From 3bf9df6b2785fa6d951086978a3e66f49427166a Mon Sep 17 00:00:00 2001
From: FluorescentCIAAfricanAmerican <0934gj3049fk@protonmail.com>
Date: Wed, 22 Apr 2020 12:56:21 -0400
Subject: 1

---
 common/GameUI/ObjectList.cpp | 243 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 243 insertions(+)
 create mode 100644 common/GameUI/ObjectList.cpp

(limited to 'common/GameUI/ObjectList.cpp')

diff --git a/common/GameUI/ObjectList.cpp b/common/GameUI/ObjectList.cpp
new file mode 100644
index 0000000..7da1100
--- /dev/null
+++ b/common/GameUI/ObjectList.cpp
@@ -0,0 +1,243 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+#include <stdio.h>
+#include <malloc.h>
+#include "ObjectList.h"
+#include "tier1/strtools.h"
+
+//#include "port.h"
+//#include "mem.h"
+// memdbgon must be the last include file in a .cpp file!!!
+#include <tier0/memdbgon.h>
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+ObjectList::ObjectList()
+{
+	head = tail = current = NULL;
+	number = 0;
+}
+
+ObjectList::~ObjectList()
+{
+	Clear( false );
+}
+
+bool ObjectList::AddHead(void * newObject)
+{
+	// create new element
+	element_t * newElement = (element_t *) calloc(1, sizeof(element_t));
+
+	if (newElement == NULL )
+		return false; // out of memory
+
+	// insert element
+	newElement->object = newObject;
+
+	if (head)
+	{
+		newElement->next = head;
+		head->prev = newElement;
+	};
+
+	head = newElement;
+	
+	// if list was empty set new tail
+	if (tail==NULL) tail = head;	
+
+	number++;
+
+	return true;
+
+}
+
+void * ObjectList::RemoveHead()
+{
+	void * retObj;
+	
+	// check head is present
+	if (head)
+	{
+		retObj = head->object;
+		element_t * newHead  = head->next;
+		if (newHead) newHead->prev = NULL;
+
+		// if only one element is in list also update tail
+		// if we remove this prev element
+		if (tail==head) tail = NULL;
+
+		free(head);
+		head = newHead;
+
+		number--;
+
+	} else
+	  retObj = NULL;
+
+	return retObj;
+}
+
+bool ObjectList::AddTail(void * newObject)
+{
+	element_t * newElement = (element_t *) calloc(1, sizeof(element_t));
+
+	if (newElement == NULL) 
+		return false; // out of memory;
+
+	newElement->object = newObject;
+
+	if (tail)
+	{
+		newElement->prev = tail;
+		tail->next = newElement;
+	}
+
+	tail = newElement;
+
+	// if list was empty set new head
+	if (head==NULL) head = tail;
+
+	number++;
+
+	return true;
+
+}
+
+void * ObjectList::RemoveTail()
+{
+	void * retObj;
+	
+	// check tail is present
+	if (tail)
+	{
+		retObj = tail->object;
+		element_t * newTail  = tail->prev;
+		if (newTail) newTail->next = NULL;
+
+		// if only one element is in list also update tail
+		// if we remove this prev element
+		if (head==tail) head = NULL;
+
+		free(tail);
+		tail = newTail;
+
+		number--;
+
+	} else
+		retObj = NULL;
+
+	return retObj;
+}
+
+bool ObjectList::IsEmpty()
+{
+	return ( head == NULL );
+}
+
+int ObjectList::CountElements()
+{
+	return number;
+}
+
+bool ObjectList::Contains(void * object)
+{
+	element_t * e = head;
+
+	while(e && e->object!=object) { e = e->next;}
+
+	if ( e )
+	{
+		current = e;
+		return true;
+	}
+	else
+	{
+		return false;
+	}
+}
+
+void ObjectList::Clear( bool freeElementsMemory )
+{
+	element_t * ne;
+
+	element_t * e = head;
+	while(e)
+	{
+		ne = e->next; 
+
+		if ( freeElementsMemory && e->object )
+			free( e->object );
+
+		free(e);
+		e = ne; 
+	}
+
+	head = tail = current = NULL;
+	number = 0;
+
+}
+
+bool ObjectList::Remove( void * object )
+{
+	element_t * e = head;
+
+	while(e && e->object!=object) { e = e->next;}
+
+	if (e!=NULL)
+	{
+		if (e->prev) e->prev->next = e->next;
+		if (e->next) e->next->prev = e->prev;
+		if (head==e) head = e->next;
+		if (tail==e) tail = e->prev;
+		if (current == e) current= e->next;
+		free(e);
+		number--;
+	}
+
+	return (e!=NULL);
+}
+
+void ObjectList::Init()
+{
+	head = tail = current = NULL;
+	number = 0;
+}
+
+void * ObjectList::GetFirst()
+{
+	if (head)
+	{
+		current = head->next;
+		return head->object;
+	} 
+	else
+	{
+		current = NULL;
+		return NULL;
+	};
+	
+}
+
+void * ObjectList::GetNext()
+{
+	void * retObj = NULL;
+	if (current)
+	{	
+		retObj = current->object;
+		current = current->next;
+	}
+	return retObj;
+}
+
+bool ObjectList::Add(void *newObject)
+{
+	return AddTail( newObject );
+}
+
-- 
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