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/*++
Copyright (c) 1994 Microsoft Corporation
Copyright (c) 1993 Micro Computer Systems, Inc.
Module Name:
net\svcdlls\nwsap\server\sdmdsupp.c
Abstract:
This file contains support routines for SDMD.c
SDMD = Specialized Dynamic Memory Database
Author:
Brian Walker (MCS) 06-15-1993
Revision History:
--*/
#include "precomp.h"
#pragma hdrstop
/*++
*******************************************************************
S d m d I n i t i a l i z e L i s t H e a d
Routine Description:
This routine initializes a list structure that
is used to keep track of a list with. It sets the
fwd and back links to point at nothing.
Arguments:
ListIndex = Index of the list to initialize
Return Value:
Nothing
*******************************************************************
--*/
VOID
SdmdInitializeListHead(
INT ListIndex)
{
SdmdLists[ListIndex].Flink = SDMD_ENDOFLIST;
SdmdLists[ListIndex].Blink = SDMD_ENDOFLIST;
SdmdLists[ListIndex].ListIndex = ListIndex;
return;
}
/*++
*******************************************************************
S d m d R e m o v e H e a d L i s t
Routine Description:
This routine removes a record from the head of a list.
Arguments:
ListIndex = List number to get entry from
Return Value:
Ptr to SAP_RECORD structure of entry from head
(NULL = List is empty)
*******************************************************************
--*/
PSAP_RECORD
SdmdRemoveHeadList(
INT ListIndex)
{
PSAP_RECORD Entry;
PSAP_RECORD NextEntry;
/** Get ptr to the entry - if none - error **/
Entry = GETPTRFROMINDEX(SdmdLists[ListIndex].Flink);
if (Entry == NULL)
return NULL;
/** Take this entry out of the list **/
NextEntry = GETPTRFROMINDEX(Entry->Links[ListIndex].Flink);
if (NextEntry) {
NextEntry->Links[ListIndex].Blink = SDMD_ENDOFLIST;
SdmdLists[ListIndex].Flink = NextEntry->Index;
}
else {
SdmdLists[ListIndex].Flink = SDMD_ENDOFLIST;
SdmdLists[ListIndex].Blink = SDMD_ENDOFLIST;
}
/** Return the pointer **/
return Entry;
}
/*++
*******************************************************************
S d m d R e m o v e T a i l L i s t
Routine Description:
This routine removes a record from the tail of a list.
Arguments:
ListIndex = List number to get entry from
Return Value:
Ptr to SAP_RECORD structure of entry from tail
(NULL = List is empty)
*******************************************************************
--*/
#if 0 /* Current unused so we save the space */
PSAP_RECORD
SdmdRemoveTailList(
INT ListIndex)
{
PSAP_RECORD Entry;
PSAP_RECORD BackEntry;
/** Get ptr to the entry - if none - error **/
Entry = GETPTRFROMINDEX(SdmdLists[ListIndex].Blink);
if (Entry == NULL)
return NULL;
/** Take this entry out of the list **/
BackEntry = GETPTRFROMINDEX(Entry->Links[ListIndex].Blink);
if (BackEntry) {
BackEntry->Links[ListIndex].Flink = SDMD_ENDOFLIST;
SdmdLists[ListIndex].Blink = BackEntry->Index;
}
else {
SdmdLists[ListIndex].Flink = SDMD_ENDOFLIST;
SdmdLists[ListIndex].Blink = SDMD_ENDOFLIST;
}
/** Return the pointer **/
return Entry;
}
#endif
/*++
*******************************************************************
S d m d R e m o v e E n t r y L i s t
Routine Description:
This routine removes a specific entry from the given
list.
Arguments:
ListIndex = Index of the list to remove it from
Entry = Ptr to the entry to remove from the list.
Return Value:
Nothing
*******************************************************************
--*/
VOID
SdmdRemoveEntryList(
INT ListIndex,
PSAP_RECORD Entry)
{
PSAP_RECORD BackEntry;
PSAP_RECORD NextEntry;
/** Handle the forward link **/
NextEntry = GETPTRFROMINDEX(Entry->Links[ListIndex].Flink);
if (NextEntry)
NextEntry->Links[ListIndex].Blink = Entry->Links[ListIndex].Blink;
else
SdmdLists[ListIndex].Blink = Entry->Links[ListIndex].Blink;
/** Handle the back link **/
BackEntry = GETPTRFROMINDEX(Entry->Links[ListIndex].Blink);
if (BackEntry)
BackEntry->Links[ListIndex].Flink = Entry->Links[ListIndex].Flink;
else
SdmdLists[ListIndex].Flink = Entry->Links[ListIndex].Flink;
/** All Done **/
return;
}
/*++
*******************************************************************
S d m d I n s e r t T a i l L i s t
Routine Description:
Add an entry to the end of a list.
Arguments:
ListIndex = Index of the list to add this to.
Entry = Ptr to the entry to add
Return Value:
Nothing
*******************************************************************
--*/
VOID
SdmdInsertTailList(
INT ListIndex,
PSAP_RECORD Entry)
{
PSAP_RECORD TailEntry;
/** Get ptr to last record in list **/
TailEntry = GETPTRFROMINDEX(SdmdLists[ListIndex].Blink);
/**
If there is one - then point its forward link at my
new entry. If no entry - then point the list
head forward entry at my new entry.
**/
if (TailEntry)
TailEntry->Links[ListIndex].Flink = Entry->Index;
else
SdmdLists[ListIndex].Flink = Entry->Index;
/** Point new entries BACK LINK to current list tail **/
Entry->Links[ListIndex].Blink = SdmdLists[ListIndex].Blink;
/** Make my entry the new tail **/
SdmdLists[ListIndex].Blink = Entry->Index;
/** Make new entry have no forward link **/
Entry->Links[ListIndex].Flink = SDMD_ENDOFLIST;
/** All Done **/
return;
}
/*++
*******************************************************************
S d m d I n s e r t H e a d L i s t
Routine Description:
Add an entry to the head of a list.
Arguments:
ListIndex = Index of the list to add this to.
Entry = Ptr to the entry to add
Return Value:
Nothing
*******************************************************************
--*/
VOID
SdmdInsertHeadList(
INT ListIndex,
PSAP_RECORD Entry)
{
PSAP_RECORD HeadEntry;
/** Get ptr to first record in list **/
HeadEntry = GETPTRFROMINDEX(SdmdLists[ListIndex].Flink);
/**
If there is one - then point its back link at my
new entry. If no entry - then point the list
head back entry at my new entry.
**/
if (HeadEntry)
HeadEntry->Links[ListIndex].Blink = Entry->Index;
else
SdmdLists[ListIndex].Blink = Entry->Index;
/** Point new entries Front LINK to current list head **/
Entry->Links[ListIndex].Flink = SdmdLists[ListIndex].Flink;
/** Make my entry the new head **/
SdmdLists[ListIndex].Flink = Entry->Index;
/** Make new entry have no back link **/
Entry->Links[ListIndex].Blink = SDMD_ENDOFLIST;
/** All Done **/
return;
}
/*++
*******************************************************************
S d m d I n s e r t L i s t
Routine Description:
This routine inserts an entry into a list at some point
in the middle of a list.
Arguments:
ListIndex = Index of the list to add this to.
Entry = Ptr to the entry to add
AfterIndex = Index to put new entry after. -1 = At head
Return Value:
Nothing
*******************************************************************
--*/
VOID
SdmdInsertList(
INT ListIndex,
PSAP_RECORD Entry,
INT AfterIndex)
{
PSAP_RECORD NextEntry;
PSAP_RECORD BackEntry;
/** If head - do it **/
if (AfterIndex == SDMD_ENDOFLIST) {
SdmdInsertHeadList(ListIndex, Entry);
}
else {
/** Get ptr to entry that are inserting after **/
BackEntry = GETPTRFROMINDEX(AfterIndex);
/** Point new entry back at that entry **/
Entry->Links[ListIndex].Blink = AfterIndex;
/** Make new entry fwd ptr be back entry's fwd ptr **/
Entry->Links[ListIndex].Flink = BackEntry->Links[ListIndex].Flink;
/** Make back entry point fwd at new entry **/
BackEntry->Links[ListIndex].Flink = Entry->Index;
/** If we were at tail - make Entry the new tail **/
if (Entry->Links[ListIndex].Flink == SDMD_ENDOFLIST)
SdmdLists[ListIndex].Blink = Entry->Index;
else {
/** Make the entry after new one point back at us **/
NextEntry = GETPTRFROMINDEX(Entry->Links[ListIndex].Flink);
NextEntry->Links[ListIndex].Blink = Entry->Index;
}
}
/** All Done **/
return;
}
/*++
*******************************************************************
S d m d I n s e r t T a i l S u b L i s t
Routine Description:
Insert an entry at the tail of a sublist.
Arguments:
HeadEntry = Ptr to the entry that is the head of the sub list
ListIndex = List index that the list uses
Entry = Ptr to entry to insert
Return Value:
None.
*******************************************************************
--*/
VOID
SdmdInsertTailSubList(
PSAP_RECORD HeadEntry,
INT ListIndex,
PSAP_RECORD Entry)
{
PSAP_RECORD TailEntry;
/** Get ptr to last record in list **/
TailEntry = GETPTRFROMINDEX(HeadEntry->Links[ListIndex].Blink);
/**
If there is one - then point its forward link at my
new entry. If no entry - then point the list
head forward entry at my new entry.
**/
if (TailEntry)
TailEntry->Links[ListIndex].Flink = Entry->Index;
else
HeadEntry->Links[ListIndex].Flink = Entry->Index;
/** Point new entries BACK LINK to current list tail **/
Entry->Links[ListIndex].Blink = HeadEntry->Links[ListIndex].Blink;
/** Make my entry the new tail **/
HeadEntry->Links[ListIndex].Blink = Entry->Index;
/** Make new entry have no forward link **/
Entry->Links[ListIndex].Flink = SDMD_ENDOFLIST;
Entry->HeadIndex = HeadEntry->Index;
/** All Done **/
return;
}
/*++
*******************************************************************
S d m d R e m o v e T a i l S u b E n t r y L i s t
Routine Description:
Remove an entry from the tail of a sublist.
Arguments:
HeadEntry = Ptr to the head entry that has the list
ListIndex = The List index to get the entry from
Return Value:
Ptr to the entry removed.
(NULL = Empty List).
*******************************************************************
--*/
PSAP_RECORD
SdmdRemoveTailSubEntryList(
PSAP_RECORD HeadEntry,
INT ListIndex)
{
PSAP_RECORD Entry;
PSAP_RECORD BackEntry;
/** Get ptr to the entry - if none - error **/
Entry = GETPTRFROMINDEX(HeadEntry->Links[ListIndex].Blink);
if (Entry == NULL)
return NULL;
/** Take this entry out of the list **/
BackEntry = GETPTRFROMINDEX(Entry->Links[ListIndex].Blink);
if (BackEntry) {
BackEntry->Links[ListIndex].Flink = SDMD_ENDOFLIST;
HeadEntry->Links[ListIndex].Blink = BackEntry->Index;
}
else {
HeadEntry->Links[ListIndex].Flink = SDMD_ENDOFLIST;
HeadEntry->Links[ListIndex].Blink = SDMD_ENDOFLIST;
}
/** Return the pointer **/
return Entry;
}
/*++
*******************************************************************
S d m d R e m o v e S u b E n t r y L i s t
Routine Description:
This routine removes a specific entry from the given
list.
Arguments:
ListIndex = Index of the list to remove it from
Entry = Ptr to the entry to remove from the list.
Return Value:
Nothing
*******************************************************************
--*/
VOID
SdmdRemoveSubEntryList(
PSAP_RECORD HeadEntry,
INT ListIndex,
PSAP_RECORD Entry)
{
PSAP_RECORD BackEntry;
PSAP_RECORD NextEntry;
/** Handle the forward link **/
NextEntry = GETPTRFROMINDEX(Entry->Links[ListIndex].Flink);
if (NextEntry)
NextEntry->Links[ListIndex].Blink = Entry->Links[ListIndex].Blink;
else
HeadEntry->Links[ListIndex].Blink = Entry->Links[ListIndex].Blink;
/** Handle the back link **/
BackEntry = GETPTRFROMINDEX(Entry->Links[ListIndex].Blink);
if (BackEntry)
BackEntry->Links[ListIndex].Flink = Entry->Links[ListIndex].Flink;
else
HeadEntry->Links[ListIndex].Flink = Entry->Links[ListIndex].Flink;
/** All Done **/
return;
}
/*++
*******************************************************************
S d m d R e m o v e E n t r y F r o m H a s h
Routine Description:
This routine removes a specific entry from the given
hash entry.
Arguments:
ListHead = Ptr to the list head to remove from
Entry = Ptr to the entry to remove from the list.
Return Value:
Nothing
*******************************************************************
--*/
VOID
SdmdRemoveEntryFromHash(
PSDMD_LIST_ENTRY ListHead,
PSAP_RECORD Entry)
{
PSAP_RECORD BackEntry;
PSAP_RECORD NextEntry;
/** Handle the forward link **/
NextEntry = GETPTRFROMINDEX(Entry->Links[SAP_HASHLIST_INDEX].Flink);
if (NextEntry)
NextEntry->Links[SAP_HASHLIST_INDEX].Blink = Entry->Links[SAP_HASHLIST_INDEX].Blink;
else
ListHead->Blink = Entry->Links[SAP_HASHLIST_INDEX].Blink;
/** Handle the back link **/
BackEntry = GETPTRFROMINDEX(Entry->Links[SAP_HASHLIST_INDEX].Blink);
if (BackEntry)
BackEntry->Links[SAP_HASHLIST_INDEX].Flink = Entry->Links[SAP_HASHLIST_INDEX].Flink;
else
ListHead->Flink = Entry->Links[SAP_HASHLIST_INDEX].Flink;
/** All Done **/
return;
}
/*++
*******************************************************************
S d m d I n s e r t E n t r y I n H a s h
Routine Description:
This routine inserts an entry into a hash list.
Arguments:
ListHead = Ptr to list head to insert this entry in
Entry = Ptr to the entry to add
AfterIndex = Index to put new entry after. -1 = At head
Return Value:
Nothing
*******************************************************************
--*/
VOID
SdmdInsertEntryInHash(
PSDMD_LIST_ENTRY ListHead,
PSAP_RECORD Entry,
INT AfterIndex)
{
PSAP_RECORD NextEntry;
PSAP_RECORD BackEntry;
/** Set the hash index for this entry **/
Entry->HashIndex = ListHead->ListIndex;
/** Get ptr to entry that are inserting after **/
BackEntry = GETPTRFROMINDEX(AfterIndex);
/** If NULL - We are insertting at the head **/
if (BackEntry == NULL) {
/** Give this entry index of the old head **/
Entry->Links[SAP_HASHLIST_INDEX].Blink = SDMD_ENDOFLIST;
Entry->Links[SAP_HASHLIST_INDEX].Flink = ListHead->Flink;
/** Make this entry the head of the list **/
ListHead->Flink = Entry->Index;
}
else {
/** Point new entry back at that entry **/
Entry->Links[SAP_HASHLIST_INDEX].Blink = AfterIndex;
/** Make new entry fwd ptr be back entry's fwd ptr **/
Entry->Links[SAP_HASHLIST_INDEX].Flink = BackEntry->Links[SAP_HASHLIST_INDEX].Flink;
/** Make back entry point fwd at new entry **/
BackEntry->Links[SAP_HASHLIST_INDEX].Flink = Entry->Index;
}
/** If we were at tail - make Entry the new tail **/
NextEntry = GETPTRFROMINDEX(Entry->Links[SAP_HASHLIST_INDEX].Flink);
if (NextEntry == NULL) {
/** Make this the new tail **/
ListHead->Blink = Entry->Index;
}
else {
/** Make the entry after new one point back at us **/
NextEntry->Links[SAP_HASHLIST_INDEX].Blink = Entry->Index;
}
/** All Done **/
return;
}
|
