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fis-gtm/sr_port/op_fnzdate.c

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8.3 KiB
C
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/****************************************************************
* *
* Copyright 2001, 2011 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "xfer_enum.h"
#include "stringpool.h"
#include "op.h"
#include "mvalconv.h"
GBLREF spdesc stringpool;
GBLREF boolean_t gtm_utf8_mode;
error_def(ERR_ZDATEFMT);
error_def(ERR_ZDATEBADDATE);
error_def(ERR_ZDATEBADTIME);
#define ADJUST_TO_1900 (COMMON_LEAP_CYCLE - 1)
#define BASE_YEAR 1840 /* from the M standard */
#define COMMON_LEAP_CYCLE 4
#define DAYS_BASE_TO_1900 (((1900 - BASE_YEAR) / COMMON_LEAP_CYCLE * DAYS_IN_FOUR_YEARS) - 1 + DAYS_BEFORE_LEAP)
#define DAYS_BEFORE_LEAP (MAX_DAYS_IN_MONTH + MIN_DAYS_IN_MONTH)
#define DAYS_IN_CENTURY (DAYS_IN_FOUR_YEARS * 25) /* right for leap century but on high for others */
#define DAYS_IN_FOUR_YEARS ((DAYS_MOST_YEARS * COMMON_LEAP_CYCLE) + 1)
#define DAYS_IN_WEEK 7
#define DAYS_MOST_YEARS 365
#define DEFAULT1 "MM/DD/YY"
#define DEFAULT2 "DD-MON-YY"
#define DEFAULT3 "MM/DD/YEAR"
#define HOURS_PER_AM_OR_PM 12
#define LEN_OF_3_CHAR_ABBREV 3
#define MAX_DATE 364570088 /* 31-Dec-999999 */
#define MAX_DAYS_IN_MONTH 31
#define MAX_TIME ((SECONDS_PER_HOUR * 24) - 1) /* a second before midnight */
#define MAX_YEAR 999999
#define MAX_YEAR_DIGITS 6
#define MIN_DATE (-DAYS_MOST_YEARS) /* 01-JAN-1840 */
#define MIN_DAYS_IN_MONTH 28
#define MINUTES_PER_HOUR 60
#define MONTHS_IN_YEAR 12
#define PIVOT_MILLENIUM 2000
#define SECONDS_PER_HOUR (SECONDS_PER_MINUTE * MINUTES_PER_HOUR)
#define SECONDS_PER_MINUTE 60
#define ZDATE_MAX_LEN 64
void op_fnzdate(mval *src, mval *fmt, mval *mo_str, mval *day_str, mval *dst)
{
unsigned char ch, *fmtptr, *fmttop, *i, *outptr, *outtop, *outpt1;
int cent, day, dow, month, nlen, outlen, time, year;
unsigned int n;
mval temp_mval;
static readonly unsigned char montab[] = {31,28,31,30,31,30,31,31,30,31,30,31};
static readonly unsigned char default1[] = DEFAULT1;
static readonly unsigned char default2[] = DEFAULT2;
static readonly unsigned char default3[] = DEFAULT3;
static readonly unsigned char defmonlst[] = "JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC";
static readonly unsigned char defdaylst[] = "SUNMONTUEWEDTHUFRISAT";
#if defined(BIGENDIAN)
static readonly int comma = (((int)',') << 24);
#else
static readonly int comma = ',';
#endif
DCL_THREADGBL_ACCESS;
SETUP_THREADGBL_ACCESS;
MV_FORCE_NUM(src);
MV_FORCE_STR(fmt);
MV_FORCE_STR(mo_str);
MV_FORCE_STR(day_str);
ENSURE_STP_FREE_SPACE(ZDATE_MAX_LEN);
time = 0;
outlen = src->str.len;
if ((src->mvtype & MV_STR) && (src->mvtype & MV_NUM_APPROX))
{
for (outptr = (unsigned char *)src->str.addr, outtop = outptr + outlen; outptr < outtop; )
{
if (',' == *outptr++)
{
outlen = outptr - (unsigned char *)src->str.addr - 1;
temp_mval.mvtype = MV_STR;
temp_mval.str.addr = (char *)outptr;
temp_mval.str.len = INTCAST(outtop - outptr);
s2n(&temp_mval);
time = MV_FORCE_INTD(&temp_mval);
if ((0 > time) || (MAX_TIME < time))
rts_error(VARLSTCNT(4) ERR_ZDATEBADTIME, 2, temp_mval.str.len, temp_mval.str.addr);
break;
}
}
}
day = (int)MV_FORCE_INTD(src);
if ((MAX_DATE < day) || (MIN_DATE > day))
{
MV_FORCE_STR(src);
rts_error(VARLSTCNT(4) ERR_ZDATEBADDATE, 2, outlen, src->str.addr);
}
day += DAYS_MOST_YEARS;
dow = ((day + ADJUST_TO_1900) % DAYS_IN_WEEK) + 1;
for (cent = DAYS_BASE_TO_1900, n = ADJUST_TO_1900; cent < day; cent += DAYS_IN_CENTURY, n++)
day += (0 < (n % COMMON_LEAP_CYCLE));
year = day / DAYS_IN_FOUR_YEARS;
day = day - (year * DAYS_IN_FOUR_YEARS);
year = (year * COMMON_LEAP_CYCLE) + BASE_YEAR;
if (DAYS_BEFORE_LEAP == day)
{
day = MIN_DAYS_IN_MONTH + 1;
month = 2;
} else
{
if (DAYS_BEFORE_LEAP < day)
day--;
month = day / DAYS_MOST_YEARS;
year += month;
day -= (month * DAYS_MOST_YEARS);
for (i = montab; day >= *i; day -= *i++)
;
month = (int)((i - montab)) + 1;
day++;
assert((0 < month) && (MONTHS_IN_YEAR >= month));
}
if ((0 == fmt->str.len) || ((1 == fmt->str.len) && ('1' == *fmt->str.addr)))
{
if (!TREF(zdate_form) || ((1 == TREF(zdate_form)) && (PIVOT_MILLENIUM > year)))
{
fmtptr = default1;
fmttop = fmtptr + STR_LIT_LEN(DEFAULT1);
} else
{
fmtptr = default3;
fmttop = fmtptr + STR_LIT_LEN(DEFAULT3);
}
} else if ((1 == fmt->str.len) && ('2' == *fmt->str.addr))
{
fmtptr = default2;
fmttop = fmtptr + STR_LIT_LEN(DEFAULT2);
} else
{
fmtptr = (unsigned char *)fmt->str.addr;
fmttop = fmtptr + fmt->str.len;
}
outlen = (int)(fmttop - fmtptr);
if (outlen >= ZDATE_MAX_LEN)
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
outptr = stringpool.free;
outtop = outptr + ZDATE_MAX_LEN;
temp_mval.mvtype = MV_STR;
assert(0 <= time);
nlen = 0;
while (fmtptr < fmttop)
{
switch (ch = *fmtptr++) /* NOTE assignment */
{
case '/':
case ':':
case '.':
case ',':
case '-':
case ' ':
case '*':
case '+':
case ';':
*outptr++ = ch;
continue;
case 'M':
ch = *fmtptr++;
if ('M' == ch)
{
n = month;
nlen = 2;
break;
}
if (('O' != ch) || ('N' != *fmtptr++))
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
if (0 == mo_str->str.len)
{
temp_mval.str.addr = (char *)&defmonlst[(month - 1) * LEN_OF_3_CHAR_ABBREV];
temp_mval.str.len = LEN_OF_3_CHAR_ABBREV;
nlen = -LEN_OF_3_CHAR_ABBREV;
} else
{
UNICODE_ONLY(gtm_utf8_mode ? op_fnp1(mo_str, comma, month, &temp_mval) :
op_fnzp1(mo_str, comma, month, &temp_mval));
VMS_ONLY(op_fnzp1(mo_str, comma, month, &temp_mval, TRUE));
nlen = -temp_mval.str.len;
outlen += - LEN_OF_3_CHAR_ABBREV - nlen;
if (outlen >= ZDATE_MAX_LEN)
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
}
break;
case 'D':
ch = *fmtptr++;
if ('D' == ch)
{
n = day;
nlen = 2;
break;
}
if (('A' != ch) || ('Y' != *fmtptr++))
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
if (0 == day_str->str.len)
{
temp_mval.str.addr = (char *)&defdaylst[(dow - 1) * LEN_OF_3_CHAR_ABBREV];
temp_mval.str.len = LEN_OF_3_CHAR_ABBREV;
nlen = -LEN_OF_3_CHAR_ABBREV;
} else
{
UNICODE_ONLY(gtm_utf8_mode ? op_fnp1(day_str, comma, dow, &temp_mval)
: op_fnzp1(day_str, comma, dow, &temp_mval));
VMS_ONLY(op_fnzp1(day_str, comma, dow, &temp_mval, TRUE));
nlen = -temp_mval.str.len;
outlen += - LEN_OF_3_CHAR_ABBREV - nlen;
if (outlen >= ZDATE_MAX_LEN)
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
}
break;
case 'Y':
ch = *fmtptr++;
n = year;
if ('Y' == ch)
{
for (nlen = 2; (MAX_YEAR_DIGITS >=nlen) && fmtptr < fmttop; ++nlen, fmtptr++)
if ('Y' != *fmtptr)
break;
} else
{
if (('E' != ch) || ('A' != *fmtptr++) || ('R' != *fmtptr++))
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
nlen = 4;
}
break;
case '1':
if ('2' != *fmtptr++)
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
nlen = 2;
n = time / SECONDS_PER_HOUR;
n = ((n + HOURS_PER_AM_OR_PM - 1) % HOURS_PER_AM_OR_PM) + 1;
break;
case '2':
if ('4' != *fmtptr++)
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
nlen = 2;
n = time / SECONDS_PER_HOUR;
break;
case '6':
if ('0' != *fmtptr++)
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
nlen = 2;
n = time;
n /= MINUTES_PER_HOUR;
n %= MINUTES_PER_HOUR;
break;
case 'S':
if ('S' != *fmtptr++)
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
nlen = 2;
n = time % SECONDS_PER_MINUTE;
break;
case 'A':
if ('M' != *fmtptr++)
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
*outptr++ = (time < (HOURS_PER_AM_OR_PM * SECONDS_PER_HOUR)) ? 'A' : 'P';
*outptr++ = 'M';
continue;
default:
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
}
if (nlen > 0)
{
outptr += nlen;
outpt1 = outptr;
while (nlen-- > 0)
{
*--outpt1 = '0' + (n % 10);
n /= 10;
}
} else
{
outpt1 = (unsigned char *)temp_mval.str.addr;
while (nlen++ < 0)
*outptr++ = *outpt1++;
}
}
if (fmtptr > fmttop)
rts_error(VARLSTCNT(1) ERR_ZDATEFMT);
dst->mvtype = MV_STR;
dst->str.addr = (char *)stringpool.free;
dst->str.len = INTCAST((char *)outptr - dst->str.addr);
stringpool.free = outptr;
return;
}
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