#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "tmalloc.h"
#include "galaxy.h"
#include "xgalaxy.h"


void
freeStarEntry() {
	if ( XGalaxy.entry ) 
		tfree(XGalaxy.entry);
	XGalaxy.entry=NULL;
	if ( XGalaxy.tmpentry ) 
		tfree(XGalaxy.tmpentry);
	XGalaxy.tmpentry=NULL;
	XGalaxy.nentry = XGalaxy.lenentry = 0; 
}

void
addEntry(Star *star) {
	if ( XGalaxy.nentry >= XGalaxy.lenentry ) {
		XGalaxy.lenentry = (XGalaxy.lenentry) ? XGalaxy.lenentry*2 : 16;
		XGalaxy.entry = (Star*) ((XGalaxy.entry) ? 
			trealloc(XGalaxy.entry, sizeof(Star)*XGalaxy.lenentry)
			: 
			tmalloc(sizeof(Star)*XGalaxy.lenentry));
		XGalaxy.tmpentry = (Star*) ((XGalaxy.entry) ? 
			trealloc(XGalaxy.tmpentry, sizeof(Star)*XGalaxy.lenentry)
			: 
			tmalloc(sizeof(Star)*XGalaxy.lenentry));
	}

	if ( star ) 
		memcpy(XGalaxy.entry + XGalaxy.nentry, star, sizeof(Star));
	else 
		memset(XGalaxy.entry + XGalaxy.nentry, 0, sizeof(Star));
	
	XGalaxy.nentry++;
}

void
deleteEntry(u_int32_t i) {
	if ( i>=XGalaxy.nentry || XGalaxy.nentry==0)
		return;

	if ( i!=XGalaxy.nentry-1)
		memmove( XGalaxy.entry + i, XGalaxy.entry + i + 1, sizeof(Star) * ( XGalaxy.nentry-i-1) );
	XGalaxy.nentry--;
}

void
editEntry(u_int32_t i, int col, double val) {
	if ( i>=XGalaxy.nentry )
		return;
	switch(col) {
		case 1:  XGalaxy.entry[i].mass = val; break;
		case 2:  XGalaxy.entry[i].c.x = val; break;
		case 3:  XGalaxy.entry[i].c.y = val; break;
		case 4:  XGalaxy.entry[i].c.z = val; break;
		case 5:  XGalaxy.entry[i].v.x = val; break;
		case 6:  XGalaxy.entry[i].v.y = val; break;
		case 7:  XGalaxy.entry[i].v.z = val; break;
		default: break;
	}
}

void
cntEntry() {
	Galaxy galaxy;
	char buf[128];

	memset(&galaxy,0,sizeof(galaxy));

	galaxy.stars = XGalaxy.entry;
	galaxy.nstars = XGalaxy.nentry;

	EnergyImpulseGalaxy(&galaxy);

	sprintf(buf,"%G",galaxy.kineticEnergy + galaxy.potentialEnergy);
	gtk_label_set_text( GTK_LABEL(XGalaxy.dataEnergyField), buf);

	sprintf(buf,"%G",galaxy.Impulse);
	gtk_label_set_text( GTK_LABEL(XGalaxy.dataImpulseField), buf);

	sprintf(buf,"%G",galaxy.Moment);
	gtk_label_set_text( GTK_LABEL(XGalaxy.dataMomentField), buf);
}