> +static inline int path_is_extended(const wchar_t *path)
> +{
> + size_t len = wcslen(path);
> + if (len >= 4 && path[0] == L'\\' && (path[1] == L'\\' || path[1] == L'?')
> && path[2] == L'?' && path[3] == L'\\')
Length check is probably unnecessary: comparisons will reject '\0'
and further comparisons won't run due to short-circuiting.
> + // The length of unc_prefix is 6 plus 1 for terminating zeros
> + temp_w = (wchar_t *)av_calloc(len + 6 + 1, sizeof(wchar_t));
Not really true. The length of unc_prefix is 8.
2 is subtracted because UNC path already has \\ at the beginning.
> + if (len >= 260 || (*ppath_w)[len - 1] == L' ' || (*ppath_w)[len - 1] ==
> L'.') {
1. Please change 260 to MAX_PATH.
2. GetFullPathName removes trailing spaces and dots, so the second part is
always false.
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