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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "base/string16.h"
#ifdef WIN32
#error This file should not be used on 2-byte wchar_t systems
// If this winds up being needed on 2-byte wchar_t systems, either the
// definitions below can be used, or the host system's wide character
// functions like wmemcmp can be wrapped.
#else // !WIN32
namespace base {
int c16memcmp(const char16* s1, const char16* s2, size_t n) {
// We cannot call memcmp because that changes the semantics.
while (n-- > 0) {
if (*s1 != *s2) {
// We cannot use (*s1 - *s2) because char16 is unsigned.
return ((*s1 < *s2) ? -1 : 1);
}
++s1;
++s2;
}
return 0;
}
size_t c16len(const char16* s) {
const char16 *s_orig = s;
while (*s) {
++s;
}
return s - s_orig;
}
const char16* c16memchr(const char16* s, char16 c, size_t n) {
while (n-- > 0) {
if (*s == c) {
return s;
}
++s;
}
return 0;
}
char16* c16memmove(char16* s1, const char16* s2, size_t n) {
return reinterpret_cast<char16*>(memmove(s1, s2, n * sizeof(char16)));
}
char16* c16memcpy(char16* s1, const char16* s2, size_t n) {
return reinterpret_cast<char16*>(memcpy(s1, s2, n * sizeof(char16)));
}
char16* c16memset(char16* s, char16 c, size_t n) {
char16 *s_orig = s;
while (n-- > 0) {
*s = c;
++s;
}
return s_orig;
}
} // namespace base
template class std::basic_string<char16, base::string16_char_traits>;
#endif // WIN32
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