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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*** time-core.h -- our universe of times
*
* Copyright (C) 2011-2024 Sebastian Freundt
*
* Author: Sebastian Freundt <freundt@ga-group.nl>
*
* This file is part of dateutils.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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. Neither the name of the author nor the names of any contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
**/
#if !defined INCLUDED_time_core_h_
#define INCLUDED_time_core_h_
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include "boops.h"
#include "token.h"
#if defined __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef enum {
DT_TUNK,
#define DT_TUNK (dt_ttyp_t)(DT_TUNK)
DT_HMS,
#define DT_HMS (dt_ttyp_t)(DT_HMS)
DT_NTTYP,
} dt_ttyp_t;
/** hms
* hms times are just bog-standard hour, minute, second times */
typedef union {
uint64_t u:56;
struct {
#if BYTE_ORDER == BIG_ENDIAN
uint32_t u24:24;
uint32_t:32;
#elif BYTE_ORDER == LITTLE_ENDIAN
uint32_t:32;
uint32_t u24:24;
#else
# warning unknown byte order
#endif /* BYTE_ORDER */
} __attribute__((packed));
struct {
#if BYTE_ORDER == BIG_ENDIAN
uint64_t h:8;
uint64_t m:8;
uint64_t s:8;
uint64_t ns:32;
#elif BYTE_ORDER == LITTLE_ENDIAN
uint64_t ns:32;
uint64_t s:8;
uint64_t m:8;
uint64_t h:8;
#else
# warning unknown byte order
#endif /* BYTE_ORDER */
} __attribute__((packed));
} __attribute__((packed)) dt_hms_t;
/**
* Collection of all time types. */
struct dt_t_s {
struct {
dt_ttyp_t typ:2;
uint64_t dur:1;
uint64_t neg:1;
/* used for tadd operations and whatnot, range [-7,7] */
int64_t carry:4;
} __attribute__((packed));
union {
uint64_t u:56;
struct {
signed int sdur:26;
unsigned int nsdur:30;
} __attribute__((packed));
dt_hms_t hms;
} __attribute__((packed));
};
/* helpers */
#if !defined NANOS_PER_SEC
# define NANOS_PER_SEC (1000 * 1000 * 1000)
#endif /* !SECS_PER_MIN */
#if !defined SECS_PER_MIN
# define SECS_PER_MIN (60)
#endif /* !SECS_PER_MIN */
#if !defined MINS_PER_HOUR
# define MINS_PER_HOUR (60)
#endif /* !MINS_PER_HOUR */
#if !defined HOURS_PER_DAY
# define HOURS_PER_DAY (24)
#endif /* !HOURS_PER_DAY */
#if !defined SECS_PER_HOUR
# define SECS_PER_HOUR (SECS_PER_MIN * MINS_PER_HOUR)
#endif /* !SECS_PER_HOUR */
#if !defined SECS_PER_DAY
# define SECS_PER_DAY (SECS_PER_HOUR * HOURS_PER_DAY)
#endif /* !SECS_PER_DAY */
/* decls */
/**
* Like strptime() for our times.
* The format characters are _NOT_ compatible with strptime().
* If FMT is NULL the standard format for each calendric system is used,
* see format.texi or dateutils info page.
*
* If optional EP is non-NULL it will point to the end of the parsed
* date string. */
extern struct dt_t_s
dt_strpt(const char *str, const char *fmt, char **ep);
/**
* Like strftime() for our times. */
extern size_t
dt_strft(char *restrict buf, size_t bsz, const char *fmt, struct dt_t_s);
/**
* Add DURS seconds and CORR corrections to T. */
extern struct dt_t_s dt_tadd_s(struct dt_t_s t, int durs, int corr);
/**
* Compute the duration between T1 and T2 (as in T2 - T1). */
extern int dt_tdiff_s(struct dt_t_s t1, struct dt_t_s t2);
/**
* Compute the duration between T1 and T2 (as in T2 - T1). */
extern int64_t dt_tdiff_ns(struct dt_t_s t1, struct dt_t_s t2);
/**
* Compare two time values, yielding 0 if they are equal, -1 if T1 is older,
* 1 if T1 is younger than the T2. */
extern int dt_tcmp(struct dt_t_s t1, struct dt_t_s t2);
/**
* Like time() but always return the current UTC time. */
extern struct dt_t_s dt_time(void);
#if defined LIBDUT
/**
* Return the base date/time as struct dt_t_s.
* Defined in dt-core.c */
extern struct dt_t_s dt_get_tbase(void);
#endif /* LIBDUT */
/* some useful gimmicks, sort of */
static inline unsigned int
__secs_since_midnight(struct dt_t_s t)
{
return (t.hms.h * MINS_PER_HOUR + t.hms.m) * SECS_PER_MIN + t.hms.s;
}
#if defined __cplusplus
}
#endif /* __cplusplus */
#endif /* INCLUDED_time_core_h_ */
|
