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Annotation of 43BSDReno/lib/libc/string/strncat.c, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1990 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Chris Torek.
        !             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[] = "@(#)strncat.c  5.5 (Berkeley) 5/17/90";
        !            25: #endif /* LIBC_SCCS and not lint */
        !            26: 
        !            27: #include <sys/stdc.h>
        !            28: #include <string.h>
        !            29: 
        !            30: /*
        !            31:  * Concatenate src on the end of dst.  At most strlen(dst)+n+1 bytes
        !            32:  * are written at dst (at most n+1 bytes being appended).  Return dst.
        !            33:  */
        !            34: char *
        !            35: strncat(dst, src, n)
        !            36:        char *dst;
        !            37:        const char *src;
        !            38:        register size_t n;
        !            39: {
        !            40:        if (n != 0) {
        !            41:                register char *d = dst;
        !            42:                register const char *s = src;
        !            43: 
        !            44:                while (*d != 0)
        !            45:                        d++;
        !            46:                do {
        !            47:                        if ((*d = *s++) == 0)
        !            48:                                break;
        !            49:                        d++;
        !            50:                } while (--n != 0);
        !            51:                *d = 0;
        !            52:        }
        !            53:        return (dst);
        !            54: }

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