Copies bytes.
Standard C Library (libc.a)
#include <unistd.h>void swab ( From, To, NumberOfBytes)
const void *From;
void *To;
ssize_t NumberOfBytes;
The swab subroutine copies the number of bytes pointed to by the NumberOfBytes parameter from the location pointed to by the From parameter to the array pointed to by the To parameter, exchanging adjacent even and odd bytes.
The NumberOfBytes parameter should be even and nonnegative. If the NumberOfBytes parameter is odd and positive, the swab subroutine uses NumberOfBytes -1 instead. If the NumberOfBytes parameter is negative, the swab subroutine does nothing.
| Item | Description |
|---|---|
| From | Points to the location of data to be copied. |
| To | Points to the array to which the data is to be copied. |
| NumberOfBytes | Specifies the number of even and nonnegative bytes to be copied. |