src/compiler/glsl/xxd.py

   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
  25 from __future__ import unicode_literals
  26 import argparse
  27 import io
  28 import string
  29 import sys
  30
  31
  32 def get_args():
  33     parser = argparse.ArgumentParser()
  34     parser.add_argument('input', help="Name of input file")
  35     parser.add_argument('output', help="Name of output file")
  36     parser.add_argument("-n", "--name",
  37                         help="Name of C variable")
  38     args = parser.parse_args()
  39     return args
  40
  41
  42 def 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
  49 def emit_byte(f, b):
  50     if ord(b) == ord('\n'):
  51         f.write(b"\\n\"\n    \"")
  52         return
  53     elif ord(b) == ord('\r'):
  54         f.write(b"\\r\"\n    \"")
  55         return
  56     elif ord(b) == ord('\t'):
  57         f.write(b"\\t")
  58         return
  59     elif ord(b) == ord('"'):
  60         f.write(b"\\\"")
  61         return
  62     elif ord(b) == ord('\\'):
  63         f.write(b"\\\\")
  64         return
  65
  66     if ord(b) >= ord(' ') and ord(b) <= ord('~'):
  67         f.write(b)
  68     else:
  69         hi = ord(b) >> 4
  70         lo = ord(b) & 0x0f
  71         f.write("\\x{:x}{:x}".format(hi, lo).encode('utf-8'))
  72
  73
  74 def process_file(args):
  75     with io.open(args.input, "rb") as infile:
  76         try:
  77             with io.open(args.output, "wb") as outfile:
  78                 # If a name was not specified on the command line, pick one based on the
  79                 # name of the input file.  If no input filename was specified, use
  80                 # from_stdin.
  81                 if args.name is not None:
  82                     name = args.name
  83                 else:
  84                     name = filename_to_C_identifier(args.input)
  85
  86                 outfile.write("static const char {}[] =\n \"".format(name).encode('utf-8'))
  87
  88                 while True:
  89                     byte = infile.read(1)
  90                     if byte == b"":
  91                         break
  92
  93                     emit_byte(outfile, byte)
  94
  95                 outfile.write(b"\"\n    ;\n")
  96         except Exception:
  97             # In the event that anything goes wrong, delete the output file,
  98             # then re-raise the exception. Deleteing the output file should
  99             # ensure that the build system doesn't try to use the stale,
 100             # half-generated file.
 101             os.unlink(args.output)
 102             raise
 103
 104
 105 def main():
 106     args = get_args()
 107     process_file(args)
 108
 109
 110 if __name__ == "__main__":
 111     main()