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-rw-r--r--third_party/git/pack-objects.h444
1 files changed, 0 insertions, 444 deletions
diff --git a/third_party/git/pack-objects.h b/third_party/git/pack-objects.h
deleted file mode 100644
index 857d43850b..0000000000
--- a/third_party/git/pack-objects.h
+++ /dev/null
@@ -1,444 +0,0 @@
-#ifndef PACK_OBJECTS_H
-#define PACK_OBJECTS_H
-
-#include "object-store.h"
-#include "thread-utils.h"
-#include "pack.h"
-
-struct repository;
-
-#define DEFAULT_DELTA_CACHE_SIZE (256 * 1024 * 1024)
-
-#define OE_DFS_STATE_BITS	2
-#define OE_DEPTH_BITS		12
-#define OE_IN_PACK_BITS		10
-#define OE_Z_DELTA_BITS		20
-/*
- * Note that oe_set_size() becomes expensive when the given size is
- * above this limit. Don't lower it too much.
- */
-#define OE_SIZE_BITS		31
-#define OE_DELTA_SIZE_BITS	23
-
-/*
- * State flags for depth-first search used for analyzing delta cycles.
- *
- * The depth is measured in delta-links to the base (so if A is a delta
- * against B, then A has a depth of 1, and B a depth of 0).
- */
-enum dfs_state {
-	DFS_NONE = 0,
-	DFS_ACTIVE,
-	DFS_DONE,
-	DFS_NUM_STATES
-};
-
-/*
- * The size of struct nearly determines pack-objects's memory
- * consumption. This struct is packed tight for that reason. When you
- * add or reorder something in this struct, think a bit about this.
- *
- * basic object info
- * -----------------
- * 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 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. Note that when a
- * delta is reused, "size" is the uncompressed _delta_ size, not the
- * canonical one after the delta has been applied.
- *
- * "hash" contains a path name hash which is used for sorting the
- * delta list and also during delta searching. Once prepare_pack()
- * returns it's no longer needed.
- *
- * source pack info
- * ----------------
- * 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 to
- * reflect that delta graph from the source pack then updated or added
- * during delta searching phase when we find better deltas.
- *
- * delta_child and delta_sibling are last needed in
- * 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
- * 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
- * cached.
- *
- * [1] during try_delta phase we don't bother with compressing because
- * the delta could be quickly replaced with a better one.
- */
-struct object_entry {
-	struct pack_idx_entry idx;
-	void *delta_data;	/* cached delta (uncompressed) */
-	off_t in_pack_offset;
-	uint32_t hash;			/* name hint hash */
-	unsigned size_:OE_SIZE_BITS;
-	unsigned size_valid:1;
-	uint32_t delta_idx;	/* delta base object */
-	uint32_t delta_child_idx; /* deltified objects who bases me */
-	uint32_t delta_sibling_idx; /* other deltified objects who
-				     * uses the same base as me
-				     */
-	unsigned delta_size_:OE_DELTA_SIZE_BITS; /* delta data size (uncompressed) */
-	unsigned delta_size_valid:1;
-	unsigned char in_pack_header_size;
-	unsigned in_pack_idx:OE_IN_PACK_BITS;	/* already in pack */
-	unsigned z_delta_size:OE_Z_DELTA_BITS;
-	unsigned type_valid:1;
-	unsigned no_try_delta:1;
-	unsigned type_:TYPE_BITS;
-	unsigned in_pack_type:TYPE_BITS; /* could be delta */
-
-	unsigned preferred_base:1; /*
-				    * we do not pack this, but is available
-				    * to be used as the base object to delta
-				    * objects against.
-				    */
-	unsigned tagged:1; /* near the very tip of refs */
-	unsigned filled:1; /* assigned write-order */
-	unsigned dfs_state:OE_DFS_STATE_BITS;
-	unsigned depth:OE_DEPTH_BITS;
-	unsigned ext_base:1; /* delta_idx points outside packlist */
-
-	/*
-	 * pahole results on 64-bit linux (gcc and clang)
-	 *
-	 *   size: 80, bit_padding: 9 bits
-	 *
-	 * and on 32-bit (gcc)
-	 *
-	 *   size: 76, bit_padding: 9 bits
-	 */
-};
-
-struct packing_data {
-	struct repository *repo;
-	struct object_entry *objects;
-	uint32_t nr_objects, nr_alloc;
-
-	int32_t *index;
-	uint32_t index_size;
-
-	unsigned int *in_pack_pos;
-	unsigned long *delta_size;
-
-	/*
-	 * Only one of these can be non-NULL and they have different
-	 * sizes. if in_pack_by_idx is allocated, oe_in_pack() returns
-	 * the pack of an object using in_pack_idx field. If not,
-	 * in_pack[] array is used the same way as in_pack_pos[]
-	 */
-	struct packed_git **in_pack_by_idx;
-	struct packed_git **in_pack;
-
-	/*
-	 * During packing with multiple threads, protect the in-core
-	 * object database from concurrent accesses.
-	 */
-	pthread_mutex_t odb_lock;
-
-	/*
-	 * This list contains entries for bases which we know the other side
-	 * has (e.g., via reachability bitmaps), but which aren't in our
-	 * "objects" list.
-	 */
-	struct object_entry *ext_bases;
-	uint32_t nr_ext, alloc_ext;
-
-	uintmax_t oe_size_limit;
-	uintmax_t oe_delta_size_limit;
-
-	/* delta islands */
-	unsigned int *tree_depth;
-	unsigned char *layer;
-};
-
-void prepare_packing_data(struct repository *r, struct packing_data *pdata);
-
-/* Protect access to object database */
-static inline void packing_data_lock(struct packing_data *pdata)
-{
-	pthread_mutex_lock(&pdata->odb_lock);
-}
-static inline void packing_data_unlock(struct packing_data *pdata)
-{
-	pthread_mutex_unlock(&pdata->odb_lock);
-}
-
-struct object_entry *packlist_alloc(struct packing_data *pdata,
-				    const unsigned char *sha1,
-				    uint32_t index_pos);
-
-struct object_entry *packlist_find(struct packing_data *pdata,
-				   const struct object_id *oid,
-				   uint32_t *index_pos);
-
-static inline uint32_t pack_name_hash(const char *name)
-{
-	uint32_t c, hash = 0;
-
-	if (!name)
-		return 0;
-
-	/*
-	 * This effectively just creates a sortable number from the
-	 * last sixteen non-whitespace characters. Last characters
-	 * count "most", so things that end in ".c" sort together.
-	 */
-	while ((c = *name++) != 0) {
-		if (isspace(c))
-			continue;
-		hash = (hash >> 2) + (c << 24);
-	}
-	return hash;
-}
-
-static inline enum object_type oe_type(const struct object_entry *e)
-{
-	return e->type_valid ? e->type_ : OBJ_BAD;
-}
-
-static inline void oe_set_type(struct object_entry *e,
-			       enum object_type type)
-{
-	if (type >= OBJ_ANY)
-		BUG("OBJ_ANY cannot be set in pack-objects code");
-
-	e->type_valid = type >= OBJ_NONE;
-	e->type_ = (unsigned)type;
-}
-
-static inline unsigned int oe_in_pack_pos(const struct packing_data *pack,
-					  const struct object_entry *e)
-{
-	return pack->in_pack_pos[e - pack->objects];
-}
-
-static inline void oe_set_in_pack_pos(const struct packing_data *pack,
-				      const struct object_entry *e,
-				      unsigned int pos)
-{
-	pack->in_pack_pos[e - pack->objects] = pos;
-}
-
-static inline struct packed_git *oe_in_pack(const struct packing_data *pack,
-					    const struct object_entry *e)
-{
-	if (pack->in_pack_by_idx)
-		return pack->in_pack_by_idx[e->in_pack_idx];
-	else
-		return pack->in_pack[e - pack->objects];
-}
-
-void oe_map_new_pack(struct packing_data *pack);
-
-static inline void oe_set_in_pack(struct packing_data *pack,
-				  struct object_entry *e,
-				  struct packed_git *p)
-{
-	if (!p->index)
-		oe_map_new_pack(pack);
-	if (pack->in_pack_by_idx)
-		e->in_pack_idx = p->index;
-	else
-		pack->in_pack[e - pack->objects] = p;
-}
-
-static inline struct object_entry *oe_delta(
-		const struct packing_data *pack,
-		const struct object_entry *e)
-{
-	if (!e->delta_idx)
-		return NULL;
-	if (e->ext_base)
-		return &pack->ext_bases[e->delta_idx - 1];
-	else
-		return &pack->objects[e->delta_idx - 1];
-}
-
-static inline void oe_set_delta(struct packing_data *pack,
-				struct object_entry *e,
-				struct object_entry *delta)
-{
-	if (delta)
-		e->delta_idx = (delta - pack->objects) + 1;
-	else
-		e->delta_idx = 0;
-}
-
-void oe_set_delta_ext(struct packing_data *pack,
-		      struct object_entry *e,
-		      const unsigned char *sha1);
-
-static inline struct object_entry *oe_delta_child(
-		const struct packing_data *pack,
-		const struct object_entry *e)
-{
-	if (e->delta_child_idx)
-		return &pack->objects[e->delta_child_idx - 1];
-	return NULL;
-}
-
-static inline void oe_set_delta_child(struct packing_data *pack,
-				      struct object_entry *e,
-				      struct object_entry *delta)
-{
-	if (delta)
-		e->delta_child_idx = (delta - pack->objects) + 1;
-	else
-		e->delta_child_idx = 0;
-}
-
-static inline struct object_entry *oe_delta_sibling(
-		const struct packing_data *pack,
-		const struct object_entry *e)
-{
-	if (e->delta_sibling_idx)
-		return &pack->objects[e->delta_sibling_idx - 1];
-	return NULL;
-}
-
-static inline void oe_set_delta_sibling(struct packing_data *pack,
-					struct object_entry *e,
-					struct object_entry *delta)
-{
-	if (delta)
-		e->delta_sibling_idx = (delta - pack->objects) + 1;
-	else
-		e->delta_sibling_idx = 0;
-}
-
-unsigned long oe_get_size_slow(struct packing_data *pack,
-			       const struct object_entry *e);
-static inline unsigned long oe_size(struct packing_data *pack,
-				    const struct object_entry *e)
-{
-	if (e->size_valid)
-		return e->size_;
-
-	return oe_get_size_slow(pack, e);
-}
-
-static inline int oe_size_less_than(struct packing_data *pack,
-				    const struct object_entry *lhs,
-				    unsigned long rhs)
-{
-	if (lhs->size_valid)
-		return lhs->size_ < rhs;
-	if (rhs < pack->oe_size_limit) /* rhs < 2^x <= lhs ? */
-		return 0;
-	return oe_get_size_slow(pack, lhs) < rhs;
-}
-
-static inline int oe_size_greater_than(struct packing_data *pack,
-				       const struct object_entry *lhs,
-				       unsigned long rhs)
-{
-	if (lhs->size_valid)
-		return lhs->size_ > rhs;
-	if (rhs < pack->oe_size_limit) /* rhs < 2^x <= lhs ? */
-		return 1;
-	return oe_get_size_slow(pack, lhs) > rhs;
-}
-
-static inline void oe_set_size(struct packing_data *pack,
-			       struct object_entry *e,
-			       unsigned long size)
-{
-	if (size < pack->oe_size_limit) {
-		e->size_ = size;
-		e->size_valid = 1;
-	} else {
-		e->size_valid = 0;
-		if (oe_get_size_slow(pack, e) != size)
-			BUG("'size' is supposed to be the object size!");
-	}
-}
-
-static inline unsigned long oe_delta_size(struct packing_data *pack,
-					  const struct object_entry *e)
-{
-	if (e->delta_size_valid)
-		return e->delta_size_;
-
-	/*
-	 * pack->delta_size[] can't be NULL because oe_set_delta_size()
-	 * must have been called when a new delta is saved with
-	 * oe_set_delta().
-	 * If oe_delta() returns NULL (i.e. default state, which means
-	 * delta_size_valid is also false), then the caller must never
-	 * call oe_delta_size().
-	 */
-	return pack->delta_size[e - pack->objects];
-}
-
-static inline void oe_set_delta_size(struct packing_data *pack,
-				     struct object_entry *e,
-				     unsigned long size)
-{
-	if (size < pack->oe_delta_size_limit) {
-		e->delta_size_ = size;
-		e->delta_size_valid = 1;
-	} else {
-		packing_data_lock(pack);
-		if (!pack->delta_size)
-			ALLOC_ARRAY(pack->delta_size, pack->nr_alloc);
-		packing_data_unlock(pack);
-
-		pack->delta_size[e - pack->objects] = size;
-		e->delta_size_valid = 0;
-	}
-}
-
-static inline unsigned int oe_tree_depth(struct packing_data *pack,
-					 struct object_entry *e)
-{
-	if (!pack->tree_depth)
-		return 0;
-	return pack->tree_depth[e - pack->objects];
-}
-
-static inline void oe_set_tree_depth(struct packing_data *pack,
-				     struct object_entry *e,
-				     unsigned int tree_depth)
-{
-	if (!pack->tree_depth)
-		CALLOC_ARRAY(pack->tree_depth, pack->nr_alloc);
-	pack->tree_depth[e - pack->objects] = tree_depth;
-}
-
-static inline unsigned char oe_layer(struct packing_data *pack,
-				     struct object_entry *e)
-{
-	if (!pack->layer)
-		return 0;
-	return pack->layer[e - pack->objects];
-}
-
-static inline void oe_set_layer(struct packing_data *pack,
-				struct object_entry *e,
-				unsigned char layer)
-{
-	if (!pack->layer)
-		CALLOC_ARRAY(pack->layer, pack->nr_alloc);
-	pack->layer[e - pack->objects] = layer;
-}
-
-#endif