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#!/usr/bin/env python3
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]
try:
filt = sys.argv[2]
except IndexError:
def filt(entry): return True
else:
_filt = filt
def filt(entry): return eval(_filt, globals(), {'entry': entry}) # noqa
poswidth = len(str(os.stat(fname).st_size or 1000))
class FullEntry(dict):
def __init__(self, val):
self.__dict__.update(val)
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)
full_entry = FullEntry({
'value': entry,
'timestamp': timestamp,
'time': time,
'length': length,
'pos': pos,
'type': typ,
})
if not filt(full_entry):
continue
print('%*u %13s %s %5u %r' % (
poswidth, pos, typ.name, time.isoformat(), length, mnormalize(entry)))
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