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| 1 // Copyright 2013 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. | |
| 4 | |
| 5 #include "base/strings/string16.h" | |
| 6 | |
| 7 #if defined(WCHAR_T_IS_UTF16) | |
| 8 | |
| 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. | |
| 13 | |
| 14 #elif defined(WCHAR_T_IS_UTF32) | |
| 15 | |
| 16 #include <ostream> | |
| 17 | |
| 18 #include "base/strings/utf_string_conversions.h" | |
| 19 | |
| 20 namespace base { | |
| 21 | |
| 22 int c16memcmp(const char16* s1, const char16* s2, size_t n) { | |
| 23 // We cannot call memcmp because that changes the semantics. | |
| 24 while (n-- > 0) { | |
| 25 if (*s1 != *s2) { | |
| 26 // We cannot use (*s1 - *s2) because char16 is unsigned. | |
| 27 return ((*s1 < *s2) ? -1 : 1); | |
| 28 } | |
| 29 ++s1; | |
| 30 ++s2; | |
| 31 } | |
| 32 return 0; | |
| 33 } | |
| 34 | |
| 35 size_t c16len(const char16* s) { | |
| 36 const char16 *s_orig = s; | |
| 37 while (*s) { | |
| 38 ++s; | |
| 39 } | |
| 40 return s - s_orig; | |
| 41 } | |
| 42 | |
| 43 const char16* c16memchr(const char16* s, char16 c, size_t n) { | |
| 44 while (n-- > 0) { | |
| 45 if (*s == c) { | |
| 46 return s; | |
| 47 } | |
| 48 ++s; | |
| 49 } | |
| 50 return 0; | |
| 51 } | |
| 52 | |
| 53 char16* c16memmove(char16* s1, const char16* s2, size_t n) { | |
| 54 return static_cast<char16*>(memmove(s1, s2, n * sizeof(char16))); | |
| 55 } | |
| 56 | |
| 57 char16* c16memcpy(char16* s1, const char16* s2, size_t n) { | |
| 58 return static_cast<char16*>(memcpy(s1, s2, n * sizeof(char16))); | |
| 59 } | |
| 60 | |
| 61 char16* c16memset(char16* s, char16 c, size_t n) { | |
| 62 char16 *s_orig = s; | |
| 63 while (n-- > 0) { | |
| 64 *s = c; | |
| 65 ++s; | |
| 66 } | |
| 67 return s_orig; | |
| 68 } | |
| 69 | |
| 70 std::ostream& operator<<(std::ostream& out, const string16& str) { | |
| 71 return out << UTF16ToUTF8(str); | |
| 72 } | |
| 73 | |
| 74 void PrintTo(const string16& str, std::ostream* out) { | |
| 75 *out << str; | |
| 76 } | |
| 77 | |
| 78 } // namespace base | |
| 79 | |
| 80 template class std::basic_string<base::char16, base::string16_char_traits>; | |
| 81 | |
| 82 #endif // WCHAR_T_IS_UTF32 | |
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