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from idc import Byte
from miasm2.core.bin_stream import bin_stream_str
class bin_stream_ida(bin_stream_str):
"""
bin_stream implementation for IDA
IDA should provide Byte function
Don't generate xrange using address computation:
It can raise error on overflow 7FFFFFFF with 32 bit python
"""
def getbytes(self, start, l=1):
o = ""
for ad in xrange(l):
o += chr(Byte(ad + start - self.shift))
return o
def readbs(self, l=1):
if self.offset + l > self.l:
raise IOError
o = self.getbytes(self.offset)
self.offset += l
return p
def writebs(self, l=1):
raise ValueError('writebs unsupported')
def __str__(self):
raise NotImplementedError('Not fully functional')
def setoffset(self, val):
self.offset = val
def __len__(self):
return 0x7FFFFFFF
def getlen(self):
return 0x7FFFFFFF - self.offset - self.shift
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