Function copy_from

lightningd/log.c:136–146

buf1/buf1len & buf2/buf2len -> dest/destlen */

/* buf1/buf1len & buf2/buf2len -> dest/destlen */
static size_t copy_from(void *dest, size_t destlen,
			const void *buf1, size_t buf1len,
			const void *buf2, size_t buf2len)
{
	assert(destlen == buf1len + buf2len);
	if (buf1len)
		memcpy(dest, buf1, buf1len);
	if (buf2len)
		memcpy((char *)dest + buf1len, buf2, buf2len);
	return destlen;
}

/* dest/destlen -> buf1/buf1len & buf2/buf2len */
static size_t copy_to(void *buf1, size_t buf1len,