diff: convert diff_addremove to struct object_id

Convert diff_addremove to take a struct object_id.  In addtion convert
the function pointer type 'add_remove_fn_t' to also take a struct
object_id.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff-lib.c

@@ -210,14 +210,14 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
 					continue;
 				}
 				diff_addremove(&revs->diffopt, '-', ce->ce_mode,
-					       ce->oid.hash,
+					       &ce->oid,
 					       !is_null_oid(&ce->oid),
 					       ce->name, 0);
 				continue;
 			} else if (revs->diffopt.ita_invisible_in_index &&
 				   ce_intent_to_add(ce)) {
 				diff_addremove(&revs->diffopt, '+', ce->ce_mode,
-					       EMPTY_BLOB_SHA1_BIN, 0,
+					       &empty_tree_oid, 0,
 					       ce->name, 0);
 				continue;
 			}
@@ -260,7 +260,7 @@ static void diff_index_show_file(struct rev_info *revs,
 				 unsigned dirty_submodule)
 {
 	diff_addremove(&revs->diffopt, prefix[0], mode,
-		       oid->hash, oid_valid, ce->name, dirty_submodule);
+		       oid, oid_valid, ce->name, dirty_submodule);
 }
 
 static int get_stat_data(const struct cache_entry *ce,

diff.c

@@ -5081,8 +5081,8 @@ static int is_submodule_ignored(const char *path, struct diff_options *options)
 
 void diff_addremove(struct diff_options *options,
 		    int addremove, unsigned mode,
-		    const unsigned char *sha1,
+		    const struct object_id *oid,
-		    int sha1_valid,
+		    int oid_valid,
 		    const char *concatpath, unsigned dirty_submodule)
 {
 	struct diff_filespec *one, *two;
@@ -5114,9 +5114,9 @@ void diff_addremove(struct diff_options *options,
 	two = alloc_filespec(concatpath);
 
 	if (addremove != '+')
-		fill_filespec(one, sha1, sha1_valid, mode);
+		fill_filespec(one, oid->hash, oid_valid, mode);
 	if (addremove != '-') {
-		fill_filespec(two, sha1, sha1_valid, mode);
+		fill_filespec(two, oid->hash, oid_valid, mode);
 		two->dirty_submodule = dirty_submodule;
 	}
 

diff.h

@@ -31,8 +31,8 @@ typedef void (*change_fn_t)(struct diff_options *options,
 
 typedef void (*add_remove_fn_t)(struct diff_options *options,
 		    int addremove, unsigned mode,
-		    const unsigned char *sha1,
+		    const struct object_id *oid,
-		    int sha1_valid,
+		    int oid_valid,
 		    const char *fullpath, unsigned dirty_submodule);
 
 typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
@@ -247,8 +247,8 @@ extern int diff_can_quit_early(struct diff_options *);
 extern void diff_addremove(struct diff_options *,
 			   int addremove,
 			   unsigned mode,
-			   const unsigned char *sha1,
+			   const struct object_id *oid,
-			   int sha1_valid,
+			   int oid_valid,
 			   const char *fullpath, unsigned dirty_submodule);
 
 extern void diff_change(struct diff_options *,

revision.c

@@ -401,8 +401,8 @@ static int tree_difference = REV_TREE_SAME;
 
 static void file_add_remove(struct diff_options *options,
 		    int addremove, unsigned mode,
-		    const unsigned char *sha1,
+		    const struct object_id *oid,
-		    int sha1_valid,
+		    int oid_valid,
 		    const char *fullpath, unsigned dirty_submodule)
 {
 	int diff = addremove == '+' ? REV_TREE_NEW : REV_TREE_OLD;

tree-diff.c

@@ -78,21 +78,21 @@ static int emit_diff_first_parent_only(struct diff_options *opt, struct combine_
 			1, 1, p->path, 0, 0);
 	}
 	else {
-		const unsigned char *sha1;
+		const struct object_id *oid;
 		unsigned int mode;
 		int addremove;
 
 		if (p->mode) {
 			addremove = '+';
-			sha1 = p->oid.hash;
+			oid = &p->oid;
 			mode = p->mode;
 		} else {
 			addremove = '-';
-			sha1 = p0->oid.hash;
+			oid = &p0->oid;
 			mode = p0->mode;
 		}
 
-		opt->add_remove(opt, addremove, mode, sha1, 1, p->path, 0);
+		opt->add_remove(opt, addremove, mode, oid, 1, p->path, 0);
 	}
 
 	return 0;	/* we are done with p */