[PATCH 02/10] diffcore-rename: add functions for clearing dir_rename_count

["Elijah Newren via GitGitGadget" <gitgitgadget@gmail.com>]

From: Elijah Newren <newren@gmail.com>

As we adjust the usage of dir_rename_count we want to have functions for
clearing, or partially clearing it out.  Add such functions.

Signed-off-by: Elijah Newren <newren@gmail.com>
---
 diffcore-rename.c | 19 +++++++++++++++++++
 diffcore.h        |  2 ++
 merge-ort.c       | 12 +++---------
 3 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/diffcore-rename.c b/diffcore-rename.c
index 33cfc5848611..614a8d63012d 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -486,6 +486,25 @@ static void compute_dir_rename_counts(struct strmap *dir_rename_count,
 	}
 }
 
+void partial_clear_dir_rename_count(struct strmap *dir_rename_count)
+{
+	struct hashmap_iter iter;
+	struct strmap_entry *entry;
+
+	strmap_for_each_entry(dir_rename_count, &iter, entry) {
+		struct strintmap *counts = entry->value;
+		strintmap_clear(counts);
+	}
+	strmap_partial_clear(dir_rename_count, 1);
+}
+
+MAYBE_UNUSED
+static void clear_dir_rename_count(struct strmap *dir_rename_count)
+{
+	partial_clear_dir_rename_count(dir_rename_count);
+	strmap_clear(dir_rename_count, 1);
+}
+
 static const char *get_basename(const char *filename)
 {
 	/*
diff --git a/diffcore.h b/diffcore.h
index db55d3853071..c6ba64abd198 100644
--- a/diffcore.h
+++ b/diffcore.h
@@ -161,6 +161,8 @@ struct diff_filepair *diff_queue(struct diff_queue_struct *,
 				 struct diff_filespec *);
 void diff_q(struct diff_queue_struct *, struct diff_filepair *);
 
+void partial_clear_dir_rename_count(struct strmap *dir_rename_count);
+
 void diffcore_break(struct repository *, int);
 void diffcore_rename(struct diff_options *);
 void diffcore_rename_extended(struct diff_options *options,
diff --git a/merge-ort.c b/merge-ort.c
index c4467e073b45..467404cc0a35 100644
--- a/merge-ort.c
+++ b/merge-ort.c
@@ -351,17 +351,11 @@ static void clear_or_reinit_internal_opts(struct merge_options_internal *opti,
 
 	/* Free memory used by various renames maps */
 	for (i = MERGE_SIDE1; i <= MERGE_SIDE2; ++i) {
-		struct hashmap_iter iter;
-		struct strmap_entry *entry;
-
 		strset_func(&renames->dirs_removed[i]);
 
-		strmap_for_each_entry(&renames->dir_rename_count[i],
-				      &iter, entry) {
-			struct strintmap *counts = entry->value;
-			strintmap_clear(counts);
-		}
-		strmap_func(&renames->dir_rename_count[i], 1);
+		partial_clear_dir_rename_count(&renames->dir_rename_count[i]);
+		if (!reinitialize)
+			strmap_clear(&renames->dir_rename_count[i], 1);
 
 		strmap_func(&renames->dir_renames[i], 0);
 	}
-- 
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