Initial Commit - Copy from Altus Metrum AltOS

ao-tools/lib/ccdbg-debug.c

@@ -0,0 +1,63 @@
+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ccdbg.h"
+#include <stdarg.h>
+
+int
+ccdbg_level = 0;
+
+void
+ccdbg_add_debug(int level)
+{
+	ccdbg_level |= level;
+}
+
+void
+ccdbg_clear_debug(int level)
+{
+	ccdbg_level &= ~level;
+}
+
+static int initialized;
+
+void
+ccdbg_debug(int level, char *format, ...)
+{
+	va_list	ap;
+
+	if (!initialized) {
+		char *level;
+		initialized = 1;
+		level = getenv("CCDEBUG");
+		if (level)
+			ccdbg_level |= strtoul(level, NULL, 0);
+	}
+	if (ccdbg_level & level) {
+		va_start(ap, format);
+		vprintf(format, ap);
+		va_end(ap);
+	}
+}
+
+void
+ccdbg_flush(int level)
+{
+	if (ccdbg_level & level)
+		fflush(stdout);
+}