cpython/Objects/typeslots.py

#!/usr/bin/python
# Usage: typeslots.py < Include/typeslots.h typeslots.inc

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 = "ht_type."+member
        elif member.startswith("am_"):
            member = "as_async."+member
        elif member.startswith("nb_"):
            member = "as_number."+member
        elif member.startswith("mp_"):
            member = "as_mapping."+member
        elif member.startswith("sq_"):
            member = "as_sequence."+member
        elif member.startswith("bf_"):
            member = "as_buffer."+member
        res[int(m.group(2))] = member

    M = max(res.keys())+1
    for i in range(1,M):
        if i in res:
            out.write("offsetof(PyHeapTypeObject, %s),\n" % res[i])
        else:
            out.write("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()