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45 lines
1.8 KiB
Python
45 lines
1.8 KiB
Python
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"""
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Integer field classes:
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- UInt8, UInt16, UInt24, UInt32, UInt64: unsigned integer of 8, 16, 32, 64 bits ;
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- Int8, Int16, Int24, Int32, Int64: signed integer of 8, 16, 32, 64 bits.
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"""
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from lib.hachoir_core.field import Bits, FieldError
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class GenericInteger(Bits):
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"""
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Generic integer class used to generate other classes.
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"""
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def __init__(self, parent, name, signed, size, description=None):
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if not (8 <= size <= 256):
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raise FieldError("Invalid integer size (%s): have to be in 8..256" % size)
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Bits.__init__(self, parent, name, size, description)
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self.signed = signed
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def createValue(self):
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return self._parent.stream.readInteger(
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self.absolute_address, self.signed, self._size, self._parent.endian)
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def integerFactory(name, is_signed, size, doc):
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class Integer(GenericInteger):
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__doc__ = doc
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static_size = size
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def __init__(self, parent, name, description=None):
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GenericInteger.__init__(self, parent, name, is_signed, size, description)
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cls = Integer
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cls.__name__ = name
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return cls
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UInt8 = integerFactory("UInt8", False, 8, "Unsigned integer of 8 bits")
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UInt16 = integerFactory("UInt16", False, 16, "Unsigned integer of 16 bits")
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UInt24 = integerFactory("UInt24", False, 24, "Unsigned integer of 24 bits")
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UInt32 = integerFactory("UInt32", False, 32, "Unsigned integer of 32 bits")
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UInt64 = integerFactory("UInt64", False, 64, "Unsigned integer of 64 bits")
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Int8 = integerFactory("Int8", True, 8, "Signed integer of 8 bits")
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Int16 = integerFactory("Int16", True, 16, "Signed integer of 16 bits")
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Int24 = integerFactory("Int24", True, 24, "Signed integer of 24 bits")
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Int32 = integerFactory("Int32", True, 32, "Signed integer of 32 bits")
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Int64 = integerFactory("Int64", True, 64, "Signed integer of 64 bits")
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