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Annotation of 43BSD/lib/libc/gen/swab.c, revision 1.1

1.1     ! root        1: #if defined(LIBC_SCCS) && !defined(lint)
        !             2: static char sccsid[] = "@(#)swab.c     5.3 (Berkeley) 3/9/86";
        !             3: #endif LIBC_SCCS and not lint
        !             4: 
        !             5: /*
        !             6:  * Swab bytes
        !             7:  * Jeffrey Mogul, Stanford
        !             8:  */
        !             9: 
        !            10: swab(from, to, n)
        !            11:        register char *from, *to;
        !            12:        register int n;
        !            13: {
        !            14:        register unsigned long temp;
        !            15:        
        !            16:        n >>= 1; n++;
        !            17: #define        STEP    temp = *from++,*to++ = *from++,*to++ = temp
        !            18:        /* round to multiple of 8 */
        !            19:        while ((--n) & 07)
        !            20:                STEP;
        !            21:        n >>= 3;
        !            22:        while (--n >= 0) {
        !            23:                STEP; STEP; STEP; STEP;
        !            24:                STEP; STEP; STEP; STEP;
        !            25:        }
        !            26: }

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