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+#!/usr/bin/env python
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+#
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+# generates an empty binary file
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+#
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+# This tool generates an empty binary file of the required size.
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+#
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+# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
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+#
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+# Licensed under the Apache License, Version 2.0 (the "License");
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+# you may not use this file except in compliance with the License.
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+# You may obtain a copy of the License at
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+#
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+# http:#www.apache.org/licenses/LICENSE-2.0
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+#
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+# Unless required by applicable law or agreed to in writing, software
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+# distributed under the License is distributed on an "AS IS" BASIS,
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+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+# See the License for the specific language governing permissions and
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+# limitations under the License.
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+from __future__ import print_function, division
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+import argparse
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+import os
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+import re
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+import struct
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+import sys
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+import hashlib
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+import binascii
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+
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+__version__ = '1.0'
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+
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+quiet = False
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+
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+def status(msg):
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+ """ Print status message to stderr """
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+ if not quiet:
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+ critical(msg)
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+
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+def critical(msg):
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+ """ Print critical message to stderr """
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+ if not quiet:
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+ sys.stderr.write(msg)
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+ sys.stderr.write('\n')
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+
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+def generate_blanked_file(size, output_path):
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+ output = ""
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+ for i in range(size):
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+ output += b"\xFF"
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+ try:
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+ stdout_binary = sys.stdout.buffer # Python 3
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+ except AttributeError:
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+ stdout_binary = sys.stdout
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+ with stdout_binary if output_path == '-' else open(output_path, 'wb') as f:
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+ f.write(output)
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+
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+def main():
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+ global quiet
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+ parser = argparse.ArgumentParser(description='Generates an empty binary file of the required size.')
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+
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+ parser.add_argument('--quiet', '-q', help="Don't print status messages to stderr", action='store_true')
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+
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+ parser.add_argument('--size', help='Size of generated the file', type=str, required=True)
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+
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+ parser.add_argument('output', help='Path for binary file.', nargs='?', default='-')
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+ args = parser.parse_args()
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+
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+ quiet = args.quiet
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+
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+ size = int(args.size, 0)
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+ if size > 0 :
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+ generate_blanked_file(size, args.output)
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+ return 0
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+
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+class InputError(RuntimeError):
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+ def __init__(self, e):
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+ super(InputError, self).__init__(e)
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+
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+if __name__ == '__main__':
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+ try:
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+ r = main()
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+ sys.exit(r)
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+ except InputError as e:
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+ print(e, file=sys.stderr)
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+ sys.exit(2)
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Angus Gratton