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-rw-r--r--source3/ubi_dLinkList.c146
-rw-r--r--source3/ubi_dLinkList.h178
2 files changed, 324 insertions, 0 deletions
diff --git a/source3/ubi_dLinkList.c b/source3/ubi_dLinkList.c
new file mode 100644
index 0000000000..49bf495b9d
--- /dev/null
+++ b/source3/ubi_dLinkList.c
@@ -0,0 +1,146 @@
+/* ========================================================================== **
+ * ubi_dLinkList.c
+ *
+ * Copyright (C) 1997 by Christopher R. Hertel
+ *
+ * Email: crh@ubiqx.mn.org
+ * -------------------------------------------------------------------------- **
+ * This module implements simple doubly-linked lists.
+ * -------------------------------------------------------------------------- **
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * -------------------------------------------------------------------------- **
+ *
+ * Revision 0.3 1997/10/15 03:05:39 crh
+ * Added some handy type casting to the macros. Added AddHere and RemThis
+ * macros.
+ *
+ * Revision 0.2 1997/10/08 03:07:21 crh
+ * Fixed a few forgotten link-ups in Insert(), and fixed the AddHead()
+ * macro, which was passing the wrong value for <After> to Insert().
+ *
+ * Revision 0.1 1997/10/07 04:34:07 crh
+ * Initial Revision.
+ *
+ *
+ * ========================================================================== **
+ */
+
+#include "ubi_dLinkList.h"
+
+/* ========================================================================== **
+ * Functions...
+ */
+
+ubi_dlListPtr ubi_dlInitList( ubi_dlListPtr ListPtr )
+ /* ------------------------------------------------------------------------ **
+ * Initialize a doubly-linked list header.
+ *
+ * Input: ListPtr - A pointer to the list structure that is to be
+ * initialized for use.
+ *
+ * Output: A pointer to the initialized list header (i.e., same as
+ * <ListPtr>).
+ *
+ * ------------------------------------------------------------------------ **
+ */
+ {
+ ListPtr->Head = NULL;
+ ListPtr->Tail = NULL;
+ ListPtr->count = 0;
+ return( ListPtr );
+ } /* ubi_dlInitList */
+
+ubi_dlNodePtr ubi_dlInsert( ubi_dlListPtr ListPtr,
+ ubi_dlNodePtr New,
+ ubi_dlNodePtr After )
+ /* ------------------------------------------------------------------------ **
+ * Insert a new node into the list.
+ *
+ * Input: ListPtr - A pointer to the list into which the node is to
+ * be inserted.
+ * New - Pointer to the new node.
+ * After - NULL, or a pointer to a node that is already in the
+ * list.
+ * If NULL, then <New> will be added at the head of the
+ * list, else it will be added following <After>.
+ *
+ * Output: A pointer to the node that was inserted into the list (i.e.,
+ * the same as <New>).
+ *
+ * ------------------------------------------------------------------------ **
+ */
+ {
+ if( NULL == After )
+ {
+ New->Next = ListPtr->Head;
+ New->Prev = NULL;
+ if( NULL != ListPtr->Head )
+ ListPtr->Head->Prev = New;
+ else
+ ListPtr->Tail = New;
+ ListPtr->Head = New;
+ }
+ else
+ {
+ New->Next = After->Next;
+ New->Prev = After;
+ if( NULL != After->Next )
+ After->Next->Prev = New;
+ else
+ ListPtr->Tail = New;
+ After->Next = New;
+ }
+
+ ++(ListPtr->count);
+
+ return( New );
+ } /* ubi_dlInsert */
+
+ubi_dlNodePtr ubi_dlRemove( ubi_dlListPtr ListPtr, ubi_dlNodePtr Old )
+ /* ------------------------------------------------------------------------ **
+ * Remove a node from the list.
+ *
+ * Input: ListPtr - A pointer to the list from which <Old> is to be
+ * removed.
+ * Old - A pointer to the node that is to be removed from the
+ * list.
+ *
+ * Output: A pointer to the node that was removed (i.e., <Old>).
+ *
+ * ------------------------------------------------------------------------ **
+ */
+ {
+ if( NULL != Old )
+ {
+ if( Old->Next )
+ Old->Next->Prev = Old->Prev;
+ else
+ ListPtr->Tail = Old->Prev;
+
+ if( Old->Prev )
+ Old->Prev->Next = Old->Next;
+ else
+ ListPtr->Head = Old->Next;
+
+ --(ListPtr->count);
+ }
+
+ return( Old );
+ } /* ubi_dlRemove */
+
+
+/* ================================ The End ================================= */
diff --git a/source3/ubi_dLinkList.h b/source3/ubi_dLinkList.h
new file mode 100644
index 0000000000..1facf92d3b
--- /dev/null
+++ b/source3/ubi_dLinkList.h
@@ -0,0 +1,178 @@
+#ifndef ubi_dLinkList_H
+#define ubi_dLinkList_H
+/* ========================================================================== **
+ * ubi_dLinkList.h
+ *
+ * Copyright (C) 1997 by Christopher R. Hertel
+ *
+ * Email: crh@ubiqx.mn.org
+ * -------------------------------------------------------------------------- **
+ * This module implements simple doubly-linked lists.
+ * -------------------------------------------------------------------------- **
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * -------------------------------------------------------------------------- **
+ *
+ * Revision 0.3 1997/10/15 03:04:31 crh
+ * Added some handy type casting to the macros. Added AddHere and RemThis
+ * macros.
+ *
+ * Revision 0.2 1997/10/08 03:08:16 crh
+ * Fixed a few forgotten link-ups in Insert(), and fixed the AddHead()
+ * macro, which was passing the wrong value for <After> to Insert().
+ *
+ * Revision 0.1 1997/10/07 04:34:38 crh
+ * Initial Revision.
+ *
+ *
+ * ========================================================================== **
+ */
+
+#include <stdlib.h>
+
+
+/* ========================================================================== **
+ * Typedefs...
+ *
+ * ubi_dlNode - This is the basic node structure.
+ * ubi_dlNodePtr - Pointer to a node.
+ * ubi_dlList - This is the list header structure.
+ * ubi_dlListPtr - Pointer to a List (i.e., a list header structure).
+ *
+ */
+
+typedef struct ubi_dlListNode
+ {
+ struct ubi_dlListNode *Next;
+ struct ubi_dlListNode *Prev;
+ } ubi_dlNode;
+
+typedef ubi_dlNode *ubi_dlNodePtr;
+
+typedef struct
+ {
+ ubi_dlNodePtr Head;
+ ubi_dlNodePtr Tail;
+ unsigned long count;
+ } ubi_dlList;
+
+typedef ubi_dlList *ubi_dlListPtr;
+
+/* ========================================================================== **
+ * Macros...
+ *
+ * ubi_dlAddHead - Add a new node at the head of the list.
+ * ubi_dlAddTail - Add a new node at the tail of the list.
+ * ubi_dlAddHere - Add a node following the given node.
+ * ubi_dlRemHead - Remove the node at the head of the list, if any.
+ * ubi_dlRemTail - Remove the node at the tail of the list, if any.
+ * ubi_dlRemThis - Remove the indicated node.
+ * ubi_dlFirst - Return a pointer to the first node in the list, if any.
+ * ubi_dlLast - Return a pointer to the last node in the list, if any.
+ * ubi_dlNext - Given a node, return a pointer to the next node.
+ * ubi_dlPrev - Given a node, return a pointer to the previous node.
+ *
+ * Note that all of these provide type casting of the parameters. The
+ * Add and Rem macros are nothing more than nice front-ends to the
+ * Insert and Remove operations.
+ *
+ */
+
+#define ubi_dlAddHead( L, N ) \
+ ubi_dlInsert( (ubi_dlListPtr)(L), (ubi_dlNodePtr)(N), NULL )
+
+#define ubi_dlAddTail( L, N ) \
+ ubi_dlInsert( (ubi_dlListPtr)(L), \
+ (ubi_dlNodePtr)(N), \
+ (((ubi_dlListPtr)(L))->Tail) )
+
+#define ubi_dlAddHere( L, N, P ) \
+ ubi_dlInsert( (ubi_dlListPtr)(L), \
+ (ubi_dlNodePtr)(N), \
+ (ubi_dlNodePtr)(P) )
+
+#define ubi_dlRemHead( L ) ubi_dlRemove( (ubi_dlListPtr)(L), \
+ (((ubi_dlListPtr)(L))->Head) )
+
+#define ubi_dlRemTail( L ) ubi_dlRemove( (ubi_dlListPtr)(L), \
+ (((ubi_dlListPtr)(L))->Tail) )
+
+#define ubi_dlRemThis( L, N ) ubi_dlRemove( (ubi_dlListPtr)(L), \
+ (ubi_dlNodePtr)(N) )
+
+#define ubi_dlFirst( L ) (((ubi_dlListPtr)(L))->Head)
+
+#define ubi_dlLast( L ) (((ubi_dlListPtr)(L))->Tail)
+
+#define ubi_dlNext( N ) (((ubi_dlNodePtr)(N))->Next)
+
+#define ubi_dlPrev( N ) (((ubi_dlNodePtr)(N))->Prev)
+
+
+/* ========================================================================== **
+ * Function prototypes...
+ */
+
+ubi_dlListPtr ubi_dlInitList( ubi_dlListPtr ListPtr );
+ /* ------------------------------------------------------------------------ **
+ * Initialize a doubly-linked list header.
+ *
+ * Input: ListPtr - A pointer to the list structure that is to be
+ * initialized for use.
+ *
+ * Output: A pointer to the initialized list header (i.e., same as
+ * <ListPtr>).
+ *
+ * ------------------------------------------------------------------------ **
+ */
+
+ubi_dlNodePtr ubi_dlInsert( ubi_dlListPtr ListPtr,
+ ubi_dlNodePtr New,
+ ubi_dlNodePtr After );
+ /* ------------------------------------------------------------------------ **
+ * Insert a new node into the list.
+ *
+ * Input: ListPtr - A pointer to the list into which the node is to
+ * be inserted.
+ * New - Pointer to the new node.
+ * After - NULL, or a pointer to a node that is already in the
+ * list.
+ * If NULL, then <New> will be added at the head of the
+ * list, else it will be added following <After>.
+ *
+ * Output: A pointer to the node that was inserted into the list (i.e.,
+ * the same as <New>).
+ *
+ * ------------------------------------------------------------------------ **
+ */
+
+ubi_dlNodePtr ubi_dlRemove( ubi_dlListPtr ListPtr, ubi_dlNodePtr Old );
+ /* ------------------------------------------------------------------------ **
+ * Remove a node from the list.
+ *
+ * Input: ListPtr - A pointer to the list from which <Old> is to be
+ * removed.
+ * Old - A pointer to the node that is to be removed from the
+ * list.
+ *
+ * Output: A pointer to the node that was removed (i.e., <Old>).
+ *
+ * ------------------------------------------------------------------------ **
+ */
+
+
+/* ================================ The End ================================= */
+#endif /* ubi_dLinkList_H */
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