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| /* |
| * 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; |
| } |
| } |
| } |