mirror of
https://github.com/reactos/reactos.git
synced 2025-02-25 09:50:02 +00:00
Added more bitmap functions
Fixed some STDCALL issues svn path=/trunk/; revision=1035
This commit is contained in:
Eric Kohl
parent
a12836346f
commit
e2eb8c1697
6 changed files with 703 additions and 61 deletions
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@ -1,4 +1,4 @@
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/* $Id: rtl.h,v 1.28 2000/03/03 00:38:15 ekohl Exp $
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/* $Id: rtl.h,v 1.29 2000/03/08 01:52:52 ekohl Exp $
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*
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*/
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@ -262,6 +262,22 @@ RtlAppendUnicodeToString (
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PWSTR Source
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);
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BOOLEAN
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STDCALL
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RtlAreBitsClear (
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PRTL_BITMAP BitMapHeader,
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ULONG StartingIndex,
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ULONG Length
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);
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BOOLEAN
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STDCALL
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RtlAreBitsSet (
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PRTL_BITMAP BitMapHeader,
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ULONG StartingIndex,
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ULONG Length
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);
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NTSTATUS
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STDCALL
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RtlCharToInteger (
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@ -499,6 +515,66 @@ RtlFillMemoryUlong (
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ULONG Fill
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);
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ULONG
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STDCALL
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RtlFindClearBits (
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PRTL_BITMAP BitMapHeader,
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ULONG NumberToFind,
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ULONG HintIndex
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);
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ULONG
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STDCALL
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RtlFindClearBitsAndSet (
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PRTL_BITMAP BitMapHeader,
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ULONG NumberToFind,
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ULONG HintIndex
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);
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ULONG
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STDCALL
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RtlFindFirstRunClear (
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PRTL_BITMAP BitMapHeader,
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PULONG StartingIndex
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);
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ULONG
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STDCALL
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RtlFindFirstRunSet (
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PRTL_BITMAP BitMapHeader,
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PULONG StartingIndex
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);
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ULONG
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STDCALL
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RtlFindLongestRunClear (
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PRTL_BITMAP BitMapHeader,
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PULONG StartingIndex
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);
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ULONG
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STDCALL
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RtlFindLongestRunSet (
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PRTL_BITMAP BitMapHeader,
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PULONG StartingIndex
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);
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ULONG
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STDCALL
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RtlFindSetBits (
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PRTL_BITMAP BitMapHeader,
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ULONG NumberToFind,
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ULONG HintIndex
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);
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ULONG
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STDCALL
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RtlFindSetBitsAndClear (
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PRTL_BITMAP BitMapHeader,
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ULONG NumberToFind,
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ULONG HintIndex
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);
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VOID
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STDCALL
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RtlFreeAnsiString (
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@ -839,6 +915,18 @@ RtlNtStatusToPsxErrno (
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NTSTATUS StatusCode
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);
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ULONG
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STDCALL
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RtlNumberOfClearBits (
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PRTL_BITMAP BitMapHeader
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);
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ULONG
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STDCALL
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RtlNumberOfSetBits (
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PRTL_BITMAP BitMapHeader
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);
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ULONG
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STDCALL
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RtlOemStringToUnicodeSize (
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@ -914,6 +1002,14 @@ RtlSetAllBits (
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IN PRTL_BITMAP BitMapHeader
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);
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VOID
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STDCALL
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RtlSetBits (
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PRTL_BITMAP BitMapHeader,
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ULONG StartingIndex,
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ULONG NumberToSet
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);
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NTSTATUS
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STDCALL
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RtlSetDaclSecurityDescriptor (
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@ -931,15 +1027,6 @@ RtlSizeHeap (
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PVOID pmem
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);
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#if 0
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PWSTR
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RtlStrtok (
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PUNICODE_STRING _string,
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PWSTR _sep,
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PWSTR * temp
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);
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#endif
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VOID
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RtlStoreLong (
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PULONG Address,
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@ -29,7 +29,25 @@ typedef struct t_KeServiceDescriptorTableEntry {
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#pragma pack()
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/* --- NTOSKRNL.EXE --- */
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#if defined(__NTOSKRNL__)
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extern
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KE_SERVICE_DESCRIPTOR_TABLE_ENTRY
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KeServiceDescriptorTable[SSDT_MAX_ENTRIES] __declspec(dllexport);
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#else
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extern
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KE_SERVICE_DESCRIPTOR_TABLE_ENTRY
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KeServiceDescriptorTable[SSDT_MAX_ENTRIES] __declspec(dllimport);
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#endif
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extern
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KE_SERVICE_DESCRIPTOR_TABLE_ENTRY
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KeServiceDescriptorTableShadow[SSDT_MAX_ENTRIES];
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BOOLEAN
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STDCALL
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KeAddSystemServiceTable (
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PSSDT SSDT,
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PULONG ServiceCounterTable,
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@ -1,4 +1,4 @@
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/* $Id: usercall.c,v 1.9 2000/02/25 00:33:30 ekohl Exp $
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/* $Id: usercall.c,v 1.10 2000/03/08 01:53:59 ekohl Exp $
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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@ -22,9 +22,6 @@
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#include <ddk/defines.h>
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extern KE_SERVICE_DESCRIPTOR_TABLE_ENTRY KeServiceDescriptorTable[];
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extern KE_SERVICE_DESCRIPTOR_TABLE_ENTRY KeServiceDescriptorTableShadow[];
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#define _STR(x) #x
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#define STR(x) _STR(x)
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@ -92,6 +89,7 @@ ULONG KiAfterSystemCallHook(ULONG NtStatus, PCONTEXT Context)
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// TableIndex is 0 based
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// ServiceCountTable its not used at the moment
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BOOLEAN
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STDCALL
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KeAddSystemServiceTable (
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PSSDT SSDT,
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PULONG ServiceCounterTable,
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@ -285,3 +283,5 @@ void interrupt_handler2e(void);
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"popl %ebp\n\t" /* Ebp */
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"iret\n\t");
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/* EOF */
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@ -1,4 +1,4 @@
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; $Id: ntoskrnl.def,v 1.53 2000/03/06 01:02:30 ea Exp $
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; $Id: ntoskrnl.def,v 1.54 2000/03/08 01:55:34 ekohl Exp $
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;
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; reactos/ntoskrnl/ntoskrnl.def
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;
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@ -187,7 +187,7 @@ IofCompleteRequest@8
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KdDebuggerEnabled DATA
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KdDebuggerNotPresent DATA
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KdPollBreakIn@0
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KeAddSystemServiceTable
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KeAddSystemServiceTable@20
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KeBugCheck
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KeBugCheckEx
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KeClearEvent
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@ -203,17 +203,18 @@ KeInsertQueueDpc
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KeQuerySystemTime
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KeReadStateEvent
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KeResetEvent
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KeServiceDescriptorTable DATA
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KeSetEvent
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KeSetTimer
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KeSynchronizeExecution
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KeWaitForSingleObject
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MmGetSystemAddressForMdl
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MmMapIoSpace
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NlsAnsiCodePage DATA
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NlsLeadByteInfo DATA
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NlsMbCodePageTag DATA
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NlsMbOemCodePageTag DATA
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NlsOemLeadByteInfo DATA
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NlsAnsiCodePage DATA
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NlsLeadByteInfo DATA
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NlsMbCodePageTag DATA
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NlsMbOemCodePageTag DATA
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NlsOemLeadByteInfo DATA
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NtAddAtom@8
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NtAdjustPrivilegesToken@24
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NtAllocateLocallyUniqueId@4
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@ -287,8 +288,8 @@ RtlAppendUnicodeStringToString@8
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RtlAppendUnicodeToString@8
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;RtlAreAllAccessesGranted
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;RtlAreAnyAccessesGranted
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;RtlAreBitsClear
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;RtlAreBitsSet
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RtlAreBitsClear@12
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RtlAreBitsSet@12
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;RtlAssert
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;RtlCaptureStackBackTrace
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RtlCharToInteger@12
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@ -342,15 +343,15 @@ RtlExtendedLargeIntegerDivide@16
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RtlExtendedMagicDivide@20
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RtlFillMemory@12
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RtlFillMemoryUlong@12
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;RtlFindClearBits
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;RtlFindClearBitsAndSet
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;RtlFindFirstRunClear
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;RtlFindFirstRunSet
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;RtlFindLongestRunClear
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;RtlFindLongestRunSet
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RtlFindClearBits@12
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RtlFindClearBitsAndSet@12
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RtlFindFirstRunClear@8
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RtlFindFirstRunSet@8
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RtlFindLongestRunClear@8
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RtlFindLongestRunSet@8
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;RtlFindMessage
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;RtlFindSetBits
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;RtlFindSetBitsAndClear
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RtlFindSetBits@12
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RtlFindSetBitsAndClear@12
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;RtlFindUnicodePrefix
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;RtlFormatCurrentUserKeyPath
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RtlFreeAnsiString@4
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@ -399,8 +400,8 @@ RtlMultiByteToUnicodeSize@12
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;RtlNtStatusToDosError
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;RtlNtStatusToDosErrorNoTeb
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;RtlNumberGenericTableElements
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;RtlNumberOfClearBits
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;RtlNumberOfSetBits
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RtlNumberOfClearBits@4
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RtlNumberOfSetBits@4
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RtlOemStringToCountedUnicodeString@12
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RtlOemStringToUnicodeSize@4
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RtlOemStringToUnicodeString@12
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@ -721,4 +722,3 @@ WRITE_PORT_ULONG@8
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WRITE_PORT_USHORT@8
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InsertTailList
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RemoveEntryList
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_KeServiceDescriptorTable DATA
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@ -1,4 +1,4 @@
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; $Id: ntoskrnl.edf,v 1.40 2000/03/06 01:02:30 ea Exp $
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; $Id: ntoskrnl.edf,v 1.41 2000/03/08 01:55:34 ekohl Exp $
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;
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; reactos/ntoskrnl/ntoskrnl.def
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;
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@ -187,7 +187,7 @@ IofCompleteRequest=IofCompleteRequest@8
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KdDebuggerEnabled DATA
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KdDebuggerNotPresent DATA
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KdPollBreakIn=KdPollBreakIn@0
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KeAddSystemServiceTable
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KeAddSystemServiceTable=KeAddSystemServiceTable@20
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KeBugCheck
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KeBugCheckEx
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KeClearEvent
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@ -203,17 +203,18 @@ KeInsertQueueDpc
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KeQuerySystemTime
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KeReadStateEvent
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KeResetEvent
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KeServiceDescriptorTable DATA
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KeSetEvent
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KeSetTimer
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KeSynchronizeExecution
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KeWaitForSingleObject
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MmGetSystemAddressForMdl
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MmMapIoSpace
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NlsAnsiCodePage DATA
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NlsLeadByteInfo DATA
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NlsMbCodePageTag DATA
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NlsMbOemCodePageTag DATA
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NlsOemLeadByteInfo DATA
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NlsAnsiCodePage DATA
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NlsLeadByteInfo DATA
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NlsMbCodePageTag DATA
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NlsMbOemCodePageTag DATA
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NlsOemLeadByteInfo DATA
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NtAddAtom=NtAddAtom@8
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NtAdjustPrivilegesToken=NtAdjustPrivilegesToken@24
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NtAllocateLocallyUniqueId=NtAllocateLocallyUniqueId@4
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@ -280,6 +281,8 @@ RtlAppendAsciizToString=RtlAppendAsciizToString@8
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RtlAppendStringToString=RtlAppendStringToString@8
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RtlAppendUnicodeStringToString=RtlAppendUnicodeStringToString@8
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RtlAppendUnicodeToString=RtlAppendUnicodeToString@8
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RtlAreBitsClear=RtlAreBitsClear@12
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RtlAreBitsSet=RtlAreBitsSet@12
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RtlCharToInteger=RtlCharToInteger@12
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RtlClearAllBits=RtlClearAllBits@4
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RtlClearBits=RtlClearBits@12
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@ -308,6 +311,14 @@ RtlExtendedLargeIntegerDivide=RtlExtendedLargeIntegerDivide@16
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RtlExtendedMagicDivide=RtlExtendedMagicDivide@20
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RtlFillMemory=RtlFillMemory@12
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RtlFillMemoryUlong=RtlFillMemoryUlong@12
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RtlFindClearBits=RtlFindClearBits@12
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RtlFindClearBitsAndSet=RtlFindClearBitsAndSet@12
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RtlFindFirstRunClear=RtlFindFirstRunClear@8
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RtlFindFirstRunSet=RtlFindFirstRunSet@8
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RtlFindLongestRunClear=RtlFindLongestRunClear@8
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RtlFindLongestRunSet=RtlFindLongestRunSet@8
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RtlFindSetBits=RtlFindSetBits@12
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RtlFindSetBitsAndClear=RtlFindSetBitsAndClear@12
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RtlFreeAnsiString=RtlFreeAnsiString@4
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RtlFreeOemString=RtlFreeOemString@4
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RtlFreeUnicodeString=RtlFreeUnicodeString@4
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@ -335,6 +346,8 @@ RtlLengthSid=RtlLengthSid@4
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RtlMoveMemory=RtlMoveMemory@12
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RtlMultiByteToUnicodeN=RtlMultiByteToUnicodeN@20
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RtlMultiByteToUnicodeSize=RtlMultiByteToUnicodeSize@12
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RtlNumberOfClearBits=RtlNumberOfClearBits@4
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RtlNumberOfSetBits=RtlNumberOfSetBits@4
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RtlOemStringToCountedUnicodeString=RtlOemStringToCountedUnicodeString@12
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RtlOemStringToUnicodeSize=RtlOemStringToUnicodeSize@4
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RtlOemStringToUnicodeString=RtlOemStringToUnicodeString@12
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|
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@ -1,4 +1,4 @@
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/* $Id: bitmap.c,v 1.1 2000/03/03 00:48:50 ekohl Exp $
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/* $Id: bitmap.c,v 1.2 2000/03/08 01:54:34 ekohl Exp $
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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@ -27,6 +27,84 @@ RtlInitializeBitMap (
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}
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BOOLEAN
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STDCALL
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RtlAreBitsClear (
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PRTL_BITMAP BitMapHeader,
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ULONG StartingIndex,
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ULONG Length
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)
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{
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ULONG Size = BitMapHeader->SizeOfBitMap;
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ULONG Shift;
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ULONG Count;
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PCHAR Ptr;
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if (StartingIndex >= Size ||
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!Length ||
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(StartingIndex + Length > Size))
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return FALSE;
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Ptr = (PCHAR)BitMapHeader->Buffer + (StartingIndex / 8);
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while (Length)
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{
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/* get bit shift in current byte */
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Shift = StartingIndex & 7;
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/* get number of bits to check in current byte */
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Count = (Length > 8 - Shift) ? 8 - Shift : Length;
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/* check byte */
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if (*Ptr++ & (~(0xFF << Count) << Shift))
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return FALSE;
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Length -= Count;
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StartingIndex += Count;
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}
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return TRUE;
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}
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|
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BOOLEAN
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STDCALL
|
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RtlAreBitsSet (
|
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PRTL_BITMAP BitMapHeader,
|
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ULONG StartingIndex,
|
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ULONG Length
|
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)
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{
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ULONG Size = BitMapHeader->SizeOfBitMap;
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ULONG Shift;
|
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ULONG Count;
|
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PCHAR Ptr;
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|
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if (StartingIndex >= Size ||
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!Length ||
|
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(StartingIndex + Length > Size))
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return FALSE;
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|
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Ptr = (PCHAR)BitMapHeader->Buffer + (StartingIndex / 8);
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while (Length)
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{
|
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/* get bit shift in current byte */
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Shift = StartingIndex & 7;
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|
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/* get number of bits to check in current byte */
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Count = (Length > 8 - Shift) ? 8 - Shift : Length;
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|
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/* check byte */
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if (~*Ptr++ & (~(0xFF << Count) << Shift))
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return FALSE;
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Length -= Count;
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StartingIndex += Count;
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}
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return TRUE;
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}
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|
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VOID
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STDCALL
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RtlClearAllBits (
|
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|
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@ -48,9 +126,9 @@ RtlClearBits (
|
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)
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{
|
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ULONG Size = BitMapHeader->SizeOfBitMap;
|
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ULONG n;
|
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ULONG shift;
|
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PCHAR p;
|
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ULONG Count;
|
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ULONG Shift;
|
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PCHAR Ptr;
|
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|
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if (StartingIndex >= Size || NumberToClear == 0)
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return;
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|
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@ -58,23 +136,469 @@ RtlClearBits (
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if (StartingIndex + NumberToClear > Size)
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NumberToClear = Size - StartingIndex;
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p = (PCHAR)(BitMapHeader->Buffer + (StartingIndex / 8));
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Ptr = (PCHAR)(BitMapHeader->Buffer + (StartingIndex / 8));
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while (NumberToClear)
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{
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/* bit shift in current byte */
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shift = StartingIndex & 7;
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Shift = StartingIndex & 7;
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/* number of bits to change in current byte */
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n = (NumberToClear > 8 - shift ) ? 8 - shift : NumberToClear;
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Count = (NumberToClear > 8 - Shift ) ? 8 - Shift : NumberToClear;
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/* adjust byte */
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*p++ &= ~(~(0xFF << n) << shift);
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NumberToClear -= n;
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StartingIndex += n;
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*Ptr++ &= ~(~(0xFF << Count) << Shift);
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NumberToClear -= Count;
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StartingIndex += Count;
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}
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}
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ULONG
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STDCALL
|
||||
RtlFindClearBits (
|
||||
PRTL_BITMAP BitMapHeader,
|
||||
ULONG NumberToFind,
|
||||
ULONG HintIndex
|
||||
)
|
||||
{
|
||||
ULONG Size = BitMapHeader->SizeOfBitMap;
|
||||
ULONG Index;
|
||||
ULONG Count;
|
||||
PCHAR Ptr;
|
||||
CHAR Mask;
|
||||
|
||||
if (NumberToFind > Size || NumberToFind == 0)
|
||||
return -1;
|
||||
|
||||
if (HintIndex >= Size)
|
||||
HintIndex = 0;
|
||||
|
||||
Index = HintIndex;
|
||||
Ptr = (PCHAR)BitMapHeader->Buffer + (Index / 8);
|
||||
Mask = 1 << (Index & 7);
|
||||
|
||||
while (HintIndex < Size)
|
||||
{
|
||||
/* count clear bits */
|
||||
for (Count = 0; Index < Size && ~*Ptr & Mask; Index++)
|
||||
{
|
||||
if (++Count >= NumberToFind)
|
||||
return HintIndex;
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
/* skip set bits */
|
||||
for (; Index < Size && *Ptr & Mask; Index++)
|
||||
{
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
HintIndex = Index;
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
ULONG
|
||||
STDCALL
|
||||
RtlFindClearBitsAndSet (
|
||||
PRTL_BITMAP BitMapHeader,
|
||||
ULONG NumberToFind,
|
||||
ULONG HintIndex
|
||||
)
|
||||
{
|
||||
ULONG Index;
|
||||
|
||||
Index = RtlFindClearBits (BitMapHeader,
|
||||
NumberToFind,
|
||||
HintIndex);
|
||||
if (Index != (ULONG)-1)
|
||||
RtlSetBits (BitMapHeader,
|
||||
Index,
|
||||
NumberToFind);
|
||||
|
||||
return Index;
|
||||
}
|
||||
|
||||
|
||||
ULONG
|
||||
STDCALL
|
||||
RtlFindFirstRunClear (
|
||||
PRTL_BITMAP BitMapHeader,
|
||||
PULONG StartingIndex
|
||||
)
|
||||
{
|
||||
ULONG Size = BitMapHeader->SizeOfBitMap;
|
||||
ULONG Index;
|
||||
ULONG Count;
|
||||
PCHAR Ptr;
|
||||
CHAR Mask;
|
||||
|
||||
if (*StartingIndex > Size)
|
||||
{
|
||||
*StartingIndex = (ULONG)-1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
Index = *StartingIndex;
|
||||
Ptr = (PCHAR)BitMapHeader->Buffer + (Index / 8);
|
||||
Mask = 1 << (Index & 7);
|
||||
|
||||
/* skip set bits */
|
||||
for (; Index < Size && *Ptr & Mask; Index++)
|
||||
{
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
/* return index of first clear bit */
|
||||
if (Index >= Size)
|
||||
{
|
||||
*StartingIndex = (ULONG)-1;
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
*StartingIndex = Index;
|
||||
|
||||
/* count clear bits */
|
||||
for (Count = 0; Index < Size && ~*Ptr & Mask; Index++)
|
||||
{
|
||||
Count++;
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
return Count;
|
||||
}
|
||||
|
||||
|
||||
ULONG
|
||||
STDCALL
|
||||
RtlFindFirstRunSet (
|
||||
PRTL_BITMAP BitMapHeader,
|
||||
PULONG StartingIndex
|
||||
)
|
||||
{
|
||||
ULONG Size = BitMapHeader->SizeOfBitMap;
|
||||
ULONG Index;
|
||||
ULONG Count;
|
||||
PCHAR Ptr;
|
||||
CHAR Mask;
|
||||
|
||||
if (*StartingIndex > Size)
|
||||
{
|
||||
*StartingIndex = (ULONG)-1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
Index = *StartingIndex;
|
||||
Ptr = (PCHAR)BitMapHeader->Buffer + (Index / 8);
|
||||
Mask = 1 << (Index & 7);
|
||||
|
||||
/* skip clear bits */
|
||||
for (; Index < Size && ~*Ptr & Mask; Index++)
|
||||
{
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
/* return index of first set bit */
|
||||
if (Index >= Size)
|
||||
{
|
||||
*StartingIndex = (ULONG)-1;
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
*StartingIndex = Index;
|
||||
|
||||
/* count set bits */
|
||||
for (Count = 0; Index < Size && *Ptr & Mask; Index++)
|
||||
{
|
||||
Count++;
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
return Count;
|
||||
}
|
||||
|
||||
|
||||
ULONG
|
||||
STDCALL
|
||||
RtlFindLongestRunClear (
|
||||
PRTL_BITMAP BitMapHeader,
|
||||
PULONG StartingIndex
|
||||
)
|
||||
{
|
||||
ULONG Size = BitMapHeader->SizeOfBitMap;
|
||||
PCHAR Ptr = (PCHAR)BitMapHeader->Buffer;
|
||||
ULONG Index = 0;
|
||||
ULONG Count;
|
||||
ULONG Max = 0;
|
||||
ULONG Start;
|
||||
ULONG Maxstart = 0;
|
||||
CHAR Mask = 1;
|
||||
|
||||
while (Index < Size)
|
||||
{
|
||||
Start = Index;
|
||||
|
||||
/* count clear bits */
|
||||
for (Count = 0; Index < Size && ~*Ptr & Mask; Index++)
|
||||
{
|
||||
Count++;
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
/* skip set bits */
|
||||
for (; Index < Size && *Ptr & Mask; Index++)
|
||||
{
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
if (Count > Max)
|
||||
{
|
||||
Max = Count;
|
||||
Maxstart = Start;
|
||||
}
|
||||
}
|
||||
|
||||
if (StartingIndex)
|
||||
*StartingIndex = Maxstart;
|
||||
|
||||
return Max;
|
||||
}
|
||||
|
||||
|
||||
ULONG
|
||||
STDCALL
|
||||
RtlFindLongestRunSet (
|
||||
PRTL_BITMAP BitMapHeader,
|
||||
PULONG StartingIndex
|
||||
)
|
||||
{
|
||||
ULONG Size = BitMapHeader->SizeOfBitMap;
|
||||
PCHAR Ptr = (PCHAR)BitMapHeader->Buffer;
|
||||
ULONG Index = 0;
|
||||
ULONG Count;
|
||||
ULONG Max = 0;
|
||||
ULONG Start;
|
||||
ULONG Maxstart = 0;
|
||||
CHAR Mask = 1;
|
||||
|
||||
while (Index < Size)
|
||||
{
|
||||
Start = Index;
|
||||
|
||||
/* count set bits */
|
||||
for (Count = 0; Index < Size && *Ptr & Mask; Index++)
|
||||
{
|
||||
Count++;
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
/* skip clear bits */
|
||||
for (; Index < Size && ~*Ptr & Mask; Index++)
|
||||
{
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
if (Count > Max)
|
||||
{
|
||||
Max = Count;
|
||||
Maxstart = Start;
|
||||
}
|
||||
}
|
||||
|
||||
if (StartingIndex)
|
||||
*StartingIndex = Maxstart;
|
||||
|
||||
return Max;
|
||||
}
|
||||
|
||||
|
||||
ULONG
|
||||
STDCALL
|
||||
RtlFindSetBits (
|
||||
PRTL_BITMAP BitMapHeader,
|
||||
ULONG NumberToFind,
|
||||
ULONG HintIndex
|
||||
)
|
||||
{
|
||||
ULONG Size = BitMapHeader->SizeOfBitMap;
|
||||
ULONG Index;
|
||||
ULONG Count;
|
||||
PCHAR Ptr;
|
||||
CHAR Mask;
|
||||
|
||||
if (NumberToFind > Size || NumberToFind == 0)
|
||||
return (ULONG)-1;
|
||||
|
||||
if (HintIndex >= Size)
|
||||
HintIndex = 0;
|
||||
|
||||
Index = HintIndex;
|
||||
Ptr = (PCHAR)BitMapHeader->Buffer + (Index / 8);
|
||||
Mask = 1 << (Index & 7);
|
||||
|
||||
while (HintIndex < Size)
|
||||
{
|
||||
/* count set bits */
|
||||
for (Count = 0; Index < Size && *Ptr & Mask; Index++)
|
||||
{
|
||||
if (++Count >= NumberToFind)
|
||||
return HintIndex;
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
/* skip clear bits */
|
||||
for (; Index < Size && ~*Ptr & Mask; Index++)
|
||||
{
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
HintIndex = Index;
|
||||
}
|
||||
|
||||
return (ULONG)-1;
|
||||
}
|
||||
|
||||
|
||||
ULONG
|
||||
STDCALL
|
||||
RtlFindSetBitsAndClear (
|
||||
PRTL_BITMAP BitMapHeader,
|
||||
ULONG NumberToFind,
|
||||
ULONG HintIndex
|
||||
)
|
||||
{
|
||||
ULONG Index;
|
||||
|
||||
Index = RtlFindSetBits (BitMapHeader,
|
||||
NumberToFind,
|
||||
HintIndex);
|
||||
if (Index != (ULONG)-1)
|
||||
RtlClearBits (BitMapHeader,
|
||||
Index,
|
||||
NumberToFind);
|
||||
|
||||
return Index;
|
||||
}
|
||||
|
||||
|
||||
ULONG
|
||||
STDCALL
|
||||
RtlNumberOfClearBits (
|
||||
PRTL_BITMAP BitMapHeader
|
||||
)
|
||||
{
|
||||
PCHAR Ptr = (PCHAR)BitMapHeader->Buffer;
|
||||
ULONG Size = BitMapHeader->SizeOfBitMap;
|
||||
ULONG Index;
|
||||
ULONG Count;
|
||||
CHAR Mask;
|
||||
|
||||
for (Mask = 1, Index = 0, Count = 0; Index < Size; Index++)
|
||||
{
|
||||
if (~*Ptr & Mask)
|
||||
Count++;
|
||||
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
return Count;
|
||||
}
|
||||
|
||||
|
||||
ULONG
|
||||
STDCALL
|
||||
RtlNumberOfSetBits (
|
||||
PRTL_BITMAP BitMapHeader
|
||||
)
|
||||
{
|
||||
PCHAR Ptr = (PCHAR)BitMapHeader->Buffer;
|
||||
ULONG Size = BitMapHeader->SizeOfBitMap;
|
||||
ULONG Index;
|
||||
ULONG Count;
|
||||
CHAR Mask;
|
||||
|
||||
for (Mask = 1, Index = 0, Count = 0; Index < Size; Index++)
|
||||
{
|
||||
if (*Ptr & Mask)
|
||||
Count++;
|
||||
|
||||
Mask <<= 1;
|
||||
if (Mask == 0)
|
||||
{
|
||||
Mask = 1;
|
||||
Ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
return Count;
|
||||
}
|
||||
|
||||
|
||||
VOID
|
||||
STDCALL
|
||||
RtlSetAllBits (
|
||||
|
|
@ -86,6 +610,7 @@ RtlSetAllBits (
|
|||
ALIGN(BitMapHeader->SizeOfBitMap, 8));
|
||||
}
|
||||
|
||||
|
||||
VOID
|
||||
STDCALL
|
||||
RtlSetBits (
|
||||
|
|
@ -95,9 +620,9 @@ RtlSetBits (
|
|||
)
|
||||
{
|
||||
ULONG Size = BitMapHeader->SizeOfBitMap;
|
||||
ULONG n;
|
||||
ULONG shift;
|
||||
PCHAR p;
|
||||
ULONG Count;
|
||||
ULONG Shift;
|
||||
PCHAR Ptr;
|
||||
|
||||
if (StartingIndex >= Size || NumberToSet == 0)
|
||||
return;
|
||||
|
|
@ -105,21 +630,20 @@ RtlSetBits (
|
|||
if (StartingIndex + NumberToSet > Size)
|
||||
NumberToSet = Size - StartingIndex;
|
||||
|
||||
p = (PCHAR)BitMapHeader->Buffer + (StartingIndex / 8);
|
||||
Ptr = (PCHAR)BitMapHeader->Buffer + (StartingIndex / 8);
|
||||
while (NumberToSet)
|
||||
{
|
||||
/* bit shift in current byte */
|
||||
shift = StartingIndex & 7;
|
||||
Shift = StartingIndex & 7;
|
||||
|
||||
/* number of bits to change in current byte */
|
||||
n = (NumberToSet > 8 - shift) ? 8 - shift : NumberToSet;
|
||||
Count = (NumberToSet > 8 - Shift) ? 8 - Shift : NumberToSet;
|
||||
|
||||
/* adjust byte */
|
||||
*p++ |= ~( 0xFF << n ) << shift;
|
||||
NumberToSet -= n;
|
||||
StartingIndex += n;
|
||||
*Ptr++ |= ~(0xFF << Count) << Shift;
|
||||
NumberToSet -= Count;
|
||||
StartingIndex += Count;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* EOF */
|
||||
|
|
|
|||
Loading…
Reference in a new issue