1 files changed, 276 insertions, 226 deletions

diff --git a/sha1_file.c b/sha1_file.c
index 3da70ac650..77ccaab928 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -22,13 +22,18 @@
 #include "pack-revindex.h"
 #include "sha1-lookup.h"
 #include "bulk-checkin.h"
+#include "repository.h"
 #include "streaming.h"
 #include "dir.h"
-#include "mru.h"
 #include "list.h"
 #include "mergesort.h"
 #include "quote.h"
 #include "packfile.h"
+#include "fetch-object.h"
+#include "object-store.h"
+
+/* The maximum size for an object header. */
+#define MAX_HEADER_LEN 32
 
 const unsigned char null_sha1[GIT_MAX_RAWSZ];
 const struct object_id null_oid;
@@ -39,32 +44,32 @@ const struct object_id empty_blob_oid = {
 	EMPTY_BLOB_SHA1_BIN_LITERAL
 };
 
-static void git_hash_sha1_init(void *ctx)
+static void git_hash_sha1_init(git_hash_ctx *ctx)
 {
-	git_SHA1_Init((git_SHA_CTX *)ctx);
+	git_SHA1_Init(&ctx->sha1);
 }
 
-static void git_hash_sha1_update(void *ctx, const void *data, size_t len)
+static void git_hash_sha1_update(git_hash_ctx *ctx, const void *data, size_t len)
 {
-	git_SHA1_Update((git_SHA_CTX *)ctx, data, len);
+	git_SHA1_Update(&ctx->sha1, data, len);
 }
 
-static void git_hash_sha1_final(unsigned char *hash, void *ctx)
+static void git_hash_sha1_final(unsigned char *hash, git_hash_ctx *ctx)
 {
-	git_SHA1_Final(hash, (git_SHA_CTX *)ctx);
+	git_SHA1_Final(hash, &ctx->sha1);
 }
 
-static void git_hash_unknown_init(void *ctx)
+static void git_hash_unknown_init(git_hash_ctx *ctx)
 {
 	die("trying to init unknown hash");
 }
 
-static void git_hash_unknown_update(void *ctx, const void *data, size_t len)
+static void git_hash_unknown_update(git_hash_ctx *ctx, const void *data, size_t len)
 {
 	die("trying to update unknown hash");
 }
 
-static void git_hash_unknown_final(unsigned char *hash, void *ctx)
+static void git_hash_unknown_final(unsigned char *hash, git_hash_ctx *ctx)
 {
 	die("trying to finalize unknown hash");
 }
@@ -75,7 +80,6 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
 		0x00000000,
 		0,
 		0,
-		0,
 		git_hash_unknown_init,
 		git_hash_unknown_update,
 		git_hash_unknown_final,
@@ -86,7 +90,6 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
 		"sha-1",
 		/* "sha1", big-endian */
 		0x73686131,
-		sizeof(git_SHA_CTX),
 		GIT_SHA1_RAWSZ,
 		GIT_SHA1_HEXSZ,
 		git_hash_sha1_init,
@@ -133,14 +136,14 @@ static struct cached_object *find_cached_object(const unsigned char *sha1)
 }
 
 
-static enum safe_crlf get_safe_crlf(unsigned flags)
+static int get_conv_flags(unsigned flags)
 {
 	if (flags & HASH_RENORMALIZE)
-		return SAFE_CRLF_RENORMALIZE;
+		return CONV_EOL_RENORMALIZE;
 	else if (flags & HASH_WRITE_OBJECT)
-		return safe_crlf;
+	  return global_conv_flags_eol;
 	else
-		return SAFE_CRLF_FALSE;
+		return 0;
 }
 
 
@@ -321,15 +324,11 @@ static void fill_sha1_path(struct strbuf *buf, const unsigned char *sha1)
 	}
 }
 
-const char *sha1_file_name(const unsigned char *sha1)
+void sha1_file_name(struct repository *r, struct strbuf *buf, const unsigned char *sha1)
 {
-	static struct strbuf buf = STRBUF_INIT;
-
-	strbuf_reset(&buf);
-	strbuf_addf(&buf, "%s/", get_object_directory());
-
-	fill_sha1_path(&buf, sha1);
-	return buf.buf;
+	strbuf_addstr(buf, r->objects->objectdir);
+	strbuf_addch(buf, '/');
+	fill_sha1_path(buf, sha1);
 }
 
 struct strbuf *alt_scratch_buf(struct alternate_object_database *alt)
@@ -346,13 +345,12 @@ static const char *alt_sha1_path(struct alternate_object_database *alt,
 	return buf->buf;
 }
 
-struct alternate_object_database *alt_odb_list;
-static struct alternate_object_database **alt_odb_tail;
-
 /*
  * Return non-zero iff the path is usable as an alternate object database.
  */
-static int alt_odb_usable(struct strbuf *path, const char *normalized_objdir)
+static int alt_odb_usable(struct raw_object_store *o,
+			  struct strbuf *path,
+			  const char *normalized_objdir)
 {
 	struct alternate_object_database *alt;
 
@@ -368,7 +366,7 @@ static int alt_odb_usable(struct strbuf *path, const char *normalized_objdir)
 	 * Prevent the common mistake of listing the same
 	 * thing twice, or object directory itself.
 	 */
-	for (alt = alt_odb_list; alt; alt = alt->next) {
+	for (alt = o->alt_odb_list; alt; alt = alt->next) {
 		if (!fspathcmp(path->buf, alt->path))
 			return 0;
 	}
@@ -393,9 +391,11 @@ static int alt_odb_usable(struct strbuf *path, const char *normalized_objdir)
  * SHA1, an extra slash for the first level indirection, and the
  * terminating NUL.
  */
-static void read_info_alternates(const char * relative_base, int depth);
-static int link_alt_odb_entry(const char *entry, const char *relative_base,
-	int depth, const char *normalized_objdir)
+static void read_info_alternates(struct repository *r,
+				 const char *relative_base,
+				 int depth);
+static int link_alt_odb_entry(struct repository *r, const char *entry,
+	const char *relative_base, int depth, const char *normalized_objdir)
 {
 	struct alternate_object_database *ent;
 	struct strbuf pathbuf = STRBUF_INIT;
@@ -420,7 +420,7 @@ static int link_alt_odb_entry(const char *entry, const char *relative_base,
 	while (pathbuf.len && pathbuf.buf[pathbuf.len - 1] == '/')
 		strbuf_setlen(&pathbuf, pathbuf.len - 1);
 
-	if (!alt_odb_usable(&pathbuf, normalized_objdir)) {
+	if (!alt_odb_usable(r->objects, &pathbuf, normalized_objdir)) {
 		strbuf_release(&pathbuf);
 		return -1;
 	}
@@ -428,12 +428,12 @@ static int link_alt_odb_entry(const char *entry, const char *relative_base,
 	ent = alloc_alt_odb(pathbuf.buf);
 
 	/* add the alternate entry */
-	*alt_odb_tail = ent;
-	alt_odb_tail = &(ent->next);
+	*r->objects->alt_odb_tail = ent;
+	r->objects->alt_odb_tail = &(ent->next);
 	ent->next = NULL;
 
 	/* recursively add alternates */
-	read_info_alternates(pathbuf.buf, depth + 1);
+	read_info_alternates(r, pathbuf.buf, depth + 1);
 
 	strbuf_release(&pathbuf);
 	return 0;
@@ -468,8 +468,8 @@ static const char *parse_alt_odb_entry(const char *string,
 	return end;
 }
 
-static void link_alt_odb_entries(const char *alt, int sep,
-				 const char *relative_base, int depth)
+static void link_alt_odb_entries(struct repository *r, const char *alt,
+				 int sep, const char *relative_base, int depth)
 {
 	struct strbuf objdirbuf = STRBUF_INIT;
 	struct strbuf entry = STRBUF_INIT;
@@ -483,7 +483,7 @@ static void link_alt_odb_entries(const char *alt, int sep,
 		return;
 	}
 
-	strbuf_add_absolute_path(&objdirbuf, get_object_directory());
+	strbuf_add_absolute_path(&objdirbuf, r->objects->objectdir);
 	if (strbuf_normalize_path(&objdirbuf) < 0)
 		die("unable to normalize object directory: %s",
 		    objdirbuf.buf);
@@ -492,13 +492,16 @@ static void link_alt_odb_entries(const char *alt, int sep,
 		alt = parse_alt_odb_entry(alt, sep, &entry);
 		if (!entry.len)
 			continue;
-		link_alt_odb_entry(entry.buf, relative_base, depth, objdirbuf.buf);
+		link_alt_odb_entry(r, entry.buf,
+				   relative_base, depth, objdirbuf.buf);
 	}
 	strbuf_release(&entry);
 	strbuf_release(&objdirbuf);
 }
 
-static void read_info_alternates(const char * relative_base, int depth)
+static void read_info_alternates(struct repository *r,
+				 const char *relative_base,
+				 int depth)
 {
 	char *path;
 	struct strbuf buf = STRBUF_INIT;
@@ -510,7 +513,7 @@ static void read_info_alternates(const char * relative_base, int depth)
 		return;
 	}
 
-	link_alt_odb_entries(buf.buf, '\n', relative_base, depth);
+	link_alt_odb_entries(r, buf.buf, '\n', relative_base, depth);
 	strbuf_release(&buf);
 	free(path);
 }
@@ -563,8 +566,9 @@ void add_to_alternates_file(const char *reference)
 		fprintf_or_die(out, "%s\n", reference);
 		if (commit_lock_file(&lock))
 			die_errno("unable to move new alternates file into place");
-		if (alt_odb_tail)
-			link_alt_odb_entries(reference, '\n', NULL, 0);
+		if (the_repository->objects->alt_odb_tail)
+			link_alt_odb_entries(the_repository, reference,
+					     '\n', NULL, 0);
 	}
 	free(alts);
 }
@@ -575,9 +579,10 @@ void add_to_alternates_memory(const char *reference)
 	 * Make sure alternates are initialized, or else our entry may be
 	 * overwritten when they are.
 	 */
-	prepare_alt_odb();
+	prepare_alt_odb(the_repository);
 
-	link_alt_odb_entries(reference, '\n', NULL, 0);
+	link_alt_odb_entries(the_repository, reference,
+			     '\n', NULL, 0);
 }
 
 /*
@@ -660,8 +665,8 @@ int foreach_alt_odb(alt_odb_fn fn, void *cb)
 	struct alternate_object_database *ent;
 	int r = 0;
 
-	prepare_alt_odb();
-	for (ent = alt_odb_list; ent; ent = ent->next) {
+	prepare_alt_odb(the_repository);
+	for (ent = the_repository->objects->alt_odb_list; ent; ent = ent->next) {
 		r = fn(ent, cb);
 		if (r)
 			break;
@@ -669,19 +674,15 @@ int foreach_alt_odb(alt_odb_fn fn, void *cb)
 	return r;
 }
 
-void prepare_alt_odb(void)
+void prepare_alt_odb(struct repository *r)
 {
-	const char *alt;
-
-	if (alt_odb_tail)
+	if (r->objects->alt_odb_tail)
 		return;
 
-	alt = getenv(ALTERNATE_DB_ENVIRONMENT);
-
-	alt_odb_tail = &alt_odb_list;
-	link_alt_odb_entries(alt, PATH_SEP, NULL, 0);
+	r->objects->alt_odb_tail = &r->objects->alt_odb_list;
+	link_alt_odb_entries(r, r->objects->alternate_db, PATH_SEP, NULL, 0);
 
-	read_info_alternates(get_object_directory(), 0);
+	read_info_alternates(r, r->objects->objectdir, 0);
 }
 
 /* Returns 1 if we have successfully freshened the file, 0 otherwise. */
@@ -710,14 +711,19 @@ int check_and_freshen_file(const char *fn, int freshen)
 
 static int check_and_freshen_local(const unsigned char *sha1, int freshen)
 {
-	return check_and_freshen_file(sha1_file_name(sha1), freshen);
+	static struct strbuf buf = STRBUF_INIT;
+
+	strbuf_reset(&buf);
+	sha1_file_name(the_repository, &buf, sha1);
+
+	return check_and_freshen_file(buf.buf, freshen);
 }
 
 static int check_and_freshen_nonlocal(const unsigned char *sha1, int freshen)
 {
 	struct alternate_object_database *alt;
-	prepare_alt_odb();
-	for (alt = alt_odb_list; alt; alt = alt->next) {
+	prepare_alt_odb(the_repository);
+	for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next) {
 		const char *path = alt_sha1_path(alt, sha1);
 		if (check_and_freshen_file(path, freshen))
 			return 1;
@@ -785,31 +791,31 @@ void *xmmap(void *start, size_t length,
  * With "map" == NULL, try reading the object named with "sha1" using
  * the streaming interface and rehash it to do the same.
  */
-int check_sha1_signature(const unsigned char *sha1, void *map,
-			 unsigned long size, const char *type)
+int check_object_signature(const struct object_id *oid, void *map,
+			   unsigned long size, const char *type)
 {
-	unsigned char real_sha1[20];
+	struct object_id real_oid;
 	enum object_type obj_type;
 	struct git_istream *st;
-	git_SHA_CTX c;
-	char hdr[32];
+	git_hash_ctx c;
+	char hdr[MAX_HEADER_LEN];
 	int hdrlen;
 
 	if (map) {
-		hash_sha1_file(map, size, type, real_sha1);
-		return hashcmp(sha1, real_sha1) ? -1 : 0;
+		hash_object_file(map, size, type, &real_oid);
+		return oidcmp(oid, &real_oid) ? -1 : 0;
 	}
 
-	st = open_istream(sha1, &obj_type, &size, NULL);
+	st = open_istream(oid, &obj_type, &size, NULL);
 	if (!st)
 		return -1;
 
 	/* Generate the header */
-	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(obj_type), size) + 1;
+	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(obj_type), size) + 1;
 
 	/* Sha1.. */
-	git_SHA1_Init(&c);
-	git_SHA1_Update(&c, hdr, hdrlen);
+	the_hash_algo->init_fn(&c);
+	the_hash_algo->update_fn(&c, hdr, hdrlen);
 	for (;;) {
 		char buf[1024 * 16];
 		ssize_t readlen = read_istream(st, buf, sizeof(buf));
@@ -820,11 +826,11 @@ int check_sha1_signature(const unsigned char *sha1, void *map,
 		}
 		if (!readlen)
 			break;
-		git_SHA1_Update(&c, buf, readlen);
+		the_hash_algo->update_fn(&c, buf, readlen);
 	}
-	git_SHA1_Final(real_sha1, &c);
+	the_hash_algo->final_fn(real_oid.hash, &c);
 	close_istream(st);
-	return hashcmp(sha1, real_sha1) ? -1 : 0;
+	return oidcmp(oid, &real_oid) ? -1 : 0;
 }
 
 int git_open_cloexec(const char *name, int flags)
@@ -862,18 +868,22 @@ int git_open_cloexec(const char *name, int flags)
  * Note that it may point to static storage and is only valid until another
  * call to sha1_file_name(), etc.
  */
-static int stat_sha1_file(const unsigned char *sha1, struct stat *st,
-			  const char **path)
+static int stat_sha1_file(struct repository *r, const unsigned char *sha1,
+			  struct stat *st, const char **path)
 {
 	struct alternate_object_database *alt;
+	static struct strbuf buf = STRBUF_INIT;
+
+	strbuf_reset(&buf);
+	sha1_file_name(r, &buf, sha1);
+	*path = buf.buf;
 
-	*path = sha1_file_name(sha1);
 	if (!lstat(*path, st))
 		return 0;
 
-	prepare_alt_odb();
+	prepare_alt_odb(r);
 	errno = ENOENT;
-	for (alt = alt_odb_list; alt; alt = alt->next) {
+	for (alt = r->objects->alt_odb_list; alt; alt = alt->next) {
 		*path = alt_sha1_path(alt, sha1);
 		if (!lstat(*path, st))
 			return 0;
@@ -886,20 +896,25 @@ static int stat_sha1_file(const unsigned char *sha1, struct stat *st,
  * Like stat_sha1_file(), but actually open the object and return the
  * descriptor. See the caveats on the "path" parameter above.
  */
-static int open_sha1_file(const unsigned char *sha1, const char **path)
+static int open_sha1_file(struct repository *r,
+			  const unsigned char *sha1, const char **path)
 {
 	int fd;
 	struct alternate_object_database *alt;
 	int most_interesting_errno;
+	static struct strbuf buf = STRBUF_INIT;
+
+	strbuf_reset(&buf);
+	sha1_file_name(r, &buf, sha1);
+	*path = buf.buf;
 
-	*path = sha1_file_name(sha1);
 	fd = git_open(*path);
 	if (fd >= 0)
 		return fd;
 	most_interesting_errno = errno;
 
-	prepare_alt_odb();
-	for (alt = alt_odb_list; alt; alt = alt->next) {
+	prepare_alt_odb(r);
+	for (alt = r->objects->alt_odb_list; alt; alt = alt->next) {
 		*path = alt_sha1_path(alt, sha1);
 		fd = git_open(*path);
 		if (fd >= 0)
@@ -915,9 +930,8 @@ static int open_sha1_file(const unsigned char *sha1, const char **path)
  * Map the loose object at "path" if it is not NULL, or the path found by
  * searching for a loose object named "sha1".
  */
-static void *map_sha1_file_1(const char *path,
-			     const unsigned char *sha1,
-			     unsigned long *size)
+static void *map_sha1_file_1(struct repository *r, const char *path,
+			     const unsigned char *sha1, unsigned long *size)
 {
 	void *map;
 	int fd;
@@ -925,7 +939,7 @@ static void *map_sha1_file_1(const char *path,
 	if (path)
 		fd = git_open(path);
 	else
-		fd = open_sha1_file(sha1, &path);
+		fd = open_sha1_file(r, sha1, &path);
 	map = NULL;
 	if (fd >= 0) {
 		struct stat st;
@@ -944,9 +958,10 @@ static void *map_sha1_file_1(const char *path,
 	return map;
 }
 
-void *map_sha1_file(const unsigned char *sha1, unsigned long *size)
+void *map_sha1_file(struct repository *r,
+		    const unsigned char *sha1, unsigned long *size)
 {
-	return map_sha1_file_1(NULL, sha1, size);
+	return map_sha1_file_1(r, NULL, sha1, size);
 }
 
 static int unpack_sha1_short_header(git_zstream *stream,
@@ -1087,8 +1102,8 @@ static int parse_sha1_header_extended(const char *hdr, struct object_info *oi,
 	}
 
 	type = type_from_string_gently(type_buf, type_len, 1);
-	if (oi->typename)
-		strbuf_add(oi->typename, type_buf, type_len);
+	if (oi->type_name)
+		strbuf_add(oi->type_name, type_buf, type_len);
 	/*
 	 * Set type to 0 if its an unknown object and
 	 * we're obtaining the type using '--allow-unknown-type'
@@ -1135,15 +1150,15 @@ int parse_sha1_header(const char *hdr, unsigned long *sizep)
 	return parse_sha1_header_extended(hdr, &oi, 0);
 }
 
-static int sha1_loose_object_info(const unsigned char *sha1,
-				  struct object_info *oi,
-				  int flags)
+static int sha1_loose_object_info(struct repository *r,
+				  const unsigned char *sha1,
+				  struct object_info *oi, int flags)
 {
 	int status = 0;
 	unsigned long mapsize;
 	void *map;
 	git_zstream stream;
-	char hdr[32];
+	char hdr[MAX_HEADER_LEN];
 	struct strbuf hdrbuf = STRBUF_INIT;
 	unsigned long size_scratch;
 
@@ -1158,17 +1173,17 @@ static int sha1_loose_object_info(const unsigned char *sha1,
 	 * return value implicitly indicates whether the
 	 * object even exists.
 	 */
-	if (!oi->typep && !oi->typename && !oi->sizep && !oi->contentp) {
+	if (!oi->typep && !oi->type_name && !oi->sizep && !oi->contentp) {
 		const char *path;
 		struct stat st;
-		if (stat_sha1_file(sha1, &st, &path) < 0)
+		if (stat_sha1_file(r, sha1, &st, &path) < 0)
 			return -1;
 		if (oi->disk_sizep)
 			*oi->disk_sizep = st.st_size;
 		return 0;
 	}
 
-	map = map_sha1_file(sha1, &mapsize);
+	map = map_sha1_file(r, sha1, &mapsize);
 	if (!map)
 		return -1;
 
@@ -1213,23 +1228,27 @@ static int sha1_loose_object_info(const unsigned char *sha1,
 	return (status < 0) ? status : 0;
 }
 
-int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi, unsigned flags)
+int fetch_if_missing = 1;
+
+int oid_object_info_extended(const struct object_id *oid, struct object_info *oi, unsigned flags)
 {
 	static struct object_info blank_oi = OBJECT_INFO_INIT;
 	struct pack_entry e;
 	int rtype;
-	const unsigned char *real = (flags & OBJECT_INFO_LOOKUP_REPLACE) ?
-				    lookup_replace_object(sha1) :
-				    sha1;
+	const struct object_id *real = oid;
+	int already_retried = 0;
+
+	if (flags & OBJECT_INFO_LOOKUP_REPLACE)
+		real = lookup_replace_object(oid);
 
-	if (is_null_sha1(real))
+	if (is_null_oid(real))
 		return -1;
 
 	if (!oi)
 		oi = &blank_oi;
 
 	if (!(flags & OBJECT_INFO_SKIP_CACHED)) {
-		struct cached_object *co = find_cached_object(real);
+		struct cached_object *co = find_cached_object(real->hash);
 		if (co) {
 			if (oi->typep)
 				*(oi->typep) = co->type;
@@ -1239,8 +1258,8 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi,
 				*(oi->disk_sizep) = 0;
 			if (oi->delta_base_sha1)
 				hashclr(oi->delta_base_sha1);
-			if (oi->typename)
-				strbuf_addstr(oi->typename, typename(co->type));
+			if (oi->type_name)
+				strbuf_addstr(oi->type_name, type_name(co->type));
 			if (oi->contentp)
 				*oi->contentp = xmemdupz(co->buf, co->size);
 			oi->whence = OI_CACHED;
@@ -1248,19 +1267,37 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi,
 		}
 	}
 
-	if (!find_pack_entry(real, &e)) {
+	while (1) {
+		if (find_pack_entry(the_repository, real->hash, &e))
+			break;
+
+		if (flags & OBJECT_INFO_IGNORE_LOOSE)
+			return -1;
+
 		/* Most likely it's a loose object. */
-		if (!sha1_loose_object_info(real, oi, flags))
+		if (!sha1_loose_object_info(the_repository, real->hash, oi, flags))
 			return 0;
 
 		/* Not a loose object; someone else may have just packed it. */
-		if (flags & OBJECT_INFO_QUICK) {
-			return -1;
-		} else {
-			reprepare_packed_git();
-			if (!find_pack_entry(real, &e))
-				return -1;
+		if (!(flags & OBJECT_INFO_QUICK)) {
+			reprepare_packed_git(the_repository);
+			if (find_pack_entry(the_repository, real->hash, &e))
+				break;
+		}
+
+		/* Check if it is a missing object */
+		if (fetch_if_missing && repository_format_partial_clone &&
+		    !already_retried) {
+			/*
+			 * TODO Investigate haveing fetch_object() return
+			 * TODO error/success and stopping the music here.
+			 */
+			fetch_object(repository_format_partial_clone, real->hash);
+			already_retried = 1;
+			continue;
 		}
+
+		return -1;
 	}
 
 	if (oi == &blank_oi)
@@ -1269,11 +1306,10 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi,
 		 * information below, so return early.
 		 */
 		return 0;
-
 	rtype = packed_object_info(e.p, e.offset, oi);
 	if (rtype < 0) {
-		mark_bad_packed_object(e.p, real);
-		return sha1_object_info_extended(real, oi, 0);
+		mark_bad_packed_object(e.p, real->hash);
+		return oid_object_info_extended(real, oi, 0);
 	} else if (oi->whence == OI_PACKED) {
 		oi->u.packed.offset = e.offset;
 		oi->u.packed.pack = e.p;
@@ -1285,15 +1321,15 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi,
 }
 
 /* returns enum object_type or negative */
-int sha1_object_info(const unsigned char *sha1, unsigned long *sizep)
+int oid_object_info(const struct object_id *oid, unsigned long *sizep)
 {
 	enum object_type type;
 	struct object_info oi = OBJECT_INFO_INIT;
 
 	oi.typep = &type;
 	oi.sizep = sizep;
-	if (sha1_object_info_extended(sha1, &oi,
-				      OBJECT_INFO_LOOKUP_REPLACE) < 0)
+	if (oid_object_info_extended(oid, &oi,
+				     OBJECT_INFO_LOOKUP_REPLACE) < 0)
 		return -1;
 	return type;
 }
@@ -1301,24 +1337,27 @@ int sha1_object_info(const unsigned char *sha1, unsigned long *sizep)
 static void *read_object(const unsigned char *sha1, enum object_type *type,
 			 unsigned long *size)
 {
+	struct object_id oid;
 	struct object_info oi = OBJECT_INFO_INIT;
 	void *content;
 	oi.typep = type;
 	oi.sizep = size;
 	oi.contentp = &content;
 
-	if (sha1_object_info_extended(sha1, &oi, 0) < 0)
+	hashcpy(oid.hash, sha1);
+
+	if (oid_object_info_extended(&oid, &oi, 0) < 0)
 		return NULL;
 	return content;
 }
 
-int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
-		      unsigned char *sha1)
+int pretend_object_file(void *buf, unsigned long len, enum object_type type,
+			struct object_id *oid)
 {
 	struct cached_object *co;
 
-	hash_sha1_file(buf, len, typename(type), sha1);
-	if (has_sha1_file(sha1) || find_cached_object(sha1))
+	hash_object_file(buf, len, type_name(type), oid);
+	if (has_sha1_file(oid->hash) || find_cached_object(oid->hash))
 		return 0;
 	ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc);
 	co = &cached_objects[cached_object_nr++];
@@ -1326,7 +1365,7 @@ int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
 	co->type = type;
 	co->buf = xmalloc(len);
 	memcpy(co->buf, buf, len);
-	hashcpy(co->sha1, sha1);
+	hashcpy(co->sha1, oid->hash);
 	return 0;
 }
 
@@ -1335,65 +1374,65 @@ int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
  * deal with them should arrange to call read_object() and give error
  * messages themselves.
  */
-void *read_sha1_file_extended(const unsigned char *sha1,
-			      enum object_type *type,
-			      unsigned long *size,
-			      int lookup_replace)
+void *read_object_file_extended(const struct object_id *oid,
+				enum object_type *type,
+				unsigned long *size,
+				int lookup_replace)
 {
 	void *data;
 	const struct packed_git *p;
 	const char *path;
 	struct stat st;
-	const unsigned char *repl = lookup_replace ? lookup_replace_object(sha1)
-						   : sha1;
+	const struct object_id *repl = lookup_replace ? lookup_replace_object(oid)
+						      : oid;
 
 	errno = 0;
-	data = read_object(repl, type, size);
+	data = read_object(repl->hash, type, size);
 	if (data)
 		return data;
 
 	if (errno && errno != ENOENT)
-		die_errno("failed to read object %s", sha1_to_hex(sha1));
+		die_errno("failed to read object %s", oid_to_hex(oid));
 
 	/* die if we replaced an object with one that does not exist */
-	if (repl != sha1)
+	if (repl != oid)
 		die("replacement %s not found for %s",
-		    sha1_to_hex(repl), sha1_to_hex(sha1));
+		    oid_to_hex(repl), oid_to_hex(oid));
 
-	if (!stat_sha1_file(repl, &st, &path))
+	if (!stat_sha1_file(the_repository, repl->hash, &st, &path))
 		die("loose object %s (stored in %s) is corrupt",
-		    sha1_to_hex(repl), path);
+		    oid_to_hex(repl), path);
 
-	if ((p = has_packed_and_bad(repl)) != NULL)
+	if ((p = has_packed_and_bad(repl->hash)) != NULL)
 		die("packed object %s (stored in %s) is corrupt",
-		    sha1_to_hex(repl), p->pack_name);
+		    oid_to_hex(repl), p->pack_name);
 
 	return NULL;
 }
 
-void *read_object_with_reference(const unsigned char *sha1,
+void *read_object_with_reference(const struct object_id *oid,
 				 const char *required_type_name,
 				 unsigned long *size,
-				 unsigned char *actual_sha1_return)
+				 struct object_id *actual_oid_return)
 {
 	enum object_type type, required_type;
 	void *buffer;
 	unsigned long isize;
-	unsigned char actual_sha1[20];
+	struct object_id actual_oid;
 
 	required_type = type_from_string(required_type_name);
-	hashcpy(actual_sha1, sha1);
+	oidcpy(&actual_oid, oid);
 	while (1) {
 		int ref_length = -1;
 		const char *ref_type = NULL;
 
-		buffer = read_sha1_file(actual_sha1, &type, &isize);
+		buffer = read_object_file(&actual_oid, &type, &isize);
 		if (!buffer)
 			return NULL;
 		if (type == required_type) {
 			*size = isize;
-			if (actual_sha1_return)
-				hashcpy(actual_sha1_return, actual_sha1);
+			if (actual_oid_return)
+				oidcpy(actual_oid_return, &actual_oid);
 			return buffer;
 		}
 		/* Handle references */
@@ -1407,32 +1446,32 @@ void *read_object_with_reference(const unsigned char *sha1,
 		}
 		ref_length = strlen(ref_type);
 
-		if (ref_length + 40 > isize ||
+		if (ref_length + GIT_SHA1_HEXSZ > isize ||
 		    memcmp(buffer, ref_type, ref_length) ||
-		    get_sha1_hex((char *) buffer + ref_length, actual_sha1)) {
+		    get_oid_hex((char *) buffer + ref_length, &actual_oid)) {
 			free(buffer);
 			return NULL;
 		}
 		free(buffer);
 		/* Now we have the ID of the referred-to object in
-		 * actual_sha1.  Check again. */
+		 * actual_oid.  Check again. */
 	}
 }
 
-static void write_sha1_file_prepare(const void *buf, unsigned long len,
-                                    const char *type, unsigned char *sha1,
-                                    char *hdr, int *hdrlen)
+static void write_object_file_prepare(const void *buf, unsigned long len,
+				      const char *type, struct object_id *oid,
+				      char *hdr, int *hdrlen)
 {
-	git_SHA_CTX c;
+	git_hash_ctx c;
 
 	/* Generate the header */
 	*hdrlen = xsnprintf(hdr, *hdrlen, "%s %lu", type, len)+1;
 
 	/* Sha1.. */
-	git_SHA1_Init(&c);
-	git_SHA1_Update(&c, hdr, *hdrlen);
-	git_SHA1_Update(&c, buf, len);
-	git_SHA1_Final(sha1, &c);
+	the_hash_algo->init_fn(&c);
+	the_hash_algo->update_fn(&c, hdr, *hdrlen);
+	the_hash_algo->update_fn(&c, buf, len);
+	the_hash_algo->final_fn(oid->hash, &c);
 }
 
 /*
@@ -1485,12 +1524,12 @@ static int write_buffer(int fd, const void *buf, size_t len)
 	return 0;
 }
 
-int hash_sha1_file(const void *buf, unsigned long len, const char *type,
-                   unsigned char *sha1)
+int hash_object_file(const void *buf, unsigned long len, const char *type,
+		     struct object_id *oid)
 {
-	char hdr[32];
+	char hdr[MAX_HEADER_LEN];
 	int hdrlen = sizeof(hdr);
-	write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
+	write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
 	return 0;
 }
 
@@ -1548,18 +1587,22 @@ static int create_tmpfile(struct strbuf *tmp, const char *filename)
 	return fd;
 }
 
-static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
-			      const void *buf, unsigned long len, time_t mtime)
+static int write_loose_object(const struct object_id *oid, char *hdr,
+			      int hdrlen, const void *buf, unsigned long len,
+			      time_t mtime)
 {
 	int fd, ret;
 	unsigned char compressed[4096];
 	git_zstream stream;
-	git_SHA_CTX c;
-	unsigned char parano_sha1[20];
+	git_hash_ctx c;
+	struct object_id parano_oid;
 	static struct strbuf tmp_file = STRBUF_INIT;
-	const char *filename = sha1_file_name(sha1);
+	static struct strbuf filename = STRBUF_INIT;
+
+	strbuf_reset(&filename);
+	sha1_file_name(the_repository, &filename, oid->hash);
 
-	fd = create_tmpfile(&tmp_file, filename);
+	fd = create_tmpfile(&tmp_file, filename.buf);
 	if (fd < 0) {
 		if (errno == EACCES)
 			return error("insufficient permission for adding an object to repository database %s", get_object_directory());
@@ -1571,14 +1614,14 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
 	git_deflate_init(&stream, zlib_compression_level);
 	stream.next_out = compressed;
 	stream.avail_out = sizeof(compressed);
-	git_SHA1_Init(&c);
+	the_hash_algo->init_fn(&c);
 
 	/* First header.. */
 	stream.next_in = (unsigned char *)hdr;
 	stream.avail_in = hdrlen;
 	while (git_deflate(&stream, 0) == Z_OK)
 		; /* nothing */
-	git_SHA1_Update(&c, hdr, hdrlen);
+	the_hash_algo->update_fn(&c, hdr, hdrlen);
 
 	/* Then the data itself.. */
 	stream.next_in = (void *)buf;
@@ -1586,7 +1629,7 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
 	do {
 		unsigned char *in0 = stream.next_in;
 		ret = git_deflate(&stream, Z_FINISH);
-		git_SHA1_Update(&c, in0, stream.next_in - in0);
+		the_hash_algo->update_fn(&c, in0, stream.next_in - in0);
 		if (write_buffer(fd, compressed, stream.next_out - compressed) < 0)
 			die("unable to write sha1 file");
 		stream.next_out = compressed;
@@ -1594,13 +1637,16 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
 	} while (ret == Z_OK);
 
 	if (ret != Z_STREAM_END)
-		die("unable to deflate new object %s (%d)", sha1_to_hex(sha1), ret);
+		die("unable to deflate new object %s (%d)", oid_to_hex(oid),
+		    ret);
 	ret = git_deflate_end_gently(&stream);
 	if (ret != Z_OK)
-		die("deflateEnd on object %s failed (%d)", sha1_to_hex(sha1), ret);
-	git_SHA1_Final(parano_sha1, &c);
-	if (hashcmp(sha1, parano_sha1) != 0)
-		die("confused by unstable object source data for %s", sha1_to_hex(sha1));
+		die("deflateEnd on object %s failed (%d)", oid_to_hex(oid),
+		    ret);
+	the_hash_algo->final_fn(parano_oid.hash, &c);
+	if (oidcmp(oid, &parano_oid) != 0)
+		die("confused by unstable object source data for %s",
+		    oid_to_hex(oid));
 
 	close_sha1_file(fd);
 
@@ -1612,7 +1658,7 @@ static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
 			warning_errno("failed utime() on %s", tmp_file.buf);
 	}
 
-	return finalize_object_file(tmp_file.buf, filename);
+	return finalize_object_file(tmp_file.buf, filename.buf);
 }
 
 static int freshen_loose_object(const unsigned char *sha1)
@@ -1623,7 +1669,7 @@ static int freshen_loose_object(const unsigned char *sha1)
 static int freshen_packed_object(const unsigned char *sha1)
 {
 	struct pack_entry e;
-	if (!find_pack_entry(sha1, &e))
+	if (!find_pack_entry(the_repository, sha1, &e))
 		return 0;
 	if (e.p->freshened)
 		return 1;
@@ -1633,58 +1679,60 @@ static int freshen_packed_object(const unsigned char *sha1)
 	return 1;
 }
 
-int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1)
+int write_object_file(const void *buf, unsigned long len, const char *type,
+		      struct object_id *oid)
 {
-	char hdr[32];
+	char hdr[MAX_HEADER_LEN];
 	int hdrlen = sizeof(hdr);
 
 	/* Normally if we have it in the pack then we do not bother writing
 	 * it out into .git/objects/??/?{38} file.
 	 */
-	write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
-	if (freshen_packed_object(sha1) || freshen_loose_object(sha1))
+	write_object_file_prepare(buf, len, type, oid, hdr, &hdrlen);
+	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		return 0;
-	return write_loose_object(sha1, hdr, hdrlen, buf, len, 0);
+	return write_loose_object(oid, hdr, hdrlen, buf, len, 0);
 }
 
-int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type,
-			     struct object_id *oid, unsigned flags)
+int hash_object_file_literally(const void *buf, unsigned long len,
+			       const char *type, struct object_id *oid,
+			       unsigned flags)
 {
 	char *header;
 	int hdrlen, status = 0;
 
 	/* type string, SP, %lu of the length plus NUL must fit this */
-	hdrlen = strlen(type) + 32;
+	hdrlen = strlen(type) + MAX_HEADER_LEN;
 	header = xmalloc(hdrlen);
-	write_sha1_file_prepare(buf, len, type, oid->hash, header, &hdrlen);
+	write_object_file_prepare(buf, len, type, oid, header, &hdrlen);
 
 	if (!(flags & HASH_WRITE_OBJECT))
 		goto cleanup;
 	if (freshen_packed_object(oid->hash) || freshen_loose_object(oid->hash))
 		goto cleanup;
-	status = write_loose_object(oid->hash, header, hdrlen, buf, len, 0);
+	status = write_loose_object(oid, header, hdrlen, buf, len, 0);
 
 cleanup:
 	free(header);
 	return status;
 }
 
-int force_object_loose(const unsigned char *sha1, time_t mtime)
+int force_object_loose(const struct object_id *oid, time_t mtime)
 {
 	void *buf;
 	unsigned long len;
 	enum object_type type;
-	char hdr[32];
+	char hdr[MAX_HEADER_LEN];
 	int hdrlen;
 	int ret;
 
-	if (has_loose_object(sha1))
+	if (has_loose_object(oid->hash))
 		return 0;
-	buf = read_object(sha1, &type, &len);
+	buf = read_object(oid->hash, &type, &len);
 	if (!buf)
-		return error("cannot read sha1_file for %s", sha1_to_hex(sha1));
-	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), len) + 1;
-	ret = write_loose_object(sha1, hdr, hdrlen, buf, len, mtime);
+		return error("cannot read sha1_file for %s", oid_to_hex(oid));
+	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(type), len) + 1;
+	ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime);
 	free(buf);
 
 	return ret;
@@ -1692,10 +1740,12 @@ int force_object_loose(const unsigned char *sha1, time_t mtime)
 
 int has_sha1_file_with_flags(const unsigned char *sha1, int flags)
 {
+	struct object_id oid;
 	if (!startup_info->have_repository)
 		return 0;
-	return sha1_object_info_extended(sha1, NULL,
-					 flags | OBJECT_INFO_SKIP_CACHED) >= 0;
+	hashcpy(oid.hash, sha1);
+	return oid_object_info_extended(&oid, NULL,
+					flags | OBJECT_INFO_SKIP_CACHED) >= 0;
 }
 
 int has_object_file(const struct object_id *oid)
@@ -1752,7 +1802,7 @@ static int index_mem(struct object_id *oid, void *buf, size_t size,
 	if ((type == OBJ_BLOB) && path) {
 		struct strbuf nbuf = STRBUF_INIT;
 		if (convert_to_git(&the_index, path, buf, size, &nbuf,
-				   get_safe_crlf(flags))) {
+				   get_conv_flags(flags))) {
 			buf = strbuf_detach(&nbuf, &size);
 			re_allocated = 1;
 		}
@@ -1767,9 +1817,9 @@ static int index_mem(struct object_id *oid, void *buf, size_t size,
 	}
 
 	if (write_object)
-		ret = write_sha1_file(buf, size, typename(type), oid->hash);
+		ret = write_object_file(buf, size, type_name(type), oid);
 	else
-		ret = hash_sha1_file(buf, size, typename(type), oid->hash);
+		ret = hash_object_file(buf, size, type_name(type), oid);
 	if (re_allocated)
 		free(buf);
 	return ret;
@@ -1786,14 +1836,14 @@ static int index_stream_convert_blob(struct object_id *oid, int fd,
 	assert(would_convert_to_git_filter_fd(path));
 
 	convert_to_git_filter_fd(&the_index, path, fd, &sbuf,
-				 get_safe_crlf(flags));
+				 get_conv_flags(flags));
 
 	if (write_object)
-		ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				      oid->hash);
+		ret = write_object_file(sbuf.buf, sbuf.len, type_name(OBJ_BLOB),
+					oid);
 	else
-		ret = hash_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				     oid->hash);
+		ret = hash_object_file(sbuf.buf, sbuf.len, type_name(OBJ_BLOB),
+				       oid);
 	strbuf_release(&sbuf);
 	return ret;
 }
@@ -1861,7 +1911,7 @@ static int index_stream(struct object_id *oid, int fd, size_t size,
 			enum object_type type, const char *path,
 			unsigned flags)
 {
-	return index_bulk_checkin(oid->hash, fd, size, type, path, flags);
+	return index_bulk_checkin(oid, fd, size, type, path, flags);
 }
 
 int index_fd(struct object_id *oid, int fd, struct stat *st,
@@ -1907,8 +1957,8 @@ int index_path(struct object_id *oid, const char *path, struct stat *st, unsigne
 		if (strbuf_readlink(&sb, path, st->st_size))
 			return error_errno("readlink(\"%s\")", path);
 		if (!(flags & HASH_WRITE_OBJECT))
-			hash_sha1_file(sb.buf, sb.len, blob_type, oid->hash);
-		else if (write_sha1_file(sb.buf, sb.len, blob_type, oid->hash))
+			hash_object_file(sb.buf, sb.len, blob_type, oid);
+		else if (write_object_file(sb.buf, sb.len, blob_type, oid))
 			rc = error("%s: failed to insert into database", path);
 		strbuf_release(&sb);
 		break;
@@ -1935,14 +1985,14 @@ int read_pack_header(int fd, struct pack_header *header)
 	return 0;
 }
 
-void assert_sha1_type(const unsigned char *sha1, enum object_type expect)
+void assert_oid_type(const struct object_id *oid, enum object_type expect)
 {
-	enum object_type type = sha1_object_info(sha1, NULL);
+	enum object_type type = oid_object_info(oid, NULL);
 	if (type < 0)
-		die("%s is not a valid object", sha1_to_hex(sha1));
+		die("%s is not a valid object", oid_to_hex(oid));
 	if (type != expect)
-		die("%s is not a valid '%s' object", sha1_to_hex(sha1),
-		    typename(expect));
+		die("%s is not a valid '%s' object", oid_to_hex(oid),
+		    type_name(expect));
 }
 
 int for_each_file_in_obj_subdir(unsigned int subdir_nr,
@@ -2093,14 +2143,14 @@ static int check_stream_sha1(git_zstream *stream,
 			     const char *path,
 			     const unsigned char *expected_sha1)
 {
-	git_SHA_CTX c;
+	git_hash_ctx c;
 	unsigned char real_sha1[GIT_MAX_RAWSZ];
 	unsigned char buf[4096];
 	unsigned long total_read;
 	int status = Z_OK;
 
-	git_SHA1_Init(&c);
-	git_SHA1_Update(&c, hdr, stream->total_out);
+	the_hash_algo->init_fn(&c);
+	the_hash_algo->update_fn(&c, hdr, stream->total_out);
 
 	/*
 	 * We already read some bytes into hdr, but the ones up to the NUL
@@ -2119,7 +2169,7 @@ static int check_stream_sha1(git_zstream *stream,
 		if (size - total_read < stream->avail_out)
 			stream->avail_out = size - total_read;
 		status = git_inflate(stream, Z_FINISH);
-		git_SHA1_Update(&c, buf, stream->next_out - buf);
+		the_hash_algo->update_fn(&c, buf, stream->next_out - buf);
 		total_read += stream->next_out - buf;
 	}
 	git_inflate_end(stream);
@@ -2134,7 +2184,7 @@ static int check_stream_sha1(git_zstream *stream,
 		return -1;
 	}
 
-	git_SHA1_Final(real_sha1, &c);
+	the_hash_algo->final_fn(real_sha1, &c);
 	if (hashcmp(expected_sha1, real_sha1)) {
 		error("sha1 mismatch for %s (expected %s)", path,
 		      sha1_to_hex(expected_sha1));
@@ -2145,7 +2195,7 @@ static int check_stream_sha1(git_zstream *stream,
 }
 
 int read_loose_object(const char *path,
-		      const unsigned char *expected_sha1,
+		      const struct object_id *expected_oid,
 		      enum object_type *type,
 		      unsigned long *size,
 		      void **contents)
@@ -2154,11 +2204,11 @@ int read_loose_object(const char *path,
 	void *map = NULL;
 	unsigned long mapsize;
 	git_zstream stream;
-	char hdr[32];
+	char hdr[MAX_HEADER_LEN];
 
 	*contents = NULL;
 
-	map = map_sha1_file_1(path, NULL, &mapsize);
+	map = map_sha1_file_1(the_repository, path, NULL, &mapsize);
 	if (!map) {
 		error_errno("unable to mmap %s", path);
 		goto out;
@@ -2177,19 +2227,19 @@ int read_loose_object(const char *path,
 	}
 
 	if (*type == OBJ_BLOB) {
-		if (check_stream_sha1(&stream, hdr, *size, path, expected_sha1) < 0)
+		if (check_stream_sha1(&stream, hdr, *size, path, expected_oid->hash) < 0)
 			goto out;
 	} else {
-		*contents = unpack_sha1_rest(&stream, hdr, *size, expected_sha1);
+		*contents = unpack_sha1_rest(&stream, hdr, *size, expected_oid->hash);
 		if (!*contents) {
 			error("unable to unpack contents of %s", path);
 			git_inflate_end(&stream);
 			goto out;
 		}
-		if (check_sha1_signature(expected_sha1, *contents,
-					 *size, typename(*type))) {
+		if (check_object_signature(expected_oid, *contents,
+					 *size, type_name(*type))) {
 			error("sha1 mismatch for %s (expected %s)", path,
-			      sha1_to_hex(expected_sha1));
+			      oid_to_hex(expected_oid));
 			free(*contents);
 			goto out;
 		}