Move sys_string_conversions to base/strings.

base/sys_string_conversions_win.cc

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "base/sys_string_conversions.h"
-
-#include <windows.h>
-
-#include "base/string_piece.h"
-
-namespace base {
-
-// Do not assert in this function since it is used by the asssertion code!
-std::string SysWideToUTF8(const std::wstring& wide) {
-  return SysWideToMultiByte(wide, CP_UTF8);
-}
-
-// Do not assert in this function since it is used by the asssertion code!
-std::wstring SysUTF8ToWide(const StringPiece& utf8) {
-  return SysMultiByteToWide(utf8, CP_UTF8);
-}
-
-std::string SysWideToNativeMB(const std::wstring& wide) {
-  return SysWideToMultiByte(wide, CP_ACP);
-}
-
-std::wstring SysNativeMBToWide(const StringPiece& native_mb) {
-  return SysMultiByteToWide(native_mb, CP_ACP);
-}
-
-// Do not assert in this function since it is used by the asssertion code!
-std::wstring SysMultiByteToWide(const StringPiece& mb, uint32 code_page) {
-  if (mb.empty())
-    return std::wstring();
-
-  int mb_length = static_cast<int>(mb.length());
-  // Compute the length of the buffer.
-  int charcount = MultiByteToWideChar(code_page, 0,
-                                      mb.data(), mb_length, NULL, 0);
-  if (charcount == 0)
-    return std::wstring();
-
-  std::wstring wide;
-  wide.resize(charcount);
-  MultiByteToWideChar(code_page, 0, mb.data(), mb_length, &wide[0], charcount);
-
-  return wide;
-}
-
-// Do not assert in this function since it is used by the asssertion code!
-std::string SysWideToMultiByte(const std::wstring& wide, uint32 code_page) {
-  int wide_length = static_cast<int>(wide.length());
-  if (wide_length == 0)
-    return std::string();
-
-  // Compute the length of the buffer we'll need.
-  int charcount = WideCharToMultiByte(code_page, 0, wide.data(), wide_length,
-                                      NULL, 0, NULL, NULL);
-  if (charcount == 0)
-    return std::string();
-
-  std::string mb;
-  mb.resize(charcount);
-  WideCharToMultiByte(code_page, 0, wide.data(), wide_length,
-                      &mb[0], charcount, NULL, NULL);
-
-  return mb;
-}
-
-}  // namespace base