chore: add head to util_dsl.c

src/util/util_dsl.c

@@ -1,3 +1,42 @@
+/**
+ * @internal
+ *  ___________  _____   _
+ * |____ | ___ \/  __ \ | |
+ *     / / |_/ /| /  \/ | | __ _ _ __   __ _ _   _  __ _  __ _  ___
+ *     \ \ ___ \| |     | |/ _` | '_ \ / _` | | | |/ _` |/ _` |/ _ \
+ * .___/ / |_/ /| \__/\ | | (_| | | | | (_| | |_| | (_| | (_| |  __/
+ * \____/\____/  \____/ |_|\__,_|_| |_|\__, |\__,_|\__,_|\__, |\___|
+ *                                     __/ |             __/ |
+ *                                    |___/             |___/
+ * @endinternal
+ * @file util_dsl.c
+ *
+ * @short
+ * domain specific language utility
+ *
+ * @brief
+ * Utility for writing simple language lexers without precedence tracking
+ *
+ * @copyright
+ * Low-level language, tiny virtual machine, intermediate representation,     \n
+ * embeddable, easy for beginners. (Friendly Punched cards)                   \n
+ *                                                                            \n
+ * Copyright (C) 2020 Rodrigo Dornelles.                                      \n
+ *                                                                            \n
+ * This program is free software: you can redistribute it and/or modify       \n
+ * it under the terms of the GNU Affero General Public License as published   \n
+ * by the Free Software Foundation, either version 3 of the License,          \n
+ * or any later version.                                                      \n
+ *                                                                            \n
+ * This program is distributed in the hope that it will be useful,            \n
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of             \n
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              \n
+ * GNU Affero General Public License for more details.                        \n
+ *                                                                            \n
+ * You should have received a copy of the GNU Affero General Public License   \n
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.     \n
+ */
+
 #include <stdbool.h>
 #include "util_dsl.h"
 #include "types/types_null.h"