1// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. 2// 3// Redistribution and use in source and binary forms, with or without 4// modification, are permitted provided that the following conditions are 5// met: 6// 7// * Redistributions of source code must retain the above copyright 8// notice, this list of conditions and the following disclaimer. 9// * Redistributions in binary form must reproduce the above 10// copyright notice, this list of conditions and the following disclaimer 11// in the documentation and/or other materials provided with the 12// distribution. 13// * Neither the name of Google Inc. nor the names of its 14// contributors may be used to endorse or promote products derived from 15// this software without specific prior written permission. 16// 17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29#include "base/string16.h" 30 31#ifdef WIN32 32 33#error This file should not be used on 2-byte wchar_t systems 34// If this winds up being needed on 2-byte wchar_t systems, either the 35// definitions below can be used, or the host system's wide character 36// functions like wmemcmp can be wrapped. 37 38#else // !WIN32 39 40namespace base { 41 42int c16memcmp(const char16* s1, const char16* s2, size_t n) { 43 // We cannot call memcmp because that changes the semantics. 44 while (n-- > 0) { 45 if (*s1 != *s2) { 46 // We cannot use (*s1 - *s2) because char16 is unsigned. 47 return ((*s1 < *s2) ? -1 : 1); 48 } 49 ++s1; 50 ++s2; 51 } 52 return 0; 53} 54 55size_t c16len(const char16* s) { 56 const char16 *s_orig = s; 57 while (*s) { 58 ++s; 59 } 60 return s - s_orig; 61} 62 63const char16* c16memchr(const char16* s, char16 c, size_t n) { 64 while (n-- > 0) { 65 if (*s == c) { 66 return s; 67 } 68 ++s; 69 } 70 return 0; 71} 72 73char16* c16memmove(char16* s1, const char16* s2, size_t n) { 74 return reinterpret_cast<char16*>(memmove(s1, s2, n * sizeof(char16))); 75} 76 77char16* c16memcpy(char16* s1, const char16* s2, size_t n) { 78 return reinterpret_cast<char16*>(memcpy(s1, s2, n * sizeof(char16))); 79} 80 81char16* c16memset(char16* s, char16 c, size_t n) { 82 char16 *s_orig = s; 83 while (n-- > 0) { 84 *s = c; 85 ++s; 86 } 87 return s_orig; 88} 89 90} // namespace base 91 92template class std::basic_string<char16, base::string16_char_traits>; 93 94#endif // WIN32 95