/*
 * itou -- convert nbr to unsigned decimal string of width sz
 *             right adjusted, blank filled ; returns str
 *
 *            if sz > 0 terminate with null byte
 *            if sz  =  0 find end of string
 *            if sz < 0 use last byte for data
 */

#include <stdio.h>

#pragma proto HDRPRTYPE

int itou(int nbr, char str[], int sz);

#pragma unproto HDRPRTYPE



itou(nbr, str, sz)
int nbr ;
char str[] ;
int sz ;
{
        int lowbit ;

        if ( sz > 0 )
                str[--sz] = NULL ;
        else if ( sz < 0 )
                        sz = -sz ;
                else
                        while ( str[sz] != NULL )
                                ++sz ;
        while ( sz ) {
                lowbit = nbr & 1 ;
                nbr = (nbr >> 1) & 0x7fff ;  /* divide by 2 */
                str[--sz] = ( (nbr%5) << 1 ) + lowbit + '0' ;
                if ( (nbr/=5) == 0 )
                        break ;
        }
        while ( sz )
                str[--sz] = ' ' ;
        return str ;
}