[FFmpeg-devel] [PATCH v1 2/3] avutil/avstring: add support for '\\' seperator for the path append

[lance.lmwang at gmail.com]

On Mon, Jan 13, 2020 at 09:44:50PM +0800, lance.lmwang at gmail.com wrote:
> From: Limin Wang <lance.lmwang at gmail.com>
> 
> I don't have a windows develoment system yet, so I had to test with modified
> avutil/tests/avstring.c like below,
> (change / to \\) and change HAVE_DOS_PATHS to 1 in config.h:
> -    TEST_APPEND_PATH_COMPONENT("path", "/", "path");
> -    TEST_APPEND_PATH_COMPONENT("path", "comp", "path/comp");
> -    TEST_APPEND_PATH_COMPONENT("path/", "comp", "path/comp");
> -    TEST_APPEND_PATH_COMPONENT("path", "/comp", "path/comp");
> -    TEST_APPEND_PATH_COMPONENT("path/", "/comp", "path/comp");
> -    TEST_APPEND_PATH_COMPONENT("path/path2/", "/comp/comp2", "path/path2/comp/comp2");
> +    TEST_APPEND_PATH_COMPONENT("path", "\\", "path");
> +    TEST_APPEND_PATH_COMPONENT("path", "comp", "path\\comp");
> +    TEST_APPEND_PATH_COMPONENT("path\\", "comp", "path\\comp");
> +    TEST_APPEND_PATH_COMPONENT("path", "\\comp", "path\\comp");
> +    TEST_APPEND_PATH_COMPONENT("path\\", "\\comp", "path\\comp");
> +    TEST_APPEND_PATH_COMPONENT("path\\path2\\", "\\comp\\comp2", "path\\path2\\comp\\comp2");
> 
> Then do test with fate-avstring for valid checking:
> 
> make fate-avstring SAMPLES=../fate-suite
> master:
> -path/comp = path/comp
> -path/comp = path/comp
> -path/comp = path/comp
> -path/comp = path/comp
> -path/path2/comp/comp2 = path/path2/comp/comp2
> +path/comp = path\comp
> +path\/comp = path\comp
> +path/\comp = path\comp
> +path\/\comp = path\comp
> +path\path2\/\comp\comp2 = path\path2\comp\comp2
> 
> Applied the patch:
> -path/comp = path/comp
> -path/comp = path/comp
> -path/comp = path/comp
> -path/comp = path/comp
> -path/path2/comp/comp2 = path/path2/comp/comp2
> +path\comp = path\comp
> +path\comp = path\comp
> +path\comp = path\comp
> +path\comp = path\comp
> +path\path2\comp\comp2 = path\path2\comp\comp2
> 
> Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
> ---
>  libavutil/avstring.c | 30 +++++++++++++++++-------------
>  1 file changed, 17 insertions(+), 13 deletions(-)
> 
> diff --git a/libavutil/avstring.c b/libavutil/avstring.c
> index f4b8ed2..24bcc7d 100644
> --- a/libavutil/avstring.c
> +++ b/libavutil/avstring.c
> @@ -299,14 +299,20 @@ const char *av_dirname(char *path)
>      return path;
>  }
>  
> +#if HAVE_DOS_PATHS
> +#define SEPARATOR '\\'
> +#else
> +#define SEPARATOR '/'
> +#endif
> +
>  char *av_append_path_component(const char *path, const char *component)
>  {
>      size_t p_len, c_len;
>      char *fullpath;
>  
> -    if (!path)
> +    if (!path || strlen(path) == 0 )
>          return av_strdup(component);
> -    if (!component)
> +    if (!component || strlen(component) == 0)
>          return av_strdup(path);
>  
>      p_len = strlen(path);
> @@ -315,18 +321,16 @@ char *av_append_path_component(const char *path, const char *component)
>          return NULL;
>      fullpath = av_malloc(p_len + c_len + 2);
>      if (fullpath) {
> -        if (p_len) {
> -            av_strlcpy(fullpath, path, p_len + 1);
> -            if (c_len) {
> -                if (fullpath[p_len - 1] != '/' && component[0] != '/')
> -                    fullpath[p_len++] = '/';
> -                else if (fullpath[p_len - 1] == '/' && component[0] == '/')
> -                    p_len--;
> -            }
> -        }
> -        av_strlcpy(&fullpath[p_len], component, c_len + 1);
> -        fullpath[p_len + c_len] = 0;
> +        const char *component1 = component;
> +
> +        av_strlcpy(fullpath, path, p_len + 1);
> +        if (fullpath[p_len - 1] != SEPARATOR)
> +            fullpath[p_len++] = SEPARATOR;
> +        if (*component1 == SEPARATOR)
> +            component1++;
> +        av_strlcpy(fullpath + p_len, component1, strlen(component1) + 1);
>      }
> +
>      return fullpath;
>  }
>  
> -- 
> 2.9.5
> 

ping

-- 
Thanks,
Limin Wang