Return to swab.c CVS log

Up to [CSRG BSD Unix] / 43BSDReno / lib / libc / string

Annotation of 43BSDReno/lib/libc/string/swab.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1988 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * This code is derived from software contributed to Berkeley by
                      6:  * Jeffrey Mogul.
                      7:  *
                      8:  * Redistribution and use in source and binary forms are permitted provided
                      9:  * that: (1) source distributions retain this entire copyright notice and
                     10:  * comment, and (2) distributions including binaries display the following
                     11:  * acknowledgement:  ``This product includes software developed by the
                     12:  * University of California, Berkeley and its contributors'' in the
                     13:  * documentation or other materials provided with the distribution and in
                     14:  * all advertising materials mentioning features or use of this software.
                     15:  * Neither the name of the University nor the names of its contributors may
                     16:  * be used to endorse or promote products derived from this software without
                     17:  * specific prior written permission.
                     18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     21:  */
                     22: 
                     23: #if defined(LIBC_SCCS) && !defined(lint)
                     24: static char sccsid[] = "@(#)swab.c     5.8 (Berkeley) 6/27/90";
                     25: #endif /* LIBC_SCCS and not lint */
                     26: 
                     27: #include <string.h>
                     28: 
                     29: void
                     30: swab(from, to, n)
                     31:        register char *from, *to;
                     32:        register int n;
                     33: {
                     34:        register unsigned long temp;
                     35: 
                     36:        n >>= 1; n++;
                     37: #define        STEP    temp = *from++,*to++ = *from++,*to++ = temp
                     38:        /* round to multiple of 8 */
                     39:        while ((--n) & 07)
                     40:                STEP;
                     41:        n >>= 3;
                     42:        while (--n >= 0) {
                     43:                STEP; STEP; STEP; STEP;
                     44:                STEP; STEP; STEP; STEP;
                     45:        }
                     46: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.