gecko-dev/ipc/glue/StringUtil.cpp

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla IPC.
 *
 * The Initial Developer of the Original Code is
 *   Chris Jones <jones.chris.g@gmail.com>.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * the provisions above, a recipient may use your version of this file under
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 *
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#include "base/string_util.h"

// 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 "base/string_piece.h"
#include "base/string_util.h"

#include "build/build_config.h"

// FIXME/cjones: these really only pertain to the linux sys string
// converters.
#ifdef WCHAR_T_IS_UTF16
#  define ICONV_WCHAR_T_ENCODING "UTF-16"
#else
#  define ICONV_WCHAR_T_ENCODING "WCHAR_T"
#endif

// FIXME/cjones: BIG assumption here that std::string is a good
// container of UTF8-encoded strings.  this is probably wrong, as its
// API doesn't really make sense for UTF8.

namespace base {
string16 SysWideToUTF16(const std::wstring& wide);

// FIXME/cjones: as its name implies, this function is a hack.
template<typename FromType, typename ToType>
ToType
GhettoStringConvert(const FromType& in)
{
  // FIXME/cjones: assumes no non-ASCII characters in |in|
  ToType out;
  out.resize(in.length());
  for (int i = 0; i < static_cast<int>(in.length()); ++i)
      out[i] = static_cast<typename ToType::value_type>(in[i]);
  return out;
}
}

// Implement functions that were in the chromium ICU library, which
// we're not taking.

std::string
WideToUTF8(const std::wstring& wide)
{
    return base::SysWideToUTF8(wide);
}

string16
UTF8ToUTF16(const std::string& utf8)
{
    // FIXME/cjones: do proper conversion
    return base::GhettoStringConvert<std::string, string16>(utf8);
}

std::wstring
UTF8ToWide(const StringPiece& utf8)
{
    return base::SysUTF8ToWide(utf8);
}

string16
WideToUTF16(const std::wstring& wide)
{
    return base::SysWideToUTF16(wide);
}

std::string
UTF16ToUTF8(const string16& utf16)
{
    // FIXME/cjones: do proper conversion
    return base::GhettoStringConvert<string16, std::string>(utf16);
}

namespace base {

// FIXME/cjones: here we're entirely replacing the linux string
// converters, and implementing the one that doesn't exist for OS X.

#ifndef OS_MACOSX
std::string SysWideToUTF8(const std::wstring& wide) {
  // FIXME/cjones: do this with iconv
  return GhettoStringConvert<std::wstring, std::string>(wide);
}
#endif

string16 SysWideToUTF16(const std::wstring& wide)
{
#if defined(WCHAR_T_IS_UTF16)
  return wide;
#else
  // FIXME/cjones: do this with iconv for linux, other for OS X
  return GhettoStringConvert<std::wstring, string16>(wide);
#endif
}

#ifndef OS_MACOSX
std::wstring SysUTF8ToWide(const StringPiece& utf8) {
  // FIXME/cjones: do this with iconv
  return GhettoStringConvert<StringPiece, std::wstring>(utf8);
}

std::string SysWideToNativeMB(const std::wstring& wide) {
  // TODO(evanm): we can't assume Linux is UTF-8.
  return SysWideToUTF8(wide);
}

std::wstring SysNativeMBToWide(const StringPiece& native_mb) {
  // TODO(evanm): we can't assume Linux is UTF-8.
  return SysUTF8ToWide(native_mb);
}
#endif

}  // namespace base