sha1_file: convert index_path and index_fd to struct object_id

Convert these two functions and the functions that underlie them to take
pointers to struct object_id.  This is a prerequisite to convert
resolve_gitlink_ref.  Fix a stray tab in the middle of the index_mem
call in index_pipe by converting it to a space.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

sha1_file.c

@@ -1664,7 +1664,7 @@ static void check_tag(const void *buf, size_t size)
 		die("corrupt tag");
 }
 
-static int index_mem(unsigned char *sha1, void *buf, size_t size,
+static int index_mem(struct object_id *oid, void *buf, size_t size,
 		     enum object_type type,
 		     const char *path, unsigned flags)
 {
@@ -1695,15 +1695,15 @@ static int index_mem(unsigned char *sha1, void *buf, size_t size,
 	}
 
 	if (write_object)
-		ret = write_sha1_file(buf, size, typename(type), sha1);
+		ret = write_sha1_file(buf, size, typename(type), oid->hash);
 	else
-		ret = hash_sha1_file(buf, size, typename(type), sha1);
+		ret = hash_sha1_file(buf, size, typename(type), oid->hash);
 	if (re_allocated)
 		free(buf);
 	return ret;
 }
 
-static int index_stream_convert_blob(unsigned char *sha1, int fd,
+static int index_stream_convert_blob(struct object_id *oid, int fd,
 				     const char *path, unsigned flags)
 {
 	int ret;
@@ -1718,22 +1718,22 @@ static int index_stream_convert_blob(unsigned char *sha1, int fd,
 
 	if (write_object)
 		ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				      sha1);
+				      oid->hash);
 	else
 		ret = hash_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
-				     sha1);
+				     oid->hash);
 	strbuf_release(&sbuf);
 	return ret;
 }
 
-static int index_pipe(unsigned char *sha1, int fd, enum object_type type,
+static int index_pipe(struct object_id *oid, int fd, enum object_type type,
 		      const char *path, unsigned flags)
 {
 	struct strbuf sbuf = STRBUF_INIT;
 	int ret;
 
 	if (strbuf_read(&sbuf, fd, 4096) >= 0)
-		ret = index_mem(sha1, sbuf.buf, sbuf.len, type,	path, flags);
+		ret = index_mem(oid, sbuf.buf, sbuf.len, type, path, flags);
 	else
 		ret = -1;
 	strbuf_release(&sbuf);
@@ -1742,14 +1742,14 @@ static int index_pipe(unsigned char *sha1, int fd, enum object_type type,
 
 #define SMALL_FILE_SIZE (32*1024)
 
-static int index_core(unsigned char *sha1, int fd, size_t size,
+static int index_core(struct object_id *oid, int fd, size_t size,
 		      enum object_type type, const char *path,
 		      unsigned flags)
 {
 	int ret;
 
 	if (!size) {
-		ret = index_mem(sha1, "", size, type, path, flags);
+		ret = index_mem(oid, "", size, type, path, flags);
 	} else if (size <= SMALL_FILE_SIZE) {
 		char *buf = xmalloc(size);
 		ssize_t read_result = read_in_full(fd, buf, size);
@@ -1760,11 +1760,11 @@ static int index_core(unsigned char *sha1, int fd, size_t size,
 			ret = error("short read while indexing %s",
 				    path ? path : "<unknown>");
 		else
-			ret = index_mem(sha1, buf, size, type, path, flags);
+			ret = index_mem(oid, buf, size, type, path, flags);
 		free(buf);
 	} else {
 		void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
-		ret = index_mem(sha1, buf, size, type, path, flags);
+		ret = index_mem(oid, buf, size, type, path, flags);
 		munmap(buf, size);
 	}
 	return ret;
@@ -1802,12 +1802,12 @@ int index_fd(struct object_id *oid, int fd, struct stat *st,
 	 * die() for large files.
 	 */
 	if (type == OBJ_BLOB && path && would_convert_to_git_filter_fd(path))
-		ret = index_stream_convert_blob(oid->hash, fd, path, flags);
+		ret = index_stream_convert_blob(oid, fd, path, flags);
 	else if (!S_ISREG(st->st_mode))
-		ret = index_pipe(oid->hash, fd, type, path, flags);
+		ret = index_pipe(oid, fd, type, path, flags);
 	else if (st->st_size <= big_file_threshold || type != OBJ_BLOB ||
 		 (path && would_convert_to_git(&the_index, path)))
-		ret = index_core(oid->hash, fd, xsize_t(st->st_size), type, path,
+		ret = index_core(oid, fd, xsize_t(st->st_size), type, path,
 				 flags);
 	else
 		ret = index_stream(oid, fd, xsize_t(st->st_size), type, path,