| 1 | #include <stdio.h>
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| 2 | #include <math.h>
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| 3 | #include <ctype.h>
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| 4 | #include <stdlib.h>
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| 5 | #include <string.h>
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| 6 |
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| 7 | #include "P_.h"
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| 8 | #include "astro.h"
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| 9 | #include "preferences.h"
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| 10 |
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| 11 | /* sprint the variable a in sexagesimal format into out[].
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| 12 | * w is the number of spaces for the whole part.
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| 13 | * fracbase is the number of pieces a whole is to broken into; valid options:
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| 14 | * 360000: <w>:mm:ss.ss
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| 15 | * 36000: <w>:mm:ss.s
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| 16 | * 3600: <w>:mm:ss
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| 17 | * 600: <w>:mm.m
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| 18 | * 60: <w>:mm
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| 19 | */
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| 20 | void
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| 21 | fs_sexa (out, a, w, fracbase)
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| 22 | char *out;
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| 23 | double a;
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| 24 | int w;
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| 25 | int fracbase;
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| 26 | {
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| 27 | unsigned long n;
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| 28 | int d;
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| 29 | int f;
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| 30 | int m;
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| 31 | int s;
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| 32 | int isneg;
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| 33 |
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| 34 | /* save whether it's negative but do all the rest with a positive */
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| 35 | isneg = (a < 0);
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| 36 | if (isneg)
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| 37 | a = -a;
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| 38 |
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| 39 | /* convert to an integral number of whole portions */
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| 40 | n = (unsigned long)(a * fracbase + 0.5);
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| 41 | d = n/fracbase;
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| 42 | f = n%fracbase;
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| 43 |
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| 44 | /* form the whole part; "negative 0" is a special case */
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| 45 | if (isneg && d == 0)
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| 46 | (void) sprintf (out, "%*s-0", w-2, "");
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| 47 | else
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| 48 | (void) sprintf (out, "%*d", w, isneg ? -d : d);
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| 49 | out += w;
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| 50 |
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| 51 | /* do the rest */
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| 52 | switch (fracbase) {
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| 53 | case 60: /* dd:mm */
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| 54 | m = f/(fracbase/60);
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| 55 | (void) sprintf (out, ":%02d", m);
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| 56 | break;
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| 57 | case 600: /* dd:mm.m */
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| 58 | (void) sprintf (out, ":%02d.%1d", f/10, f%10);
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| 59 | break;
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| 60 | case 3600: /* dd:mm:ss */
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| 61 | m = f/(fracbase/60);
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| 62 | s = f%(fracbase/60);
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| 63 | (void) sprintf (out, ":%02d:%02d", m, s);
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| 64 | break;
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| 65 | case 36000: /* dd:mm:ss.s*/
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| 66 | m = f/(fracbase/60);
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| 67 | s = f%(fracbase/60);
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| 68 | (void) sprintf (out, ":%02d:%02d.%1d", m, s/10, s%10);
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| 69 | break;
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| 70 | case 360000: /* dd:mm:ss.ss */
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| 71 | m = f/(fracbase/60);
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| 72 | s = f%(fracbase/60);
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| 73 | (void) sprintf (out, ":%02d:%02d.%02d", m, s/100, s%100);
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| 74 | break;
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| 75 | default:
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| 76 | printf ("fs_sexa: unknown fracbase: %d\n", fracbase);
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| 77 | exit(1);
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| 78 | }
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| 79 | }
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| 80 |
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| 81 | /* put the given modified Julian date, jd, in out[] according to preference
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| 82 | * format.
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| 83 | */
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| 84 | void
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| 85 | fs_date (out, jd)
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| 86 | char out[];
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| 87 | double jd;
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| 88 | {
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| 89 | int p = pref_get (PREF_DATE_FORMAT);
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| 90 | int m, y;
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| 91 | double d;
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| 92 |
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| 93 | mjd_cal (jd, &m, &d, &y);
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| 94 | /* beware of %g rounding day up */
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| 95 | if ((d < 1.0 && d - floor(d) >= .9999995)
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| 96 | || (d < 10.0 && d - floor(d) >= .999995)
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| 97 | || (d >= 10.0 && d - floor(d) >= .99995))
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| 98 | mjd_cal (mjd_day(jd+0.5), &m, &d, &y);
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| 99 |
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| 100 | switch (p) {
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| 101 | case PREF_YMD:
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| 102 | (void) sprintf (out, "%4d/%02d/%02.6g", y, m, d);
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| 103 | break;
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| 104 | case PREF_DMY:
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| 105 | (void) sprintf (out, "%2.6g/%02d/%-4d", d, m, y);
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| 106 | break;
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| 107 | case PREF_MDY:
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| 108 | (void) sprintf (out, "%2d/%02.6g/%-4d", m, d, y);
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| 109 | break;
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| 110 | default:
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| 111 | printf ("fs_date: bad date pref: %d\n", p);
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| 112 | exit (1);
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| 113 | }
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| 114 | }
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| 115 |
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| 116 | /* scan a sexagesimal string and update a double. the string is of the form
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| 117 | * H:M:S. a negative value may be indicated by a '-' char before any
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| 118 | * component. All components may be integral or real. In addition to ':' the
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| 119 | * separator may also be '/' or ';' or ',' or '-'.
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| 120 | * any components not specified in bp[] are copied from old's.
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| 121 | * eg: ::10 only changes S
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| 122 | * 10 only changes H
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| 123 | * 10:0 changes H and M
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| 124 | */
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| 125 | void
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| 126 | f_scansex (o, bp, np)
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| 127 | double o; /* old value */
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| 128 | char bp[]; /* input string */
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| 129 | double *np; /* new value */
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| 130 | {
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| 131 | double oh, om, os;
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| 132 | double nh, nm, ns;
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| 133 | int nneg;
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| 134 | double tmp;
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| 135 | char c;
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| 136 |
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| 137 | /* fast macro to scan each segment of bp */
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| 138 | #define SCANSEX(new,old) \
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| 139 | if (*bp == '-') {nneg = 1; bp++;} \
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| 140 | if (sscanf (bp, "%lf", &new) != 1) new = old; \
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| 141 | while ((c=(*bp)) != '\0') { \
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| 142 | bp++; \
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| 143 | if (c==':' || c=='/' || c==';' || c==',' || c=='-') \
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| 144 | break; \
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| 145 | }
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| 146 |
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| 147 | /* get h:m:s components of o in case bp[] defers.
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| 148 | * and constrain to positive for now.
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| 149 | */
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| 150 | if (o < 0.0)
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| 151 | o = -o;
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| 152 | oh = floor(o);
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| 153 | tmp = (o - oh)*60.0;
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| 154 | om = floor(tmp);
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| 155 | os = (tmp - om)*60.0;
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| 156 |
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| 157 | /* round to small portion of a second to reduce differencing errors. */
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| 158 | if (os > 59.99999) {
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| 159 | os = 0.0;
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| 160 | if ((om += 1.0) >= 60.0) {
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| 161 | om = 0.0;
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| 162 | oh += 1.0;
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| 163 | }
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| 164 | }
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| 165 |
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| 166 | /* scan each component of the buffer */
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| 167 | while (*bp == ' ') bp++;
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| 168 | nneg = 0;
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| 169 | SCANSEX (nh, oh)
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| 170 | SCANSEX (nm, om)
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| 171 | SCANSEX (ns, os)
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| 172 |
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| 173 | /* back to hours */
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| 174 | tmp = ns/3600.0 + nm/60.0 + nh;
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| 175 | if (nneg)
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| 176 | tmp = -tmp;
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| 177 |
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| 178 | *np = tmp;
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| 179 | }
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| 180 |
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| 181 | /* crack a floating date string, bp, of the form X/Y/Z determined by the
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| 182 | * PREF_DATE_FORMAT preference into its components. allow the day to be a
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| 183 | * floating point number,
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| 184 | * a lone component is always a year if it contains a decimal point or pref
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| 185 | * is MDY or DMY and it is not a reasonable month or day value, respectively.
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| 186 | * leave any unspecified component unchanged.
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| 187 | * actually, the slashes may be anything but digits or a decimal point.
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| 188 | */
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| 189 | void
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| 190 | f_sscandate (bp, pref, m, d, y)
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| 191 | char *bp;
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| 192 | int pref; /* one of PREF_X for PREF_DATE_FORMAT */
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| 193 | int *m, *y;
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| 194 | double *d;
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| 195 | {
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| 196 | double comp[3]; /* the three components */
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| 197 | int set[3]; /* set[i] is 1 if component i is present */
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| 198 | int in; /* scan state: 1 while we are in a component */
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| 199 | int ncomp; /* incremented as each component is discovered */
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| 200 | int ndp; /* number of decimal points in last component */
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| 201 | char *bp0 = NULL, c;
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| 202 |
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| 203 | set[0] = set[1] = set[2] = 0;
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| 204 | ncomp = 0;
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| 205 | in = 0;
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| 206 | ndp = 0;
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| 207 |
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| 208 | /* scan the input string.
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| 209 | * '\0' counts as a component terminator too.
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| 210 | */
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| 211 | do {
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| 212 | /* here, *bp is the next character to be investigated */
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| 213 | c = *bp;
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| 214 | if (c == '.' || isdigit(c) || (c == '-' && !in)) {
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| 215 | /* found what passes for a floating point number */
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| 216 | if (in == 0) {
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| 217 | /* save the beginning of it in bp0 and init ndp */
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| 218 | bp0 = bp;
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| 219 | in = 1;
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| 220 | ndp = 0;
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| 221 | }
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| 222 | if (c == '.')
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| 223 | ndp++;
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| 224 | } else if (c != ' ') {
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| 225 | /* not in a number now ... */
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| 226 | if (in) {
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| 227 | /* ... but we *were* in a number, so it counts */
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| 228 | if (ncomp >= 3)
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| 229 | return; /* too many components.. just bail */
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| 230 | comp[ncomp] = atod (bp0);
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| 231 | set[ncomp] = 1;
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| 232 | in = 0;
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| 233 | }
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| 234 |
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| 235 | /* regardless, a non-blank non-float means another component */
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| 236 | ncomp++;
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| 237 | }
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| 238 | bp++;
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| 239 | } while (c);
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| 240 |
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| 241 | /* it's a decimal year if there is exactly one component and
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| 242 | * it contains a decimal point
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| 243 | * or we are in MDY format and it's not in the range 1..12
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| 244 | * or we are in DMY format and it's not int the rangle 1..31
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| 245 | */
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| 246 | if (ncomp == 1 &&
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| 247 | (ndp > 0
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| 248 | || (pref == PREF_MDY && !(comp[0] >= 1 && comp[0] <= 12))
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| 249 | || (pref == PREF_DMY && !(comp[0] >= 1 && comp[0] <= 31)))) {
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| 250 | double Mjd;
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| 251 | year_mjd (comp[0], &Mjd);
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| 252 | mjd_cal (Mjd, m, d, y);
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| 253 | return;
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| 254 | }
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| 255 |
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| 256 | switch (pref) {
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| 257 | case PREF_MDY:
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| 258 | if (set[0]) *m = (int)comp[0];
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| 259 | if (set[1]) *d = comp[1];
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| 260 | if (set[2]) *y = (int)comp[2];
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| 261 | break;
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| 262 | case PREF_YMD:
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| 263 | if (set[0]) *y = (int)comp[0];
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| 264 | if (set[1]) *m = (int)comp[1];
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| 265 | if (set[2]) *d = comp[2];
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| 266 | break;
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| 267 | case PREF_DMY:
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| 268 | if (set[0]) *d = comp[0];
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| 269 | if (set[1]) *m = (int)comp[1];
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| 270 | if (set[2]) *y = (int)comp[2];
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| 271 | break;
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| 272 | }
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| 273 | }
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| 274 |
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| 275 | /* given a string of the form xx:mm[:ss] or xx:mm.dd, convert it to a double at
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| 276 | * *dp. actually, ':' may also be ';', '/' or ',' too. all components may be
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| 277 | * floats.
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| 278 | * return -1 if trouble, else 0
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| 279 | */
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| 280 | int
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| 281 | scansex (str, dp)
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| 282 | char *str;
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| 283 | double *dp;
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| 284 | {
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| 285 | double x, m = 0.0, s = 0.0;
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| 286 | int isneg;
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| 287 | int nf;
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| 288 |
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| 289 | while (isspace(*str))
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| 290 | str++;
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| 291 | if (*str == '-') {
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| 292 | isneg = 1;
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| 293 | str++;
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| 294 | } else
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| 295 | isneg = 0;
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| 296 |
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| 297 | nf = sscanf (str, "%lf%*[:;/,]%lf%*[:;/,]%lf", &x, &m, &s);
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| 298 | if (nf < 1)
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| 299 | return (-1);
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| 300 | *dp = x + m/60.0 + s/3600.0;
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| 301 | if (isneg)
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| 302 | *dp = - *dp;
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| 303 | return (0);
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| 304 | }
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| 305 |
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| 306 | /* For RCS Only -- Do Not Edit */
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| 307 | static char *rcsid[2] = {(char *)rcsid, "@(#) $RCSfile: formats.c,v $ $Date: 2001-10-22 12:08:27 $ $Revision: 1.2 $ $Name: not supported by cvs2svn $"};
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