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#-----------------------------------------------------------------
# pycparser: __init__.py
#
# This package file exports some convenience functions for
# interacting with pycparser
#
# Copyright (C) 2008-2010, Eli Bendersky
# License: LGPL
#-----------------------------------------------------------------
__all__ = ['c_lexer', 'c_parser', 'c_ast']
__version__ = '2.01'
from subprocess import Popen, PIPE
from .c_parser import CParser
def parse_file( filename, use_cpp=False,
cpp_path='cpp', cpp_args=''):
""" Parse a C file using pycparser.
filename:
Name of the file you want to parse.
use_cpp:
Set to True if you want to execute the C pre-processor
on the file prior to parsing it.
cpp_path:
If use_cpp is True, this is the path to 'cpp' on your
system. If no path is provided, it attempts to just
execute 'cpp', so it must be in your PATH.
cpp_args:
If use_cpp is True, set this to the command line
arguments strings to cpp. Be careful with quotes -
it's best to pass a raw string (r'') here.
For example:
r'-I../utils/fake_libc_include'
If several arguments are required, pass a list of
strings.
When successful, an AST is returned. ParseError can be
thrown if the file doesn't parse successfully.
Errors from cpp will be printed out.
"""
if use_cpp:
path_list = [cpp_path]
if isinstance(cpp_args, list):
path_list += cpp_args
elif cpp_args != '':
path_list += [cpp_args]
path_list += [filename]
# Note the use of universal_newlines to treat all newlines
# as \n for Python's purpose
#
pipe = Popen( path_list,
stdout=PIPE,
universal_newlines=True)
text = pipe.communicate()[0]
else:
text = open(filename, 'rU').read()
parser = CParser()
return parser.parse(text, filename)
if __name__ == "__main__":
pass
|
