src/native_client/src/trusted/service_runtime/export_header.py

   1 #!/usr/bin/python
   2 # Copyright (c) 2008 The Native Client Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 """Tools for exporting Native Client ABI header files.
   7
   8 This module is used to export Native Client ABI header files -- which
   9 are in the native_client/src/trusted/service_runtime/include directory
  10 -- for use with the SDK and newlib to compile NaCl applications.
  11 """
  12
  13 import os
  14 import re
  15 import sys
  16
  17
  18 def ProcessStream(instr, outstr):
  19   """Read internal version of header file from instr, write exported
  20   version to outstr.  The transformations are:
  21   1) remove nacl_abi_ prefixes (in its various incarnations)
  22   2) change include directives from the Google coding style
  23      "native_client/include/foo/bar.h" to <foo/bar.h>, and from
  24      "native_client/src/trusted/service_runtime/include/baz/quux.h" to
  25      <baz/quux.h>.
  26   3) change include guards from
  27      "#ifdef NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_FOO_H" to
  28      "#ifdef EXPORT_SRC_TRUSTED_SERVICE_RUNTIME_FOO_H"
  29   """
  30
  31   abi = r'\b(?:nacl_abi_|NaClAbi|NACL_ABI_)([A-Za-z0-9_]*)'
  32   cabi = re.compile(abi)
  33
  34   inc = (r'^#\s*include\s+"native_client(?:/src/trusted/service_runtime)?'+
  35          r'/include/([^"]*)"')
  36   cinc = re.compile(inc)
  37
  38   inc_guard = r'^#\s*(ifndef|define)\s+_?NATIVE_CLIENT[A-Z_]+_H'
  39   cinc_guard = re.compile(inc_guard)
  40   include_guard_found = False
  41
  42   for line in instr:
  43     if cinc.search(line):
  44       print >>outstr, cinc.sub(r'#include <\1>', line)
  45     elif cinc_guard.match(line):
  46       include_guard_found = True
  47       print >>outstr, re.sub('NATIVE_CLIENT', 'EXPORT', line),
  48     else:
  49       print >>outstr, cabi.sub(r'\1', line),
  50
  51   if not include_guard_found:
  52     print >>sys.stderr, 'No include guard found in', instr.name
  53     sys.exit(1)
  54
  55
  56 def ProcessDir(srcdir, dstdir):
  57   if not os.path.isdir(srcdir):
  58     return
  59   # endif
  60   if not os.path.isdir(dstdir):
  61     os.makedirs(dstdir)
  62   # endif
  63   for fn in os.listdir(srcdir):
  64     srcpath = os.path.join(srcdir, fn)
  65     dstpath = os.path.join(dstdir, fn)
  66     if os.path.isfile(srcpath) and fn.endswith('.h'):
  67       ProcessStream(open(srcpath),
  68                     open(dstpath, 'w'))
  69     elif os.path.isdir(srcpath):
  70       ProcessDir(srcpath, dstpath)
  71     # endif
  72   # endfor
  73 # enddef
  74
  75 def main(argv):
  76   if len(argv) != 3:
  77     print >>sys.stderr, ('Usage: ./export_header source/include/path'
  78                          ' dest/include/path')
  79     return 1
  80   # endif
  81   ProcessDir(argv[1], argv[2])
  82   return 0
  83 # enddef
  84
  85 if __name__ == '__main__':
  86   sys.exit(main(sys.argv))
  87 # endif