mirror of
https://github.com/mon/kbinxml.git
synced 2026-03-22 02:15:37 -05:00
94 lines
2.4 KiB
Python
94 lines
2.4 KiB
Python
from struct import *
|
|
|
|
class ByteBuffer():
|
|
def __init__(self, input = b'', offset = 0, endian = '>'):
|
|
if isinstance(input, bytearray):
|
|
self.data = input
|
|
else:
|
|
self.data = bytearray(input)
|
|
self.endian = endian
|
|
self.offset = offset
|
|
self.end = len(self.data)
|
|
|
|
def _format_type(self, type, count):
|
|
if count is None:
|
|
return self.endian + type
|
|
else:
|
|
return self.endian + str(count) + type
|
|
|
|
def get(self, type, count = None):
|
|
ret = self.peek(type, count)
|
|
size = calcsize(type)
|
|
if count is not None:
|
|
size *= count
|
|
self.offset += size
|
|
return ret
|
|
|
|
def peek(self, type, count = None):
|
|
fmt = self._format_type(type, count)
|
|
ret = unpack(fmt, self.data[self.offset:self.offset+calcsize(fmt)])
|
|
return ret[0] if count is None else ret
|
|
|
|
def append(self, data, type, count = None):
|
|
fmt = self._format_type(type, count)
|
|
self.offset += calcsize(fmt)
|
|
if isinstance(data, list):
|
|
self.data.extend(pack(fmt, *data))
|
|
else:
|
|
self.data.extend(pack(fmt, data))
|
|
|
|
def set(self, data, offset, type, count = None):
|
|
fmt = self._format_type(type, count)
|
|
if isinstance(data, list):
|
|
pack_into(fmt, self.data, offset, *data)
|
|
else:
|
|
pack_into(fmt, self.data, offset, data)
|
|
self.offset += calcsize(fmt)
|
|
|
|
def hasData(self):
|
|
return self.offset < self.end
|
|
|
|
def __len__(self):
|
|
return len(self.data)
|
|
|
|
typeMap = {
|
|
's8' : 'b',
|
|
's16' : 'h',
|
|
's32' : 'i',
|
|
's64' : 'q',
|
|
'u8' : 'B',
|
|
'u16' : 'H',
|
|
'u32' : 'I',
|
|
'u64' : 'Q'
|
|
}
|
|
|
|
def _make_get(fmt):
|
|
def _method(self):
|
|
return self.get(fmt)
|
|
return _method
|
|
|
|
def _make_peek(fmt):
|
|
def _method(self):
|
|
return self.peek(fmt)
|
|
return _method
|
|
|
|
def _make_append(fmt):
|
|
def _method(self, data):
|
|
return self.append(data, fmt)
|
|
return _method
|
|
|
|
def _make_set(fmt):
|
|
def _method(self, data, offset):
|
|
return self.set(data, offset, fmt)
|
|
return _method
|
|
|
|
for name, fmt in typeMap.iteritems():
|
|
_get = _make_get(fmt)
|
|
_peek = _make_peek(fmt)
|
|
_append = _make_append(fmt)
|
|
_set = _make_set(fmt)
|
|
setattr(ByteBuffer, 'get_' + name, _get)
|
|
setattr(ByteBuffer, 'peek_' + name, _peek)
|
|
setattr(ByteBuffer, 'append_' + name, _append)
|
|
setattr(ByteBuffer, 'set_' + name, _set)
|