1 files changed, 121 insertions, 0 deletions
diff --git a/src/com/pkrandom/ctr/RomfsFile.java b/src/com/pkrandom/ctr/RomfsFile.java
new file mode 100644
index 0000000..30e9f7c
--- /dev/null
+++ b/src/com/pkrandom/ctr/RomfsFile.java
@@ -0,0 +1,121 @@
+package com.pkrandom.ctr;
+
+/*----------------------------------------------------------------------------*/
+/*--  RomfsFile.java - an entry in the romfs filesystem                     --*/
+/*--                                                                        --*/
+/*--  Part of "Universal Pokemon Randomizer ZX" by the UPR-ZX team          --*/
+/*--  Pokemon and any associated names and the like are                     --*/
+/*--  trademark and (C) Nintendo 1996-2020.                                 --*/
+/*--                                                                        --*/
+/*--  This program is free software: you can redistribute it and/or modify  --*/
+/*--  it under the terms of the GNU General Public License as published by  --*/
+/*--  the Free Software Foundation, either version 3 of the License, or     --*/
+/*--  (at your option) any later version.                                   --*/
+/*--                                                                        --*/
+/*--  This program is distributed in the hope that it will be useful,       --*/
+/*--  but WITHOUT ANY WARRANTY; without even the implied warranty of        --*/
+/*--  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the          --*/
+/*--  GNU General Public License for more details.                          --*/
+/*--                                                                        --*/
+/*--  You should have received a copy of the GNU General Public License     --*/
+/*--  along with this program. If not, see <http://www.gnu.org/licenses/>.  --*/
+/*----------------------------------------------------------------------------*/
+
+import com.pkrandom.FileFunctions;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+public class RomfsFile {
+
+    private NCCH parent;
+    public long offset;
+    public int size;
+    public String fullPath;
+    private Extracted status = Extracted.NOT;
+    private String extFilename;
+    public byte[] data;
+    public boolean fileChanged = false;
+    public long originalCRC;
+
+    public RomfsFile(NCCH parent) {
+        this.parent = parent;
+    }
+
+    public byte[] getContents() throws IOException {
+        if (this.status == Extracted.NOT) {
+            // extract file
+            parent.reopenROM();
+            RandomAccessFile rom = parent.getBaseRom();
+            byte[] buf = new byte[this.size];
+            rom.seek(this.offset);
+            rom.readFully(buf);
+            originalCRC = FileFunctions.getCRC32(buf);
+            if (parent.isWritingEnabled()) {
+                // make a file
+                String tmpDir = parent.getTmpFolder();
+                this.extFilename = fullPath.replaceAll("[^A-Za-z0-9_\\.]+", "");
+                File tmpFile = new File(tmpDir + extFilename);
+                FileOutputStream fos = new FileOutputStream(tmpFile);
+                fos.write(buf);
+                fos.close();
+                tmpFile.deleteOnExit();
+                this.status = Extracted.TO_FILE;
+                this.data = null;
+                return buf;
+            } else {
+                this.status = Extracted.TO_RAM;
+                this.data = buf;
+                byte[] newcopy = new byte[buf.length];
+                System.arraycopy(buf, 0, newcopy, 0, buf.length);
+                return newcopy;
+            }
+        } else if (this.status == Extracted.TO_RAM) {
+            byte[] newcopy = new byte[this.data.length];
+            System.arraycopy(this.data, 0, newcopy, 0, this.data.length);
+            return newcopy;
+        } else {
+            String tmpDir = parent.getTmpFolder();
+            return FileFunctions.readFileFullyIntoBuffer(tmpDir + this.extFilename);
+        }
+    }
+
+    public void writeOverride(byte[] data) throws IOException {
+        if (status == Extracted.NOT) {
+            // temp extract
+            getContents();
+        }
+        fileChanged = true;
+        size = data.length;
+        if (status == Extracted.TO_FILE) {
+            String tmpDir = parent.getTmpFolder();
+            FileOutputStream fos = new FileOutputStream(new File(tmpDir + this.extFilename));
+            fos.write(data);
+            fos.close();
+        } else {
+            if (this.data.length == data.length) {
+                // copy new in
+                System.arraycopy(data, 0, this.data, 0, data.length);
+            } else {
+                // make new array
+                this.data = null;
+                this.data = new byte[data.length];
+                System.arraycopy(data, 0, this.data, 0, data.length);
+            }
+        }
+    }
+
+    // returns null if no override
+    public byte[] getOverrideContents() throws IOException {
+        if (status == Extracted.NOT) {
+            return null;
+        }
+        return getContents();
+    }
+
+    private enum Extracted {
+        NOT, TO_FILE, TO_RAM
+    }
+}