strpbrk

   NAME
    strpbrk - search for specific character(s) (tokens) in string

   SYNOPSIS
    char *ptr = strpbrk(s, toks)
    const char *s;
    char *toks;

   FUNCTION
    Searches the string s for any character in the string toks.  For
    example, when searching for whitespace in s, toks would contain the
    space and tab character.

    If no character in s matches any character in toks then NULL is
    returned.

   EXAMPLE
    #include <stdio.h>
    #include <string.h>
    #include <assert.h>

    main()
    {
        char *s = "This  tis a test";
        char *ptr;

        ptr = strpbrk(s, " t");
        assert(ptr == s + 4);

        ptr = strpbrk(ptr + 1, " t");
        assert(ptr == s + 5);

        ptr = strpbrk(ptr + 1, " t");
        assert(ptr == s + 6);

        ptr = strpbrk(ptr + 1, " t");
        assert(ptr == s + 9);

        ptr = strpbrk(ptr + 1, "xyz");  /*  doesn't find 'm */
        assert(ptr == NULL);

        return(0);
    }

   INPUTS
    char *s;    pointer to string to scan
    char *toks; pointer to string containing tokens to scan for

   RESULTS
    char *ptr;  pointer to point in s where the character matches
            any character in toks, or NULL if s was exhausted.

   SEE ALSO
    strtok