From 3fcd58c715993b3c2a42e21d41fece5d7d09243c Mon Sep 17 00:00:00 2001
From: Gediminas Jakutis <gediminas@varciai.lt>
Date: Mon, 12 Aug 2019 17:59:10 +0300
Subject: time: add timeval versions.

We now got functions to operate on both struct timespec and
struct timeval.

Signed-off-by: Gediminas Jakutis <gediminas@varciai.lt>
---
 src/time/time.c         | 104 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/time/time_private.h |   1 +
 2 files changed, 105 insertions(+)

(limited to 'src')

diff --git a/src/time/time.c b/src/time/time.c
index d9f00b7..489196d 100644
--- a/src/time/time.c
+++ b/src/time/time.c
@@ -62,6 +62,47 @@ struct timespec rin_time_normalize(const struct timespec * const t)
 	return ret;
 }
 
+struct timeval rin_timeval_add(const struct timeval * const a, const struct timeval * const b)
+{
+	struct timeval ret;
+
+	ret.tv_sec = a->tv_sec + b->tv_sec;
+	ret.tv_usec = a->tv_usec + b->tv_usec;
+
+	return rin_timeval_normalize(&ret);
+}
+
+struct timeval rin_timeval_sub(const struct timeval * const a, const struct timeval * const b)
+{
+	struct timeval ret;
+
+	ret.tv_sec = a->tv_sec - b->tv_sec;
+	ret.tv_usec = a->tv_usec - b->tv_usec;
+
+	return rin_timeval_normalize(&ret);
+}
+
+struct timeval rin_timeval_normalize(const struct timeval * const t)
+{
+	struct timeval ret;
+
+	ret = *t;
+
+	if (ret.tv_usec >= 0 && ret.tv_usec <= tv_usec_max) {
+		return ret;
+	}
+
+	if (ret.tv_usec > 0) {
+		ret.tv_sec += ret.tv_usec / (tv_usec_max + 1);
+		ret.tv_usec = ret.tv_usec % (tv_usec_max + 1);
+	} else {
+		ret.tv_sec += ret.tv_usec / (tv_usec_max + 1) - 1;
+		ret.tv_usec = (tv_usec_max + 1) - (-ret.tv_usec) % (tv_usec_max + 1);
+	}
+
+	return ret;
+}
+
 long int rin_time_cmp(const struct timespec * const a, const struct timespec * const b)
 {
 	if (a->tv_sec != b->tv_sec) {
@@ -71,6 +112,15 @@ long int rin_time_cmp(const struct timespec * const a, const struct timespec * c
 	}
 }
 
+long int rin_timeval_cmp(const struct timeval * const a, const struct timeval * const b)
+{
+	if (a->tv_sec != b->tv_sec) {
+		return a->tv_sec - b->tv_sec;
+	} else {
+		return a->tv_usec - b->tv_usec;
+	}
+}
+
 unsigned int rin_time_cmp_less(const struct timespec * const a, const struct timespec * const b)
 {
 	if (a->tv_sec > b->tv_sec) {
@@ -124,3 +174,57 @@ unsigned int rin_time_cmp_nonequal(const struct timespec * const a, const struct
 {
 	return a->tv_sec != b->tv_sec || a->tv_nsec != b->tv_nsec;
 }
+
+unsigned int rin_timeval_cmp_less(const struct timeval * const a, const struct timeval * const b)
+{
+	if (a->tv_sec > b->tv_sec) {
+		return 0;
+	} else if (a->tv_sec < b->tv_sec) {
+		return 1;
+	} else {
+		return a->tv_usec < b->tv_usec;
+	}
+}
+
+unsigned int rin_timeval_cmp_more(const struct timeval * const a, const struct timeval * const b)
+{
+	if (a->tv_sec < b->tv_sec) {
+		return 0;
+	} else if (a->tv_sec > b->tv_sec) {
+		return 1;
+	} else {
+		return a->tv_usec > b->tv_usec;
+	}
+}
+
+unsigned int rin_timeval_cmp_lessequal(const struct timeval * const a, const struct timeval * const b)
+{
+	if (a->tv_sec > b->tv_sec) {
+		return 0;
+	} else if (a->tv_sec < b->tv_sec) {
+		return 1;
+	} else {
+		return a->tv_usec <= b->tv_usec;
+	}
+}
+
+unsigned int rin_timeval_cmp_moreequal(const struct timeval * const a, const struct timeval * const b)
+{
+	if (a->tv_sec < b->tv_sec) {
+		return 0;
+	} else if (a->tv_sec > b->tv_sec) {
+		return 1;
+	} else {
+		return a->tv_usec >= b->tv_usec;
+	}
+}
+
+unsigned int rin_timeval_cmp_equal(const struct timeval * const a, const struct timeval * const b)
+{
+	return a->tv_sec == b->tv_sec && a->tv_usec == b->tv_usec;
+}
+
+unsigned int rin_timeval_cmp_nonequal(const struct timeval * const a, const struct timeval * const b)
+{
+	return a->tv_sec != b->tv_sec || a->tv_usec != b->tv_usec;
+}
diff --git a/src/time/time_private.h b/src/time/time_private.h
index 4bb6099..097a987 100644
--- a/src/time/time_private.h
+++ b/src/time/time_private.h
@@ -22,5 +22,6 @@
 #define LIBRIN_TIME_PRIVATE_INCLUDED
 
 static const long tv_nsec_max = 999999999l;
+static const long tv_usec_max = 999999l;
 
 #endif /* LIBRIN_TIME_PRIVATE_INCLUDED */
-- 
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