diff options
Diffstat (limited to 'libstdc++-v3/include/ext/pod_char_traits.h')
| -rw-r--r-- | libstdc++-v3/include/ext/pod_char_traits.h | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/libstdc++-v3/include/ext/pod_char_traits.h b/libstdc++-v3/include/ext/pod_char_traits.h new file mode 100644 index 000000000..3c9f0988a --- /dev/null +++ b/libstdc++-v3/include/ext/pod_char_traits.h @@ -0,0 +1,188 @@ +// POD character, std::char_traits specialization -*- C++ -*- + +// Copyright (C) 2002, 2003, 2004, 2005, 2007, 2009 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 3, 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. + +// Under Section 7 of GPL version 3, you are granted additional +// permissions described in the GCC Runtime Library Exception, version +// 3.1, as published by the Free Software Foundation. + +// You should have received a copy of the GNU General Public License and +// a copy of the GCC Runtime Library Exception along with this program; +// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +// <http://www.gnu.org/licenses/>. + +/** @file ext/pod_char_traits.h + * This file is a GNU extension to the Standard C++ Library. + */ + +// Gabriel Dos Reis <gdr@integrable-solutions.net> +// Benjamin Kosnik <bkoz@redhat.com> + +#ifndef _POD_CHAR_TRAITS_H +#define _POD_CHAR_TRAITS_H 1 + +#include <string> + +namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) +{ +_GLIBCXX_BEGIN_NAMESPACE_VERSION + + // POD character abstraction. + // NB: The char_type parameter is a subset of int_type, as to allow + // int_type to properly hold the full range of char_type values as + // well as EOF. + /// @brief A POD class that serves as a character abstraction class. + template<typename V, typename I, typename S = std::mbstate_t> + struct character + { + typedef V value_type; + typedef I int_type; + typedef S state_type; + typedef character<V, I, S> char_type; + + value_type value; + + template<typename V2> + static char_type + from(const V2& v) + { + char_type ret = { static_cast<value_type>(v) }; + return ret; + } + + template<typename V2> + static V2 + to(const char_type& c) + { + V2 ret = { static_cast<V2>(c.value) }; + return ret; + } + + }; + + template<typename V, typename I, typename S> + inline bool + operator==(const character<V, I, S>& lhs, const character<V, I, S>& rhs) + { return lhs.value == rhs.value; } + + template<typename V, typename I, typename S> + inline bool + operator<(const character<V, I, S>& lhs, const character<V, I, S>& rhs) + { return lhs.value < rhs.value; } + +_GLIBCXX_END_NAMESPACE_VERSION +} // namespace + +namespace std _GLIBCXX_VISIBILITY(default) +{ +_GLIBCXX_BEGIN_NAMESPACE_VERSION + + /// char_traits<__gnu_cxx::character> specialization. + template<typename V, typename I, typename S> + struct char_traits<__gnu_cxx::character<V, I, S> > + { + typedef __gnu_cxx::character<V, I, S> char_type; + typedef typename char_type::int_type int_type; + typedef typename char_type::state_type state_type; + typedef fpos<state_type> pos_type; + typedef streamoff off_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->value) + ++__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 static_cast<char_type*> + (__builtin_memmove(__s1, __s2, __n * sizeof(char_type))); + } + + static char_type* + copy(char_type* __s1, const char_type* __s2, size_t __n) + { + std::copy(__s2, __s2 + __n, __s1); + return __s1; + } + + static char_type* + assign(char_type* __s, size_t __n, char_type __a) + { + std::fill_n(__s, __n, __a); + return __s; + } + + static char_type + to_char_type(const int_type& __i) + { return char_type::template from(__i); } + + static int_type + to_int_type(const char_type& __c) + { return char_type::template to<int_type>(__c); } + + static bool + eq_int_type(const int_type& __c1, const int_type& __c2) + { return __c1 == __c2; } + + static int_type + eof() + { + int_type __r = { -1 }; + return __r; + } + + static int_type + not_eof(const int_type& __c) + { return eq_int_type(__c, eof()) ? int_type() : __c; } + }; + +_GLIBCXX_END_NAMESPACE_VERSION +} // namespace + +#endif |