, t->value, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
|
|
}
|
|
return av_bprint_finalize(&bprint, buffer);
|
|
}
|
|
|
|
int avpriv_dict_set_timestamp(AVDictionary **dict, const char *key, int64_t timestamp)
|
|
{
|
|
time_t seconds = timestamp / 1000000;
|
|
struct tm *ptm, tmbuf;
|
|
ptm = gmtime_r(&seconds, &tmbuf);
|
|
if (ptm) {
|
|
char buf[32];
|
|
if (!strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", ptm))
|
|
return AVERROR_EXTERNAL;
|
|
av_strlcatf(buf, sizeof(buf), ".%06dZ", (int)(timestamp % 1000000));
|
|
return av_dict_set(dict, key, buf, 0);
|
|
} else {
|
|
return AVERROR_EXTERNAL;
|
|
}
|
|
}
|