New upstream version 4.7upstream/4.7

1 files changed, 16 insertions, 46 deletions

diff --git a/src/time.c b/src/time.c
index e7eee3f..4daef27 100644
--- a/src/time.c
+++ b/src/time.c
@@ -6,6 +6,7 @@
  *	General Public License as published by the Free Software Foundation;
  *	either version 2.1 or (at your option) any later version.
  */
+#include <stdint.h>
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <stdbool.h>
@@ -39,38 +40,13 @@ HX_timespec_neg(struct timespec *r, const struct timespec *a)
 EXPORT_SYMBOL struct timespec *HX_timespec_add(struct timespec *r,
     const struct timespec *a, const struct timespec *b)
 {
-	/*
-	 * Split the value represented by the struct into two
-	 * independent values that can be added individually.
-	 */
-	long nsec[2];
-	nsec[0] = (a->tv_sec < 0) ? -a->tv_nsec : a->tv_nsec;
-	nsec[1] = (b->tv_sec < 0) ? -b->tv_nsec : b->tv_nsec;
-
-	r->tv_sec  = a->tv_sec + b->tv_sec;
-	r->tv_nsec = nsec[0] + nsec[1];
-	if (r->tv_nsec >= NANOSECOND) {
-		++r->tv_sec;
-		r->tv_nsec -= NANOSECOND;
-	} else if (r->tv_nsec <= -NANOSECOND) {
-		--r->tv_sec;
-		r->tv_nsec += NANOSECOND;
-	}
-
-	/* Combine again */
-	if (r->tv_sec < 0) {
-		if (r->tv_nsec < 0) {
-			r->tv_nsec = -r->tv_nsec;
-		} else if (r->tv_nsec > 0) {
-			if (++r->tv_sec == 0)
-				r->tv_nsec = -NANOSECOND + r->tv_nsec;
-			else
-				r->tv_nsec = NANOSECOND - r->tv_nsec;
-		}
-	} else if (r->tv_sec > 0 && r->tv_nsec < 0) {
-		--r->tv_sec;
-		r->tv_nsec = NANOSECOND + r->tv_nsec;
-	}
+	long aa = a->tv_sec * NANOSECOND_LL +
+	          ((a->tv_sec >= 0) ? a->tv_nsec : -a->tv_nsec);
+	long bb = b->tv_sec * NANOSECOND_LL +
+	          ((b->tv_sec >= 0) ? b->tv_nsec : -b->tv_nsec);
+	long rr = aa + bb;
+	r->tv_sec  = rr / NANOSECOND;
+	r->tv_nsec = ((r->tv_sec < 0) ? -rr : rr) % NANOSECOND;
 	return r;
 }
 
@@ -119,20 +95,14 @@ HX_timespec_mulf(struct timespec *r, const struct timespec *a, double f)
 EXPORT_SYMBOL struct timeval *HX_timeval_sub(struct timeval *delta,
     const struct timeval *future, const struct timeval *past)
 {
-	delta->tv_sec  = future->tv_sec  - past->tv_sec;
-	delta->tv_usec = future->tv_usec - past->tv_usec;
-	if (future->tv_sec < past->tv_sec || (future->tv_sec == past->tv_sec &&
-	    future->tv_usec < past->tv_usec)) {
-		if (future->tv_usec > past->tv_usec) {
-			delta->tv_usec = -MICROSECOND + delta->tv_usec;
-			++delta->tv_sec;
-		}
-		if (delta->tv_sec < 0)
-			delta->tv_usec *= -1;
-	} else if (delta->tv_usec < 0) {
-		delta->tv_usec += MICROSECOND;
-		--delta->tv_sec;
-	}
+	struct timespec d, f, p;
+	f.tv_sec = future->tv_sec;
+	f.tv_nsec = future->tv_usec * 1000;
+	p.tv_sec = past->tv_sec;
+	p.tv_nsec = past->tv_usec * 1000;
+	HX_timespec_sub(&d, &f, &p);
+	delta->tv_sec = d.tv_sec;
+	delta->tv_usec = d.tv_nsec / 1000;
 	return delta;
 }
 #endif