49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
#pragma once
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#include <cstring>
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#include <basis/seadTypes.h>
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namespace sead
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{
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// This does not actually seem to exist in Nintendo's sead, but for convenience reasons and to
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// easily avoid UB let's pretend this exists.
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namespace BitUtil
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{
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inline void* addOffset(const void* ptr, intptr_t offset)
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{
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return reinterpret_cast<void*>(uintptr_t(ptr) + offset);
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}
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// Convenience function to avoid UB.
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// Nintendo appears to perform type punning, but we care about UB.
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template <typename To, typename From>
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inline To bitCast(From value)
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{
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static_assert(sizeof(To) == sizeof(From), "To and From must have the same size");
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To result;
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std::memcpy(&result, &value, sizeof(value));
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return result;
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}
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// Convenience function to avoid UB.
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// Nintendo appears to perform type punning, but we care about UB.
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template <typename To>
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inline To bitCastPtr(const void* value, intptr_t offset = 0)
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{
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To result;
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std::memcpy(&result, addOffset(value, offset), sizeof(To));
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return result;
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}
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// Convenience function to avoid UB.
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// Nintendo appears to perform type punning, but we care about UB.
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template <typename To, typename From>
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inline void bitCastWrite(const From& value, To* ptr)
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{
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static_assert(sizeof(To) == sizeof(From), "To and From must have the same size");
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std::memcpy(ptr, &value, sizeof(To));
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}
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} // namespace BitUtil
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} // namespace sead
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