mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
304 lines
8.4 KiB
C
304 lines
8.4 KiB
C
/*
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* copyright (c) 2009 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <string.h>
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#include "avstring.h"
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#include "dict.h"
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#include "internal.h"
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#include "mem.h"
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#include "bprint.h"
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struct AVDictionary {
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int count;
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AVDictionaryEntry *elems;
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};
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int av_dict_count(const AVDictionary *m)
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{
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return m ? m->count : 0;
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}
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AVDictionaryEntry *av_dict_get(const AVDictionary *m, const char *key,
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const AVDictionaryEntry *prev, int flags)
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{
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unsigned int i, j;
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if (!m)
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return NULL;
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if (prev)
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i = prev - m->elems + 1;
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else
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i = 0;
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for (; i < m->count; i++) {
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const char *s = m->elems[i].key;
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if (flags & AV_DICT_MATCH_CASE)
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for (j = 0; s[j] == key[j] && key[j]; j++)
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;
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else
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for (j = 0; av_toupper(s[j]) == av_toupper(key[j]) && key[j]; j++)
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;
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if (key[j])
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continue;
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if (s[j] && !(flags & AV_DICT_IGNORE_SUFFIX))
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continue;
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return &m->elems[i];
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}
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return NULL;
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}
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int av_dict_set(AVDictionary **pm, const char *key, const char *value,
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int flags)
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{
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AVDictionary *m = *pm;
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AVDictionaryEntry *tag = av_dict_get(m, key, NULL, flags);
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char *oldval = NULL;
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if (!m)
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m = *pm = av_mallocz(sizeof(*m));
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if (!m)
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goto err_out;
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if (tag) {
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if (flags & AV_DICT_DONT_OVERWRITE) {
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if (flags & AV_DICT_DONT_STRDUP_KEY) av_free((void*)key);
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if (flags & AV_DICT_DONT_STRDUP_VAL) av_free((void*)value);
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return 0;
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}
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if (flags & AV_DICT_APPEND)
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oldval = tag->value;
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else
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av_free(tag->value);
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av_free(tag->key);
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*tag = m->elems[--m->count];
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} else {
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AVDictionaryEntry *tmp = av_realloc(m->elems,
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(m->count + 1) * sizeof(*m->elems));
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if (!tmp)
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goto err_out;
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m->elems = tmp;
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}
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if (value) {
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if (flags & AV_DICT_DONT_STRDUP_KEY)
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m->elems[m->count].key = (char*)(intptr_t)key;
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else
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m->elems[m->count].key = av_strdup(key);
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if (!m->elems[m->count].key)
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goto err_out;
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if (flags & AV_DICT_DONT_STRDUP_VAL) {
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m->elems[m->count].value = (char*)(intptr_t)value;
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} else if (oldval && flags & AV_DICT_APPEND) {
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int len = strlen(oldval) + strlen(value) + 1;
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char *newval = av_mallocz(len);
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if (!newval)
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goto err_out;
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av_strlcat(newval, oldval, len);
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av_freep(&oldval);
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av_strlcat(newval, value, len);
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m->elems[m->count].value = newval;
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} else
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m->elems[m->count].value = av_strdup(value);
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m->count++;
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}
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if (!m->count) {
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av_freep(&m->elems);
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av_freep(pm);
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}
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return 0;
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err_out:
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if (m && !m->count) {
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av_freep(&m->elems);
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av_freep(pm);
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}
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if (flags & AV_DICT_DONT_STRDUP_KEY) av_free((void*)key);
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if (flags & AV_DICT_DONT_STRDUP_VAL) av_free((void*)value);
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return AVERROR(ENOMEM);
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}
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int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value,
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int flags)
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{
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char valuestr[22];
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snprintf(valuestr, sizeof(valuestr), "%"PRId64, value);
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return av_dict_set(pm, key, valuestr, flags);
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}
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static int parse_key_value_pair(AVDictionary **pm, const char **buf,
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const char *key_val_sep, const char *pairs_sep,
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int flags)
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{
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char *key = av_get_token(buf, key_val_sep);
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char *val = NULL;
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int ret;
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if (key && *key && strspn(*buf, key_val_sep)) {
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(*buf)++;
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val = av_get_token(buf, pairs_sep);
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}
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if (key && *key && val && *val)
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ret = av_dict_set(pm, key, val, flags);
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else
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ret = AVERROR(EINVAL);
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av_freep(&key);
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av_freep(&val);
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return ret;
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}
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int av_dict_parse_string(AVDictionary **pm, const char *str,
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const char *key_val_sep, const char *pairs_sep,
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int flags)
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{
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int ret;
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if (!str)
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return 0;
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/* ignore STRDUP flags */
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flags &= ~(AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
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while (*str) {
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if ((ret = parse_key_value_pair(pm, &str, key_val_sep, pairs_sep, flags)) < 0)
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return ret;
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if (*str)
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str++;
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}
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return 0;
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}
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void av_dict_free(AVDictionary **pm)
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{
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AVDictionary *m = *pm;
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if (m) {
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while (m->count--) {
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av_freep(&m->elems[m->count].key);
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av_freep(&m->elems[m->count].value);
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}
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av_freep(&m->elems);
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}
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av_freep(pm);
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}
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void av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
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{
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AVDictionaryEntry *t = NULL;
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while ((t = av_dict_get(src, "", t, AV_DICT_IGNORE_SUFFIX)))
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av_dict_set(dst, t->key, t->value, flags);
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}
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int av_dict_get_string(const AVDictionary *m, char **buffer,
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const char key_val_sep, const char pairs_sep)
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{
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AVDictionaryEntry *t = NULL;
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AVBPrint bprint;
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int cnt = 0;
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char special_chars[] = {pairs_sep, key_val_sep, '\0'};
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if (!buffer || pairs_sep == '\0' || key_val_sep == '\0' || pairs_sep == key_val_sep ||
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pairs_sep == '\\' || key_val_sep == '\\')
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return AVERROR(EINVAL);
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if (!av_dict_count(m)) {
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*buffer = av_strdup("");
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return *buffer ? 0 : AVERROR(ENOMEM);
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}
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av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
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while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
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if (cnt++)
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av_bprint_append_data(&bprint, &pairs_sep, 1);
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av_bprint_escape(&bprint, t->key, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
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av_bprint_append_data(&bprint, &key_val_sep, 1);
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av_bprint_escape(&bprint, t->value, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
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}
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return av_bprint_finalize(&bprint, buffer);
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}
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#ifdef TEST
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static void print_dict(const AVDictionary *m)
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{
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AVDictionaryEntry *t = NULL;
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while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
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printf("%s %s ", t->key, t->value);
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printf("\n");
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}
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static void test_separators(const AVDictionary *m, const char pair, const char val)
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{
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AVDictionary *dict = NULL;
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char pairs[] = {pair , '\0'};
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char vals[] = {val, '\0'};
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char *buffer = NULL;
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av_dict_copy(&dict, m, 0);
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print_dict(dict);
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av_dict_get_string(dict, &buffer, val, pair);
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printf("%s\n", buffer);
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av_dict_free(&dict);
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av_dict_parse_string(&dict, buffer, vals, pairs, 0);
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av_freep(&buffer);
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print_dict(dict);
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av_dict_free(&dict);
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}
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int main(void)
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{
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AVDictionary *dict = NULL;
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char *buffer = NULL;
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printf("Testing av_dict_get_string() and av_dict_parse_string()\n");
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av_dict_get_string(dict, &buffer, '=', ',');
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printf("%s\n", buffer);
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av_freep(&buffer);
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av_dict_set(&dict, "aaa", "aaa", 0);
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av_dict_set(&dict, "b,b", "bbb", 0);
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av_dict_set(&dict, "c=c", "ccc", 0);
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av_dict_set(&dict, "ddd", "d,d", 0);
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av_dict_set(&dict, "eee", "e=e", 0);
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av_dict_set(&dict, "f,f", "f=f", 0);
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av_dict_set(&dict, "g=g", "g,g", 0);
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test_separators(dict, ',', '=');
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av_dict_free(&dict);
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av_dict_set(&dict, "aaa", "aaa", 0);
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av_dict_set(&dict, "bbb", "bbb", 0);
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av_dict_set(&dict, "ccc", "ccc", 0);
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av_dict_set(&dict, "\\,=\'\"", "\\,=\'\"", 0);
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test_separators(dict, '"', '=');
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test_separators(dict, '\'', '=');
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test_separators(dict, ',', '"');
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test_separators(dict, ',', '\'');
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test_separators(dict, '\'', '"');
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test_separators(dict, '"', '\'');
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av_dict_free(&dict);
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return 0;
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}
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#endif
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