mirror of
https://github.com/immortalwrt/immortalwrt.git
synced 2025-10-30 07:49:55 +08:00
6f692c9c49
clean up formatting with black using 80 character line limit Signed-off-by: Doug Kerr <dek3rr@gmail.com>
140 lines
2.6 KiB
Python
Executable File
140 lines
2.6 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
"""
|
|
CFE Partition Tag
|
|
|
|
{
|
|
u32 part_id;
|
|
u32 part_size;
|
|
u16 flags;
|
|
char part_name[33];
|
|
char part_version[21];
|
|
u32 part_crc32;
|
|
}
|
|
|
|
"""
|
|
|
|
import argparse
|
|
import os
|
|
import struct
|
|
import binascii
|
|
|
|
|
|
PART_NAME_SIZE = 33
|
|
PART_VERSION_SIZE = 21
|
|
|
|
|
|
def auto_int(x):
|
|
return int(x, 0)
|
|
|
|
|
|
def str_to_bytes_pad(string, size):
|
|
str_bytes = string.encode()
|
|
num_bytes = len(str_bytes)
|
|
if num_bytes >= size:
|
|
str_bytes = str_bytes[: size - 1] + "\0".encode()
|
|
else:
|
|
str_bytes += "\0".encode() * (size - num_bytes)
|
|
return str_bytes
|
|
|
|
|
|
def create_tag(args, in_bytes, size):
|
|
# JAM CRC32 is bitwise not and unsigned
|
|
crc = ~binascii.crc32(in_bytes) & 0xFFFFFFFF
|
|
|
|
tag = bytearray()
|
|
tag += struct.pack(">I", args.part_id)
|
|
tag += struct.pack(">I", size)
|
|
tag += struct.pack(">H", args.part_flags)
|
|
tag += str_to_bytes_pad(args.part_name, PART_NAME_SIZE)
|
|
tag += str_to_bytes_pad(args.part_version, PART_VERSION_SIZE)
|
|
tag += struct.pack(">I", crc)
|
|
|
|
return tag
|
|
|
|
|
|
def create_output(args):
|
|
in_st = os.stat(args.input_file)
|
|
in_size = in_st.st_size
|
|
|
|
in_f = open(args.input_file, "r+b")
|
|
in_bytes = in_f.read(in_size)
|
|
in_f.close()
|
|
|
|
tag = create_tag(args, in_bytes, in_size)
|
|
|
|
out_f = open(args.output_file, "w+b")
|
|
out_f.write(tag)
|
|
out_f.close()
|
|
|
|
|
|
def main():
|
|
global args
|
|
|
|
parser = argparse.ArgumentParser(description="")
|
|
|
|
parser.add_argument(
|
|
"--flags",
|
|
dest="part_flags",
|
|
action="store",
|
|
type=auto_int,
|
|
help="Partition Flags",
|
|
)
|
|
|
|
parser.add_argument(
|
|
"--id",
|
|
dest="part_id",
|
|
action="store",
|
|
type=auto_int,
|
|
help="Partition ID",
|
|
)
|
|
|
|
parser.add_argument(
|
|
"--input-file",
|
|
dest="input_file",
|
|
action="store",
|
|
type=str,
|
|
help="Input file",
|
|
)
|
|
|
|
parser.add_argument(
|
|
"--output-file",
|
|
dest="output_file",
|
|
action="store",
|
|
type=str,
|
|
help="Output file",
|
|
)
|
|
|
|
parser.add_argument(
|
|
"--name",
|
|
dest="part_name",
|
|
action="store",
|
|
type=str,
|
|
help="Partition Name",
|
|
)
|
|
|
|
parser.add_argument(
|
|
"--version",
|
|
dest="part_version",
|
|
action="store",
|
|
type=str,
|
|
help="Partition Version",
|
|
)
|
|
|
|
args = parser.parse_args()
|
|
|
|
if (
|
|
(not args.part_flags)
|
|
or (not args.part_id)
|
|
or (not args.input_file)
|
|
or (not args.output_file)
|
|
or (not args.part_name)
|
|
or (not args.part_version)
|
|
):
|
|
parser.print_help()
|
|
else:
|
|
create_output(args)
|
|
|
|
|
|
main()
|