51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
#include <cstdlib>
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#include <limits>
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#include <nn/os.h>
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#include <sead/time/seadTickSpan.h>
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/*
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namespace sead
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{
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s64 TickSpan::cFrequency = nn::os::GetSystemTickFrequency();
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s64 TickSpan::toNanoSeconds() const
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{
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const s64 abs_span = std::abs(mSpan);
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const s64 max = std::numeric_limits<s64>::max();
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if(cFrequency == 0) {
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cFrequency = nn::os::GetSystemTickFrequency();
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}
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// Try to get as much precision as possible without overflowing.
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if (abs_span < max / 1'000'000'000)
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return 1'000'000'000 * mSpan / cFrequency;
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if (abs_span < max / 1'000'000)
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return 1000 * (1'000'000 * mSpan / cFrequency);
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if (abs_span < max / 1000)
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return 1'000'000 * (1000 * mSpan / cFrequency);
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return 1'000'000'000 * (mSpan / cFrequency);
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}
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void TickSpan::setNanoSeconds(s64 ns)
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{
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const s64 threshold = std::numeric_limits<s64>::max() / cFrequency;
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const s64 abs_ns = std::abs(ns);
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if (abs_ns <= threshold)
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mSpan = cFrequency * ns / 1'000'000'000;
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else if (abs_ns <= 1000 * threshold)
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mSpan = cFrequency * (ns / 1000) / 1'000'000;
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else if (abs_ns <= 1'000'000 * threshold)
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mSpan = cFrequency * (ns / 1'000'000) / 1000;
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else
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mSpan = cFrequency * (ns / 1'000'000'000);
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}
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} // namespace sead
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*/ |