xxd.py - mozsearch

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# encoding=utf-8

# Copyright © 2018 Intel Corporation

# Permission is hereby granted, free of charge, to any person obtaining a

# copy of this software and associated documentation files (the "Software"),

# to deal in the Software without restriction, including without limitation

# the rights to use, copy, modify, merge, publish, distribute, sublicense,

# and/or sell copies of the Software, and to permit persons to whom the

# Software is furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice (including the next

# paragraph) shall be included in all copies or substantial portions of the

# Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

# IN THE SOFTWARE.

# Converts a file to a C/C++ #include containing a string

from __future__ import unicode_literals

import argparse

import io

import string

import sys

def get_args():

    parser = argparse.ArgumentParser()

    parser.add_argument('input', help="Name of input file")

    parser.add_argument('output', help="Name of output file")

    parser.add_argument("-n", "--name",

                        help="Name of C variable")

    args = parser.parse_args()

    return args

def filename_to_C_identifier(n):

    if n[0] != '_' and not n[0].isalpha():

        n = "_" + n[1:]

    return "".join([c if c.isalnum() or c == "_" else "_" for c in n])

def emit_byte(f, b):

    if ord(b) == ord('\n'):

        f.write(b"\\n\"\n    \"")

        return

    elif ord(b) == ord('\r'):

        f.write(b"\\r\"\n    \"")

        return

    elif ord(b) == ord('\t'):

        f.write(b"\\t")

        return

    elif ord(b) == ord('"'):

        f.write(b"\\\"")

        return

    elif ord(b) == ord('\\'):

        f.write(b"\\\\")

        return

    if ord(b) >= ord(' ') and ord(b) <= ord('~'):

        f.write(b)

    else:

        hi = ord(b) >> 4

        lo = ord(b) & 0x0f

        f.write("\\x{:x}{:x}".format(hi, lo).encode('utf-8'))

def process_file(args):

    with io.open(args.input, "rb") as infile:

        try:

            with io.open(args.output, "wb") as outfile:

                # If a name was not specified on the command line, pick one based on the

                # name of the input file.  If no input filename was specified, use

                # from_stdin.

                if args.name is not None:

                    name = args.name

                else:

                    name = filename_to_C_identifier(args.input)

                outfile.write("static const char {}[] =\n \"".format(name).encode('utf-8'))

                while True:

                    byte = infile.read(1)

                    if byte == b"":

                        break

                    emit_byte(outfile, byte)

                outfile.write(b"\"\n    ;\n")

        except Exception:

            # In the event that anything goes wrong, delete the output file,

            # then re-raise the exception. Deleteing the output file should

            # ensure that the build system doesn't try to use the stale,

            # half-generated file.

            os.unlink(args.output)

            raise

def main():

    args = get_args()

    process_file(args)

if __name__ == "__main__":

    main()