ipc/glue/StringUtil.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "base/string_util.h"
   8
   9 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
  10 // Use of this source code is governed by a BSD-style license that can be
  11 // found in the LICENSE file.
  12
  13 #include "base/sys_string_conversions.h"
  14
  15 #include "base/string_piece.h"
  16 #include "base/string_util.h"
  17
  18 // FIXME/cjones: these really only pertain to the linux sys string
  19 // converters.
  20 #ifdef XP_WIN
  21 #  define ICONV_WCHAR_T_ENCODING "UTF-16"
  22 #else
  23 #  define ICONV_WCHAR_T_ENCODING "WCHAR_T"
  24 #endif
  25
  26 // FIXME/cjones: BIG assumption here that std::string is a good
  27 // container of UTF8-encoded strings.  this is probably wrong, as its
  28 // API doesn't really make sense for UTF8.
  29
  30 namespace base {
  31
  32 // FIXME/cjones: as its name implies, this function is a hack.
  33 template <typename FromType, typename ToType>
  34 ToType HackyStringConvert(const FromType& in) {
  35   // FIXME/cjones: assumes no non-ASCII characters in |in|
  36   ToType out;
  37   out.resize(in.length());
  38   for (int i = 0; i < static_cast<int>(in.length()); ++i)
  39     out[i] = static_cast<typename ToType::value_type>(in[i]);
  40   return out;
  41 }
  42
  43 }  // namespace base
  44
  45 // Implement functions that were in the chromium ICU library, which
  46 // we're not taking.
  47
  48 std::string WideToUTF8(const std::wstring& wide) {
  49   return base::SysWideToUTF8(wide);
  50 }
  51
  52 std::wstring UTF8ToWide(const StringPiece& utf8) {
  53   return base::SysUTF8ToWide(utf8);
  54 }
  55
  56 namespace base {
  57
  58 // FIXME/cjones: here we're entirely replacing the linux string
  59 // converters, and implementing the one that doesn't exist for OS X
  60 // and Windows.
  61
  62 #if !defined(XP_DARWIN) && !defined(XP_WIN)
  63 std::string SysWideToUTF8(const std::wstring& wide) {
  64   // FIXME/cjones: do this with iconv
  65   return HackyStringConvert<std::wstring, std::string>(wide);
  66 }
  67 #endif
  68
  69 #if !defined(XP_DARWIN) && !defined(XP_WIN)
  70 std::wstring SysUTF8ToWide(const StringPiece& utf8) {
  71   // FIXME/cjones: do this with iconv
  72   return HackyStringConvert<StringPiece, std::wstring>(utf8);
  73 }
  74
  75 std::string SysWideToNativeMB(const std::wstring& wide) {
  76   // TODO(evanm): we can't assume Linux is UTF-8.
  77   return SysWideToUTF8(wide);
  78 }
  79
  80 std::wstring SysNativeMBToWide(const StringPiece& native_mb) {
  81   // TODO(evanm): we can't assume Linux is UTF-8.
  82   return SysUTF8ToWide(native_mb);
  83 }
  84 #endif
  85
  86 }  // namespace base