/* * 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 #ifdef WIN32 #ifdef max #undef max #endif #ifdef min #undef min #endif #endif #include <OS/enter-scope.h> /* * Common math operations on built-in types. */ #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; } #endif