From 2c9f47eb2eb7456948aeb8bed307e6b39be2cc32 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Fri, 1 Mar 2019 20:49:48 -0500
Subject: basic <stdarg.h> tests

---
 Makefile |  1 +
 main.c   |  2 +-
 stdarg.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+), 1 deletion(-)
 create mode 100644 stdarg.c

diff --git a/Makefile b/Makefile
index 59f0da7..304851a 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,7 @@ TESTOBJS=main.o \
 	math.o \
 	setjmp.o \
 	signal.o \
+	stdarg.o \
 	stdbool.o \
 	stddef.o \
 	time.o \
diff --git a/main.c b/main.c
index 23dbc18..316bd83 100644
--- a/main.c
+++ b/main.c
@@ -53,7 +53,7 @@ int main(int argc, char *argv[])
 	/* test_setjmp_h(); */
 	test_signal_h();
 	/* test_stdalign_h(); */
-	/* test_stdarg_h(); */
+	test_stdarg_h();
 	/* test_stdatomic_h(); */
 	test_stdbool_h();
 	test_stddef_h();
diff --git a/stdarg.c b/stdarg.c
new file mode 100644
index 0000000..38eb9b0
--- /dev/null
+++ b/stdarg.c
@@ -0,0 +1,44 @@
+#include <stdarg.h>
+#include <float.h>
+#include <limits.h>
+#include "test.h"
+
+typedef enum { INT, LONG, DOUBLE, LONG_DOUBLE, POINTER } type;
+
+static void variadic(type t, ...)
+{
+	int i;
+	long l;
+	double d;
+	float f;
+	long double ld;
+	void *p;
+
+	va_list ap;
+	va_start(ap, t);
+
+	switch (t) {
+	case INT:	i = va_arg(ap, int); test_true(i == INT_MAX); break;
+	case LONG:	l = va_arg(ap, long); test_true(l == LONG_MAX); break;
+	case DOUBLE:	d = va_arg(ap, double); test_true(d == DBL_MAX); break;
+	case LONG_DOUBLE: ld = va_arg(ap, long double); test_true(ld == LDBL_MAX); break;	
+	case POINTER:	p = va_arg(ap, void *); test_true(p == 0); break;
+	}
+
+	va_end(ap);
+}
+
+void test_stdarg_h(void)
+{
+	testing_header("stdarg.h");
+
+	variadic(INT, INT_MAX);
+	variadic(LONG, LONG_MAX);
+	/*
+	variadic(DOUBLE, DBL_MAX);
+	variadic(LONG_DOUBLE, LDBL_MAX);
+	*/
+	variadic(POINTER, 0);
+
+	testing_end();
+}
-- 
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