swab — swap bytes
The swab() function shall copy nbytes bytes, which are pointed to by src, to the object pointed to by dest, exchanging adjacent bytes. The nbytes argument should be even. If nbytes is odd, swab() copies and exchanges nbytes-1 bytes and the disposition of the last byte is unspecified. If copying takes place between objects that overlap, the behavior is undefined. If nbytes is negative, swab() does nothing.
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No errors are defined.
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XBD <unistd.h>
First released in Issue 1. Derived from Issue 1 of the SVID.
The restrict keyword is added to the swab() prototype for alignment with the ISO/IEC 9899:1999 standard.
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