Astro/io.c at main · efalk/Astro · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171

#include <stdio.h>
#include <sys/types.h>
#include <time.h>
#include <math.h>

#include "astro.h"

/* I/O routines.
 *
 *
 * char *
 * julian2ymdStr(double jdate)
 *  Convert Julian date to e.g. "11-Jul-2022"
 *
 * char *
 * julian2hmsStr(double jdate)
 *  Convert Julian date to e.g. "16:04:16"
 *
 * char *
 * julian2str(double jdate)
 *  Convert Julian date to e.g. "11-Jul-2022 16:04:16"
 *
 * char *
 * deg2dmsStr(double degrees)
 *	Convert degrees to dd°mm'ss.s
 *
 * char *
 * deg2dmStr(double degrees)
 *	Convert degrees to dd°mm.mm
 *
 * char *
 * hours2hmsStr(double hours)
 *	Convert hours to hh:mm:ss.s
 *
 * char *
 * hours2hmStr(double hours)
 *	Convert hours to hh:mm.mm
 *
 */


/* A word of explanation:  I defined a round-robin of four character
 * buffers.  Each function that returns a string value uses the next
 * buffer in turn.  Thus, you can call these functions four times
 * before any buffer becomes invalid.  This is very useful when you
 * use these functions inside a printf().
 */

#define	RVALN	4
static	char	rvals[RVALN][40] ;
static	int	rvalidx = 0 ;
#define	rval	(rvals[rvalidx])
#define	rvalNext()	(rvalidx = (rvalidx+1) % RVALN)

char *
julian2ymdStr(jdate)
	double	jdate ;
{
	int	y,m,d ;
static	char	*mnames[] = { "", "Jan", "Feb", "Mar", "Apr", "May",
		  "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"} ;

	rvalNext() ;
	julian2date(jdate, &y,&m,&d) ;
	snprintf(rval, sizeof(rval), "%d-%s-%d", d,mnames[m],y) ;
	return rval ;
}


char *
julian2hmsStr(jdate)
	double	jdate ;
{
	int	y,m,d, hh,mm ;
	double	ss ;
#if 0
static	char	*mnames[] = { "", "Jan", "Feb", "Mar", "Apr", "May",
		  "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"} ;
#endif

	rvalNext() ;
	julian2time(jdate, &y,&m,&d, &hh,&mm,&ss) ;
	snprintf(rval, sizeof(rval),
	  "%d:%2.2d:%2.2d.%d", hh,mm,(int)ss, (int)(ss*10+.5)%10) ;
	return rval ;
}


char *
julian2str(jdate)
	double	jdate ;
{
	int	y,m,d, hh,mm ;
	double	ss ;
static	char	*mnames[] = { "", "Jan", "Feb", "Mar", "Apr", "May",
		  "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"} ;

	rvalNext() ;
	julian2time(jdate, &y,&m,&d, &hh,&mm,&ss) ;
	snprintf(rval, sizeof(rval),
	  "%d-%s-%d %d:%2.2d:%2.2d", d,mnames[m],y, hh,mm,(int)ss) ;
	return rval ;
}


char *
deg2dmsStr(degrees)
	double degrees ;
{
	int	d,m,s,ss ;

	rvalNext() ;
	d = degrees ;
	m = (int)(degrees * 60) % 60 ;
	s = (int)(degrees * 3600) % 60 ;
	ss = (int)(degrees * 36000 + .5) % 10 ;
	snprintf(rval, sizeof(rval), "%3.3d°%2.2d'%2.2d.%1.1d", d,m,s,ss) ;
	return rval ;
}


char *
deg2dmStr(degrees)
	double	degrees ;
{
	int	d,m,mm ;
	int	sign = 0 ;

	rvalNext() ;
	if( degrees < 0. ) {
	  sign = 1 ;
	  degrees = -degrees ;
	}
	d = degrees ;
	m = (int)(degrees * 60) % 60 ;
	mm = (int)(degrees * 6000 + .5) % 100 ;
	snprintf(rval, sizeof(rval), "%s%d°%2.2d.%2.2d", sign?"-":"", d,m,mm) ;
	return rval ;
}


char *
hours2hmsStr(hours)
	double hours ;
{
	int	h,m,s,ss ;

	rvalNext() ;
	h = hours ;
	m = (int)(hours * 60) % 60 ;
	s = (int)(hours * 3600) % 60 ;
	ss = (int)(hours * 36000 + .5) % 10 ;
	snprintf(rval, sizeof(rval), "%2d:%2.2d:%2.2d.%1.1d", h,m,s,ss) ;
	return rval ;
}


char *
hours2hmStr(hours)
	double	hours ;
{
	int	h,m,mm ;

	rvalNext() ;
	h = hours ;
	m = (int)(hours * 60) % 60 ;
	mm = (int)(hours * 6000 + .5) % 100 ;
	snprintf(rval, sizeof(rval), "%2d:%2.2d.%2.2d", h,m,mm) ;
	return rval ;
}