[Tarantool-patches] [PATCH 2.X v3 1/3] module api: export box_tuple_validate

[Timur Safin <tsafin@tarantool.org>]

For external merger we need means to validate tuple data,
thus exporting `box_tuple_validate` which is wrapper around
`tuple_validate_raw` without revealing access to tuple
internals.

Part of #5384
---
 src/box/tuple.c                  |  6 ++++++
 src/box/tuple.h                  | 11 +++++++++++
 src/exports.h                    |  1 +
 test/app-tap/module_api.c        | 16 ++++++++++++++++
 test/app-tap/module_api.test.lua | 25 ++++++++++++++++++++++++-
 5 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/src/box/tuple.c b/src/box/tuple.c
index f3965476e..6fce4143e 100644
--- a/src/box/tuple.c
+++ b/src/box/tuple.c
@@ -748,6 +748,12 @@ box_tuple_new(box_tuple_format_t *format, const char *data, const char *end)
 	return tuple_bless(ret);
 }
 
+int
+box_tuple_validate(box_tuple_t *tuple, box_tuple_format_t *format)
+{
+	return tuple_validate_raw(format, tuple_data(tuple));
+}
+
 /* }}} box_tuple_* */
 
 int
diff --git a/src/box/tuple.h b/src/box/tuple.h
index 53ae690cc..755aee506 100644
--- a/src/box/tuple.h
+++ b/src/box/tuple.h
@@ -283,6 +283,17 @@ box_tuple_update(box_tuple_t *tuple, const char *expr, const char *expr_end);
 box_tuple_t *
 box_tuple_upsert(box_tuple_t *tuple, const char *expr, const char *expr_end);
 
+/**
+ * Check tuple data correspondence to the space format.
+ * @param tuple  Tuple to validate.
+ * @param format Format to which the tuple must match.
+ *
+ * @retval  0 The tuple is valid.
+ * @retval -1 The tuple is invalid.
+ */
+int
+box_tuple_validate(box_tuple_t *tuple, box_tuple_format_t *format);
+
 /** \endcond public */
 
 /**
diff --git a/src/exports.h b/src/exports.h
index 1d7deb518..051818ef7 100644
--- a/src/exports.h
+++ b/src/exports.h
@@ -78,6 +78,7 @@ EXPORT(box_tuple_to_buf)
 EXPORT(box_tuple_unref)
 EXPORT(box_tuple_update)
 EXPORT(box_tuple_upsert)
+EXPORT(box_tuple_validate)
 EXPORT(box_txn)
 EXPORT(box_txn_alloc)
 EXPORT(box_txn_begin)
diff --git a/test/app-tap/module_api.c b/test/app-tap/module_api.c
index 8b46cdb0d..7d8941bfb 100644
--- a/test/app-tap/module_api.c
+++ b/test/app-tap/module_api.c
@@ -1155,6 +1155,21 @@ test_tuple_new(struct lua_State *L)
 
 /* }}} test_tuple_new */
 
+static int
+test_tuple_validate(lua_State *L)
+{
+	int valid = 0;
+	box_tuple_t *tuple = luaT_istuple(L, -1);
+
+	if (tuple != NULL) {
+		box_tuple_format_t *format = box_tuple_format_default();
+                valid = box_tuple_validate(tuple, format) == 0;
+        }
+	lua_pushboolean(L, valid);
+
+	return 1;
+}
+
 LUA_API int
 luaopen_module_api(lua_State *L)
 {
@@ -1190,6 +1205,7 @@ luaopen_module_api(lua_State *L)
 		{"test_key_def_new_v2", test_key_def_new_v2},
 		{"test_key_def_dump_parts", test_key_def_dump_parts},
 		{"test_key_def_validate_tuple", test_key_def_validate_tuple},
+		{"tuple_validate", test_tuple_validate},
 		{NULL, NULL}
 	};
 	luaL_register(L, "module_api", lib);
diff --git a/test/app-tap/module_api.test.lua b/test/app-tap/module_api.test.lua
index cfb0ca00b..6797f8150 100755
--- a/test/app-tap/module_api.test.lua
+++ b/test/app-tap/module_api.test.lua
@@ -38,6 +38,28 @@ local function test_pushcdata(test, module)
     test:is(gc_counter, 1, 'pushcdata gc')
 end
 
+local function test_tuples(test, module)
+    test:plan(8)
+
+    local nottuple1 = {}
+    local nottuple2 = {1, 2}
+    local nottuple3 = {1, nil, 2}
+    local nottuple4 = {1, box.NULL, 2, 3}
+    local tuple1 = box.tuple.new(nottuple1)
+    local tuple2 = box.tuple.new(nottuple2)
+    local tuple3 = box.tuple.new(nottuple3)
+    local tuple4 = box.tuple.new(nottuple4)
+
+    test:ok(not module.tuple_validate(nottuple1), "not tuple 1")
+    test:ok(not module.tuple_validate(nottuple2), "not tuple 2")
+    test:ok(not module.tuple_validate(nottuple3), "not tuple 3")
+    test:ok(not module.tuple_validate(nottuple4), "not tuple 4")
+    test:ok(module.tuple_validate(tuple1), "tuple 1")
+    test:ok(module.tuple_validate(tuple2), "tuple 2")
+    test:ok(module.tuple_validate(tuple3), "tuple 3")
+    test:ok(module.tuple_validate(tuple4), "tuple 4")
+end
+
 local function test_iscallable(test, module)
     local ffi = require('ffi')
 
@@ -172,7 +194,7 @@ local function test_iscdata(test, module)
 end
 
 local test = require('tap').test("module_api", function(test)
-    test:plan(31)
+    test:plan(32)
     local status, module = pcall(require, 'module_api')
     test:is(status, true, "module")
     test:ok(status, "module is loaded")
@@ -199,6 +221,7 @@ local test = require('tap').test("module_api", function(test)
     test:test("pushcdata", test_pushcdata, module)
     test:test("iscallable", test_iscallable, module)
     test:test("iscdata", test_iscdata, module)
+    test:test("validate", test_tuples, module)
 
     space:drop()
 end)
-- 
2.20.1