110 lines
4.5 KiB
C++
110 lines
4.5 KiB
C++
// Filename: parameterRemapConcreteToPointer.cxx
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// Created by: drose (01Aug00)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://etc.cmu.edu/panda3d/docs/license/ .
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//
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// To contact the maintainers of this program write to
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// panda3d-general@lists.sourceforge.net .
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//
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////////////////////////////////////////////////////////////////////
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#include "parameterRemapConcreteToPointer.h"
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#include "interrogate.h"
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#include "interrogateBuilder.h"
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#include "typeManager.h"
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#include "cppType.h"
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#include "cppDeclaration.h"
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#include "cppConstType.h"
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#include "cppPointerType.h"
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////////////////////////////////////////////////////////////////////
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// Function: ParameterRemapConcreteToPointer::Constructor
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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ParameterRemapConcreteToPointer::
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ParameterRemapConcreteToPointer(CPPType *orig_type) :
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ParameterRemap(orig_type)
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{
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_new_type = TypeManager::wrap_pointer(orig_type);
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}
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////////////////////////////////////////////////////////////////////
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// Function: ParameterRemapConcreteToPointer::pass_parameter
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// Access: Public, Virtual
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// Description: Outputs an expression that converts the indicated
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// variable from the new type to the original type, for
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// passing into the actual C++ function.
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////////////////////////////////////////////////////////////////////
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void ParameterRemapConcreteToPointer::
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pass_parameter(ostream &out, const string &variable_name) {
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out << "*" << variable_name;
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}
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////////////////////////////////////////////////////////////////////
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// Function: ParameterRemapConcreteToPointer::get_return_expr
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// Access: Public, Virtual
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// Description: Returns an expression that evalutes to the
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// appropriate value type for returning from the
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// function, given an expression of the original type.
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////////////////////////////////////////////////////////////////////
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string ParameterRemapConcreteToPointer::
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get_return_expr(const string &expression) {
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return
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"new " + _orig_type->get_local_name(&parser) +
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"(" + expression + ")";
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}
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////////////////////////////////////////////////////////////////////
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// Function: ParameterRemapConcreteToPointer::return_value_needs_management
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// Access: Public, Virtual
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// Description: Returns true if the return value represents a value
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// that was newly allocated, and hence must be
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// explicitly deallocated later by the caller.
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////////////////////////////////////////////////////////////////////
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bool ParameterRemapConcreteToPointer::
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return_value_needs_management() {
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return true;
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}
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////////////////////////////////////////////////////////////////////
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// Function: ParameterRemapConcreteToPointer::get_return_value_destructor
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// Access: Public, Virtual
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// Description: If return_value_needs_management() returns true, this
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// should return the index of the function that should
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// be called when it is time to destruct the return
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// value. It will generally be the same as the
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// destructor for the class we just returned a pointer
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// to.
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////////////////////////////////////////////////////////////////////
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FunctionIndex ParameterRemapConcreteToPointer::
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get_return_value_destructor() {
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return builder.get_destructor_for(_orig_type);
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}
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////////////////////////////////////////////////////////////////////
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// Function: ParameterRemapConcreteToPointer::return_value_should_be_simple
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// Access: Public, Virtual
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// Description: This is a hack around a problem VC++ has with
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// overly-complex expressions, particularly in
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// conjunction with the 'new' operator. If this
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// parameter type is one that will probably give VC++ a
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// headache, this should be set true to indicate that
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// the code generator should save the return value
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// expression into a temporary variable first, and pass
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// the temporary variable name in instead.
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////////////////////////////////////////////////////////////////////
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bool ParameterRemapConcreteToPointer::
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return_value_should_be_simple() {
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return true;
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}
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