Mercurial > hg
view hgext/fsmonitor/pywatchman/load.py @ 48946:642e31cb55f0
py3: use class X: instead of class X(object):
The inheritance from object is implied in Python 3. So this should
be equivalent.
This change was generated via an automated search and replace. So there
may have been some accidental changes.
Differential Revision: https://phab.mercurial-scm.org/D12352
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Mon, 21 Feb 2022 13:08:28 -0700 |
parents | 6000f5b25c9b |
children | f58f955adad4 |
line wrap: on
line source
# Copyright 2016 Facebook, Inc. # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are met: # # * Redistributions of source code must retain the above copyright notice, # this list of conditions and the following disclaimer. # # * Redistributions in binary form must reproduce the above copyright notice, # this list of conditions and the following disclaimer in the documentation # and/or other materials provided with the distribution. # # * Neither the name Facebook nor the names of its contributors may be used to # endorse or promote products derived from this software without specific # prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # no unicode literals import ctypes try: from . import bser except ImportError: from . import pybser as bser EMPTY_HEADER = b"\x00\x01\x05\x00\x00\x00\x00" def _read_bytes(fp, buf): """Read bytes from a file-like object @param fp: File-like object that implements read(int) @type fp: file @param buf: Buffer to read into @type buf: bytes @return: buf """ # Do the first read without resizing the input buffer offset = 0 remaining = len(buf) while remaining > 0: l = fp.readinto((ctypes.c_char * remaining).from_buffer(buf, offset)) if l is None or l == 0: return offset offset += l remaining -= l return offset def load(fp, mutable=True, value_encoding=None, value_errors=None): """Deserialize a BSER-encoded blob. @param fp: The file-object to deserialize. @type file: @param mutable: Whether to return mutable results. @type mutable: bool @param value_encoding: Optional codec to use to decode values. If unspecified or None, return values as bytestrings. @type value_encoding: str @param value_errors: Optional error handler for codec. 'strict' by default. The other most common argument is 'surrogateescape' on Python 3. If value_encoding is None, this is ignored. @type value_errors: str """ buf = ctypes.create_string_buffer(8192) SNIFF_BUFFER_SIZE = len(EMPTY_HEADER) header = (ctypes.c_char * SNIFF_BUFFER_SIZE).from_buffer(buf) read_len = _read_bytes(fp, header) if read_len < len(header): return None total_len = bser.pdu_len(buf) if total_len > len(buf): ctypes.resize(buf, total_len) body = (ctypes.c_char * (total_len - len(header))).from_buffer( buf, len(header) ) read_len = _read_bytes(fp, body) if read_len < len(body): raise RuntimeError("bser data ended early") return bser.loads( (ctypes.c_char * total_len).from_buffer(buf, 0), mutable, value_encoding, value_errors, )