/usr/include/gecode/int/div.hpp is in libgecode-dev 4.2.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2013
*
* Last modified:
* $Date: 2013-02-19 15:42:19 +0100 (Tue, 19 Feb 2013) $ by $Author: schulte $
* $Revision: 13315 $
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
namespace Gecode { namespace Int {
template<class IntType>
forceinline IntType
ceil_div_pp(IntType x, IntType y) {
assert((x >= 0) && (y >= 0));
/*
* This is smarter than it looks: for many cpus, % and / are
* implemented by the same instruction and an optimizing compiler
* will generate the instruction only once.
*/
return ((x % y) == 0) ? x/y : (x/y + 1);
}
template<class IntType>
forceinline IntType
floor_div_pp(IntType x, IntType y) {
assert((x >= 0) && (y >= 0));
return x / y;
}
template<class IntType>
forceinline IntType
ceil_div_px(IntType x, IntType y) {
assert(x >= 0);
return (y >= 0) ? ceil_div_pp(x,y) : -floor_div_pp(x,-y);
}
template<class IntType>
forceinline IntType
floor_div_px(IntType x, IntType y) {
assert(x >= 0);
return (y >= 0) ? floor_div_pp(x,y) : -ceil_div_pp(x,-y);
}
template<class IntType>
forceinline IntType
ceil_div_xp(IntType x, IntType y) {
assert(y >= 0);
return (x >= 0) ? ceil_div_pp(x,y) : -floor_div_pp(-x,y);
}
template<class IntType>
forceinline IntType
floor_div_xp(IntType x, IntType y) {
assert(y >= 0);
return (x >= 0) ? floor_div_pp(x,y) : -ceil_div_pp(-x,y);
}
template<class IntType>
forceinline IntType
ceil_div_xx(IntType x, IntType y) {
return (x >= 0) ? ceil_div_px(x,y) : -floor_div_px(-x,y);
}
template<class IntType>
forceinline IntType
floor_div_xx(IntType x, IntType y) {
return (x >= 0) ? floor_div_px(x,y) : -ceil_div_px(-x,y);
}
}}
// STATISTICS: int-prop
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