Function cbfs_copy_instance

util/cbfstool/cbfs_image.c:356–408

}

int cbfs_copy_instance(struct cbfs_image *image, struct buffer *dst)
{
	assert(image);

	struct cbfs_file *src_entry, *dst_entry;
	size_t align;
	ssize_t last_entry_size;

	size_t copy_end = buffer_size(dst);

	align = CBFS_ALIGNMENT;

	dst_entry = (struct cbfs_file *)buffer_get(dst);

	/* Copy non-empty files */
	for (src_entry = cbfs_find_first_entry(image);
	     src_entry && cbfs_is_valid_entry(image, src_entry);
	     src_entry = cbfs_find_next_entry(image, src_entry)) {
		size_t entry_size;

		if ((src_entry->type == htobe32(CBFS_TYPE_NULL)) ||
		    (src_entry->type == htobe32(CBFS_TYPE_CBFSHEADER)) ||
		    (src_entry->type == htobe32(CBFS_TYPE_DELETED)))
			continue;

		entry_size = htobe32(src_entry->len) + htobe32(src_entry->offset);
		memcpy(dst_entry, src_entry, entry_size);
		dst_entry = (struct cbfs_file *)(
			(uintptr_t)dst_entry + align_up(entry_size, align));

		if ((size_t)((uint8_t *)dst_entry - (uint8_t *)buffer_get(dst))
					>= copy_end) {
			ERROR("Ran out of room in copy region.\n");
			return 1;
		}
	}

	/* Last entry size is all the room above it, except for top 4 bytes
	 * which may be used by the master header pointer. This messes with
	 * the ability to stash something "top-aligned" into the region, but
	 * keeps things simpler. */
	last_entry_size = copy_end -
		((uint8_t *)dst_entry - (uint8_t *)buffer_get(dst)) -
		cbfs_calculate_file_header_size("") - sizeof(int32_t);

	if (last_entry_size < 0)
		WARN("No room to create the last entry!\n");
	else
		return cbfs_create_empty_entry(dst_entry, CBFS_TYPE_NULL,
					       last_entry_size, "");

	return 0;
}

int cbfs_expand_to_region(struct buffer *region)
{