mirror of
https://github.com/reactos/reactos.git
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174 lines
2.7 KiB
C
174 lines
2.7 KiB
C
/* 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 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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* @implemented
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*/
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ULONG
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NTAPI
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RtlCompareMemoryUlong (
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PVOID Source,
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ULONG Length,
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ULONG Value
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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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{
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PULONG ptr = (PULONG)Source;
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ULONG len = Length / sizeof(ULONG);
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ULONG 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 (ULONG)((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 (
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PVOID Destination,
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ULONG Length,
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UCHAR Fill
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)
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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 (
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PVOID Destination,
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ULONG Length,
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ULONG Fill
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)
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{
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PULONG Dest = Destination;
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ULONG 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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#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 (
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PVOID Destination,
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CONST VOID * Source,
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ULONG Length
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)
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{
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memmove (
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Destination,
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Source,
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Length
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);
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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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FASTCALL
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RtlPrefetchMemoryNonTemporal(
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IN PVOID Source,
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IN SIZE_T Length
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)
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{
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/* By nature of prefetch, this is non-portable. */
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(void)Source;
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(void)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 (
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PVOID Destination,
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ULONG Length
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)
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{
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RtlFillMemory (
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Destination,
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Length,
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0
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);
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}
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/* EOF */
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