From 1d7384540d665cdb91806c51a5b917ad6e152388 Mon Sep 17 00:00:00 2001
From: miod <>
Date: Fri, 16 Jan 2004 19:34:37 +0000
Subject: Test more ways of producing a positive infinity, and then test
 negative infinity as well to prevent entropy leak; the usual suspects still
 fail all tests.

---
 src/regress/lib/libc/ieeefp/infinity/Makefile   | 17 ++++++-
 src/regress/lib/libc/ieeefp/infinity/infinity.c | 59 ++++++++++++++++++++++---
 2 files changed, 67 insertions(+), 9 deletions(-)

(limited to 'src')

diff --git a/src/regress/lib/libc/ieeefp/infinity/Makefile b/src/regress/lib/libc/ieeefp/infinity/Makefile
index a593fcf37d..ac102d8a63 100644
--- a/src/regress/lib/libc/ieeefp/infinity/Makefile
+++ b/src/regress/lib/libc/ieeefp/infinity/Makefile
@@ -1,9 +1,22 @@
-#	$OpenBSD: Makefile,v 1.1 2004/01/15 18:53:24 miod Exp $
+#	$OpenBSD: Makefile,v 1.2 2004/01/16 19:34:37 miod Exp $
 
 PROG=	infinity
-SRCS=	infinity.c
 
 DPADD+=	${LIBM}
 LDADD+=	-lm
 
+REGRESS_TARGETS+= add mult neg pumpkin
+
+add: ${PROG}
+	./${PROG} -a
+
+mult: ${PROG}
+	./${PROG} -m
+
+neg: ${PROG}
+	./${PROG} -n
+
+pumpkin: ${PROG}
+	./${PROG} -p
+
 .include <bsd.regress.mk>
diff --git a/src/regress/lib/libc/ieeefp/infinity/infinity.c b/src/regress/lib/libc/ieeefp/infinity/infinity.c
index 0f60b4762b..3b1b71ec90 100644
--- a/src/regress/lib/libc/ieeefp/infinity/infinity.c
+++ b/src/regress/lib/libc/ieeefp/infinity/infinity.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: infinity.c,v 1.1 2004/01/15 18:53:24 miod Exp $	*/
+/*	$OpenBSD: infinity.c,v 1.2 2004/01/16 19:34:37 miod Exp $	*/
 /*
  * Written by Miodrag Vallat, 2004 - Public Domain
  * Inspired from Perl's t/op/arith test #134
@@ -6,6 +6,7 @@
 
 #include <math.h>
 #include <signal.h>
+#include <unistd.h>
 
 void
 sigfpe(int signum)
@@ -17,16 +18,60 @@ sigfpe(int signum)
 int
 main(int argc, char *argv[])
 {
-	double d, u;
+	int opt;
+	double d, two;
 	int i;
+	char method = 'a';
+
+	while ((opt = getopt(argc, argv, "amnp")) != -1)
+		method = (char)opt;
 
 	signal(SIGFPE, sigfpe);
 
-	d = 1.0;
-	for (i = 2000; i != 0; i--) {
-		d = d * 2.0;
+	switch (method) {
+	case 'a':
+		/* try to produce +Inf through addition */
+		d = 1.0;
+		for (i = 2000; i != 0; i--) {
+			d = d + d;
+		}
+		/* result should be _positive_ infinity */
+		if (!isinf(d) || copysign(1.0, d) < 0.0)
+			return (1);
+		break;
+	case 'm':
+		/* try to produce +Inf through multiplication */
+		d = 1.0;
+		two = 2.0;
+		for (i = 2000; i != 0; i--) {
+			d = d * two;
+		}
+		/* result should be _positive_ infinity */
+		if (!isinf(d) || copysign(1.0, d) < 0.0)
+			return (1);
+		break;
+	case 'n':
+		/* try to produce -Inf through subtraction */
+		d = -1.0;
+		for (i = 2000; i != 0; i--) {
+			d = d + d;
+		}
+		/* result should be _negative_ infinity */
+		if (!isinf(d) || copysign(1.0, d) > 0.0)
+			return (1);
+		break;
+	case 'p':
+		/* try to produce -Inf through multiplication */
+		d = -1.0;
+		two = 2.0;
+		for (i = 2000; i != 0; i--) {
+			d = d * two;
+		}
+		/* result should be _negative_ infinity */
+		if (!isinf(d) || copysign(1.0, d) > 0.0)
+			return (1);
+		break;
 	}
 
-	/* result should be _positive_ infinity */
-	return ((isinf(d) && copysign(1.0, d) > 0.0) ? 0 : 1);
+	return (0);
 }
-- 
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