Replace unpack_entry_gently with unpack_entry.
The unpack_entry_gently function currently has only two callers: the delta base resolution in sha1_file.c and the main loop of pack-check.c. Both of these must change to using unpack_entry directly when we implement sliding window mmap logic, so I'm doing it earlier to help break down the change set. This may cause a slight performance decrease for delta base resolution as well as for pack-check.c's verify_packfile(), as the pack use counter will be incremented and decremented for every object that is unpacked. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
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2
cache.h
2
cache.h
@ -394,7 +394,7 @@ extern struct packed_git *add_packed_git(char *, int, int);
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extern int num_packed_objects(const struct packed_git *p);
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extern int nth_packed_object_sha1(const struct packed_git *, int, unsigned char*);
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extern unsigned long find_pack_entry_one(const unsigned char *, struct packed_git *);
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extern void *unpack_entry_gently(struct packed_git *, unsigned long, char *, unsigned long *);
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extern void *unpack_entry(struct packed_git *, unsigned long, char *, unsigned long *);
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extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
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extern void packed_object_info_detail(struct packed_git *, unsigned long, char *, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
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@ -51,7 +51,7 @@ static int verify_packfile(struct packed_git *p)
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offset = find_pack_entry_one(sha1, p);
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if (!offset)
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die("internal error pack-check find-pack-entry-one");
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data = unpack_entry_gently(p, offset, type, &size);
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data = unpack_entry(p, offset, type, &size);
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if (!data) {
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err = error("cannot unpack %s from %s",
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sha1_to_hex(sha1), p->pack_name);
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35
sha1_file.c
35
sha1_file.c
@ -1110,7 +1110,7 @@ static void *unpack_delta_entry(struct packed_git *p,
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unsigned long result_size, base_size, base_offset;
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offset = get_delta_base(p, offset, kind, obj_offset, &base_offset);
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base = unpack_entry_gently(p, base_offset, type, &base_size);
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base = unpack_entry(p, base_offset, type, &base_size);
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if (!base)
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die("failed to read delta base object at %lu from %s",
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base_offset, p->pack_name);
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@ -1127,43 +1127,34 @@ static void *unpack_delta_entry(struct packed_git *p,
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return result;
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}
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static void *unpack_entry(struct pack_entry *entry,
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char *type, unsigned long *sizep)
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{
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struct packed_git *p = entry->p;
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void *retval;
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if (use_packed_git(p))
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die("cannot map packed file");
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retval = unpack_entry_gently(p, entry->offset, type, sizep);
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unuse_packed_git(p);
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if (!retval)
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die("corrupted pack file %s", p->pack_name);
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return retval;
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}
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/* The caller is responsible for use_packed_git()/unuse_packed_git() pair */
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void *unpack_entry_gently(struct packed_git *p, unsigned long offset,
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void *unpack_entry(struct packed_git *p, unsigned long offset,
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char *type, unsigned long *sizep)
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{
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unsigned long size, obj_offset = offset;
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enum object_type kind;
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void *retval;
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if (use_packed_git(p))
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die("cannot map packed file");
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offset = unpack_object_header(p, offset, &kind, &size);
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switch (kind) {
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case OBJ_OFS_DELTA:
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case OBJ_REF_DELTA:
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return unpack_delta_entry(p, offset, size, kind, obj_offset, type, sizep);
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retval = unpack_delta_entry(p, offset, size, kind, obj_offset, type, sizep);
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break;
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case OBJ_COMMIT:
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case OBJ_TREE:
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case OBJ_BLOB:
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case OBJ_TAG:
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strcpy(type, type_names[kind]);
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*sizep = size;
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return unpack_compressed_entry(p, offset, size);
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retval = unpack_compressed_entry(p, offset, size);
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break;
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default:
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return NULL;
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die("unknown object type %i in %s", kind, p->pack_name);
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}
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unuse_packed_git(p);
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return retval;
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}
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int num_packed_objects(const struct packed_git *p)
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@ -1312,7 +1303,7 @@ static void *read_packed_sha1(const unsigned char *sha1, char *type, unsigned lo
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error("cannot read sha1_file for %s", sha1_to_hex(sha1));
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return NULL;
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}
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return unpack_entry(&e, type, size);
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return unpack_entry(e.p, e.offset, type, size);
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}
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void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size)
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