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
|
/*
* date.h
*
* $Id: date.h,v 1.4.2.2 2011/05/10 12:18:50 source Exp $
*
* Date support
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2006 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef _DATE_H
#define _DATE_H
#include "odbcinc.h"
typedef unsigned char datetime_t[DT_LENGTH];
/*#define NO_DT_TYPE_IN_TZ*/
#define CUC(p, n) ((const unsigned char *)p)[n]
#define UC(p, n) ((unsigned char *)p)[n]
#define _UC(p) ((unsigned char)(p))
#define CSIGNC(p, n) ((const signed char *)p)[n]
#define SIGNC(p, n) ((signed char *)p)[n]
#define _SIGNC(p) ((signed char)(p))
#ifdef DEBUG
extern void dt_audit_fields (char *dt);
#define DT_AUDIT_FIELDS(dt) dt_audit_fields(dt)
#else
#define DT_AUDIT_FIELDS(dt)
#endif
/* While TIMESTAMP_STRUCT value is by default in dt_local_tz timezone, DV_DATE_OBJ is always in UTC.
* Its timezone field is SOLELY for printing with timezone and ignored by datediff and the like.
* DV_DATE_OBJ layout:
*
* 1. day - 0-3.950.000 - 22 bit
* 2. hour - 0-23 5 bit
* 3. minute 0-59 6 bit
* 4. second 0-59 6 bit
* 5. fraction 0-999.999 20 bit (i.e., whole thousands of nanoseconds are stored)
* 6. type of value 0-4 (could be more later)
* 7. timezone for printing minus 840 to plus 840 sign bit and 10 bits
*
* ...:...0...:...1...:...2...:...3...:...4...:...5...:...6...:...7...:...8...:...9
* <<dddddddddddddddddddddd<<<hhhhh<mmmmmssssssffffffffffffffffffff<<TTT-zzzzzzzzzz
*
*/
#define DT_DAY(dt) \
((int32)((CUC (dt, 0) << 16) | \
(CUC (dt, 1) << 8) | \
CUC (dt, 2) | ((CUC (dt, 0) & 0x80) ? 0xff000000 : 0)))
#define DT_HOUR(dt) \
CUC(dt, 3)
#define DT_MINUTE(dt) \
(CUC (dt, 4) >> 2)
#define DT_SECOND(dt) \
(((CUC (dt, 4) & 0x3) << 4) | \
((CUC (dt, 5)) >> 4))
#define DT_FRACTION(dt) \
(1000 * (((CUC (dt, 5) & 0x0F) << 16) | \
(CUC (dt, 6) << 8) | \
CUC (dt, 7)))
#ifdef NO_DT_TYPE_IN_TZ
#define DT_TZ(dt) \
((((int)CSIGNC (dt, 8)) << 8) | CUC (dt, 9))
#define DT_DT_TYPE(dt) DT_TYPE_DATETIME
#else
#define DT_TZ(dt) \
((((int) _SIGNC ( \
(CUC (dt,8) & 0x04) ? \
_UC (_UC (CUC (dt,8) & 0x07) | 0xf8) : \
_UC (CUC (dt,8) & 0x03) \
)) << 8 ) | CUC (dt, 9))
#define DT_DT_TYPE(dt) \
(int)(((CUC (dt, 8) & 0xfc) == 0 || \
(CUC (dt, 8) & 0xfc) == 0xfc) ? DT_TYPE_DATETIME : \
(CUC (dt, 8) >> 5))
#endif
#define DT_SET_DAY(dt, y) \
((UC (dt, 0) = _UC (((y) >> 16) & 0xFF), \
UC (dt, 1) = _UC (((y) >> 8) & 0xFF), \
UC (dt, 2) = _UC ((y) & 0xFF)))
#define DT_SET_HOUR(dt, h) \
UC(dt, 3) = _UC (h)
#define DT_SET_MINUTE(dt, m) \
(UC (dt, 4) &= 0x3, \
UC (dt, 4) |= (m) << 2)
#define DT_SET_SECOND(dt, m) \
(UC (dt, 4) &= 0xFC, \
UC (dt, 4) |= ((m) >> 4) & 0x3, \
UC (dt, 5) &= 0x0F, \
UC (dt, 5) |= ((m) & 0x0F) << 4)
#define DT_SET_FRACTION(dt, f) \
(UC (dt, 5) &= 0xF0, \
UC (dt, 5) |= (((f)/1000) >> 16) & 0x0F, \
UC (dt, 6) = _UC (((f)/1000) >> 8), \
UC (dt, 7) = _UC (((f)/1000) & 0xFF))
#ifdef NO_DT_TYPE_IN_TZ
#define DT_SET_TZ(dt, tz) \
(SIGNC (dt, 8) = _SIGNC ((tz) >> 8), \
SIGNC (dt, 9) = _SIGNC ((tz) & 0xFF))
#define DT_SET_COMPAT_TZ(dt, tz) DT_SET_TZ(dt, tz)
#define DT_SET_DT_TYPE(dt, type) SIGNC (dt, 8) = SIGNC (dt, 8)
#else
#define DT_SET_TZ(dt, tz) \
(UC (dt, 8) = (_UC (_UC (UC (dt, 8) >> 3) << 3) | (_UC ((tz) >> 8) & 0x07)), \
UC (dt, 9) = _UC ((tz) & 0xFF))
#define DT_SET_DT_TYPE(dt, type) do { \
UC (dt, 8) = _UC (_UC (UC (dt, 8) & 0x07) | _UC ((type) << 5)); \
DT_AUDIT_FIELDS(dt); } while (0)
#define DT_SET_COMPAT_TZ(dt, tz) \
(SIGNC (dt, 8) = _SIGNC ((tz) >> 8), \
SIGNC (dt, 9) = _SIGNC ((tz) & 0xFF))
#endif
/* arbitrary day component of time-only DV_DATETIME */
#ifdef DEBUG
#define DAY_ZERO 0xfffefd
#else
#define DAY_ZERO (1999 * 365)
#endif
#define DT_TYPE_COMPAT_POSITIVE_TZ 0
#define DT_TYPE_DATETIME 1
#define DT_TYPE_DATE 2
#define DT_TYPE_TIME 3
#define DT_TYPE_COMPAT_NEGATIVE_TZ 4
#define SET_DT_TYPE_BY_DTP(dt,dtp) \
DT_SET_DT_TYPE (dt, \
(dtp == DV_DATE ? \
DT_TYPE_DATE : \
(dtp == DV_TIME ? \
DT_TYPE_TIME : \
DT_TYPE_DATETIME \
) \
))
#endif /* _DATE_H */
|
