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- #!/usr/bin/env python3
- # Copyright 2021 The Chromium Authors. All rights reserved.
- # Use of this source code is governed by a BSD-style license that can be
- # found in the LICENSE file.
- """Helper for converting Windows HRESULT defines to enums.xml entries.
- It only works with HRESULTs defined using `_HRESULT_TYPEDEF_`, e.g.
- #define MF_E_SAMPLE_NOT_WRITABLE _HRESULT_TYPEDEF_(0xC00D36E0L)
- will be converted to
- <int value="-1072875808" label="MF_E_SAMPLE_NOT_WRITABLE"/>
- Some Windows files may use different or no macros to define HRESULTs, e.g.
- #define DRM_E_FILEOPEN ((DRM_RESULT)0x8003006EL)
- #define MF_INDEX_SIZE_ERR 0x80700001
- This script will not work in those cases, but is easy to be modified to work.
- Usage:
- tools/hresult_to_enum.py -i mferror.h -o mferror.xml
- """
- import argparse
- import re
- import sys
- _HRESULT_RE = re.compile(
- r'^#define\s+([0-9A-Z_]+)\s+.*_HRESULT_TYPEDEF_\((0x[0-9A-F]{8}).*')
- def _HexToSignedInt(hex_str):
- """Converts a hex string to a signed integer string.
- Args:
- hex_str: A string representing a hex number.
- Returns:
- A string representing the converted signed integer.
- """
- int_val = int(hex_str, 16)
- if int_val & (1 << 31):
- int_val -= 1 << 32
- return str(int_val)
- def _HresultToEnum(match):
- """Converts an HRESULT define to an enums.xml entry.
- """
- hresult = match.group(1)
- hex_str = match.group(2)
- int_str = _HexToSignedInt(hex_str)
- return f'<int value="{int_str}" label="{hresult}"/>'
- def _ConvertAllHresultDefines(source):
- """Converts all HRESULT defines to enums.xml entries.
- """
- in_lines = source.splitlines()
- out_lines = []
- for in_line in in_lines:
- out_line, num_of_subs = _HRESULT_RE.subn(_HresultToEnum, in_line)
- assert num_of_subs <= 1
- if num_of_subs == 1:
- out_lines.append(out_line)
- return '\n'.join(out_lines)
- def main():
- parser = argparse.ArgumentParser(
- description='Convert HEX HRESULT to signed integer.')
- parser.add_argument('-i',
- '--input',
- help='The input file containing HRESULT defines',
- required=True)
- parser.add_argument('-o',
- '--output',
- help='The output file containing enums.xml entries',
- required=True)
- args = parser.parse_args()
- with open(args.input, 'r') as f:
- new_source = _ConvertAllHresultDefines(f.read())
- with open(args.output, 'w', newline='\n') as f:
- f.write(new_source)
- if __name__ == '__main__':
- sys.exit(main())
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