return 1;
}
-void unuse_packed_git(struct packed_git *p)
+void unuse_pack(struct pack_window **w_cursor)
{
- if (p->windows)
- p->windows->inuse_cnt--;
+ struct pack_window *w = *w_cursor;
+ if (w) {
+ w->inuse_cnt--;
+ *w_cursor = NULL;
+ }
}
static void open_packed_git(struct packed_git *p)
die("packfile %s does not match index", p->pack_name);
}
-int use_packed_git(struct packed_git *p)
+unsigned char* use_pack(struct packed_git *p,
+ struct pack_window **w_cursor,
+ unsigned long offset,
+ unsigned int *left)
{
+ struct pack_window *win = p->windows;
+
if (p->pack_fd == -1)
open_packed_git(p);
- if (!p->windows) {
- struct pack_window *win;
-
+ if (!win) {
pack_mapped += p->pack_size;
while (packed_git_limit < pack_mapped && unuse_one_packed_git())
; /* nothing */
die("packfile %s cannot be mapped.", p->pack_name);
p->windows = win;
}
- p->windows->last_used = pack_used_ctr++;
- p->windows->inuse_cnt++;
- return 0;
+ if (win != *w_cursor) {
+ win->last_used = pack_used_ctr++;
+ win->inuse_cnt++;
+ *w_cursor = win;
+ }
+ if (left)
+ *left = win->len - offset;
+ return win->base + offset;
}
struct packed_git *add_packed_git(char *path, int path_len, int local)
}
static unsigned long get_delta_base(struct packed_git *p,
+ struct pack_window **w_curs,
unsigned long offset,
enum object_type kind,
unsigned long delta_obj_offset,
unsigned long *base_obj_offset)
{
- unsigned char *base_info = p->windows->base + offset;
+ unsigned char *base_info = use_pack(p, w_curs, offset, NULL);
unsigned long base_offset;
/* there must be at least 20 bytes left regardless of delta type */
char *type, unsigned long *sizep);
static int packed_delta_info(struct packed_git *p,
+ struct pack_window **w_curs,
unsigned long offset,
enum object_type kind,
unsigned long obj_offset,
{
unsigned long base_offset;
- offset = get_delta_base(p, offset, kind, obj_offset, &base_offset);
+ offset = get_delta_base(p, w_curs, offset, kind,
+ obj_offset, &base_offset);
/* We choose to only get the type of the base object and
* ignore potentially corrupt pack file that expects the delta
memset(&stream, 0, sizeof(stream));
- stream.next_in = p->windows->base + offset;
- stream.avail_in = p->pack_size - offset;
+ stream.next_in = use_pack(p, w_curs, offset, &stream.avail_in);
stream.next_out = delta_head;
stream.avail_out = sizeof(delta_head);
return 0;
}
-static unsigned long unpack_object_header(struct packed_git *p, unsigned long offset,
- enum object_type *type, unsigned long *sizep)
+static unsigned long unpack_object_header(struct packed_git *p,
+ struct pack_window **w_curs,
+ unsigned long offset,
+ enum object_type *type,
+ unsigned long *sizep)
{
+ unsigned char *base;
+ unsigned int left;
unsigned long used;
- if (p->pack_size <= offset)
- die("object offset outside of pack file");
-
- used = unpack_object_header_gently(p->windows->base + offset,
- p->pack_size - offset, type, sizep);
+ base = use_pack(p, w_curs, offset, &left);
+ used = unpack_object_header_gently(base, left, type, sizep);
if (!used)
die("object offset outside of pack file");
unsigned int *delta_chain_length,
unsigned char *base_sha1)
{
+ struct pack_window *w_curs = NULL;
unsigned long obj_offset, val;
unsigned char *next_sha1;
enum object_type kind;
*delta_chain_length = 0;
obj_offset = offset;
- offset = unpack_object_header(p, offset, &kind, size);
+ offset = unpack_object_header(p, &w_curs, offset, &kind, size);
for (;;) {
switch (kind) {
case OBJ_TAG:
strcpy(type, type_names[kind]);
*store_size = 0; /* notyet */
+ unuse_pack(&w_curs);
return;
case OBJ_OFS_DELTA:
- get_delta_base(p, offset, kind, obj_offset, &offset);
+ get_delta_base(p, &w_curs, offset, kind,
+ obj_offset, &offset);
if (*delta_chain_length == 0) {
/* TODO: find base_sha1 as pointed by offset */
}
break;
case OBJ_REF_DELTA:
- if (p->pack_size <= offset + 20)
- die("pack file %s records an incomplete delta base",
- p->pack_name);
- next_sha1 = p->windows->base + offset;
+ next_sha1 = use_pack(p, &w_curs, offset, NULL);
if (*delta_chain_length == 0)
hashcpy(base_sha1, next_sha1);
offset = find_pack_entry_one(next_sha1, p);
break;
}
obj_offset = offset;
- offset = unpack_object_header(p, offset, &kind, &val);
+ offset = unpack_object_header(p, &w_curs, offset, &kind, &val);
(*delta_chain_length)++;
}
}
static int packed_object_info(struct packed_git *p, unsigned long offset,
char *type, unsigned long *sizep)
{
+ struct pack_window *w_curs = NULL;
unsigned long size, obj_offset = offset;
enum object_type kind;
+ int r;
- offset = unpack_object_header(p, offset, &kind, &size);
+ offset = unpack_object_header(p, &w_curs, offset, &kind, &size);
switch (kind) {
case OBJ_OFS_DELTA:
case OBJ_REF_DELTA:
- return packed_delta_info(p, offset, kind, obj_offset, type, sizep);
+ r = packed_delta_info(p, &w_curs, offset, kind,
+ obj_offset, type, sizep);
+ unuse_pack(&w_curs);
+ return r;
case OBJ_COMMIT:
case OBJ_TREE:
case OBJ_BLOB:
case OBJ_TAG:
strcpy(type, type_names[kind]);
+ unuse_pack(&w_curs);
break;
default:
die("pack %s contains unknown object type %d",
}
static void *unpack_compressed_entry(struct packed_git *p,
+ struct pack_window **w_curs,
unsigned long offset,
unsigned long size)
{
buffer = xmalloc(size + 1);
buffer[size] = 0;
memset(&stream, 0, sizeof(stream));
- stream.next_in = p->windows->base + offset;
- stream.avail_in = p->pack_size - offset;
+ stream.next_in = use_pack(p, w_curs, offset, &stream.avail_in);
stream.next_out = buffer;
stream.avail_out = size;
}
static void *unpack_delta_entry(struct packed_git *p,
+ struct pack_window **w_curs,
unsigned long offset,
unsigned long delta_size,
enum object_type kind,
void *delta_data, *result, *base;
unsigned long result_size, base_size, base_offset;
- offset = get_delta_base(p, offset, kind, obj_offset, &base_offset);
+ offset = get_delta_base(p, w_curs, offset, kind,
+ obj_offset, &base_offset);
base = unpack_entry(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);
+ delta_data = unpack_compressed_entry(p, w_curs, offset, delta_size);
result = patch_delta(base, base_size,
delta_data, delta_size,
&result_size);
void *unpack_entry(struct packed_git *p, unsigned long offset,
char *type, unsigned long *sizep)
{
+ struct pack_window *w_curs = NULL;
unsigned long size, obj_offset = offset;
enum object_type kind;
void *retval;
- if (use_packed_git(p))
- die("cannot map packed file");
- offset = unpack_object_header(p, offset, &kind, &size);
+ offset = unpack_object_header(p, &w_curs, offset, &kind, &size);
switch (kind) {
case OBJ_OFS_DELTA:
case OBJ_REF_DELTA:
- retval = unpack_delta_entry(p, offset, size, kind, obj_offset, type, sizep);
+ retval = unpack_delta_entry(p, &w_curs, offset, size,
+ kind, obj_offset, type, sizep);
break;
case OBJ_COMMIT:
case OBJ_TREE:
case OBJ_TAG:
strcpy(type, type_names[kind]);
*sizep = size;
- retval = unpack_compressed_entry(p, offset, size);
+ retval = unpack_compressed_entry(p, &w_curs, offset, size);
break;
default:
die("unknown object type %i in %s", kind, p->pack_name);
}
- unuse_packed_git(p);
+ unuse_pack(&w_curs);
return retval;
}
int sha1_object_info(const unsigned char *sha1, char *type, unsigned long *sizep)
{
- int status;
struct pack_entry e;
if (!find_pack_entry(sha1, &e, NULL)) {
if (!find_pack_entry(sha1, &e, NULL))
return sha1_loose_object_info(sha1, type, sizep);
}
- 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;
+ return packed_object_info(e.p, e.offset, type, sizep);
}
static void *read_packed_sha1(const unsigned char *sha1, char *type, unsigned long *size)