__stosb
Visual Studio 2015
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Microsoft Specific**
Generates a store string instruction (rep stosb).
void __stosb( unsigned char* Dest, unsigned char Data, size_t Count );
Parameters
[out] Dest
The destination of the operation.
[in] Data
The data to store.
[in] Count
The length of the block of bytes to write.
| Intrinsic | Architecture |
|---|---|
__stosb | x86, x64 |
Header file <intrin.h>
The result is that the character Data is written into a block of Count bytes in the Dest string.
This routine is only available as an intrinsic.
// stosb.c
// processor: x86, x64
#include <stdio.h>
#include <intrin.h>
#pragma intrinsic(__stosb)
int main()
{
unsigned char c = 0x40; /* '@' character */
unsigned char s[] = "*********************************";
printf_s("%s\n", s);
__stosb((unsigned char*)s+1, c, 6);
printf_s("%s\n", s);
}
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