[PATCH v4 29/29] tree-walk.h API: add a tree_entry_extract_type() function

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Add and use a tree_entry_extract_type() function. There were callers
of tree_entry_extract() which didn't care about the mode, but just the
type in the tree entry.

In emit_path() the "mode" variable was not used after the "isdir"
assignment, as can be seen in the diff with it being set to 0.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
 match-trees.c | 12 ++++++------
 tree-diff.c   |  5 +++--
 tree-walk.h   | 11 +++++++++++
 3 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/match-trees.c b/match-trees.c
index 25bfb46fb02..89109659aa3 100644
--- a/match-trees.c
+++ b/match-trees.c
@@ -143,11 +143,11 @@ static void match_trees(const struct object_id *hash1,
 	while (one.size) {
 		const char *path;
 		const struct object_id *elem;
-		unsigned short mode;
+		enum object_type object_type;
 		int score;
 
-		elem = tree_entry_extract_mode(&one, &path, &mode);
-		if (!S_ISDIR(mode))
+		elem = tree_entry_extract_type(&one, &path, &object_type);
+		if (object_type != OBJ_TREE)
 			goto next;
 		score = score_trees(elem, hash2);
 		if (*best_score < score) {
@@ -198,14 +198,14 @@ static int splice_tree(const struct object_id *oid1, const char *prefix,
 
 	rewrite_here = NULL;
 	while (desc.size) {
+		enum object_type object_type;
 		const char *name;
-		unsigned short mode;
 		int len = tree_entry_len(&desc.entry);
 
-		tree_entry_extract_mode(&desc, &name, &mode);
+		tree_entry_extract_type(&desc, &name, &object_type);
 		if (len == toplen &&
 		    !memcmp(name, prefix, toplen)) {
-			if (!S_ISDIR(mode))
+			if (object_type != OBJ_TREE)
 				die("entry %s in tree %s is not a tree", name,
 				    oid_to_hex(oid1));
 
diff --git a/tree-diff.c b/tree-diff.c
index 918ad95fa61..8409374f0ba 100644
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -208,10 +208,11 @@ static struct combine_diff_path *emit_path(struct combine_diff_path *p,
 		 * 1) all modes for tp[i]=tp[imin] should be the same wrt
 		 *    S_ISDIR, thanks to base_name_compare().
 		 */
-		tree_entry_extract_mode(&tp[imin], &path, &mode);
+		enum object_type object_type;
+		tree_entry_extract_type(&tp[imin], &path, &object_type);
 		pathlen = tree_entry_len(&tp[imin].entry);
 
-		isdir = S_ISDIR(mode);
+		isdir = object_type == OBJ_TREE;
 		oid = NULL;
 		mode = 0;
 	}
diff --git a/tree-walk.h b/tree-walk.h
index efcd7ccd10e..f5102ed5427 100644
--- a/tree-walk.h
+++ b/tree-walk.h
@@ -47,6 +47,7 @@ struct tree_desc {
  * appropriate variable to fill in (NULL won't do!):
  *
  * tree_entry_extract_mode(): const char *path, unsigned int mode
+ * tree_entry_extract_type(): const char *path, enum object_type
  * tree_entry_extract_all(): const char *path, unsigned int mode, enum object_type
  */
 static inline const struct object_id *tree_entry_extract_mode(struct tree_desc *desc,
@@ -58,6 +59,16 @@ static inline const struct object_id *tree_entry_extract_mode(struct tree_desc *
 	return &desc->entry.oid;
 }
 
+static inline const struct object_id *tree_entry_extract_type(struct tree_desc *desc,
+							      const char **pathp,
+							      enum object_type *object_typep)
+{
+	*pathp = desc->entry.path;
+	*object_typep = desc->entry.object_type;
+	return &desc->entry.oid;
+}
+
+
 static inline const struct object_id *tree_entry_extract_all(struct tree_desc *desc,
 							     const char **pathp,
 							     unsigned short *modep,
-- 
2.31.0.286.gc175f2cb894




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