1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
// Copyright John Maddock 2007.
// Use, modification and distribution are subject to the
// Boost Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_MATH_TRUNC_HPP
#define BOOST_MATH_TRUNC_HPP
#ifdef _MSC_VER
#pragma once
#endif
#include <boost/math/special_functions/math_fwd.hpp>
#include <boost/math/tools/config.hpp>
#include <boost/math/policies/error_handling.hpp>
#include <boost/math/special_functions/fpclassify.hpp>
#include <boost/type_traits/is_constructible.hpp>
#include <boost/core/enable_if.hpp>
namespace boost{ namespace math{ namespace detail{
template <class T, class Policy>
inline typename tools::promote_args<T>::type trunc(const T& v, const Policy& pol, const mpl::false_&)
{
BOOST_MATH_STD_USING
typedef typename tools::promote_args<T>::type result_type;
if(!(boost::math::isfinite)(v))
return policies::raise_rounding_error("boost::math::trunc<%1%>(%1%)", 0, static_cast<result_type>(v), static_cast<result_type>(v), pol);
return (v >= 0) ? static_cast<result_type>(floor(v)) : static_cast<result_type>(ceil(v));
}
template <class T, class Policy>
inline typename tools::promote_args<T>::type trunc(const T& v, const Policy&, const mpl::true_&)
{
return v;
}
}
template <class T, class Policy>
inline typename tools::promote_args<T>::type trunc(const T& v, const Policy& pol)
{
return detail::trunc(v, pol, mpl::bool_<detail::is_integer_for_rounding<T>::value>());
}
template <class T>
inline typename tools::promote_args<T>::type trunc(const T& v)
{
return trunc(v, policies::policy<>());
}
//
// The following functions will not compile unless T has an
// implicit convertion to the integer types. For user-defined
// number types this will likely not be the case. In that case
// these functions should either be specialized for the UDT in
// question, or else overloads should be placed in the same
// namespace as the UDT: these will then be found via argument
// dependent lookup. See our concept archetypes for examples.
//
template <class T, class Policy>
inline int itrunc(const T& v, const Policy& pol)
{
BOOST_MATH_STD_USING
typedef typename tools::promote_args<T>::type result_type;
result_type r = boost::math::trunc(v, pol);
if((r > (std::numeric_limits<int>::max)()) || (r < (std::numeric_limits<int>::min)()))
return static_cast<int>(policies::raise_rounding_error("boost::math::itrunc<%1%>(%1%)", 0, static_cast<result_type>(v), 0, pol));
return static_cast<int>(r);
}
template <class T>
inline int itrunc(const T& v)
{
return itrunc(v, policies::policy<>());
}
template <class T, class Policy>
inline long ltrunc(const T& v, const Policy& pol)
{
BOOST_MATH_STD_USING
typedef typename tools::promote_args<T>::type result_type;
result_type r = boost::math::trunc(v, pol);
if((r > (std::numeric_limits<long>::max)()) || (r < (std::numeric_limits<long>::min)()))
return static_cast<long>(policies::raise_rounding_error("boost::math::ltrunc<%1%>(%1%)", 0, static_cast<result_type>(v), 0L, pol));
return static_cast<long>(r);
}
template <class T>
inline long ltrunc(const T& v)
{
return ltrunc(v, policies::policy<>());
}
#ifdef BOOST_HAS_LONG_LONG
template <class T, class Policy>
inline boost::long_long_type lltrunc(const T& v, const Policy& pol)
{
BOOST_MATH_STD_USING
typedef typename tools::promote_args<T>::type result_type;
result_type r = boost::math::trunc(v, pol);
if((r > (std::numeric_limits<boost::long_long_type>::max)()) || (r < (std::numeric_limits<boost::long_long_type>::min)()))
return static_cast<boost::long_long_type>(policies::raise_rounding_error("boost::math::lltrunc<%1%>(%1%)", 0, v, static_cast<boost::long_long_type>(0), pol));
return static_cast<boost::long_long_type>(r);
}
template <class T>
inline boost::long_long_type lltrunc(const T& v)
{
return lltrunc(v, policies::policy<>());
}
#endif
template <class T, class Policy>
inline typename boost::enable_if_c<boost::is_constructible<int, T>::value, int>::type
iconvert(const T& v, const Policy&)
{
return static_cast<int>(v);
}
template <class T, class Policy>
inline typename boost::disable_if_c<boost::is_constructible<int, T>::value, int>::type
iconvert(const T& v, const Policy& pol)
{
using boost::math::itrunc;
return itrunc(v, pol);
}
template <class T, class Policy>
inline typename boost::enable_if_c<boost::is_constructible<long, T>::value, long>::type
lconvert(const T& v, const Policy&)
{
return static_cast<long>(v);
}
template <class T, class Policy>
inline typename boost::disable_if_c<boost::is_constructible<long, T>::value, long>::type
lconvert(const T& v, const Policy& pol)
{
using boost::math::ltrunc;
return ltrunc(v, pol);
}
#ifdef BOOST_HAS_LONG_LONG
template <class T, class Policy>
inline typename boost::enable_if_c<boost::is_constructible<boost::long_long_type, T>::value, boost::long_long_type>::type
llconvertert(const T& v, const Policy&)
{
return static_cast<boost::long_long_type>(v);
}
template <class T, class Policy>
inline typename boost::disable_if_c<boost::is_constructible<boost::long_long_type, T>::value, boost::long_long_type>::type
llconvertert(const T& v, const Policy& pol)
{
using boost::math::lltrunc;
return lltrunc(v, pol);
}
#endif
}} // namespaces
#endif // BOOST_MATH_TRUNC_HPP
|
