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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
+//
+
+/** @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 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
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