3 <<swab>>---swap adjacent bytes
7 void swab(const void *<[in]>, void *<[out]>, ssize_t <[n]>);
10 void swab(<[in]>, <[out]>, <[n]>
16 This function copies <[n]> bytes from the memory region
17 pointed to by <[in]> to the memory region pointed to by
18 <[out]>, exchanging adjacent even and odd bytes.
21 <<swab>> requires no supporting OS subroutines.
27 _DEFUN (swab, (b1, b2, length),
32 const char *from = b1;
35 for (ptr = 1; ptr < length; ptr += 2)
42 if (ptr == length) /* I.e., if length is odd, */
43 to[ptr-1] = 0; /* then pad with a NUL. */