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| // Character Traits for use by standard string and iostream -*- C++ -*- |
| |
| // Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 2, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING. If not, write to the Free |
| // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| // USA. |
| |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| |
| // |
| // ISO C++ 14882: 21 Strings library |
| // |
| |
| #ifndef _CPP_BITS_CHAR_TRAITS_H |
| #define _CPP_BITS_CHAR_TRAITS_H 1 |
| |
| #pragma GCC system_header |
| |
| #include <bits/std_cstring.h> // For memmove, memset, memchr |
| #include <bits/fpos.h> // For streampos |
| |
| namespace std |
| { |
| // 21.1.2 Basis for explicit _Traits specialization |
| // NB: That for any given actual character type this definition is |
| // probably wrong. |
| template<class _CharT> |
| struct char_traits |
| { |
| typedef _CharT char_type; |
| // Unsigned as wint_t in unsigned. |
| typedef unsigned long int_type; |
| typedef streampos pos_type; |
| typedef streamoff off_type; |
| typedef mbstate_t state_type; |
| |
| static void |
| assign(char_type& __c1, const char_type& __c2) |
| { __c1 = __c2; } |
| |
| static bool |
| eq(const char_type& __c1, const char_type& __c2) |
| { return __c1 == __c2; } |
| |
| static bool |
| lt(const char_type& __c1, const char_type& __c2) |
| { return __c1 < __c2; } |
| |
| static int |
| compare(const char_type* __s1, const char_type* __s2, size_t __n) |
| { |
| for (size_t __i = 0; __i < __n; ++__i) |
| if (!eq(__s1[__i], __s2[__i])) |
| return lt(__s1[__i], __s2[__i]) ? -1 : 1; |
| return 0; |
| } |
| |
| static size_t |
| length(const char_type* __s) |
| { |
| const char_type* __p = __s; |
| while (*__p) ++__p; |
| return (__p - __s); |
| } |
| |
| static const char_type* |
| find(const char_type* __s, size_t __n, const char_type& __a) |
| { |
| for (const char_type* __p = __s; size_t(__p - __s) < __n; ++__p) |
| if (*__p == __a) return __p; |
| return 0; |
| } |
| |
| static char_type* |
| move(char_type* __s1, const char_type* __s2, size_t __n) |
| { return (char_type*) memmove(__s1, __s2, __n * sizeof(char_type)); } |
| |
| static char_type* |
| copy(char_type* __s1, const char_type* __s2, size_t __n) |
| { return (char_type*) memcpy(__s1, __s2, __n * sizeof(char_type)); } |
| |
| static char_type* |
| assign(char_type* __s, size_t __n, char_type __a) |
| { |
| for (char_type* __p = __s; __p < __s + __n; ++__p) |
| assign(*__p, __a); |
| return __s; |
| } |
| |
| static char_type |
| to_char_type(const int_type& __c) |
| { return char_type(__c); } |
| |
| static int_type |
| to_int_type(const char_type& __c) { return int_type(__c); } |
| |
| static bool |
| eq_int_type(const int_type& __c1, const int_type& __c2) |
| { return __c1 == __c2; } |
| |
| static int_type |
| eof() { return static_cast<int_type>(-1); } |
| |
| static int_type |
| not_eof(const int_type& __c) |
| { return eq_int_type(__c, eof()) ? int_type(0) : __c; } |
| }; |
| |
| |
| // 21.1.4 char_traits specializations |
| template<> |
| struct char_traits<char> |
| { |
| typedef char char_type; |
| typedef int int_type; |
| typedef streampos pos_type; |
| typedef streamoff off_type; |
| typedef mbstate_t state_type; |
| |
| static void |
| assign(char_type& __c1, const char_type& __c2) |
| { __c1 = __c2; } |
| |
| static bool |
| eq(const char_type& __c1, const char_type& __c2) |
| { return __c1 == __c2; } |
| |
| static bool |
| lt(const char_type& __c1, const char_type& __c2) |
| { return __c1 < __c2; } |
| |
| static int |
| compare(const char_type* __s1, const char_type* __s2, size_t __n) |
| { return memcmp(__s1, __s2, __n); } |
| |
| static size_t |
| length(const char_type* __s) |
| { return strlen(__s); } |
| |
| static const char_type* |
| find(const char_type* __s, size_t __n, const char_type& __a) |
| { return static_cast<const char_type*>(memchr(__s, __a, __n)); } |
| |
| static char_type* |
| move(char_type* __s1, const char_type* __s2, size_t __n) |
| { return static_cast<char_type*>(memmove(__s1, __s2, __n)); } |
| |
| static char_type* |
| copy(char_type* __s1, const char_type* __s2, size_t __n) |
| { return static_cast<char_type*>(memcpy(__s1, __s2, __n)); } |
| |
| static char_type* |
| assign(char_type* __s, size_t __n, char_type __a) |
| { return static_cast<char_type*>(memset(__s, __a, __n)); } |
| |
| static char_type |
| to_char_type(const int_type& __c) |
| { return static_cast<char_type>(__c); } |
| |
| // To keep both the byte 0xff and the eof symbol 0xffffffff |
| // from ending up as 0xffffffff. |
| static int_type |
| to_int_type(const char_type& __c) |
| { return static_cast<int_type>(static_cast<unsigned char>(__c)); } |
| |
| static bool |
| eq_int_type(const int_type& __c1, const int_type& __c2) |
| { return __c1 == __c2; } |
| |
| static int_type |
| eof() { return static_cast<int_type>(EOF); } |
| |
| static int_type |
| not_eof(const int_type& __c) |
| { return (__c == eof()) ? 0 : __c; } |
| }; |
| |
| |
| #ifdef _GLIBCPP_USE_WCHAR_T |
| template<> |
| struct char_traits<wchar_t> |
| { |
| typedef wchar_t char_type; |
| typedef wint_t int_type; |
| typedef streamoff off_type; |
| typedef wstreampos pos_type; |
| typedef mbstate_t state_type; |
| |
| static void |
| assign(char_type& __c1, const char_type& __c2) |
| { __c1 = __c2; } |
| |
| static bool |
| eq(const char_type& __c1, const char_type& __c2) |
| { return __c1 == __c2; } |
| |
| static bool |
| lt(const char_type& __c1, const char_type& __c2) |
| { return __c1 < __c2; } |
| |
| static int |
| compare(const char_type* __s1, const char_type* __s2, size_t __n) |
| { return wmemcmp(__s1, __s2, __n); } |
| |
| static size_t |
| length(const char_type* __s) |
| { return wcslen(__s); } |
| |
| static const char_type* |
| find(const char_type* __s, size_t __n, const char_type& __a) |
| { return wmemchr(__s, __a, __n); } |
| |
| static char_type* |
| move(char_type* __s1, const char_type* __s2, int_type __n) |
| { return wmemmove(__s1, __s2, __n); } |
| |
| static char_type* |
| copy(char_type* __s1, const char_type* __s2, size_t __n) |
| { return wmemcpy(__s1, __s2, __n); } |
| |
| static char_type* |
| assign(char_type* __s, size_t __n, char_type __a) |
| { return wmemset(__s, __a, __n); } |
| |
| static char_type |
| to_char_type(const int_type& __c) { return char_type(__c); } |
| |
| static int_type |
| to_int_type(const char_type& __c) { return int_type(__c); } |
| |
| static bool |
| eq_int_type(const int_type& __c1, const int_type& __c2) |
| { return __c1 == __c2; } |
| |
| static int_type |
| eof() { return static_cast<int_type>(WEOF); } |
| |
| static int_type |
| not_eof(const int_type& __c) |
| { return eq_int_type(__c, eof()) ? 0 : __c; } |
| }; |
| #endif //_GLIBCPP_USE_WCHAR_T |
| |
| template<typename _CharT, typename _Traits> |
| struct _Char_traits_match |
| { |
| _CharT _M_c; |
| _Char_traits_match(_CharT const& __c) : _M_c(__c) { } |
| |
| bool |
| operator()(_CharT const& __a) { return _Traits::eq(_M_c, __a); } |
| }; |
| } // namespace std |
| |
| #endif |