Function map_copy

common/gossmap.c:104–128

Accessors for the gossmap */

/* Accessors for the gossmap */
static void map_copy(const struct gossmap *map, u64 offset,
		     void *dst, size_t len)
{
	/* After mmap, we place local channel_announcements then channel_updates */
	if (offset >= map->map_size) {
		u64 localannoff = offset - map->map_size;
		if (localannoff < tal_bytelen(map->local_announces)) {
			assert(localannoff + len <= tal_bytelen(map->local_announces));
			memcpy(dst, map->local_announces + localannoff, len);
		} else {
			u64 localchanoff = localannoff - tal_bytelen(map->local_announces);
			assert(localchanoff + len <= tal_bytelen(map->local_updates));
			memcpy(dst, map->local_updates + localchanoff, len);
		}
	} else {
		assert(offset + len <= map->map_size);
		if (map->mmap)
			memcpy(dst, map->mmap + offset, len);
		else {
			/* Yeah, we'll crash on I/O errors. */
			if (pread(map->fd, dst, len, offset) != len)
				abort();
		}
	}
}

static u8 map_u8(const struct gossmap *map, u64 offset)
{