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120 lines
3.4 KiB
120 lines
3.4 KiB
/* |
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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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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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