From 815467a8a0672f18266537c902c7ad6a6a937505 Mon Sep 17 00:00:00 2001
From: Uttarayan Mondal <uttarayan21@gmail.com>
Date: Fri, 29 Jan 2021 18:21:44 +0530
Subject: [PATCH] Initial Commit

---
 README.md | 20 ++++++++++++++++++++
 dr2mds.py | 21 +++++++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 README.md
 create mode 100755 dr2mds.py

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..379a76b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,20 @@
+## Drastic to MelonDS
+
+This script will convert the dsv save from drastic emulator to a melonDS save file
+
+How this works ?
+
+MelonDS determines save type using exact byte count in the save file
+Which needs to be a power of 2 as mentioned [here](http://melonds.kuribo64.net/faq.php).
+This script calculates the closest power of 2 to the save file and removes the padding
+
+This can be easily done manually by removing the padding using a hex editor.
+Or using dd like this
+
+```bash
+dd if=Pokemon.dsv of=Pokemon.sav bs=1 count=524288
+```
+
+This will make a 4KiB EEPROM save from drastic to melonDS save.
+
+I will add argparse later.
diff --git a/dr2mds.py b/dr2mds.py
new file mode 100755
index 0000000..18fc91a
--- /dev/null
+++ b/dr2mds.py
@@ -0,0 +1,21 @@
+#!/usr/bin/python3
+
+from math import log
+import os
+
+DRASTIC_SAVE="Pokemon Black.dsv"
+MELONDS_SAVE="Pokemon Black.sav"
+
+def st_size(path):
+    return os.stat(path).st_size
+
+def closest2pow(n):
+    return 2**int(log(n) / log(2))
+
+def drastic2melonds(infile,outfile):
+    with open(infile,"rb") as inf, open(outfile,"wb") as ouf:
+        
+        ouf.write(inf.read(closest2pow(st_size(infile))))
+
+if __name__ == "__main__":
+    drastic2melonds(DRASTIC_SAVE,MELONDS_SAVE)