helpers.h

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#ifndef HELPERS_H_
#define HELPERS_H_

#include <inttypes.h>

#if defined(__APPLE_CC__)
#define IS_BIG_ENDIAN
#endif

#if defined WORDS_BIGENDIAN || defined IS_BIG_ENDIAN
// We must ensure that the entity is unsigned
// otherwise, if it is signed/negative, the MSB will be
// propagated when we shift
#define LITTLE_TO_NATIVE16(x) (((((uint16_t) x) & 0xFF) << 8) | \
                               (((uint16_t) x) >> 8))
#define LITTLE_TO_NATIVE32(x) (((((uint32_t) x) & 0xFF) << 24) | \
                               (((((uint32_t) x) >> 8) & 0xFF) << 16) | \
                               (((((uint32_t) x) >> 16) & 0xFF) << 8) | \
                               (((uint32_t) x) >> 24))

#define BIG_TO_NATIVE16(x) x
#define BIG_TO_NATIVE32(x) x
#else
#define LITTLE_TO_NATIVE16(x) x
#define LITTLE_TO_NATIVE32(x) x
#define BIG_TO_NATIVE16(x) (((((uint16_t) x) & 0xFF) << 8) | \
                               (((uint16_t) x) >> 8))
#define BIG_TO_NATIVE32(x) (((((uint32_t) x) & 0xFF) << 24) | \
                               (((((uint32_t) x) >> 8) & 0xFF) << 16) | \
                               (((((uint32_t) x) >> 16) & 0xFF) << 8) | \
                               (((uint32_t) x) >> 24))


#endif



#endif

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