package allocation;
import java.util.Scanner;

public class MallocSimulator {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		FreeList list = new FreeList(1024);
		int answer;
		int address;
		
		do {
			System.out.println("1. Allocate memory");
			System.out.println("2. Free memory");
			System.out.println("3. Print free list");
			System.out.println("4. Quit");			
			System.out.print("Enter choice: ");
			answer = in.nextInt();
			System.out.println();
			
			switch(answer) {
			case 1:
				System.out.print("Bytes to allocate: ");
				int bytes = in.nextInt();
				address = list.allocate(bytes);
				if(address < 0)
					System.out.println("Allocation failed.");
				else
					System.out.println("Allocation succeeded! Address: " + address);
				break;
			case 2:
				System.out.print("Address to free: ");
				address = in.nextInt();
				if(list.free(address))
					System.out.println("Free succeeded!");
				else
					System.out.println("Free failed. Invalid address.");
				break;
			case 3:
				list.print();				
				break;				
			}
			
			System.out.println();
			
		} while(answer != 4);
	}
}