belliash
d56b10f252
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* Export RtlWideStringTokenize() * Allow to compare whole strings in RtlWideStringCompare() when no length specified * RtlSameMemory() returns boolean now * Source bytes can be constant value in RtlCopyMemory()
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtoskrnl/rtl/memory.c
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* DESCRIPTION: Memory related routines
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <xtkmapi.h>
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/**
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* This routine copies a block of memory.
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*
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* @param Destination
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* Supplies a pointer to the buffer where data will be copied to.
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*
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* @param Source
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* Supplies a pointer to the source buffer that will be copied.
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*
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* @param Length
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* Specifies the number of bytes to copy.
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*
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* @return This routine does not return any value.
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*
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* @since NT 3.5
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*/
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XTAPI
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VOID
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RtlCopyMemory(IN PVOID Destination,
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IN PCVOID Source,
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IN SIZE_T Length)
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{
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PCHAR DestinationBytes = (PCHAR)Destination;
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PCCHAR SourceBytes = (PCHAR)Source;
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/* Forward buffer copy */
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while(Length--)
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{
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*DestinationBytes++ = *SourceBytes++;
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}
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}
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/**
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* This routine compares the first bytes of the specified memory buffers.
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*
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* @param LeftBuffer
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* Supplies a pointer to the first block of memory to compare.
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*
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* @param RightBuffer
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* Supplies a pointer to the second block of memory to compare.
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*
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* @param Length
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* Specifies a number of bytes to compare.
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*
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* @return Returns TRUE if both buffers are equal up to the specified length, or FALSE otherwise.
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*
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* @since XT 1.0
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*/
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XTAPI
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BOOLEAN
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RtlSameMemory(IN PCVOID LeftBuffer,
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IN PCVOID RightBuffer,
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IN SIZE_T Length)
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{
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CONST CHAR *Left = (PCHAR)LeftBuffer;
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CONST CHAR *Right = (PCHAR)RightBuffer;
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/* Check if there is anything to compare */
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if(Length)
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{
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/* Iterate through whole buffer length */
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while(Length--)
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{
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/* Compare bytes from both bufers */
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if(*Left != *Right)
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{
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/* Buffers differ */
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return FALSE;
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}
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/* Advance to next byte */
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Left++;
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Right++;
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}
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}
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/* Buffers equal */
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return TRUE;
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}
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