[avr-libc-commit] [2329] Edited comments of moon_phase()

[Mike Rice]

Revision: 2329
          http://svn.sv.gnu.org/viewvc/?view=rev&root=avr-libc&revision=2329
Author:   swfltek
Date:     2013-04-02 21:30:50 +0000 (Tue, 02 Apr 2013)
Log Message:
-----------
Edited comments of moon_phase()

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

Modified: trunk/avr-libc/libc/time/moon_phase.c
===================================================================
--- trunk/avr-libc/libc/time/moon_phase.c       2013-04-02 21:27:23 UTC (rev 
2328)
+++ trunk/avr-libc/libc/time/moon_phase.c       2013-04-02 21:30:50 UTC (rev 
2329)
@@ -29,9 +29,8 @@
 /* $Id$ */
 
 /*
-       Return an approximation to the phase of the moon. Higher accuracy may 
be obtained
-       with a 4 term polynomial, but due to the limitations of our 'double', 
this simple
-       version is about as good, and much faster.
+    Return an approximation to the phase of the moon. This simple algorithm is 
almost as
+    accurate as more elaborate forumlae, given the limitations of the float 
implementation.
 */
 
 #include <time.h>
@@ -39,20 +38,20 @@
 int8_t
 moon_phase(time_t * gmt)
 {
-       uint32_t        t;
-       int32_t         n;
+    uint32_t        t;
+    int32_t         n;
 
-       /* refer to first new moon of the epoch */
-       t = *gmt - 1744800UL;
+    /* refer to first new moon of the epoch */
+    t = *gmt - 1744800UL;
 
-       /* constrain to 1 lunar cycle */
-       n = t % 2551443UL;
+    /* constrain to 1 lunar cycle */
+    n = t % 2551443UL;
 
-       /* offset by 1/2 lunar cycle */
-       n -= 1275721L;
+    /* offset by 1/2 lunar cycle */
+    n -= 1275721L;
 
-       /* scale to range - 100...+ 100 */
-       n /= 12757L;
+    /* scale to range - 100...+ 100 */
+    n /= 12757L;
 
-       return n;
+    return n;
 }