base/strings/utf_string_conversions.h

   1 // Copyright (c) 2011 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_UTF_STRING_CONVERSIONS_H_
   6 #define BASE_STRINGS_UTF_STRING_CONVERSIONS_H_
   7
   8 #include <string>
   9
  10 #include "base/base_export.h"
  11 #include "base/strings/string16.h"
  12 #include "base/strings/string_piece.h"
  13
  14 namespace base {
  15
  16 // These convert between UTF-8, -16, and -32 strings. They are potentially slow,
  17 // so avoid unnecessary conversions. The low-level versions return a boolean
  18 // indicating whether the conversion was 100% valid. In this case, it will still
  19 // do the best it can and put the result in the output buffer. The versions that
  20 // return strings ignore this error and just return the best conversion
  21 // possible.
  22 BASE_EXPORT bool WideToUTF8(const wchar_t* src, size_t src_len,
  23                             std::string* output);
  24 BASE_EXPORT std::string WideToUTF8(const std::wstring& wide);
  25 BASE_EXPORT bool UTF8ToWide(const char* src, size_t src_len,
  26                             std::wstring* output);
  27 BASE_EXPORT std::wstring UTF8ToWide(StringPiece utf8);
  28
  29 BASE_EXPORT bool WideToUTF16(const wchar_t* src, size_t src_len,
  30                              string16* output);
  31 BASE_EXPORT string16 WideToUTF16(const std::wstring& wide);
  32 BASE_EXPORT bool UTF16ToWide(const char16* src, size_t src_len,
  33                              std::wstring* output);
  34 BASE_EXPORT std::wstring UTF16ToWide(const string16& utf16);
  35
  36 BASE_EXPORT bool UTF8ToUTF16(const char* src, size_t src_len, string16* output);
  37 BASE_EXPORT string16 UTF8ToUTF16(StringPiece utf8);
  38 BASE_EXPORT bool UTF16ToUTF8(const char16* src, size_t src_len,
  39                              std::string* output);
  40 BASE_EXPORT std::string UTF16ToUTF8(StringPiece16 utf16);
  41
  42 // This converts an ASCII string, typically a hardcoded constant, to a UTF16
  43 // string.
  44 BASE_EXPORT string16 ASCIIToUTF16(StringPiece ascii);
  45
  46 // Converts to 7-bit ASCII by truncating. The result must be known to be ASCII
  47 // beforehand.
  48 BASE_EXPORT std::string UTF16ToASCII(StringPiece16 utf16);
  49
  50 }  // namespace base
  51
  52 #endif  // BASE_STRINGS_UTF_STRING_CONVERSIONS_H_