memset()

Set memory to a given value

Synopsis:

#include <string.h>

void* memset( void* dst,
              int c,
              size_t length );

Arguments:

dst: A pointer to the memory that you want to set.
c: The value that you want to store in each byte.
length: The number of bytes to set.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The memset() function fills length bytes starting at dst with the value c.

Note: The compiler might optimize out calls to memset if it appears that the memory isn't used again in the calling function. For a secure routine that forces the memory to be set, call memset_s().

Returns:

A pointer to the destination buffer (that is, the value of dst).

Examples:

#include <string.h>
#include <stdlib.h>
#include <stdio.h>

int main( void )
{
    char buffer[80];

    memset( buffer, '=', 80 );
    buffer[79] = '\0';
    
    puts( buffer );
    
    return EXIT_SUCCESS;
}

Classification:

ANSI, POSIX 1003.1

Safety:
Cancellation point	No
Interrupt handler	Yes
Signal handler	Yes
Thread	Yes