--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lwcc/cpp/error.c	Sun Sep 08 21:58:12 2013 -0600
@@ -0,0 +1,59 @@
+/*
+lwcc/cpp/error.c
+
+Copyright © 2013 William Astle
+
+This file is part of LWTOOLS.
+
+LWTOOLS 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/>.
+*/
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "cpp.h"
+
+static void show_file_pos(void)
+{
+	if (file_stack == NULL)
+		return;
+	
+	fprintf(stderr, "(%s:%d): ", file_stack -> fn, file_stack -> line);
+}
+
+void do_error(const char *f, ...)
+{
+	va_list arg;
+	
+	va_start(arg, f);
+	fprintf(stderr, "ERROR: ");
+	show_file_pos();
+	vfprintf(stderr, f, arg);
+	fprintf(stderr, "\n");
+	va_end(arg);
+	exit(1);
+}
+
+void do_warning(const char *f, ...)
+{
+	va_list arg;
+	
+	va_start(arg, f);
+	fprintf(stderr, "WARNING: ");
+	show_file_pos();
+	vfprintf(stderr, f, arg);
+	fprintf(stderr, "\n");
+	va_end(arg);
+}