283 lines
11 KiB
C
283 lines
11 KiB
C
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/********************************************************************/
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/* STRIPE: converting a polygonal model to triangle strips
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Francine Evans, 1996.
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SUNY @ Stony Brook
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Advisors: Steven Skiena and Amitabh Varshney
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*/
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/********************************************************************/
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/*---------------------------------------------------------------------*/
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/* STRIPE:queue.h
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-----------------------------------------------------------------------*/
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#ifndef QUEUE_INCLUDED
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#define QUEUE_INCLUDED
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/* %%s Node */
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/*****************************************************************
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This structure is used to store the List linkage information of a
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ListInfo structure. It contains all the necessary information for the
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List functions to function properly. This structure must be the first
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one defined in any block of memory to be linked with the List functions.
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for an example of the used of The Node structure look in the files
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ipd2dms.c and ipd2man.h
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******************************************************************/
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#include <stdio.h>
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#define FALSE 0
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#define TRUE 1
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typedef struct
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{
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void *Next;
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void *Previous;
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}
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Node, * PNODE;
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/*****************************************************************
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Next : is a pointer to the next structure in this List.
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Previous : is a pointer to the previous structure in this List.
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priority : this is the priority of this structure in the List. The
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highest priority is 0. This field is only used by the
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functions EnQue and DeQue.
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******************************************************************/
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/* %%e */
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/* %%s ListInfo */
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/*****************************************************************
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This is the general means of linking application defined information into
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Lists and queues. All structures must begin with the Node Structure. All
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other data in the structure is user definable.
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******************************************************************/
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typedef struct List
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{
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Node ListNode; /* link to the next Listinfo Structure */
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/* user definable data */
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} ListInfo, *PLISTINFO;
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/*****************************************************************
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ListNode : this is the required node structure for the List
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mainpulation functions. This must be the first
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element of a user definable structure.
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In order for an application to use the List routines, it must define
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a structure with all the needed information. The first element in the
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user definable structure must be a Node structure. The Node structure
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contains all the necessary information for the List routines to do their
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magic. For an example of a user defined List structure see the file
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ipd2i.h. The User definable structure can be passed to any List function
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that excepts a pointer to a ListInfo structure.
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example:
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typedef mstruct
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{
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Node ListNode;
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int a,b,c,d,e,f,g;
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}
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mystruct;
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the user definable portion of the above structure is represented by
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the integers a,b,c,d,e,f,g. When passing this structure to a List
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function a cast of (ListInfo *) must be made to satisify the "C" complier.
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******************************************************************/
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/* %%e */
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/* %%s ListHead */
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/*****************************************************************
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ListHead is used as a header to a List. LHeaders[0] points to the
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head of the List. LHeaders[1] points the tail of the list. When
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accessing these variables use the defines LISTHEAD, LISTTAIL.
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******************************************************************/
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typedef struct LHead
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{
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PLISTINFO LHeaders[2];
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int NumList;
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}
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ListHead, *PLISTHEAD;
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/*****************************************************************
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LHeaders : this is an array of two pointers to ListInfo structures.
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This information is used to point to the head and tail of
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a list.
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NumList : this integer hold the number of structures linked into this
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list.
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ListHead #define:
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LISTHEAD : when Peeking down a list this specifies you should
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start at the Head of the list and search downward.
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LISTTAIL : when Peeking down a list this specifies you should
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start at the tail of the list and search foward.
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******************************************************************/
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#define LISTHEAD 0
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#define LISTTAIL 1
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/* %%e */
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typedef int BOOL;
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typedef void * PVOID;
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#define PEEKFROMHEAD( lh, ind ) ( PeekList( (lh), LISTHEAD, (ind) ) )
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#define PEEKFROMTAIL( lh, ind ) ( PeekList( (lh), LISTTAIL, (ind) ) )
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#define EMPTYLIST( lh ) ( ( (lh)->LHeaders[LISTHEAD] == NULL ) )
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/* General utility routines */
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/* %%s QueRoutines */
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BOOL InitList ( PLISTHEAD );
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/*****************************************************************
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InitList : Initialize a new list structure for use with the List
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routines
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INPUTS : LHead : a pointer to a ListHead structure.
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OUTPUT : a boolean value TRUE if no errors occured FALSE
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otherwise
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******************************************************************/
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PLISTINFO PeekList ( PLISTHEAD, int, int );
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/*****************************************************************
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PeekList : This funciton peeks down a list for the N'th element
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from the HEAD or TAIL of the list
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INPUTS : LHead : a pointer to a List head structure.
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from : can either search from the HEAD or TAIL
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of the list
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where : how many nodes from the begining should the
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List routines look.
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OUTPUT : a pointer to a ListInfo structure identified by
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from/where or NULL if an error occurred.
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******************************************************************/
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PLISTINFO RemoveList( PLISTHEAD LHead, PLISTINFO LInfo );
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/*****************************************************************
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RemoveList: Remove a ListInfo structure from a List.
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INPUTS : LHead : a pointer to a ListHead structure.
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LInfo : a pointer to the ListInfo structure to remove
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from the list.
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OUTPUT : a pointer to the ListInfo structure that was removed or
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NULL if an error occurred.
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******************************************************************/
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BOOL InsertNode( PLISTHEAD LHead, int nPos, PLISTINFO LInfo );
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/*****************************************************************
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InsertNode: add a node to a list after a given node
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INPUTS : LHead : a pointer to a ListHead structure.
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nPos : the position to insert the node into
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LInfo : a pointer to the new node to add to the list.
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OUTPUT: a boolean value TRUE if all goes well false otherwise
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*****************************************************************/
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BOOL AddHead ( PLISTHEAD, PLISTINFO );
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/*****************************************************************
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AddHead : add a ListInfo structure to the HEAD of a list.
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INPUTS : LHead : a pointer to a ListHead structure of the list
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to add to.
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LInfo : a pointer to the ListInfo structure to add to
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the list.
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OUTPUT : A boolean value TRUE if no errors occurred FALSE
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otherwise.
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******************************************************************/
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BOOL AddTail ( PLISTHEAD, PLISTINFO );
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/*****************************************************************
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AddTail : Add a ListInfo structure to the TAIL of a list.
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INPUTS : LHead : a pointer to a ListHead structure of the List
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to add to.
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LInfo : a pointer to the ListInfo structure to add to
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the List.
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OUTPUT : a boolean value TRUE if no errors occurred FALSE
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otherwise.
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******************************************************************/
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PLISTINFO RemTail ( PLISTHEAD );
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/*****************************************************************
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RemTail : Remove a ListInfo structure from the TAIL of a List.
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INPUTS : LHead : a pointer to a ListHead structure of the List
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to remove from.
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OUTPUT : a pointer to the ListInfo structure that was removed
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or NULL if an error occurred.
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******************************************************************/
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PLISTINFO RemHead ( PLISTHEAD );
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/*****************************************************************
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RemHead : Remove a ListInfo structure from the Head of a List.
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INPUTS : LHead : a pointer to a ListHead structure of the List
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to remove from.
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OUTPUT : a pointer to the ListInfo structure that was removed or
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NULL if an error occurred.
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******************************************************************/
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PLISTINFO SearchList(
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PLISTHEAD lpListHead,
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PVOID lpSKey,
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int ( * CompareCallBack) ( PVOID, PVOID ) );
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/*****************************************************************
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SearchList:
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Try to find a specific node in the queue whose key matches with
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searching key. Return the pointer to that node if found, return NULL
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otherwise
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Input:
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lpHashTbl => a far pointer to the hash table
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lpKey => a far poniter to searching key
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CompareCallBack => comparision function
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Output: a far pointer to the node to be found
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******************************************************************/
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#define NumOnList(lh) ( ((lh)->NumList) )
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/*****************************************************************
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NumOnList: Returns the number of Nodes linked to a ListHead
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structure. This number is maintained by the List
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routines.
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******************************************************************/
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#define GetNextNode(pli) ( ((pli)->ListNode.Next) )
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/********************************************************
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GetNextNode: This macro returns the Next Structure in this list.
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This macro will return NULL if no more structures are
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in the List.
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*********************************************************/
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#define GetPrevNode(pli) ( ((pli)->ListNode.Previous) )
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/********************************************************
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GetPrevNode: This macro returns the Previous Structure in this list.
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This macro will reutrn NULL if no more structures are
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in the List.
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********************************************************/
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/* %%e */
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#endif
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