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32 lines
1,002 B
C++
32 lines
1,002 B
C++
#ifndef INCLUDED_UTIL_BITCAST_H
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#define INCLUDED_UTIL_BITCAST_H
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#include <stdexcept>
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#include <cstring>
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namespace Util
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{
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#if __cplusplus >= 202002L
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#include <bit>
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#define FloatAsInt32(x) std::bit_cast<int32_t>(x)
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#define Int32AsFloat(x) std::bit_cast<float>(x)
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#define Uint32AsFloat(x) std::bit_cast<float>(x)
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#else
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template <class Dest, class Source>
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inline Dest bit_cast(Source const& source) {
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static_assert(sizeof(Dest) == sizeof(Source), "size of destination and source objects must be equal");
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static_assert(std::is_trivially_copyable<Dest>::value, "destination type must be trivially copyable.");
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static_assert(std::is_trivially_copyable<Source>::value, "source type must be trivially copyable");
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Dest dest;
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std::memcpy(&dest, &source, sizeof(dest));
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return dest;
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}
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#define FloatAsInt32(x) bit_cast<int32_t,float>(x)
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#define Int32AsFloat(x) bit_cast<float,int32_t>(x)
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#define Uint32AsFloat(x) bit_cast<float,uint32_t>(x)
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#endif
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} // Util
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#endif // INCLUDED_UTIL_BITCAST_H
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