Outsource magic error messages (#4821)

Modify tools/gen-magic-strings.py to generate error messages.

JerryScript-DCO-1.0-Signed-off-by: Csaba Repasi repasics@inf.u-szeged.hu

tools/check-strings.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# Copyright JS Foundation and other contributors, http://js.foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+MAGIC_STRINGS_GEN="tools/gen-strings.py"
+MAGIC_STRINGS_INC_H="jerry-core/lit/lit-magic-strings.inc.h"
+MAGIC_STRINGS_TEMP=`mktemp lit-magic-strings.inc.h.XXXXXXXXXX`
+
+cp $MAGIC_STRINGS_INC_H $MAGIC_STRINGS_TEMP
+$MAGIC_STRINGS_GEN
+DIFF_RESULT=$?
+
+if [ $DIFF_RESULT -eq 0 ]
+then
+  diff -q $MAGIC_STRINGS_INC_H $MAGIC_STRINGS_TEMP
+  DIFF_RESULT=$?
+  if [ $DIFF_RESULT -ne 0 ]
+  then
+    echo -e "\e[1;33m$MAGIC_STRINGS_INC_H must be re-generated. Run $MAGIC_STRINGS_GEN\e[0m"
+  fi
+fi
+mv $MAGIC_STRINGS_TEMP $MAGIC_STRINGS_INC_H
+
+exit $DIFF_RESULT