src/kits/debugger/value/value_nodes/PointerToMemberValueNode.cpp

   1 /*
   2  * Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include "PointerToMemberValueNode.h"
   8
   9 #include <new>
  10
  11 #include "Architecture.h"
  12 #include "IntegerValue.h"
  13 #include "Tracing.h"
  14 #include "Type.h"
  15 #include "ValueLoader.h"
  16 #include "ValueLocation.h"
  17
  18
  19 PointerToMemberValueNode::PointerToMemberValueNode(ValueNodeChild* nodeChild,
  20         PointerToMemberType* type)
  21         :
  22         ChildlessValueNode(nodeChild),
  23         fType(type)
  24 {
  25         fType->AcquireReference();
  26 }
  27
  28
  29 PointerToMemberValueNode::~PointerToMemberValueNode()
  30 {
  31         fType->ReleaseReference();
  32 }
  33
  34
  35 Type*
  36 PointerToMemberValueNode::GetType() const
  37 {
  38         return fType;
  39 }
  40
  41
  42 status_t
  43 PointerToMemberValueNode::ResolvedLocationAndValue(ValueLoader* valueLoader,
  44         ValueLocation*& _location, Value*& _value)
  45 {
  46         // get the location
  47         ValueLocation* location = NodeChild()->Location();
  48         if (location == NULL)
  49                 return B_BAD_VALUE;
  50
  51         TRACE_LOCALS("  TYPE_POINTER_TO_MEMBER\n");
  52
  53         // get the value type
  54         type_code valueType;
  55         if (valueLoader->GetArchitecture()->AddressSize() == 4) {
  56                 valueType = B_UINT32_TYPE;
  57                 TRACE_LOCALS("    -> 32 bit\n");
  58         } else {
  59                 valueType = B_UINT64_TYPE;
  60                 TRACE_LOCALS("    -> 64 bit\n");
  61         }
  62
  63         // load the value data
  64         BVariant valueData;
  65         status_t error = valueLoader->LoadValue(location, valueType, false,
  66                 valueData);
  67         if (error != B_OK)
  68                 return error;
  69
  70         // create the type object
  71         Value* value = new(std::nothrow) IntegerValue(valueData);
  72         if (value == NULL)
  73                 return B_NO_MEMORY;
  74
  75         location->AcquireReference();
  76         _location = location;
  77         _value = value;
  78         return B_OK;
  79 }