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