#include <stdio.h>
#include <stdlib.h>
#include <grass/gis.h>
#include "sw_defs.h"

int freeinit (struct Freelist *fl, int size)
{
fl -> head = (struct Freenode *) NULL;
fl -> nodesize = size;
return 0;
}

char *getfree (struct Freelist *fl)
{
int i; struct Freenode *t;
if(fl->head == (struct Freenode *) NULL)
{	t =  (struct Freenode *) myalloc(sqrt_nsites * fl->nodesize);
	for(i=0; i<sqrt_nsites; i+=1) 	
		makefree((struct Freenode *)((char *)t+i*fl->nodesize), fl);
};
t = fl -> head;
fl -> head = (fl -> head) -> nextfree;
return((char *)t);
}

int makefree (struct Freenode *curr, struct Freelist *fl)
{
curr->nextfree = fl -> head;
fl->head = curr;
return 0;
}

int total_alloc;
char *
myalloc (unsigned n)
{
char *t;
if ((t=G_malloc (n)) == (char *) 0)
{    fprintf(stderr,"Insufficient memory processing site %d (%d bytes in use)\n",
		siteidx, total_alloc);
     exit(0);
};
total_alloc += n;
return(t);
}