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Diffstat (limited to 'basebmp/inc/basebmp/metafunctions.hxx')
| -rw-r--r-- | basebmp/inc/basebmp/metafunctions.hxx | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/basebmp/inc/basebmp/metafunctions.hxx b/basebmp/inc/basebmp/metafunctions.hxx deleted file mode 100644 index 6d67abab90..0000000000 --- a/basebmp/inc/basebmp/metafunctions.hxx +++ /dev/null @@ -1,235 +0,0 @@ -/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ -/************************************************************************* - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * Copyright 2000, 2010 Oracle and/or its affiliates. - * - * OpenOffice.org - a multi-platform office productivity suite - * - * This file is part of OpenOffice.org. - * - * OpenOffice.org is free software: you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 3 - * only, as published by the Free Software Foundation. - * - * OpenOffice.org 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 Lesser General Public License version 3 for more details - * (a copy is included in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU Lesser General Public License - * version 3 along with OpenOffice.org. If not, see - * <http://www.openoffice.org/license.html> - * for a copy of the LGPLv3 License. - * - ************************************************************************/ - -#ifndef INCLUDED_BASEBMP_METAFUNCTIONS_HXX -#define INCLUDED_BASEBMP_METAFUNCTIONS_HXX - -#include <boost/mpl/integral_c.hpp> -#include <vigra/metaprogramming.hxx> -#include <vigra/numerictraits.hxx> - -#include <functional> - -namespace basebmp -{ - -// TODO(Q3): move to generic place (o3tl?) - -/** template meta function: add const qualifier to 2nd type, if given - 1st type has it -*/ -template<typename A, typename B> struct clone_const -{ - typedef B type; -}; -template<typename A, typename B> struct clone_const<const A,B> -{ - typedef const B type; -}; - -/** template meta function: add const qualifier to plain type (if not - already there) - */ -template <typename T> struct add_const -{ - typedef const T type; -}; -template <typename T> struct add_const<const T> -{ - typedef const T type; -}; - -/// template meta function: remove const qualifier from plain type -template <typename T> struct remove_const -{ - typedef T type; -}; -template <typename T> struct remove_const<const T> -{ - typedef T type; -}; - -//-------------------------------------------------------------- - -/// Base class for an adaptable ternary functor -template< typename A1, typename A2, typename A3, typename R > struct TernaryFunctorBase -{ - typedef A1 first_argument_type; - typedef A2 second_argument_type; - typedef A3 third_argument_type; - typedef R result_type; -}; - -//-------------------------------------------------------------- - -/** template meta function: ensure that given integer type is unsigned - - If given integer type is already unsigned, return as-is - - otherwise, convert to unsigned type of same or greater range. - */ -template< typename T > struct make_unsigned; - -#define BASEBMP_MAKE_UNSIGNED(T,U) \ - template<> struct make_unsigned<T> { \ - typedef U type; \ - }; - -BASEBMP_MAKE_UNSIGNED(signed char,unsigned char) -BASEBMP_MAKE_UNSIGNED(unsigned char,unsigned char) -BASEBMP_MAKE_UNSIGNED(short,unsigned short) -BASEBMP_MAKE_UNSIGNED(unsigned short,unsigned short) -BASEBMP_MAKE_UNSIGNED(int,unsigned int) -BASEBMP_MAKE_UNSIGNED(unsigned int,unsigned int) -BASEBMP_MAKE_UNSIGNED(long,unsigned long) -BASEBMP_MAKE_UNSIGNED(unsigned long,unsigned long) - -#undef BASEBMP_MAKE_UNSIGNED - -/// cast integer to unsigned type of similar size -template< typename T > inline typename make_unsigned<T>::type unsigned_cast( T value ) -{ - return static_cast< typename make_unsigned<T>::type >(value); -} - -//-------------------------------------------------------------- - -/// returns true, if given number is strictly less than 0 -template< typename T > inline bool is_negative( T x ) -{ - return x < 0; -} - -/// Overload for ints (branch-free) -inline bool is_negative( int x ) -{ - // force logic shift (result for signed shift right is undefined) - return static_cast<unsigned int>(x) >> (sizeof(int)*8-1); -} - -//-------------------------------------------------------------- - -/// Results in VigraTrueType, if T is of integer type and scalar -template< typename T, typename trueCase, typename falseCase > -struct ifScalarIntegral -{ - typedef - typename vigra::If< - typename vigra::NumericTraits< T >::isIntegral, - typename vigra::If< - typename vigra::NumericTraits< T >::isScalar, - trueCase, - falseCase >::type, - falseCase >::type type; -}; - -/// Results in VigraTrueType, if T is of non-integer type and scalar -template< typename T, typename trueCase, typename falseCase > -struct ifScalarNonIntegral -{ - typedef - typename vigra::If< - typename vigra::NumericTraits< T >::isIntegral, - falseCase, - typename vigra::If< - typename vigra::NumericTraits< T >::isScalar, - trueCase, - falseCase >::type >::type type; -}; - -/// Results in VigraTrueType, if both T1 and T2 are of integer type and scalar -template< typename T1, typename T2, typename trueCase, typename falseCase > -struct ifBothScalarIntegral -{ - typedef - typename ifScalarIntegral< - T1, - typename ifScalarIntegral< - T2, - trueCase, - falseCase >::type, - falseCase >::type type; -}; - -//-------------------------------------------------------------- - -/// Count number of trailing zeros -template< unsigned int val > struct numberOfTrailingZeros -{ - enum { next = val >> 1 }; - enum { value = vigra::IfBool< (val & 1) == 0, - numberOfTrailingZeros<next>, - boost::mpl::integral_c< int,-1 > > ::type::value + 1 }; -}; - -template<> struct numberOfTrailingZeros<0> -{ - enum { value = 0 }; -}; - -//-------------------------------------------------------------- - -/// Count number of one bits -template< unsigned int val > struct bitcount -{ - enum { next = val >> 1 }; - enum { value = bitcount<next>::value + (val & 1) }; -}; - -template<> struct bitcount<0> -{ - enum { value = 0 }; -}; - -//-------------------------------------------------------------- - -/// Shift left for positive shift value, and right otherwise -template< typename T > inline T shiftLeft( T v, int shift ) -{ - return shift > 0 ? v << shift : v >> (-shift); -} - -/// Shift right for positive shift value, and left otherwise -template< typename T > inline T shiftRight( T v, int shift ) -{ - return shift > 0 ? v >> shift : v << (-shift); -} - -//-------------------------------------------------------------- - -/// Replace non-std project2nd from SGI extensions -template< typename T1, typename T2 > -struct project2nd : public std::binary_function<T1, T2, T2> -{ - T2 operator() (const T1&, const T2& v) const { return v; } -}; - -} // namespace basebmp - -#endif /* INCLUDED_BASEBMP_METAFUNCTIONS_HXX */ - -/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |