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/*
* date.h
*
* $Id$
*
* Date support
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2018 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 "widv.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))
#ifndef DEBUG
#undef DATE_DEBUG
#endif
#ifdef DATE_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. timezoneless bit (1 if timezone is missing but T presents in original xsd data)
* 3. hour - 0-23 5 bit
* 4. minute 0-59 6 bit
* 5. second 0-59 6 bit
* 6. fraction 0-999.999 20 bit (i.e., whole thousands of nanoseconds are stored)
* 7. type of value 0-4 (could be more later)
* 8. timezone for printing minus 840 to plus 840 sign bit and 10 bits
*
* ...:...0...:...1...:...2...:...3...:...4...:...5...:...6...:...7...:...8...:...9
* --ddddddddddddddddddddddL<<hhhhhmmmmmmssssssffffffffffffffffffffTTT<<-zzzzzzzzzz
*
*/
#define DT_CONTAINS_GARBAGE(dt) \
((CUC (dt, 3) & 0x60) | \
(CUC (dt, 8) & 0x18) )
#define DT_ZAP(dt) memset ((dt), 0, 10)
#define DT_DAY(dt) \
((int32)((CUC (dt, 0) << 16) | \
(CUC (dt, 1) << 8) | \
CUC (dt, 2) | ((CUC (dt, 0) & 0x80) ? 0xff000000 : 0)))
/* unsigned day, dt sorts as unsigned binary string for index, so when using numeric offset it is also unsigned for dates that have the high bit set */
#define DT_UDAY(dt) \
((int32)((CUC (dt, 0) << 16) | \
(CUC (dt, 1) << 8) | \
CUC (dt, 2)))
#define DT_TZL(dt) \
(CUC(dt, 3) >> 7)
#define DT_HOUR(dt) \
(CUC(dt, 3) & 0x1f)
#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_TZL(dt, l) \
(UC(dt, 3) &= 0x7F, \
UC(dt, 3) |= ((l) ? 0x80 : 0) )
#define DT_SET_HOUR(dt, h) \
(UC(dt, 3) &= 0x80, \
UC(dt, 3) |= ((h) & 0x1f) )
#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_NOAUDIT(dt, type) do { \
UC (dt, 8) = _UC (_UC (UC (dt, 8) & 0x07) | _UC ((type) << 5)); } while (0)
#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 0x7ffefd
#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 \
) \
))
#define SPERDAY (24*60*60)
#define DT_CAST_TO_TOTAL_SECONDS(dt) ((boxint)DT_DAY (dt) * 24 * 60 * 60 + (boxint)DT_HOUR (dt) * 60 * 60 + (boxint)DT_MINUTE (dt) * 60 + DT_SECOND (dt))
#ifdef WORDS_BIGENDIAN
#define memcpy_dt(tgt, src) memcpy (tgt, src, DT_LENGTH)
#define memcmp_dt(dt1, dt2) \
{ if (memcmp (dt1, dt2, DT_CMP_LENGTH)) goto neq;}
#else
#define memcpy_dt(tgt1, src1) \
{ db_buf_t __tgt = (db_buf_t)tgt1, __src = (db_buf_t)src1; \
*(int64*)(__tgt) = *(int64*)(__src); \
*(short*)(__tgt + 8) = *(short*)((__src) + 8); \
}
#define memcmp_dt(dt1, dt2, neq) \
{if (*(int64*)(dt1) != *(int64*)(dt2)) goto neq;}
#endif
#endif /* _DATE_H */
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