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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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crt
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src
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memset.c
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C/C++ Source or Header
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1998-06-17
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2KB
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60 lines
/***
*memset.c - set a section of memory to all one byte
*
* Copyright (c) 1988-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* contains the memset() routine
*
*******************************************************************************/
#include <cruntime.h>
#include <string.h>
#ifdef _MSC_VER
#pragma function(memset)
#endif /* _MSC_VER */
/***
*char *memset(dst, val, count) - sets "count" bytes at "dst" to "val"
*
*Purpose:
* Sets the first "count" bytes of the memory starting
* at "dst" to the character value "val".
*
*Entry:
* void *dst - pointer to memory to fill with val
* int val - value to put in dst bytes
* size_t count - number of bytes of dst to fill
*
*Exit:
* returns dst, with filled bytes
*
*Exceptions:
*
*******************************************************************************/
void * __cdecl memset (
void *dst,
int val,
size_t count
)
{
void *start = dst;
#if defined (_M_MRX000) || defined (_M_ALPHA) || defined (_M_PPC)
{
extern void RtlFillMemory( void *, size_t count, char );
RtlFillMemory( dst, count, (char)val );
}
#else /* defined (_M_MRX000) || defined (_M_ALPHA) || defined (_M_PPC) */
while (count--) {
*(char *)dst = (char)val;
dst = (char *)dst + 1;
}
#endif /* defined (_M_MRX000) || defined (_M_ALPHA) || defined (_M_PPC) */
return(start);
}