_swab

Swaps bytes.

void_swab(char*src,char*dest,intn**);**

For additional compatibility information, see Compatibility in the Introduction.

Libraries

Return Value

None

Parameters

src

Data to be copied and swapped

dest

Storage location for swapped data

n

Number of bytes to be copied and swapped

Remarks

The _swab function copies n bytes from src, swaps each pair of adjacent bytes, and stores the result at dest. The integer n should be an even number to allow for swapping. _swab is typically used to prepare binary data for transfer to a machine that uses a different byte order.

Example

/* SWAB.C illustrates:
 *      _swab
 */

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

char from[] = "BADCFEHGJILKNMPORQTSVUXWZY";
char to[] =   "..........................";

void main()
{
    printf( "Before:\t%s\n\t%s\n\n", from, to );
    _swab( from, to, sizeof( from ) );
    printf( "After:\t%s\n\t%s\n\n", from, to );
}

Output

Before:   BADCFEHGJILKNMPORQTSVUXWZY
   ..........................

After:   BADCFEHGJILKNMPORQTSVUXWZY
   ABCDEFGHIJKLMNOPQRSTUVWXYZ

Buffer Manipulation Routines