Copy LENGTH bytes from SOURCE to DEST. Does not null-terminate.

/* memmove.c -- copy memory.
Copy LENGTH bytes from SOURCE to DEST. Does not null-terminate.
In the public domain.
By David MacKenzie <[email protected]>. */

#include <config.h>

#include <stddef.h>

void *
memmove (void *dest0, void const *source0, size_t length)
{
char *dest = dest0;
char const *source = source0;
if (source < dest)
/* Moving from low mem to hi mem; start at end. */
for (source += length, dest += length; length; --length)
*--dest = *--source;
else if (source != dest)
{
/* Moving from hi mem to low mem; start at beginning. */
for (; length; --length)
*dest++ = *source++;
}
return dest0;
}