\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// File Manager

File Manager

Path: /opt/imunify360/venv/lib64/python3.11/site-packages/maxminddb/

Viewing File: file.py

"""For internal use only. It provides a slice-like file reader."""

import os
from typing import Union

try:
    # pylint: disable=no-name-in-module
    from multiprocessing import Lock
except ImportError:
    from threading import Lock  # type: ignore


class FileBuffer:
    """A slice-able file reader"""

    def __init__(self, database: str) -> None:
        # pylint: disable=consider-using-with
        self._handle = open(database, "rb")
        self._size = os.fstat(self._handle.fileno()).st_size
        if not hasattr(os, "pread"):
            self._lock = Lock()

    def __getitem__(self, key: Union[slice, int]):
        if isinstance(key, slice):
            return self._read(key.stop - key.start, key.start)
        if isinstance(key, int):
            return self._read(1, key)[0]
        raise TypeError("Invalid argument type.")

    def rfind(self, needle: bytes, start: int) -> int:
        """Reverse find needle from start"""
        pos = self._read(self._size - start - 1, start).rfind(needle)
        if pos == -1:
            return pos
        return start + pos

    def size(self) -> int:
        """Size of file"""
        return self._size

    def close(self) -> None:
        """Close file"""
        self._handle.close()

    if hasattr(os, "pread"):

        def _read(self, buffersize: int, offset: int) -> bytes:
            """read that uses pread"""
            # pylint: disable=no-member
            return os.pread(self._handle.fileno(), buffersize, offset)

    else:

        def _read(self, buffersize: int, offset: int) -> bytes:
            """read with a lock

            This lock is necessary as after a fork, the different processes
            will share the same file table entry, even if we dup the fd, and
            as such the same offsets. There does not appear to be a way to
            duplicate the file table entry and we cannot re-open based on the
            original path as that file may have replaced with another or
            unlinked.
            """
            with self._lock:
                self._handle.seek(offset)
                return self._handle.read(buffersize)