92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
/**
|
|
* PANDA 3D SOFTWARE
|
|
* Copyright (c) Carnegie Mellon University. All rights reserved.
|
|
*
|
|
* All use of this software is subject to the terms of the revised BSD
|
|
* license. You should have received a copy of this license along
|
|
* with this source code in a file named "LICENSE."
|
|
*
|
|
* @file parameterRemapConcreteToPointer.cxx
|
|
* @author drose
|
|
* @date 2000-08-01
|
|
*/
|
|
|
|
#include "parameterRemapConcreteToPointer.h"
|
|
#include "interrogate.h"
|
|
#include "interrogateBuilder.h"
|
|
#include "typeManager.h"
|
|
|
|
#include "cppType.h"
|
|
#include "cppDeclaration.h"
|
|
#include "cppConstType.h"
|
|
#include "cppPointerType.h"
|
|
|
|
/**
|
|
*
|
|
*/
|
|
ParameterRemapConcreteToPointer::
|
|
ParameterRemapConcreteToPointer(CPPType *orig_type) :
|
|
ParameterRemap(orig_type)
|
|
{
|
|
_new_type = TypeManager::wrap_pointer(orig_type);
|
|
}
|
|
|
|
/**
|
|
* Outputs an expression that converts the indicated variable from the new
|
|
* type to the original type, for passing into the actual C++ function.
|
|
*/
|
|
void ParameterRemapConcreteToPointer::
|
|
pass_parameter(ostream &out, const string &variable_name) {
|
|
if (variable_name.size() > 1 && variable_name[0] == '&') {
|
|
// Prevent generating something like *¶m Also, if this is really some
|
|
// local type, we can presumably just move it?
|
|
out << "MOVE(" << variable_name.substr(1) << ")";
|
|
} else {
|
|
out << "*" << variable_name;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns an expression that evalutes to the appropriate value type for
|
|
* returning from the function, given an expression of the original type.
|
|
*/
|
|
string ParameterRemapConcreteToPointer::
|
|
get_return_expr(const string &expression) {
|
|
return
|
|
"new " + _orig_type->get_local_name(&parser) +
|
|
"(" + expression + ")";
|
|
}
|
|
|
|
/**
|
|
* Returns true if the return value represents a value that was newly
|
|
* allocated, and hence must be explicitly deallocated later by the caller.
|
|
*/
|
|
bool ParameterRemapConcreteToPointer::
|
|
return_value_needs_management() {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* If return_value_needs_management() returns true, this should return the
|
|
* index of the function that should be called when it is time to destruct the
|
|
* return value. It will generally be the same as the destructor for the
|
|
* class we just returned a pointer to.
|
|
*/
|
|
FunctionIndex ParameterRemapConcreteToPointer::
|
|
get_return_value_destructor() {
|
|
return builder.get_destructor_for(_orig_type);
|
|
}
|
|
|
|
/**
|
|
* This is a hack around a problem VC++ has with overly-complex expressions,
|
|
* particularly in conjunction with the 'new' operator. If this parameter
|
|
* type is one that will probably give VC++ a headache, this should be set
|
|
* true to indicate that the code generator should save the return value
|
|
* expression into a temporary variable first, and pass the temporary variable
|
|
* name in instead.
|
|
*/
|
|
bool ParameterRemapConcreteToPointer::
|
|
return_value_should_be_simple() {
|
|
return true;
|
|
}
|