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-rw-r--r--difftimeval.c123
1 files changed, 121 insertions, 2 deletions
diff --git a/difftimeval.c b/difftimeval.c
index 9ba06c5..0cd8cda 100644
--- a/difftimeval.c
+++ b/difftimeval.c
@@ -1,9 +1,10 @@
/* See LICENSE file for copyright and license details. */
#include "libsimple.h"
+#ifndef TEST
int
-libsimple_difftimeval(struct timeval *diff, const struct timeval *minuend, const struct timeval *subtrahend) /* TODO test */
+libsimple_difftimeval(struct timeval *diff, const struct timeval *minuend, const struct timeval *subtrahend)
{
struct timespec a, b, d;
int r;
@@ -12,5 +13,123 @@ libsimple_difftimeval(struct timeval *diff, const struct timeval *minuend, const
r = libsimple_difftimespec(&d, &a, &b);
if (r && errno != ERANGE)
return r;
- return r | libsimple_timespec2timeval(diff, &d);
+ if (libsimple_timespec2timeval(diff, &d) && r)
+ errno = ERANGE;
+ return r;
}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+ struct timeval r, a, b;
+
+ a.tv_sec = 0, a.tv_usec = 0L;
+ b.tv_sec = 0, b.tv_usec = 0L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == 0);
+ assert(r.tv_usec == 0L);
+
+ a.tv_sec = 10, a.tv_usec = 0L;
+ b.tv_sec = 0, b.tv_usec = 0L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == 10);
+ assert(r.tv_usec == 0L);
+
+ a.tv_sec = 10, a.tv_usec = 100L;
+ b.tv_sec = 0, b.tv_usec = 0L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == 10);
+ assert(r.tv_usec == 100L);
+
+ a.tv_sec = 10, a.tv_usec = 100L;
+ b.tv_sec = 1, b.tv_usec = 0L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == 9);
+ assert(r.tv_usec == 100L);
+
+ a.tv_sec = 10, a.tv_usec = 100L;
+ b.tv_sec = 0, b.tv_usec = 1L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == 10);
+ assert(r.tv_usec == 99L);
+
+ a.tv_sec = -10, a.tv_usec = 100L;
+ b.tv_sec = 0, b.tv_usec = 0L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == -10);
+ assert(r.tv_usec == 100L);
+
+ a.tv_sec = 10, a.tv_usec = 1L;
+ b.tv_sec = 1, b.tv_usec = 100L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == 8);
+ assert(r.tv_usec == 1000001L - 100L);
+
+ a.tv_sec = 10, a.tv_usec = 0L;
+ b.tv_sec = 20, b.tv_usec = 0L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == -10);
+ assert(r.tv_usec == 0L);
+
+ a.tv_sec = 10, a.tv_usec = 10L;
+ b.tv_sec = 20, b.tv_usec = 0L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == -10);
+ assert(r.tv_usec == 10L);
+
+ a.tv_sec = 10, a.tv_usec = 10L;
+ b.tv_sec = 20, b.tv_usec = 20L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == -10 - 1);
+ assert(r.tv_usec == 1000010L - 20L);
+
+ a.tv_sec = 10, a.tv_usec = 10L;
+ b.tv_sec = -20, b.tv_usec = 0L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == 30);
+ assert(r.tv_usec == 10L);
+
+ a.tv_sec = 0, a.tv_usec = 10L;
+ b.tv_sec = 0, b.tv_usec = 0L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == 0);
+ assert(r.tv_usec == 10L);
+
+ a.tv_sec = 0, a.tv_usec = 0L;
+ b.tv_sec = 0, b.tv_usec = 10L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == -1);
+ assert(r.tv_usec == 1000000L - 10L);
+
+ a.tv_sec = TIME_MIN, a.tv_usec = 0L;
+ b.tv_sec = 0, b.tv_usec = 0L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == TIME_MIN);
+ assert(r.tv_usec == 0L);
+
+ a.tv_sec = TIME_MIN, a.tv_usec = 0L;
+ b.tv_sec = 0, b.tv_usec = 1L;
+ assert(libsimple_difftimeval(&r, &a, &b) == -1 && errno == ERANGE);
+ assert(r.tv_sec == TIME_MIN);
+ assert(r.tv_usec == 0L);
+
+ a.tv_sec = TIME_MIN, a.tv_usec = 0L;
+ b.tv_sec = -1, b.tv_usec = 1L;
+ assert(!libsimple_difftimeval(&r, &a, &b));
+ assert(r.tv_sec == TIME_MIN);
+ assert(r.tv_usec == 999999L);
+
+ a.tv_sec = TIME_MAX, a.tv_usec = 0L;
+ b.tv_sec = -1, b.tv_usec = 0L;
+ assert(libsimple_difftimeval(&r, &a, &b) == -1 && errno == ERANGE);
+ assert(r.tv_sec == TIME_MAX);
+ assert(r.tv_usec == 999999L);
+
+ return 0;
+}
+
+#endif