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#
# This file is part of pyasn1 software.
#
# Copyright (c) 2005-2017, Ilya Etingof <etingof@gmail.com>
# License: http://snmplabs.com/pyasn1/license.html
#
import logging
from pyasn1 import __version__
from pyasn1 import error
from pyasn1.compat.octets import octs2ints
__all__ = ['Debug', 'setLogger', 'hexdump']
flagNone = 0x0000
flagEncoder = 0x0001
flagDecoder = 0x0002
flagAll = 0xffff
flagMap = {
'none': flagNone,
'encoder': flagEncoder,
'decoder': flagDecoder,
'all': flagAll
}
class Printer(object):
# noinspection PyShadowingNames
def __init__(self, logger=None, handler=None, formatter=None):
if logger is None:
logger = logging.getLogger('pyasn1')
logger.setLevel(logging.DEBUG)
if handler is None:
handler = logging.StreamHandler()
if formatter is None:
formatter = logging.Formatter('%(asctime)s %(name)s: %(message)s')
handler.setFormatter(formatter)
handler.setLevel(logging.DEBUG)
logger.addHandler(handler)
self.__logger = logger
def __call__(self, msg):
self.__logger.debug(msg)
def __str__(self):
return '<python logging>'
if hasattr(logging, 'NullHandler'):
NullHandler = logging.NullHandler
else:
# Python 2.6 and older
class NullHandler(logging.Handler):
def emit(self, record):
pass
class Debug(object):
defaultPrinter = Printer()
def __init__(self, *flags, **options):
self._flags = flagNone
if 'loggerName' in options:
# route our logs to parent logger
self._printer = Printer(
logger=logging.getLogger(options['loggerName']),
handler=NullHandler()
)
elif 'printer' in options:
self._printer = options.get('printer')
else:
self._printer = self.defaultPrinter
self._printer('running pyasn1 %s, debug flags %s' % (__version__, ', '.join(flags)))
for flag in flags:
inverse = flag and flag[0] in ('!', '~')
if inverse:
flag = flag[1:]
try:
if inverse:
self._flags &= ~flagMap[flag]
else:
self._flags |= flagMap[flag]
except KeyError:
raise error.PyAsn1Error('bad debug flag %s' % flag)
self._printer("debug category '%s' %s" % (flag, inverse and 'disabled' or 'enabled'))
def __str__(self):
return 'logger %s, flags %x' % (self._printer, self._flags)
def __call__(self, msg):
self._printer(msg)
def __and__(self, flag):
return self._flags & flag
def __rand__(self, flag):
return flag & self._flags
logger = 0
def setLogger(userLogger):
global logger
if userLogger:
logger = userLogger
else:
logger = 0
def hexdump(octets):
return ' '.join(
['%s%.2X' % (n % 16 == 0 and ('\n%.5d: ' % n) or '', x)
for n, x in zip(range(len(octets)), octs2ints(octets))]
)
class Scope(object):
def __init__(self):
self._list = []
def __str__(self): return '.'.join(self._list)
def push(self, token):
self._list.append(token)
def pop(self):
return self._list.pop()
scope = Scope()