1 files changed, 66 insertions, 0 deletions
diff --git a/src/utils.c b/src/utils.c
new file mode 100644
index 0000000..3d91753
--- /dev/null
+++ b/src/utils.c
@@ -0,0 +1,66 @@
+/* geml - General extendable macro language
+ *   utils.h Various utility functions
+ *
+ * Copyright (C) 2016 Karel Kočí
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+#include <stdio.h>
+#include <stdarg.h>
+#include "utils.h"
+
+static enum Verbosity verbosity = V_INFO;
+
+void verbosity_set(enum Verbosity level) {
+	if (level > V_DIE)
+		level = V_DIE;
+	else if (level < V_DEVEL)
+		level = V_DEVEL;
+	verbosity = level;
+}
+
+void verbosity_inc(void) {
+	verbosity--;
+	verbosity_set(verbosity);
+}
+
+void verbosity_dec(void) {
+	verbosity++;
+	verbosity_set(verbosity);
+}
+
+// TODO colors if terminal supports them
+static const char *v_name[] = {
+	"DEVEL",
+	"DEBUG",
+	"INFO",
+	"WARN",
+	"ERROR",
+	"DIE"
+};
+
+void print_message(const char *file, const int line, enum Verbosity level, const char *msg, ...) {
+	ASSERT(level <= V_DIE && level >= V_DEVEL);
+	if (level < verbosity)
+		return;
+	fputs(v_name[level + 2], stderr);
+	if (verbosity <= V_DEBUG)
+		fprintf(stderr, ":%s:%d", file, line);
+	fputs(":", stderr);
+	va_list args;
+	va_start(args, msg);
+	vfprintf(stderr, msg, args);
+	fputs("\n", stderr);
+}