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63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
# This file is part of the myhdl library, a Python package for using
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# Python as a Hardware Description Language.
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#
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# Copyright (C) 2003-2008 Jan Decaluwe
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#
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# The myhdl library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public License as
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# published by the Free Software Foundation; either version 2.1 of the
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# License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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""" MyHDL miscellaneous public objects.
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This module provides the following public myhdl objects:
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instances -- function that returns instances in a generator function
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downrange -- function that returns a downward range
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"""
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import sys
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import inspect
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from types import GeneratorType
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from types import GeneratorType, ListType, TupleType
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from myhdl._Cosimulation import Cosimulation
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from myhdl._instance import _Instantiator
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def _isGenSeq(obj):
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if isinstance(obj, (Cosimulation, _Instantiator)):
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return True
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if not isinstance(obj, (ListType, TupleType, set)):
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return False
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## if not obj:
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## return False
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for e in obj:
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if not _isGenSeq(e):
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return False
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return True
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def instances():
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f = inspect.currentframe()
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d = inspect.getouterframes(f)[1][0].f_locals
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l = []
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for v in d.values():
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if _isGenSeq(v):
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l.append(v)
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return l
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def downrange(start, stop=0, step=1):
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""" Return a downward range. """
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return range(start-1, stop-1, -step)
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