@@ -41,6 +41,57 @@ static inline int utf8towchar(const char *filename_utf8, wchar_t **filename_w)
return 0;
}
+av_warn_unused_result
+static inline int wchartocp(unsigned int code_page, const wchar_t *filename_w,
+ char **filename)
+{
+ DWORD flags = code_page == CP_UTF8 ? MB_ERR_INVALID_CHARS : 0;
+ int num_chars = WideCharToMultiByte(code_page, flags, filename_w, -1,
+ NULL, 0, NULL, NULL);
+ if (num_chars <= 0) {
+ *filename = NULL;
+ return 0;
+ }
+ *filename = av_calloc(num_chars, sizeof(char));
+ if (!*filename) {
+ errno = ENOMEM;
+ return -1;
+ }
+ WideCharToMultiByte(code_page, flags, filename_w, -1,
+ *filename, num_chars, NULL, NULL);
+ return 0;
+}
+
+av_warn_unused_result
+static inline int wchartoutf8(const wchar_t *filename_w, char **filename)
+{
+ return wchartocp(CP_UTF8, filename_w, filename);
+}
+
+av_warn_unused_result
+static inline int wchartoansi(const wchar_t *filename_w, char **filename)
+{
+ return wchartocp(CP_ACP, filename_w, filename);
+}
+
+av_warn_unused_result
+static inline int utf8toansi(const char *filename_utf8, char **filename)
+{
+ wchar_t *filename_w = NULL;
+ int ret = -1;
+ if (utf8towchar(filename_utf8, &filename_w))
+ return -1;
+
+ if (!filename_w) {
+ *filename = NULL;
+ return 0;
+ }
+
+ ret = wchartoansi(filename_w, filename);
+ av_free(filename_w);
+ return ret;
+}
+
/**
* Checks for extended path prefixes for which normalization needs to be skipped.
* see .NET6: PathInternal.IsExtended()