80 lines
3.2 KiB
Python
80 lines
3.2 KiB
Python
# Copyright 2009-2017 Wander Lairson Costa
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# Copyright 2009-2021 PyUSB contributors
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# 3. Neither the name of the copyright holder nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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__author__ = 'Wander Lairson Costa'
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__all__ = ['methodtrace', 'functiontrace']
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import logging
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import usb._interop as _interop
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_enable_tracing = False
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def enable_tracing(enable):
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global _enable_tracing
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_enable_tracing = enable
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def _trace_function_call(logger, fname, *args, **named_args):
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logger.debug(
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# TODO: check if 'f' is a method or a free function
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fname + '(' + \
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', '.join((str(val) for val in args)) + \
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', '.join((name + '=' + str(val) for name, val in named_args.items())) + ')'
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)
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# decorator for methods calls tracing
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def methodtrace(logger):
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def decorator_logging(f):
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if not _enable_tracing:
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return f
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def do_trace(*args, **named_args):
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# this if is just a optimization to avoid unecessary string formatting
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if logging.DEBUG >= logger.getEffectiveLevel():
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fn = type(args[0]).__name__ + '.' + f.__name__
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_trace_function_call(logger, fn, *args[1:], **named_args)
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return f(*args, **named_args)
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_interop._update_wrapper(do_trace, f)
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return do_trace
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return decorator_logging
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# decorator for methods calls tracing
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def functiontrace(logger):
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def decorator_logging(f):
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if not _enable_tracing:
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return f
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def do_trace(*args, **named_args):
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# this if is just a optimization to avoid unecessary string formatting
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if logging.DEBUG >= logger.getEffectiveLevel():
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_trace_function_call(logger, f.__name__, *args, **named_args)
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return f(*args, **named_args)
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_interop._update_wrapper(do_trace, f)
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return do_trace
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return decorator_logging
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