Subversion Repositories Code-Repo

/*

 * CS 3114 Project 1

 * Author: Kevin Lee

 * Compiler: Eclipse 3.7.0

 * Operating System: Windows 7 x64

 * Date Completed: 9/1/2011

 * 

 * The following program is designed to provide an interface to

 * client side code that allows the client to store and retrieve

 * byte arrays of data. The memory manager has no information on

 * the actual data to be stored, other than the size of the byte

 * array. The memory manager allocates a memory pool when the

 * object is created, and executes all operations on the memory

 * pool. The memory manager also keeps a doubly linked list of

 * empty blocks from which it finds the best fit block to store

 * the passed data in. The client is responsible for parsing the

 * command file as well as creating the byte array holding the 

 * data to be stored. The client also has a record array which

 * stores handles passed back from the memory manager from which

 * it uses to retrieve stored data from the memory manager.

 * 

 * The stored data is saved in the following format:

 * byte[0] = size of data record

 * byte[1-4] = int (x-coordinate)

 * byte[5-8] = int (y-coordinate)

 * byte[9-?] = string (name of city name)

 * The first byte is only used by the memory manager and is not

 * returned to the client when the data record is retrieved.

 * 

 * On my honor:

 *

 * - I have not used source code obtained from another student,

 * or any other unauthorized source, either modified or

 * unmodified.

 *

 * - All source code and documentation used in my program is

 * either my original work, or was derived by me from the

 * source code published in the textbook for this course.

 *

 * - I have not discussed coding details about this project with

 * anyone other than my partner (in the case of a joint

 * submission), instructor, ACM/UPE tutors or the TAs assigned

 * to this course. I understand that I may discuss the concepts

 * of this program with other students, and that another student

 * may help me debug my program so long as neither of us writes

 * anything during the discussion or modifies any computer file

 * during the discussion. I have violated neither the spirit nor

 * letter of this restriction.

 */

import java.io.*;

public class memman {

	public static void main(String[] args) {

		int input_poolSize; // Size of memory pool to allocate

		int input_numRecs; // Total number of records to hold

		String input_commandFile; // Location of file to parse

		// 3 arguments must be supplied to the program

		if (args.length != 3) {

			System.out.println("3 Arguments must be supplied!");

			return;

		}

		// Parses passed arguments into member variables

		try {

			input_poolSize = Integer.parseInt(args[0]);

			input_numRecs = Integer.parseInt(args[1]);

			input_commandFile = args[2];

		} catch (NumberFormatException e) {

			System.out.printf("The first two arguments must be an integer");

			return;

		}

		// Handles error if the passed arguments are negative numbers

		if (input_poolSize < 0 || input_numRecs < 0) {

			System.out.printf("Int arguments cannot be negative");

			return;

		}

		// Check to make sure the command file exists

		File cmdFile = new File(input_commandFile);

		if (!cmdFile.exists()) {

			System.out.printf("Command file not found");

			return;

		}

		MemClient memoryClient = new MemClient(input_numRecs, input_poolSize);

		// Parse each command with the memory client

		try {

			BufferedReader reader = new BufferedReader(new FileReader(cmdFile));

			String cin;

			while ((cin = reader.readLine()) != null) {

				cin = cin.trim();

				if (cin.length() != 0) {

					memoryClient.processLine(cin);

				}

			}

		} catch (FileNotFoundException e) {

			System.out.printf("Command file not found");

			return;

		} catch (IOException e) {

			System.out.printf("Unable to read input file");

			return;

		}

	}

}