libcryfs/implementations/onblocks/utils/Math.h

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#pragma once
#ifndef MESSMER_BLOBSTORE_IMPLEMENTATIONS_ONBLOCKS_UTILS_MATH_H_
#define MESSMER_BLOBSTORE_IMPLEMENTATIONS_ONBLOCKS_UTILS_MATH_H_
#include <cstdint>
#include <cmath>
namespace blobstore {
namespace onblocks {
namespace utils {
template<typename INT_TYPE>
inline INT_TYPE intPow(INT_TYPE base, INT_TYPE exponent) {
INT_TYPE result = 1;
for(INT_TYPE i = 0; i < exponent; ++i) {
result *= base;
}
return result;
}
template<typename INT_TYPE>
inline INT_TYPE ceilDivision(INT_TYPE dividend, INT_TYPE divisor) {
return (dividend + divisor - 1)/divisor;
}
template<typename INT_TYPE>
inline INT_TYPE maxZeroSubtraction(INT_TYPE minuend, INT_TYPE subtrahend) {
if (minuend < subtrahend) {
return 0u;
}
return minuend-subtrahend;
}
template<typename INT_TYPE>
inline INT_TYPE ceilLog(INT_TYPE base, INT_TYPE value) {
return std::ceil((long double)std::log(value)/(long double)std::log(base));
}
}
}
}
#endif