1c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// Copyright (c) 2009 The Chromium Authors. All rights reserved. 2c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// Use of this source code is governed by a BSD-style license that can be 3c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// found in the LICENSE file. 4c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 5c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/string16.h" 6c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 7c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#if defined(WCHAR_T_IS_UTF16) 8c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 9c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#error This file should not be used on 2-byte wchar_t systems 10c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// If this winds up being needed on 2-byte wchar_t systems, either the 11c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// definitions below can be used, or the host system's wide character 12c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// functions like wmemcmp can be wrapped. 13c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 14c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#elif defined(WCHAR_T_IS_UTF32) 15c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 16731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick#include <ostream> 17731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick 18c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/utf_string_conversions.h" 19c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 20c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottnamespace base { 21c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 22c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottint c16memcmp(const char16* s1, const char16* s2, size_t n) { 23c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We cannot call memcmp because that changes the semantics. 24c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott while (n-- > 0) { 25c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (*s1 != *s2) { 26c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We cannot use (*s1 - *s2) because char16 is unsigned. 27c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return ((*s1 < *s2) ? -1 : 1); 28c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 29c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ++s1; 30c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ++s2; 31c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 32c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return 0; 33c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 34c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 35c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottsize_t c16len(const char16* s) { 36c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott const char16 *s_orig = s; 37c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott while (*s) { 38c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ++s; 39c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 40c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return s - s_orig; 41c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 42c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 43c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottconst char16* c16memchr(const char16* s, char16 c, size_t n) { 44c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott while (n-- > 0) { 45c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (*s == c) { 46c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return s; 47c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 48c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ++s; 49c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 50c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return 0; 51c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 52c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 53c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottchar16* c16memmove(char16* s1, const char16* s2, size_t n) { 54c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return reinterpret_cast<char16*>(memmove(s1, s2, n * sizeof(char16))); 55c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 56c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 57c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottchar16* c16memcpy(char16* s1, const char16* s2, size_t n) { 58c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return reinterpret_cast<char16*>(memcpy(s1, s2, n * sizeof(char16))); 59c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 60c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 61c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottchar16* c16memset(char16* s, char16 c, size_t n) { 62c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott char16 *s_orig = s; 63c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott while (n-- > 0) { 64c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott *s = c; 65c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ++s; 66c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 67c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return s_orig; 68c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 69c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 70c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} // namespace base 71c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 72c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scotttemplate class std::basic_string<char16, base::string16_char_traits>; 73c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 74731df977c0511bca2206b5f333555b1205ff1f43Iain Merricknamespace base { 75c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottstd::ostream& operator<<(std::ostream& out, const string16& str) { 76c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return out << UTF16ToUTF8(str); 77c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 78731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick} 79c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 80c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#endif // WCHAR_T_IS_UTF32 81