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BinaryStream.py
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import struct
import os
from enum import Enum
class BinaryStream(object):
def __init__(self, stream):
pass
class Endianness(Enum):
BIG = 0
LITTLE = 1
NATIVE = 2
def GetEndiannes(self, endianness):
return {
BinaryStream.Endianness.BIG: '>',
BinaryStream.Endianness.LITTLE: '<',
BinaryStream.Endianness.NATIVE: '=',
}.get(endianness, BinaryStream.Endianness.NATIVE)
def Close(self):
self.stream.close()
def Flush(self):
self.stream.flush()
def BaseStream(self):
return self.stream
def Seek(self, offset, origin = os.SEEK_SET):
self.stream.seek(offset, origin)
class BinaryReader(BinaryStream):
def __init__(self, stream, endianness=BinaryStream.Endianness.NATIVE):
super(BinaryReader, self).__init__(stream)
self.stream = stream
self.endianness = BinaryStream.GetEndiannes(self, endianness)
def ReadByte(self):
return struct.unpack(self.endianness + 'B', self.stream.read(1))[0]
def ReadBool(self):
return struct.unpack(self.endianness + '?', self.stream.read(1))[0]
def ReadBytes(self, val):
return self.stream.read(val)
def ReadChar(self):
return self.stream.read(1).decode('ascii')
def ReadChars(self, num):
return self.stream.read(num).decode('ascii')
def ReadDouble(self):
return struct.unpack(self.endianness + 'd', self.stream.read(8))[0]
def ReadInt16(self):
return struct.unpack(self.endianness + 'h', self.stream.read(2))[0]
def ReadInt32(self):
return struct.unpack(self.endianness + 'i', self.stream.read(4))[0]
def ReadInt64(self):
return struct.unpack(self.endianness + 'q', self.stream.read(8))[0]
def ReadSByte(self):
return struct.unpack(self.endianness + 'b', self.stream.read(1))[0]
def ReadSingle(self):
return struct.unpack(self.endianness + 'f', self.stream.read(4))[0]
def ReadString(self):
pass
def ReadUInt16(self):
return struct.unpack(self.endianness + 'H', self.stream.read(2))[0]
def ReadUInt32(self):
return struct.unpack(self.endianness + 'I', self.stream.read(4))[0]
def ReadUInt64(self):
return struct.unpack(self.endianness + 'Q', self.stream.read(8))[0]
def Read7BitEncodedInt(self):
pass
class BinaryWriter(BinaryStream):
def __init__(self, stream, endianness=BinaryStream.Endianness.NATIVE):
super(BinaryWriter, self).__init__(stream)
self.stream = stream
self.endianness = BinaryStream.GetEndiannes(self, endianness)
def WriteBool(self, value):
self.stream.write(struct.pack(self.endianness + '?', value))
def WriteByte(self, value):
self.stream.write(struct.pack(self.endianness + 'B', value))
def WriteBytes(self, value):
self.stream.write(value)
def WriteChar(self, value):
self.stream.write(struct.pack(self.endianness + 'c', value.encode('ascii')))
def WriteChars(self, value):
self.stream.write(value.encode('ascii'))
def WriteDouble(self, value):
self.stream.write(struct.pack(self.endianness + 'd', value))
def WriteInt16(self, value):
self.stream.write(struct.pack(self.endianness + 'h', value))
def WriteInt32(self, value):
self.stream.write(struct.pack(self.endianness + 'i', value))
def WriteInt64(self, value):
self.stream.write(struct.pack(self.endianness + 'q', value))
def WriteSByte(self, value):
self.stream.write(struct.pack(self.endianness + 'b', value))
def WriteSingle(self, value):
self.stream.write(struct.pack(self.endianness + 'f', value))
def WriteString(self, value):
pass
def WriteUInt16(self, value):
self.stream.write(struct.pack(self.endianness + 'H', value))
def WriteUInt32(self, value):
self.stream.write(struct.pack(self.endianness + 'I', value))
def WriteUInt64(self, value):
self.stream.write(struct.pack(self.endianness + 'Q', value))
def Write7BitEncodedInt(self, value):
pass