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#include "utility.h"
#include <climits>
namespace opentracing {
BEGIN_OPENTRACING_ABI_NAMESPACE
namespace mocktracer {
// Converts swaps the endianness of a number.
//
// Taken from https://stackoverflow.com/a/105339/4447365
template <typename T>
static T SwapEndian(T u) {
static_assert(CHAR_BIT == 8, "CHAR_BIT != 8");
union {
T u;
unsigned char u8[sizeof(T)];
} source, dest;
source.u = u;
for (size_t k = 0; k < sizeof(T); k++)
dest.u8[k] = source.u8[sizeof(T) - k - 1];
return dest.u;
}
// Determines whether the architecture is big endian.
//
// Taken from https://stackoverflow.com/a/1001373/4447365
static bool IsBigEndian() {
union {
uint32_t i;
char c[4];
} bint = {0x01020304};
return bint.c[0] == 1;
}
uint64_t SwapEndianIfBig(uint64_t x) {
if (IsBigEndian()) {
return SwapEndian(x);
} else {
return x;
}
}
uint32_t SwapEndianIfBig(uint32_t x) {
if (IsBigEndian()) {
return SwapEndian(x);
} else {
return x;
}
}
} // namespace mocktracer
END_OPENTRACING_ABI_NAMESPACE
} // namespace opentracing
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