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Side by Side Diff: base/string16.cc

Issue 3119022: Header cleanup in base.... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 10 years, 4 months ago
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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "base/string16.h" 5 #include "base/string16.h"
6 6
7 #if defined(WCHAR_T_IS_UTF16) 7 #if defined(WCHAR_T_IS_UTF16)
8 8
9 #error This file should not be used on 2-byte wchar_t systems 9 #error This file should not be used on 2-byte wchar_t systems
10 // If this winds up being needed on 2-byte wchar_t systems, either the 10 // If this winds up being needed on 2-byte wchar_t systems, either the
11 // definitions below can be used, or the host system's wide character 11 // definitions below can be used, or the host system's wide character
12 // functions like wmemcmp can be wrapped. 12 // functions like wmemcmp can be wrapped.
13 13
14 #elif defined(WCHAR_T_IS_UTF32) 14 #elif defined(WCHAR_T_IS_UTF32)
15 15
16 #include "base/string_util.h"
17 #include "base/utf_string_conversions.h" 16 #include "base/utf_string_conversions.h"
18 17
19 namespace base { 18 namespace base {
20 19
21 int c16memcmp(const char16* s1, const char16* s2, size_t n) { 20 int c16memcmp(const char16* s1, const char16* s2, size_t n) {
22 // We cannot call memcmp because that changes the semantics. 21 // We cannot call memcmp because that changes the semantics.
23 while (n-- > 0) { 22 while (n-- > 0) {
24 if (*s1 != *s2) { 23 if (*s1 != *s2) {
25 // We cannot use (*s1 - *s2) because char16 is unsigned. 24 // We cannot use (*s1 - *s2) because char16 is unsigned.
26 return ((*s1 < *s2) ? -1 : 1); 25 return ((*s1 < *s2) ? -1 : 1);
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68 67
69 } // namespace base 68 } // namespace base
70 69
71 template class std::basic_string<char16, base::string16_char_traits>; 70 template class std::basic_string<char16, base::string16_char_traits>;
72 71
73 std::ostream& operator<<(std::ostream& out, const string16& str) { 72 std::ostream& operator<<(std::ostream& out, const string16& str) {
74 return out << UTF16ToUTF8(str); 73 return out << UTF16ToUTF8(str);
75 } 74 }
76 75
77 #endif // WCHAR_T_IS_UTF32 76 #endif // WCHAR_T_IS_UTF32
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