mirror of
https://github.com/reactos/reactos.git
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162 lines
2.9 KiB
C
162 lines
2.9 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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* FILE: lib/rtl/mem.c
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* PURPOSE: Memory functions
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* PROGRAMMER: David Welch (welch@mcmail.com)
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*/
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/* INCLUDES *****************************************************************/
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#include <rtl.h>
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS *****************************************************************/
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/******************************************************************************
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* RtlCompareMemory [NTDLL.@]
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*
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* Compare one block of memory with another
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*
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* PARAMS
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* Source1 [I] Source block
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* Source2 [I] Block to compare to Source1
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* Length [I] Number of bytes to fill
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*
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* RETURNS
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* The length of the first byte at which Source1 and Source2 differ, or Length
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* if they are the same.
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*
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* @implemented
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*/
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SIZE_T
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NTAPI
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RtlCompareMemory(IN const VOID *Source1,
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IN const VOID *Source2,
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IN SIZE_T Length)
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{
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SIZE_T i;
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for (i = 0; (i < Length) && (((PUCHAR)Source1)[i] == ((PUCHAR)Source2)[i]); i++)
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;
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return i;
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}
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/*
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* FUNCTION: Compares a block of ULONGs with an ULONG and returns the number of equal bytes
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* ARGUMENTS:
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* Source = Block to compare
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* Length = Number of bytes to compare
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* Value = Value to compare
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* RETURNS: Number of equal bytes
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*
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* @implemented
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*/
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SIZE_T
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NTAPI
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RtlCompareMemoryUlong(IN PVOID Source,
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IN SIZE_T Length,
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IN ULONG Value)
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{
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PULONG ptr = (PULONG)Source;
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ULONG_PTR len = Length / sizeof(ULONG);
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ULONG_PTR i;
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for (i = 0; i < len; i++)
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{
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if (*ptr != Value)
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break;
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ptr++;
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}
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return (SIZE_T)((PCHAR)ptr - (PCHAR)Source);
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}
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#undef RtlFillMemory
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/*
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* @implemented
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*/
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VOID
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NTAPI
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RtlFillMemory(PVOID Destination,
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SIZE_T Length,
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UCHAR Fill)
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{
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memset(Destination, Fill, Length);
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}
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/*
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* @implemented
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*/
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VOID
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NTAPI
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RtlFillMemoryUlong(PVOID Destination,
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SIZE_T Length,
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ULONG Fill)
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{
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PULONG Dest = Destination;
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SIZE_T Count = Length / sizeof(ULONG);
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while (Count > 0)
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{
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*Dest = Fill;
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Dest++;
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Count--;
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}
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}
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#ifdef _WIN64
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VOID
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NTAPI
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RtlFillMemoryUlonglong(
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PVOID Destination,
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SIZE_T Length,
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ULONGLONG Fill)
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{
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PULONGLONG Dest = Destination;
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SIZE_T Count = Length / sizeof(ULONGLONG);
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while (Count > 0)
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{
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*Dest = Fill;
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Dest++;
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Count--;
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}
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}
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#endif
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#undef RtlMoveMemory
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/*
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* @implemented
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*/
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VOID
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NTAPI
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RtlMoveMemory(PVOID Destination,
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CONST VOID *Source,
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SIZE_T Length)
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{
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memmove(Destination, Source, Length);
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}
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#undef RtlZeroMemory
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/*
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* @implemented
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*/
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VOID
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NTAPI
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RtlZeroMemory(PVOID Destination,
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SIZE_T Length)
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{
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RtlFillMemory(Destination, Length, 0);
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}
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/* EOF */
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