1// Copyright (c) 2012 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#ifndef BASE_STRINGS_SYS_STRING_CONVERSIONS_H_ 6#define BASE_STRINGS_SYS_STRING_CONVERSIONS_H_ 7 8// Provides system-dependent string type conversions for cases where it's 9// necessary to not use ICU. Generally, you should not need this in Chrome, 10// but it is used in some shared code. Dependencies should be minimal. 11 12#include <string> 13 14#include "base/base_export.h" 15#include "base/basictypes.h" 16#include "base/strings/string16.h" 17#include "base/strings/string_piece.h" 18 19#if defined(OS_MACOSX) 20#include <CoreFoundation/CoreFoundation.h> 21#ifdef __OBJC__ 22@class NSString; 23#else 24class NSString; 25#endif 26#endif // OS_MACOSX 27 28namespace base { 29 30// Converts between wide and UTF-8 representations of a string. On error, the 31// result is system-dependent. 32BASE_EXPORT std::string SysWideToUTF8(const std::wstring& wide); 33BASE_EXPORT std::wstring SysUTF8ToWide(const StringPiece& utf8); 34 35// Converts between wide and the system multi-byte representations of a string. 36// DANGER: This will lose information and can change (on Windows, this can 37// change between reboots). 38BASE_EXPORT std::string SysWideToNativeMB(const std::wstring& wide); 39BASE_EXPORT std::wstring SysNativeMBToWide(const StringPiece& native_mb); 40 41// Windows-specific ------------------------------------------------------------ 42 43#if defined(OS_WIN) 44 45// Converts between 8-bit and wide strings, using the given code page. The 46// code page identifier is one accepted by the Windows function 47// MultiByteToWideChar(). 48BASE_EXPORT std::wstring SysMultiByteToWide(const StringPiece& mb, 49 uint32 code_page); 50BASE_EXPORT std::string SysWideToMultiByte(const std::wstring& wide, 51 uint32 code_page); 52 53#endif // defined(OS_WIN) 54 55// Mac-specific ---------------------------------------------------------------- 56 57#if defined(OS_MACOSX) 58 59// Converts between STL strings and CFStringRefs/NSStrings. 60 61// Creates a string, and returns it with a refcount of 1. You are responsible 62// for releasing it. Returns NULL on failure. 63BASE_EXPORT CFStringRef SysUTF8ToCFStringRef(const std::string& utf8); 64BASE_EXPORT CFStringRef SysUTF16ToCFStringRef(const string16& utf16); 65 66// Same, but returns an autoreleased NSString. 67BASE_EXPORT NSString* SysUTF8ToNSString(const std::string& utf8); 68BASE_EXPORT NSString* SysUTF16ToNSString(const string16& utf16); 69 70// Converts a CFStringRef to an STL string. Returns an empty string on failure. 71BASE_EXPORT std::string SysCFStringRefToUTF8(CFStringRef ref); 72BASE_EXPORT string16 SysCFStringRefToUTF16(CFStringRef ref); 73 74// Same, but accepts NSString input. Converts nil NSString* to the appropriate 75// string type of length 0. 76BASE_EXPORT std::string SysNSStringToUTF8(NSString* ref); 77BASE_EXPORT string16 SysNSStringToUTF16(NSString* ref); 78 79#endif // defined(OS_MACOSX) 80 81} // namespace base 82 83#endif // BASE_STRINGS_SYS_STRING_CONVERSIONS_H_ 84