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Implement RtlInvertRangeList() and RtlMergeRangeList().

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svn path=/trunk/; revision=9484
This commit is contained in:
Eric Kohl 2004-05-24 12:03:24 +00:00
parent 8c86d7049f
commit 47f7ff67c1
1 changed files with 109 additions and 6 deletions
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115
reactos/lib/ntdll/rtl/rangelist.c
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: rangelist.c,v 1.6 2004/05/23 11:56:16 ekohl Exp $
/* $Id: rangelist.c,v 1.7 2004/05/24 12:03:24 ekohl Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS system libraries
@ -62,7 +62,7 @@ typedef struct _RTL_RANGE_ENTRY
* Status
*
* TODO:
* - Check for overlapping ranges.
* - Support shared ranges.
*
* @implemented
*/
@ -579,13 +579,80 @@ RtlInitializeRangeList (IN OUT PRTL_RANGE_LIST RangeList)
* RETURN VALUE
* Status
*
* @unimplemented
* @implemented
*/
NTSTATUS STDCALL
RtlInvertRangeList (OUT PRTL_RANGE_LIST InvertedRangeList,
IN PRTL_RANGE_LIST RangeList)
{
return STATUS_NOT_IMPLEMENTED;
PRTL_RANGE_ENTRY Previous;
PRTL_RANGE_ENTRY Current;
PLIST_ENTRY Entry;
NTSTATUS Status;
/* Don't invert an empty range list */
if (IsListEmpty(&RangeList->ListHead))
{
return STATUS_SUCCESS;
}
/* Add leading and intermediate ranges */
Previous = NULL;
Entry = RangeList->ListHead.Flink;
while (Entry != &RangeList->ListHead)
{
Current = CONTAINING_RECORD (Entry, RTL_RANGE_ENTRY, Entry);
if (Previous == NULL)
{
if (Current->Range.Start != (ULONGLONG)0)
{
Status = RtlAddRange (InvertedRangeList,
(ULONGLONG)0,
Current->Range.Start - 1,
0,
0,
NULL,
NULL);
if (!NT_SUCCESS(Status))
return Status;
}
}
else
{
if (Previous->Range.End + 1 != Current->Range.Start)
{
Status = RtlAddRange (InvertedRangeList,
Previous->Range.End + 1,
Current->Range.Start - 1,
0,
0,
NULL,
NULL);
if (!NT_SUCCESS(Status))
return Status;
}
}
Previous = Current;
Entry = Entry->Flink;
}
/* Add trailing range */
if (Previous->Range.End + 1 != (ULONGLONG)-1)
{
Status = RtlAddRange (InvertedRangeList,
Previous->Range.End + 1,
(ULONGLONG)-1,
0,
0,
NULL,
NULL);
if (!NT_SUCCESS(Status))
return Status;
}
return STATUS_SUCCESS;
}
@ -670,7 +737,7 @@ RtlIsRangeAvailable (IN PRTL_RANGE_LIST RangeList,
* RETURN VALUE
* Status
*
* @unimplemented
* @implemented
*/
NTSTATUS STDCALL
RtlMergeRangeLists (OUT PRTL_RANGE_LIST MergedRangeList,
@ -678,7 +745,43 @@ RtlMergeRangeLists (OUT PRTL_RANGE_LIST MergedRangeList,
IN PRTL_RANGE_LIST RangeList2,
IN ULONG Flags)
{
return STATUS_NOT_IMPLEMENTED;
RTL_RANGE_LIST_ITERATOR Iterator;
PRTL_RANGE Range;
NTSTATUS Status;
/* Copy range list 1 to the merged range list */
Status = RtlCopyRangeList (MergedRangeList,
RangeList1);
if (!NT_SUCCESS(Status))
return Status;
/* Add range list 2 entries to the merged range list */
Status = RtlGetFirstRange (RangeList2,
&Iterator,
&Range);
if (!NT_SUCCESS(Status))
return (Status == STATUS_NO_MORE_ENTRIES) ? STATUS_SUCCESS : Status;
while (TRUE)
{
Status = RtlAddRange (MergedRangeList,
Range->Start,
Range->End,
Range->Attributes,
Range->Flags | Flags,
Range->UserData,
Range->Owner);
if (!NT_SUCCESS(Status))
break;
Status = RtlGetNextRange (&Iterator,
&Range,
TRUE);
if (!NT_SUCCESS(Status))
break;
}
return (Status == STATUS_NO_MORE_ENTRIES) ? STATUS_SUCCESS : Status;
}
/* EOF */