fsfw/serialize/EndianSwapper.h

88 lines
2.1 KiB
C++

#ifndef ENDIANSWAPPER_H_
#define ENDIANSWAPPER_H_
#include <framework/osal/Endiness.h>
#include <cstring>
#include <iostream>
class EndianConverter {
private:
EndianConverter() {};
public:
/**
* Swap the endianness of a variable with arbitrary type
* @tparam T Type of variable
* @param in variable
* @return Variable with swapped endianness
*/
template<typename T>
static T convertBigEndian(T in) {
#ifndef BYTE_ORDER_SYSTEM
#error BYTE_ORDER_SYSTEM not defined
#elif BYTE_ORDER_SYSTEM == LITTLE_ENDIAN
T tmp;
uint8_t *pointerOut = (uint8_t*) &tmp;
uint8_t *pointerIn = (uint8_t*) &in;
for (uint8_t count = 0; count < sizeof(T); count++) {
pointerOut[sizeof(T) - count - 1] = pointerIn[count];
}
return tmp;
#elif BYTE_ORDER_SYSTEM == BIG_ENDIAN
return in;
#else
#error Unknown Byte Order
#endif
}
static void convertBigEndian(uint8_t *out, const uint8_t *in,
uint32_t size) {
#ifndef BYTE_ORDER_SYSTEM
#error BYTE_ORDER_SYSTEM not defined
#elif BYTE_ORDER_SYSTEM == LITTLE_ENDIAN
for (uint8_t count = 0; count < size; count++) {
out[size - count - 1] = in[count];
}
return;
#elif BYTE_ORDER_SYSTEM == BIG_ENDIAN
memcpy(out, in, size);
return;
#endif
}
template<typename T>
static T convertLittleEndian(T in) {
#ifndef BYTE_ORDER_SYSTEM
#error BYTE_ORDER_SYSTEM not defined
#elif BYTE_ORDER_SYSTEM == BIG_ENDIAN
T tmp;
uint8_t *pointerOut = (uint8_t *) &tmp;
uint8_t *pointerIn = (uint8_t *) &in;
for (uint8_t count = 0; count < sizeof(T); count++) {
pointerOut[sizeof(T) - count - 1] = pointerIn[count];
}
return tmp;
#elif BYTE_ORDER_SYSTEM == LITTLE_ENDIAN
return in;
#else
#error Unknown Byte Order
#endif
}
static void convertLittleEndian(uint8_t *out, const uint8_t *in,
uint32_t size) {
#ifndef BYTE_ORDER_SYSTEM
#error BYTE_ORDER_SYSTEM not defined
#elif BYTE_ORDER_SYSTEM == BIG_ENDIAN
for (uint8_t count = 0; count < size; count++) {
out[size - count - 1] = in[count];
}
return;
#elif BYTE_ORDER_SYSTEM == LITTLE_ENDIAN
memcpy(out, in, size);
return;
#endif
}
};
#endif /* ENDIANSWAPPER_H_ */