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- // Character Traits for use by standard string and iostream -*- C++ -*-
-
- // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
- // 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
- //
-
- /** @file char_traits.h
- * This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
- */
-
- #ifndef _CPP_BITS_CHAR_TRAITS_H
- #define _CPP_BITS_CHAR_TRAITS_H 1
-
- #pragma GCC system_header
-
- #include <cstring> // 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 is 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);
-
- static bool
- eq(const char_type& __c1, const char_type& __c2);
-
- static bool
- lt(const char_type& __c1, const char_type& __c2);
-
- static int
- compare(const char_type* __s1, const char_type* __s2, size_t __n);
-
- static size_t
- length(const char_type* __s);
-
- static const char_type*
- find(const char_type* __s, size_t __n, const char_type& __a);
-
- static char_type*
- move(char_type* __s1, const char_type* __s2, size_t __n);
-
- static char_type*
- copy(char_type* __s1, const char_type* __s2, size_t __n);
-
- static char_type*
- assign(char_type* __s, size_t __n, char_type __a);
-
- static char_type
- to_char_type(const int_type& __c);
-
- static int_type
- to_int_type(const char_type& __c);
-
- static bool
- eq_int_type(const int_type& __c1, const int_type& __c2);
-
- static int_type
- eof();
-
- static int_type
- not_eof(const int_type& __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
-