#  This file is part of the myhdl library, a Python package for using
#  Python as a Hardware Description Language.
#
#  Copyright (C) 2003-2009 Jan Decaluwe
#
#  The myhdl library is free software; you can redistribute it and/or
#  modify it under the terms of the GNU Lesser General Public License as
#  published by the Free Software Foundation; either version 2.1 of the
#  License, or (at your option) any later version.
#
#  This library is distributed in the hope that it will be useful, but
#  WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#  Lesser General Public License for more details.
#
#  You should have received a copy of the GNU Lesser General Public
#  License along with this library; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

""" Module with utilility objects for MyHDL.

"""


import ast
import exceptions
import sys
import inspect
import re
from types import FunctionType, GeneratorType, ListType, TupleType

from tokenize import generate_tokens, untokenize, INDENT
from cStringIO import StringIO


def _printExcInfo():
    kind, value  = sys.exc_info()[:2]
    msg = str(kind)
    # msg = msg[msg.rindex('.')+1:]
    if str(value):
        msg += ": %s" % value
        print >> sys.stderr, msg

_isGenFunc = inspect.isgeneratorfunction

def _flatten(*args):
    arglist = []
    for arg in args:
        if isinstance(arg, (list, tuple, set)):
            for item in arg:
                arglist.extend(_flatten(item))
        else:
            arglist.append(arg)
    return arglist

def _isTupleOfInts(obj):
    if not isinstance(obj, tuple):
        return False
    for e in obj:
        if not isinstance(e, (int, long)):
            return False
    return True

def _dedent(s):
    """Dedent python code string."""

    result = [t[:2] for t in generate_tokens(StringIO(s).readline)]
    # set initial indent to 0 if any
    if result[0][0] == INDENT:
        result[0] = (INDENT, '')
    return untokenize(result)

def _makeAST(f):
    s = inspect.getsource(f)
    s = _dedent(s)
    tree = ast.parse(s)
    tree.sourcefile = inspect.getsourcefile(f)
    tree.lineoffset = inspect.getsourcelines(f)[1]-1
    return tree

def _genfunc(gen):
    from myhdl._always_comb import _AlwaysComb
    from myhdl._always_seq import _AlwaysSeq
    from myhdl._always import _Always
    if isinstance(gen, (_AlwaysComb, _AlwaysSeq, _Always)):
        func = gen.func
    else:
        func = gen.genfunc
    return func

#  This file is part of the myhdl library, a Python package for using
#  Python as a Hardware Description Language.
#
#  Copyright (C) 2003-2009 Jan Decaluwe
#
#  The myhdl library is free software; you can redistribute it and/or
#  modify it under the terms of the GNU Lesser General Public License as
#  published by the Free Software Foundation; either version 2.1 of the
#  License, or (at your option) any later version.
#
#  This library is distributed in the hope that it will be useful, but
#  WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#  Lesser General Public License for more details.
#
#  You should have received a copy of the GNU Lesser General Public
#  License along with this library; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

""" Module with utilility objects for MyHDL.

"""


import ast
import sys
import inspect

from tokenize import generate_tokens, untokenize, INDENT
from cStringIO import StringIO


def _printExcInfo():
    kind, value = sys.exc_info()[:2]
    msg = str(kind)
    # msg = msg[msg.rindex('.')+1:]
    if str(value):
        msg += ": %s" % value
        print >> sys.stderr, msg

_isGenFunc = inspect.isgeneratorfunction


def _flatten(*args):
    arglist = []
    for arg in args:
        if isinstance(arg, (list, tuple, set)):
            for item in arg:
                arglist.extend(_flatten(item))
        else:
            arglist.append(arg)
    return arglist


def _isTupleOfInts(obj):
    if not isinstance(obj, tuple):
        return False
    for e in obj:
        if not isinstance(e, (int, long)):
            return False
    return True


def _dedent(s):
    """Dedent python code string."""

    result = [t[:2] for t in generate_tokens(StringIO(s).readline)]
    # set initial indent to 0 if any
    if result[0][0] == INDENT:
        result[0] = (INDENT, '')
    return untokenize(result)


def _makeAST(f):
    s = inspect.getsource(f)
    s = _dedent(s)
    tree = ast.parse(s)
    tree.sourcefile = inspect.getsourcefile(f)
    tree.lineoffset = inspect.getsourcelines(f)[1]-1
    return tree


def _genfunc(gen):
    from myhdl._always_comb import _AlwaysComb
    from myhdl._always_seq import _AlwaysSeq
    from myhdl._always import _Always
    if isinstance(gen, (_AlwaysComb, _AlwaysSeq, _Always)):
        func = gen.func
    else:
        func = gen.genfunc
    return func

remove unused imports