[avr-libc-commit] [2323] Edited daylight_seconds() for readability

[Mike Rice]

Revision: 2323
          http://svn.sv.gnu.org/viewvc/?view=rev&root=avr-libc&revision=2323
Author:   swfltek
Date:     2013-04-02 21:08:04 +0000 (Tue, 02 Apr 2013)
Log Message:
-----------
Edited daylight_seconds() for readability

Modified Paths:
--------------
    trunk/avr-libc/libc/time/daylight_seconds.c

Modified: trunk/avr-libc/libc/time/daylight_seconds.c
===================================================================
--- trunk/avr-libc/libc/time/daylight_seconds.c 2013-04-02 20:59:28 UTC (rev 
2322)
+++ trunk/avr-libc/libc/time/daylight_seconds.c 2013-04-02 21:08:04 UTC (rev 
2323)
@@ -29,8 +29,8 @@
 /* $Id$ */
 
 /*
-       Determine the amount of time the sun is above the horizon. At high 
latitudes, this can be zero,
-       or >= ONE_DAY.
+    Determine the amount of time the sun is above the horizon. At high 
latitudes, this can be zero,
+    or >= ONE_DAY.
 */
 
 #include <time.h>
@@ -41,27 +41,28 @@
 long
 daylight_seconds(time_t * timer)
 {
-       double          l, d;
-       long            n;
+    double          l, d;
+    long            n;
 
-       /* convert latitude to radians */
-       l = __latitude / 206264.806;
+    /* convert latitude to radians */
+    l = __latitude / 206264.806;
 
-       d = -solar_declination(timer);
+    d = -solar_declination(timer);
 
-       d = tan(l) * tan(d);
+    d = tan(l) * tan(d);
 
-       if (d > 1.0)
-               d = 1.0;
+    /* d may exceed a magnitude of 1.0 at high latitudes */
+    if (d > 1.0)
+        d = 1.0;
 
-       if (d < -1.0)
-               d = -1.0;
+    if (d < -1.0)
+        d = -1.0;
 
-       d = acos(d);
+    d = acos(d);
 
-       d /= 3.112505;
+    d /= 3.112505;
 
-       n = ONE_DAY * d;
+    n = ONE_DAY * d;
 
-       return n;
+    return n;
 }