7 autogenerated_notice = """/*
8 * This file is autogenerated by bin2array.py
12 def make_sublist_group (lst: list, grp: int) -> list:
14 Group list elements into sublists.
15 make_sublist_group([1, 2, 3, 4, 5, 6, 7], 3) = [[1, 2, 3], [4, 5, 6], 7]
17 return [lst[i:i+grp] for i in range(0, len(lst), grp)]
19 def generate_c_array_data (bindata: bytes,
25 element_separator: str) -> str:
27 Generate the contents of a C array as a hex string
29 0x10, 0x20, 0x30, 0x40,
30 0x50, 0x60, 0x70, 0x80,
32 hexstr = binascii.hexlify(bindata).decode("UTF-8")
34 for i in range(0, len(hexstr), 2 * element_size):
35 array += [element_prefix + hexstr[i:i + 2 * element_size] + element_suffix]
38 array = make_sublist_group(array, newline_after)
42 return newline_value.join([element_separator.join(e) + element_separator for e in array])
44 def decorate_c_array_data (hexdata: str,
49 Place @hexdata into a valid C array named @var_name of C type @var_type.
51 ret = var_type + " " + var_name + "[] = {" + newline_value
52 ret += hexdata + newline_value
53 ret += "};" + newline_value
57 parser = argparse.ArgumentParser(description='Convert binary file to C-style array initializer.')
58 parser.add_argument("-i", "--input", help="the file to be converted")
59 parser.add_argument("--output", help="c source file location")
60 parser.add_argument("--header-output", help="c header file location")
61 parser.add_argument("--linebreak", type=int, help="add linebreak after every N element")
62 parser.add_argument("--linebreak-value", default="\n", help="use what sequence to break lines, defaults to \"\\n\"")
63 parser.add_argument("--separator", default=", ", help="use what to separate elements, defaults to \", \"")
64 parser.add_argument("--array-name", default="array_data", help="name of the resulting array")
65 parser.add_argument("--element-type", default="char", help="C type for the array")
66 parser.add_argument("--element-size", type=int, default=1, help="how many bytes per element")
67 parser.add_argument("--element-prefix", default="0x", help="string to be added to the head of element, defaults to \"0x\"")
68 parser.add_argument("--element-suffix", default="", help="string to be added to the tail of element, defaults to none")
69 parser.add_argument("--c-include", help="header to include")
70 args = parser.parse_args(args)
72 with open(args.input, 'rb') as f:
73 file_content = f.read()
75 # don't deal with unaligned content
76 assert len(file_content) % args.element_size == 0
78 # get a relative path from the source file to the header to use in an #include
79 source_to_header = os.path.relpath (os.path.dirname (args.header_output),
80 os.path.dirname (args.output))
82 ret = autogenerated_notice
84 ret += os.path.join (source_to_header,
85 os.path.basename (args.header_output))
86 ret += "\"" + args.linebreak_value
88 arr_data = generate_c_array_data (file_content,
95 ret += decorate_c_array_data (arr_data,
100 with open (args.output, 'w') as f:
103 # write companion header
104 with open(args.header_output, 'w') as f:
105 f.write (autogenerated_notice)
107 f.write ("#include <" + args.c_include + ">" + args.linebreak_value)
108 f.write ("extern " + args.element_type + " " + args.array_name + "[];" + args.linebreak_value)
109 f.write ("#define " + args.array_name + "_size " + str(len(file_content) // args.element_size))
111 if __name__ == "__main__":
112 sys.exit(main(sys.argv[1:]))