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68 lines
1.2 KiB
C++
68 lines
1.2 KiB
C++
/* Copyright (c) 2008-2015, Avian Contributors
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Permission to use, copy, modify, and/or distribute this software
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for any purpose with or without fee is hereby granted, provided
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that the above copyright notice and this permission notice appear
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in all copies.
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There is NO WARRANTY for this software. See license.txt for
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details. */
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#ifndef AVIAN_UTIL_MATH_H
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#define AVIAN_UTIL_MATH_H
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#undef max
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#undef min
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namespace avian {
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namespace util {
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inline unsigned max(unsigned a, unsigned b)
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{
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return (a > b ? a : b);
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}
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inline unsigned min(unsigned a, unsigned b)
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{
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return (a < b ? a : b);
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}
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inline unsigned avg(unsigned a, unsigned b)
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{
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return (a + b) / 2;
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}
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inline unsigned ceilingDivide(unsigned n, unsigned d)
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{
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return (n + d - 1) / d;
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}
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inline bool powerOfTwo(unsigned n)
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{
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for (; n > 2; n >>= 1)
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if (n & 1)
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return false;
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return true;
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}
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inline unsigned nextPowerOfTwo(unsigned n)
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{
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unsigned r = 1;
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while (r < n)
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r <<= 1;
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return r;
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}
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inline unsigned log(unsigned n)
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{
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unsigned r = 0;
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for (unsigned i = 1; i < n; ++r)
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i <<= 1;
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return r;
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}
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} // namespace util
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} // namespace avian
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#endif // AVIAN_UTIL_MATH_H
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