_swab
Swaps bytes.
void _swab(
char *src,
char *dest,
int n
);
Parameters
src
Data to be copied and swapped.dest
Storage location for swapped data.n
Number of bytes to be copied and swapped.
Remarks
If n is even, the _swab function copies n bytes from src, swaps each pair of adjacent bytes, and stores the result at dest. If n is odd, _swab copies and swaps the first n-1 bytes of src. _swab is typically used to prepare binary data for transfer to a machine that uses a different byte order.
Requirements
Routine |
Required header |
|---|---|
_swab |
<stdlib.h> |
For additional compatibility information, see Compatibility in the Introduction.
Example
// crt_swab.c
#include <stdlib.h>
#include <stdio.h>
char from[] = "BADCFEHGJILKNMPORQTSVUXWZY";
char to[] = "..........................";
int main()
{
printf( "Before: %s\n %s\n\n", from, to );
_swab( from, to, sizeof( from ) );
printf( "After: %s\n %s\n\n", from, to );
}
Before: BADCFEHGJILKNMPORQTSVUXWZY
..........................
After: BADCFEHGJILKNMPORQTSVUXWZY
ABCDEFGHIJKLMNOPQRSTUVWXYZ
.NET Framework Equivalent
Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.