schema helpers CHANGE return code and message

The 'lysp_check_dup_typedef' function has as unified return code and
message with similar 'lysp_check_dup_identities' and
'lysp_check_dup_features' functions.
diff --git a/src/tree_schema_helpers.c b/src/tree_schema_helpers.c
index 8c16672..3b510aa 100644
--- a/src/tree_schema_helpers.c
+++ b/src/tree_schema_helpers.c
@@ -353,8 +353,8 @@
  * @param[in] node Schema node where the type is being defined, NULL in case of a top-level typedef.
  * @param[in] tpdf Typedef definition to check.
  * @param[in,out] tpdfs_global Initialized hash table to store temporary data between calls. When the module's
- *            typedefs are checked, caller is supposed to free the table.
- * @return LY_EEXIST in case of collision, LY_SUCCESS otherwise.
+ * typedefs are checked, caller is supposed to free the table.
+ * @return LY_EVALID in case of collision, LY_SUCCESS otherwise.
  */
 static LY_ERR
 lysp_check_dup_typedef(struct lys_parser_ctx *ctx, struct lysp_node *node, const struct lysp_tpdf *tpdf,
@@ -374,8 +374,9 @@
     name_len = strlen(name);
 
     if (lysp_type_str2builtin(name, name_len)) {
-        LOGVAL_PARSER(ctx, LYVE_SYNTAX_YANG, "Invalid name \"%s\" of typedef - name collision with a built-in type.", name);
-        return LY_EEXIST;
+        LOGVAL_PARSER(ctx, LYVE_SYNTAX_YANG,
+                "Duplicate identifier \"%s\" of typedef statement - name collision with a built-in type.", name);
+        return LY_EVALID;
     }
 
     /* check locally scoped typedefs (avoid name shadowing) */
@@ -386,31 +387,32 @@
                 break;
             }
             if (!strcmp(name, typedefs[u].name)) {
-                LOGVAL_PARSER(ctx, LYVE_SYNTAX_YANG, "Invalid name \"%s\" of typedef - name collision with sibling type.", name);
-                return LY_EEXIST;
+                LOGVAL_PARSER(ctx, LYVE_SYNTAX_YANG,
+                        "Duplicate identifier \"%s\" of typedef statement - name collision with sibling type.", name);
+                return LY_EVALID;
             }
         }
         /* search typedefs in parent's nodes */
         for (parent = node->parent; parent; parent = parent->parent) {
             if (lysp_type_match(name, parent)) {
-                LOGVAL_PARSER(ctx, LYVE_SYNTAX_YANG, "Invalid name \"%s\" of typedef - name collision with another scoped type.", name);
-                return LY_EEXIST;
+                LOGVAL_PARSER(ctx, LYVE_SYNTAX_YANG,
+                        "Duplicate identifier \"%s\" of typedef statement - name collision with another scoped type.", name);
+                return LY_EVALID;
             }
         }
     }
 
     /* check collision with the top-level typedefs */
-    hash = dict_hash(name, name_len);
     if (node) {
+        hash = dict_hash(name, name_len);
         if (!lyht_find(tpdfs_global, &name, hash, NULL)) {
-            LOGVAL_PARSER(ctx, LYVE_SYNTAX_YANG, "Invalid name \"%s\" of typedef - scoped type collide with a top-level type.", name);
-            return LY_EEXIST;
+            LOGVAL_PARSER(ctx, LYVE_SYNTAX_YANG,
+                    "Duplicate identifier \"%s\" of typedef statement - scoped type collide with a top-level type.", name);
+            return LY_EVALID;
         }
     } else {
-        if (lyht_insert(tpdfs_global, &name, hash, NULL)) {
-            LOGVAL_PARSER(ctx, LYVE_SYNTAX_YANG, "Invalid name \"%s\" of typedef - name collision with another top-level type.", name);
-            return LY_EEXIST;
-        }
+        LY_CHECK_RET(lysp_check_dup_ht_insert(ctx, tpdfs_global, name, "typedef",
+                "name collision with another top-level type"));
         /* it is not necessary to test collision with the scoped types - in lysp_check_typedefs, all the
          * top-level typedefs are inserted into the tables before the scoped typedefs, so the collision
          * is detected in the first branch few lines above */
diff --git a/tests/utests/schema/test_schema_common.c b/tests/utests/schema/test_schema_common.c
index e5d20f4..c769e5d 100644
--- a/tests/utests/schema/test_schema_common.c
+++ b/tests/utests/schema/test_schema_common.c
@@ -189,62 +189,62 @@
     const char *str;
 
     str = "module a {namespace urn:a; prefix a; typedef binary {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"binary\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"binary\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef bits {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"bits\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"bits\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef boolean {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"boolean\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"boolean\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef decimal64 {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"decimal64\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"decimal64\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef empty {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"empty\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"empty\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef enumeration {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"enumeration\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"enumeration\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef int8 {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"int8\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"int8\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef int16 {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"int16\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"int16\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef int32 {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"int32\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"int32\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef int64 {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"int64\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"int64\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef instance-identifier {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"instance-identifier\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"instance-identifier\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef identityref {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"identityref\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"identityref\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef leafref {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"leafref\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"leafref\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef string {type int8;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"string\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"string\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef union {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"union\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"union\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef uint8 {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"uint8\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"uint8\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef uint16 {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"uint16\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"uint16\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef uint32 {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"uint32\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"uint32\" of typedef statement - name collision with a built-in type.", NULL);
     str = "module a {namespace urn:a; prefix a; typedef uint64 {type string;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"uint64\" of typedef - name collision with a built-in type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"uint64\" of typedef statement - name collision with a built-in type.", NULL);
 
     str = "module mytypes {namespace urn:types; prefix t; typedef binary_ {type string;} typedef bits_ {type string;} typedef boolean_ {type string;} "
             "typedef decimal64_ {type string;} typedef empty_ {type string;} typedef enumeration_ {type string;} typedef int8_ {type string;} typedef int16_ {type string;}"
@@ -254,20 +254,20 @@
     assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_SUCCESS);
 
     str = "module a {namespace urn:a; prefix a; typedef test {type string;} typedef test {type int8;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"test\" of typedef - name collision with another top-level type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"test\" of typedef statement - name collision with another top-level type.", NULL);
 
     str = "module a {namespace urn:a; prefix a; typedef x {type string;} container c {typedef x {type int8;}}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"x\" of typedef - scoped type collide with a top-level type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"x\" of typedef statement - scoped type collide with a top-level type.", NULL);
 
     str = "module a {namespace urn:a; prefix a; container c {container d {typedef y {type int8;}} typedef y {type string;}}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"y\" of typedef - name collision with another scoped type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"y\" of typedef statement - name collision with another scoped type.", NULL);
 
     str = "module a {namespace urn:a; prefix a; container c {typedef y {type int8;} typedef y {type string;}}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"y\" of typedef - name collision with sibling type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"y\" of typedef statement - name collision with sibling type.", NULL);
 
     str = "module a {namespace urn:a; prefix a; container c {typedef x {type t{}}";
     assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
@@ -276,18 +276,18 @@
 
     ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, "submodule b {belongs-to a {prefix a;} typedef x {type string;}}");
     str = "module a {namespace urn:a; prefix a; include b; typedef x {type int8;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"x\" of typedef - name collision with another top-level type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"x\" of typedef statement - name collision with another top-level type.", NULL);
 
     ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, "submodule b {belongs-to a {prefix a;} container c {typedef x {type string;}}}");
     str = "module a {namespace urn:a; prefix a; include b; typedef x {type int8;}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"x\" of typedef - scoped type collide with a top-level type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"x\" of typedef statement - scoped type collide with a top-level type.", NULL);
 
     ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, "submodule b {belongs-to a {prefix a;} typedef x {type int8;}}");
     str = "module a {namespace urn:a; prefix a; include b; container c {typedef x {type string;}}}";
-    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EEXIST);
-    CHECK_LOG("Invalid name \"x\" of typedef - scoped type collide with a top-level type.", NULL);
+    assert_int_equal(lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL), LY_EVALID);
+    CHECK_LOG("Duplicate identifier \"x\" of typedef statement - scoped type collide with a top-level type.", NULL);
 }
 
 void