int i;
const char *index = p->index_data;
- index += 4 * 256;
rix->revindex = xmalloc(sizeof(*rix->revindex) * (num_ent + 1));
- for (i = 0; i < num_ent; i++) {
- uint32_t hl = *((uint32_t *)(index + 24 * i));
- rix->revindex[i].offset = ntohl(hl);
- rix->revindex[i].nr = i;
+ index += 4 * 256;
+
+ if (p->index_version > 1) {
+ const uint32_t *off_32 =
+ (uint32_t *)(index + 8 + p->num_objects * (20 + 4));
+ const uint32_t *off_64 = off_32 + p->num_objects;
+ for (i = 0; i < num_ent; i++) {
+ uint32_t off = ntohl(*off_32++);
+ if (!(off & 0x80000000)) {
+ rix->revindex[i].offset = off;
+ } else {
+ rix->revindex[i].offset =
+ ((uint64_t)ntohl(*off_64++)) << 32;
+ rix->revindex[i].offset |=
+ ntohl(*off_64++);
+ }
+ rix->revindex[i].nr = i;
+ }
+ } else {
+ for (i = 0; i < num_ent; i++) {
+ uint32_t hl = *((uint32_t *)(index + 24 * i));
+ rix->revindex[i].offset = ntohl(hl);
+ rix->revindex[i].nr = i;
+ }
}
+
/* This knows the pack format -- the 20-byte trailer
* follows immediately after the last object data.
*/
return offset + size;
}
-static void write_pack_file(void)
+static off_t write_pack_file(void)
{
uint32_t i;
struct sha1file *f;
- off_t offset;
+ off_t offset, last_obj_offset = 0;
struct pack_header hdr;
unsigned last_percent = 999;
int do_progress = progress;
if (!nr_result)
goto done;
for (i = 0; i < nr_objects; i++) {
+ last_obj_offset = offset;
offset = write_one(f, objects + i, offset);
if (do_progress) {
unsigned percent = written * 100 / nr_result;
if (written != nr_result)
die("wrote %u objects while expecting %u", written, nr_result);
sha1close(f, pack_file_sha1, 1);
+
+ return last_obj_offset;
}
-static void write_index_file(void)
+static void write_index_file(off_t last_obj_offset)
{
uint32_t i;
struct sha1file *f = sha1create("%s-%s.%s", base_name,
struct object_entry **list = sorted_by_sha;
struct object_entry **last = list + nr_result;
uint32_t array[256];
+ uint32_t index_version;
+
+ /* if last object's offset is >= 2^31 we should use index V2 */
+ index_version = (last_obj_offset >> 31) ? 2 : 1;
+
+ /* index versions 2 and above need a header */
+ if (index_version >= 2) {
+ struct pack_idx_header hdr;
+ hdr.idx_signature = htonl(PACK_IDX_SIGNATURE);
+ hdr.idx_version = htonl(index_version);
+ sha1write(f, &hdr, sizeof(hdr));
+ }
/*
* Write the first-level table (the list is sorted,
list = sorted_by_sha;
for (i = 0; i < nr_result; i++) {
struct object_entry *entry = *list++;
- uint32_t offset = htonl(entry->offset);
- sha1write(f, &offset, 4);
+ if (index_version < 2) {
+ uint32_t offset = htonl(entry->offset);
+ sha1write(f, &offset, 4);
+ }
sha1write(f, entry->sha1, 20);
}
+
+ if (index_version >= 2) {
+ unsigned int nr_large_offset = 0;
+
+ /* write the crc32 table */
+ list = sorted_by_sha;
+ for (i = 0; i < nr_objects; i++) {
+ struct object_entry *entry = *list++;
+ uint32_t crc32_val = htonl(entry->crc32);
+ sha1write(f, &crc32_val, 4);
+ }
+
+ /* write the 32-bit offset table */
+ list = sorted_by_sha;
+ for (i = 0; i < nr_objects; i++) {
+ struct object_entry *entry = *list++;
+ uint32_t offset = (entry->offset <= 0x7fffffff) ?
+ entry->offset : (0x80000000 | nr_large_offset++);
+ offset = htonl(offset);
+ sha1write(f, &offset, 4);
+ }
+
+ /* write the large offset table */
+ list = sorted_by_sha;
+ while (nr_large_offset) {
+ struct object_entry *entry = *list++;
+ uint64_t offset = entry->offset;
+ if (offset > 0x7fffffff) {
+ uint32_t split[2];
+ split[0] = htonl(offset >> 32);
+ split[1] = htonl(offset & 0xffffffff);
+ sha1write(f, split, 8);
+ nr_large_offset--;
+ }
+ }
+ }
+
sha1write(f, pack_file_sha1, 20);
sha1close(f, NULL, 1);
}
if (reuse_cached_pack(object_list_sha1))
;
else {
+ off_t last_obj_offset;
if (nr_result)
prepare_pack(window, depth);
if (progress == 1 && pack_to_stdout) {
signal(SIGALRM, SIG_IGN );
progress_update = 0;
}
- write_pack_file();
+ last_obj_offset = write_pack_file();
if (!pack_to_stdout) {
- write_index_file();
+ write_index_file(last_obj_offset);
puts(sha1_to_hex(object_list_sha1));
}
}