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      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
     71