1 // Copyright 2012 The Chromium Authors 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/string_piece.h" 18 #include "build/build_config.h" 19 20 #if BUILDFLAG(IS_APPLE) 21 #include <CoreFoundation/CoreFoundation.h> 22 23 #include "base/apple/scoped_cftyperef.h" 24 25 #ifdef __OBJC__ 26 @class NSString; 27 #endif 28 #endif // BUILDFLAG(IS_APPLE) 29 30 namespace base { 31 32 // Converts between wide and UTF-8 representations of a string. On error, the 33 // result is system-dependent. 34 [[nodiscard]] BASE_EXPORT std::string SysWideToUTF8(const std::wstring& wide); 35 [[nodiscard]] BASE_EXPORT std::wstring SysUTF8ToWide(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). 40 [[nodiscard]] BASE_EXPORT std::string SysWideToNativeMB( 41 const std::wstring& wide); 42 [[nodiscard]] BASE_EXPORT std::wstring SysNativeMBToWide(StringPiece native_mb); 43 44 // Windows-specific ------------------------------------------------------------ 45 46 #if BUILDFLAG(IS_WIN) 47 48 // Converts between 8-bit and wide strings, using the given code page. The 49 // code page identifier is one accepted by the Windows function 50 // MultiByteToWideChar(). 51 [[nodiscard]] BASE_EXPORT std::wstring SysMultiByteToWide(StringPiece mb, 52 uint32_t code_page); 53 [[nodiscard]] BASE_EXPORT std::string SysWideToMultiByte( 54 const std::wstring& wide, 55 uint32_t code_page); 56 57 #endif // BUILDFLAG(IS_WIN) 58 59 // Mac-specific ---------------------------------------------------------------- 60 61 #if BUILDFLAG(IS_APPLE) 62 63 // Converts between strings and CFStringRefs/NSStrings. 64 65 // Converts a string to a CFStringRef. Returns null on failure. 66 [[nodiscard]] BASE_EXPORT apple::ScopedCFTypeRef<CFStringRef> 67 SysUTF8ToCFStringRef(StringPiece utf8); 68 [[nodiscard]] BASE_EXPORT apple::ScopedCFTypeRef<CFStringRef> 69 SysUTF16ToCFStringRef(StringPiece16 utf16); 70 71 // Converts a CFStringRef to a string. Returns an empty string on failure. It is 72 // not valid to call these with a null `ref`. 73 [[nodiscard]] BASE_EXPORT std::string SysCFStringRefToUTF8(CFStringRef ref); 74 [[nodiscard]] BASE_EXPORT std::u16string SysCFStringRefToUTF16(CFStringRef ref); 75 76 #ifdef __OBJC__ 77 78 // Converts a string to an autoreleased NSString. Returns nil on failure. 79 [[nodiscard]] BASE_EXPORT NSString* SysUTF8ToNSString(StringPiece utf8); 80 [[nodiscard]] BASE_EXPORT NSString* SysUTF16ToNSString(StringPiece16 utf16); 81 82 // Converts an NSString to a string. Returns an empty string on failure or if 83 // `ref` is nil. 84 [[nodiscard]] BASE_EXPORT std::string SysNSStringToUTF8(NSString* ref); 85 [[nodiscard]] BASE_EXPORT std::u16string SysNSStringToUTF16(NSString* ref); 86 87 #endif // __OBJC__ 88 89 #endif // BUILDFLAG(IS_APPLE) 90 91 } // namespace base 92 93 #endif // BASE_STRINGS_SYS_STRING_CONVERSIONS_H_ 94