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109 lines
2.6 KiB
Python
Executable File
109 lines
2.6 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) Meta Platforms, Inc. and affiliates.
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# SPDX-License-Identifier: GPL-3.0-or-later
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import argparse
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import keyword
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from pathlib import Path
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import re
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ENUMS = {
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"elf": (
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"ET",
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"PT",
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"SHN",
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"SHT",
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"STB",
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"STT",
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"STV",
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),
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"dwarf": (
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"DW_AT",
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"DW_ATE",
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"DW_CHILDREN",
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"DW_END",
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"DW_FORM",
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"DW_LANG",
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"DW_LNE",
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"DW_LNS",
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"DW_OP",
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"DW_TAG",
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),
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}
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VALUE_REGEX = r"(?P<value>0x[0-9a-fA-F]+|[0-9]+)"
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REGEXES = {
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"elf": r"^\s*#\s*define\s+(?P<enum>"
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+ "|".join(ENUMS["elf"])
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+ r")_(?P<name>\w+)\s+"
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+ VALUE_REGEX,
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"dwarf": r"^\s*(?P<enum>"
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+ "|".join(ENUMS["dwarf"])
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+ r")_(?P<name>\w+)\s*=\s*"
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+ VALUE_REGEX,
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}
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def read_header(name: str) -> str:
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contents = (Path("libdrgn/include") / name).read_text()
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contents = re.sub(r"/\*.*?\*/", "", contents, flags=re.DOTALL)
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contents = re.sub(r"\\\n", "", contents)
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return contents
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def generate_constants(file: str) -> None:
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contents = read_header(file + ".h")
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enums = {}
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for match in re.finditer(REGEXES[file], contents, re.MULTILINE):
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enum = match.group("enum")
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name = match.group("name")
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value = int(match.group("value"), 0)
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try:
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enums[enum].append((name, value))
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except KeyError:
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enums[enum] = [(name, value)]
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print(
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f"""\
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# Automatically generated from {file}.h
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import enum
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from typing import Text
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"""
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)
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first = True
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for enum in ENUMS[file]:
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assert enums[enum]
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if not first:
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print()
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print()
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first = False
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print(f"class {enum}(enum.IntEnum):")
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for name, value in enums[enum]:
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if keyword.iskeyword(name):
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name += "_"
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print(f" {name} = 0x{value:X}", end="")
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if name == "name":
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print(" # type: ignore")
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else:
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print()
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print()
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print(" @classmethod")
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print(" def str(cls, value: int) -> Text:")
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print(" try:")
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print(f' return f"{enum}_{{cls(value).name}}"')
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print(" except ValueError:")
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print(" return hex(value)")
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(
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description="generate constants for Python tests from header file"
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)
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parser.add_argument("file", choices=list(ENUMS))
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args = parser.parse_args()
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generate_constants(args.file)
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