Function write_no_reuse_object

builtin/pack-objects.c:514–630

Return 0 if we will bust the pack-size limit */

/* Return 0 if we will bust the pack-size limit */
static unsigned long write_no_reuse_object(struct hashfile *f, struct object_entry *entry,
					   unsigned long limit, int usable_delta)
{
	unsigned long size, datalen;
	unsigned char header[MAX_PACK_OBJECT_HEADER],
		      dheader[MAX_PACK_OBJECT_HEADER];
	unsigned hdrlen;
	enum object_type type;
	void *buf;
	struct odb_read_stream *st = NULL;
	const unsigned hashsz = the_hash_algo->rawsz;

	if (!usable_delta) {
		if (oe_type(entry) == OBJ_BLOB &&
		    oe_size_greater_than(&to_pack, entry,
					 repo_settings_get_big_file_threshold(the_repository)) &&
		    (st = odb_read_stream_open(the_repository->objects, &entry->idx.oid,
					       NULL)) != NULL) {
			buf = NULL;
			type = st->type;
			size = st->size;
		} else {
			size_t size_st = 0;
			buf = odb_read_object(the_repository->objects,
					      &entry->idx.oid, &type,
					      &size_st);
			size = cast_size_t_to_ulong(size_st);
			if (!buf)
				die(_("unable to read %s"),
				    oid_to_hex(&entry->idx.oid));
		}
		/*
		 * make sure no cached delta data remains from a
		 * previous attempt before a pack split occurred.
		 */
		FREE_AND_NULL(entry->delta_data);
		entry->z_delta_size = 0;
	} else if (entry->delta_data) {
		size = DELTA_SIZE(entry);
		buf = entry->delta_data;
		entry->delta_data = NULL;
		type = (allow_ofs_delta && DELTA(entry)->idx.offset) ?
			OBJ_OFS_DELTA : OBJ_REF_DELTA;
	} else {
		buf = get_delta(entry);
		size = DELTA_SIZE(entry);
		type = (allow_ofs_delta && DELTA(entry)->idx.offset) ?
			OBJ_OFS_DELTA : OBJ_REF_DELTA;
	}

	if (st)	/* large blob case, just assume we don't compress well */
		datalen = size;
	else if (entry->z_delta_size)
		datalen = entry->z_delta_size;
	else
		datalen = do_compress(&buf, size);

	/*