Migrated first 6 gists.

unknytt.py/README.md

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+File extractor for Knytt Stories story files updated for Python 3. Originally from here: https://nifflas.lp1.nl/index.php?topic=2685.0

unknytt.py/unknytt.py

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+#!/usr/bin/python
+
+import struct
+import os
+import sys
+
+def readheader(f):
+    magic = f.read(2)
+    if magic == b'':
+        raise EOFError
+    if magic != b'NF':
+        raise ValueError("Bad header")
+    nextchar = f.read(1)
+    name = []
+    while nextchar != b'\0':
+        name.append(nextchar.decode())
+        nextchar = f.read(1)
+    name = ''.join(name)
+    sizedata = f.read(4)
+    (size,) = struct.unpack('<L', sizedata)
+    return name, size
+
+def extractfile(f, destdir='.'):
+    try:
+        name, size = readheader(f)
+    except EOFError:
+        return False
+    
+    outfilename = os.path.join(destdir, *name.split('\\'))
+    
+    print("Extracting %s (%s bytes).." % (name, size))
+    
+    outdir, dummy = os.path.split(outfilename)
+    try:
+        os.makedirs(outdir)
+    except OSError:
+        pass
+    
+    outfile = open(outfilename, 'wb')
+    bytestowrite = size
+    while bytestowrite > 0:
+        data = f.read(min(bytestowrite, 4096))
+        if data == '':
+            raise EOFError("file ended prematurely")
+        outfile.write(data)
+        bytestowrite -= len(data)
+    
+    return True
+
+def unknytt(f, worlddir='.'):
+    try:
+        name, dummy = readheader(f)
+    except EOFError:
+        raise ValueError("not a valid knytt stories file")
+    
+    print("Creating %s\\" % name)
+    destdir = os.path.join(worlddir, name)
+    os.mkdir(destdir)
+    
+    while extractfile(f, destdir):
+        pass
+    
+    print("Everything is ok.")
+
+if __name__ == '__main__':
+    f = open(sys.argv[1], 'rb')
+    unknytt(f)