Beispiel #1
0
 def unpack_format_from_file(self, f, seek=None):
     if seek is not None:
         timepro.start("seek")
         f.seek(seek)
         timepro.end("seek")
     buf = f.read(self.size)
     d = self.unpack_format(buf)
     return d
Beispiel #2
0
 def unpack_format_from_file(self, f, seek=None):
     if seek is not None:
         timepro.start("seek")
         f.seek(seek)
         timepro.end("seek")
     buf = f.read(self.size)
     d = self.unpack_format(buf)
     return d
Beispiel #3
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 def read_directory_entry(self, offset):
     """May return either a Redirect or Article entry depending on flag"""
     timepro.start("seek")
     self.f.seek(offset)
     timepro.end("seek")
     timepro.start("read(2)")
     buf = self.f.read(2)
     timepro.end("read(2)")
     fields = struct.unpack('H', buf)
     if fields[0] == 0xffff:  # Then redirect
         return dict(self.redirectEntryFormat.unpack_from_file(self.f, offset))
     else:
         return dict(self.articleEntryFormat.unpack_from_file(self.f, offset))
Beispiel #4
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 def read_directory_entry(self, offset):
     """May return either a Redirect or Article entry depending on flag"""
     timepro.start("seek")
     self.f.seek(offset)
     timepro.end("seek")
     timepro.start("read(2)")
     buf = self.f.read(2)
     timepro.end("read(2)")
     fields = struct.unpack('H', buf)
     if fields[0] == 0xffff:  # Then redirect
         return dict(
             self.redirectEntryFormat.unpack_from_file(self.f, offset))
     else:
         return dict(
             self.articleEntryFormat.unpack_from_file(self.f, offset))
Beispiel #5
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    def _decompress(self, chunk_size=32000):
        """Decompresses the cluster if compression flag was found. Stores
        uncompressed results internally."""

        if not self.compressed:
            return

        self.file_buf.seek(self.ptr + 1)

        # Store uncompressed cluster data for use as uncompressed data
        self.uncomp_buf = StringIO()

        decomp = lzma.LZMADecompressor()
        while not decomp.eof:
            timepro.start("file_buf read")
            comp_data = self.file_buf.read(chunk_size)
            timepro.end("file_buf read")

            timepro.start("decompress")
            uncomp_data = decomp.decompress(comp_data)
            timepro.end("decompress")

            timepro.start("write")
            self.uncomp_buf.write(uncomp_data)
            timepro.end("write")

        return self.uncomp_buf
Beispiel #6
0
    def _decompress(self, chunk_size=32000):
        """Decompresses the cluster if compression flag was found. Stores
        uncompressed results internally."""

        if not self.compressed:
            return

        self.file_buf.seek(self.ptr + 1)

        # Store uncompressed cluster data for use as uncompressed data
        self.uncomp_buf = StringIO()

        decomp = lzma.LZMADecompressor()
        while not decomp.eof:
            timepro.start("file_buf read")
            comp_data = self.file_buf.read(chunk_size)
            timepro.end("file_buf read")

            timepro.start("decompress")
            uncomp_data = decomp.decompress(comp_data)
            timepro.end("decompress")

            timepro.start("write")
            self.uncomp_buf.write(uncomp_data)
            timepro.end("write")

        return self.uncomp_buf