libcruft-util/test/endian.cpp

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#include "tap.hpp"
#include "endian.hpp"
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#include <cstdint>
///////////////////////////////////////////////////////////////////////////////
int
main (void)
{
cruft::TAP::logger tap;
{
uint32_t a = 0x12345678, b = 0x78563412;
tap.expect_eq (a, cruft::bswap (b), "u32 byteswap");
}
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{
static std::uint8_t const bytes[] = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef };
tap.expect_eq (cruft::readle<std::uint64_t> (bytes), 0xefcdab8967452301, "readle<u64>");
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}
{
// try to byte swap the pattern for 1.0f
//
// it may not be the most robust test, but it'll catch the most
// egregious errors for the time being.
union {
uint32_t u;
float f;
} data { .u = 0x0000803f /* 0x3f800000 == 1.f */ };
tap.expect_eq (cruft::bswap (data.f), 1.f, "f32 byteswap");
};
return tap.status ();
}