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// POD character, std::char_traits specialization -*- C++ -*- |
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// Copyright (C) 2002-2015 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. |
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// 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. |
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// 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. |
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// 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/>. |
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/** @file ext/pod_char_traits.h |
* This file is a GNU extension to the Standard C++ Library. |
*/ |
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// Gabriel Dos Reis <gdr@integrable-solutions.net> |
// Benjamin Kosnik <bkoz@redhat.com> |
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#ifndef _POD_CHAR_TRAITS_H |
#define _POD_CHAR_TRAITS_H 1 |
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#pragma GCC system_header |
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#include <string> |
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namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) |
{ |
_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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// 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 _Value, typename _Int, typename _St = std::mbstate_t> |
struct character |
{ |
typedef _Value value_type; |
typedef _Int int_type; |
typedef _St state_type; |
typedef character<_Value, _Int, _St> char_type; |
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value_type value; |
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template<typename V2> |
static char_type |
from(const V2& v) |
{ |
char_type ret = { static_cast<value_type>(v) }; |
return ret; |
} |
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template<typename V2> |
static V2 |
to(const char_type& c) |
{ |
V2 ret = { static_cast<V2>(c.value) }; |
return ret; |
} |
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}; |
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template<typename _Value, typename _Int, typename _St> |
inline bool |
operator==(const character<_Value, _Int, _St>& lhs, |
const character<_Value, _Int, _St>& rhs) |
{ return lhs.value == rhs.value; } |
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template<typename _Value, typename _Int, typename _St> |
inline bool |
operator<(const character<_Value, _Int, _St>& lhs, |
const character<_Value, _Int, _St>& rhs) |
{ return lhs.value < rhs.value; } |
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_GLIBCXX_END_NAMESPACE_VERSION |
} // namespace |
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namespace std _GLIBCXX_VISIBILITY(default) |
{ |
_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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/// char_traits<__gnu_cxx::character> specialization. |
template<typename _Value, typename _Int, typename _St> |
struct char_traits<__gnu_cxx::character<_Value, _Int, _St> > |
{ |
typedef __gnu_cxx::character<_Value, _Int, _St> 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; |
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static void |
assign(char_type& __c1, const char_type& __c2) |
{ __c1 = __c2; } |
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static bool |
eq(const char_type& __c1, const char_type& __c2) |
{ return __c1 == __c2; } |
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static bool |
lt(const char_type& __c1, const char_type& __c2) |
{ return __c1 < __c2; } |
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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; |
} |
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static size_t |
length(const char_type* __s) |
{ |
const char_type* __p = __s; |
while (__p->value) |
++__p; |
return (__p - __s); |
} |
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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; |
} |
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static char_type* |
move(char_type* __s1, const char_type* __s2, size_t __n) |
{ |
if (__n == 0) |
return __s1; |
return static_cast<char_type*> |
(__builtin_memmove(__s1, __s2, __n * sizeof(char_type))); |
} |
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static char_type* |
copy(char_type* __s1, const char_type* __s2, size_t __n) |
{ |
if (__n == 0) |
return __s1; |
std::copy(__s2, __s2 + __n, __s1); |
return __s1; |
} |
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static char_type* |
assign(char_type* __s, size_t __n, char_type __a) |
{ |
std::fill_n(__s, __n, __a); |
return __s; |
} |
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static char_type |
to_char_type(const int_type& __i) |
{ return char_type::template from(__i); } |
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static int_type |
to_int_type(const char_type& __c) |
{ return char_type::template to<int_type>(__c); } |
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static bool |
eq_int_type(const int_type& __c1, const int_type& __c2) |
{ return __c1 == __c2; } |
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static int_type |
eof() |
{ |
int_type __r = { static_cast<typename __gnu_cxx::__conditional_type |
<std::__is_integer<int_type>::__value, |
int_type, int>::__type>(-1) }; |
return __r; |
} |
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static int_type |
not_eof(const int_type& __c) |
{ return eq_int_type(__c, eof()) ? int_type() : __c; } |
}; |
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_GLIBCXX_END_NAMESPACE_VERSION |
} // namespace |
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#endif |