Important Update:

- DataTreeCore:
  - Add Parent & Prev Child links to DataMembers
  - Update CreateMember() to set Parent/Sibling reference
      & increase Parent->Len
  - Remove AddMember()
  - Update DestroyMember() to decrease Parent->Len
- JSONparseCore:
  - Update ParseArray() for above changes made to DataTreeCore

DataTreeCore.cpp

@@ -17,7 +17,7 @@
 CDataTree::CDataTree()
 {
     // Create Root member of tree
-    RootMember = CreateMember( NULL );
+    RootMember = CreateMember( NULL, NULL, NULL );
     RootMember->Type = jtObject;
 }
 //---------------------------------------------------------------------------
@@ -30,7 +30,7 @@ CDataTree::~CDataTree()
 }
 //---------------------------------------------------------------------------
 
-TDataMember *  CDataTree::CreateMember( const char * Name, const int Len )
+TDataMember *  CDataTree::CreateMember( TDataMember * Parent, TDataMember * PrevChild, const char * Name, const int Len )
 {
     TDataMember    * Member;
 
@@ -45,43 +45,38 @@ TDataMember *  CDataTree::CreateMember( const char * Name, const int Len )
         memcpy( Member->Name, Name, Member->NameLen );
         Member->Name[ Member->NameLen ] = 0;
     }
+
+    // Update Parent
+    if (Parent) {
+        Member->Parent = Parent;
+        Parent->Len++;
+    }
+
+    // Set Sibling links
+    Member->Prev   = PrevChild;
+    Member->Next   = NULL;
+
     return Member;
 }
 //---------------------------------------------------------------------------
 
-bool  CDataTree::AddMember( TDataMember * Parent, TDataMember * Member )
-{
-    TDataMember     ** Child;
 
-    // Validate
-    if (!Parent || !Member) {
-        return false;
-    }
-
-    // Get end of list
-    Child = &(Parent->FirstChild);
-    while (*Child) {
-        Child = &((*Child)->Next);
-    }
-
-    // Add member
-    *Child = Member;
-    Parent->Len++;
-    return true;
-}
-//---------------------------------------------------------------------------
 
 bool  CDataTree::DestroyMember( TDataMember ** Member )
 {
     TDataMember    * NextMember;
 
-    // Valdate
+    // Validate
     if (!Member || !*Member)
         return false;
 
     // Get next param in list
     NextMember = (*Member)->Next;
 
+    // Update Parent
+    if ((*Member)->Parent)
+        (*Member)->Parent->Len--;
+
     // Destroy
     if ((*Member)->Name)
         free( (*Member)->Name );
@@ -102,7 +97,7 @@ bool  CDataTree::DestroyMember( TDataMember ** Member )
 
 bool  CDataTree::DestroyValue( TDataMember * Member )
 {
-    // Valdate
+    // Validate
     if (!Member)
         return false;
 
@@ -111,10 +106,12 @@ bool  CDataTree::DestroyValue( TDataMember * Member )
         free( Member->Value );
         Member->Value = NULL;
     }
+
+    // Destroy Children
     while (Member->FirstChild) {
         DestroyMember( &(Member->FirstChild) );
     }
-    Member->Len = 0;
+
     return true;
 }
 //---------------------------------------------------------------------------
@@ -122,7 +119,8 @@ bool  CDataTree::DestroyValue( TDataMember * Member )
 TDataMember **  CDataTree::GetMemberPtr( TDataMember * BaseMember, const char * Path, bool Create, TDataMember ** Parent )
 {
     TDataMember     * Member;
-    TDataMember     ** Child        = NULL;
+    TDataMember     ** Child;
+    TDataMember     * PrevChild;
     char            * Pos;
     char            * EndPos;
     char            * Key;
@@ -182,10 +180,13 @@ TDataMember **  CDataTree::GetMemberPtr( TDataMember * BaseMember, const char *
                 Index = -1;
 
                 // find end of list
+                PrevChild = NULL;
                 Child = &(Member->FirstChild);
-                while (*Child)
+                while (*Child) {
+                    PrevChild = *Child;
                     Child = &((*Child)->Next);
                 }
+            }
             else {
                 // Get requested index
                 Index = (int)strtoul( Key, &EndPos, 10 );
@@ -193,9 +194,11 @@ TDataMember **  CDataTree::GetMemberPtr( TDataMember * BaseMember, const char *
                     break;
 
                 // Find element at requested index
+                PrevChild = NULL;
                 Child = &(Member->FirstChild);
                 Count = 0;
                 while (*Child && (Count < Index)) {
+                    PrevChild = *Child;
                     Child = &((*Child)->Next);
                     Count++;
                 }
@@ -204,8 +207,7 @@ TDataMember **  CDataTree::GetMemberPtr( TDataMember * BaseMember, const char *
             // Create element if needed
             if (!*Child && Create) {
                 if ((Index == -1) || (Index = Count + 1)) {
-                    *Child = CreateMember( NULL );
+                    *Child = CreateMember( Member, PrevChild, NULL );
-                    Member->Len++;
                 }
             }
         }
@@ -238,13 +240,14 @@ TDataMember **  CDataTree::GetMemberPtr( TDataMember * BaseMember, const char *
             }
 
             // Find next parent
+            PrevChild = NULL;
             Child = &(Member->FirstChild);
             while (*Child && (((*Child)->NameLen != KeyLen) || strncasecmp( (*Child)->Name, Key, KeyLen ))) {
+                PrevChild = *Child;
                 Child = &((*Child)->Next);
             }
             if (!*Child && Create) {
-                *Child = CreateMember( Key, KeyLen );
+                *Child = CreateMember( Member, PrevChild, Key, KeyLen );
-                Member->Len++;
             }
         }
 
@@ -324,7 +327,6 @@ bool  CDataTree::Delete( TDataMember * BaseMember, const char * Path )
     else if ((Member = GetMemberPtr( BaseMember, Path, false, &Parent ))) {
         // If valid path, destroy member
         DestroyMember( Member );
-        Parent->Len--;
         return true;
     }
     else {

DataTreeCore.h

@@ -34,6 +34,8 @@ struct SDataMember
     char            * Value;
     unsigned short  Len;
 
+    TDataMember     * Parent;
+    TDataMember     * Prev;
     TDataMember     * Next;
 };
 
@@ -45,8 +47,7 @@ private:
     TDataMember     * RootMember;
 
     // Manage Members
-    TDataMember *   CreateMember( const char * Name,  const int Len = -1 );
+    TDataMember *   CreateMember( TDataMember * Parent, TDataMember * PrevChild, const char * Name, const int Len = -1 );
-    bool            AddMember( TDataMember * Parent, TDataMember * Member );
     bool            DestroyMember( TDataMember ** Member );
     bool            DestroyValue( TDataMember * Member );
 
@@ -68,8 +69,10 @@ public:
     TDataMember *       GetIndexChild( TDataMember * Parent, const int Index );
     TDataMember *       GetFirstChild( TDataMember * Parent, const char * Path, bool Create = false  );
 
+    inline TDataMember *    GetParent( TDataMember * Child )        { return ((Child)?  Child->Parent : NULL); };
     inline TDataMember *    GetFirstChild( TDataMember * Parent )   { return ((Parent)? Parent->FirstChild : NULL); };
-    inline TDataMember *    GetNextChild( TDataMember * PrevChild )   { return ((PrevChild)? PrevChild->Next : NULL); };
+    inline TDataMember *    GetPrevChild( TDataMember * Child )     { return ((Child)?  Child->Prev : NULL); };
+    inline TDataMember *    GetNextChild( TDataMember * Child )     { return ((Child)?  Child->Next : NULL); };
 
     const char *    GetStr(   TDataMember * BaseMember, const char * Path, const char * Default = NULL, bool Create = false );
     const char *    GetStr(   TDataMember * BaseMember, const char * Path, int &Len, const char * Default = NULL, bool Create = false );

JSONparseCore.cpp

@@ -598,7 +598,8 @@ bool CJSONparse::ParseObject( TDataMember * Object )
 
 bool CJSONparse::ParseArray( TDataMember * Array )
 {
-    TDataMember     * Member        = NULL;
+    TDataMember     ** Member;
+    TDataMember     * PrevMember;
 
     // Check for start of Object
     if (*BufPos != '[') {
@@ -608,7 +609,8 @@ bool CJSONparse::ParseArray( TDataMember * Array )
 
     // Set Type
     DataTree->SetValue( Array, jtArray );
-
+    Member = &(Array->FirstChild);
+    PrevMember = NULL;
     while (true)
     {
         // Look for Member Name
@@ -618,17 +620,18 @@ bool CJSONparse::ParseArray( TDataMember * Array )
         }
 
         // Add new element
-        Member = DataTree->CreateMember( NULL );
+        *Member = DataTree->CreateMember( Array, PrevMember, NULL );
 
         // Get Value
         SkipWhiteSpace();
-        if (!ParseObject( Member ) && !Error && !ParseArray( Member ) && !Error && !ParseString( Member ) && !Error && !ParsePrimitive( Member ) ) {}
+        if (!ParseObject( *Member ) && !Error && !ParseArray( *Member ) && !Error && !ParseString( *Member ) && !Error && !ParsePrimitive( *Member ) ) {}
         if (Error) {
-            DataTree->DestroyMember( &Member );
+            DataTree->DestroyMember( Member );
             return false;
         }
         else {
-            DataTree->AddMember( Array, Member );
+            PrevMember = *Member;
+            Member = &((*Member)->Next);
         }
 
         // Check if more parameters to follow