зеркало из https://github.com/microsoft/git.git
Merge early parts of branch 'np/pack'
This commit is contained in:
Junio C Hamano
Коммит
d1cb7ac49b
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@ -597,15 +597,15 @@ static int add_object_entry(const unsigned char *sha1, unsigned hash, int exclud
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if (!exclude) {
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for (p = packed_git; p; p = p->next) {
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struct pack_entry e;
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if (find_pack_entry_one(sha1, &e, p)) {
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unsigned long offset = find_pack_entry_one(sha1, p);
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if (offset) {
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if (incremental)
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return 0;
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if (local && !p->pack_local)
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return 0;
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if (!found_pack) {
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found_offset = e.offset;
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found_pack = e.p;
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found_offset = offset;
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found_pack = p;
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}
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}
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}
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6
cache.h
6
cache.h
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@ -390,10 +390,10 @@ extern void unuse_packed_git(struct packed_git *);
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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 int find_pack_entry_one(const unsigned char *, struct pack_entry *, struct packed_git *);
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extern void *unpack_entry_gently(struct pack_entry *, char *, unsigned long *);
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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 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 pack_entry *, char *, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
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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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/* Dumb servers support */
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extern int update_server_info(int);
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@ -308,8 +308,8 @@ create_delta(const struct delta_index *index,
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continue;
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if (ref_size > top - src)
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ref_size = top - src;
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if (ref_size > 0x10000)
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ref_size = 0x10000;
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if (ref_size > 0xffffff)
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ref_size = 0xffffff;
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if (ref_size <= msize)
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break;
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while (ref_size-- && *src++ == *ref)
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@ -318,6 +318,8 @@ create_delta(const struct delta_index *index,
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/* this is our best match so far */
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msize = ref - entry->ptr;
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moff = entry->ptr - ref_data;
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if (msize >= 0x10000)
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break; /* this is good enough */
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}
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}
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@ -381,6 +383,8 @@ create_delta(const struct delta_index *index,
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if (msize & 0xff) { out[outpos++] = msize; i |= 0x10; }
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msize >>= 8;
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if (msize & 0xff) { out[outpos++] = msize; i |= 0x20; }
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msize >>= 8;
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if (msize & 0xff) { out[outpos++] = msize; i |= 0x40; }
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*op = i;
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}
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19
pack-check.c
19
pack-check.c
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@ -42,16 +42,16 @@ static int verify_packfile(struct packed_git *p)
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*/
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for (i = err = 0; i < nr_objects; i++) {
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unsigned char sha1[20];
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struct pack_entry e;
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void *data;
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char type[20];
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unsigned long size;
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unsigned long size, offset;
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if (nth_packed_object_sha1(p, i, sha1))
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die("internal error pack-check nth-packed-object");
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if (!find_pack_entry_one(sha1, &e, 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(&e, type, &size);
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data = unpack_entry_gently(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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@ -84,25 +84,26 @@ static void show_pack_info(struct packed_git *p)
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for (i = 0; i < nr_objects; i++) {
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unsigned char sha1[20], base_sha1[20];
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struct pack_entry e;
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char type[20];
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unsigned long size;
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unsigned long store_size;
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unsigned long offset;
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unsigned int delta_chain_length;
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if (nth_packed_object_sha1(p, i, sha1))
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die("internal error pack-check nth-packed-object");
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if (!find_pack_entry_one(sha1, &e, 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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packed_object_info_detail(&e, type, &size, &store_size,
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packed_object_info_detail(p, offset, type, &size, &store_size,
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&delta_chain_length,
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base_sha1);
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printf("%s ", sha1_to_hex(sha1));
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if (!delta_chain_length)
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printf("%-6s %lu %u\n", type, size, e.offset);
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printf("%-6s %lu %lu\n", type, size, offset);
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else {
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printf("%-6s %lu %u %u %s\n", type, size, e.offset,
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printf("%-6s %lu %lu %u %s\n", type, size, offset,
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delta_chain_length, sha1_to_hex(base_sha1));
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if (delta_chain_length < MAX_CHAIN)
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chain_histogram[delta_chain_length]++;
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2
pack.h
2
pack.h
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@ -7,7 +7,7 @@
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* Packed object header
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*/
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#define PACK_SIGNATURE 0x5041434b /* "PACK" */
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#define PACK_VERSION 2
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#define PACK_VERSION 3
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#define pack_version_ok(v) ((v) == htonl(2) || (v) == htonl(3))
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struct pack_header {
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unsigned int hdr_signature;
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185
sha1_file.c
185
sha1_file.c
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@ -884,33 +884,32 @@ void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned l
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}
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/* forward declaration for a mutually recursive function */
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static int packed_object_info(struct pack_entry *entry,
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static int packed_object_info(struct packed_git *p, unsigned long offset,
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char *type, unsigned long *sizep);
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static int packed_delta_info(unsigned char *base_sha1,
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unsigned long delta_size,
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unsigned long left,
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static int packed_delta_info(struct packed_git *p,
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unsigned long offset,
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char *type,
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unsigned long *sizep,
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struct packed_git *p)
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unsigned long *sizep)
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{
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struct pack_entry base_ent;
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unsigned long base_offset;
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unsigned char *base_sha1 = (unsigned char *) p->pack_base + offset;
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if (left < 20)
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if (p->pack_size < offset + 20)
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die("truncated pack file");
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/* The base entry _must_ be in the same pack */
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if (!find_pack_entry_one(base_sha1, &base_ent, p))
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base_offset = find_pack_entry_one(base_sha1, p);
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if (!base_offset)
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die("failed to find delta-pack base object %s",
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sha1_to_hex(base_sha1));
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offset += 20;
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/* We choose to only get the type of the base object and
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* ignore potentially corrupt pack file that expects the delta
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* based on a base with a wrong size. This saves tons of
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* inflate() calls.
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*/
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if (packed_object_info(&base_ent, type, NULL))
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if (packed_object_info(p, base_offset, type, NULL))
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die("cannot get info for delta-pack base");
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if (sizep) {
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@ -922,8 +921,8 @@ static int packed_delta_info(unsigned char *base_sha1,
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memset(&stream, 0, sizeof(stream));
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data = stream.next_in = base_sha1 + 20;
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stream.avail_in = left - 20;
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stream.next_in = (unsigned char *) p->pack_base + offset;
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stream.avail_in = p->pack_size - offset;
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stream.next_out = delta_head;
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stream.avail_out = sizeof(delta_head);
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@ -985,75 +984,60 @@ int check_reuse_pack_delta(struct packed_git *p, unsigned long offset,
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return status;
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}
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void packed_object_info_detail(struct pack_entry *e,
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void packed_object_info_detail(struct packed_git *p,
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unsigned long offset,
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char *type,
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unsigned long *size,
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unsigned long *store_size,
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unsigned int *delta_chain_length,
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unsigned char *base_sha1)
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{
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struct packed_git *p = e->p;
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unsigned long offset;
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unsigned char *pack;
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unsigned long val;
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unsigned char *next_sha1;
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enum object_type kind;
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offset = unpack_object_header(p, e->offset, &kind, size);
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pack = (unsigned char *) p->pack_base + offset;
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if (kind != OBJ_DELTA)
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*delta_chain_length = 0;
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else {
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unsigned int chain_length = 0;
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if (p->pack_size <= offset + 20)
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die("pack file %s records an incomplete delta base",
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p->pack_name);
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hashcpy(base_sha1, pack);
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do {
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struct pack_entry base_ent;
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unsigned long junk;
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*delta_chain_length = 0;
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offset = unpack_object_header(p, offset, &kind, size);
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find_pack_entry_one(pack, &base_ent, p);
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offset = unpack_object_header(p, base_ent.offset,
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&kind, &junk);
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pack = (unsigned char *) p->pack_base + offset;
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chain_length++;
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} while (kind == OBJ_DELTA);
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*delta_chain_length = chain_length;
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for (;;) {
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switch (kind) {
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default:
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die("corrupted pack file %s containing object of kind %d",
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p->pack_name, kind);
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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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*store_size = 0; /* notyet */
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return;
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case OBJ_DELTA:
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if (p->pack_size <= offset + 20)
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die("pack file %s records an incomplete delta base",
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p->pack_name);
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next_sha1 = (unsigned char *) p->pack_base + offset;
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if (*delta_chain_length == 0)
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hashcpy(base_sha1, next_sha1);
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offset = find_pack_entry_one(next_sha1, p);
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break;
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}
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offset = unpack_object_header(p, offset, &kind, &val);
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(*delta_chain_length)++;
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}
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switch (kind) {
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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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break;
|
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default:
|
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die("corrupted pack file %s containing object of kind %d",
|
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p->pack_name, kind);
|
||||
}
|
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*store_size = 0; /* notyet */
|
||||
}
|
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|
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static int packed_object_info(struct pack_entry *entry,
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static int packed_object_info(struct packed_git *p, unsigned long offset,
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char *type, unsigned long *sizep)
|
||||
{
|
||||
struct packed_git *p = entry->p;
|
||||
unsigned long offset, size, left;
|
||||
unsigned char *pack;
|
||||
unsigned long size;
|
||||
enum object_type kind;
|
||||
int retval;
|
||||
|
||||
if (use_packed_git(p))
|
||||
die("cannot map packed file");
|
||||
offset = unpack_object_header(p, offset, &kind, &size);
|
||||
|
||||
offset = unpack_object_header(p, entry->offset, &kind, &size);
|
||||
pack = (unsigned char *) p->pack_base + offset;
|
||||
left = p->pack_size - offset;
|
||||
if (kind == OBJ_DELTA)
|
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return packed_delta_info(p, offset, type, sizep);
|
||||
|
||||
switch (kind) {
|
||||
case OBJ_DELTA:
|
||||
retval = packed_delta_info(pack, size, left, type, sizep, p);
|
||||
unuse_packed_git(p);
|
||||
return retval;
|
||||
case OBJ_COMMIT:
|
||||
case OBJ_TREE:
|
||||
case OBJ_BLOB:
|
||||
|
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@ -1066,7 +1050,6 @@ static int packed_object_info(struct pack_entry *entry,
|
|||
}
|
||||
if (sizep)
|
||||
*sizep = size;
|
||||
unuse_packed_git(p);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
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@ -1103,25 +1086,26 @@ static void *unpack_delta_entry(struct packed_git *p,
|
|||
char *type,
|
||||
unsigned long *sizep)
|
||||
{
|
||||
struct pack_entry base_ent;
|
||||
void *delta_data, *result, *base;
|
||||
unsigned long result_size, base_size;
|
||||
unsigned char* base_sha1;
|
||||
unsigned long result_size, base_size, base_offset;
|
||||
unsigned char *base_sha1;
|
||||
|
||||
if ((offset + 20) >= p->pack_size)
|
||||
if (p->pack_size < offset + 20)
|
||||
die("truncated pack file");
|
||||
|
||||
/* The base entry _must_ be in the same pack */
|
||||
base_sha1 = (unsigned char*)p->pack_base + offset;
|
||||
if (!find_pack_entry_one(base_sha1, &base_ent, p))
|
||||
base_offset = find_pack_entry_one(base_sha1, p);
|
||||
if (!base_offset)
|
||||
die("failed to find delta-pack base object %s",
|
||||
sha1_to_hex(base_sha1));
|
||||
base = unpack_entry_gently(&base_ent, type, &base_size);
|
||||
if (!base)
|
||||
die("failed to read delta-pack base object %s",
|
||||
sha1_to_hex(base_sha1));
|
||||
offset += 20;
|
||||
|
||||
delta_data = unpack_compressed_entry(p, offset + 20, delta_size);
|
||||
base = unpack_entry_gently(p, base_offset, type, &base_size);
|
||||
if (!base)
|
||||
die("failed to read delta base object at %lu from %s",
|
||||
base_offset, p->pack_name);
|
||||
|
||||
delta_data = unpack_compressed_entry(p, offset, delta_size);
|
||||
result = patch_delta(base, base_size,
|
||||
delta_data, delta_size,
|
||||
&result_size);
|
||||
|
|
@ -1141,7 +1125,7 @@ static void *unpack_entry(struct pack_entry *entry,
|
|||
|
||||
if (use_packed_git(p))
|
||||
die("cannot map packed file");
|
||||
retval = unpack_entry_gently(entry, type, sizep);
|
||||
retval = unpack_entry_gently(p, entry->offset, type, sizep);
|
||||
unuse_packed_git(p);
|
||||
if (!retval)
|
||||
die("corrupted pack file %s", p->pack_name);
|
||||
|
|
@ -1149,14 +1133,13 @@ static void *unpack_entry(struct pack_entry *entry,
|
|||
}
|
||||
|
||||
/* The caller is responsible for use_packed_git()/unuse_packed_git() pair */
|
||||
void *unpack_entry_gently(struct pack_entry *entry,
|
||||
void *unpack_entry_gently(struct packed_git *p, unsigned long offset,
|
||||
char *type, unsigned long *sizep)
|
||||
{
|
||||
struct packed_git *p = entry->p;
|
||||
unsigned long offset, size;
|
||||
unsigned long size;
|
||||
enum object_type kind;
|
||||
|
||||
offset = unpack_object_header(p, entry->offset, &kind, &size);
|
||||
offset = unpack_object_header(p, offset, &kind, &size);
|
||||
switch (kind) {
|
||||
case OBJ_DELTA:
|
||||
return unpack_delta_entry(p, offset, size, type, sizep);
|
||||
|
|
@ -1188,8 +1171,8 @@ int nth_packed_object_sha1(const struct packed_git *p, int n,
|
|||
return 0;
|
||||
}
|
||||
|
||||
int find_pack_entry_one(const unsigned char *sha1,
|
||||
struct pack_entry *e, struct packed_git *p)
|
||||
unsigned long find_pack_entry_one(const unsigned char *sha1,
|
||||
struct packed_git *p)
|
||||
{
|
||||
unsigned int *level1_ofs = p->index_base;
|
||||
int hi = ntohl(level1_ofs[*sha1]);
|
||||
|
|
@ -1199,12 +1182,8 @@ int find_pack_entry_one(const unsigned char *sha1,
|
|||
do {
|
||||
int mi = (lo + hi) / 2;
|
||||
int cmp = hashcmp((unsigned char *)index + (24 * mi) + 4, sha1);
|
||||
if (!cmp) {
|
||||
e->offset = ntohl(*((unsigned int *) ((char *) index + (24 * mi))));
|
||||
hashcpy(e->sha1, sha1);
|
||||
e->p = p;
|
||||
return 1;
|
||||
}
|
||||
if (!cmp)
|
||||
return ntohl(*((unsigned int *) ((char *) index + (24 * mi))));
|
||||
if (cmp > 0)
|
||||
hi = mi;
|
||||
else
|
||||
|
|
@ -1216,6 +1195,8 @@ int find_pack_entry_one(const unsigned char *sha1,
|
|||
static int find_pack_entry(const unsigned char *sha1, struct pack_entry *e, const char **ignore_packed)
|
||||
{
|
||||
struct packed_git *p;
|
||||
unsigned long offset;
|
||||
|
||||
prepare_packed_git();
|
||||
|
||||
for (p = packed_git; p; p = p->next) {
|
||||
|
|
@ -1227,8 +1208,13 @@ static int find_pack_entry(const unsigned char *sha1, struct pack_entry *e, cons
|
|||
if (*ig)
|
||||
continue;
|
||||
}
|
||||
if (find_pack_entry_one(sha1, e, p))
|
||||
offset = find_pack_entry_one(sha1, p);
|
||||
if (offset) {
|
||||
e->offset = offset;
|
||||
e->p = p;
|
||||
hashcpy(e->sha1, sha1);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1237,10 +1223,9 @@ struct packed_git *find_sha1_pack(const unsigned char *sha1,
|
|||
struct packed_git *packs)
|
||||
{
|
||||
struct packed_git *p;
|
||||
struct pack_entry e;
|
||||
|
||||
for (p = packs; p; p = p->next) {
|
||||
if (find_pack_entry_one(sha1, &e, p))
|
||||
if (find_pack_entry_one(sha1, p))
|
||||
return p;
|
||||
}
|
||||
return NULL;
|
||||
|
|
@ -1259,12 +1244,16 @@ int sha1_object_info(const unsigned char *sha1, char *type, unsigned long *sizep
|
|||
if (!map) {
|
||||
struct pack_entry e;
|
||||
|
||||
if (find_pack_entry(sha1, &e, NULL))
|
||||
return packed_object_info(&e, type, sizep);
|
||||
reprepare_packed_git();
|
||||
if (find_pack_entry(sha1, &e, NULL))
|
||||
return packed_object_info(&e, type, sizep);
|
||||
return error("unable to find %s", sha1_to_hex(sha1));
|
||||
if (!find_pack_entry(sha1, &e, NULL)) {
|
||||
reprepare_packed_git();
|
||||
if (!find_pack_entry(sha1, &e, NULL))
|
||||
return error("unable to find %s", sha1_to_hex(sha1));
|
||||
}
|
||||
if (use_packed_git(e.p))
|
||||
die("cannot map packed file");
|
||||
status = packed_object_info(e.p, e.offset, type, sizep);
|
||||
unuse_packed_git(e.p);
|
||||
return status;
|
||||
}
|
||||
if (unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0)
|
||||
status = error("unable to unpack %s header",
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче