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# -----------------------------------------------------------------
# pycparser: func_defs.py
#
# Using pycparser for printing out all the functions defined in a
# C file.
#
# This is a simple example of traversing the AST generated by
# pycparser. Call it from the root directory of pycparser.
#
# Eli Bendersky [https://eli.thegreenplace.net/]
# License: BSD
# -----------------------------------------------------------------
import sys
# This is not required if you've installed pycparser into
# your site-packages/ with setup.py
sys.path.extend([".", ".."])
from pycparser import c_ast, parse_file
# A simple visitor for FuncDef nodes that prints the names and
# locations of function definitions.
class FuncDefVisitor(c_ast.NodeVisitor):
def visit_FuncDef(self, node: c_ast.FuncDef) -> None:
print(f"{node.decl.name} at {node.decl.coord}")
def show_func_defs(filename: str) -> None:
# Note that cpp is used. Provide a path to your own cpp or
# make sure one exists in PATH.
ast = parse_file(filename, use_cpp=True, cpp_args=r"-Iutils/fake_libc_include")
v = FuncDefVisitor()
v.visit(ast)
if __name__ == "__main__":
if len(sys.argv) > 1:
filename = sys.argv[1]
else:
filename = "examples/c_files/memmgr.c"
show_func_defs(filename)
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