/*
	Little Smalltalk

		number definitions
		timothy a. budd, 10/84
*/
/*
	The source code for the Little Smalltalk System may be freely
	copied provided that the source of all files is acknowledged
	and that this condition is copied with each file.

	The Little Smalltalk System is distributed without responsibility
	for the performance of the program and without any guarantee of
	maintenance.

	All questions concerning Little Smalltalk should be addressed to:

		Professor Tim Budd
		Department of Computer Science
		The University of Arizona
		Tucson, Arizona
		85721
		USA
*/
# include <stdio.h>
# include "object.h"
# include "number.h"

# define MAXLOW 100	/* maximum low numbers kept */

static integer *low_nums[MAXLOW];  /* better be initialized to zero ! */

static mstruct *fr_integer = 0;
static mstruct *fr_float = 0;

static integer init_itable[INTINITMAX];

int_init() {
	integer *p;
	mstruct *new;
	int i;

	for (p = init_itable, i = 0; i < INTINITMAX; i++, p++) {
		new = (mstruct *) p;
		new->mlink = fr_integer;
		/*fprintf(stderr,"init int %d %d\n", new, new->mlink);*/
		fr_integer = new;
		}
}

int ca_int = 0;	/* count the number of integer allocations */

extern object *o_magnitude;
extern object *o_number;

/* new_cori - new character or integer */
object *new_cori(val, type)
int val, type;
{	register integer *new;

	if ((type == 1) && (val >= 0 && val < MAXLOW) && low_nums[val])
		return( (struct obj_struct *) low_nums[val]);

	if (fr_integer) {
		new = (integer *) fr_integer;
		/*fprintf(stderr,"int off list %d %d\n", fr_integer,
		fr_integer->mlink);*/
		fr_integer = fr_integer->mlink;
		}
	else {
		new = structalloc(integer);
		/*fprintf(stderr,"allocating new int %d\n", new);*/
		ca_int++;
		}

	new->i_ref_count = 0;
	new->i_value = val;
	switch(type) {
		case 0: /* chars */
			new->i_size = CHARSIZE;
		  	break;

		case 1: /* integers */
			new->i_size = INTEGERSIZE;
			if (val >= 0 && val < MAXLOW)
				sassign(low_nums[val], new);
		  	break;

		default: cant_happen(5);
		}
	return ((object *) new);
}

free_integer(i)
integer *i;
{
	if ((! is_integer(i)) && (! is_character(i)))
		cant_happen(8);
	((mstruct *) i)->mlink = fr_integer;
	fr_integer = (mstruct *) i;
	/*fprintf(stderr,"freeing integer %d %d\n", fr_integer,
	fr_integer->mlink);*/
}

free_low_nums()
{	int i;

	for (i = 0; i < MAXLOW; i++)
		if (low_nums[i]) {
			obj_dec((object *) low_nums[i]);
			low_nums[i] = NULL;
			}
}

int ca_float = 0;

/* new_float - produce a new floating point number */
object *new_float(val)
double val;
{	register sfloat *new;

	if (fr_float) {
		new = (sfloat *) fr_float;
		fr_float = fr_float->mlink;
		}
	else {
		new = structalloc(sfloat);
		ca_float++;
		}

	new->f_ref_count = 0;
	new->f_size = FLOATSIZE;
	new->f_value = val;
	return( (object *) new);
}

free_float(f)
sfloat *f;
{
	if (! is_float(f))
		cant_happen(8);
	((mstruct *) f)->mlink = fr_float;
	fr_float = (mstruct *) f;
}