def read_xpress(self, baddr, BlockSize):
data_uz = self.PageCache.Get(baddr)
if data_uz is None:
data_read = self.base.read(baddr, BlockSize)
if BlockSize == 0x10000:
data_uz = data_read
else:
data_uz = xpress.xpress_decode(data_read)
self.PageCache.Put(baddr, data_uz)
return data_uz
def read_xpress(self, baddr, BlockSize):
data_uz = self.PageCache.Get(baddr)
if data_uz is None:
data_read = self.base.read(baddr, BlockSize)
if BlockSize == 0x10000:
data_uz = data_read
else:
data_uz = xpress.xpress_decode(data_read)
self.PageCache.Put(baddr, data_uz)
return data_uz
def convert_to_raw(self, ofile):
page_count = 0
for _i, xb in enumerate(self.PageDict.keys()):
size = self.PageDict[xb][0][1]
data_z = self.base.read(xb + 0x20, size)
if size == 0x10000:
data_uz = data_z
else:
data_uz = xpress.xpress_decode(data_z)
for page, size, offset in self.PageDict[xb]:
ofile.seek(page * 0x1000)
ofile.write(data_uz[offset * 0x1000:offset * 0x1000 + 0x1000])
page_count += 1
del data_z, data_uz
yield page_count
def convert_to_raw(self, ofile):
page_count = 0
for _i, xb in enumerate(self.PageDict.keys()):
size = self.PageDict[xb][0][1]
data_z = self.base.read(xb + 0x20, size)
if size == 0x10000:
data_uz = data_z
else:
data_uz = xpress.xpress_decode(data_z)
for page, size, offset in self.PageDict[xb]:
ofile.seek(page * 0x1000)
ofile.write(data_uz[offset * 0x1000 : offset * 0x1000 + 0x1000])
page_count += 1
del data_z, data_uz
yield page_count
def decompress(self, descriptor, data):
if len(data) == PAGE_SIZE:
# In case the compressed size is larger than a page, the data
# Does not seem to be compressed, so we just return data.
return data
if descriptor.st_data_mgr.CompressionAlgorithm.v() != XPRESS_ALGO:
return None
try:
length = descriptor.record.CompressedSize.v() & 0xFFF
result = xpress.xpress_decode(data[:length])
except Exception as e:
self.debug("Error decompressing: {0}".format(str(e)))
return None
len_decompressed = len(result)
if len_decompressed != PAGE_SIZE:
self.debug("Decompressed data is not the "
"size of a page: {0:#x}".format(len_decompressed))
return None
return result
