1 files changed, 58 insertions, 0 deletions
diff --git a/src/assert.c b/src/assert.c
new file mode 100644
index 0000000..0577768
--- /dev/null
+++ b/src/assert.c
@@ -0,0 +1,58 @@
+/* grecs - Gray's Extensible Configuration System
+   Copyright (C) 2007-2019 Sergey Poznyakoff
+
+   Grecs 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.
+
+   Grecs 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 Grecs. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#include <errno.h>
+#include <grecs.h>
+
+int
+grecs_assert_value_type(const grecs_value_t *value, int type,
+			grecs_locus_t *refloc)
+{
+	if (GRECS_VALUE_EMPTY_P(value)) {
+		grecs_error(refloc, 0, _("expected %s"),
+			    gettext(grecs_value_type_string(type)));
+		return 1;
+	}
+	if (value->type != type) {
+		grecs_error(&value->locus, 0, _("expected %s, but found %s"),
+			    gettext(grecs_value_type_string(type)),
+			    gettext(grecs_value_type_string(value->type)));
+		return 1;
+	}
+	return 0;
+}
+
+int
+grecs_assert_scalar_stmt(grecs_locus_t *locus, enum grecs_callback_command cmd)
+{
+	if (cmd != grecs_callback_set_value) {
+		grecs_error(locus, 0, _("unexpected block statement"));
+		return 1;
+	}
+	return 0;
+}
+
+int
+grecs_assert_node_value_type(enum grecs_callback_command cmd,
+			     grecs_node_t *node, int type)
+{
+	return grecs_assert_scalar_stmt(&node->locus, cmd)
+		&& grecs_assert_value_type(node->v.value, type,
+					   &node->locus);
+}