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-rw-r--r--games/pom/pom.c72
1 files changed, 64 insertions, 8 deletions
diff --git a/games/pom/pom.c b/games/pom/pom.c
index d245f34..fd82f68 100644
--- a/games/pom/pom.c
+++ b/games/pom/pom.c
@@ -57,9 +57,13 @@ __FBSDID("$FreeBSD$");
*
*/
-#include <time.h>
#include <stdio.h>
+#include <stdlib.h>
#include <math.h>
+#include <string.h>
+#include <sysexits.h>
+#include <time.h>
+#include <unistd.h>
#ifndef PI
#define PI 3.14159265358979323846
@@ -76,20 +80,62 @@ __FBSDID("$FreeBSD$");
static void adj360(double *);
static double dtor(double);
static double potm(double);
+static void usage(char *progname);
int
-main(void)
+main(int argc, char **argv)
{
time_t tt;
- struct tm *GMT;
+ struct tm GMT, tmd;
double days, today, tomorrow;
int cnt;
+ char *odate = NULL, *otime = NULL, ch;
+
+ while ((ch = getopt(argc, argv, "d:t:")) != -1)
+ switch (ch) {
+ case 'd':
+ odate = optarg;
+ break;
+ case 't':
+ otime = optarg;
+ break;
+ default:
+ usage(argv[0]);
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ if (argc)
+ usage(argv[0]);
+
+ /* Adjust based on users preferences */
+ time(&tt);
+ if (otime != NULL || odate != NULL) {
+ /* Save today in case -d isn't specified */
+ localtime_r(&tt, &tmd);
+
+ if (odate != NULL) {
+ tmd.tm_year = strtol(odate, NULL, 10) - 1900;
+ tmd.tm_mon = strtol(odate + 5, NULL, 10) - 1;
+ tmd.tm_mday = strtol(odate + 8, NULL, 10);
+ /* Use midnight as the middle of the night */
+ tmd.tm_hour = 0;
+ tmd.tm_min = 0;
+ tmd.tm_sec = 0;
+ }
+ if (otime != NULL) {
+ tmd.tm_hour = strtol(otime, NULL, 10);
+ tmd.tm_min = strtol(otime + 3, NULL, 10);
+ tmd.tm_sec = strtol(otime + 6, NULL, 10);
+ }
+ tt = mktime(&tmd);
+ }
- (void) time(&tt);
- GMT = gmtime(&tt);
- days = (GMT->tm_yday + 1) + ((GMT->tm_hour +
- (GMT->tm_min / 60.0) + (GMT->tm_sec / 3600.0)) / 24.0);
- for (cnt = EPOCH; cnt < GMT->tm_year; ++cnt)
+ gmtime_r(&tt, &GMT);
+ days = (GMT.tm_yday + 1) + ((GMT.tm_hour +
+ (GMT.tm_min / 60.0) + (GMT.tm_sec / 3600.0)) / 24.0);
+ for (cnt = EPOCH; cnt < GMT.tm_year; ++cnt)
days += isleap(1900 + cnt) ? 366 : 365;
today = potm(days) + .5;
(void)printf("The Moon is ");
@@ -160,6 +206,7 @@ potm(double days)
static double
dtor(double deg)
{
+
return(deg * PI / 180);
}
@@ -170,6 +217,7 @@ dtor(double deg)
static void
adj360(double *deg)
{
+
for (;;)
if (*deg < 0)
*deg += 360;
@@ -178,3 +226,11 @@ adj360(double *deg)
else
break;
}
+
+static void
+usage(char *progname)
+{
+
+ fprintf(stderr, "Usage: %s [-d yyyy.mm.dd] [-t hh:mm:ss]\n", progname);
+ exit(EX_USAGE);
+}
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