chartoint.c

unsigned int
chars_to_int(char * from, int start, int end) {
        /* better way : byte copy */
        unsigned int value = 0;
        unsigned char buf;
        int exp;
        int pos=start;
        for( ; pos <= end ; pos ++ ) {
                exp = (end - pos);
                buf = from[pos];
                value += buf * (1 << (8*exp)) ;
        }
        return value;
}