/* * copyright (c) 2009 Michael Niedermayer * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <strings.h> #include "avstring.h" #include "dict.h" #include "internal.h" #include "mem.h" 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 = key; } else m->elems[m->count].key = av_strdup(key ); if (flags & AV_DICT_DONT_STRDUP_VAL) { m->elems[m->count].value = 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); }