io_win32: support non-ASCII paths

Fixes https://github.com/google/protobuf/issues/3951

1 files changed, 16 insertions, 2 deletions

diff --git a/src/google/protobuf/stubs/io_win32.h b/src/google/protobuf/stubs/io_win32.h
index 53160089..60d0ceb6 100644
--- a/src/google/protobuf/stubs/io_win32.h
+++ b/src/google/protobuf/stubs/io_win32.h
@@ -69,8 +69,22 @@ LIBPROTOBUF_EXPORT int read(int fd, void* buffer, size_t size);
 LIBPROTOBUF_EXPORT int setmode(int fd, int mode);
 LIBPROTOBUF_EXPORT int stat(const char* path, struct _stat* buffer);
 LIBPROTOBUF_EXPORT int write(int fd, const void* buffer, size_t size);
-LIBPROTOBUF_EXPORT std::wstring testonly_path_to_winpath(
-    const std::string& path);
+LIBPROTOBUF_EXPORT std::wstring testonly_utf8_to_winpath(const char* path);
+
+namespace strings {
+
+// Convert from UTF-16 to Active-Code-Page-encoded or to UTF-8-encoded text.
+LIBPROTOBUF_EXPORT bool wcs_to_mbs(
+    const wchar_t* s, std::string* out, bool outUtf8);
+
+// Convert from Active-Code-Page-encoded or UTF-8-encoded text to UTF-16.
+LIBPROTOBUF_EXPORT bool mbs_to_wcs(
+    const char* s, std::wstring* out, bool inUtf8);
+
+// Convert from UTF-8-encoded text to UTF-16.
+LIBPROTOBUF_EXPORT bool utf8_to_wcs(const char* input, std::wstring* out);
+
+}  // namespace strings
 
 }  // namespace win32
 }  // namespace internal