[FFmpeg-devel] [PATCH] avutil/tests/dict: Explicitly test av_dict_iterate()

[Andreas Rheinhardt]

Andreas Rheinhardt:
> This commit tests it in a way that automatically checks
> that using av_dict_iterate() is equivalent to using
> av_dict_get() with key "" and AV_DICT_IGNORE_SUFFIX.
> 
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
> ---
>  libavutil/tests/dict.c | 30 +++++++++++++++++++++++++-----
>  1 file changed, 25 insertions(+), 5 deletions(-)
> 
> diff --git a/libavutil/tests/dict.c b/libavutil/tests/dict.c
> index 91567289c2..bececefb31 100644
> --- a/libavutil/tests/dict.c
> +++ b/libavutil/tests/dict.c
> @@ -20,10 +20,30 @@
>  
>  #include "libavutil/dict.c"
>  
> +static const AVDictionaryEntry *dict_iterate(const AVDictionary *m,
> +                                             const AVDictionaryEntry *prev)
> +{
> +    const AVDictionaryEntry *dict_get = av_dict_get(m, "", prev, AV_DICT_IGNORE_SUFFIX);
> +    const AVDictionaryEntry *dict_iterate = av_dict_iterate(m, prev);
> +
> +    if (dict_get != dict_iterate) {
> +#define GET(entry, mem) ((entry) ? (entry)->mem : "N/A")
> +        printf("Iterating with av_dict_iterate() yields a different result "
> +               "than iterating with av_dict_get() and AV_DICT_IGNORE_SUFFIX "
> +               "(prev: %p, key %s; av_dict_iterate() %p, key %s, value %s; "
> +               "av_dict_get() %p, key %s, value %s)\n",
> +               prev, GET(prev, key),
> +               dict_iterate, GET(dict_iterate, key), GET(dict_iterate, value),
> +               dict_get, GET(dict_get, key), GET(dict_get, value));
> +#undef GET
> +    }
> +    return dict_iterate;
> +}
> +
>  static void print_dict(const AVDictionary *m)
>  {
> -    AVDictionaryEntry *t = NULL;
> -    while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
> +    const AVDictionaryEntry *t = NULL;
> +    while ((t = dict_iterate(m, t)))
>          printf("%s %s   ", t->key, t->value);
>      printf("\n");
>  }
> @@ -94,7 +114,7 @@ int main(void)
>      if (av_dict_get(dict, NULL, NULL, 0))
>          printf("av_dict_get() does not correctly handle NULL key.\n");
>      e = NULL;
> -    while ((e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX)))
> +    while ((e = dict_iterate(dict, e)))
>          printf("%s %s\n", e->key, e->value);
>      av_dict_free(&dict);
>  
> @@ -106,7 +126,7 @@ int main(void)
>          printf("av_dict_set does not correctly handle NULL key\n");
>  
>      e = NULL;
> -    while ((e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX)))
> +    while ((e = dict_iterate(dict, e)))
>          printf("'%s' '%s'\n", e->key, e->value);
>      av_dict_free(&dict);
>  
> @@ -122,7 +142,7 @@ int main(void)
>      av_dict_set_int(&dict, "12", 1, 0);
>      av_dict_set_int(&dict, "12", 2, AV_DICT_APPEND);
>      e = NULL;
> -    while ((e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX)))
> +    while ((e = dict_iterate(dict, e)))
>          printf("%s %s\n", e->key, e->value);
>      av_dict_free(&dict);
>  

Will apply this patch as well as the remaining one of Marvin's patches
(the one from #7: "avutil: use av_dict_iterate") tonight unless there
are objections.

- Andreas