124190Skre /* 2*42190Sbostic * Copyright (c) 1989 The Regents of the University of California. 334479Sbostic * All rights reserved. 434479Sbostic * 534479Sbostic * Redistribution and use in source and binary forms are permitted 634831Sbostic * provided that the above copyright notice and this paragraph are 734831Sbostic * duplicated in all such forms and that any documentation, 834831Sbostic * advertising materials, and other materials related to such 934831Sbostic * distribution and use acknowledge that the software was developed 1034831Sbostic * by the University of California, Berkeley. The name of the 1134831Sbostic * University may not be used to endorse or promote products derived 1234831Sbostic * from this software without specific prior written permission. 1334831Sbostic * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 1434831Sbostic * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15*42190Sbostic * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 1624190Skre */ 1724190Skre 1826537Sdonn #if defined(LIBC_SCCS) && !defined(lint) 19*42190Sbostic static char sccsid[] = "@(#)strspn.c 5.6 (Berkeley) 05/17/90"; 2034479Sbostic #endif /* LIBC_SCCS and not lint */ 2124190Skre 22*42190Sbostic #include <sys/stdc.h> 2342181Sbostic #include <string.h> 2442181Sbostic 25*42190Sbostic /* 26*42190Sbostic * Span the string s2 (skip characters that are in s2). 27*42190Sbostic */ 28*42190Sbostic size_t 29*42190Sbostic strspn(s1, s2) 30*42190Sbostic const char *s1; 31*42190Sbostic register const char *s2; 3224190Skre { 33*42190Sbostic register const char *p = s1, *spanp; 34*42190Sbostic register char c, sc; 3524190Skre 36*42190Sbostic /* 37*42190Sbostic * Skip any characters in s2, excluding the terminating \0. 38*42190Sbostic */ 39*42190Sbostic cont: 40*42190Sbostic c = *p++; 41*42190Sbostic for (spanp = s2; (sc = *spanp++) != 0;) 42*42190Sbostic if (sc == c) 43*42190Sbostic goto cont; 44*42190Sbostic return (p - 1 - s1); 4524190Skre } 46