[PATCH 05/12] vinyl: move vy_tuple_key_contains_null to generic code

[Vladimir Davydov <vdavydov.dev@gmail.com>]

The function doesn't require any knowledge of vinyl statement layout and
can work on regular tuples. Let's rename it to tuple_key_contains_null,
move its implementation to tuple_extract_key.cc, and declare it in
key_def.h, as we do with other similar functions.
---
 src/box/key_def.h            |  9 +++++++++
 src/box/tuple_extract_key.cc | 16 ++++++++++++++++
 src/box/vinyl.c              |  2 +-
 src/box/vy_stmt.h            | 22 ----------------------
 4 files changed, 26 insertions(+), 23 deletions(-)

diff --git a/src/box/key_def.h b/src/box/key_def.h
index 788a200d..dd62f6a3 100644
--- a/src/box/key_def.h
+++ b/src/box/key_def.h
@@ -464,6 +464,15 @@ key_part_cmp(const struct key_part *parts1, uint32_t part_count1,
 	     const struct key_part *parts2, uint32_t part_count2);
 
 /**
+ * Check if a key of @a tuple contains NULL.
+ * @param tuple Tuple to check.
+ * @param def Key def to check by.
+ * @retval Does the key contain NULL or not?
+ */
+bool
+tuple_key_contains_null(const struct tuple *tuple, struct key_def *def);
+
+/**
  * Extract key from tuple by given key definition and return
  * buffer allocated on box_txn_alloc with this key. This function
  * has O(n) complexity, where n is the number of key parts.
diff --git a/src/box/tuple_extract_key.cc b/src/box/tuple_extract_key.cc
index 915b6bae..fead2328 100644
--- a/src/box/tuple_extract_key.cc
+++ b/src/box/tuple_extract_key.cc
@@ -399,3 +399,19 @@ tuple_extract_key_func_set(struct key_def *key_def)
 		}
 	}
 }
+
+bool
+tuple_key_contains_null(const struct tuple *tuple, struct key_def *def)
+{
+	struct tuple_format *format = tuple_format(tuple);
+	const char *data = tuple_data(tuple);
+	const uint32_t *field_map = tuple_field_map(tuple);
+	for (struct key_part *part = def->parts, *end = part + def->part_count;
+	     part < end; ++part) {
+		const char *field =
+			tuple_field_raw_by_part(format, data, field_map, part);
+		if (field == NULL || mp_typeof(*field) == MP_NIL)
+			return true;
+	}
+	return false;
+}
diff --git a/src/box/vinyl.c b/src/box/vinyl.c
index 23c5b9c3..428bae1d 100644
--- a/src/box/vinyl.c
+++ b/src/box/vinyl.c
@@ -1503,7 +1503,7 @@ vy_check_is_unique_secondary(struct vy_tx *tx, const struct vy_read_view **rv,
 	if (!lsm->check_is_unique)
 		return 0;
 	if (lsm->key_def->is_nullable &&
-	    vy_tuple_key_contains_null(stmt, lsm->key_def))
+	    tuple_key_contains_null(stmt, lsm->key_def))
 		return 0;
 	struct tuple *key = vy_stmt_extract_key(stmt, lsm->key_def,
 						lsm->env->key_format);
diff --git a/src/box/vy_stmt.h b/src/box/vy_stmt.h
index dd1f2460..3efad12c 100644
--- a/src/box/vy_stmt.h
+++ b/src/box/vy_stmt.h
@@ -669,28 +669,6 @@ vy_stmt_snprint(char *buf, int size, const struct tuple *stmt);
 const char *
 vy_stmt_str(const struct tuple *stmt);
 
-/**
- * Check if a key of @a tuple contains NULL.
- * @param tuple Tuple to check.
- * @param def Key def to check by.
- * @retval Does the key contain NULL or not?
- */
-static inline bool
-vy_tuple_key_contains_null(const struct tuple *tuple, struct key_def *def)
-{
-	struct tuple_format *format = tuple_format(tuple);
-	const char *data = tuple_data(tuple);
-	const uint32_t *field_map = tuple_field_map(tuple);
-	for (struct key_part *part = def->parts, *end = part + def->part_count;
-	     part < end; ++part) {
-		const char *field =
-			tuple_field_raw_by_part(format, data, field_map, part);
-		if (field == NULL || mp_typeof(*field) == MP_NIL)
-			return true;
-	}
-	return false;
-}
-
 #if defined(__cplusplus)
 } /* extern "C" */
 #endif /* defined(__cplusplus) */
-- 
2.11.0