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# Copyright (c) 2016 Google, Inc
# Written by Simon Glass <sjg@chromium.org>
#
# SPDX-License-Identifier: GPL-2.0+
#
# Entry-type module for blobs, which are binary objects read from files
#
from entry import Entry
import fdt_util
import tools
class Entry_blob(Entry):
def __init__(self, image, etype, node):
Entry.__init__(self, image, etype, node)
self._filename = fdt_util.GetString(self._node, "filename", self.etype)
def ObtainContents(self):
self._filename = self.GetDefaultFilename()
self._pathname = tools.GetInputFilename(self._filename)
self.ReadContents()
return True
def ReadContents(self):
with open(self._pathname) as fd:
# We assume the data is small enough to fit into memory. If this
# is used for large filesystem image that might not be true.
# In that case, Image.BuildImage() could be adjusted to use a
# new Entry method which can read in chunks. Then we could copy
# the data in chunks and avoid reading it all at once. For now
# this seems like an unnecessary complication.
self.data = fd.read()
self.contents_size = len(self.data)
return True
def GetDefaultFilename(self):
return self._filename
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