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# -----------------------------------------------------------------
# pycparser: func_calls.py
#
# Using pycparser for printing out all the calls of some function
# in a C file.
#
# 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 visitor with some state information (the funcname it's looking for)
class FuncCallVisitor(c_ast.NodeVisitor):
def __init__(self, funcname: str) -> None:
self.funcname = funcname
def visit_FuncCall(self, node: c_ast.FuncCall) -> None:
if isinstance(node.name, c_ast.ID) and node.name.name == self.funcname:
print(f"{self.funcname} called at {node.name.coord}")
# Visit args in case they contain more func calls.
if node.args is not None:
self.visit(node.args)
def show_func_calls(filename: str, funcname: str) -> None:
ast = parse_file(filename, use_cpp=True)
v = FuncCallVisitor(funcname)
v.visit(ast)
if __name__ == "__main__":
if len(sys.argv) > 2:
filename = sys.argv[1]
func = sys.argv[2]
else:
filename = "examples/c_files/basic.c"
func = "foo"
show_func_calls(filename, func)
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