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128 lines
3.0 KiB
C++
128 lines
3.0 KiB
C++
//
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// Storage.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 10/07/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#ifndef Storage_hpp
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#define Storage_hpp
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#include "../NumberTheory/Factors.hpp"
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namespace Storage {
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/*!
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Contains either an absolute time or a time interval, described as a quotient, in terms of a
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clock rate to which the time is relative and its length in cycles based on that clock rate.
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*/
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struct Time {
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unsigned int length, clock_rate;
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Time() : length(0), clock_rate(1) {}
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/*!
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Reduces this @c Time to its simplest form — eliminates all common factors from @c length
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and @c clock_rate.
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*/
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inline Time &simplify()
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{
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unsigned int common_divisor = NumberTheory::greatest_common_divisor(length, clock_rate);
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length /= common_divisor;
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clock_rate /= common_divisor;
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return *this;
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}
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/*!
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@returns the floating point conversion of this @c Time. This will often be less precise.
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*/
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inline float get_float()
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{
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return (float)length / (float)clock_rate;
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}
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inline bool operator < (Time other)
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{
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return other.clock_rate * length < clock_rate * other.length;
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}
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inline Time operator + (Time other)
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{
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Time result;
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result.clock_rate = NumberTheory::least_common_multiple(clock_rate, other.clock_rate);
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result.length = length * (result.clock_rate / clock_rate) + other.length * (result.clock_rate / other.clock_rate);
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return result;
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}
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inline Time &operator += (Time other)
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{
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unsigned int combined_clock_rate = NumberTheory::least_common_multiple(clock_rate, other.clock_rate);
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length = length * (combined_clock_rate / clock_rate) + other.length * (combined_clock_rate / other.clock_rate);
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clock_rate = combined_clock_rate;
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return *this;
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}
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inline Time operator - (Time other)
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{
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Time result;
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result.clock_rate = NumberTheory::least_common_multiple(clock_rate, other.clock_rate);
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result.length = length * (result.clock_rate / clock_rate) - other.length * (result.clock_rate / other.clock_rate);
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return result;
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}
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inline Time operator -= (Time other)
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{
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unsigned int combined_clock_rate = NumberTheory::least_common_multiple(clock_rate, other.clock_rate);
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length = length * (combined_clock_rate / clock_rate) - other.length * (combined_clock_rate / other.clock_rate);
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clock_rate = combined_clock_rate;
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return *this;
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}
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inline Time operator * (Time other)
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{
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Time result;
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result.clock_rate = clock_rate * other.clock_rate;
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result.length = length * other.length;
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return result;
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}
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inline Time &operator *= (Time other)
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{
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length *= other.length;
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clock_rate *= other.clock_rate;
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return *this;
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}
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inline Time operator / (Time other)
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{
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Time result;
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result.clock_rate = clock_rate * other.length;
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result.length = length * other.clock_rate;
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return result;
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}
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inline Time &operator /= (Time other)
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{
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length *= other.clock_rate;
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clock_rate *= other.length;
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return *this;
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}
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inline void set_zero()
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{
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length = 0;
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clock_rate = 1;
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}
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inline void set_one()
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{
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length = 1;
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clock_rate = 1;
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}
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};
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}
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#endif /* Storage_h */
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