/usr/include/OS/math.h is in ivtools-dev 1.2.11a1-2.
This file is owned by root:root, with mode 0o644.
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* Copyright (c) 1991 Stanford University
* Copyright (c) 1991 Silicon Graphics, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that (i) the above copyright notices and this permission notice appear in
* all copies of the software and related documentation, and (ii) the names of
* Stanford and Silicon Graphics may not be used in any advertising or
* publicity relating to the software without the specific, prior written
* permission of Stanford and Silicon Graphics.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL STANFORD OR SILICON GRAPHICS BE LIABLE FOR
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef os_math_h
#define os_math_h
#include <OS/enter-scope.h>
/*
* Common math operations on built-in types.
*/
#undef min
#undef max
#define declare_binary_minmax(Type) \
static Type min(Type a, Type b); \
static Type max(Type a, Type b)
#define implement_binary_minmax(Type) \
inline Type Math::min(Type a, Type b) { return a < b ? a : b; } \
inline Type Math::max(Type a, Type b) { return a > b ? a : b; }
#define declare_4_minmax(Type) \
static Type min(Type a, Type b, Type c, Type d); \
static Type max(Type a, Type b, Type c, Type d)
/*
* Compiler isn't smart enough to figure out how to do a 4-way min inline
* with single nested if-then-else.
*/
#define implement_4_minmax(Type) \
inline Type Math::min(Type a, Type b, Type c, Type d) { \
Type r1 = min(a, b), r2 = min(c, d); \
return min(r1, r2); \
} \
\
inline Type Math::max(Type a, Type b, Type c, Type d) { \
Type r1 = max(a, b), r2 = max(c, d); \
return max(r1, r2); \
}
class Math {
public:
declare_binary_minmax(int);
declare_binary_minmax(unsigned);
declare_binary_minmax(long);
declare_binary_minmax(unsigned long);
declare_binary_minmax(float);
declare_binary_minmax(double);
declare_4_minmax(int);
declare_4_minmax(float);
declare_4_minmax(double);
static int abs(int);
static long abs(long);
static double abs(double);
static int round(float);
static int round(double);
static boolean equal(float x, float y, float e);
static boolean equal(double x, double y, double e);
};
implement_binary_minmax(int)
implement_binary_minmax(unsigned)
implement_binary_minmax(long)
implement_binary_minmax(unsigned long)
implement_binary_minmax(float)
implement_binary_minmax(double)
implement_4_minmax(int)
implement_4_minmax(float)
implement_4_minmax(double)
inline int Math::round(float x) { return x > 0 ? int(x+0.5) : -int(-x+0.5); }
inline int Math::round(double x) { return x > 0 ? int(x+0.5) : -int(-x+0.5); }
inline boolean Math::equal(float x, float y, float e) {
return x - y < e && y - x < e;
}
inline boolean Math::equal(double x, double y, double e) {
return x - y < e && y - x < e;
}
#ifndef M_PI
const double M_PI = 3.14159265358979323846; // per CRC handbook, 14th. ed.
#endif
#ifndef M_PI_2
const double M_PI_2 = (M_PI/2.0); // PI/2
#endif
#ifndef M2_PI
const double M2_PI = (M_PI*2.0); // PI*2
#endif
inline float degrees(float rad) { return rad * (float)(180 / M_PI); }
inline float radians(float deg) { return deg * (float)(M_PI / 180); }
inline double degrees(double rad) { return rad * (180 / M_PI); }
inline double radians(double deg) { return deg * (M_PI / 180); }
#endif
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