53 lines
1.3 KiB
Python
53 lines
1.3 KiB
Python
#!/usr/bin/env python3
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from struct import unpack
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class BinaryReader(object):
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def __init__(self, data):
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self.data = data
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self.cursor = 0
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def _check_eof(self, size):
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if self.cursor + size > len(self.data):
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raise EOFError('Attempted to read past the end of internal data buffer')
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def _read_internal(self, fmt, size):
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self._check_eof(size)
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data_to_unpack = self.data[self.cursor:self.cursor + size]
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self.cursor += size
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return unpack(fmt, data_to_unpack)[0]
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def read_uint8(self):
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return self._read_internal('<B', 1)
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def read_uint16(self):
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return self._read_internal('<H', 2)
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def read_uint32(self):
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return self._read_internal('<L', 4)
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def read_uint64(self):
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return self._read_internal('<Q', 8)
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def read_int8(self):
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return self._read_internal('<b', 1)
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def read_int16(self):
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return self._read_internal('<h', 2)
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def read_int32(self):
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return self._read_internal('<l', 4)
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def read_int64(self):
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return self._read_internal('<q', 8)
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def read_bytes(self, size=-1):
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if size < 0:
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data = self.data[self.cursor:]
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else:
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self._check_eof(size)
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data = self.data[self.cursor:self.cursor + size]
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self.cursor += len(data)
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return data
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