1#-----------------------------------------------------------------
2# pycparser: func_defs.py
3#
4# Using pycparser for printing out all the functions defined in a
5# C file.
6#
7# This is a simple example of traversing the AST generated by
8# pycparser. Call it from the root directory of pycparser.
9#
10# Eli Bendersky [https://eli.thegreenplace.net/]
11# License: BSD
12#-----------------------------------------------------------------
13from __future__ import print_function
14import sys
15
16# This is not required if you've installed pycparser into
17# your site-packages/ with setup.py
18sys.path.extend(['.', '..'])
19
20from pycparser import c_parser, c_ast, parse_file
21
22
23# A simple visitor for FuncDef nodes that prints the names and
24# locations of function definitions.
25class FuncDefVisitor(c_ast.NodeVisitor):
26    def visit_FuncDef(self, node):
27        print('%s at %s' % (node.decl.name, node.decl.coord))
28
29
30def show_func_defs(filename):
31    # Note that cpp is used. Provide a path to your own cpp or
32    # make sure one exists in PATH.
33    ast = parse_file(filename, use_cpp=True,
34                     cpp_args=r'-Iutils/fake_libc_include')
35
36    v = FuncDefVisitor()
37    v.visit(ast)
38
39
40if __name__ == "__main__":
41    if len(sys.argv) > 1:
42        filename  = sys.argv[1]
43    else:
44        filename = 'examples/c_files/memmgr.c'
45
46    show_func_defs(filename)
47