HP C/iX Library Reference Manual (30026-90004)

358 Chapter5
HP C/iX Library Function Descriptions
swab
swab
Swaps bytes in an array.
Syntax
void swab (char * from , char * to , int nbytes );
Parameters
from A pointer to the source array.
to A pointer to the target array.
nbytes The number of bytes to copy.
Return Values
None.
Description
This function copies nbytes bytes pointed to by from to the array pointed to by to ,
exchanging adjacent even and odd bytes. It is useful for carrying binary data between
byte-swapped and non-byte-swapped machines. The
nbytes parameter should be even and
non-negative. If
nbytes is odd and positive, swab() uses nbytes-1 instead. If nbytes is
negative, swab() does nothing.