PR/55693: Andreas Gustafsson: factor(6) lists factors in wrong order

[bsdgames-darwin.git] / pom / pom.c

diff --git a/pom/pom.c b/pom/pom.c
index bec57938d23f34dd26e44f5009c2b0f965269329..91ed3f0d74baac5cb71ed0e587066a7239bbd8cf 100644 (file)
--- a/pom/pom.c
+++ b/pom/pom.c
@@ -1,4 +1,4 @@
-/*     $NetBSD: pom.c,v 1.9 1998/06/13 01:09:22 jeremy Exp $   */
+/*     $NetBSD: pom.c,v 1.20 2010/12/05 04:34:22 pgoyette Exp $        */

 
 /*
  * Copyright (c) 1989, 1993
 
 /*
  * Copyright (c) 1989, 1993


@@ -14,11 +14,7 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.

- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *     This product includes software developed by the University of
- *     California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
+ * 3. Neither the name of the University nor the names of its contributors

  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *


@@ -37,15 +33,15 @@
 
 #include <sys/cdefs.h>
 #ifndef lint
 
 #include <sys/cdefs.h>
 #ifndef lint

-__COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
-       The Regents of the University of California.  All rights reserved.\n");
+__COPYRIGHT("@(#) Copyright (c) 1989, 1993\
+ The Regents of the University of California.  All rights reserved.");

 #endif /* not lint */
 
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)pom.c      8.1 (Berkeley) 5/31/93";
 #else
 #endif /* not lint */
 
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)pom.c      8.1 (Berkeley) 5/31/93";
 #else

-__RCSID("$NetBSD: pom.c,v 1.9 1998/06/13 01:09:22 jeremy Exp $");
+__RCSID("$NetBSD: pom.c,v 1.20 2010/12/05 04:34:22 pgoyette Exp $");

 #endif
 #endif /* not lint */
 
 #endif
 #endif /* not lint */
 


@@ -57,58 +53,69 @@ __RCSID("$NetBSD: pom.c,v 1.9 1998/06/13 01:09:22 jeremy Exp $");
  *
  * -- Keith E. Brandt  VIII 1984
  *
  *
  * -- Keith E. Brandt  VIII 1984
  *

+ * Updated to the Third Edition of Duffett-Smith's book, Paul Janzen, IX 1998
+ *

  */
 
  */
 

-#include <sys/time.h>
+#include <ctype.h>

 #include <err.h>
 #include <err.h>

-#include <errno.h>

 #include <math.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <math.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>

-#include <tzfile.h>
-
-#define        PI        3.141592654
-#define        EPOCH     85
-#define        EPSILONg  279.611371    /* solar ecliptic long at EPOCH */
-#define        RHOg      282.680403    /* solar ecliptic long of perigee at EPOCH */
-#define        ECCEN     0.01671542    /* solar orbit eccentricity */
-#define        lzero     18.251907     /* lunar mean long at EPOCH */
-#define        Pzero     192.917585    /* lunar mean long of perigee at EPOCH */
-#define        Nzero     55.204723     /* lunar mean long of node at EPOCH */
-
-void   adj360 __P((double *));
-double dtor __P((double));
-int    main __P((int, char *[]));
-double potm __P((double));
+#include <time.h>
+#include <unistd.h>
+
+#ifndef PI
+#define        PI        3.14159265358979323846
+#endif
+
+/*
+ * The EPOCH in the third edition of the book is 1990 Jan 0.0 TDT.
+ * In this program, we do not bother to correct for the differences
+ * between UTC (as shown by the UNIX clock) and TDT.  (TDT = TAI + 32.184s;
+ * TAI-UTC = 32s in Jan 1999.)
+ */
+#define EPOCH_MINUS_1970       (20 * 365 + 5 - 1) /* 20 years, 5 leaps, back 1 day to Jan 0 */
+#define        EPSILONg  279.403303    /* solar ecliptic long at EPOCH */
+#define        RHOg      282.768422    /* solar ecliptic long of perigee at EPOCH */
+#define        ECCEN     0.016713      /* solar orbit eccentricity */
+#define        lzero     318.351648    /* lunar mean long at EPOCH */
+#define        Pzero     36.340410     /* lunar mean long of perigee at EPOCH */
+#define        Nzero     318.510107    /* lunar mean long of node at EPOCH */
+
+int    main(int, char *[]);
+static void adj360(double *);
+static double dtor(double);
+static double potm(double);
+static time_t parsetime(char *);
+static void badformat(void) __dead;

 
 int
 
 int

-main(argc, argv)
-       int argc;
-       char *argv[];
+main(int argc, char *argv[])

 {
 {

-       struct timeval tp;
-       struct timezone tzp;
-       struct tm *GMT;
-       time_t tmpt;
+       time_t tmpt, now;

        double days, today, tomorrow;
        double days, today, tomorrow;

-       int cnt;
+       char buf[1024];

 
 

+       if (time(&now) == (time_t)-1)
+               err(1, "time");

        if (argc > 1) {
        if (argc > 1) {

-               tp.tv_sec = atoi(argv[1]);
-               tp.tv_usec = 0;
+               tmpt = parsetime(argv[1]);
+               strftime(buf, sizeof(buf), "%a %Y %b %e %H:%M:%S (%Z)",
+                       localtime(&tmpt));
+               printf("%s:  ", buf);

        } else {
        } else {

-               if (gettimeofday(&tp,&tzp))
-                       err(1, "gettimeofday");
+               tmpt = now;

        }
        }

-       tmpt = tp.tv_sec;
-       GMT = gmtime(&tmpt);
-       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(cnt) ? 366 : 365;
+       days = (tmpt - EPOCH_MINUS_1970 * 86400) / 86400.0;

        today = potm(days) + .5;
        today = potm(days) + .5;

-       (void)printf("The Moon is ");
+       if (tmpt < now)
+               (void)printf("The Moon was ");
+       else if (tmpt == now)
+               (void)printf("The Moon is ");
+       else
+               (void)printf("The Moon will be ");

        if ((int)today == 100)
                (void)printf("Full\n");
        else if (!(int)today)
        if ((int)today == 100)
                (void)printf("Full\n");
        else if (!(int)today)


@@ -118,7 +125,11 @@ main(argc, argv)
                if ((int)today == 50)
                        (void)printf("%s\n", tomorrow > today ?
                            "at the First Quarter" : "at the Last Quarter");
                if ((int)today == 50)
                        (void)printf("%s\n", tomorrow > today ?
                            "at the First Quarter" : "at the Last Quarter");

+                       /* today is 0.5 too big, but it doesn't matter here
+                        * since the phase is changing fast enough
+                        */

                else {
                else {

+                       today -= 0.5;           /* Now it might matter */

                        (void)printf("%s ", tomorrow > today ?
                            "Waxing" : "Waning");
                        if (today > 50)
                        (void)printf("%s ", tomorrow > today ?
                            "Waxing" : "Waning");
                        if (today > 50)


@@ -129,53 +140,52 @@ main(argc, argv)
                                    today);
                }
        }
                                    today);
                }
        }

-       exit(0);
+
+       return EXIT_SUCCESS;

 }
 
 /*
  * potm --
  *     return phase of the moon
  */
 }
 
 /*
  * potm --
  *     return phase of the moon
  */

-double
-potm(days)
-       double days;
+static double
+potm(double days)

 {
        double N, Msol, Ec, LambdaSol, l, Mm, Ev, Ac, A3, Mmprime;
        double A4, lprime, V, ldprime, D, Nm;
 
 {
        double N, Msol, Ec, LambdaSol, l, Mm, Ev, Ac, A3, Mmprime;
        double A4, lprime, V, ldprime, D, Nm;
 

-       N = 360 * days / 365.2422;                              /* sec 42 #3 */
+       N = 360 * days / 365.242191;                            /* sec 46 #3 */

        adj360(&N);
        adj360(&N);

-       Msol = N + EPSILONg - RHOg;                             /* sec 42 #4 */
+       Msol = N + EPSILONg - RHOg;                             /* sec 46 #4 */

        adj360(&Msol);
        adj360(&Msol);

-       Ec = 360 / PI * ECCEN * sin(dtor(Msol));                /* sec 42 #5 */
-       LambdaSol = N + Ec + EPSILONg;                          /* sec 42 #6 */
+       Ec = 360 / PI * ECCEN * sin(dtor(Msol));                /* sec 46 #5 */
+       LambdaSol = N + Ec + EPSILONg;                          /* sec 46 #6 */

        adj360(&LambdaSol);
        adj360(&LambdaSol);

-       l = 13.1763966 * days + lzero;                          /* sec 61 #4 */
+       l = 13.1763966 * days + lzero;                          /* sec 65 #4 */

        adj360(&l);
        adj360(&l);

-       Mm = l - (0.1114041 * days) - Pzero;                    /* sec 61 #5 */
+       Mm = l - (0.1114041 * days) - Pzero;                    /* sec 65 #5 */

        adj360(&Mm);
        adj360(&Mm);

-       Nm = Nzero - (0.0529539 * days);                        /* sec 61 #6 */
+       Nm = Nzero - (0.0529539 * days);                        /* sec 65 #6 */

        adj360(&Nm);
        adj360(&Nm);

-       Ev = 1.2739 * sin(dtor(2*(l - LambdaSol) - Mm));        /* sec 61 #7 */
-       Ac = 0.1858 * sin(dtor(Msol));                          /* sec 61 #8 */
+       Ev = 1.2739 * sin(dtor(2*(l - LambdaSol) - Mm));        /* sec 65 #7 */
+       Ac = 0.1858 * sin(dtor(Msol));                          /* sec 65 #8 */

        A3 = 0.37 * sin(dtor(Msol));
        A3 = 0.37 * sin(dtor(Msol));

-       Mmprime = Mm + Ev - Ac - A3;                            /* sec 61 #9 */
-       Ec = 6.2886 * sin(dtor(Mmprime));                       /* sec 61 #10 */
-       A4 = 0.214 * sin(dtor(2 * Mmprime));                    /* sec 61 #11 */
-       lprime = l + Ev + Ec - Ac + A4;                         /* sec 61 #12 */
-       V = 0.6583 * sin(dtor(2 * (lprime - LambdaSol)));       /* sec 61 #13 */
-       ldprime = lprime + V;                                   /* sec 61 #14 */
-       D = ldprime - LambdaSol;                                /* sec 63 #2 */
-       return(50 * (1 - cos(dtor(D))));                        /* sec 63 #3 */
+       Mmprime = Mm + Ev - Ac - A3;                            /* sec 65 #9 */
+       Ec = 6.2886 * sin(dtor(Mmprime));                       /* sec 65 #10 */
+       A4 = 0.214 * sin(dtor(2 * Mmprime));                    /* sec 65 #11 */
+       lprime = l + Ev + Ec - Ac + A4;                         /* sec 65 #12 */
+       V = 0.6583 * sin(dtor(2 * (lprime - LambdaSol)));       /* sec 65 #13 */
+       ldprime = lprime + V;                                   /* sec 65 #14 */
+       D = ldprime - LambdaSol;                                /* sec 67 #2 */
+       return(50.0 * (1 - cos(dtor(D))));                      /* sec 67 #3 */

 }
 
 /*
  * dtor --
  *     convert degrees to radians
  */
 }
 
 /*
  * dtor --
  *     convert degrees to radians
  */

-double
-dtor(deg)
-       double deg;
+static double
+dtor(double deg)

 {
        return(deg * PI / 180);
 }
 {
        return(deg * PI / 180);
 }


@@ -184,9 +194,8 @@ dtor(deg)
  * adj360 --
  *     adjust value so 0 <= deg <= 360
  */
  * adj360 --
  *     adjust value so 0 <= deg <= 360
  */

-void
-adj360(deg)
-       double *deg;
+static void
+adj360(double *deg)

 {
        for (;;)
                if (*deg < 0)
 {
        for (;;)
                if (*deg < 0)


@@ -196,3 +205,74 @@ adj360(deg)
                else
                        break;
 }
                else
                        break;
 }

+
+#define        ATOI2(ar)       ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
+static time_t
+parsetime(char *p)
+{
+       struct tm *lt;
+       int bigyear;
+       int yearset = 0;
+       time_t tval;
+       char *t;
+       
+       for (t = p; *t; ++t) {
+               if (isdigit((unsigned char) *t))
+                       continue;
+               badformat();
+       }
+
+       tval = time(NULL);
+       lt = localtime(&tval);
+       lt->tm_sec = 0;
+       lt->tm_min = 0;
+
+       switch (strlen(p)) {
+       case 10:                                /* yyyy */
+               bigyear = ATOI2(p);
+               lt->tm_year = bigyear * 100 - 1900;
+               yearset = 1;
+               /* FALLTHROUGH */
+       case 8:                                 /* yy */
+               if (yearset) {
+                       lt->tm_year += ATOI2(p);
+               } else {
+                       lt->tm_year = ATOI2(p);
+                       if (lt->tm_year < 69)           /* hack for 2000 */
+                               lt->tm_year += 100;
+               }
+               /* FALLTHROUGH */
+       case 6:                                 /* mm */
+               lt->tm_mon = ATOI2(p);
+               if ((lt->tm_mon > 12) || !lt->tm_mon)
+                       badformat();
+               --lt->tm_mon;                   /* time struct is 0 - 11 */
+               /* FALLTHROUGH */
+       case 4:                                 /* dd */
+               lt->tm_mday = ATOI2(p);
+               if ((lt->tm_mday > 31) || !lt->tm_mday)
+                       badformat();
+               /* FALLTHROUGH */
+       case 2:                                 /* HH */
+               lt->tm_hour = ATOI2(p);
+               if (lt->tm_hour > 23)
+                       badformat();
+               break;
+       default:
+               badformat();
+       }
+       /* The calling code needs a valid tm_ydays and this is the easiest
+        * way to get one */
+       if ((tval = mktime(lt)) == -1)
+               errx(1, "specified date is outside allowed range");
+       return (tval);
+}
+
+static void
+badformat(void)
+{
+       warnx("illegal time format");
+       (void)fprintf(stderr, "usage: %s [[[[[cc]yy]mm]dd]HH]\n",
+           getprogname());
+       exit(EXIT_FAILURE);
+}