83 lines
1.8 KiB
C++
83 lines
1.8 KiB
C++
// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/strings/string16.h"
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#if defined(WCHAR_T_IS_UTF16)
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#error This file should not be used on 2-byte wchar_t systems
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// If this winds up being needed on 2-byte wchar_t systems, either the
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// definitions below can be used, or the host system's wide character
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// functions like wmemcmp can be wrapped.
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#elif defined(WCHAR_T_IS_UTF32)
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#include <ostream>
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#include "base/strings/utf_string_conversions.h"
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namespace base {
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int c16memcmp(const char16* s1, const char16* s2, size_t n) {
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// We cannot call memcmp because that changes the semantics.
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while (n-- > 0) {
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if (*s1 != *s2) {
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// We cannot use (*s1 - *s2) because char16 is unsigned.
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return ((*s1 < *s2) ? -1 : 1);
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}
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++s1;
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++s2;
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}
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return 0;
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}
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size_t c16len(const char16* s) {
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const char16 *s_orig = s;
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while (*s) {
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++s;
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}
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return s - s_orig;
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}
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const char16* c16memchr(const char16* s, char16 c, size_t n) {
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while (n-- > 0) {
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if (*s == c) {
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return s;
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}
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++s;
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}
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return 0;
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}
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char16* c16memmove(char16* s1, const char16* s2, size_t n) {
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return static_cast<char16*>(memmove(s1, s2, n * sizeof(char16)));
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}
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char16* c16memcpy(char16* s1, const char16* s2, size_t n) {
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return static_cast<char16*>(memcpy(s1, s2, n * sizeof(char16)));
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}
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char16* c16memset(char16* s, char16 c, size_t n) {
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char16 *s_orig = s;
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while (n-- > 0) {
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*s = c;
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++s;
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}
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return s_orig;
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}
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std::ostream& operator<<(std::ostream& out, const string16& str) {
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return out << UTF16ToUTF8(str);
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}
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void PrintTo(const string16& str, std::ostream* out) {
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*out << str;
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}
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} // namespace base
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template class std::basic_string<char16, base::string16_char_traits>;
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#endif // WCHAR_T_IS_UTF32
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