Source code for objutils.emon52

#!/usr/bin/env python

__version__ = "0.1.0"

__copyright__ = """
    objutils - Object file library for Python.

   (C) 2010-2019 by Christoph Schueler <cpu12.gems@googlemail.com>

   All Rights Reserved

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""

import objutils.hexfile as hexfile


DATA = 0
EOF = 1
EXTENDED_SEGMENT_ADDRESS = 2
START_SEGMENT_ADDRESS = 3
EXTENDED_LINEAR_ADDRESS = 4
START_LINEAR_ADDRESS = 5




[docs]
class Codec:
    """ """

    def __init__(self, file_like):
        self.file_like = file_like



[docs]
    def readlines(self):
        yield from self.file_like.readlines()





[docs]
    def writelines(self, lines):
        for line in lines:
            self.file_like.write(line)








[docs]
class Reader(hexfile.Reader):
    """ """

    FORMAT_SPEC = ((hexfile.TYPE_FROM_RECORD, "LL AAAA:DD CCCC"),)
    DATA_SEPARATOR = " "



[docs]
    def check_line(self, line, format_type):
        if line.length != len(line.chunk):
            raise hexfile.InvalidRecordLengthError("Byte count doesn't match length of actual data.")
        # todo: factor out checksum calculation from line!!!
        checksum = sum(line.chunk) & 0xFFFF
        if line.checksum != checksum:
            raise hexfile.InvalidRecordChecksumError()





[docs]
    def is_data_line(self, line, format_type):
        return True








[docs]
class Writer(hexfile.Writer):
    """ """

    MAX_ADDRESS_BITS = 16



[docs]
    def compose_row(self, address, length, row):
        checksum = sum(row) % 65536
        return f"{length:02X} {address:04X}:{Writer.hex_bytes(row, spaced=True)!s} {checksum:04X}"