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Whole document tree                   char_traits.h Go to the documentation of this file. // 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 { 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; } }; 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