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CodeBlocksPortable/Borland/BCC55/Include/wlist.h

318 lines
9.8 KiB
C

//=============================================================================
// Microsoft (R) Bloodhound (tm). Copyright (C) 1991-1993.
//
// MODULE: list.h
//
// Modification History
//
// raypa 03/17/93 Created.
//=============================================================================
#if !defined(_LIST_)
#pragma option push -b -a8 -pc -A- /*P_O_Push*/
#define _LIST_
#pragma pack(1)
//=============================================================================
// The LINK structure is used to chain structures together into a list.
//=============================================================================
typedef struct _LINK *LPLINK;
typedef struct _LINK
{
LPLINK PrevLink; //... Previous or back pointer.
LPLINK NextLink; //... Next or forward pointer.
} LINK;
//=============================================================================
// The LIST data structure.
//=============================================================================
typedef struct _LIST
{
LPLINK Tail; //... List Tail pointer.
LPLINK Head; //... List Head pointer.
DWORD Length; //... List Length.
} LIST;
typedef LIST *LPLIST;
#ifndef NO_INLINE
#ifndef INLINE
#define INLINE __inline
#endif
//=============================================================================
// FUNCTIONS.
//=============================================================================
INLINE LPLINK WINAPI GetPrevLink(LPLINK Link)
{
return Link->PrevLink;
}
INLINE LPLINK WINAPI GetNextLink(LPLINK Link)
{
return Link->NextLink;
}
INLINE LPLINK WINAPI GetHeadOfList(LPLIST List)
{
return List->Head;
}
INLINE LPLINK WINAPI GetTailOfList(LPLIST List)
{
return List->Tail;
}
INLINE DWORD WINAPI GetListLength(LPLIST List)
{
return List->Length;
}
//=============================================================================
// FUNCTION: InitializeList()
//
// Modification History
//
// raypa 04/15/93 Created
//=============================================================================
INLINE LPLIST WINAPI InitializeList(LPLIST List)
{
List->Head = (LPLINK) 0L;
List->Tail = (LPLINK) 0L;
List->Length = 0;
return List;
}
//=============================================================================
// FUNCTION: AddLinkToLink()
//
// Modification History
//
// raypa 04/15/93 Created
//=============================================================================
INLINE VOID WINAPI AddLinkToLink(LPLINK DstLink, LPLINK SrcLink)
{
//=========================================================================
// Make the source link point at the destination link.
//=========================================================================
SrcLink->PrevLink = DstLink;
SrcLink->NextLink = DstLink->NextLink;
//=========================================================================
// Make the destination link point at the source link.
//=========================================================================
DstLink->NextLink->PrevLink = SrcLink;
DstLink->NextLink = SrcLink;
}
//=============================================================================
// FUNCTION: AddToList()
//
// Modification History
//
// raypa 04/15/93 Created
//=============================================================================
INLINE LPLINK WINAPI AddToList(LPLIST List, LPLINK DstLink, LPLINK SrcLink)
{
//=========================================================================
// Grow the list length by one.
//=========================================================================
List->Length++;
//=========================================================================
// If SrcLink is NULL then add DstLink to the end of the list.
//=========================================================================
if ( SrcLink == (LPLINK) 0L )
{
//=====================================================================
// If the tail pointer is NULL then the list is empty.
//=====================================================================
if ( List->Tail != (LPLINK) 0L )
{
AddLinkToLink(List->Tail, DstLink);
}
else
{
DstLink->PrevLink = DstLink;
DstLink->NextLink = DstLink;
List->Head = DstLink;
}
return (List->Tail = DstLink);
}
//=========================================================================
// If DstLink is NULL then add SrcLink to the front of the list.
//=========================================================================
if ( DstLink == (LPLINK) 0L )
{
//=====================================================================
// If the head pointer is NULL then the list is empty.
//=====================================================================
if ( List->Head != (LPLINK) 0L )
{
AddLinkToLink(List->Head, SrcLink);
}
else
{
SrcLink->PrevLink = SrcLink;
SrcLink->NextLink = SrcLink;
List->Tail = SrcLink;
}
return (List->Head = SrcLink);
}
//=========================================================================
// Neither DstLink nor SrcLink is NULL so link them together.
//=========================================================================
AddLinkToLink(DstLink, SrcLink);
return SrcLink;
}
//=============================================================================
// FUNCTION: DeleteFromList()
//
// Modification History
//
// raypa 04/15/93 Created
//=============================================================================
INLINE LPLINK WINAPI DeleteFromList(LPLIST List, LPLINK Link)
{
//=========================================================================
// If the list is empty then return NULL.
//=========================================================================
if ( List->Length != 0 )
{
//=====================================================================
// If the list length is not zero then we may need to fixup head and
// tail pointers in the event we delete the first or last link,
// respectively.
//=====================================================================
if ( --List->Length != 0 )
{
//=================================================================
// If we are deleting the front link then fixup the head pointer.
//=================================================================
if ( List->Head == Link )
{
List->Head = List->Head->NextLink;
}
//=================================================================
// If we are deleting the end link then fixup the tail pointer.
//=================================================================
if ( List->Tail == Link )
{
List->Tail = List->Tail->PrevLink;
}
//=================================================================
// Now we can unlink this link from the list.
//=================================================================
Link->NextLink->PrevLink = Link->PrevLink;
Link->PrevLink->NextLink = Link->NextLink;
}
else
{
//=================================================================
// There is only one link on the list and we just deleted it.
//=================================================================
List->Head = (LPLINK) 0L;
List->Tail = (LPLINK) 0L;
}
return Link;
}
return (LPLINK) 0L;
}
//=============================================================================
// FUNCTION: AddToFrontOfList()
//
// Modification History
//
// raypa 04/15/93 Created
//=============================================================================
INLINE LPLINK WINAPI AddToFrontOfList(LPLIST List, LPLINK Link)
{
return AddToList(List, (LPLINK) 0L, Link);
}
//=============================================================================
// FUNCTION: AddToEndOfList()
//
// Modification History
//
// raypa 04/15/93 Created
//=============================================================================
INLINE LPLINK WINAPI AddToEndOfList(LPLIST List, LPLINK Link)
{
return AddToList(List, Link, (LPLINK) 0L);
}
//=============================================================================
// FUNCTION: DeleteFromFrontOfList()
//
// Modification History
//
// raypa 04/15/93 Created
//=============================================================================
INLINE LPLINK WINAPI DeleteFromFrontOfList(LPLIST List)
{
return DeleteFromList(List, GetHeadOfList(List));
}
//=============================================================================
// FUNCTION: DeleteFromEndOfList()
//
// Modification History
//
// raypa 04/15/93 Created
//=============================================================================
INLINE LPLINK WINAPI DeleteFromEndOfList(LPLIST List)
{
return DeleteFromList(List, GetTailOfList(List));
}
#endif
#pragma pack()
#pragma option pop /*P_O_Pop*/
#endif