lib: Fix bug and add test for time_utils

3 files changed, 173 insertions, 6 deletions

diff --git a/src/lib/tests/CMakeLists.txt b/src/lib/tests/CMakeLists.txt
index 71131929..46a3e91f 100644
--- a/src/lib/tests/CMakeLists.txt
+++ b/src/lib/tests/CMakeLists.txt
@@ -10,6 +10,7 @@ create_test_sourcelist(${PARENT_DIR}_tests test_suite.c
   md5_test.c
   rib_test.c
   sha3_test.c
+  time_utils_test.c
   )
 
 add_executable(${PARENT_DIR}_test EXCLUDE_FROM_ALL ${${PARENT_DIR}_tests})
diff --git a/src/lib/tests/time_utils_test.c b/src/lib/tests/time_utils_test.c
new file mode 100644
index 00000000..6d1ae32f
--- /dev/null
+++ b/src/lib/tests/time_utils_test.c
@@ -0,0 +1,164 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Test of the time utilities
+ *
+ *    Dimitri Staessens <dimitri.staessens@ugent.be>
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define _POSIX_C_SOURCE 200809L
+
+#include <ouroboros/time_utils.h>
+
+#include <stdio.h>
+
+static void ts_print(struct timespec * s)
+{
+        printf("timespec is %zd:%zd.\n", s->tv_sec, s->tv_nsec);
+}
+
+static void tv_print(struct timeval * v)
+{
+        printf("timeval is %zd:%zd.\n", v->tv_sec, v->tv_usec);
+}
+
+static void ts_init(struct timespec * s,
+                    time_t            sec,
+                    time_t            nsec)
+{
+        s->tv_sec  = sec;
+        s->tv_nsec = nsec;
+}
+
+static void tv_init(struct timeval * v,
+                    time_t           sec,
+                    time_t           usec)
+{
+        v->tv_sec  = sec;
+        v->tv_usec = usec;
+}
+
+static int ts_check(struct timespec * s,
+                    time_t            sec,
+                    time_t            nsec)
+{
+        return s->tv_sec == sec && s->tv_nsec == nsec;
+}
+
+static int tv_check(struct timeval * v,
+                    time_t           sec,
+                    time_t           usec)
+{
+        return v->tv_sec == sec && v->tv_usec == usec;
+}
+
+int time_utils_test(int     argc,
+                    char ** argv)
+{
+        struct timespec s0;
+        struct timespec s1;
+        struct timespec s2;
+
+        struct timeval v0;
+        struct timeval v1;
+        struct timeval v2;
+
+        (void) argc;
+        (void) argv;
+
+        ts_init(&s0, 0, 0);
+        ts_init(&s1, 5, 0);
+
+        ts_add(&s0, &s1, &s2);
+        if (!ts_check(&s2, 5, 0)) {
+                printf("ts_add failed.\n");
+                ts_print(&s2);
+                return -1;
+        }
+
+        tv_init(&v0, 0, 0);
+        tv_init(&v1, 5, 0);
+
+        tv_add(&v0, &v1, &v2);
+        if (!tv_check(&v2, 5, 0)) {
+                printf("tv_add failed.\n");
+                tv_print(&v2);
+                return -1;
+        }
+
+        ts_init(&s0, 0, 500 * MILLION);
+        ts_init(&s1, 0, 600 * MILLION);
+
+        ts_add(&s0, &s1, &s2);
+        if (!ts_check(&s2, 1, 100 * MILLION)) {
+                printf("ts_add with nano overflow failed.\n");
+                ts_print(&s2);
+                return -1;
+        }
+
+        tv_init(&v0, 0, 500 * 1000);
+        tv_init(&v1, 0, 600 * 1000);
+
+        tv_add(&v0, &v1, &v2);
+        if (!tv_check(&v2, 1, 100 * 1000)) {
+                printf("tv_add with nano overflow failed.\n");
+                tv_print(&v2);
+                return -1;
+        }
+
+        ts_init(&s0, 0, 0);
+        ts_init(&s1, 5, 0);
+
+        ts_diff(&s0, &s1, &s2);
+        if (!ts_check(&s2, -5, 0)) {
+                printf("ts_diff failed.\n");
+                ts_print(&s2);
+                return -1;
+        }
+
+        tv_init(&v0, 0, 0);
+        tv_init(&v1, 5, 0);
+
+        tv_diff(&v0, &v1, &v2);
+        if (!tv_check(&v2, -5, 0)) {
+                printf("tv_diff failed.\n");
+                tv_print(&v2);
+                return -1;
+        }
+
+        ts_init(&s0, 0, 500 * MILLION);
+        ts_init(&s1, 0, 600 * MILLION);
+
+        ts_diff(&s0, &s1, &s2);
+        if (!ts_check(&s2, -1, 900 * MILLION)) {
+                printf("ts_diff with nano underflow failed.\n");
+                ts_print(&s2);
+                return -1;
+        }
+
+        tv_init(&v0, 0, 500 * 1000);
+        tv_init(&v1, 0, 600 * 1000);
+
+        tv_diff(&v0, &v1, &v2);
+        if (!tv_check(&v2, -1, 900 * 1000)) {
+                printf("tv_diff with nano underflow failed.\n");
+                tv_print(&v2);
+                return -1;
+        }
+
+        return 0;
+}
diff --git a/src/lib/time_utils.c b/src/lib/time_utils.c
index 97e97b09..07994af2 100644
--- a/src/lib/time_utils.c
+++ b/src/lib/time_utils.c
@@ -32,7 +32,7 @@ int ts_add(const struct timespec * t,
            const struct timespec * intv,
            struct timespec *       res)
 {
-        long nanos = 0;
+        time_t nanos = 0;
 
         if (t == NULL || intv == NULL || res == NULL)
                 return -1;
@@ -44,6 +44,7 @@ int ts_add(const struct timespec * t,
                 nanos -= BILLION;
                 ++(res->tv_sec);
         }
+
         res->tv_nsec = nanos;
 
         return 0;
@@ -54,7 +55,7 @@ int ts_diff(const struct timespec * t,
             const struct timespec * intv,
             struct timespec *       res)
 {
-        long nanos = 0;
+        time_t nanos = 0;
 
         if (t == NULL || intv == NULL || res == NULL)
                 return -1;
@@ -78,7 +79,7 @@ int tv_add(const struct timeval * t,
            const struct timeval * intv,
            struct timeval *       res)
 {
-        long micros = 0;
+        time_t micros = 0;
 
         if (t == NULL || intv == NULL || res == NULL)
                 return -1;
@@ -88,7 +89,7 @@ int tv_add(const struct timeval * t,
         res->tv_sec = t->tv_sec + intv->tv_sec;
         while (micros >= MILLION) {
                 micros -= MILLION;
-                --(res->tv_sec);
+                ++(res->tv_sec);
         }
         res->tv_usec = micros;
 
@@ -100,7 +101,7 @@ int tv_diff(const struct timeval * t,
             const struct timeval * intv,
             struct timeval       * res)
 {
-        long micros = 0;
+        time_t micros = 0;
 
         if (t == NULL || intv == NULL || res == NULL)
                 return -1;
@@ -143,7 +144,8 @@ int ts_to_tv(const struct timespec * src,
 }
 
 #ifdef __APPLE__
-int clock_gettime(int clock, struct timespec * t)
+int clock_gettime(int               clock,
+                  struct timespec * t)
 {
         struct timeval tv;
         int ret = gettimeofday(&tv, NULL);