v5 changes are small enough that the interdiff is pretty self
explanatory (there's also a couple commit msg updates).
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index c388d87c3e..fb2aba80bf 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -1611,7 +1611,7 @@ static void drop_reused_delta(struct object_entry *entry)
/*
* We failed to get the info from this pack for some reason;
* fall back to sha1_object_info, which may find another copy.
- * And if that fails, the error will be recorded in entry->type
+ * And if that fails, the error will be recorded in
oe_type(entry)
* and dealt with in prepare_pack().
*/
oe_set_type(entry, sha1_object_info(entry->idx.oid.hash,
@@ -1968,7 +1968,7 @@ static int try_delta(struct unpacked *trg, struct
unpacked *src,
delta_buf = create_delta(src->index, trg->data, trg_size, &delta_size,
max_size);
if (!delta_buf)
return 0;
- if (delta_size >= maximum_unsigned_value_of_type(uint32_t))
+ if (delta_size >= (1 << OE_DELTA_SIZE_BITS))
return 0;
if (DELTA(trg_entry)) {
@@ -2125,8 +2125,8 @@ static void find_deltas(struct object_entry **list,
unsigned *list_size,
unsigned long size;
size = do_compress(&entry->delta_data,
DELTA_SIZE(entry));
- entry->z_delta_size = size;
- if (entry->z_delta_size == size) {
+ if (size < (1 << OE_Z_DELTA_BITS)) {
+ entry->z_delta_size = size;
cache_lock();
delta_cache_size -= DELTA_SIZE(entry);
delta_cache_size += entry->z_delta_size;
diff --git a/pack-objects.h b/pack-objects.h
index 0fa0c83294..8979289f5f 100644
--- a/pack-objects.h
+++ b/pack-objects.h
@@ -27,14 +27,15 @@ enum dfs_state {
*
* basic object info
* -----------------
- * idx.oid is filled up before delta searching starts. idx.crc32 and
- * is only valid after the object is written out and will be used for
+ * idx.oid is filled up before delta searching starts. idx.crc32 is
+ * only valid after the object is written out and will be used for
* generating the index. idx.offset will be both gradually set and
* used in writing phase (base objects get offset first, then deltas
* refer to them)
*
- * "size" is the uncompressed object size. Compressed size is not
- * cached (ie. raw data in a pack) but available via revindex.
+ * "size" is the uncompressed object size. Compressed size of the raw
+ * data for an object in a pack is not stored anywhere but is computed
+ * and made available when reverse .idx is made.
*
* "hash" contains a path name hash which is used for sorting the
* delta list and also during delta searching. Once prepare_pack()
@@ -42,16 +43,16 @@ enum dfs_state {
*
* source pack info
* ----------------
- * The (in_pack, in_pack_offset, in_pack_header_size) tuple contains
- * the location of the object in the source pack, with or without
- * header.
+ * The (in_pack, in_pack_offset) tuple contains the location of the
+ * object in the source pack. in_pack_header_size allows quickly
+ * skipping the header and going straight to the zlib stream.
*
* "type" and "in_pack_type" both describe object type. in_pack_type
* may contain a delta type, while type is always the canonical type.
*
* deltas
* ------
- * Delta links (delta, delta_child and delta_sibling) are created
+ * Delta links (delta, delta_child and delta_sibling) are created to
* reflect that delta graph from the source pack then updated or added
* during delta searching phase when we find better deltas.
*
@@ -59,7 +60,7 @@ enum dfs_state {
* compute_write_order(). "delta" and "delta_size" must remain valid
* at object writing phase in case the delta is not cached.
*
- * If a delta is cached in memory and is compressed delta_data points
+ * If a delta is cached in memory and is compressed, delta_data points
* to the data and z_delta_size contains the compressed size. If it's
* uncompressed [1], z_delta_size must be zero. delta_size is always
* the uncompressed size and must be valid even if the delta is not
@@ -274,12 +275,19 @@ static inline unsigned long oe_size(const struct
object_entry *e)
}
}
+static inline int contains_in_32bits(unsigned long limit)
+{
+ uint32_t truncated_limit = (uint32_t)limit;
+
+ return limit == truncated_limit;
+}
+
static inline int oe_size_less_than(const struct object_entry *e,
unsigned long limit)
{
if (e->size_valid)
return e->size_ < limit;
- if (limit > maximum_unsigned_value_of_type(uint32_t))
+ if (contains_in_32bits(limit))
return 1;
return oe_size(e) < limit;
}
@@ -289,8 +297,8 @@ static inline int oe_size_greater_than(const struct
object_entry *e,
{
if (e->size_valid)
return e->size_ > limit;
- if (limit <= maximum_unsigned_value_of_type(uint32_t))
- return 1;
+ if (contains_in_32bits(limit))
+ return 0;
return oe_size(e) > limit;
}
@@ -314,7 +322,7 @@ static inline void oe_set_delta_size(struct packing_data
*pack,
unsigned long size)
{
e->delta_size_ = size;
- e->delta_size_valid =e->delta_size_ == size;
+ e->delta_size_valid = e->delta_size_ == size;
if (!e->delta_size_valid && size != oe_size(e))
die("BUG: this can only happen in check_object() "
"where delta size is the same as entry size");
--
2.17.0.rc0.347.gf9cf61673a
