nerdcruft/libcruft-util
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maths: move functions inline, remove ipp

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This commit is contained in:
Danny Robson 2015-11-16 13:57:51 +11:00
parent eb2722bfa4
commit 486cefc4c6
3 changed files with 22 additions and 72 deletions
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1
Makefile.am
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@ -168,7 +168,6 @@ UTIL_FILES = \
log.ipp \
maths.cpp \
maths.hpp \
maths.ipp \
matrix.cpp \
matrix2.cpp \
matrix3.cpp \

29
maths.hpp
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@ -59,7 +59,10 @@ namespace util {
///////////////////////////////////////////////////////////////////////////
template <typename T>
constexpr T
pow [[gnu::const]] (T x, unsigned y);
pow [[gnu::const]] (T x, unsigned y)
{
return y == 0 ? T{1} : x * pow (x, y - 1);
}
//-------------------------------------------------------------------------
@ -133,9 +136,24 @@ namespace util {
//-----------------------------------------------------------------------------
constexpr int sign (int);
constexpr float sign (float);
constexpr double sign (double);
template <typename T>
constexpr std::enable_if_t<
std::is_signed<T>::value && std::is_integral<T>::value, T
>
sign (T t)
{
return t < 0 ? -1 : 1;
}
//-------------------------------------------------------------------------
template <typename T>
constexpr std::enable_if_t<
std::is_floating_point<T>::value, T
>
sign (T t)
{
return std::signbit (t) ? -1 : 1;
}
///////////////////////////////////////////////////////////////////////////////
@ -546,7 +564,4 @@ namespace util {
}
//#include "types/string.hpp"
#include "maths.ipp"
#endif // __MATHS_HPP

64
maths.ipp
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@ -1,64 +0,0 @@
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2014 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __UTIL_MATHS_IPP
#define __UTIL_MATHS_IPP
#else
#error "Include only once"
#endif
#include <type_traits>
///////////////////////////////////////////////////////////////////////////////
template <typename T>
constexpr T
util::pow (T x, unsigned y)
{
if (y == 0)
return T(1);
return x * util::pow (x, y - 1);
}
///////////////////////////////////////////////////////////////////////////////
/// Return a unit type with a sign that matches the provided value
///
/// We were using __builtin_signbit for the potential speedboost, but it causes
/// problems with constexpr under clang. If you need speed then you'll probably
/// have to handcode something.
constexpr int
util::sign (int v)
{
return std::signbit (v) ? -1 : 1;
}
//-----------------------------------------------------------------------------
constexpr float
util::sign (float v)
{
return std::signbit (v) ? -1.f : 1.f;
}
//-----------------------------------------------------------------------------
constexpr double
util::sign (double v)
{
return std::signbit (v) ? -1. : 1.f;
}