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1 | --- STLport-5.1.0/stlport/ext/type_traits.h.orig 1970-01-01 00:00:00.000000000 +0000 |
2 | +++ STLport-5.1.0/stlport/ext/type_traits.h 2006-12-18 12:56:32.000000000 +0000 | |
3 | @@ -0,0 +1,200 @@ | |
4 | +// -*- C++ -*- | |
5 | + | |
6 | +// Copyright (C) 2005, 2006 Free Software Foundation, Inc. | |
7 | +// | |
8 | +// This file is part of the GNU ISO C++ Library. This library is free | |
9 | +// software; you can redistribute it and/or modify it under the terms | |
10 | +// of the GNU General Public License as published by the Free Software | |
11 | +// Foundation; either version 2, or (at your option) any later | |
12 | +// version. | |
13 | + | |
14 | +// This library is distributed in the hope that it will be useful, but | |
15 | +// WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | +// General Public License for more details. | |
18 | + | |
19 | +// You should have received a copy of the GNU General Public License along | |
20 | +// with this library; see the file COPYING. If not, write to the Free | |
21 | +// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, | |
22 | +// USA. | |
23 | + | |
24 | +// As a special exception, you may use this file as part of a free | |
25 | +// software library without restriction. Specifically, if other files | |
26 | +// instantiate templates or use macros or inline functions from this | |
27 | +// file, or you compile this file and link it with other files to | |
28 | +// produce an executable, this file does not by itself cause the | |
29 | +// resulting executable to be covered by the GNU General Public | |
30 | +// License. This exception does not however invalidate any other | |
31 | +// reasons why the executable file might be covered by the GNU General | |
32 | +// Public License. | |
33 | + | |
34 | +/** @file ext/type_traits.h | |
35 | + * This file is a GNU extension to the Standard C++ Library. | |
36 | + */ | |
37 | + | |
38 | +#ifndef _EXT_TYPE_TRAITS | |
39 | +#define _EXT_TYPE_TRAITS 1 | |
40 | + | |
41 | +#pragma GCC system_header | |
42 | + | |
43 | +#include <cstddef> | |
44 | +#include <utility> | |
45 | +#include <limits> | |
46 | +#include <iosfwd> // std::streamsize | |
47 | +#include <bits/cpp_type_traits.h> | |
48 | + | |
49 | +_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) | |
50 | + | |
51 | + // Define a nested type if some predicate holds. | |
52 | + template<bool, typename> | |
53 | + struct __enable_if | |
54 | + { }; | |
55 | + | |
56 | + template<typename _Tp> | |
57 | + struct __enable_if<true, _Tp> | |
58 | + { typedef _Tp __type; }; | |
59 | + | |
60 | + | |
61 | + // Conditional expression for types. If true, first, if false, second. | |
62 | + template<bool _Cond, typename _Iftrue, typename _Iffalse> | |
63 | + struct __conditional_type | |
64 | + { typedef _Iftrue __type; }; | |
65 | + | |
66 | + template<typename _Iftrue, typename _Iffalse> | |
67 | + struct __conditional_type<false, _Iftrue, _Iffalse> | |
68 | + { typedef _Iffalse __type; }; | |
69 | + | |
70 | + | |
71 | + // Given an integral builtin type, return the corresponding unsigned type. | |
72 | + template<typename _Tp> | |
73 | + struct __add_unsigned | |
74 | + { | |
75 | + private: | |
76 | + typedef __enable_if<std::__is_integer<_Tp>::__value, _Tp> __if_type; | |
77 | + | |
78 | + public: | |
79 | + typedef typename __if_type::__type __type; | |
80 | + }; | |
81 | + | |
82 | + template<> | |
83 | + struct __add_unsigned<char> | |
84 | + { typedef unsigned char __type; }; | |
85 | + | |
86 | + template<> | |
87 | + struct __add_unsigned<signed char> | |
88 | + { typedef unsigned char __type; }; | |
89 | + | |
90 | + template<> | |
91 | + struct __add_unsigned<short> | |
92 | + { typedef unsigned short __type; }; | |
93 | + | |
94 | + template<> | |
95 | + struct __add_unsigned<int> | |
96 | + { typedef unsigned int __type; }; | |
97 | + | |
98 | + template<> | |
99 | + struct __add_unsigned<long> | |
100 | + { typedef unsigned long __type; }; | |
101 | + | |
102 | + template<> | |
103 | + struct __add_unsigned<long long> | |
104 | + { typedef unsigned long long __type; }; | |
105 | + | |
106 | + // Declare but don't define. | |
107 | + template<> | |
108 | + struct __add_unsigned<bool>; | |
109 | + | |
110 | + template<> | |
111 | + struct __add_unsigned<wchar_t>; | |
112 | + | |
113 | + | |
114 | + // Given an integral builtin type, return the corresponding signed type. | |
115 | + template<typename _Tp> | |
116 | + struct __remove_unsigned | |
117 | + { | |
118 | + private: | |
119 | + typedef __enable_if<std::__is_integer<_Tp>::__value, _Tp> __if_type; | |
120 | + | |
121 | + public: | |
122 | + typedef typename __if_type::__type __type; | |
123 | + }; | |
124 | + | |
125 | + template<> | |
126 | + struct __remove_unsigned<char> | |
127 | + { typedef signed char __type; }; | |
128 | + | |
129 | + template<> | |
130 | + struct __remove_unsigned<unsigned char> | |
131 | + { typedef signed char __type; }; | |
132 | + | |
133 | + template<> | |
134 | + struct __remove_unsigned<unsigned short> | |
135 | + { typedef short __type; }; | |
136 | + | |
137 | + template<> | |
138 | + struct __remove_unsigned<unsigned int> | |
139 | + { typedef int __type; }; | |
140 | + | |
141 | + template<> | |
142 | + struct __remove_unsigned<unsigned long> | |
143 | + { typedef long __type; }; | |
144 | + | |
145 | + template<> | |
146 | + struct __remove_unsigned<unsigned long long> | |
147 | + { typedef long long __type; }; | |
148 | + | |
149 | + // Declare but don't define. | |
150 | + template<> | |
151 | + struct __remove_unsigned<bool>; | |
152 | + | |
153 | + template<> | |
154 | + struct __remove_unsigned<wchar_t>; | |
155 | + | |
156 | + | |
157 | + // Compile time constants for builtin types. | |
158 | + // Sadly std::numeric_limits member functions cannot be used for this. | |
159 | +#define __glibcxx_signed(_Tp) ((_Tp)(-1) < 0) | |
160 | +#define __glibcxx_digits(_Tp) \ | |
161 | + (sizeof(_Tp) * __CHAR_BIT__ - __glibcxx_signed(_Tp)) | |
162 | + | |
163 | +#define __glibcxx_min(_Tp) \ | |
164 | + (__glibcxx_signed(_Tp) ? (_Tp)1 << __glibcxx_digits(_Tp) : (_Tp)0) | |
165 | + | |
166 | +#define __glibcxx_max(_Tp) \ | |
167 | + (__glibcxx_signed(_Tp) ? ((_Tp)1 << __glibcxx_digits(_Tp)) - 1 : ~(_Tp)0) | |
168 | + | |
169 | + template<typename _Value> | |
170 | + struct __numeric_traits_integer | |
171 | + { | |
172 | + // Only integers for initialization of member constant. | |
173 | + static const _Value __min = __glibcxx_min(_Value); | |
174 | + static const _Value __max = __glibcxx_max(_Value); | |
175 | + }; | |
176 | + | |
177 | + template<typename _Value> | |
178 | + const _Value __numeric_traits_integer<_Value>::__min; | |
179 | + | |
180 | + template<typename _Value> | |
181 | + const _Value __numeric_traits_integer<_Value>::__max; | |
182 | + | |
183 | + template<typename _Value> | |
184 | + struct __numeric_traits_floating | |
185 | + { | |
186 | + // Only floating point types. See N1822. | |
187 | + static const _STLP_STD::streamsize __max_digits10 = | |
188 | + 2 + _STLP_STD::numeric_limits<_Value>::digits * 3010/10000; | |
189 | + }; | |
190 | + | |
191 | + template<typename _Value> | |
192 | + const _STLP_STD::streamsize __numeric_traits_floating<_Value>::__max_digits10; | |
193 | + | |
194 | + template<typename _Value> | |
195 | + struct __numeric_traits | |
196 | + : public __conditional_type<std::__is_integer<_Value>::__value, | |
197 | + __numeric_traits_integer<_Value>, | |
198 | + __numeric_traits_floating<_Value> >::__type | |
199 | + { }; | |
200 | + | |
201 | +_GLIBCXX_END_NAMESPACE | |
202 | + | |
203 | +#endif |