scc

commit ceba9e9fa10db6fce6b270de7a803a9734337002
parent 0203cf6fd97f26960bb1c6e747d8d72f76033479
Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date:   Wed, 22 Apr 2026 12:10:45 +0200

tests/libc: Add 0070-difftime

Diffstat:
M
tests/libc/execute/.gitignore
 | 
1
+
A
tests/libc/execute/0070-difftime.c
 | 
34
++++++++++++++++++++++++++++++++++
M
tests/libc/execute/libc-tests.lst
 | 
1
+

3 files changed, 36 insertions(+), 0 deletions(-)
diff --git a/tests/libc/execute/.gitignore b/tests/libc/execute/.gitignore
@@ -68,3 +68,4 @@ test.log
 0067-wcwidth
 0068-fseek
 0069-mktime
+0070-difftime
diff --git a/tests/libc/execute/0070-difftime.c b/tests/libc/execute/0070-difftime.c
@@ -0,0 +1,34 @@
+/*
+output:
+testing
+done
+end:
+*/
+
+#include <assert.h>
+#include <stdio.h>
+#include <time.h>
+
+int
+test(void)
+{
+	double d1, d2;
+	time_t t1, t2;
+
+	for (t1 = t2 = time(NULL); difftime(t1, t2) < 0.005; t2 = time(NULL))
+		;
+
+	d1 = difftime(t1, t2);
+	d2 = difftime(t2, t1);
+	assert(d1 + d2 < 0.0005);
+}
+
+int
+main(void)
+{
+	puts("testing");
+	test();
+	puts("done");
+
+	return 0;
+}
diff --git a/tests/libc/execute/libc-tests.lst b/tests/libc/execute/libc-tests.lst
@@ -66,3 +66,4 @@
 0067-wcwidth [TODO]
 0068-fseek
 0069-mktime
+0070-difftime