45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
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/*
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* Copyright (c) 1989, 1990, 1991 by the University of Washington
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*
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* For copying and distribution information, please see the file
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* <uw-copyright.h>.
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*/
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#include <uw-copyright.h>
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/*
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* strspn - Count initial characters from chrs in s
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*
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* STRSPN counts the occurances of chacters from chrs
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* in the string s preceeding the first occurance of
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* a character not in s.
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*
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* ARGS: s - string to be checked
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* chrs - string of characters we are looking for
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*
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* RETURNS: Count of initial characters from chrs in s
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*/
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int
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strspn(s,chrs)
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char *s; /* String to search */
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char *chrs; /* String of characters we are looking for */
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{
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char *cp; /* Pointer to the current character in chrs */
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int count; /* Count of characters seen so far */
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count = 0;
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while(*s) {
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for(cp = chrs;*cp;cp++)
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if(*cp == *s) {
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s++;
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count++;
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goto done;
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}
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return(count);
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done:
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;
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}
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return(count);
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}
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