cpython/Objects/typeslots.py

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#!/usr/bin/python
# Usage: typeslots.py < Include/typeslots.h typeslots.inc
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import sys, re
def generate_typeslots(out=sys.stdout):
out.write("/* Generated by typeslots.py */\n")
res = {}
for line in sys.stdin:
m = re.match("#define Py_([a-z_]+) ([0-9]+)", line)
if not m:
continue
member = m.group(1)
if member.startswith("tp_"):
member = f'{{-1, offsetof(PyTypeObject, {member})}}'
elif member.startswith("am_"):
member = (f'{{offsetof(PyAsyncMethods, {member}),'+
' offsetof(PyTypeObject, tp_as_async)}')
elif member.startswith("nb_"):
member = (f'{{offsetof(PyNumberMethods, {member}),'+
' offsetof(PyTypeObject, tp_as_number)}')
elif member.startswith("mp_"):
member = (f'{{offsetof(PyMappingMethods, {member}),'+
' offsetof(PyTypeObject, tp_as_mapping)}')
elif member.startswith("sq_"):
member = (f'{{offsetof(PySequenceMethods, {member}),'+
' offsetof(PyTypeObject, tp_as_sequence)}')
elif member.startswith("bf_"):
member = (f'{{offsetof(PyBufferProcs, {member}),'+
' offsetof(PyTypeObject, tp_as_buffer)}')
res[int(m.group(2))] = member
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M = max(res.keys())+1
for i in range(1,M):
if i in res:
out.write("%s,\n" % res[i])
else:
out.write("{0, 0},\n")
def main():
if len(sys.argv) == 2:
with open(sys.argv[1], "w") as f:
generate_typeslots(f)
else:
generate_typeslots()
if __name__ == "__main__":
main()