memcpy()

Copy bytes from one buffer to another

Synopsis:

#include <string.h>

void* memcpy( void* dst,
              const void* src,
              size_t length );

Library:

libc

Description:

The memcpy() function copies length bytes from the buffer pointed to by src into the buffer pointed to by dst.

Copying overlapping buffers isn't guaranteed to work; use memmove() to to copy buffers that overlap.

Returns:

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

Examples:

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

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

    memcpy( buffer, "Hello", 5 );
    buffer[5] = '\0';
    printf( "%s\n", buffer );
    
    return EXIT_SUCCESS;
}

Classification:

ANSI

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