add a utility function to print a message to stderr and then quit

[gltest.git] / glutil.cpp

diff --git a/glutil.cpp b/glutil.cpp
index 0da85d527472b31c7b64f2ab43163993760dc035..325c131733d9263aad025375541d3c8b9d7083e2 100644 (file)
--- a/glutil.cpp
+++ b/glutil.cpp
@@ -20,6 +20,16 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdarg.h>
+
+void die(const char *msg, ...)
+{
+       va_list ap;
+       va_start(ap, msg);
+       vfprintf(stderr, msg, ap);
+       va_end(ap);
+       exit(1);
+}
 
 static const char *glErrorToString(GLenum e)
 {
@@ -43,6 +53,5 @@ void checkGlError(const char *what)
 {
        GLenum e = glGetError();
        if (e == GL_NO_ERROR) return;
-       fprintf(stderr, "GL error %d (%s): %s\n", e, glErrorToString(e), what);
-       exit(1);
+       die("GL error %d (%s): %s\n", e, glErrorToString(e), what);
 }