sbgSwap.h

Go to the documentation of this file.

 
#ifndef SBG_SWAP_H
#define SBG_SWAP_H
 
//----------------------------------------------------------------------//
//- Header (open extern C block)                                       -//
//----------------------------------------------------------------------//
#ifdef __cplusplus
extern "C" {
#endif
        
#include <sbgCommon.h>
 
//----------------------------------------------------------------------//
//- Internal swap functions                                            -//
//----------------------------------------------------------------------//
 
SBG_INLINE uint16_t sbgSwap16(uint16_t x)
{
        return ((x<<8)|(x>>8));
}
 
SBG_INLINE uint32_t sbgSwap32(uint32_t x)
{
        return ((x << 24) | ((x << 8) & (0xFF0000)) | ((x >> 8) & (0xFF00)) | (x >> 24));
}
 
SBG_INLINE uint64_t sbgSwap64(uint64_t x)
{
        uint32_t hi, lo;
 
        //
        // Separate into high and low 32-bit values
        //
        lo = (uint32_t)(x&0xFFFFFFFF);
        x >>= 32;
        hi = (uint32_t)(x&0xFFFFFFFF);
 
        //
        // Swap each part and rebuild our 64 bit vale
        //
        x = sbgSwap32(lo);
        x <<= 32;
        x |= sbgSwap32(hi);
 
        return x;
}
 
SBG_INLINE float sbgSwapFloat(float val)
{
        FloatNint       tmpFloat;
 
        //
        // We use a union to do the type punning
        //
        tmpFloat.valF = val;
        tmpFloat.valU = sbgSwap32(tmpFloat.valU);
 
        //
        // Return the swapped float
        //
        return tmpFloat.valF;
}
 
SBG_INLINE double sbgSwapDouble(double val)
{
        DoubleNint      tmpDouble;
 
        //
        // We use a union to do the type punning
        //
        tmpDouble.valF = val;
        tmpDouble.valU = sbgSwap64(tmpDouble.valU);
 
        //
        // Return the swapped double
        //
        return tmpDouble.valF;
}
 
//----------------------------------------------------------------------//
//- Footer (close extern C block)                                      -//
//----------------------------------------------------------------------//
#ifdef __cplusplus
}
#endif
 
#endif /* SBG_SWAP_H */