circuitpython/py/make_root_pointers.py

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"""
This pre-processor parses a single file containing a list of
MP_REGISTER_ROOT_POINTER(variable declaration) items.
These are used to generate a header with the required entries for
"struct _mp_state_vm_t" in py/mpstate.h
"""
from __future__ import print_function
import argparse
import io
import re
PATTERN = re.compile(r"MP_REGISTER_ROOT_POINTER\((.*?)\);")
def find_root_pointer_registrations(filename):
"""Find any MP_REGISTER_ROOT_POINTER definitions in the provided file.
:param str filename: path to file to check
:return: List[variable_declaration]
"""
with io.open(filename, encoding="utf-8") as c_file_obj:
return set(re.findall(PATTERN, c_file_obj.read()))
def generate_root_pointer_header(root_pointers):
"""Generate header with root pointer entries.
:param List[variable_declaration] root_pointers: root pointer declarations
:return: None
"""
# Print header file for all external modules.
print("// Automatically generated by make_root_pointers.py.")
print()
for item in root_pointers:
print(item, end=";")
print()
def main():
parser = argparse.ArgumentParser()
parser.add_argument("file", nargs=1, help="file with MP_REGISTER_ROOT_POINTER definitions")
args = parser.parse_args()
root_pointers = find_root_pointer_registrations(args.file[0])
generate_root_pointer_header(sorted(root_pointers))
if __name__ == "__main__":
main()