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-rw-r--r--draw/eprint.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/draw/eprint.c b/draw/eprint.c
new file mode 100644
index 0000000..3094b61
--- /dev/null
+++ b/draw/eprint.c
@@ -0,0 +1,18 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "draw.h"
+
+const char *progname;
+
+void
+eprint(const char *fmt, ...) {
+ va_list ap;
+
+ fprintf(stderr, "%s: ", progname);
+ va_start(ap, fmt);
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+ exit(EXIT_FAILURE);
+}