diff options
Diffstat (limited to 'media/ffvpx/libavutil/dict.c')
| -rw-r--r-- | media/ffvpx/libavutil/dict.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/media/ffvpx/libavutil/dict.c b/media/ffvpx/libavutil/dict.c new file mode 100644 index 000000000..f70c7e005 --- /dev/null +++ b/media/ffvpx/libavutil/dict.c @@ -0,0 +1,255 @@ +/* + * 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 <string.h> + +#include "avstring.h" +#include "dict.h" +#include "internal.h" +#include "mem.h" +#include "bprint.h" + +struct AVDictionary { + int count; + AVDictionaryEntry *elems; +}; + +int av_dict_count(const AVDictionary *m) +{ + return m ? m->count : 0; +} + +AVDictionaryEntry *av_dict_get(const 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; av_toupper(s[j]) == av_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 = NULL; + char *oldval = NULL, *copy_key = NULL, *copy_value = NULL; + + if (!(flags & AV_DICT_MULTIKEY)) { + tag = av_dict_get(m, key, NULL, flags); + } + if (flags & AV_DICT_DONT_STRDUP_KEY) + copy_key = (void *)key; + else + copy_key = av_strdup(key); + if (flags & AV_DICT_DONT_STRDUP_VAL) + copy_value = (void *)value; + else if (copy_key) + copy_value = av_strdup(value); + if (!m) + m = *pm = av_mallocz(sizeof(*m)); + if (!m || (key && !copy_key) || (value && !copy_value)) + goto err_out; + + if (tag) { + if (flags & AV_DICT_DONT_OVERWRITE) { + av_free(copy_key); + av_free(copy_value); + 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 if (copy_value) { + AVDictionaryEntry *tmp = av_realloc(m->elems, + (m->count + 1) * sizeof(*m->elems)); + if (!tmp) + goto err_out; + m->elems = tmp; + } + if (copy_value) { + m->elems[m->count].key = copy_key; + m->elems[m->count].value = copy_value; + if (oldval && flags & AV_DICT_APPEND) { + size_t len = strlen(oldval) + strlen(copy_value) + 1; + char *newval = av_mallocz(len); + if (!newval) + goto err_out; + av_strlcat(newval, oldval, len); + av_freep(&oldval); + av_strlcat(newval, copy_value, len); + m->elems[m->count].value = newval; + av_freep(©_value); + } + m->count++; + } else { + av_freep(©_key); + } + if (!m->count) { + av_freep(&m->elems); + av_freep(pm); + } + + return 0; + +err_out: + if (m && !m->count) { + av_freep(&m->elems); + av_freep(pm); + } + av_free(copy_key); + av_free(copy_value); + return AVERROR(ENOMEM); +} + +int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, + int flags) +{ + char valuestr[22]; + snprintf(valuestr, sizeof(valuestr), "%"PRId64, value); + flags &= ~AV_DICT_DONT_STRDUP_VAL; + return av_dict_set(pm, key, valuestr, flags); +} + +static int parse_key_value_pair(AVDictionary **pm, const char **buf, + const char *key_val_sep, const char *pairs_sep, + int flags) +{ + char *key = av_get_token(buf, key_val_sep); + char *val = NULL; + int ret; + + if (key && *key && strspn(*buf, key_val_sep)) { + (*buf)++; + val = av_get_token(buf, pairs_sep); + } + + if (key && *key && val && *val) + ret = av_dict_set(pm, key, val, flags); + else + ret = AVERROR(EINVAL); + + av_freep(&key); + av_freep(&val); + + return ret; +} + +int av_dict_parse_string(AVDictionary **pm, const char *str, + const char *key_val_sep, const char *pairs_sep, + int flags) +{ + int ret; + + if (!str) + return 0; + + /* ignore STRDUP flags */ + flags &= ~(AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL); + + while (*str) { + if ((ret = parse_key_value_pair(pm, &str, key_val_sep, pairs_sep, flags)) < 0) + return ret; + + if (*str) + str++; + } + + return 0; +} + +void av_dict_free(AVDictionary **pm) +{ + AVDictionary *m = *pm; + + if (m) { + while (m->count--) { + av_freep(&m->elems[m->count].key); + av_freep(&m->elems[m->count].value); + } + av_freep(&m->elems); + } + av_freep(pm); +} + +int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags) +{ + AVDictionaryEntry *t = NULL; + + while ((t = av_dict_get(src, "", t, AV_DICT_IGNORE_SUFFIX))) { + int ret = av_dict_set(dst, t->key, t->value, flags); + if (ret < 0) + return ret; + } + + return 0; +} + +int av_dict_get_string(const AVDictionary *m, char **buffer, + const char key_val_sep, const char pairs_sep) +{ + AVDictionaryEntry *t = NULL; + AVBPrint bprint; + int cnt = 0; + char special_chars[] = {pairs_sep, key_val_sep, '\0'}; + + if (!buffer || pairs_sep == '\0' || key_val_sep == '\0' || pairs_sep == key_val_sep || + pairs_sep == '\\' || key_val_sep == '\\') + return AVERROR(EINVAL); + + if (!av_dict_count(m)) { + *buffer = av_strdup(""); + return *buffer ? 0 : AVERROR(ENOMEM); + } + + av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED); + while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) { + if (cnt++) + av_bprint_append_data(&bprint, &pairs_sep, 1); + av_bprint_escape(&bprint, t->key, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0); + av_bprint_append_data(&bprint, &key_val_sep, 1); + av_bprint_escape(&bprint, t->value, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0); + } + return av_bprint_finalize(&bprint, buffer); +} |