| # 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 |