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Copy bytes from one buffer to another
#include <string.h>
void* memcpy( void* dst,
const void* src,
size_t length );
- dest
- A pointer to where you want the function to copy the data.
- src
- A pointer to the buffer that you want to copy data from.
- length
- The number of bytes to copy.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
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. |
A pointer to the destination buffer (that is, the value of dst).
#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;
}
ANSI,
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
Yes |
Signal handler |
Yes |
Thread |
Yes |
memccpy(),
memchr(),
memcmp(),
memicmp(),
memmove(),
memset()
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