1 files changed, 0 insertions, 379 deletions
diff --git a/third_party/git/pack-write.c b/third_party/git/pack-write.c
deleted file mode 100644
index 29d17a9bec..0000000000
--- a/third_party/git/pack-write.c
+++ /dev/null
@@ -1,379 +0,0 @@
-#include "cache.h"
-#include "pack.h"
-#include "csum-file.h"
-
-void reset_pack_idx_option(struct pack_idx_option *opts)
-{
-	memset(opts, 0, sizeof(*opts));
-	opts->version = 2;
-	opts->off32_limit = 0x7fffffff;
-}
-
-static int sha1_compare(const void *_a, const void *_b)
-{
-	struct pack_idx_entry *a = *(struct pack_idx_entry **)_a;
-	struct pack_idx_entry *b = *(struct pack_idx_entry **)_b;
-	return oidcmp(&a->oid, &b->oid);
-}
-
-static int cmp_uint32(const void *a_, const void *b_)
-{
-	uint32_t a = *((uint32_t *)a_);
-	uint32_t b = *((uint32_t *)b_);
-
-	return (a < b) ? -1 : (a != b);
-}
-
-static int need_large_offset(off_t offset, const struct pack_idx_option *opts)
-{
-	uint32_t ofsval;
-
-	if ((offset >> 31) || (opts->off32_limit < offset))
-		return 1;
-	if (!opts->anomaly_nr)
-		return 0;
-	ofsval = offset;
-	return !!bsearch(&ofsval, opts->anomaly, opts->anomaly_nr,
-			 sizeof(ofsval), cmp_uint32);
-}
-
-/*
- * On entry *sha1 contains the pack content SHA1 hash, on exit it is
- * the SHA1 hash of sorted object names. The objects array passed in
- * will be sorted by SHA1 on exit.
- */
-const char *write_idx_file(const char *index_name, struct pack_idx_entry **objects,
-			   int nr_objects, const struct pack_idx_option *opts,
-			   const unsigned char *sha1)
-{
-	struct hashfile *f;
-	struct pack_idx_entry **sorted_by_sha, **list, **last;
-	off_t last_obj_offset = 0;
-	uint32_t array[256];
-	int i, fd;
-	uint32_t index_version;
-
-	if (nr_objects) {
-		sorted_by_sha = objects;
-		list = sorted_by_sha;
-		last = sorted_by_sha + nr_objects;
-		for (i = 0; i < nr_objects; ++i) {
-			if (objects[i]->offset > last_obj_offset)
-				last_obj_offset = objects[i]->offset;
-		}
-		QSORT(sorted_by_sha, nr_objects, sha1_compare);
-	}
-	else
-		sorted_by_sha = list = last = NULL;
-
-	if (opts->flags & WRITE_IDX_VERIFY) {
-		assert(index_name);
-		f = hashfd_check(index_name);
-	} else {
-		if (!index_name) {
-			struct strbuf tmp_file = STRBUF_INIT;
-			fd = odb_mkstemp(&tmp_file, "pack/tmp_idx_XXXXXX");
-			index_name = strbuf_detach(&tmp_file, NULL);
-		} else {
-			unlink(index_name);
-			fd = open(index_name, O_CREAT|O_EXCL|O_WRONLY, 0600);
-			if (fd < 0)
-				die_errno("unable to create '%s'", index_name);
-		}
-		f = hashfd(fd, index_name);
-	}
-
-	/* if last object's offset is >= 2^31 we should use index V2 */
-	index_version = need_large_offset(last_obj_offset, opts) ? 2 : opts->version;
-
-	/* 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);
-		hashwrite(f, &hdr, sizeof(hdr));
-	}
-
-	/*
-	 * Write the first-level table (the list is sorted,
-	 * but we use a 256-entry lookup to be able to avoid
-	 * having to do eight extra binary search iterations).
-	 */
-	for (i = 0; i < 256; i++) {
-		struct pack_idx_entry **next = list;
-		while (next < last) {
-			struct pack_idx_entry *obj = *next;
-			if (obj->oid.hash[0] != i)
-				break;
-			next++;
-		}
-		array[i] = htonl(next - sorted_by_sha);
-		list = next;
-	}
-	hashwrite(f, array, 256 * 4);
-
-	/*
-	 * Write the actual SHA1 entries..
-	 */
-	list = sorted_by_sha;
-	for (i = 0; i < nr_objects; i++) {
-		struct pack_idx_entry *obj = *list++;
-		if (index_version < 2) {
-			uint32_t offset = htonl(obj->offset);
-			hashwrite(f, &offset, 4);
-		}
-		hashwrite(f, obj->oid.hash, the_hash_algo->rawsz);
-		if ((opts->flags & WRITE_IDX_STRICT) &&
-		    (i && oideq(&list[-2]->oid, &obj->oid)))
-			die("The same object %s appears twice in the pack",
-			    oid_to_hex(&obj->oid));
-	}
-
-	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 pack_idx_entry *obj = *list++;
-			uint32_t crc32_val = htonl(obj->crc32);
-			hashwrite(f, &crc32_val, 4);
-		}
-
-		/* write the 32-bit offset table */
-		list = sorted_by_sha;
-		for (i = 0; i < nr_objects; i++) {
-			struct pack_idx_entry *obj = *list++;
-			uint32_t offset;
-
-			offset = (need_large_offset(obj->offset, opts)
-				  ? (0x80000000 | nr_large_offset++)
-				  : obj->offset);
-			offset = htonl(offset);
-			hashwrite(f, &offset, 4);
-		}
-
-		/* write the large offset table */
-		list = sorted_by_sha;
-		while (nr_large_offset) {
-			struct pack_idx_entry *obj = *list++;
-			uint64_t offset = obj->offset;
-			uint32_t split[2];
-
-			if (!need_large_offset(offset, opts))
-				continue;
-			split[0] = htonl(offset >> 32);
-			split[1] = htonl(offset & 0xffffffff);
-			hashwrite(f, split, 8);
-			nr_large_offset--;
-		}
-	}
-
-	hashwrite(f, sha1, the_hash_algo->rawsz);
-	finalize_hashfile(f, NULL, CSUM_HASH_IN_STREAM | CSUM_CLOSE |
-				    ((opts->flags & WRITE_IDX_VERIFY)
-				    ? 0 : CSUM_FSYNC));
-	return index_name;
-}
-
-off_t write_pack_header(struct hashfile *f, uint32_t nr_entries)
-{
-	struct pack_header hdr;
-
-	hdr.hdr_signature = htonl(PACK_SIGNATURE);
-	hdr.hdr_version = htonl(PACK_VERSION);
-	hdr.hdr_entries = htonl(nr_entries);
-	hashwrite(f, &hdr, sizeof(hdr));
-	return sizeof(hdr);
-}
-
-/*
- * Update pack header with object_count and compute new SHA1 for pack data
- * associated to pack_fd, and write that SHA1 at the end.  That new SHA1
- * is also returned in new_pack_sha1.
- *
- * If partial_pack_sha1 is non null, then the SHA1 of the existing pack
- * (without the header update) is computed and validated against the
- * one provided in partial_pack_sha1.  The validation is performed at
- * partial_pack_offset bytes in the pack file.  The SHA1 of the remaining
- * data (i.e. from partial_pack_offset to the end) is then computed and
- * returned in partial_pack_sha1.
- *
- * Note that new_pack_sha1 is updated last, so both new_pack_sha1 and
- * partial_pack_sha1 can refer to the same buffer if the caller is not
- * interested in the resulting SHA1 of pack data above partial_pack_offset.
- */
-void fixup_pack_header_footer(int pack_fd,
-			 unsigned char *new_pack_hash,
-			 const char *pack_name,
-			 uint32_t object_count,
-			 unsigned char *partial_pack_hash,
-			 off_t partial_pack_offset)
-{
-	int aligned_sz, buf_sz = 8 * 1024;
-	git_hash_ctx old_hash_ctx, new_hash_ctx;
-	struct pack_header hdr;
-	char *buf;
-	ssize_t read_result;
-
-	the_hash_algo->init_fn(&old_hash_ctx);
-	the_hash_algo->init_fn(&new_hash_ctx);
-
-	if (lseek(pack_fd, 0, SEEK_SET) != 0)
-		die_errno("Failed seeking to start of '%s'", pack_name);
-	read_result = read_in_full(pack_fd, &hdr, sizeof(hdr));
-	if (read_result < 0)
-		die_errno("Unable to reread header of '%s'", pack_name);
-	else if (read_result != sizeof(hdr))
-		die_errno("Unexpected short read for header of '%s'",
-			  pack_name);
-	if (lseek(pack_fd, 0, SEEK_SET) != 0)
-		die_errno("Failed seeking to start of '%s'", pack_name);
-	the_hash_algo->update_fn(&old_hash_ctx, &hdr, sizeof(hdr));
-	hdr.hdr_entries = htonl(object_count);
-	the_hash_algo->update_fn(&new_hash_ctx, &hdr, sizeof(hdr));
-	write_or_die(pack_fd, &hdr, sizeof(hdr));
-	partial_pack_offset -= sizeof(hdr);
-
-	buf = xmalloc(buf_sz);
-	aligned_sz = buf_sz - sizeof(hdr);
-	for (;;) {
-		ssize_t m, n;
-		m = (partial_pack_hash && partial_pack_offset < aligned_sz) ?
-			partial_pack_offset : aligned_sz;
-		n = xread(pack_fd, buf, m);
-		if (!n)
-			break;
-		if (n < 0)
-			die_errno("Failed to checksum '%s'", pack_name);
-		the_hash_algo->update_fn(&new_hash_ctx, buf, n);
-
-		aligned_sz -= n;
-		if (!aligned_sz)
-			aligned_sz = buf_sz;
-
-		if (!partial_pack_hash)
-			continue;
-
-		the_hash_algo->update_fn(&old_hash_ctx, buf, n);
-		partial_pack_offset -= n;
-		if (partial_pack_offset == 0) {
-			unsigned char hash[GIT_MAX_RAWSZ];
-			the_hash_algo->final_fn(hash, &old_hash_ctx);
-			if (!hasheq(hash, partial_pack_hash))
-				die("Unexpected checksum for %s "
-				    "(disk corruption?)", pack_name);
-			/*
-			 * Now let's compute the SHA1 of the remainder of the
-			 * pack, which also means making partial_pack_offset
-			 * big enough not to matter anymore.
-			 */
-			the_hash_algo->init_fn(&old_hash_ctx);
-			partial_pack_offset = ~partial_pack_offset;
-			partial_pack_offset -= MSB(partial_pack_offset, 1);
-		}
-	}
-	free(buf);
-
-	if (partial_pack_hash)
-		the_hash_algo->final_fn(partial_pack_hash, &old_hash_ctx);
-	the_hash_algo->final_fn(new_pack_hash, &new_hash_ctx);
-	write_or_die(pack_fd, new_pack_hash, the_hash_algo->rawsz);
-	fsync_or_die(pack_fd, pack_name);
-}
-
-char *index_pack_lockfile(int ip_out)
-{
-	char packname[GIT_MAX_HEXSZ + 6];
-	const int len = the_hash_algo->hexsz + 6;
-
-	/*
-	 * The first thing we expect from index-pack's output
-	 * is "pack\t%40s\n" or "keep\t%40s\n" (46 bytes) where
-	 * %40s is the newly created pack SHA1 name.  In the "keep"
-	 * case, we need it to remove the corresponding .keep file
-	 * later on.  If we don't get that then tough luck with it.
-	 */
-	if (read_in_full(ip_out, packname, len) == len && packname[len-1] == '\n') {
-		const char *name;
-		packname[len-1] = 0;
-		if (skip_prefix(packname, "keep\t", &name))
-			return xstrfmt("%s/pack/pack-%s.keep",
-				       get_object_directory(), name);
-	}
-	return NULL;
-}
-
-/*
- * The per-object header is a pretty dense thing, which is
- *  - first byte: low four bits are "size", then three bits of "type",
- *    and the high bit is "size continues".
- *  - each byte afterwards: low seven bits are size continuation,
- *    with the high bit being "size continues"
- */
-int encode_in_pack_object_header(unsigned char *hdr, int hdr_len,
-				 enum object_type type, uintmax_t size)
-{
-	int n = 1;
-	unsigned char c;
-
-	if (type < OBJ_COMMIT || type > OBJ_REF_DELTA)
-		die("bad type %d", type);
-
-	c = (type << 4) | (size & 15);
-	size >>= 4;
-	while (size) {
-		if (n == hdr_len)
-			die("object size is too enormous to format");
-		*hdr++ = c | 0x80;
-		c = size & 0x7f;
-		size >>= 7;
-		n++;
-	}
-	*hdr = c;
-	return n;
-}
-
-struct hashfile *create_tmp_packfile(char **pack_tmp_name)
-{
-	struct strbuf tmpname = STRBUF_INIT;
-	int fd;
-
-	fd = odb_mkstemp(&tmpname, "pack/tmp_pack_XXXXXX");
-	*pack_tmp_name = strbuf_detach(&tmpname, NULL);
-	return hashfd(fd, *pack_tmp_name);
-}
-
-void finish_tmp_packfile(struct strbuf *name_buffer,
-			 const char *pack_tmp_name,
-			 struct pack_idx_entry **written_list,
-			 uint32_t nr_written,
-			 struct pack_idx_option *pack_idx_opts,
-			 unsigned char sha1[])
-{
-	const char *idx_tmp_name;
-	int basename_len = name_buffer->len;
-
-	if (adjust_shared_perm(pack_tmp_name))
-		die_errno("unable to make temporary pack file readable");
-
-	idx_tmp_name = write_idx_file(NULL, written_list, nr_written,
-				      pack_idx_opts, sha1);
-	if (adjust_shared_perm(idx_tmp_name))
-		die_errno("unable to make temporary index file readable");
-
-	strbuf_addf(name_buffer, "%s.pack", sha1_to_hex(sha1));
-
-	if (rename(pack_tmp_name, name_buffer->buf))
-		die_errno("unable to rename temporary pack file");
-
-	strbuf_setlen(name_buffer, basename_len);
-
-	strbuf_addf(name_buffer, "%s.idx", sha1_to_hex(sha1));
-	if (rename(idx_tmp_name, name_buffer->buf))
-		die_errno("unable to rename temporary index file");
-
-	strbuf_setlen(name_buffer, basename_len);
-
-	free((void *)idx_tmp_name);
-}