| /* |
| * 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 <ctype.h> |
| #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(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; toupper(s[j]) == 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; |
| |
| if(!m) |
| m = *pm = av_mallocz(sizeof(*m)); |
| |
| if(tag) { |
| if (flags & AV_DICT_DONT_OVERWRITE) |
| 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 { |
| AVDictionaryEntry *tmp = av_realloc(m->elems, (m->count+1) * sizeof(*m->elems)); |
| if(tmp) { |
| m->elems = tmp; |
| } else |
| return AVERROR(ENOMEM); |
| } |
| if (value) { |
| if (flags & AV_DICT_DONT_STRDUP_KEY) { |
| m->elems[m->count].key = (char*)(intptr_t)key; |
| } else |
| m->elems[m->count].key = av_strdup(key ); |
| if (flags & AV_DICT_DONT_STRDUP_VAL) { |
| m->elems[m->count].value = (char*)(intptr_t)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; |
| } |
| |
| 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); |
| } |
| |
| void av_dict_copy(AVDictionary **dst, AVDictionary *src, int flags) |
| { |
| AVDictionaryEntry *t = NULL; |
| |
| while ((t = av_dict_get(src, "", t, AV_DICT_IGNORE_SUFFIX))) |
| av_dict_set(dst, t->key, t->value, flags); |
| } |