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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/strings/string16.h"
#if defined(WCHAR_T_IS_UTF16) && !defined(_AIX)
#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.
#elif defined(WCHAR_T_IS_UTF32)
#include <ostream>
#include "base/strings/string_piece.h"
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 nullptr;
}
char16* c16memmove(char16* s1, const char16* s2, size_t n) {
return static_cast<char16*>(memmove(s1, s2, n * sizeof(char16)));
}
char16* c16memcpy(char16* s1, const char16* s2, size_t n) {
return static_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 string16_internals {
std::ostream& operator<<(std::ostream& out, const string16& str) {
return out << base::StringPiece16(str);
}
void PrintTo(const string16& str, std::ostream* out) {
*out << str;
}
} // namespace string16_internals
} // namespace base
template class std::
basic_string<base::char16, base::string16_internals::string16_char_traits>;
#endif // WCHAR_T_IS_UTF32
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