/usr/include/simgear/sg_inlines.h is in libsimgear-dev 3.4.0-3.
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 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | /**
* \file sg_inlines.h
* Various inline template definitions.
*/
// Written by Norman Vine, started June 2000.
//
// Copyright (C) 2000 Norman Vine - nhv@cape.com
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
#ifndef _SG_INLINES_H
#define _SG_INLINES_H
// return the sign of a value
template <class T>
inline int SG_SIGN(const T x) {
return x < T(0) ? -1 : 1;
}
// return the minimum of two values
template <class T>
inline T SG_MIN2(const T a, const T b) {
return a < b ? a : b;
}
// return the minimum of three values
template <class T>
inline T SG_MIN3( const T a, const T b, const T c) {
return (a < b ? SG_MIN2 (a, c) : SG_MIN2 (b, c));
}
// return the maximum of two values
template <class T>
inline T SG_MAX2(const T a, const T b) {
return a > b ? a : b;
}
// return the maximum of three values
template <class T>
inline T SG_MAX3 (const T a, const T b, const T c) {
return (a > b ? SG_MAX2 (a, c) : SG_MAX2 (b, c));
}
// return the minimum and maximum of three values
template <class T>
inline void SG_MIN_MAX3 ( T &min, T &max, const T a, const T b, const T c) {
if( a > b ) {
if( a > c ) {
max = a;
min = SG_MIN2 (b, c);
} else {
max = c;
min = SG_MIN2 (a, b);
}
} else {
if( b > c ) {
max = b;
min = SG_MIN2 (a, c);
} else {
max = c;
min = SG_MIN2 (a, b);
}
}
}
// swap two values
template <class T>
inline void SG_SWAP( T &a, T &b) {
T c = a; a = b; b = c;
}
// clamp a value to lie between min and max
template <class T>
inline void SG_CLAMP_RANGE(T &x, const T min, const T max ) {
if ( x < min ) { x = min; }
if ( x > max ) { x = max; }
}
// normalize a value to lie between min and max
template <class T>
inline void SG_NORMALIZE_RANGE( T &val, const T min, const T max ) {
T step = max - min;
while( val >= max ) val -= step;
while( val < min ) val += step;
}
// avoid an 'unused parameter' compiler warning.
#define SG_UNUSED(x) (void)x
// easy way to disable the copy constructor and assignment operator
// on an object
#define SG_DISABLE_COPY(Class) \
Class(const Class &); \
Class &operator=(const Class &);
#endif // _SG_INLINES_H
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