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 <stddef.h>
9 
10 #include <string>
11 
12 #include "base/base_export.h"
13 #include "base/strings/string16.h"
14 #include "base/strings/string_piece.h"
15 
16 namespace base {
17 
18 // These convert between UTF-8, -16, and -32 strings. They are potentially slow,
19 // so avoid unnecessary conversions. The low-level versions return a boolean
20 // indicating whether the conversion was 100% valid. In this case, it will still
21 // do the best it can and put the result in the output buffer. The versions that
22 // return strings ignore this error and just return the best conversion
23 // possible.
24 BASE_EXPORT bool WideToUTF8(const wchar_t* src, size_t src_len,
25                             std::string* output);
26 BASE_EXPORT std::string WideToUTF8(const std::wstring& wide);
27 BASE_EXPORT bool UTF8ToWide(const char* src, size_t src_len,
28                             std::wstring* output);
29 BASE_EXPORT std::wstring UTF8ToWide(StringPiece utf8);
30 
31 BASE_EXPORT bool WideToUTF16(const wchar_t* src, size_t src_len,
32                              string16* output);
33 BASE_EXPORT string16 WideToUTF16(const std::wstring& wide);
34 BASE_EXPORT bool UTF16ToWide(const char16* src, size_t src_len,
35                              std::wstring* output);
36 BASE_EXPORT std::wstring UTF16ToWide(const string16& utf16);
37 
38 BASE_EXPORT bool UTF8ToUTF16(const char* src, size_t src_len, string16* output);
39 BASE_EXPORT string16 UTF8ToUTF16(StringPiece utf8);
40 BASE_EXPORT bool UTF16ToUTF8(const char16* src, size_t src_len,
41                              std::string* output);
42 BASE_EXPORT std::string UTF16ToUTF8(StringPiece16 utf16);
43 
44 // This converts an ASCII string, typically a hardcoded constant, to a UTF16
45 // string.
46 BASE_EXPORT string16 ASCIIToUTF16(StringPiece ascii);
47 
48 // Converts to 7-bit ASCII by truncating. The result must be known to be ASCII
49 // beforehand.
50 BASE_EXPORT std::string UTF16ToASCII(StringPiece16 utf16);
51 
52 }  // namespace base
53 
54 #endif  // BASE_STRINGS_UTF_STRING_CONVERSIONS_H_
55