1 files changed, 86 insertions, 0 deletions
diff --git a/scripts/shadacat.py b/scripts/shadacat.py
new file mode 100755
index 0000000000..4ff493bfbc
--- /dev/null
+++ b/scripts/shadacat.py
@@ -0,0 +1,86 @@
+#!/usr/bin/env python3.4
+
+import os
+import sys
+import codecs
+
+from enum import Enum
+from datetime import datetime
+from functools import reduce
+
+import msgpack
+
+
+class EntryTypes(Enum):
+  Unknown = -1
+  Missing = 0
+  Header = 1
+  SearchPattern = 2
+  SubString = 3
+  HistoryEntry = 4
+  Register = 5
+  Variable = 6
+  GlobalMark = 7
+  Jump = 8
+  BufferList = 9
+  LocalMark = 10
+  Change = 11
+
+
+def strtrans_errors(e):
+  if not isinstance(e, UnicodeDecodeError):
+    raise NotImplementedError('don’t know how to handle {0} error'.format(
+      e.__class__.__name__))
+  return '<{0:x}>'.format(reduce((lambda a, b: a*0x100+b),
+                                 list(e.object[e.start:e.end]))), e.end
+
+
+codecs.register_error('strtrans', strtrans_errors)
+
+
+def idfunc(o):
+    return o
+
+
+class CharInt(int):
+    def __repr__(self):
+        return super(CharInt, self).__repr__() + ' (\'%s\')' % chr(self)
+
+
+ctable = {
+    bytes: lambda s: s.decode('utf-8', 'strtrans'),
+    dict: lambda d: dict((mnormalize(k), mnormalize(v)) for k, v in d.items()),
+    list: lambda l: list(mnormalize(i) for i in l),
+    int: lambda n: CharInt(n) if 0x20 <= n <= 0x7E else n,
+}
+
+
+def mnormalize(o):
+  return ctable.get(type(o), idfunc)(o)
+
+
+fname = sys.argv[1]
+poswidth = len(str(os.stat(fname).st_size or 1000))
+
+
+with open(fname, 'rb') as fp:
+  unpacker = msgpack.Unpacker(file_like=fp, read_size=1)
+  max_type = max(typ.value for typ in EntryTypes)
+  while True:
+    try:
+      pos = fp.tell()
+      typ = unpacker.unpack()
+    except msgpack.OutOfData:
+      break
+    else:
+      timestamp = unpacker.unpack()
+      time = datetime.fromtimestamp(timestamp)
+      length = unpacker.unpack()
+      if typ > max_type:
+        entry = fp.read(length)
+        typ = EntryTypes.Unknown
+      else:
+        entry = unpacker.unpack()
+        typ = EntryTypes(typ)
+      print('%*u %13s %s %5u %r' % (
+        poswidth, pos, typ.name, time.isoformat(), length, mnormalize(entry)))