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Editing: iomemconquery.py

# Derived from portconquery.py
#
# SPDX-License-Identifier: LGPL-2.1-only
#
import logging
from typing import Iterable, Optional, Tuple

from .mixins import MatchContext
from .policyrep import Iomemcon, IomemconRange
from .query import PolicyQuery
from .util import match_range

class IomemconQuery(MatchContext, PolicyQuery):

"""
    Iomemcon context query.

Parameter:
    policy          The policy to query.

Keyword Parameters/Class attributes:
    addr            A 2-tuple of the memory addr range to match. (Set both to
                    the same value for a single mem addr)
    addr_subset     If true, the criteria will match if it is a subset
                    of the iomemcon's range.
    addr_overlap    If true, the criteria will match if it overlaps
                    any of the iomemcon's range.
    addr_superset   If true, the criteria will match if it is a superset
                    of the iomemcon's range.
    addr_proper     If true, use proper superset/subset operations.
                    No effect if not using set operations.

user            The criteria to match the context's user.
    user_regex      If true, regular expression matching
                    will be used on the user.

role            The criteria to match the context's role.
    role_regex      If true, regular expression matching
                    will be used on the role.

type_           The criteria to match the context's type.
    type_regex      If true, regular expression matching
                    will be used on the type.

range_          The criteria to match the context's range.
    range_subset    If true, the criteria will match if it is a subset
                    of the context's range.
    range_overlap   If true, the criteria will match if it overlaps
                    any of the context's range.
    range_superset  If true, the criteria will match if it is a superset
                    of the context's range.
    range_proper    If true, use proper superset/subset operations.
                    No effect if not using set operations.
    """

_addr: Optional[IomemconRange] = None
    addr_subset: bool = False
    addr_overlap: bool = False
    addr_superset: bool = False
    addr_proper: bool = False

@property
    def addr(self) -> Optional[IomemconRange]:
        return self._addr

@addr.setter
    def addr(self, value: Optional[Tuple[int, int]]) -> None:
        if value:
            pending_addr = IomemconRange(*value)

if pending_addr.low < 1 or pending_addr.high < 1:
                raise ValueError("Memory address must be positive: {0.low}-{0.high}".
                                 format(pending_addr))

if pending_addr.low > pending_addr.high:
                raise ValueError(
                    "The low mem addr must be smaller than the high mem addr: {0.low}-{0.high}".
                    format(pending_addr))

self._addr = pending_addr
        else:
            self._addr = None

def __init__(self, policy, **kwargs) -> None:
        super(IomemconQuery, self).__init__(policy, **kwargs)
        self.log = logging.getLogger(__name__)

def results(self) -> Iterable[Iomemcon]:
        """Generator which yields all matching iomemcons."""
        self.log.info("Generating results from {0.policy}".format(self))
        self.log.debug("Address: {0.addr!r}, overlap: {0.addr_overlap}, "
                       "subset: {0.addr_subset}, superset: {0.addr_superset}, "
                       "proper: {0.addr_proper}".format(self))
        self._match_context_debug(self.log)

for iomemcon in self.policy.iomemcons():

if self.addr and not match_range(
                    iomemcon.addr,
                    self.addr,
                    self.addr_subset,
                    self.addr_overlap,
                    self.addr_superset,
                    self.addr_proper):
                continue

if not self._match_context(iomemcon.context):
                continue

yield iomemcon

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