D605: Fixes for proper handling of wchar_t paths in MinGW.

* Fixed different not-in-sync #ifdef blocks for struct stat variants under Windows.

Comments have been left to indicate the portions of BLI_fileops.h and
BLI_fileops_types.h that need to stay in sync.

* Added BLI_wstat() to de-duplicate #ifdef blocks for stat() variants on Windows.

* Fix for opendir() and associate functions in MinGW not working properly with
non-ASCII, MBCS-compatible paths.

MinGW (FREE_WINDOWS) has opendir() and _wopendir(), and only the
latter accepts a path name of wchar_t type. Rather than messing up with
extra #ifdef's here and there, Blender's own implementations of opendir()
and related functions are used to properly support paths with non-ASCII,
MBCS-compatible characters.

Tested with MSVC 2013 Express, MinGW32 (gcc 4.6.2) and MinGW-w64 (gcc 4.7.1).


Differential Revision: https://developer.blender.org/D605

Reviewed By: campbellbarton

source/blender/blenlib/BLI_fileops.h

@@ -60,17 +60,23 @@ int    BLI_delete(const char *path, bool dir, bool recursive);
 int    BLI_move(const char *path, const char *to);
 int    BLI_create_symlink(const char *path, const char *to);
 
+/* keep in sync with the definition of struct direntry in BLI_fileops_types.h */
 #ifdef WIN32
-#  ifndef __MINGW64__
+#  if (defined(_MSC_VER) && (_MSC_VER >= 1500)) || defined(__MINGW64__)
 typedef struct _stat64 BLI_stat_t;
+#  elif defined(__MINGW32__)
+typedef struct _stati64 BLI_stat_t;
 #  else
-typedef struct stat BLI_stat_t;
-#endif
+typedef struct _stat BLI_stat_t;
+#  endif
 #else
 typedef struct stat BLI_stat_t;
 #endif
 
 int    BLI_stat(const char *path, BLI_stat_t *buffer);
+#ifdef WIN32
+int    BLI_wstat(const wchar_t *path, BLI_stat_t *buffer);
+#endif
 
 /* Directories */