base/sys_string_conversions_win.cc

   1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/sys_string_conversions.h"
   6
   7 #include <windows.h>
   8
   9 #include "base/string_piece.h"
  10
  11 namespace base {
  12
  13 // Do not assert in this function since it is used by the asssertion code!
  14 std::string SysWideToUTF8(const std::wstring& wide) {
  15   return SysWideToMultiByte(wide, CP_UTF8);
  16 }
  17
  18 // Do not assert in this function since it is used by the asssertion code!
  19 std::wstring SysUTF8ToWide(const StringPiece& utf8) {
  20   return SysMultiByteToWide(utf8, CP_UTF8);
  21 }
  22
  23 std::string SysWideToNativeMB(const std::wstring& wide) {
  24   return SysWideToMultiByte(wide, CP_ACP);
  25 }
  26
  27 std::wstring SysNativeMBToWide(const StringPiece& native_mb) {
  28   return SysMultiByteToWide(native_mb, CP_ACP);
  29 }
  30
  31 // Do not assert in this function since it is used by the asssertion code!
  32 std::wstring SysMultiByteToWide(const StringPiece& mb, uint32 code_page) {
  33   if (mb.empty())
  34     return std::wstring();
  35
  36   int mb_length = static_cast<int>(mb.length());
  37   // Compute the length of the buffer.
  38   int charcount = MultiByteToWideChar(code_page, 0,
  39                                       mb.data(), mb_length, NULL, 0);
  40   if (charcount == 0)
  41     return std::wstring();
  42
  43   std::wstring wide;
  44   wide.resize(charcount);
  45   MultiByteToWideChar(code_page, 0, mb.data(), mb_length, &wide[0], charcount);
  46
  47   return wide;
  48 }
  49
  50 // Do not assert in this function since it is used by the asssertion code!
  51 std::string SysWideToMultiByte(const std::wstring& wide, uint32 code_page) {
  52   int wide_length = static_cast<int>(wide.length());
  53   if (wide_length == 0)
  54     return std::string();
  55
  56   // Compute the length of the buffer we'll need.
  57   int charcount = WideCharToMultiByte(code_page, 0, wide.data(), wide_length,
  58                                       NULL, 0, NULL, NULL);
  59   if (charcount == 0)
  60     return std::string();
  61
  62   std::string mb;
  63   mb.resize(charcount);
  64   WideCharToMultiByte(code_page, 0, wide.data(), wide_length,
  65                       &mb[0], charcount, NULL, NULL);
  66
  67   return mb;
  68 }
  69
  70 }  // namespace base