bits.c

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#include <jwsc/config.h>

#include <stdlib.h>
#include <stdio.h>
#include <inttypes.h>

#include "jwsc/base/bits.h"


void bswap_u16(uint16_t* x)
{
    *x = (*x>>8) | 
         (*x<<8);
}


void bswap_u32(uint32_t* x)
{
    *x = (*x>>24) | 
         ((*x<<8) & 0x00FF0000) |
         ((*x>>8) & 0x0000FF00) |
         (*x<<24);
}


void bswap_u64(uint64_t* x)
{
    uint64_t a = 0xFF;

    *x = (*x>>56) | 
         ((*x<<40) & (a<<48)) |
         ((*x<<24) & (a<<40)) |
         ((*x<<8)  & (a<<32)) |
         //((*x<<40) & 0x00FF000000000000) |
         //((*x<<24) & 0x0000FF0000000000) |
         //((*x<<8)  & 0x000000FF00000000) |
         ((*x>>8)  & 0x00000000FF000000) |
         ((*x>>24) & 0x0000000000FF0000) |
         ((*x>>40) & 0x000000000000FF00) |
         (*x<<56);
}