Return to strstr.c CVS log

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

Annotation of 43BSDReno/lib/libc/string/strstr.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
        !             9:  * provided that: (1) source distributions retain this entire copyright
        !            10:  * notice and comment, and (2) distributions including binaries display
        !            11:  * the following acknowledgement:  ``This product includes software
        !            12:  * developed by the University of California, Berkeley and its contributors''
        !            13:  * in the documentation or other materials provided with the distribution
        !            14:  * and in all advertising materials mentioning features or use of this
        !            15:  * software. Neither the name of the University nor the names of its
        !            16:  * contributors may be used to endorse or promote products derived
        !            17:  * from this software without specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            19:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            20:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  */
        !            22: 
        !            23: #if defined(LIBC_SCCS) && !defined(lint)
        !            24: static char sccsid[] = "@(#)strstr.c   5.1 (Berkeley) 5/15/90";
        !            25: #endif /* LIBC_SCCS and not lint */
        !            26: 
        !            27: #include <string.h>
        !            28: #include <sys/stdc.h>
        !            29: 
        !            30: /*
        !            31:  * Find the first occurrence of find in s.
        !            32:  */
        !            33: char *
        !            34: strstr(s, find)
        !            35:        register const char *s, *find;
        !            36: {
        !            37:        register char c, sc;
        !            38:        register size_t len;
        !            39: 
        !            40:        if ((c = *find++) != 0) {
        !            41:                len = strlen(find);
        !            42:                do {
        !            43:                        do {
        !            44:                                if ((sc = *s++) == 0)
        !            45:                                        return (NULL);
        !            46:                        } while (sc != c);
        !            47:                } while (strncmp(s, find, len) != 0);
        !            48:                s--;
        !            49:        }
        !            50:        return ((char *)s);
        !            51: }

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