1 files changed, 122 insertions, 0 deletions
diff --git a/lib/msun/tests/nan_test.c b/lib/msun/tests/nan_test.c
new file mode 100644
index 0000000..c12926b
--- /dev/null
+++ b/lib/msun/tests/nan_test.c
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+/*-
+ * Copyright (C) 2007 David Schultz <das@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Test for nan(), nanf(), and nanl(). We also test that strtod("nan(...)")
+ * and sscanf("nan(...)", ...) work identically.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <assert.h>
+#include <fenv.h>
+#include <float.h>
+#include <locale.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void
+testnan(const char *nan_format)
+{
+	char nan_str[128];
+	char *end;
+	long double ald[4];
+	double ad[4];
+	float af[4];
+	int i;
+
+	snprintf(nan_str, sizeof(nan_str), "nan(%s)", nan_format);
+	for (i = 0; i < 4; i++) {
+		/*
+		 * x86 has an 80-bit long double stored in 96 bits,
+		 * so we need to initialize the memory for the memcmp()
+		 * checks below to work.
+		 */
+		bzero(&af[i], sizeof(float));
+		bzero(&ad[i], sizeof(double));
+		bzero(&ald[i], sizeof(long double));
+		   
+	}
+
+	af[0] = nanf(nan_format);
+	assert(isnan(af[0]));
+	af[1] = strtof(nan_str, &end);
+	assert(end == nan_str + strlen(nan_str));
+	assert(sscanf(nan_str, "%e", &af[2]) == 1);
+	assert(memcmp(&af[0], &af[1], sizeof(float)) == 0);
+	assert(memcmp(&af[1], &af[2], sizeof(float)) == 0);
+	if (*nan_format == '\0') {
+		/* nanf("") == strtof("nan") */
+		af[3] = strtof("nan", NULL);
+		assert(memcmp(&af[2], &af[3], sizeof(float)) == 0);
+	}
+
+	ad[0] = nan(nan_format);
+	assert(isnan(ad[0]));
+	ad[1] = strtod(nan_str, &end);
+	assert(end == nan_str + strlen(nan_str));
+	assert(sscanf(nan_str, "%le", &ad[2]) == 1);
+	assert(memcmp(&ad[0], &ad[1], sizeof(double)) == 0);
+	assert(memcmp(&ad[1], &ad[2], sizeof(double)) == 0);
+	if (*nan_format == '\0') {
+		/* nan("") == strtod("nan") */
+		ad[3] = strtod("nan", NULL);
+		assert(memcmp(&ad[2], &ad[3], sizeof(double)) == 0);
+	}
+
+	ald[0] = nanl(nan_format);
+	assert(isnan(ald[0]));
+	ald[1] = strtold(nan_str, &end);
+	assert(end == nan_str + strlen(nan_str));
+	assert(sscanf(nan_str, "%Le", &ald[2]) == 1);
+	assert(memcmp(&ald[0], &ald[1], sizeof(long double)) == 0);
+	assert(memcmp(&ald[1], &ald[2], sizeof(long double)) == 0);
+	if (*nan_format == '\0') {
+		/* nanl("") == strtold("nan") */
+		ald[3] = strtold("nan", NULL);
+		assert(memcmp(&ald[2], &ald[3], sizeof(long double)) == 0);
+	}
+}
+
+int
+main(int argc, char *argv[])
+{
+
+	printf("1..1\n");
+
+	/* Die if a signalling NaN is returned */
+	feenableexcept(FE_INVALID);
+
+	testnan("0x1234");
+	testnan("");
+
+	printf("ok 1 - nan\n");
+
+	return (0);
+}