1 files changed, 54 insertions, 0 deletions
diff --git a/variant.h b/variant.h
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--- /dev/null
+++ b/variant.h
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+/**
+ * Copyright (C) 2020  Evgeny Zinoviev
+ * This file is part of isv <https://github.com/gch1p/isv>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ISV_VARIANT_H
+#define ISV_VARIANT_H
+
+#include <stdbool.h>
+
+typedef enum {
+    VARIANT_TYPE_STRING,
+    VARIANT_TYPE_LONG,
+    VARIANT_TYPE_DOUBLE,
+    VARIANT_TYPE_BOOL,
+    VARIANT_TYPE_FLAG,
+} variant_type_t;
+
+typedef struct {
+    variant_type_t type;
+    double d;
+    long l;
+    bool b;
+    const char *s;
+} variant_t;
+
+variant_t variant_double(double d);
+variant_t variant_long(long l);
+variant_t variant_bool(bool b);
+variant_t variant_flag(bool b);
+variant_t variant_string(const char *s);
+
+void variant_to_string(variant_t v, char *buf, size_t bufsize);
+
+bool variant_is_string(variant_t v);
+bool variant_is_long(variant_t v);
+bool variant_is_bool(variant_t v);
+bool variant_is_flag(variant_t v);
+bool variant_is_double(variant_t v);
+
+#endif //ISV_VARIANT_H