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

1.1       root        1: /*
                      2:  * Copyright (c) 1989 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #if defined(LIBC_SCCS) && !defined(lint)
                     21: static char sccsid[] = "@(#)strspn.c   5.7 (Berkeley) 6/1/90";
                     22: #endif /* LIBC_SCCS and not lint */
                     23: 
                     24: #include <sys/stdc.h>
                     25: #include <string.h>
                     26: 
                     27: /*
                     28:  * Span the string s2 (skip characters that are in s2).
                     29:  */
                     30: size_t
                     31: strspn(s1, s2)
                     32:        const char *s1;
                     33:        register const char *s2;
                     34: {
                     35:        register const char *p = s1, *spanp;
                     36:        register char c, sc;
                     37: 
                     38:        /*
                     39:         * Skip any characters in s2, excluding the terminating \0.
                     40:         */
                     41: cont:
                     42:        c = *p++;
                     43:        for (spanp = s2; (sc = *spanp++) != 0;)
                     44:                if (sc == c)
                     45:                        goto cont;
                     46:        return (p - 1 - s1);
                     47: }

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