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Add signed versions of `swapOrder()` functions

This commit is contained in:
Martchus 2023-02-05 20:40:54 +01:00
parent 66621d757b
commit 31f369d051
2 changed files with 34 additions and 1 deletions
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32
conversion/binaryconversion.h
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@ -2,12 +2,12 @@
#define CONVERSION_UTILITIES_BINARY_CONVERSION_H
#include "../global.h"
#include "../misc/traits.h"
#include <cstdint>
// use helpers from bits header if available instead of custom code using bit operations
#if __cplusplus >= 202002L
#include "../misc/traits.h"
#include <bit>
#endif
@ -167,6 +167,36 @@ CPP_UTILITIES_EXPORT constexpr std::uint64_t swapOrder(std::uint64_t value)
| ((value & 0x000000000000FF00) << (5 * 8)) | ((value) << (7 * 8));
}
/*!
* \brief Swaps the byte order of the specified 16-bit integer.
*/
CPP_UTILITIES_EXPORT constexpr std::int16_t swapOrder(std::int16_t value)
{
return static_cast<std::int16_t>(((static_cast<std::uint16_t>(value) >> 8) & 0x00FF) | ((static_cast<std::uint16_t>(value) << 8) & 0xFF00));
}
/*!
* \brief Swaps the byte order of the specified 32-bit integer.
*/
CPP_UTILITIES_EXPORT constexpr std::int32_t swapOrder(std::int32_t value)
{
return static_cast<std::int32_t>((static_cast<std::uint32_t>(value) >> 24) | ((static_cast<std::uint32_t>(value) & 0x00FF0000) >> 8)
| ((static_cast<std::uint32_t>(value) & 0x0000FF00) << 8) | (static_cast<std::uint32_t>(value) << 24));
}
/*!
* \brief Swaps the byte order of the specified 64-bit integer.
*/
CPP_UTILITIES_EXPORT constexpr std::int64_t swapOrder(std::int64_t value)
{
return static_cast<std::int64_t>((static_cast<std::uint64_t>(value) >> (7 * 8))
| ((static_cast<std::uint64_t>(value) & 0x00FF000000000000) >> (5 * 8))
| ((static_cast<std::uint64_t>(value) & 0x0000FF0000000000) >> (3 * 8))
| ((static_cast<std::uint64_t>(value) & 0x000000FF00000000) >> (1 * 8))
| ((static_cast<std::uint64_t>(value) & 0x00000000FF000000) << (1 * 8))
| ((static_cast<std::uint64_t>(value) & 0x0000000000FF0000) << (3 * 8))
| ((static_cast<std::uint64_t>(value) & 0x000000000000FF00) << (5 * 8)) | ((static_cast<std::uint64_t>(value)) << (7 * 8)));
}
#endif
/*!

3
tests/conversiontests.cpp
View File

@ -27,6 +27,9 @@ static_assert(toNormalInt(383) == 255, "toNormalInt()");
static_assert(swapOrder(static_cast<std::uint16_t>(0xABCD)) == 0xCDAB, "swapOrder(std::uint16_t)");
static_assert(swapOrder(static_cast<std::uint32_t>(0xABCDEF12u)) == 0x12EFCDABu, "swapOrder(std::uint32_t)");
static_assert(swapOrder(static_cast<std::uint64_t>(0xABCDEF1234567890ul)) == 0x9078563412EFCDABul, "swapOrder(std::uint64_t)");
static_assert(swapOrder(static_cast<std::int16_t>(0xABCD)) == static_cast<std::int16_t>(0xCDAB), "swapOrder(std::int16_t)");
static_assert(swapOrder(static_cast<std::int32_t>(0xABCDEF12)) == 0x12EFCDAB, "swapOrder(std::int32_t)");
static_assert(swapOrder(static_cast<std::int64_t>(0xABCDEF1234567890l)) == static_cast<std::int64_t>(0x9078563412EFCDABl), "swapOrder(std::int64_t)");
/*!
* \brief The ConversionTests class tests classes and functions provided by the files inside the conversion directory.