The Tor Browser: ipc/chromium/src/base/string16.cc@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.

     2 // Use of this source code is governed by a BSD-style license that can be

     3 // found in the LICENSE file.

     5 #include "base/string16.h"

     7 #if defined(WCHAR_T_IS_UTF16)

     9 #error This file should not be used on 2-byte wchar_t systems

    10 // If this winds up being needed on 2-byte wchar_t systems, either the

    11 // definitions below can be used, or the host system's wide character

    12 // functions like wmemcmp can be wrapped.

    14 #elif defined(WCHAR_T_IS_UTF32)

    16 #include "base/string_util.h"

    18 namespace base {

    20 int c16memcmp(const char16* s1, const char16* s2, size_t n) {

    21   // We cannot call memcmp because that changes the semantics.

    22   while (n-- > 0) {

    23     if (*s1 != *s2) {

    24       // We cannot use (*s1 - *s2) because char16 is unsigned.

    25       return ((*s1 < *s2) ? -1 : 1);

    26     }

    27     ++s1;

    28     ++s2;

    29   }

    30   return 0;

    31 }

    33 size_t c16len(const char16* s) {

    34   const char16 *s_orig = s;

    35   while (*s) {

    36     ++s;

    37   }

    38   return s - s_orig;

    39 }

    41 const char16* c16memchr(const char16* s, char16 c, size_t n) {

    42   while (n-- > 0) {

    43     if (*s == c) {

    44       return s;

    45     }

    46     ++s;

    47   }

    48   return 0;

    49 }

    51 char16* c16memmove(char16* s1, const char16* s2, size_t n) {

    52   return reinterpret_cast<char16*>(memmove(s1, s2, n * sizeof(char16)));

    53 }

    55 char16* c16memcpy(char16* s1, const char16* s2, size_t n) {

    56   return reinterpret_cast<char16*>(memcpy(s1, s2, n * sizeof(char16)));

    57 }

    59 char16* c16memset(char16* s, char16 c, size_t n) {

    60   char16 *s_orig = s;

    61   while (n-- > 0) {

    62     *s = c;

    63     ++s;

    64   }

    65   return s_orig;

    66 }

    68 }  // namespace base

    70 template class std::basic_string<char16, base::string16_char_traits>;

    72 #endif  // WCHAR_T_IS_UTF32

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