#include "commit.h"
#include "tag.h"
#include "tree.h"
-
-#include <sys/time.h>
+#include "progress.h"
static int dry_run, quiet, recover, has_errors;
static const char unpack_usage[] = "git-unpack-objects [-n] [-q] [-r] < pack-file";
/* We always read in 4kB chunks. */
static unsigned char buffer[4096];
-static unsigned long offset, len, consumed_bytes;
+static unsigned int offset, len;
+static off_t consumed_bytes;
static SHA_CTX ctx;
/*
* Make sure at least "min" bytes are available in the buffer, and
* return the pointer to the buffer.
*/
-static void * fill(int min)
+static void *fill(int min)
{
if (min <= len)
return buffer + offset;
die("cannot fill %d bytes", min);
if (offset) {
SHA1_Update(&ctx, buffer, offset);
- memcpy(buffer, buffer + offset, len);
+ memmove(buffer, buffer + offset, len);
offset = 0;
}
do {
- int ret = xread(0, buffer + len, sizeof(buffer) - len);
+ ssize_t ret = xread(0, buffer + len, sizeof(buffer) - len);
if (ret <= 0) {
if (!ret)
die("early EOF");
die("used more bytes than were available");
len -= bytes;
offset += bytes;
+
+ /* make sure off_t is sufficiently large not to wrap */
+ if (consumed_bytes > consumed_bytes + bytes)
+ die("pack too large for current definition of off_t");
consumed_bytes += bytes;
}
struct delta_info {
unsigned char base_sha1[20];
- unsigned long base_offset;
+ unsigned nr;
+ off_t base_offset;
unsigned long size;
void *delta;
- unsigned nr;
struct delta_info *next;
};
static struct delta_info *delta_list;
static void add_delta_to_list(unsigned nr, unsigned const char *base_sha1,
- unsigned long base_offset,
+ off_t base_offset,
void *delta, unsigned long size)
{
struct delta_info *info = xmalloc(sizeof(*info));
}
struct obj_info {
- unsigned long offset;
+ off_t offset;
unsigned char sha1[20];
};
static struct obj_info *obj_list;
-static void added_object(unsigned nr, const char *type, void *data,
- unsigned long size);
+static void added_object(unsigned nr, enum object_type type,
+ void *data, unsigned long size);
-static void write_object(unsigned nr, void *buf, unsigned long size,
- const char *type)
+static void write_object(unsigned nr, enum object_type type,
+ void *buf, unsigned long size)
{
- if (write_sha1_file(buf, size, type, obj_list[nr].sha1) < 0)
+ if (write_sha1_file(buf, size, typename(type), obj_list[nr].sha1) < 0)
die("failed to write object");
added_object(nr, type, buf, size);
}
-static void resolve_delta(unsigned nr, const char *type,
+static void resolve_delta(unsigned nr, enum object_type type,
void *base, unsigned long base_size,
void *delta, unsigned long delta_size)
{
if (!result)
die("failed to apply delta");
free(delta);
- write_object(nr, result, result_size, type);
+ write_object(nr, type, result, result_size);
free(result);
}
-static void added_object(unsigned nr, const char *type, void *data,
- unsigned long size)
+static void added_object(unsigned nr, enum object_type type,
+ void *data, unsigned long size)
{
struct delta_info **p = &delta_list;
struct delta_info *info;
}
}
-static void unpack_non_delta_entry(enum object_type kind, unsigned long size,
+static void unpack_non_delta_entry(enum object_type type, unsigned long size,
unsigned nr)
{
void *buf = get_data(size);
- const char *type;
-
- switch (kind) {
- case OBJ_COMMIT: type = commit_type; break;
- case OBJ_TREE: type = tree_type; break;
- case OBJ_BLOB: type = blob_type; break;
- case OBJ_TAG: type = tag_type; break;
- default: die("bad type %d", kind);
- }
+
if (!dry_run && buf)
- write_object(nr, buf, size, type);
+ write_object(nr, type, buf, size);
free(buf);
}
-static void unpack_delta_entry(enum object_type kind, unsigned long delta_size,
+static void unpack_delta_entry(enum object_type type, unsigned long delta_size,
unsigned nr)
{
void *delta_data, *base;
unsigned long base_size;
- char type[20];
unsigned char base_sha1[20];
- if (kind == OBJ_REF_DELTA) {
+ if (type == OBJ_REF_DELTA) {
hashcpy(base_sha1, fill(20));
use(20);
delta_data = get_data(delta_size);
} else {
unsigned base_found = 0;
unsigned char *pack, c;
- unsigned long base_offset;
+ off_t base_offset;
unsigned lo, mid, hi;
pack = fill(1);
base_offset = c & 127;
while (c & 128) {
base_offset += 1;
- if (!base_offset || base_offset & ~(~0UL >> 7))
+ if (!base_offset || MSB(base_offset, 7))
die("offset value overflow for delta base object");
pack = fill(1);
c = *pack;
}
}
- base = read_sha1_file(base_sha1, type, &base_size);
+ base = read_sha1_file(base_sha1, &type, &base_size);
if (!base) {
error("failed to read delta-pack base object %s",
sha1_to_hex(base_sha1));
free(base);
}
-static void unpack_one(unsigned nr, unsigned total)
+static void unpack_one(unsigned nr)
{
unsigned shift;
unsigned char *pack, c;
size += (c & 0x7f) << shift;
shift += 7;
}
- if (!quiet) {
- static unsigned long last_sec;
- static unsigned last_percent;
- struct timeval now;
- unsigned percentage = ((nr+1) * 100) / total;
-
- gettimeofday(&now, NULL);
- if (percentage != last_percent || now.tv_sec != last_sec) {
- last_sec = now.tv_sec;
- last_percent = percentage;
- fprintf(stderr, "%4u%% (%u/%u) done\r",
- percentage, (nr+1), total);
- }
- }
+
switch (type) {
case OBJ_COMMIT:
case OBJ_TREE:
static void unpack_all(void)
{
int i;
+ struct progress progress;
struct pack_header *hdr = fill(sizeof(struct pack_header));
unsigned nr_objects = ntohl(hdr->hdr_entries);
die("bad pack file");
if (!pack_version_ok(hdr->hdr_version))
die("unknown pack file version %d", ntohl(hdr->hdr_version));
- fprintf(stderr, "Unpacking %d objects\n", nr_objects);
+ use(sizeof(struct pack_header));
+ if (!quiet)
+ start_progress(&progress, "Unpacking objects", nr_objects);
obj_list = xmalloc(nr_objects * sizeof(*obj_list));
- use(sizeof(struct pack_header));
- for (i = 0; i < nr_objects; i++)
- unpack_one(i, nr_objects);
+ for (i = 0; i < nr_objects; i++) {
+ unpack_one(i);
+ if (!quiet)
+ display_progress(&progress, i + 1);
+ }
+ if (!quiet)
+ stop_progress(&progress);
+
if (delta_list)
die("unresolved deltas left after unpacking");
}
recover = 1;
continue;
}
+ if (!prefixcmp(arg, "--pack_header=")) {
+ struct pack_header *hdr;
+ char *c;
+
+ hdr = (struct pack_header *)buffer;
+ hdr->hdr_signature = htonl(PACK_SIGNATURE);
+ hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10));
+ if (*c != ',')
+ die("bad %s", arg);
+ hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10));
+ if (*c)
+ die("bad %s", arg);
+ len = sizeof(*hdr);
+ continue;
+ }
usage(unpack_usage);
}
}
/* All done */
- if (!quiet)
- fprintf(stderr, "\n");
return has_errors;
}