source: buchla-68k/libsm/strpbrk.c@ c3aee8a

/*
   =============================================================================
        strpbrk.c -- find a 'break' character in a string
        Version 1 -- 1987-06-12

        Return ptr to first occurance of any character from `brkset'
        in the character string `string'; NULL if none exists.
   =============================================================================
*/

int8_t *strpbrk(int8_t *string, int8_t *brkset)
{
        register int8_t *p;

        do {

        for (p = brkset; *p != '\0' && *p != *string; ++p)
                ;

        if (*p != '\0')
                return(string);
        }

        while(*string++)
                ;

        return((int8_t *)0);
}