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#
# Copyright (c) 2008, Mahadevan R 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 of this software, 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
# OWNER 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.
#
"""Utility functions and classes.
Used only in other modules, not for public use."""
import llvm
import llvm._core as _core # for PyCObjectVoidPtrToPyLong
#===----------------------------------------------------------------------===
# A set of helpers to check various things. Raises exceptions on
# failures.
#===----------------------------------------------------------------------===
def check_gen(obj, typ):
if not isinstance(obj, typ):
typ_str = typ.__name__
msg = "argument not an instance of llvm.core.%s" % typ_str
raise TypeError, msg
def check_is_unowned(ownable):
if ownable.owner:
raise llvm.LLVMException, "object is already owned"
#===----------------------------------------------------------------------===
# A set of helpers to unpack a list of Python wrapper objects
# into a list of PyCObject wrapped objects, checking types along
# the way.
#===----------------------------------------------------------------------===
def unpack_gen(objlist, check_fn):
for obj in objlist: check_fn(obj)
return [ obj.ptr for obj in objlist ]
#===----------------------------------------------------------------------===
# Helper to wrap over iterables (LLVMFirstXXX, LLVMNextXXX). This used
# to be a generator, but that loses subscriptability of the result, so
# we now return a list.
#===----------------------------------------------------------------------===
def wrapiter(first, next, container, wrapper):
ret = []
ptr = first(container)
while ptr:
ret.append(wrapper(ptr))
ptr = next(ptr)
return ret
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