release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/include/c++/4.5.3/ext/pod_char_traits.h

   1 // POD character, std::char_traits specialization -*- C++ -*-
   2
   3 // Copyright (C) 2002, 2003, 2004, 2005, 2007, 2009 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 /** @file ext/pod_char_traits.h
  26  *  This file is a GNU extension to the Standard C++ Library.
  27  */
  28
  29 // Gabriel Dos Reis <gdr@integrable-solutions.net>
  30 // Benjamin Kosnik <bkoz@redhat.com>
  31
  32 #ifndef _POD_CHAR_TRAITS_H
  33 #define _POD_CHAR_TRAITS_H 1
  34
  35 #include <string>
  36
  37 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
  38
  39   // POD character abstraction.
  40   // NB: The char_type parameter is a subset of int_type, as to allow
  41   // int_type to properly hold the full range of char_type values as
  42   // well as EOF.
  43   /// @brief A POD class that serves as a character abstraction class.
  44   template<typename V, typename I, typename S = std::mbstate_t>
  45     struct character
  46     {
  47       typedef V                         value_type;
  48       typedef I                         int_type;
  49       typedef S                         state_type;
  50       typedef character<V, I, S>        char_type;
  51
  52       value_type        value;
  53
  54       template<typename V2>
  55         static char_type
  56         from(const V2& v)
  57         {
  58           char_type ret = { static_cast<value_type>(v) };
  59           return ret;
  60         }
  61
  62       template<typename V2>
  63         static V2
  64         to(const char_type& c)
  65         {
  66           V2 ret = { static_cast<V2>(c.value) };
  67           return ret;
  68         }
  69
  70     };
  71
  72   template<typename V, typename I, typename S>
  73     inline bool
  74     operator==(const character<V, I, S>& lhs, const character<V, I, S>& rhs)
  75     { return lhs.value == rhs.value; }
  76
  77   template<typename V, typename I, typename S>
  78     inline bool
  79     operator<(const character<V, I, S>& lhs, const character<V, I, S>& rhs)
  80     { return lhs.value < rhs.value; }
  81
  82 _GLIBCXX_END_NAMESPACE
  83
  84 _GLIBCXX_BEGIN_NAMESPACE(std)
  85
  86   /// char_traits<__gnu_cxx::character> specialization.
  87   template<typename V, typename I, typename S>
  88     struct char_traits<__gnu_cxx::character<V, I, S> >
  89     {
  90       typedef __gnu_cxx::character<V, I, S>     char_type;
  91       typedef typename char_type::int_type      int_type;
  92       typedef typename char_type::state_type    state_type;
  93       typedef fpos<state_type>                  pos_type;
  94       typedef streamoff                         off_type;
  95
  96       static void
  97       assign(char_type& __c1, const char_type& __c2)
  98       { __c1 = __c2; }
  99
 100       static bool
 101       eq(const char_type& __c1, const char_type& __c2)
 102       { return __c1 == __c2; }
 103
 104       static bool
 105       lt(const char_type& __c1, const char_type& __c2)
 106       { return __c1 < __c2; }
 107
 108       static int
 109       compare(const char_type* __s1, const char_type* __s2, size_t __n)
 110       {
 111         for (size_t __i = 0; __i < __n; ++__i)
 112           if (!eq(__s1[__i], __s2[__i]))
 113             return lt(__s1[__i], __s2[__i]) ? -1 : 1;
 114         return 0;
 115       }
 116
 117       static size_t
 118       length(const char_type* __s)
 119       {
 120         const char_type* __p = __s;
 121         while (__p->value)
 122           ++__p;
 123         return (__p - __s);
 124       }
 125
 126       static const char_type*
 127       find(const char_type* __s, size_t __n, const char_type& __a)
 128       {
 129         for (const char_type* __p = __s; size_t(__p - __s) < __n; ++__p)
 130           if (*__p == __a)
 131             return __p;
 132         return 0;
 133       }
 134
 135       static char_type*
 136       move(char_type* __s1, const char_type* __s2, size_t __n)
 137       {
 138         return static_cast<char_type*>
 139           (__builtin_memmove(__s1, __s2, __n * sizeof(char_type)));
 140       }
 141
 142       static char_type*
 143       copy(char_type* __s1, const char_type* __s2, size_t __n)
 144       {
 145         std::copy(__s2, __s2 + __n, __s1);
 146         return __s1;
 147       }
 148
 149       static char_type*
 150       assign(char_type* __s, size_t __n, char_type __a)
 151       {
 152         std::fill_n(__s, __n, __a);
 153         return __s;
 154       }
 155
 156       static char_type
 157       to_char_type(const int_type& __i)
 158       { return char_type::template from(__i); }
 159
 160       static int_type
 161       to_int_type(const char_type& __c)
 162       { return char_type::template to<int_type>(__c); }
 163
 164       static bool
 165       eq_int_type(const int_type& __c1, const int_type& __c2)
 166       { return __c1 == __c2; }
 167
 168       static int_type
 169       eof()
 170       {
 171         int_type __r = { -1 };
 172         return __r;
 173       }
 174
 175       static int_type
 176       not_eof(const int_type& __c)
 177       { return eq_int_type(__c, eof()) ? int_type() : __c; }
 178     };
 179
 180 _GLIBCXX_END_NAMESPACE
 181
 182 #endif