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STRSPN.C
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1993-01-04
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640b
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/* File : strspn.c
Author : Richard A. O'Keefe.
Updated: 11 April 1984
Defines: strspn()
strspn(s1, s2) returns the length of the longest prefix of s1
consisting entirely of characters in s2. NUL is not considered to
be in s2, and _str2set will not include it in the set.
*/
#include "strings.h"
#include "_str2set.h"
int strspn(str, set)
register _char_ *str;
char *set;
{
register int L;
_str2set(set);
for (L = 0; _set_vec[*str++] == _set_ctr; L++) ;
return L;
}