mirror of https://git.ffmpeg.org/ffmpeg.git
131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
/*
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* copyright (c) 2009 Michael Niedermayer
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "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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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 *
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av_dict_get(AVDictionary *m, const char *key, 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) i= prev - m->elems + 1;
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else 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) for(j=0; s[j] == key[j] && key[j]; j++);
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else for(j=0; toupper(s[j]) == toupper(key[j]) && key[j]; j++);
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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, 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(tag) {
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if (flags & AV_DICT_DONT_OVERWRITE)
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return 0;
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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, (m->count+1) * sizeof(*m->elems));
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if(tmp) {
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m->elems = tmp;
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} else
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return AVERROR(ENOMEM);
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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 = key;
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} else
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m->elems[m->count].key = av_strdup(key );
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if (flags & AV_DICT_DONT_STRDUP_VAL) {
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m->elems[m->count].value = 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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if (!(oldval = av_realloc(oldval, len)))
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return AVERROR(ENOMEM);
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av_strlcat(oldval, value, len);
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m->elems[m->count].value = oldval;
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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_free(m->elems);
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av_freep(pm);
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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_free(m->elems[m->count].key);
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av_free(m->elems[m->count].value);
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}
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av_free(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, 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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