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-rw-r--r--difftimespec.c119
1 files changed, 118 insertions, 1 deletions
diff --git a/difftimespec.c b/difftimespec.c
index 383dced..07f46c9 100644
--- a/difftimespec.c
+++ b/difftimespec.c
@@ -1,9 +1,10 @@
/* See LICENSE file for copyright and license details. */
#include "libsimple.h"
+#ifndef TEST
int
-libsimple_difftimespec(struct timespec *diff, const struct timespec *minuend, const struct timespec *subtrahend) /* TODO test */
+libsimple_difftimespec(struct timespec *diff, const struct timespec *minuend, const struct timespec *subtrahend)
{
long int ns = minuend->tv_nsec - subtrahend->tv_nsec;
time_t s;
@@ -48,3 +49,119 @@ libsimple_difftimespec(struct timespec *diff, const struct timespec *minuend, co
diff->tv_nsec = ns;
return ret;
}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+ struct timespec r, a, b;
+
+ a.tv_sec = 0, a.tv_nsec = 0L;
+ b.tv_sec = 0, b.tv_nsec = 0L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == 0);
+ assert(r.tv_nsec == 0L);
+
+ a.tv_sec = 10, a.tv_nsec = 0L;
+ b.tv_sec = 0, b.tv_nsec = 0L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == 10);
+ assert(r.tv_nsec == 0L);
+
+ a.tv_sec = 10, a.tv_nsec = 100L;
+ b.tv_sec = 0, b.tv_nsec = 0L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == 10);
+ assert(r.tv_nsec == 100L);
+
+ a.tv_sec = 10, a.tv_nsec = 100L;
+ b.tv_sec = 1, b.tv_nsec = 0L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == 9);
+ assert(r.tv_nsec == 100L);
+
+ a.tv_sec = 10, a.tv_nsec = 100L;
+ b.tv_sec = 0, b.tv_nsec = 1L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == 10);
+ assert(r.tv_nsec == 99L);
+
+ a.tv_sec = -10, a.tv_nsec = 100L;
+ b.tv_sec = 0, b.tv_nsec = 0L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == -10);
+ assert(r.tv_nsec == 100L);
+
+ a.tv_sec = 10, a.tv_nsec = 1L;
+ b.tv_sec = 1, b.tv_nsec = 100L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == 8);
+ assert(r.tv_nsec == 1000000001L - 100L);
+
+ a.tv_sec = 10, a.tv_nsec = 0L;
+ b.tv_sec = 20, b.tv_nsec = 0L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == -10);
+ assert(r.tv_nsec == 0L);
+
+ a.tv_sec = 10, a.tv_nsec = 10L;
+ b.tv_sec = 20, b.tv_nsec = 0L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == -10);
+ assert(r.tv_nsec == 10L);
+
+ a.tv_sec = 10, a.tv_nsec = 10L;
+ b.tv_sec = 20, b.tv_nsec = 20L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == -10 - 1);
+ assert(r.tv_nsec == 1000000010L - 20L);
+
+ a.tv_sec = 10, a.tv_nsec = 10L;
+ b.tv_sec = -20, b.tv_nsec = 0L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == 30);
+ assert(r.tv_nsec == 10L);
+
+ a.tv_sec = 0, a.tv_nsec = 10L;
+ b.tv_sec = 0, b.tv_nsec = 0L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == 0);
+ assert(r.tv_nsec == 10L);
+
+ a.tv_sec = 0, a.tv_nsec = 0L;
+ b.tv_sec = 0, b.tv_nsec = 10L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == -1);
+ assert(r.tv_nsec == 1000000000L - 10L);
+
+ a.tv_sec = TIME_MIN, a.tv_nsec = 0L;
+ b.tv_sec = 0, b.tv_nsec = 0L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == TIME_MIN);
+ assert(r.tv_nsec == 0L);
+
+ a.tv_sec = TIME_MIN, a.tv_nsec = 0L;
+ b.tv_sec = 0, b.tv_nsec = 1L;
+ assert(libsimple_difftimespec(&r, &a, &b) == -1 && errno == ERANGE);
+ assert(r.tv_sec == TIME_MIN);
+ assert(r.tv_nsec == 0L);
+
+ a.tv_sec = TIME_MIN, a.tv_nsec = 0L;
+ b.tv_sec = -1, b.tv_nsec = 1L;
+ assert(!libsimple_difftimespec(&r, &a, &b));
+ assert(r.tv_sec == TIME_MIN);
+ assert(r.tv_nsec == 999999999L);
+
+ a.tv_sec = TIME_MAX, a.tv_nsec = 0L;
+ b.tv_sec = -1, b.tv_nsec = 0L;
+ assert(libsimple_difftimespec(&r, &a, &b) == -1 && errno == ERANGE);
+ assert(r.tv_sec == TIME_MAX);
+ assert(r.tv_nsec == 999999999L);
+
+ return 0;
+}
+
+#endif