scripts/modules/module_block.py

   1 #!/usr/bin/python
   2 #
   3 # Module information generator
   4 #
   5 # Copyright Red Hat, Inc. 2015 - 2016
   6 #
   7 # Authors:
   8 #  Marc Mari <markmb@redhat.com>
   9 #
  10 # This work is licensed under the terms of the GNU GPL, version 2.
  11 # See the COPYING file in the top-level directory.
  12
  13 from __future__ import print_function
  14 import sys
  15 import os
  16
  17 def get_string_struct(line):
  18     data = line.split()
  19
  20     # data[0] -> struct element name
  21     # data[1] -> =
  22     # data[2] -> value
  23
  24     return data[2].replace('"', '')[:-1]
  25
  26 def add_module(fheader, library, format_name, protocol_name):
  27     lines = []
  28     lines.append('.library_name = "' + library + '",')
  29     if format_name != "":
  30         lines.append('.format_name = "' + format_name + '",')
  31     if protocol_name != "":
  32         lines.append('.protocol_name = "' + protocol_name + '",')
  33
  34     text = '\n        '.join(lines)
  35     fheader.write('\n    {\n        ' + text + '\n    },')
  36
  37 def process_file(fheader, filename):
  38     # This parser assumes the coding style rules are being followed
  39     with open(filename, "r") as cfile:
  40         found_start = False
  41         library, _ = os.path.splitext(os.path.basename(filename))
  42         for line in cfile:
  43             if found_start:
  44                 line = line.replace('\n', '')
  45                 if line.find(".format_name") != -1:
  46                     format_name = get_string_struct(line)
  47                 elif line.find(".protocol_name") != -1:
  48                     protocol_name = get_string_struct(line)
  49                 elif line == "};":
  50                     add_module(fheader, library, format_name, protocol_name)
  51                     found_start = False
  52             elif line.find("static BlockDriver") != -1:
  53                 found_start = True
  54                 format_name = ""
  55                 protocol_name = ""
  56
  57 def print_top(fheader):
  58     fheader.write('''/* AUTOMATICALLY GENERATED, DO NOT MODIFY */
  59 /*
  60  * QEMU Block Module Infrastructure
  61  *
  62  * Authors:
  63  *  Marc Mari       <markmb@redhat.com>
  64  */
  65
  66 ''')
  67
  68     fheader.write('''#ifndef QEMU_MODULE_BLOCK_H
  69 #define QEMU_MODULE_BLOCK_H
  70
  71 static const struct {
  72     const char *format_name;
  73     const char *protocol_name;
  74     const char *library_name;
  75 } block_driver_modules[] = {''')
  76
  77 def print_bottom(fheader):
  78     fheader.write('''
  79 };
  80
  81 #endif
  82 ''')
  83
  84 # First argument: output file
  85 # All other arguments: modules source files (.c)
  86 output_file = sys.argv[1]
  87 with open(output_file, 'w') as fheader:
  88     print_top(fheader)
  89
  90     for filename in sys.argv[2:]:
  91         if os.path.isfile(filename):
  92             process_file(fheader, filename)
  93         else:
  94             print("File " + filename + " does not exist.", file=sys.stderr)
  95             sys.exit(1)
  96
  97     print_bottom(fheader)
  98
  99 sys.exit(0)