1# encoding=utf-8
2# Copyright © 2018 Intel Corporation
3#
4# Permission is hereby granted, free of charge, to any person obtaining a
5# copy of this software and associated documentation files (the "Software"),
6# to deal in the Software without restriction, including without limitation
7# the rights to use, copy, modify, merge, publish, distribute, sublicense,
8# and/or sell copies of the Software, and to permit persons to whom the
9# Software is furnished to do so, subject to the following conditions:
10#
11# The above copyright notice and this permission notice (including the next
12# paragraph) shall be included in all copies or substantial portions of the
13# Software.
14#
15# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21# IN THE SOFTWARE.
22
23# Converts a file to a C/C++ #include containing a string
24
25import argparse
26import io
27import os
28
29
30def get_args():
31    parser = argparse.ArgumentParser()
32    parser.add_argument('input', help="Name of input file")
33    parser.add_argument('output', help="Name of output file")
34    parser.add_argument("-n", "--name",
35                        help="Name of C variable")
36    parser.add_argument("-b", "--binary", dest='binary', action='store_const',
37                        const=True, default=False)
38    args = parser.parse_args()
39    return args
40
41
42def filename_to_C_identifier(n):
43    if n[0] != '_' and not n[0].isalpha():
44        n = "_" + n[1:]
45
46    return "".join([c if c.isalnum() or c == "_" else "_" for c in n])
47
48
49def emit_byte(f, b):
50    f.write("0x{:02x}, ".format(ord(b)).encode('utf-8'))
51
52
53def process_file(args):
54    with io.open(args.input, "rb") as infile:
55        try:
56            with io.open(args.output, "wb") as outfile:
57                # If a name was not specified on the command line, pick one based on the
58                # name of the input file.  If no input filename was specified, use
59                # from_stdin.
60                if args.name is not None:
61                    name = args.name
62                else:
63                    name = filename_to_C_identifier(args.input)
64
65                outfile.write("static const char {}[] = {{\n".format(name).encode('utf-8'))
66
67                linecount = 0
68                while True:
69                    byte = infile.read(1)
70                    if byte == b"":
71                        break
72
73                    if not args.binary:
74                        assert(ord(byte) != 0)
75
76                    emit_byte(outfile, byte)
77                    linecount = linecount + 1
78                    if linecount > 20:
79                        outfile.write(b"\n ")
80                        linecount = 0
81                if not args.binary:
82                    outfile.write(b"\n0")
83                outfile.write(b"\n};\n\n")
84        except Exception:
85            # In the event that anything goes wrong, delete the output file,
86            # then re-raise the exception. Deleteing the output file should
87            # ensure that the build system doesn't try to use the stale,
88            # half-generated file.
89            os.unlink(args.output)
90            raise
91
92
93def main():
94    args = get_args()
95    process_file(args)
96
97
98if __name__ == "__main__":
99    main()
100