Re: [FFmpeg-devel] [PATCH v2 07/31] avutil: use av_dict_iterate

[James Almer <jamrial@gmail.com>]

On 11/26/2022 11:46 AM, Marvin Scholz wrote:
> ---
>   libavutil/opt.c        | 12 ++++++------
>   libavutil/tests/dict.c |  2 +-
>   2 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/libavutil/opt.c b/libavutil/opt.c
> index a3940f47fb..0a909a8b22 100644
> --- a/libavutil/opt.c
> +++ b/libavutil/opt.c
> @@ -1742,14 +1742,14 @@ void av_opt_free(void *obj)
>   
>   int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)
>   {
> -    AVDictionaryEntry *t = NULL;
> +    const AVDictionaryEntry *t = NULL;
>       AVDictionary    *tmp = NULL;
>       int ret;
>   
>       if (!options)
>           return 0;
>   
> -    while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {
> +    while ((t = av_dict_iterate(*options, t))) {
>           ret = av_opt_set(obj, t->key, t->value, search_flags);
>           if (ret == AVERROR_OPTION_NOT_FOUND)
>               ret = av_dict_set(&tmp, t->key, t->value, 0);
> @@ -2137,16 +2137,16 @@ FF_ENABLE_DEPRECATION_WARNINGS
>       case AV_OPT_TYPE_DICT: {
>           AVDictionary *dict1 = NULL;
>           AVDictionary *dict2 = *(AVDictionary **)dst;
> -        AVDictionaryEntry *en1 = NULL;
> -        AVDictionaryEntry *en2 = NULL;
> +        const AVDictionaryEntry *en1 = NULL;
> +        const AVDictionaryEntry *en2 = NULL;
>           ret = av_dict_parse_string(&dict1, o->default_val.str, "=", ":", 0);
>           if (ret < 0) {
>               av_dict_free(&dict1);
>               return ret;
>           }
>           do {
> -            en1 = av_dict_get(dict1, "", en1, AV_DICT_IGNORE_SUFFIX);
> -            en2 = av_dict_get(dict2, "", en2, AV_DICT_IGNORE_SUFFIX);
> +            en1 = av_dict_iterate(dict1, en1);
> +            en2 = av_dict_iterate(dict2, en2);
>           } while (en1 && en2 && !strcmp(en1->key, en2->key) && !strcmp(en1->value, en2->value));
>           av_dict_free(&dict1);
>           return (!en1 && !en2);
> diff --git a/libavutil/tests/dict.c b/libavutil/tests/dict.c
> index d053545f4d..91567289c2 100644
> --- a/libavutil/tests/dict.c
> +++ b/libavutil/tests/dict.c
> @@ -52,7 +52,7 @@ static void test_separators(const AVDictionary *m, const char pair, const char v
>   int main(void)
>   {
>       AVDictionary *dict = NULL;
> -    AVDictionaryEntry *e;
> +    const AVDictionaryEntry *e;

Spurious change? You're not touching the test otherwise.

In any case, feel free to add the following to this patch:

> diff --git a/libavutil/tests/dict.c b/libavutil/tests/dict.c
> index d053545f4d..468391a9f3 100644
> --- a/libavutil/tests/dict.c
> +++ b/libavutil/tests/dict.c
> @@ -52,7 +52,7 @@ static void test_separators(const AVDictionary *m, const char pair, const char v
>  int main(void)
>  {
>      AVDictionary *dict = NULL;
> -    AVDictionaryEntry *e;
> +    const AVDictionaryEntry *e;
>      char *buffer = NULL;
> 
>      printf("Testing av_dict_get_string() and av_dict_parse_string()\n");
> @@ -94,8 +94,13 @@ int main(void)
>      if (av_dict_get(dict, NULL, NULL, 0))
>          printf("av_dict_get() does not correctly handle NULL key.\n");
>      e = NULL;
> +    printf("Iterating with av_dict_get()\n");
>      while ((e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX)))
>          printf("%s %s\n", e->key, e->value);
> +    e = NULL;
> +    printf("Iterating with av_dict_iterate()\n");
> +    while ((e = av_dict_iterate(dict, e)))
> +        printf("%s %s\n", e->key, e->value);
>      av_dict_free(&dict);
> 
>      if (av_dict_set(&dict, NULL, "a", 0) >= 0 ||
> diff --git a/tests/ref/fate/dict b/tests/ref/fate/dict
> index 7205e4c845..a519b49163 100644
> --- a/tests/ref/fate/dict
> +++ b/tests/ref/fate/dict
> @@ -30,6 +30,14 @@ ret 0
>  aaa aaa   bbb bbb   ccc ccc   \,='" \,='"
> 
>  Testing av_dict_set()
> +Iterating with av_dict_get()
> +a a
> +b b
> +c c
> +d d
> +e e
> +ff ff
> +Iterating with av_dict_iterate()
>  a a
>  b b
>  c c

That should be enough to compare the output of both functions.
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