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 <stdint.h> 13 14#include <string> 15 16#include "base/base_export.h" 17#include "base/strings/string16.h" 18#include "base/strings/string_piece.h" 19#include "build/build_config.h" 20 21#if defined(OS_MACOSX) 22#include <CoreFoundation/CoreFoundation.h> 23#ifdef __OBJC__ 24@class NSString; 25#else 26class NSString; 27#endif 28#endif // OS_MACOSX 29 30namespace base { 31 32// Converts between wide and UTF-8 representations of a string. On error, the 33// result is system-dependent. 34BASE_EXPORT std::string SysWideToUTF8(const std::wstring& wide); 35BASE_EXPORT std::wstring SysUTF8ToWide(const StringPiece& utf8); 36 37// Converts between wide and the system multi-byte representations of a string. 38// DANGER: This will lose information and can change (on Windows, this can 39// change between reboots). 40BASE_EXPORT std::string SysWideToNativeMB(const std::wstring& wide); 41BASE_EXPORT std::wstring SysNativeMBToWide(const StringPiece& native_mb); 42 43// Windows-specific ------------------------------------------------------------ 44 45#if defined(OS_WIN) 46 47// Converts between 8-bit and wide strings, using the given code page. The 48// code page identifier is one accepted by the Windows function 49// MultiByteToWideChar(). 50BASE_EXPORT std::wstring SysMultiByteToWide(const StringPiece& mb, 51 uint32_t code_page); 52BASE_EXPORT std::string SysWideToMultiByte(const std::wstring& wide, 53 uint32_t code_page); 54 55#endif // defined(OS_WIN) 56 57// Mac-specific ---------------------------------------------------------------- 58 59#if defined(OS_MACOSX) 60 61// Converts between STL strings and CFStringRefs/NSStrings. 62 63// Creates a string, and returns it with a refcount of 1. You are responsible 64// for releasing it. Returns NULL on failure. 65BASE_EXPORT CFStringRef SysUTF8ToCFStringRef(const std::string& utf8); 66BASE_EXPORT CFStringRef SysUTF16ToCFStringRef(const string16& utf16); 67 68// Same, but returns an autoreleased NSString. 69BASE_EXPORT NSString* SysUTF8ToNSString(const std::string& utf8); 70BASE_EXPORT NSString* SysUTF16ToNSString(const string16& utf16); 71 72// Converts a CFStringRef to an STL string. Returns an empty string on failure. 73BASE_EXPORT std::string SysCFStringRefToUTF8(CFStringRef ref); 74BASE_EXPORT string16 SysCFStringRefToUTF16(CFStringRef ref); 75 76// Same, but accepts NSString input. Converts nil NSString* to the appropriate 77// string type of length 0. 78BASE_EXPORT std::string SysNSStringToUTF8(NSString* ref); 79BASE_EXPORT string16 SysNSStringToUTF16(NSString* ref); 80 81#endif // defined(OS_MACOSX) 82 83} // namespace base 84 85#endif // BASE_STRINGS_SYS_STRING_CONVERSIONS_H_ 86