reactos/base/setup/lib/utils/genlist.c

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/*
* PROJECT: ReactOS Setup Library
* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
* PURPOSE: Generic list functions
* COPYRIGHT: Copyright 2008-2018 Christoph von Wittich <christoph at reactos.org>
*/
/* INCLUDES *****************************************************************/
#include "precomp.h"
#include "genlist.h"
#define NDEBUG
#include <debug.h>
/* FUNCTIONS ****************************************************************/
PGENERIC_LIST
CreateGenericList(VOID)
{
PGENERIC_LIST List;
List = RtlAllocateHeap(ProcessHeap, 0, sizeof(GENERIC_LIST));
if (List == NULL)
return NULL;
InitializeListHead(&List->ListHead);
List->NumOfEntries = 0;
List->CurrentEntry = NULL;
return List;
}
VOID
DestroyGenericList(
IN OUT PGENERIC_LIST List,
IN BOOLEAN FreeData)
{
PGENERIC_LIST_ENTRY ListEntry;
PLIST_ENTRY Entry;
/* Release list entries */
while (!IsListEmpty(&List->ListHead))
{
Entry = RemoveHeadList(&List->ListHead);
ListEntry = CONTAINING_RECORD(Entry, GENERIC_LIST_ENTRY, Entry);
/* Release user data */
if (FreeData && ListEntry->Data != NULL)
RtlFreeHeap(ProcessHeap, 0, ListEntry->Data);
/* Release list entry */
RtlFreeHeap(ProcessHeap, 0, ListEntry);
}
/* Release list head */
RtlFreeHeap(ProcessHeap, 0, List);
}
BOOLEAN
AppendGenericListEntry(
IN OUT PGENERIC_LIST List,
IN PVOID Data,
IN BOOLEAN Current)
{
PGENERIC_LIST_ENTRY Entry;
Entry = RtlAllocateHeap(ProcessHeap, 0, sizeof(GENERIC_LIST_ENTRY));
if (Entry == NULL)
return FALSE;
Entry->List = List;
Entry->Data = Data;
Entry->UiData = 0;
InsertTailList(&List->ListHead, &Entry->Entry);
++List->NumOfEntries;
if (Current || List->CurrentEntry == NULL)
List->CurrentEntry = Entry;
return TRUE;
}
VOID
SetCurrentListEntry(
IN PGENERIC_LIST List,
IN PGENERIC_LIST_ENTRY Entry)
{
if (!Entry || (Entry->List != List))
return;
List->CurrentEntry = Entry;
}
PGENERIC_LIST_ENTRY
GetCurrentListEntry(
IN PGENERIC_LIST List)
{
return List->CurrentEntry;
}
PGENERIC_LIST_ENTRY
GetFirstListEntry(
IN PGENERIC_LIST List)
{
if (IsListEmpty(&List->ListHead))
return NULL;
return CONTAINING_RECORD(List->ListHead.Flink, GENERIC_LIST_ENTRY, Entry);
}
PGENERIC_LIST_ENTRY
GetNextListEntry(
IN PGENERIC_LIST_ENTRY Entry)
{
PLIST_ENTRY Next = Entry->Entry.Flink;
if (Next == &Entry->List->ListHead)
return NULL;
return CONTAINING_RECORD(Next, GENERIC_LIST_ENTRY, Entry);
}
PVOID
GetListEntryData(
IN PGENERIC_LIST_ENTRY Entry)
{
return Entry->Data;
}
ULONG_PTR
GetListEntryUiData(
IN PGENERIC_LIST_ENTRY Entry)
{
return Entry->UiData;
}
ULONG
GetNumberOfListEntries(
IN PGENERIC_LIST List)
{
return List->NumOfEntries;
}
/* EOF */