BUILDIN_FUNC(checkweight2)
{
        int nameid=-1, amount=-1, nbitems=0, weight=0;
        int i=0, amount2=0, slots=0;
        struct item_data* id = NULL;
	TBL_PC *sd = script_rid2sd(st);

	nullpo_retr(1,sd);
	
        nbitems = script_lastdata(st);
        if(nbitems%2){
            ShowError("buildin_checkweight2: Invalid nbitem='%d', must be a multiple of 2.\n", nbitems);
            script_pushint(st,0);
            return 1;
        }
        slots = pc_inventoryblank(sd);
        for(i=2; i<nbitems+1; i=i+2){
            nameid = script_getnum(st,i);
            if( (id = itemdb_exists(nameid)) == NULL )
            {
                    ShowError("buildin_checkweight2: Invalid item '%d'.\n", nameid);
                    script_pushint(st,0);
                    return 1;
            }
            amount = script_getnum(st,i+1);
            if( amount < 1 )
            {
		ShowError("buildin_checkweight2: Invalid amount '%d'.\n", amount);
		script_pushint(st,0);
		return 1;
            }
            weight += itemdb_weight(nameid)*amount;
            if( weight + sd->weight > sd->max_weight )
            {// too heavy
                    script_pushint(st,0);
                    return 0;
            }
            switch( pc_checkadditem(sd, nameid, amount) )
            {
                    case ADDITEM_EXIST: // item is already in inventory, but there is still space for the requested amount
                            break;
                    case ADDITEM_NEW:	
                            if( itemdb_isstackable(nameid) )
                            {// stackable
				    amount2++;
                                    if( slots < amount2 ){
                                            script_pushint(st,0);
					    return 0;
				    }
                            }
                            else
                            {// non-stackable
                                    amount2 += amount; //amount of new non stackables   
                                    if( slots < amount2 ){ //do we still have enough place in inventory for them
                                            script_pushint(st,0);
					    return 0;
				    }
                            }
                            break;
                    case ADDITEM_OVERAMOUNT:
                            script_pushint(st,0);
                            return 0;
            }      
        }      

	script_pushint(st,1);
	return 0;   
}