/* Copyright 1986, 1989, 1990 by Abacus Research and
 * Development, Inc.  All rights reserved.
 */

#if !defined (OMIT_RCSID_STRINGS)
char ROMlib_rcsid_bindec[] =
		    "$Id: bindec.c 63 2004-12-24 18:19:43Z ctm $";
#endif

/* Forward declarations in BinaryDecimal.h (DO NOT DELETE THIS LINE) */

#include "rsys/common.h"
#include "rsys/glue.h"

A2(PUBLIC trap, void, NumToString, LONGINT, l, StringPtr, s)
{
    register Byte *p = s+1;
    register LONGINT d;

    if (l == 0) {
	s[0] = 1;
	*p = '0';
	return;
    } else if ((uint32) l == 0x80000000L) {
	register char *q = "-2147483648";
	s[0] = 11;
	while (*q)
	    *p++ = *q++;	/* DON'T put the null byte in */
	return;	
    } else if (l < 0) {
	*p++ = '-';
	l = -l;
    }
    d = 1000000000L;
    while (!(*p = l / d))	/* must find something */
	d /= 10;
    l -= d * *p;
    d /= 10;
    *p++ += '0';
    while (d) {
	l -= (*p = l / d) * d;
	*p++ += '0';
	d /= 10;
    }
    s[0] = p - (s+1);
}

A2(PUBLIC trap, void, StringToNum, StringPtr, s, LONGINT *, lp)
{
    register char *p = (char *)s+1;
    register char *ep = p + s[0];
    register LONGINT l = 0;
    int sign = 1;

    if (p != ep) {
	if (*p == '+')
	    p++;
	else if (*p == '-') {
	    p++;
	    sign = -1;
	}
    }
    while (p != ep)
	l = l * 10 + (*p++ & 0xF);
    *lp = sign * l;
}