Initial Commit

.gitignore

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+/.settings
+.classpath
+.project

src/main/Compiler.java

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+package main;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class Compiler {
+	
+	private String logo = "***************************\n" + 
+			"*                         *\n" + 
+			"*   Brainfuck Compiler    *\n" + 
+			"*          by             *\n" + 
+			"*        D-Lord		  *\n" + 
+			"*                         *\n" + 
+			"***************************" + "\n\n";
+	
+	private static Scanner scanner;
+	private String answer;
+	private String filename;
+	private String input;
+	private boolean isEntered;
+	private final String[] ansDir = {"directly", "d", "dir"};
+	private final String[] ansFile = {"File", "file", "f"};
+	
+	public Compiler() {
+		
+		scanner = new Scanner(System.in);
+		input = "";
+		isEntered = false;
+		
+	}
+	
+	public void init() {
+		
+		System.out.println(logo);
+		
+		while(!isEntered) {
+			
+			System.out.println("Compile code directly or from a file?");
+			
+			answer = scanner.nextLine();
+			
+			// Directly
+			
+			if(contains(ansDir, answer)) {
+				
+				isEntered = true;
+				
+				System.out.println("Please enter your brainfuck code:");
+
+				input = scanner.nextLine();
+				compile(input, scanner);
+				
+			}else if(contains(ansFile, answer)){
+				
+				// File
+				
+				isEntered = true;
+				
+				System.out.println("Enter the file name (with the file extention!). The file has to be in the same directory as this.");
+				
+				filename = scanner.nextLine();
+				input = readFileAsString(Paths.get("").toAbsolutePath().toString() + "\\" + filename);
+				compile(input, scanner);
+				
+			}else {	
+				
+				System.out.println("Wrong input. Enter either 'directly' or 'file'.");
+			}
+			
+			}
+			scanner.close();
+	}
+	
+	// This method actually compiles the brainfuck code which is stored as a string. The scanner is for the "," instruction, which gets the user-input.
+	
+	public void compile(String input, Scanner scanner) {
+		
+		// Some variables that track the position of the memory and the currently tracked character.
+		
+		/*
+		 * ----------------------------------------------
+		 * |		|		|		|		|		|
+		 * |  104	|  101	|  108  |  108  |  111  |.................
+		 * |		|		|		|		|		|
+		 * ----------------------------------------------
+		 * 
+		 * 				↑	
+		 * 			 memPos
+		 * 
+		 * 
+		 * 
+		 * 	++++++++[>++++[   .........
+		 * 
+		 * 			↑
+		 * 		   pos
+		 * */
+		
+		ArrayList<Integer> mem = new ArrayList<Integer>();
+		int memPos = 0;
+		int pos = 0;
+		
+		int b_counter = 0;
+		
+		char[] inputArr = input.toCharArray();
+		
+		int p_counter = 1;
+		int m_counter = 1;
+		int arr1_counter = 1;
+		int arr2_counter = 1;
+		
+		while(pos < input.length()) {
+			
+			// The instructions.
+			
+			//System.out.println(mem.toString());
+			
+			while(mem.size() <= memPos) {
+				
+				mem.add(0);
+			}
+			
+			switch(inputArr[pos]) {
+			
+			case '>':
+				
+				while(inputArr[pos + 1] == '>') {
+					arr1_counter++;
+					pos++;
+				}
+				
+				memPos+=arr1_counter;
+				arr1_counter = 1;
+				
+				break;
+				
+			case '<':
+				if(memPos > 0) {
+					
+					while(inputArr[pos + 1] == '<') {
+						arr2_counter++;
+						pos++;
+					}
+
+					memPos-=arr2_counter;
+					
+					arr2_counter = 1;
+					} 
+				else {
+					System.err.print("Outside of the band");
+					}
+				break;
+				
+			case '+':
+				
+				while(inputArr[pos + 1] == '+') {
+					p_counter++;
+					pos++;
+				}
+				
+				mem.set(memPos, (mem.get(memPos) + p_counter));
+				p_counter = 1;
+				break;
+				
+			case '-':
+				
+				while(inputArr[pos + 1] == '-') {
+					m_counter++;
+					pos++;
+				}
+				
+				mem.set(memPos, (mem.get(memPos) - m_counter));
+				m_counter = 1;
+				
+				break;
+			
+			case '[':
+				
+				if(inputArr[pos + 1] == '-' && inputArr[pos + 2] == ']') {
+					
+					mem.set(memPos, 0);
+					pos+=2; 
+					break;
+				}
+				if(mem.get(memPos) == 0) {
+					pos++; 
+                    while (b_counter > 0 || inputArr[pos] != ']') 
+                    { 
+                        if (inputArr[pos] == '[') {
+                            b_counter++; }
+                        else if (inputArr[pos] == ']') {
+                            b_counter--; }
+                        pos++; 
+				}
+				}
+				break;
+				
+			case ']':
+				
+				if(mem.get(memPos) != 0) {
+					pos--; 
+                    while (b_counter > 0 || inputArr[pos] != '[') 
+                    { 
+                        if (inputArr[pos] == ']') {
+                            b_counter++; }
+                        else if (inputArr[pos] == '[') {
+                            b_counter--; }
+                        pos--; 
+                    } 
+                    pos--;
+				}
+				
+				break;
+			
+			case '.':
+				System.out.print((char) ((int) mem.get(memPos)));
+				break;
+				
+			case ',':
+				System.out.print("Please enter one character: ");
+				String s_inp = scanner.nextLine();
+				
+				while(s_inp.length() != 1) {
+					System.out.println("Finally enter JUST ONE CHARACTER!!! ");
+					s_inp = scanner.nextLine();
+				}
+				
+				mem.set(memPos, (int) (s_inp.charAt(0)));
+				break;
+			}
+			pos++;
+		}
+		
+	}
+	
+	private static String readFileAsString(String fileName)
+	  { 
+	    String data = ""; 
+	    
+	    try {
+			data = new String(Files.readAllBytes(Paths.get(fileName)));
+		} catch (IOException e) {
+			e.printStackTrace();
+		} 
+	    
+	    return data; 
+	  }
+	
+	private static boolean contains(String[] arr, String testString) {
+		
+		for(int i = 0; i < arr.length; i++) {
+			
+			if(arr[i].equals(testString)) {
+				
+				return true;
+			}
+		
+		}
+		
+		return false;
+	}
+
+}

src/main/ICommand.java

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+package main;
+
+public interface ICommand {
+	
+	public void execute();
+
+}

src/main/Main.java

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+package main;
+
+public class Main {
+
+	public static void main(String[] args) {
+
+		Compiler compiler = new Compiler();
+		
+		compiler.init();
+		
+	}
+}

src/main/Navigator.java

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+package main;
+
+public class Navigator {
+
+}

src/main/NewCompiler.java

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+package main;
+
+public class NewCompiler {
+	
+	public NewCompiler() 
+	{
+		
+	}
+
+}