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84 lines
2.5 KiB
Python
84 lines
2.5 KiB
Python
#!/usr/bin/python3
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# Processing of symbols and abilist files.
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# Copyright (C) 2020-2023 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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#
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <https://www.gnu.org/licenses/>.
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"""Symbol processing for glibc."""
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import os
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def replace_file(path, new_contents):
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"""Atomically replace PATH with lines from NEW_CONTENTS.
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NEW_CONTENTS must be a sequence of strings.
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"""
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temppath = path + 'T'
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with open(temppath, 'w') as out:
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for line in new_contents:
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out.write(line)
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os.rename(temppath, path)
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class VersionedSymbol:
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"""A combination of a symbol and its version."""
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def __init__(self, symbol, version):
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"""Construct a new versioned symbol."""
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assert symbol
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assert version
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self.symbol = symbol
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self.version = version
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def __str__(self):
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return self.symbol + '@' + self.version
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def __eq__(self, other):
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return self.symbol == other.symbol and self.version == other.version
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def __hash__(self):
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return hash(self.symbol) ^ hash(self.version)
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def read_abilist(path):
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"""Read the abilist file at PATH.
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Return a dictionary from VersionedSymbols to their flags (as
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strings).
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"""
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result = {}
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with open(path) as inp:
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for line in inp:
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version, symbol, flags = line.strip().split(' ', 2)
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versym = VersionedSymbol(symbol, version)
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if versym in result:
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raise IOError("{}: duplicate symbol {}".format(path, versym))
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result[versym] = flags
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return result
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def abilist_lines(symbols):
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"""Build the abilist file contents (as a list of lines).
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SYMBOLS is a dictionary from VersionedSymbols to their flags.
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"""
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result = []
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for versym, flags in symbols.items():
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result.append('{} {} {}\n'.format(
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versym.version, versym.symbol, flags))
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result.sort()
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return result
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