+#if defined(__MINGW32CE__)
+#define mkdir(a, b) _mkdir(a)
+#elif defined(_WIN32)
+#include <stdio.h>
+#include <windows.h>
+#include "libavutil/wchar_filename.h"
+
+#define DEF_FS_FUNCTION(name, wfunc, afunc) \
+static inline int win32_##name(const char *filename_utf8) \
+{ \
+ wchar_t *filename_w; \
+ int ret; \
+ \
+ if (utf8towchar(filename_utf8, &filename_w)) \
+ return -1; \
+ if (!filename_w) \
+ goto fallback; \
+ \
+ ret = wfunc(filename_w); \
+ av_free(filename_w); \
+ return ret; \
+ \
+fallback: \
+ /* filename may be be in CP_ACP */ \
+ return afunc(filename_utf8); \
+}
+
+DEF_FS_FUNCTION(unlink, _wunlink, _unlink)
+DEF_FS_FUNCTION(mkdir, _wmkdir, _mkdir)
+DEF_FS_FUNCTION(rmdir, _wrmdir , _rmdir)
+
+static inline int win32_rename(const char *src_utf8, const char *dest_utf8)
+{
+ wchar_t *src_w, *dest_w;
+ int ret;
+
+ if (utf8towchar(src_utf8, &src_w))
+ return -1;
+ if (utf8towchar(dest_utf8, &dest_w)) {
+ av_free(src_w);
+ return -1;
+ }
+ if (!src_w || !dest_w) {
+ av_free(src_w);
+ av_free(dest_w);
+ goto fallback;
+ }
+
+ ret = MoveFileExW(src_w, dest_w, MOVEFILE_REPLACE_EXISTING);
+ av_free(src_w);
+ av_free(dest_w);
+ // Lacking proper mapping from GetLastError() error codes to errno codes
+ if (ret)
+ errno = EPERM;
+ return ret;
+
+fallback:
+ /* filename may be be in CP_ACP */
+#if HAVE_MOVEFILEEXA
+ ret = MoveFileExA(src_utf8, dest_utf8, MOVEFILE_REPLACE_EXISTING);
+ if (ret)
+ errno = EPERM;
+#else
+ /* Windows Phone doesn't have MoveFileExA. However, it's unlikely
+ * that anybody would input filenames in CP_ACP there, so this
+ * fallback is kept mostly for completeness. Alternatively we could
+ * do MultiByteToWideChar(CP_ACP) and use MoveFileExW, but doing
+ * explicit conversions with CP_ACP is allegedly forbidden in windows
+ * store apps (or windows phone), and the notion of a native code page
+ * doesn't make much sense there. */
+ ret = rename(src_utf8, dest_utf8);
+#endif
+ return ret;
+}
+
+#define mkdir(a, b) win32_mkdir(a)
+#define rename win32_rename
+#define rmdir win32_rmdir
+#define unlink win32_unlink
+
+#endif
+