strpbrk.c

Many C samples. It is a good sample for students to learn C language.

/*  File   : strpbrk.c
    Author : Richard A. O'Keefe.
    Updated: 11 April 1984
    Defines: strpbrk()

    strpbrk(s1, s2) returns NullS if no character of s2 occurs in s1, or
    a pointer to the first character of s1 which occurs in s2  if  there
    is one.  It generalises strchr (v7=index).  It wouldn't be useful to
    consider NUL as part of s2, as that would occur in every s1.
*/

#include "strings.h"
#include "_str2set.h"

char *strpbrk(str, set)
    register _char_ *str;
    char *set;
    {
	_str2set(set);
	while (_set_vec[*str] != _set_ctr)
	    if (!*str++) return NullS;
	return str;
    }