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Copy bytes from one buffer to another, handling overlapping memory correctly
#include <string.h>
void* memmove( 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 memmove() function copies
length bytes from the buffer pointed to by src
to the buffer pointed to by dst.
Copying of overlapping regions is handled safely.
Use
memcpy()
for greater speed when copying buffers that don't 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];
strcpy( buffer, "World");
memmove( buffer+1, buffer, 79 );
printf ("%s\n", buffer);
return EXIT_SUCCESS;
}
produces the output:
WWorld
ANSI,
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
Yes |
Signal handler |
Yes |
Thread |
Yes |
memccpy(),
memchr(),
memcmp(),
memcpy(),
memicmp(),
memset(),
wmemmove()
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