commit 3a781245e6dfe624a09e106f92c6222225535289
Author: Nes <riefufanz@gmail.com>
Date:   Wed Nov 20 14:44:25 2024 -0800

    Upload files to "/"

diff --git a/AT3merge.java b/AT3merge.java
new file mode 100644
index 0000000..b7dfce2
--- /dev/null
+++ b/AT3merge.java
@@ -0,0 +1,102 @@
+package goblincave.gitea.nes;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+import org.apache.commons.io.FilenameUtils;
+
+import io.github.jacksonbrienen.jwfd.JWindowsFileDialog;
+
+public class AT3merge {
+
+	public static void main(String[] args) throws IOException {
+		
+		String[] selection = JWindowsFileDialog.showMultiDialog(null, "Select AT3 files to merge");
+		boolean[] merged = new boolean[selection.length];
+				
+		// identify AT3 part files: name_01.at3, name_02.at3
+		for(int a = 0; a < selection.length; a++) {
+			
+			if(merged[a])
+				continue;
+			
+			File fileA = new File(selection[a]);
+			String filenameA = FilenameUtils.removeExtension(fileA.getName());
+			String partnameA = filenameA.substring(filenameA.length() - 3);
+			filenameA = filenameA.substring(0, filenameA.length() - 3);
+			
+			if(partnameA.equals("_01")) {
+				
+				for(int b = 0; b < selection.length; b++) {
+	
+					if(merged[b] || selection[a].equals(selection[b]))
+						continue;
+					
+					File fileB = new File(selection[b]);
+					
+					String filenameB = FilenameUtils.removeExtension(fileB.getName());
+					String partnameB = filenameB.substring(filenameB.length() - 3);
+					filenameB = filenameB.substring(0, filenameB.length() - 3);
+					
+					if(filenameA.equals(filenameB) && partnameB.equals("_02")) {
+						
+						// MERGE parts into one file
+						System.out.println("Merging " + fileA.getName() + " and " + fileB.getName());
+						
+						merge(fileA, fileB);
+						
+						merged[b] = true;
+						break;
+						
+					}
+					
+				}
+				
+				// REMOVE suffix from processed file
+				System.out.println("Renaming to " + filenameA + ".at3");
+				
+				if(fileA.renameTo(new File(fileA.getParent(), filenameA + ".at3")));
+				else System.out.println("Failed to rename " + fileA);
+				
+				merged[a] = true;
+				
+			} else continue;
+			
+		}
+		
+		// merge matching parts into a single file
+		// remove part suffixes from files
+		
+	}
+
+	/**
+	 * Appends fileB to the end of fileA. FileB is then deleted.
+	 * 
+	 * @param fileA
+	 * @param fileB
+	 * @throws IOException 
+	 */
+	private static void merge(File fileA, File fileB) throws IOException {
+
+		try (
+			FileInputStream input = new FileInputStream(fileB);
+			FileOutputStream output = new FileOutputStream(fileA, true);
+		) {
+			// append fileB
+			byte[] buffer = new byte[1024];
+			int bytesRead;
+			while((bytesRead = input.read(buffer)) != -1) {
+				output.write(buffer, 0, bytesRead);
+			}
+			
+		}
+		
+		// delete fileB
+		if(fileB.delete());
+		else System.out.println("Failed to delete " + fileB);
+		
+	}
+	
+}
diff --git a/ATXtoAT3.java b/ATXtoAT3.java
new file mode 100644
index 0000000..4962faa
--- /dev/null
+++ b/ATXtoAT3.java
@@ -0,0 +1,115 @@
+package goblincave.gitea.nes;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+import org.apache.commons.io.FilenameUtils;
+
+import io.github.jacksonbrienen.jwfd.FileExtension;
+import io.github.jacksonbrienen.jwfd.JWindowsFileDialog;
+
+public class ATXtoAT3 {
+	
+	public static void main(String[] args) throws IOException {
+		
+		FileExtension atx = new FileExtension("ATX File", "atx");
+		
+		String[] selection = JWindowsFileDialog.showMultiDialog(null, "Select ATX files to process", atx, FileExtension.ALL);
+		String output = JWindowsFileDialog.showDirectoryDialog(null, "Choose where to export AT3 files");
+		
+		if(selection == null)
+			System.out.println("No files selected.");
+		
+		else {
+			for(int i = 0; i < selection.length; i++) {
+				
+				String path = selection[i];
+				File file1 = new File(path);
+				System.out.println("Opening " + path);
+				int start = 0x20; // findChunk("RIFF", file, 0x10);
+				int end = findChunk("EOFC", file1, 0x10);
+				File AT3 = trim(file1, start, end, output);
+				
+				System.out.println("Saving " + AT3.toPath());
+			}
+		}
+		
+		System.out.println(selection.length + " files exported.");
+		
+	}
+	
+	/**
+	 * Trims input file up to start address and after end address, saving trimmed data to output path.
+	 * 
+	 * @param input
+	 * @param start
+	 * @param end
+	 * @param output
+	 * @return trimmed file
+	 */
+	private static File trim(File input, int start, int end, String output) {
+		
+		// input validation
+		// start and end must be between 0 and file length
+		// start must be less than end
+		if(start < 0 || start > input.length() || end < 0 || end > input.length() || start >= end)
+			return null;
+		
+		File trimmed = new File(output + "/" + FilenameUtils.removeExtension(input.getName()) + ".at3");
+		
+		try (
+				FileInputStream in = new FileInputStream(input); 
+				FileOutputStream out = new FileOutputStream(trimmed);
+		) {
+			in.skipNBytes(start);
+			byte[] bytes = new byte[end - start];
+			int readBytes = in.read(bytes);
+			out.write(bytes, 0, readBytes);
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		
+		return trimmed;
+		
+	}
+
+	/**
+	 * Returns the first instance of the provided key in the file.
+	 * 
+	 * @param key
+	 * @param file
+	 * @param width - search address increment value. Smaller values are more thorough, but take longer to process. Adjust according to the conventions of a given file. If unsure, use a value of 1. 
+	 * @return first match
+	 */
+	public static int findChunk(String key, File file, int width) throws IOException {
+		
+		int keyValue = asciiToInt(key);
+
+		// find address of sequence in file
+		try (RandomAccessFile RAF = new RandomAccessFile(file, "r")) {
+			for(int a = 0; a + width < file.length(); a += width) {
+				RAF.seek(a);
+				if(RAF.readInt() == keyValue) {
+					return a;
+				}
+			}
+		}
+
+		// returns -1 if not found
+		return -1;
+	}
+	
+	/**
+	 * Converts the given ASCII sequence to an equivalent integer value.
+	 */
+	private static int asciiToInt(String key) {
+		int value = 0;
+		for(int i = 0; i < key.length(); i++)
+			value += key.charAt(key.length() - 1 - i) * Math.pow(16, 2 * i);
+		return value;
+	}
+
+}