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dt_common.c File Reference
#include "postgres_fe.h"
#include <time.h>
#include <ctype.h>
#include <math.h>
#include "common/string.h"
#include "dt.h"
#include "pgtypes_timestamp.h"
#include "pgtypeslib_extern.h"
Include dependency graph for dt_common.c:

Go to the source code of this file.

Typedefs

typedef long AbsoluteTime
 

Functions

static const datetkndatebsearch (const char *key, const datetkn *base, unsigned int nel)
 
int DecodeUnits (int field, char *lowtoken, int *val)
 
int date2j (int y, int m, int d)
 
void j2date (int jd, int *year, int *month, int *day)
 
static int DecodeSpecial (int field, char *lowtoken, int *val)
 
void EncodeDateOnly (struct tm *tm, int style, char *str, bool EuroDates)
 
void TrimTrailingZeros (char *str)
 
void EncodeDateTime (struct tm *tm, fsec_t fsec, bool print_tz, int tz, const char *tzn, int style, char *str, bool EuroDates)
 
int GetEpochTime (struct tm *tm)
 
static void abstime2tm (AbsoluteTime _time, int *tzp, struct tm *tm, char **tzn)
 
void GetCurrentDateTime (struct tm *tm)
 
void dt2time (double jd, int *hour, int *min, int *sec, fsec_t *fsec)
 
static int DecodeNumberField (int len, char *str, int fmask, int *tmask, struct tm *tm, fsec_t *fsec, bool *is2digits)
 
static int DecodeNumber (int flen, char *str, int fmask, int *tmask, struct tm *tm, fsec_t *fsec, bool *is2digits, bool EuroDates)
 
static int DecodeDate (char *str, int fmask, int *tmask, struct tm *tm, bool EuroDates)
 
int DecodeTime (char *str, int *tmask, struct tm *tm, fsec_t *fsec)
 
static int DecodeTimezone (char *str, int *tzp)
 
static int DecodePosixTimezone (char *str, int *tzp)
 
int ParseDateTime (char *timestr, char *lowstr, char **field, int *ftype, int *numfields, char **endstr)
 
int DecodeDateTime (char **field, int *ftype, int nf, int *dtype, struct tm *tm, fsec_t *fsec, bool EuroDates)
 
static char * find_end_token (char *str, char *fmt)
 
static int pgtypes_defmt_scan (union un_fmt_comb *scan_val, int scan_type, char **pstr, char *pfmt)
 
int PGTYPEStimestamp_defmt_scan (char **str, char *fmt, timestamp *d, int *year, int *month, int *day, int *hour, int *minute, int *second, int *tz)
 

Variables

const int day_tab [2][13]
 
static const datetkn datetktbl []
 
static const datetkn deltatktbl []
 
static const unsigned int szdatetktbl = lengthof(datetktbl)
 
static const unsigned int szdeltatktbl = lengthof(deltatktbl)
 
static const datetkndatecache [MAXDATEFIELDS] = {NULL}
 
static const datetkndeltacache [MAXDATEFIELDS] = {NULL}
 
char * months [] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL}
 
char * days [] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", NULL}
 
char * pgtypes_date_weekdays_short [] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL}
 
char * pgtypes_date_months [] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December", NULL}
 

Typedef Documentation

◆ AbsoluteTime

typedef long AbsoluteTime

Definition at line 18 of file dt_common.c.

Function Documentation

◆ abstime2tm()

static void abstime2tm ( AbsoluteTime  _time,
int *  tzp,
struct tm tm,
char **  tzn 
)
static

Definition at line 973 of file dt_common.c.

974 {
975  time_t time = (time_t) _time;
976  struct tm *tx;
977  struct tm tmbuf;
978 
979  errno = 0;
980  if (tzp != NULL)
981  tx = localtime_r(&time, &tmbuf);
982  else
983  tx = gmtime_r(&time, &tmbuf);
984 
985  if (!tx)
986  {
987  errno = PGTYPES_TS_BAD_TIMESTAMP;
988  return;
989  }
990 
991  tm->tm_year = tx->tm_year + 1900;
992  tm->tm_mon = tx->tm_mon + 1;
993  tm->tm_mday = tx->tm_mday;
994  tm->tm_hour = tx->tm_hour;
995  tm->tm_min = tx->tm_min;
996  tm->tm_sec = tx->tm_sec;
997  tm->tm_isdst = tx->tm_isdst;
998 
999 #if defined(HAVE_STRUCT_TM_TM_ZONE)
1000  tm->tm_gmtoff = tx->tm_gmtoff;
1001  tm->tm_zone = tx->tm_zone;
1002 
1003  if (tzp != NULL)
1004  {
1005  /*
1006  * We have a brute force time zone per SQL99? Then use it without
1007  * change since we have already rotated to the time zone.
1008  */
1009  *tzp = -tm->tm_gmtoff; /* tm_gmtoff is Sun/DEC-ism */
1010 
1011  /*
1012  * FreeBSD man pages indicate that this should work - tgl 97/04/23
1013  */
1014  if (tzn != NULL)
1015  {
1016  /*
1017  * Copy no more than MAXTZLEN bytes of timezone to tzn, in case it
1018  * contains an error message, which doesn't fit in the buffer
1019  */
1020  strlcpy(*tzn, tm->tm_zone, MAXTZLEN + 1);
1021  if (strlen(tm->tm_zone) > MAXTZLEN)
1022  tm->tm_isdst = -1;
1023  }
1024  }
1025  else
1026  tm->tm_isdst = -1;
1027 #elif defined(HAVE_INT_TIMEZONE)
1028  if (tzp != NULL)
1029  {
1031 
1032  if (tzn != NULL)
1033  {
1034  /*
1035  * Copy no more than MAXTZLEN bytes of timezone to tzn, in case it
1036  * contains an error message, which doesn't fit in the buffer
1037  */
1038  strlcpy(*tzn, TZNAME_GLOBAL[tm->tm_isdst], MAXTZLEN + 1);
1039  if (strlen(TZNAME_GLOBAL[tm->tm_isdst]) > MAXTZLEN)
1040  tm->tm_isdst = -1;
1041  }
1042  }
1043  else
1044  tm->tm_isdst = -1;
1045 #else /* not (HAVE_STRUCT_TM_TM_ZONE ||
1046  * HAVE_INT_TIMEZONE) */
1047  if (tzp != NULL)
1048  {
1049  /* default to UTC */
1050  *tzp = 0;
1051  if (tzn != NULL)
1052  *tzn = NULL;
1053  }
1054  else
1055  tm->tm_isdst = -1;
1056 #endif
1057 }
#define SECS_PER_HOUR
Definition: timestamp.h:127
static struct pg_tm tm
Definition: localtime.c:104
#define MAXTZLEN
Definition: miscadmin.h:263
#define PGTYPES_TS_BAD_TIMESTAMP
Definition: pgtypes_error.h:15
#define TIMEZONE_GLOBAL
Definition: port.h:268
#define TZNAME_GLOBAL
Definition: port.h:269
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
int tm_hour
Definition: pgtime.h:38
int tm_mday
Definition: pgtime.h:39
int tm_mon
Definition: pgtime.h:40
int tm_min
Definition: pgtime.h:37
const char * tm_zone
Definition: pgtime.h:46
int tm_sec
Definition: pgtime.h:36
int tm_isdst
Definition: pgtime.h:44
long int tm_gmtoff
Definition: pgtime.h:45
int tm_year
Definition: pgtime.h:41

References MAXTZLEN, PGTYPES_TS_BAD_TIMESTAMP, SECS_PER_HOUR, strlcpy(), TIMEZONE_GLOBAL, tm, pg_tm::tm_gmtoff, pg_tm::tm_hour, pg_tm::tm_isdst, pg_tm::tm_mday, pg_tm::tm_min, pg_tm::tm_mon, pg_tm::tm_sec, pg_tm::tm_year, pg_tm::tm_zone, and TZNAME_GLOBAL.

Referenced by GetCurrentDateTime().

◆ date2j()

int date2j ( int  y,
int  m,
int  d 
)

Definition at line 581 of file dt_common.c.

582 {
583  int julian;
584  int century;
585 
586  if (m > 2)
587  {
588  m += 1;
589  y += 4800;
590  }
591  else
592  {
593  m += 13;
594  y += 4799;
595  }
596 
597  century = y / 100;
598  julian = y * 365 - 32167;
599  julian += y / 4 - century + century / 4;
600  julian += 7834 * m / 256 + d;
601 
602  return julian;
603 } /* date2j() */
int y
Definition: isn.c:71

References y.

Referenced by DecodeDateTime(), DecodeNumber(), and EncodeDateTime().

◆ datebsearch()

static const datetkn* datebsearch ( const char *  key,
const datetkn base,
unsigned int  nel 
)
static

Definition at line 502 of file dt_common.c.

503 {
504  if (nel > 0)
505  {
506  const datetkn *last = base + nel - 1,
507  *position;
508  int result;
509 
510  while (last >= base)
511  {
512  position = base + ((last - base) >> 1);
513  /* precheck the first character for a bit of extra speed */
514  result = (int) key[0] - (int) position->token[0];
515  if (result == 0)
516  {
517  /* use strncmp so that we match truncated tokens */
518  result = strncmp(key, position->token, TOKMAXLEN);
519  if (result == 0)
520  return position;
521  }
522  if (result < 0)
523  last = position - 1;
524  else
525  base = position + 1;
526  }
527  }
528  return NULL;
529 }
#define TOKMAXLEN
Definition: datetime.h:204

References sort-test::key, and TOKMAXLEN.

Referenced by DecodeSpecial(), and DecodeUnits().

◆ DecodeDate()

static int DecodeDate ( char *  str,
int  fmask,
int *  tmask,
struct tm tm,
bool  EuroDates 
)
static

Definition at line 1308 of file dt_common.c.

1309 {
1310  fsec_t fsec;
1311 
1312  int nf = 0;
1313  int i,
1314  len;
1315  bool bc = false;
1316  bool is2digits = false;
1317  int type,
1318  val,
1319  dmask = 0;
1320  char *field[MAXDATEFIELDS];
1321 
1322  /* parse this string... */
1323  while (*str != '\0' && nf < MAXDATEFIELDS)
1324  {
1325  /* skip field separators */
1326  while (!isalnum((unsigned char) *str))
1327  str++;
1328 
1329  field[nf] = str;
1330  if (isdigit((unsigned char) *str))
1331  {
1332  while (isdigit((unsigned char) *str))
1333  str++;
1334  }
1335  else if (isalpha((unsigned char) *str))
1336  {
1337  while (isalpha((unsigned char) *str))
1338  str++;
1339  }
1340 
1341  /* Just get rid of any non-digit, non-alpha characters... */
1342  if (*str != '\0')
1343  *str++ = '\0';
1344  nf++;
1345  }
1346 
1347 #if 0
1348  /* don't allow too many fields */
1349  if (nf > 3)
1350  return -1;
1351 #endif
1352 
1353  *tmask = 0;
1354 
1355  /* look first for text fields, since that will be unambiguous month */
1356  for (i = 0; i < nf; i++)
1357  {
1358  if (isalpha((unsigned char) *field[i]))
1359  {
1360  type = DecodeSpecial(i, field[i], &val);
1361  if (type == IGNORE_DTF)
1362  continue;
1363 
1364  dmask = DTK_M(type);
1365  switch (type)
1366  {
1367  case MONTH:
1368  tm->tm_mon = val;
1369  break;
1370 
1371  case ADBC:
1372  bc = (val == BC);
1373  break;
1374 
1375  default:
1376  return -1;
1377  }
1378  if (fmask & dmask)
1379  return -1;
1380 
1381  fmask |= dmask;
1382  *tmask |= dmask;
1383 
1384  /* mark this field as being completed */
1385  field[i] = NULL;
1386  }
1387  }
1388 
1389  /* now pick up remaining numeric fields */
1390  for (i = 0; i < nf; i++)
1391  {
1392  if (field[i] == NULL)
1393  continue;
1394 
1395  if ((len = strlen(field[i])) <= 0)
1396  return -1;
1397 
1398  if (DecodeNumber(len, field[i], fmask, &dmask, tm, &fsec, &is2digits, EuroDates) != 0)
1399  return -1;
1400 
1401  if (fmask & dmask)
1402  return -1;
1403 
1404  fmask |= dmask;
1405  *tmask |= dmask;
1406  }
1407 
1408  if ((fmask & ~(DTK_M(DOY) | DTK_M(TZ))) != DTK_DATE_M)
1409  return -1;
1410 
1411  /* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
1412  if (bc)
1413  {
1414  if (tm->tm_year > 0)
1415  tm->tm_year = -(tm->tm_year - 1);
1416  else
1417  return -1;
1418  }
1419  else if (is2digits)
1420  {
1421  if (tm->tm_year < 70)
1422  tm->tm_year += 2000;
1423  else if (tm->tm_year < 100)
1424  tm->tm_year += 1900;
1425  }
1426 
1427  return 0;
1428 } /* DecodeDate() */
int32 fsec_t
Definition: timestamp.h:41
static int DecodeNumber(int flen, char *str, int fmask, int *tmask, struct tm *tm, fsec_t *fsec, bool *is2digits, bool EuroDates)
Definition: dt_common.c:1199
static int DecodeSpecial(int field, char *lowtoken, int *val)
Definition: dt_common.c:635
const char * str
#define MAXDATEFIELDS
Definition: datetime.h:202
#define MONTH
Definition: datetime.h:91
#define IGNORE_DTF
Definition: datetime.h:98
#define DTK_M(t)
Definition: datetime.h:187
#define ADBC
Definition: datetime.h:108
#define TZ
Definition: datetime.h:95
#define BC
Definition: datetime.h:76
#define DTK_DATE_M
Definition: datetime.h:191
#define DOY
Definition: datetime.h:105
long val
Definition: informix.c:689
int i
Definition: isn.c:72
const void size_t len
const char * type

References ADBC, BC, DecodeNumber(), DecodeSpecial(), DOY, DTK_DATE_M, DTK_M, i, IGNORE_DTF, len, MAXDATEFIELDS, MONTH, str, tm, pg_tm::tm_mon, pg_tm::tm_year, type, TZ, and val.

Referenced by DecodeDateTime().

◆ DecodeDateTime()

int DecodeDateTime ( char **  field,
int *  ftype,
int  nf,
int *  dtype,
struct tm tm,
fsec_t fsec,
bool  EuroDates 
)

Definition at line 1782 of file dt_common.c.

1784 {
1785  int fmask = 0,
1786  tmask,
1787  type;
1788  int ptype = 0; /* "prefix type" for ISO y2001m02d04 format */
1789  int i;
1790  int val;
1791  int mer = HR24;
1792  bool haveTextMonth = false;
1793  bool is2digits = false;
1794  bool bc = false;
1795  int t = 0;
1796  int *tzp = &t;
1797 
1798  /***
1799  * We'll insist on at least all of the date fields, but initialize the
1800  * remaining fields in case they are not set later...
1801  ***/
1802  *dtype = DTK_DATE;
1803  tm->tm_hour = 0;
1804  tm->tm_min = 0;
1805  tm->tm_sec = 0;
1806  *fsec = 0;
1807  /* don't know daylight savings time status apriori */
1808  tm->tm_isdst = -1;
1809  if (tzp != NULL)
1810  *tzp = 0;
1811 
1812  for (i = 0; i < nf; i++)
1813  {
1814  switch (ftype[i])
1815  {
1816  case DTK_DATE:
1817  /***
1818  * Integral julian day with attached time zone?
1819  * All other forms with JD will be separated into
1820  * distinct fields, so we handle just this case here.
1821  ***/
1822  if (ptype == DTK_JULIAN)
1823  {
1824  char *cp;
1825  int jday;
1826 
1827  if (tzp == NULL)
1828  return -1;
1829 
1830  jday = strtoint(field[i], &cp, 10);
1831  if (*cp != '-')
1832  return -1;
1833 
1834  j2date(jday, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1835  /* Get the time zone from the end of the string */
1836  if (DecodeTimezone(cp, tzp) != 0)
1837  return -1;
1838 
1839  tmask = DTK_DATE_M | DTK_TIME_M | DTK_M(TZ);
1840  ptype = 0;
1841  break;
1842  }
1843  /***
1844  * Already have a date? Then this might be a POSIX time
1845  * zone with an embedded dash (e.g. "PST-3" == "EST") or
1846  * a run-together time with trailing time zone (e.g. hhmmss-zz).
1847  * - thomas 2001-12-25
1848  ***/
1849  else if (((fmask & DTK_DATE_M) == DTK_DATE_M)
1850  || (ptype != 0))
1851  {
1852  /* No time zone accepted? Then quit... */
1853  if (tzp == NULL)
1854  return -1;
1855 
1856  if (isdigit((unsigned char) *field[i]) || ptype != 0)
1857  {
1858  char *cp;
1859 
1860  if (ptype != 0)
1861  {
1862  /* Sanity check; should not fail this test */
1863  if (ptype != DTK_TIME)
1864  return -1;
1865  ptype = 0;
1866  }
1867 
1868  /*
1869  * Starts with a digit but we already have a time
1870  * field? Then we are in trouble with a date and time
1871  * already...
1872  */
1873  if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1874  return -1;
1875 
1876  if ((cp = strchr(field[i], '-')) == NULL)
1877  return -1;
1878 
1879  /* Get the time zone from the end of the string */
1880  if (DecodeTimezone(cp, tzp) != 0)
1881  return -1;
1882  *cp = '\0';
1883 
1884  /*
1885  * Then read the rest of the field as a concatenated
1886  * time
1887  */
1888  if ((ftype[i] = DecodeNumberField(strlen(field[i]), field[i], fmask,
1889  &tmask, tm, fsec, &is2digits)) < 0)
1890  return -1;
1891 
1892  /*
1893  * modify tmask after returning from
1894  * DecodeNumberField()
1895  */
1896  tmask |= DTK_M(TZ);
1897  }
1898  else
1899  {
1900  if (DecodePosixTimezone(field[i], tzp) != 0)
1901  return -1;
1902 
1903  ftype[i] = DTK_TZ;
1904  tmask = DTK_M(TZ);
1905  }
1906  }
1907  else if (DecodeDate(field[i], fmask, &tmask, tm, EuroDates) != 0)
1908  return -1;
1909  break;
1910 
1911  case DTK_TIME:
1912  if (DecodeTime(field[i], &tmask, tm, fsec) != 0)
1913  return -1;
1914 
1915  /*
1916  * Check upper limit on hours; other limits checked in
1917  * DecodeTime()
1918  */
1919  /* test for > 24:00:00 */
1920  if (tm->tm_hour > 24 ||
1921  (tm->tm_hour == 24 && (tm->tm_min > 0 || tm->tm_sec > 0)))
1922  return -1;
1923  break;
1924 
1925  case DTK_TZ:
1926  {
1927  int tz;
1928 
1929  if (tzp == NULL)
1930  return -1;
1931 
1932  if (DecodeTimezone(field[i], &tz) != 0)
1933  return -1;
1934 
1935  /*
1936  * Already have a time zone? Then maybe this is the second
1937  * field of a POSIX time: EST+3 (equivalent to PST)
1938  */
1939  if (i > 0 && (fmask & DTK_M(TZ)) != 0 &&
1940  ftype[i - 1] == DTK_TZ &&
1941  isalpha((unsigned char) *field[i - 1]))
1942  {
1943  *tzp -= tz;
1944  tmask = 0;
1945  }
1946  else
1947  {
1948  *tzp = tz;
1949  tmask = DTK_M(TZ);
1950  }
1951  }
1952  break;
1953 
1954  case DTK_NUMBER:
1955 
1956  /*
1957  * Was this an "ISO date" with embedded field labels? An
1958  * example is "y2001m02d04" - thomas 2001-02-04
1959  */
1960  if (ptype != 0)
1961  {
1962  char *cp;
1963  int value;
1964 
1965  value = strtoint(field[i], &cp, 10);
1966 
1967  /*
1968  * only a few kinds are allowed to have an embedded
1969  * decimal
1970  */
1971  if (*cp == '.')
1972  switch (ptype)
1973  {
1974  case DTK_JULIAN:
1975  case DTK_TIME:
1976  case DTK_SECOND:
1977  break;
1978  default:
1979  return 1;
1980  break;
1981  }
1982  else if (*cp != '\0')
1983  return -1;
1984 
1985  switch (ptype)
1986  {
1987  case DTK_YEAR:
1988  tm->tm_year = value;
1989  tmask = DTK_M(YEAR);
1990  break;
1991 
1992  case DTK_MONTH:
1993 
1994  /*
1995  * already have a month and hour? then assume
1996  * minutes
1997  */
1998  if ((fmask & DTK_M(MONTH)) != 0 &&
1999  (fmask & DTK_M(HOUR)) != 0)
2000  {
2001  tm->tm_min = value;
2002  tmask = DTK_M(MINUTE);
2003  }
2004  else
2005  {
2006  tm->tm_mon = value;
2007  tmask = DTK_M(MONTH);
2008  }
2009  break;
2010 
2011  case DTK_DAY:
2012  tm->tm_mday = value;
2013  tmask = DTK_M(DAY);
2014  break;
2015 
2016  case DTK_HOUR:
2017  tm->tm_hour = value;
2018  tmask = DTK_M(HOUR);
2019  break;
2020 
2021  case DTK_MINUTE:
2022  tm->tm_min = value;
2023  tmask = DTK_M(MINUTE);
2024  break;
2025 
2026  case DTK_SECOND:
2027  tm->tm_sec = value;
2028  tmask = DTK_M(SECOND);
2029  if (*cp == '.')
2030  {
2031  double frac;
2032 
2033  frac = strtod(cp, &cp);
2034  if (*cp != '\0')
2035  return -1;
2036  *fsec = frac * 1000000;
2037  }
2038  break;
2039 
2040  case DTK_TZ:
2041  tmask = DTK_M(TZ);
2042  if (DecodeTimezone(field[i], tzp) != 0)
2043  return -1;
2044  break;
2045 
2046  case DTK_JULIAN:
2047  /***
2048  * previous field was a label for "julian date"?
2049  ***/
2050  tmask = DTK_DATE_M;
2051  j2date(value, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2052  /* fractional Julian Day? */
2053  if (*cp == '.')
2054  {
2055  double time;
2056 
2057  time = strtod(cp, &cp);
2058  if (*cp != '\0')
2059  return -1;
2060 
2061  tmask |= DTK_TIME_M;
2062  dt2time((time * USECS_PER_DAY), &tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
2063  }
2064  break;
2065 
2066  case DTK_TIME:
2067  /* previous field was "t" for ISO time */
2068  if ((ftype[i] = DecodeNumberField(strlen(field[i]), field[i], (fmask | DTK_DATE_M),
2069  &tmask, tm, fsec, &is2digits)) < 0)
2070  return -1;
2071 
2072  if (tmask != DTK_TIME_M)
2073  return -1;
2074  break;
2075 
2076  default:
2077  return -1;
2078  break;
2079  }
2080 
2081  ptype = 0;
2082  *dtype = DTK_DATE;
2083  }
2084  else
2085  {
2086  char *cp;
2087  int flen;
2088 
2089  flen = strlen(field[i]);
2090  cp = strchr(field[i], '.');
2091 
2092  /* Embedded decimal and no date yet? */
2093  if (cp != NULL && !(fmask & DTK_DATE_M))
2094  {
2095  if (DecodeDate(field[i], fmask, &tmask, tm, EuroDates) != 0)
2096  return -1;
2097  }
2098  /* embedded decimal and several digits before? */
2099  else if (cp != NULL && flen - strlen(cp) > 2)
2100  {
2101  /*
2102  * Interpret as a concatenated date or time Set the
2103  * type field to allow decoding other fields later.
2104  * Example: 20011223 or 040506
2105  */
2106  if ((ftype[i] = DecodeNumberField(flen, field[i], fmask,
2107  &tmask, tm, fsec, &is2digits)) < 0)
2108  return -1;
2109  }
2110  else if (flen > 4)
2111  {
2112  if ((ftype[i] = DecodeNumberField(flen, field[i], fmask,
2113  &tmask, tm, fsec, &is2digits)) < 0)
2114  return -1;
2115  }
2116  /* otherwise it is a single date/time field... */
2117  else if (DecodeNumber(flen, field[i], fmask,
2118  &tmask, tm, fsec, &is2digits, EuroDates) != 0)
2119  return -1;
2120  }
2121  break;
2122 
2123  case DTK_STRING:
2124  case DTK_SPECIAL:
2125  type = DecodeSpecial(i, field[i], &val);
2126  if (type == IGNORE_DTF)
2127  continue;
2128 
2129  tmask = DTK_M(type);
2130  switch (type)
2131  {
2132  case RESERV:
2133  switch (val)
2134  {
2135  case DTK_NOW:
2136  tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
2137  *dtype = DTK_DATE;
2139  break;
2140 
2141  case DTK_YESTERDAY:
2142  tmask = DTK_DATE_M;
2143  *dtype = DTK_DATE;
2145  j2date(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - 1,
2146  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2147  tm->tm_hour = 0;
2148  tm->tm_min = 0;
2149  tm->tm_sec = 0;
2150  break;
2151 
2152  case DTK_TODAY:
2153  tmask = DTK_DATE_M;
2154  *dtype = DTK_DATE;
2156  tm->tm_hour = 0;
2157  tm->tm_min = 0;
2158  tm->tm_sec = 0;
2159  break;
2160 
2161  case DTK_TOMORROW:
2162  tmask = DTK_DATE_M;
2163  *dtype = DTK_DATE;
2165  j2date(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) + 1,
2166  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2167  tm->tm_hour = 0;
2168  tm->tm_min = 0;
2169  tm->tm_sec = 0;
2170  break;
2171 
2172  case DTK_ZULU:
2173  tmask = (DTK_TIME_M | DTK_M(TZ));
2174  *dtype = DTK_DATE;
2175  tm->tm_hour = 0;
2176  tm->tm_min = 0;
2177  tm->tm_sec = 0;
2178  if (tzp != NULL)
2179  *tzp = 0;
2180  break;
2181 
2182  default:
2183  *dtype = val;
2184  }
2185 
2186  break;
2187 
2188  case MONTH:
2189 
2190  /*
2191  * already have a (numeric) month? then see if we can
2192  * substitute...
2193  */
2194  if ((fmask & DTK_M(MONTH)) && !haveTextMonth &&
2195  !(fmask & DTK_M(DAY)) && tm->tm_mon >= 1 && tm->tm_mon <= 31)
2196  {
2197  tm->tm_mday = tm->tm_mon;
2198  tmask = DTK_M(DAY);
2199  }
2200  haveTextMonth = true;
2201  tm->tm_mon = val;
2202  break;
2203 
2204  case DTZMOD:
2205 
2206  /*
2207  * daylight savings time modifier (solves "MET DST"
2208  * syntax)
2209  */
2210  tmask |= DTK_M(DTZ);
2211  tm->tm_isdst = 1;
2212  if (tzp == NULL)
2213  return -1;
2214  *tzp -= val;
2215  break;
2216 
2217  case DTZ:
2218 
2219  /*
2220  * set mask for TZ here _or_ check for DTZ later when
2221  * getting default timezone
2222  */
2223  tmask |= DTK_M(TZ);
2224  tm->tm_isdst = 1;
2225  if (tzp == NULL)
2226  return -1;
2227  *tzp = -val;
2228  ftype[i] = DTK_TZ;
2229  break;
2230 
2231  case TZ:
2232  tm->tm_isdst = 0;
2233  if (tzp == NULL)
2234  return -1;
2235  *tzp = -val;
2236  ftype[i] = DTK_TZ;
2237  break;
2238 
2239  case IGNORE_DTF:
2240  break;
2241 
2242  case AMPM:
2243  mer = val;
2244  break;
2245 
2246  case ADBC:
2247  bc = (val == BC);
2248  break;
2249 
2250  case DOW:
2251  tm->tm_wday = val;
2252  break;
2253 
2254  case UNITS:
2255  tmask = 0;
2256  ptype = val;
2257  break;
2258 
2259  case ISOTIME:
2260 
2261  /*
2262  * This is a filler field "t" indicating that the next
2263  * field is time. Try to verify that this is sensible.
2264  */
2265  tmask = 0;
2266 
2267  /* No preceding date? Then quit... */
2268  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2269  return -1;
2270 
2271  /***
2272  * We will need one of the following fields:
2273  * DTK_NUMBER should be hhmmss.fff
2274  * DTK_TIME should be hh:mm:ss.fff
2275  * DTK_DATE should be hhmmss-zz
2276  ***/
2277  if (i >= nf - 1 ||
2278  (ftype[i + 1] != DTK_NUMBER &&
2279  ftype[i + 1] != DTK_TIME &&
2280  ftype[i + 1] != DTK_DATE))
2281  return -1;
2282 
2283  ptype = val;
2284  break;
2285 
2286  default:
2287  return -1;
2288  }
2289  break;
2290 
2291  default:
2292  return -1;
2293  }
2294 
2295  if (tmask & fmask)
2296  return -1;
2297  fmask |= tmask;
2298  }
2299 
2300  /* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
2301  if (bc)
2302  {
2303  if (tm->tm_year > 0)
2304  tm->tm_year = -(tm->tm_year - 1);
2305  else
2306  return -1;
2307  }
2308  else if (is2digits)
2309  {
2310  if (tm->tm_year < 70)
2311  tm->tm_year += 2000;
2312  else if (tm->tm_year < 100)
2313  tm->tm_year += 1900;
2314  }
2315 
2316  if (mer != HR24 && tm->tm_hour > 12)
2317  return -1;
2318  if (mer == AM && tm->tm_hour == 12)
2319  tm->tm_hour = 0;
2320  else if (mer == PM && tm->tm_hour != 12)
2321  tm->tm_hour += 12;
2322 
2323  /* do additional checking for full date specs... */
2324  if (*dtype == DTK_DATE)
2325  {
2326  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2327  return ((fmask & DTK_TIME_M) == DTK_TIME_M) ? 1 : -1;
2328 
2329  /*
2330  * check for valid day of month and month, now that we know for sure
2331  * the month and year...
2332  */
2333  if (tm->tm_mon < 1 || tm->tm_mday < 1 || tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
2334  return -1;
2335 
2336  /*
2337  * backend tried to find local timezone here but we don't use the
2338  * result afterwards anyway so we only check for this error: daylight
2339  * savings time modifier but no standard timezone?
2340  */
2341  if ((fmask & DTK_DATE_M) == DTK_DATE_M && tzp != NULL && !(fmask & DTK_M(TZ)) && (fmask & DTK_M(DTZMOD)))
2342  return -1;
2343  }
2344 
2345  return 0;
2346 } /* DecodeDateTime() */
#define USECS_PER_DAY
Definition: timestamp.h:131
const int day_tab[2][13]
Definition: dt_common.c:14
void GetCurrentDateTime(struct tm *tm)
Definition: dt_common.c:1060
static int DecodeTimezone(char *str, int *tzp)
Definition: dt_common.c:1502
static int DecodePosixTimezone(char *str, int *tzp)
Definition: dt_common.c:1547
int DecodeTime(char *str, int *tmask, struct tm *tm, fsec_t *fsec)
Definition: dt_common.c:1437
int date2j(int y, int m, int d)
Definition: dt_common.c:581
void j2date(int jd, int *year, int *month, int *day)
Definition: dt_common.c:606
static int DecodeNumberField(int len, char *str, int fmask, int *tmask, struct tm *tm, fsec_t *fsec, bool *is2digits)
Definition: dt_common.c:1089
void dt2time(double jd, int *hour, int *min, int *sec, fsec_t *fsec)
Definition: dt_common.c:1068
static int DecodeDate(char *str, int fmask, int *tmask, struct tm *tm, bool EuroDates)
Definition: dt_common.c:1308
#define DTK_TOMORROW
Definition: datetime.h:156
#define DTK_SPECIAL
Definition: datetime.h:149
#define AMPM
Definition: datetime.h:99
#define DTK_TIME
Definition: datetime.h:145
#define DTK_SECOND
Definition: datetime.h:160
#define PM
Definition: datetime.h:72
#define DTK_NUMBER
Definition: datetime.h:141
#define DTK_STRING
Definition: datetime.h:142
#define DTK_JULIAN
Definition: datetime.h:173
#define DTK_TIME_M
Definition: datetime.h:192
#define HOUR
Definition: datetime.h:100
#define DAY
Definition: datetime.h:93
#define YEAR
Definition: datetime.h:92
#define DTK_DATE
Definition: datetime.h:144
#define DTK_DAY
Definition: datetime.h:163
#define RESERV
Definition: datetime.h:90
#define HR24
Definition: datetime.h:73
#define SECOND
Definition: datetime.h:102
#define isleap(y)
Definition: datetime.h:271
#define DTZMOD
Definition: datetime.h:122
#define DTK_TZ
Definition: datetime.h:146
#define DOW
Definition: datetime.h:106
#define ISOTIME
Definition: datetime.h:115
#define DTK_HOUR
Definition: datetime.h:162
#define MINUTE
Definition: datetime.h:101
#define DTZ
Definition: datetime.h:96
#define DTK_YEAR
Definition: datetime.h:167
#define AM
Definition: datetime.h:71
#define DTK_MONTH
Definition: datetime.h:165
#define DTK_YESTERDAY
Definition: datetime.h:154
#define DTK_ZULU
Definition: datetime.h:157
#define DTK_MINUTE
Definition: datetime.h:161
#define UNITS
Definition: datetime.h:107
#define DTK_TODAY
Definition: datetime.h:155
#define DTK_NOW
Definition: datetime.h:153
static struct @160 value
int strtoint(const char *pg_restrict str, char **pg_restrict endptr, int base)
Definition: string.c:50
int tm_wday
Definition: pgtime.h:42

References ADBC, AM, AMPM, BC, date2j(), DAY, day_tab, DecodeDate(), DecodeNumber(), DecodeNumberField(), DecodePosixTimezone(), DecodeSpecial(), DecodeTime(), DecodeTimezone(), DOW, dt2time(), DTK_DATE, DTK_DATE_M, DTK_DAY, DTK_HOUR, DTK_JULIAN, DTK_M, DTK_MINUTE, DTK_MONTH, DTK_NOW, DTK_NUMBER, DTK_SECOND, DTK_SPECIAL, DTK_STRING, DTK_TIME, DTK_TIME_M, DTK_TODAY, DTK_TOMORROW, DTK_TZ, DTK_YEAR, DTK_YESTERDAY, DTK_ZULU, DTZ, DTZMOD, GetCurrentDateTime(), HOUR, HR24, i, IGNORE_DTF, isleap, ISOTIME, j2date(), MINUTE, MONTH, PM, RESERV, SECOND, strtoint(), tm, pg_tm::tm_hour, pg_tm::tm_isdst, pg_tm::tm_mday, pg_tm::tm_min, pg_tm::tm_mon, pg_tm::tm_sec, pg_tm::tm_wday, pg_tm::tm_year, type, TZ, UNITS, USECS_PER_DAY, val, value, and YEAR.

◆ DecodeNumber()

static int DecodeNumber ( int  flen,
char *  str,
int  fmask,
int *  tmask,
struct tm tm,
fsec_t fsec,
bool *  is2digits,
bool  EuroDates 
)
static

Definition at line 1199 of file dt_common.c.

1201 {
1202  int val;
1203  char *cp;
1204 
1205  *tmask = 0;
1206 
1207  val = strtoint(str, &cp, 10);
1208  if (cp == str)
1209  return -1;
1210 
1211  if (*cp == '.')
1212  {
1213  /*
1214  * More than two digits? Then could be a date or a run-together time:
1215  * 2001.360 20011225 040506.789
1216  */
1217  if (cp - str > 2)
1218  return DecodeNumberField(flen, str, (fmask | DTK_DATE_M),
1219  tmask, tm, fsec, is2digits);
1220 
1221  *fsec = strtod(cp, &cp);
1222  if (*cp != '\0')
1223  return -1;
1224  }
1225  else if (*cp != '\0')
1226  return -1;
1227 
1228  /* Special case day of year? */
1229  if (flen == 3 && (fmask & DTK_M(YEAR)) && val >= 1 && val <= 366)
1230  {
1231  *tmask = (DTK_M(DOY) | DTK_M(MONTH) | DTK_M(DAY));
1232  tm->tm_yday = val;
1233  j2date(date2j(tm->tm_year, 1, 1) + tm->tm_yday - 1,
1234  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1235  }
1236 
1237  /***
1238  * Enough digits to be unequivocal year? Used to test for 4 digits or
1239  * more, but we now test first for a three-digit doy so anything
1240  * bigger than two digits had better be an explicit year.
1241  * - thomas 1999-01-09
1242  * Back to requiring a 4 digit year. We accept a two digit
1243  * year farther down. - thomas 2000-03-28
1244  ***/
1245  else if (flen >= 4)
1246  {
1247  *tmask = DTK_M(YEAR);
1248 
1249  /* already have a year? then see if we can substitute... */
1250  if ((fmask & DTK_M(YEAR)) && !(fmask & DTK_M(DAY)) &&
1251  tm->tm_year >= 1 && tm->tm_year <= 31)
1252  {
1253  tm->tm_mday = tm->tm_year;
1254  *tmask = DTK_M(DAY);
1255  }
1256 
1257  tm->tm_year = val;
1258  }
1259 
1260  /* already have year? then could be month */
1261  else if ((fmask & DTK_M(YEAR)) && !(fmask & DTK_M(MONTH)) && val >= 1 && val <= MONTHS_PER_YEAR)
1262  {
1263  *tmask = DTK_M(MONTH);
1264  tm->tm_mon = val;
1265  }
1266  /* no year and EuroDates enabled? then could be day */
1267  else if ((EuroDates || (fmask & DTK_M(MONTH))) &&
1268  !(fmask & DTK_M(YEAR)) && !(fmask & DTK_M(DAY)) &&
1269  val >= 1 && val <= 31)
1270  {
1271  *tmask = DTK_M(DAY);
1272  tm->tm_mday = val;
1273  }
1274  else if (!(fmask & DTK_M(MONTH)) && val >= 1 && val <= MONTHS_PER_YEAR)
1275  {
1276  *tmask = DTK_M(MONTH);
1277  tm->tm_mon = val;
1278  }
1279  else if (!(fmask & DTK_M(DAY)) && val >= 1 && val <= 31)
1280  {
1281  *tmask = DTK_M(DAY);
1282  tm->tm_mday = val;
1283  }
1284 
1285  /*
1286  * Check for 2 or 4 or more digits, but currently we reach here only if
1287  * two digits. - thomas 2000-03-28
1288  */
1289  else if (!(fmask & DTK_M(YEAR)) && (flen >= 4 || flen == 2))
1290  {
1291  *tmask = DTK_M(YEAR);
1292  tm->tm_year = val;
1293 
1294  /* adjust ONLY if exactly two digits... */
1295  *is2digits = (flen == 2);
1296  }
1297  else
1298  return -1;
1299 
1300  return 0;
1301 } /* DecodeNumber() */
#define MONTHS_PER_YEAR
Definition: timestamp.h:108
int tm_yday
Definition: pgtime.h:43

References date2j(), DAY, DecodeNumberField(), DOY, DTK_DATE_M, DTK_M, j2date(), MONTH, MONTHS_PER_YEAR, str, strtoint(), tm, pg_tm::tm_mday, pg_tm::tm_mon, pg_tm::tm_yday, pg_tm::tm_year, val, and YEAR.

Referenced by DecodeDate(), and DecodeDateTime().

◆ DecodeNumberField()

static int DecodeNumberField ( int  len,
char *  str,
int  fmask,
int *  tmask,
struct tm tm,
fsec_t fsec,
bool *  is2digits 
)
static

Definition at line 1089 of file dt_common.c.

1091 {
1092  char *cp;
1093 
1094  /*
1095  * Have a decimal point? Then this is a date or something with a seconds
1096  * field...
1097  */
1098  if ((cp = strchr(str, '.')) != NULL)
1099  {
1100  char fstr[7];
1101  int i;
1102 
1103  cp++;
1104 
1105  /*
1106  * OK, we have at most six digits to care about. Let's construct a
1107  * string with those digits, zero-padded on the right, and then do the
1108  * conversion to an integer.
1109  *
1110  * XXX This truncates the seventh digit, unlike rounding it as the
1111  * backend does.
1112  */
1113  for (i = 0; i < 6; i++)
1114  fstr[i] = *cp != '\0' ? *cp++ : '0';
1115  fstr[i] = '\0';
1116  *fsec = strtoint(fstr, NULL, 10);
1117  *cp = '\0';
1118  len = strlen(str);
1119  }
1120  /* No decimal point and no complete date yet? */
1121  else if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1122  {
1123  /* yyyymmdd? */
1124  if (len == 8)
1125  {
1126  *tmask = DTK_DATE_M;
1127 
1128  tm->tm_mday = atoi(str + 6);
1129  *(str + 6) = '\0';
1130  tm->tm_mon = atoi(str + 4);
1131  *(str + 4) = '\0';
1132  tm->tm_year = atoi(str + 0);
1133 
1134  return DTK_DATE;
1135  }
1136  /* yymmdd? */
1137  else if (len == 6)
1138  {
1139  *tmask = DTK_DATE_M;
1140  tm->tm_mday = atoi(str + 4);
1141  *(str + 4) = '\0';
1142  tm->tm_mon = atoi(str + 2);
1143  *(str + 2) = '\0';
1144  tm->tm_year = atoi(str + 0);
1145  *is2digits = true;
1146 
1147  return DTK_DATE;
1148  }
1149  /* yyddd? */
1150  else if (len == 5)
1151  {
1152  *tmask = DTK_DATE_M;
1153  tm->tm_mday = atoi(str + 2);
1154  *(str + 2) = '\0';
1155  tm->tm_mon = 1;
1156  tm->tm_year = atoi(str + 0);
1157  *is2digits = true;
1158 
1159  return DTK_DATE;
1160  }
1161  }
1162 
1163  /* not all time fields are specified? */
1164  if ((fmask & DTK_TIME_M) != DTK_TIME_M)
1165  {
1166  /* hhmmss */
1167  if (len == 6)
1168  {
1169  *tmask = DTK_TIME_M;
1170  tm->tm_sec = atoi(str + 4);
1171  *(str + 4) = '\0';
1172  tm->tm_min = atoi(str + 2);
1173  *(str + 2) = '\0';
1174  tm->tm_hour = atoi(str + 0);
1175 
1176  return DTK_TIME;
1177  }
1178  /* hhmm? */
1179  else if (len == 4)
1180  {
1181  *tmask = DTK_TIME_M;
1182  tm->tm_sec = 0;
1183  tm->tm_min = atoi(str + 2);
1184  *(str + 2) = '\0';
1185  tm->tm_hour = atoi(str + 0);
1186 
1187  return DTK_TIME;
1188  }
1189  }
1190 
1191  return -1;
1192 } /* DecodeNumberField() */

References DTK_DATE, DTK_DATE_M, DTK_TIME, DTK_TIME_M, i, len, str, strtoint(), tm, pg_tm::tm_hour, pg_tm::tm_mday, pg_tm::tm_min, pg_tm::tm_mon, pg_tm::tm_sec, and pg_tm::tm_year.

Referenced by DecodeDateTime(), and DecodeNumber().

◆ DecodePosixTimezone()

static int DecodePosixTimezone ( char *  str,
int *  tzp 
)
static

Definition at line 1547 of file dt_common.c.

1548 {
1549  int val,
1550  tz;
1551  int type;
1552  char *cp;
1553  char delim;
1554 
1555  cp = str;
1556  while (*cp != '\0' && isalpha((unsigned char) *cp))
1557  cp++;
1558 
1559  if (DecodeTimezone(cp, &tz) != 0)
1560  return -1;
1561 
1562  delim = *cp;
1563  *cp = '\0';
1565  *cp = delim;
1566 
1567  switch (type)
1568  {
1569  case DTZ:
1570  case TZ:
1571  *tzp = -(val + tz);
1572  break;
1573 
1574  default:
1575  return -1;
1576  }
1577 
1578  return 0;
1579 } /* DecodePosixTimezone() */

References DecodeSpecial(), DecodeTimezone(), DTZ, MAXDATEFIELDS, str, type, TZ, and val.

Referenced by DecodeDateTime().

◆ DecodeSpecial()

static int DecodeSpecial ( int  field,
char *  lowtoken,
int *  val 
)
static

Definition at line 635 of file dt_common.c.

636 {
637  int type;
638  const datetkn *tp;
639 
640  /* use strncmp so that we match truncated tokens */
641  if (datecache[field] != NULL &&
642  strncmp(lowtoken, datecache[field]->token, TOKMAXLEN) == 0)
643  tp = datecache[field];
644  else
645  {
646  tp = NULL;
647  if (!tp)
648  tp = datebsearch(lowtoken, datetktbl, szdatetktbl);
649  }
650  datecache[field] = tp;
651  if (tp == NULL)
652  {
654  *val = 0;
655  }
656  else
657  {
658  type = tp->type;
659  *val = tp->value;
660  }
661 
662  return type;
663 } /* DecodeSpecial() */
static const datetkn datetktbl[]
Definition: dt_common.c:20
static const unsigned int szdatetktbl
Definition: dt_common.c:486
static const datetkn * datecache[MAXDATEFIELDS]
Definition: dt_common.c:489
static const datetkn * datebsearch(const char *key, const datetkn *base, unsigned int nel)
Definition: dt_common.c:502
#define UNKNOWN_FIELD
Definition: datetime.h:124
#define token
Definition: indent_globs.h:126
int32 value
Definition: datetime.h:211
char type
Definition: datetime.h:210

References datebsearch(), datecache, datetktbl, szdatetktbl, token, TOKMAXLEN, type, datetkn::type, UNKNOWN_FIELD, val, and datetkn::value.

Referenced by DecodeDate(), DecodeDateTime(), and DecodePosixTimezone().

◆ DecodeTime()

int DecodeTime ( char *  str,
int *  tmask,
struct tm tm,
fsec_t fsec 
)

Definition at line 1437 of file dt_common.c.

1438 {
1439  char *cp;
1440 
1441  *tmask = DTK_TIME_M;
1442 
1443  tm->tm_hour = strtoint(str, &cp, 10);
1444  if (*cp != ':')
1445  return -1;
1446  str = cp + 1;
1447  tm->tm_min = strtoint(str, &cp, 10);
1448  if (*cp == '\0')
1449  {
1450  tm->tm_sec = 0;
1451  *fsec = 0;
1452  }
1453  else if (*cp != ':')
1454  return -1;
1455  else
1456  {
1457  str = cp + 1;
1458  tm->tm_sec = strtoint(str, &cp, 10);
1459  if (*cp == '\0')
1460  *fsec = 0;
1461  else if (*cp == '.')
1462  {
1463  char fstr[7];
1464  int i;
1465 
1466  cp++;
1467 
1468  /*
1469  * OK, we have at most six digits to care about. Let's construct a
1470  * string with those digits, zero-padded on the right, and then do
1471  * the conversion to an integer.
1472  *
1473  * XXX This truncates the seventh digit, unlike rounding it as the
1474  * backend does.
1475  */
1476  for (i = 0; i < 6; i++)
1477  fstr[i] = *cp != '\0' ? *cp++ : '0';
1478  fstr[i] = '\0';
1479  *fsec = strtoint(fstr, &cp, 10);
1480  if (*cp != '\0')
1481  return -1;
1482  }
1483  else
1484  return -1;
1485  }
1486 
1487  /* do a sanity check */
1488  if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_min > 59 ||
1489  tm->tm_sec < 0 || tm->tm_sec > 59 || *fsec >= USECS_PER_SEC)
1490  return -1;
1491 
1492  return 0;
1493 } /* DecodeTime() */
#define USECS_PER_SEC
Definition: timestamp.h:134

References DTK_TIME_M, i, str, strtoint(), tm, pg_tm::tm_hour, pg_tm::tm_min, pg_tm::tm_sec, and USECS_PER_SEC.

Referenced by DecodeDateTime().

◆ DecodeTimezone()

static int DecodeTimezone ( char *  str,
int *  tzp 
)
static

Definition at line 1502 of file dt_common.c.

1503 {
1504  int tz;
1505  int hr,
1506  min;
1507  char *cp;
1508  int len;
1509 
1510  /* assume leading character is "+" or "-" */
1511  hr = strtoint(str + 1, &cp, 10);
1512 
1513  /* explicit delimiter? */
1514  if (*cp == ':')
1515  min = strtoint(cp + 1, &cp, 10);
1516  /* otherwise, might have run things together... */
1517  else if (*cp == '\0' && (len = strlen(str)) > 3)
1518  {
1519  min = strtoint(str + len - 2, &cp, 10);
1520  if (min < 0 || min >= 60)
1521  return -1;
1522 
1523  *(str + len - 2) = '\0';
1524  hr = strtoint(str + 1, &cp, 10);
1525  if (hr < 0 || hr > 13)
1526  return -1;
1527  }
1528  else
1529  min = 0;
1530 
1531  tz = (hr * MINS_PER_HOUR + min) * SECS_PER_MINUTE;
1532  if (*str == '-')
1533  tz = -tz;
1534 
1535  *tzp = -tz;
1536  return *cp != '\0';
1537 } /* DecodeTimezone() */
#define MINS_PER_HOUR
Definition: timestamp.h:129
#define SECS_PER_MINUTE
Definition: timestamp.h:128

References len, MINS_PER_HOUR, SECS_PER_MINUTE, str, and strtoint().

Referenced by DecodeDateTime(), DecodePosixTimezone(), and PGTYPEStimestamp_defmt_scan().

◆ DecodeUnits()

int DecodeUnits ( int  field,
char *  lowtoken,
int *  val 
)

Definition at line 536 of file dt_common.c.

537 {
538  int type;
539  const datetkn *tp;
540 
541  /* use strncmp so that we match truncated tokens */
542  if (deltacache[field] != NULL &&
543  strncmp(lowtoken, deltacache[field]->token, TOKMAXLEN) == 0)
544  tp = deltacache[field];
545  else
546  tp = datebsearch(lowtoken, deltatktbl, szdeltatktbl);
547  deltacache[field] = tp;
548  if (tp == NULL)
549  {
551  *val = 0;
552  }
553  else
554  {
555  type = tp->type;
556  *val = tp->value;
557  }
558 
559  return type;
560 } /* DecodeUnits() */
static const datetkn * deltacache[MAXDATEFIELDS]
Definition: dt_common.c:491
static const unsigned int szdeltatktbl
Definition: dt_common.c:487
static const datetkn deltatktbl[]
Definition: dt_common.c:421

References datebsearch(), deltacache, deltatktbl, szdeltatktbl, token, TOKMAXLEN, type, datetkn::type, UNKNOWN_FIELD, val, and datetkn::value.

◆ dt2time()

void dt2time ( double  jd,
int *  hour,
int *  min,
int *  sec,
fsec_t fsec 
)

Definition at line 1068 of file dt_common.c.

1069 {
1070  int64 time;
1071 
1072  time = jd;
1073  *hour = time / USECS_PER_HOUR;
1074  time -= (*hour) * USECS_PER_HOUR;
1075  *min = time / USECS_PER_MINUTE;
1076  time -= (*min) * USECS_PER_MINUTE;
1077  *sec = time / USECS_PER_SEC;
1078  *fsec = time - (*sec * USECS_PER_SEC);
1079 } /* dt2time() */
#define USECS_PER_HOUR
Definition: timestamp.h:132
#define USECS_PER_MINUTE
Definition: timestamp.h:133

References USECS_PER_HOUR, USECS_PER_MINUTE, and USECS_PER_SEC.

Referenced by DecodeDateTime().

◆ EncodeDateOnly()

void EncodeDateOnly ( struct tm tm,
int  style,
char *  str,
bool  EuroDates 
)

Definition at line 669 of file dt_common.c.

670 {
671  Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
672 
673  switch (style)
674  {
675  case USE_ISO_DATES:
676  /* compatible with ISO date formats */
677  if (tm->tm_year > 0)
678  sprintf(str, "%04d-%02d-%02d",
679  tm->tm_year, tm->tm_mon, tm->tm_mday);
680  else
681  sprintf(str, "%04d-%02d-%02d %s",
682  -(tm->tm_year - 1), tm->tm_mon, tm->tm_mday, "BC");
683  break;
684 
685  case USE_SQL_DATES:
686  /* compatible with Oracle/Ingres date formats */
687  if (EuroDates)
688  sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
689  else
690  sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
691  if (tm->tm_year > 0)
692  sprintf(str + 5, "/%04d", tm->tm_year);
693  else
694  sprintf(str + 5, "/%04d %s", -(tm->tm_year - 1), "BC");
695  break;
696 
697  case USE_GERMAN_DATES:
698  /* German-style date format */
699  sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
700  if (tm->tm_year > 0)
701  sprintf(str + 5, ".%04d", tm->tm_year);
702  else
703  sprintf(str + 5, ".%04d %s", -(tm->tm_year - 1), "BC");
704  break;
705 
706  case USE_POSTGRES_DATES:
707  default:
708  /* traditional date-only style for Postgres */
709  if (EuroDates)
710  sprintf(str, "%02d-%02d", tm->tm_mday, tm->tm_mon);
711  else
712  sprintf(str, "%02d-%02d", tm->tm_mon, tm->tm_mday);
713  if (tm->tm_year > 0)
714  sprintf(str + 5, "-%04d", tm->tm_year);
715  else
716  sprintf(str + 5, "-%04d %s", -(tm->tm_year - 1), "BC");
717  break;
718  }
719 }
#define Assert(condition)
Definition: c.h:837
#define USE_SQL_DATES
Definition: miscadmin.h:237
#define USE_POSTGRES_DATES
Definition: miscadmin.h:235
#define USE_ISO_DATES
Definition: miscadmin.h:236
#define USE_GERMAN_DATES
Definition: miscadmin.h:238
#define sprintf
Definition: port.h:240

References Assert, MONTHS_PER_YEAR, sprintf, str, tm, pg_tm::tm_mday, pg_tm::tm_mon, pg_tm::tm_year, USE_GERMAN_DATES, USE_ISO_DATES, USE_POSTGRES_DATES, and USE_SQL_DATES.

◆ EncodeDateTime()

void EncodeDateTime ( struct tm tm,
fsec_t  fsec,
bool  print_tz,
int  tz,
const char *  tzn,
int  style,
char *  str,
bool  EuroDates 
)

Definition at line 753 of file dt_common.c.

754 {
755  int day,
756  hour,
757  min;
758 
759  /*
760  * Negative tm_isdst means we have no valid time zone translation.
761  */
762  if (tm->tm_isdst < 0)
763  print_tz = false;
764 
765  switch (style)
766  {
767  case USE_ISO_DATES:
768  /* Compatible with ISO-8601 date formats */
769 
770  sprintf(str, "%04d-%02d-%02d %02d:%02d",
771  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
772  tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min);
773 
774  /*
775  * Print fractional seconds if any. The field widths here should
776  * be at least equal to MAX_TIMESTAMP_PRECISION.
777  */
778  if (fsec != 0)
779  {
780  sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
782  }
783  else
784  sprintf(str + strlen(str), ":%02d", tm->tm_sec);
785 
786  if (tm->tm_year <= 0)
787  sprintf(str + strlen(str), " BC");
788 
789  if (print_tz)
790  {
791  hour = -(tz / SECS_PER_HOUR);
792  min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
793  if (min != 0)
794  sprintf(str + strlen(str), "%+03d:%02d", hour, min);
795  else
796  sprintf(str + strlen(str), "%+03d", hour);
797  }
798  break;
799 
800  case USE_SQL_DATES:
801  /* Compatible with Oracle/Ingres date formats */
802 
803  if (EuroDates)
804  sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
805  else
806  sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
807 
808  sprintf(str + 5, "/%04d %02d:%02d",
809  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
810  tm->tm_hour, tm->tm_min);
811 
812  /*
813  * Print fractional seconds if any. The field widths here should
814  * be at least equal to MAX_TIMESTAMP_PRECISION.
815  */
816  if (fsec != 0)
817  {
818  sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
820  }
821  else
822  sprintf(str + strlen(str), ":%02d", tm->tm_sec);
823 
824  if (tm->tm_year <= 0)
825  sprintf(str + strlen(str), " BC");
826 
827  /*
828  * Note: the uses of %.*s in this function would be risky if the
829  * timezone names ever contain non-ASCII characters, since we are
830  * not being careful to do encoding-aware clipping. However, all
831  * TZ abbreviations in the IANA database are plain ASCII.
832  */
833 
834  if (print_tz)
835  {
836  if (tzn)
837  sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
838  else
839  {
840  hour = -(tz / SECS_PER_HOUR);
841  min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
842  if (min != 0)
843  sprintf(str + strlen(str), "%+03d:%02d", hour, min);
844  else
845  sprintf(str + strlen(str), "%+03d", hour);
846  }
847  }
848  break;
849 
850  case USE_GERMAN_DATES:
851  /* German variant on European style */
852 
853  sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
854 
855  sprintf(str + 5, ".%04d %02d:%02d",
856  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
857  tm->tm_hour, tm->tm_min);
858 
859  /*
860  * Print fractional seconds if any. The field widths here should
861  * be at least equal to MAX_TIMESTAMP_PRECISION.
862  */
863  if (fsec != 0)
864  {
865  sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
867  }
868  else
869  sprintf(str + strlen(str), ":%02d", tm->tm_sec);
870 
871  if (tm->tm_year <= 0)
872  sprintf(str + strlen(str), " BC");
873 
874  if (print_tz)
875  {
876  if (tzn)
877  sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
878  else
879  {
880  hour = -(tz / SECS_PER_HOUR);
881  min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
882  if (min != 0)
883  sprintf(str + strlen(str), "%+03d:%02d", hour, min);
884  else
885  sprintf(str + strlen(str), "%+03d", hour);
886  }
887  }
888  break;
889 
890  case USE_POSTGRES_DATES:
891  default:
892  /* Backward-compatible with traditional Postgres abstime dates */
893 
894  day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
895  tm->tm_wday = (int) ((day + date2j(2000, 1, 1) + 1) % 7);
896 
897  memcpy(str, days[tm->tm_wday], 3);
898  strcpy(str + 3, " ");
899 
900  if (EuroDates)
901  sprintf(str + 4, "%02d %3s", tm->tm_mday, months[tm->tm_mon - 1]);
902  else
903  sprintf(str + 4, "%3s %02d", months[tm->tm_mon - 1], tm->tm_mday);
904 
905  sprintf(str + 10, " %02d:%02d", tm->tm_hour, tm->tm_min);
906 
907  /*
908  * Print fractional seconds if any. The field widths here should
909  * be at least equal to MAX_TIMESTAMP_PRECISION.
910  */
911  if (fsec != 0)
912  {
913  sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
915  }
916  else
917  sprintf(str + strlen(str), ":%02d", tm->tm_sec);
918 
919  sprintf(str + strlen(str), " %04d",
920  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1));
921  if (tm->tm_year <= 0)
922  sprintf(str + strlen(str), " BC");
923 
924  if (print_tz)
925  {
926  if (tzn)
927  sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
928  else
929  {
930  /*
931  * We have a time zone, but no string version. Use the
932  * numeric form, but be sure to include a leading space to
933  * avoid formatting something which would be rejected by
934  * the date/time parser later. - thomas 2001-10-19
935  */
936  hour = -(tz / SECS_PER_HOUR);
937  min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
938  if (min != 0)
939  sprintf(str + strlen(str), " %+03d:%02d", hour, min);
940  else
941  sprintf(str + strlen(str), " %+03d", hour);
942  }
943  }
944  break;
945  }
946 }
char * days[]
Definition: dt_common.c:495
void TrimTrailingZeros(char *str)
Definition: dt_common.c:722
char * months[]
Definition: dt_common.c:493

References date2j(), days, MAXTZLEN, MINS_PER_HOUR, months, SECS_PER_HOUR, sprintf, str, tm, pg_tm::tm_hour, pg_tm::tm_isdst, pg_tm::tm_mday, pg_tm::tm_min, pg_tm::tm_mon, pg_tm::tm_sec, pg_tm::tm_wday, pg_tm::tm_year, TrimTrailingZeros(), USE_GERMAN_DATES, USE_ISO_DATES, USE_POSTGRES_DATES, and USE_SQL_DATES.

◆ find_end_token()

static char* find_end_token ( char *  str,
char *  fmt 
)
static

Definition at line 2354 of file dt_common.c.

2355 {
2356  /*
2357  * str: here is28the day12the hour fmt: here is%dthe day%hthe hour
2358  *
2359  * we extract the 28, we read the percent sign and the type "d" then this
2360  * functions gets called as find_end_token("28the day12the hour", "the
2361  * day%hthehour")
2362  *
2363  * fmt points to "the day%hthehour", next_percent points to %hthehour and
2364  * we have to find a match for everything between these positions ("the
2365  * day"). We look for "the day" in str and know that the pattern we are
2366  * about to scan ends where this string starts (right after the "28")
2367  *
2368  * At the end, *fmt is '\0' and *str isn't. end_position then is
2369  * unchanged.
2370  */
2371  char *end_position = NULL;
2372  char *next_percent,
2373  *subst_location = NULL;
2374  int scan_offset = 0;
2375  char last_char;
2376 
2377  /* are we at the end? */
2378  if (!*fmt)
2379  {
2380  end_position = fmt;
2381  return end_position;
2382  }
2383 
2384  /* not at the end */
2385  while (fmt[scan_offset] == '%' && fmt[scan_offset + 1])
2386  {
2387  /*
2388  * there is no delimiter, skip to the next delimiter if we're reading
2389  * a number and then something that is not a number "9:15pm", we might
2390  * be able to recover with the strtol end pointer. Go for the next
2391  * percent sign
2392  */
2393  scan_offset += 2;
2394  }
2395  next_percent = strchr(fmt + scan_offset, '%');
2396  if (next_percent)
2397  {
2398  /*
2399  * we don't want to allocate extra memory, so we temporarily set the
2400  * '%' sign to '\0' and call strstr However since we allow whitespace
2401  * to float around everything, we have to shorten the pattern until we
2402  * reach a non-whitespace character
2403  */
2404 
2405  subst_location = next_percent;
2406  while (*(subst_location - 1) == ' ' && subst_location - 1 > fmt + scan_offset)
2407  subst_location--;
2408  last_char = *subst_location;
2409  *subst_location = '\0';
2410 
2411  /*
2412  * the haystack is the str and the needle is the original fmt but it
2413  * ends at the position where the next percent sign would be
2414  */
2415 
2416  /*
2417  * There is one special case. Imagine: str = " 2", fmt = "%d %...",
2418  * since we want to allow blanks as "dynamic" padding we have to
2419  * accept this. Now, we are called with a fmt of " %..." and look for
2420  * " " in str. We find it at the first position and never read the
2421  * 2...
2422  */
2423  while (*str == ' ')
2424  str++;
2425  end_position = strstr(str, fmt + scan_offset);
2426  *subst_location = last_char;
2427  }
2428  else
2429  {
2430  /*
2431  * there is no other percent sign. So everything up to the end has to
2432  * match.
2433  */
2434  end_position = str + strlen(str);
2435  }
2436  if (!end_position)
2437  {
2438  /*
2439  * maybe we have the following case:
2440  *
2441  * str = "4:15am" fmt = "%M:%S %p"
2442  *
2443  * at this place we could have
2444  *
2445  * str = "15am" fmt = " %p"
2446  *
2447  * and have set fmt to " " because overwrote the % sign with a NULL
2448  *
2449  * In this case where we would have to match a space but can't find
2450  * it, set end_position to the end of the string
2451  */
2452  if ((fmt + scan_offset)[0] == ' ' && fmt + scan_offset + 1 == subst_location)
2453  end_position = str + strlen(str);
2454  }
2455  return end_position;
2456 }
static void const char * fmt

References fmt, and str.

Referenced by pgtypes_defmt_scan().

◆ GetCurrentDateTime()

void GetCurrentDateTime ( struct tm tm)

Definition at line 1060 of file dt_common.c.

1061 {
1062  int tz;
1063 
1064  abstime2tm(time(NULL), &tz, tm, NULL);
1065 }
static void abstime2tm(AbsoluteTime _time, int *tzp, struct tm *tm, char **tzn)
Definition: dt_common.c:973

References abstime2tm(), and tm.

Referenced by DecodeDateTime().

◆ GetEpochTime()

int GetEpochTime ( struct tm tm)

Definition at line 949 of file dt_common.c.

950 {
951  struct tm *t0;
952  struct tm tmbuf;
953  time_t epoch = 0;
954 
955  t0 = gmtime_r(&epoch, &tmbuf);
956 
957  if (t0)
958  {
959  tm->tm_year = t0->tm_year + 1900;
960  tm->tm_mon = t0->tm_mon + 1;
961  tm->tm_mday = t0->tm_mday;
962  tm->tm_hour = t0->tm_hour;
963  tm->tm_min = t0->tm_min;
964  tm->tm_sec = t0->tm_sec;
965 
966  return 0;
967  }
968 
969  return -1;
970 } /* GetEpochTime() */
static const unsigned __int64 epoch

References epoch, tm, pg_tm::tm_hour, pg_tm::tm_mday, pg_tm::tm_min, pg_tm::tm_mon, pg_tm::tm_sec, and pg_tm::tm_year.

◆ j2date()

void j2date ( int  jd,
int *  year,
int *  month,
int *  day 
)

Definition at line 606 of file dt_common.c.

607 {
608  unsigned int julian;
609  unsigned int quad;
610  unsigned int extra;
611  int y;
612 
613  julian = jd;
614  julian += 32044;
615  quad = julian / 146097;
616  extra = (julian - quad * 146097) * 4 + 3;
617  julian += 60 + quad * 3 + extra / 146097;
618  quad = julian / 1461;
619  julian -= quad * 1461;
620  y = julian * 4 / 1461;
621  julian = ((y != 0) ? (julian + 305) % 365 : (julian + 306) % 366) + 123;
622  y += quad * 4;
623  *year = y - 4800;
624  quad = julian * 2141 / 65536;
625  *day = julian - 7834 * quad / 256;
626  *month = (quad + 10) % 12 + 1;
627 } /* j2date() */

References y.

Referenced by DecodeDateTime(), and DecodeNumber().

◆ ParseDateTime()

int ParseDateTime ( char *  timestr,
char *  lowstr,
char **  field,
int *  ftype,
int *  numfields,
char **  endstr 
)

Definition at line 1600 of file dt_common.c.

1602 {
1603  int nf = 0;
1604  char *lp = lowstr;
1605 
1606  *endstr = timestr;
1607  /* outer loop through fields */
1608  while (*(*endstr) != '\0')
1609  {
1610  /* Record start of current field */
1611  if (nf >= MAXDATEFIELDS)
1612  return -1;
1613  field[nf] = lp;
1614 
1615  /* leading digit? then date or time */
1616  if (isdigit((unsigned char) *(*endstr)))
1617  {
1618  *lp++ = *(*endstr)++;
1619  while (isdigit((unsigned char) *(*endstr)))
1620  *lp++ = *(*endstr)++;
1621 
1622  /* time field? */
1623  if (*(*endstr) == ':')
1624  {
1625  ftype[nf] = DTK_TIME;
1626  *lp++ = *(*endstr)++;
1627  while (isdigit((unsigned char) *(*endstr)) ||
1628  (*(*endstr) == ':') || (*(*endstr) == '.'))
1629  *lp++ = *(*endstr)++;
1630  }
1631  /* date field? allow embedded text month */
1632  else if (*(*endstr) == '-' || *(*endstr) == '/' || *(*endstr) == '.')
1633  {
1634  /* save delimiting character to use later */
1635  char *dp = (*endstr);
1636 
1637  *lp++ = *(*endstr)++;
1638  /* second field is all digits? then no embedded text month */
1639  if (isdigit((unsigned char) *(*endstr)))
1640  {
1641  ftype[nf] = (*dp == '.') ? DTK_NUMBER : DTK_DATE;
1642  while (isdigit((unsigned char) *(*endstr)))
1643  *lp++ = *(*endstr)++;
1644 
1645  /*
1646  * insist that the delimiters match to get a three-field
1647  * date.
1648  */
1649  if (*(*endstr) == *dp)
1650  {
1651  ftype[nf] = DTK_DATE;
1652  *lp++ = *(*endstr)++;
1653  while (isdigit((unsigned char) *(*endstr)) || (*(*endstr) == *dp))
1654  *lp++ = *(*endstr)++;
1655  }
1656  }
1657  else
1658  {
1659  ftype[nf] = DTK_DATE;
1660  while (isalnum((unsigned char) *(*endstr)) || (*(*endstr) == *dp))
1661  *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1662  }
1663  }
1664 
1665  /*
1666  * otherwise, number only and will determine year, month, day, or
1667  * concatenated fields later...
1668  */
1669  else
1670  ftype[nf] = DTK_NUMBER;
1671  }
1672  /* Leading decimal point? Then fractional seconds... */
1673  else if (*(*endstr) == '.')
1674  {
1675  *lp++ = *(*endstr)++;
1676  while (isdigit((unsigned char) *(*endstr)))
1677  *lp++ = *(*endstr)++;
1678 
1679  ftype[nf] = DTK_NUMBER;
1680  }
1681 
1682  /*
1683  * text? then date string, month, day of week, special, or timezone
1684  */
1685  else if (isalpha((unsigned char) *(*endstr)))
1686  {
1687  ftype[nf] = DTK_STRING;
1688  *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1689  while (isalpha((unsigned char) *(*endstr)))
1690  *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1691 
1692  /*
1693  * Full date string with leading text month? Could also be a POSIX
1694  * time zone...
1695  */
1696  if (*(*endstr) == '-' || *(*endstr) == '/' || *(*endstr) == '.')
1697  {
1698  char *dp = (*endstr);
1699 
1700  ftype[nf] = DTK_DATE;
1701  *lp++ = *(*endstr)++;
1702  while (isdigit((unsigned char) *(*endstr)) || *(*endstr) == *dp)
1703  *lp++ = *(*endstr)++;
1704  }
1705  }
1706  /* skip leading spaces */
1707  else if (isspace((unsigned char) *(*endstr)))
1708  {
1709  (*endstr)++;
1710  continue;
1711  }
1712  /* sign? then special or numeric timezone */
1713  else if (*(*endstr) == '+' || *(*endstr) == '-')
1714  {
1715  *lp++ = *(*endstr)++;
1716  /* soak up leading whitespace */
1717  while (isspace((unsigned char) *(*endstr)))
1718  (*endstr)++;
1719  /* numeric timezone? */
1720  if (isdigit((unsigned char) *(*endstr)))
1721  {
1722  ftype[nf] = DTK_TZ;
1723  *lp++ = *(*endstr)++;
1724  while (isdigit((unsigned char) *(*endstr)) ||
1725  (*(*endstr) == ':') || (*(*endstr) == '.'))
1726  *lp++ = *(*endstr)++;
1727  }
1728  /* special? */
1729  else if (isalpha((unsigned char) *(*endstr)))
1730  {
1731  ftype[nf] = DTK_SPECIAL;
1732  *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1733  while (isalpha((unsigned char) *(*endstr)))
1734  *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1735  }
1736  /* otherwise something wrong... */
1737  else
1738  return -1;
1739  }
1740  /* ignore punctuation but use as delimiter */
1741  else if (ispunct((unsigned char) *(*endstr)))
1742  {
1743  (*endstr)++;
1744  continue;
1745  }
1746  /* otherwise, something is not right... */
1747  else
1748  return -1;
1749 
1750  /* force in a delimiter after each field */
1751  *lp++ = '\0';
1752  nf++;
1753  }
1754 
1755  *numfields = nf;
1756 
1757  return 0;
1758 } /* ParseDateTime() */
unsigned char pg_tolower(unsigned char ch)
Definition: pgstrcasecmp.c:122

References DTK_DATE, DTK_NUMBER, DTK_SPECIAL, DTK_STRING, DTK_TIME, DTK_TZ, MAXDATEFIELDS, and pg_tolower().

◆ pgtypes_defmt_scan()

static int pgtypes_defmt_scan ( union un_fmt_comb scan_val,
int  scan_type,
char **  pstr,
char *  pfmt 
)
static

Definition at line 2459 of file dt_common.c.

2460 {
2461  /*
2462  * scan everything between pstr and pstr_end. This is not including the
2463  * last character so we might set it to '\0' for the parsing
2464  */
2465 
2466  char last_char;
2467  int err = 0;
2468  char *pstr_end;
2469  char *strtol_end = NULL;
2470 
2471  while (**pstr == ' ')
2472  pstr++;
2473  pstr_end = find_end_token(*pstr, pfmt);
2474  if (!pstr_end)
2475  {
2476  /* there was an error, no match */
2477  return 1;
2478  }
2479  last_char = *pstr_end;
2480  *pstr_end = '\0';
2481 
2482  switch (scan_type)
2483  {
2484  case PGTYPES_TYPE_UINT:
2485 
2486  /*
2487  * numbers may be blank-padded, this is the only deviation from
2488  * the fmt-string we accept
2489  */
2490  while (**pstr == ' ')
2491  (*pstr)++;
2492  errno = 0;
2493  scan_val->uint_val = (unsigned int) strtol(*pstr, &strtol_end, 10);
2494  if (errno)
2495  err = 1;
2496  break;
2498  while (**pstr == ' ')
2499  (*pstr)++;
2500  errno = 0;
2501  scan_val->luint_val = (unsigned long int) strtol(*pstr, &strtol_end, 10);
2502  if (errno)
2503  err = 1;
2504  break;
2506  scan_val->str_val = pgtypes_strdup(*pstr);
2507  if (scan_val->str_val == NULL)
2508  err = 1;
2509  break;
2510  }
2511  if (strtol_end && *strtol_end)
2512  *pstr = strtol_end;
2513  else
2514  *pstr = pstr_end;
2515  *pstr_end = last_char;
2516  return err;
2517 }
static char * find_end_token(char *str, char *fmt)
Definition: dt_common.c:2354
void err(int eval, const char *fmt,...)
Definition: err.c:43
char * pgtypes_strdup(const char *str)
Definition: common.c:20
#define PGTYPES_TYPE_UINT
#define PGTYPES_TYPE_STRING_MALLOCED
#define PGTYPES_TYPE_UINT_LONG
unsigned int uint_val
unsigned long int luint_val

References err(), find_end_token(), un_fmt_comb::luint_val, pgtypes_strdup(), PGTYPES_TYPE_STRING_MALLOCED, PGTYPES_TYPE_UINT, PGTYPES_TYPE_UINT_LONG, un_fmt_comb::str_val, and un_fmt_comb::uint_val.

Referenced by PGTYPEStimestamp_defmt_scan().

◆ PGTYPEStimestamp_defmt_scan()

int PGTYPEStimestamp_defmt_scan ( char **  str,
char *  fmt,
timestamp d,
int *  year,
int *  month,
int *  day,
int *  hour,
int *  minute,
int *  second,
int *  tz 
)

Definition at line 2521 of file dt_common.c.

2525 {
2526  union un_fmt_comb scan_val;
2527  int scan_type;
2528 
2529  char *pstr,
2530  *pfmt,
2531  *tmp;
2532  int err = 1;
2533  unsigned int j;
2534  struct tm tm;
2535 
2536  pfmt = fmt;
2537  pstr = *str;
2538 
2539  while (*pfmt)
2540  {
2541  err = 0;
2542  while (*pfmt == ' ')
2543  pfmt++;
2544  while (*pstr == ' ')
2545  pstr++;
2546  if (*pfmt != '%')
2547  {
2548  if (*pfmt == *pstr)
2549  {
2550  pfmt++;
2551  pstr++;
2552  }
2553  else
2554  {
2555  /* Error: no match */
2556  err = 1;
2557  return err;
2558  }
2559  continue;
2560  }
2561  /* here *pfmt equals '%' */
2562  pfmt++;
2563  switch (*pfmt)
2564  {
2565  case 'a':
2566  pfmt++;
2567 
2568  /*
2569  * we parse the day and see if it is a week day but we do not
2570  * check if the week day really matches the date
2571  */
2572  err = 1;
2573  j = 0;
2575  {
2576  if (strncmp(pgtypes_date_weekdays_short[j], pstr,
2577  strlen(pgtypes_date_weekdays_short[j])) == 0)
2578  {
2579  /* found it */
2580  err = 0;
2581  pstr += strlen(pgtypes_date_weekdays_short[j]);
2582  break;
2583  }
2584  j++;
2585  }
2586  break;
2587  case 'A':
2588  /* see note above */
2589  pfmt++;
2590  err = 1;
2591  j = 0;
2592  while (days[j])
2593  {
2594  if (strncmp(days[j], pstr, strlen(days[j])) == 0)
2595  {
2596  /* found it */
2597  err = 0;
2598  pstr += strlen(days[j]);
2599  break;
2600  }
2601  j++;
2602  }
2603  break;
2604  case 'b':
2605  case 'h':
2606  pfmt++;
2607  err = 1;
2608  j = 0;
2609  while (months[j])
2610  {
2611  if (strncmp(months[j], pstr, strlen(months[j])) == 0)
2612  {
2613  /* found it */
2614  err = 0;
2615  pstr += strlen(months[j]);
2616  *month = j + 1;
2617  break;
2618  }
2619  j++;
2620  }
2621  break;
2622  case 'B':
2623  /* see note above */
2624  pfmt++;
2625  err = 1;
2626  j = 0;
2627  while (pgtypes_date_months[j])
2628  {
2629  if (strncmp(pgtypes_date_months[j], pstr, strlen(pgtypes_date_months[j])) == 0)
2630  {
2631  /* found it */
2632  err = 0;
2633  pstr += strlen(pgtypes_date_months[j]);
2634  *month = j + 1;
2635  break;
2636  }
2637  j++;
2638  }
2639  break;
2640  case 'c':
2641  /* XXX */
2642  break;
2643  case 'C':
2644  pfmt++;
2645  scan_type = PGTYPES_TYPE_UINT;
2646  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2647  *year = scan_val.uint_val * 100;
2648  break;
2649  case 'd':
2650  case 'e':
2651  pfmt++;
2652  scan_type = PGTYPES_TYPE_UINT;
2653  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2654  *day = scan_val.uint_val;
2655  break;
2656  case 'D':
2657 
2658  /*
2659  * we have to concatenate the strings in order to be able to
2660  * find the end of the substitution
2661  */
2662  pfmt++;
2663  tmp = pgtypes_alloc(strlen("%m/%d/%y") + strlen(pstr) + 1);
2664  if (!tmp)
2665  return 1;
2666  strcpy(tmp, "%m/%d/%y");
2667  strcat(tmp, pfmt);
2668  err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2669  free(tmp);
2670  return err;
2671  case 'm':
2672  pfmt++;
2673  scan_type = PGTYPES_TYPE_UINT;
2674  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2675  *month = scan_val.uint_val;
2676  break;
2677  case 'y':
2678  case 'g': /* XXX difference to y (ISO) */
2679  pfmt++;
2680  scan_type = PGTYPES_TYPE_UINT;
2681  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2682  if (*year < 0)
2683  {
2684  /* not yet set */
2685  *year = scan_val.uint_val;
2686  }
2687  else
2688  *year += scan_val.uint_val;
2689  if (*year < 100)
2690  *year += 1900;
2691  break;
2692  case 'G':
2693  /* XXX difference to %V (ISO) */
2694  pfmt++;
2695  scan_type = PGTYPES_TYPE_UINT;
2696  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2697  *year = scan_val.uint_val;
2698  break;
2699  case 'H':
2700  case 'I':
2701  case 'k':
2702  case 'l':
2703  pfmt++;
2704  scan_type = PGTYPES_TYPE_UINT;
2705  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2706  *hour += scan_val.uint_val;
2707  break;
2708  case 'j':
2709  pfmt++;
2710  scan_type = PGTYPES_TYPE_UINT;
2711  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2712 
2713  /*
2714  * XXX what should we do with that? We could say that it's
2715  * sufficient if we have the year and the day within the year
2716  * to get at least a specific day.
2717  */
2718  break;
2719  case 'M':
2720  pfmt++;
2721  scan_type = PGTYPES_TYPE_UINT;
2722  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2723  *minute = scan_val.uint_val;
2724  break;
2725  case 'n':
2726  pfmt++;
2727  if (*pstr == '\n')
2728  pstr++;
2729  else
2730  err = 1;
2731  break;
2732  case 'p':
2733  err = 1;
2734  pfmt++;
2735  if (strncmp(pstr, "am", 2) == 0)
2736  {
2737  *hour += 0;
2738  err = 0;
2739  pstr += 2;
2740  }
2741  if (strncmp(pstr, "a.m.", 4) == 0)
2742  {
2743  *hour += 0;
2744  err = 0;
2745  pstr += 4;
2746  }
2747  if (strncmp(pstr, "pm", 2) == 0)
2748  {
2749  *hour += 12;
2750  err = 0;
2751  pstr += 2;
2752  }
2753  if (strncmp(pstr, "p.m.", 4) == 0)
2754  {
2755  *hour += 12;
2756  err = 0;
2757  pstr += 4;
2758  }
2759  break;
2760  case 'P':
2761  err = 1;
2762  pfmt++;
2763  if (strncmp(pstr, "AM", 2) == 0)
2764  {
2765  *hour += 0;
2766  err = 0;
2767  pstr += 2;
2768  }
2769  if (strncmp(pstr, "A.M.", 4) == 0)
2770  {
2771  *hour += 0;
2772  err = 0;
2773  pstr += 4;
2774  }
2775  if (strncmp(pstr, "PM", 2) == 0)
2776  {
2777  *hour += 12;
2778  err = 0;
2779  pstr += 2;
2780  }
2781  if (strncmp(pstr, "P.M.", 4) == 0)
2782  {
2783  *hour += 12;
2784  err = 0;
2785  pstr += 4;
2786  }
2787  break;
2788  case 'r':
2789  pfmt++;
2790  tmp = pgtypes_alloc(strlen("%I:%M:%S %p") + strlen(pstr) + 1);
2791  if (!tmp)
2792  return 1;
2793  strcpy(tmp, "%I:%M:%S %p");
2794  strcat(tmp, pfmt);
2795  err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2796  free(tmp);
2797  return err;
2798  case 'R':
2799  pfmt++;
2800  tmp = pgtypes_alloc(strlen("%H:%M") + strlen(pstr) + 1);
2801  if (!tmp)
2802  return 1;
2803  strcpy(tmp, "%H:%M");
2804  strcat(tmp, pfmt);
2805  err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2806  free(tmp);
2807  return err;
2808  case 's':
2809  pfmt++;
2810  scan_type = PGTYPES_TYPE_UINT_LONG;
2811  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2812  /* number of seconds in scan_val.luint_val */
2813  {
2814  struct tm *tms;
2815  struct tm tmbuf;
2816  time_t et = (time_t) scan_val.luint_val;
2817 
2818  tms = gmtime_r(&et, &tmbuf);
2819 
2820  if (tms)
2821  {
2822  *year = tms->tm_year + 1900;
2823  *month = tms->tm_mon + 1;
2824  *day = tms->tm_mday;
2825  *hour = tms->tm_hour;
2826  *minute = tms->tm_min;
2827  *second = tms->tm_sec;
2828  }
2829  else
2830  err = 1;
2831  }
2832  break;
2833  case 'S':
2834  pfmt++;
2835  scan_type = PGTYPES_TYPE_UINT;
2836  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2837  *second = scan_val.uint_val;
2838  break;
2839  case 't':
2840  pfmt++;
2841  if (*pstr == '\t')
2842  pstr++;
2843  else
2844  err = 1;
2845  break;
2846  case 'T':
2847  pfmt++;
2848  tmp = pgtypes_alloc(strlen("%H:%M:%S") + strlen(pstr) + 1);
2849  if (!tmp)
2850  return 1;
2851  strcpy(tmp, "%H:%M:%S");
2852  strcat(tmp, pfmt);
2853  err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2854  free(tmp);
2855  return err;
2856  case 'u':
2857  pfmt++;
2858  scan_type = PGTYPES_TYPE_UINT;
2859  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2860  if (scan_val.uint_val < 1 || scan_val.uint_val > 7)
2861  err = 1;
2862  break;
2863  case 'U':
2864  pfmt++;
2865  scan_type = PGTYPES_TYPE_UINT;
2866  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2867  if (scan_val.uint_val > 53)
2868  err = 1;
2869  break;
2870  case 'V':
2871  pfmt++;
2872  scan_type = PGTYPES_TYPE_UINT;
2873  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2874  if (scan_val.uint_val < 1 || scan_val.uint_val > 53)
2875  err = 1;
2876  break;
2877  case 'w':
2878  pfmt++;
2879  scan_type = PGTYPES_TYPE_UINT;
2880  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2881  if (scan_val.uint_val > 6)
2882  err = 1;
2883  break;
2884  case 'W':
2885  pfmt++;
2886  scan_type = PGTYPES_TYPE_UINT;
2887  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2888  if (scan_val.uint_val > 53)
2889  err = 1;
2890  break;
2891  case 'x':
2892  case 'X':
2893  /* XXX */
2894  break;
2895  case 'Y':
2896  pfmt++;
2897  scan_type = PGTYPES_TYPE_UINT;
2898  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2899  *year = scan_val.uint_val;
2900  break;
2901  case 'z':
2902  pfmt++;
2903  scan_type = PGTYPES_TYPE_STRING_MALLOCED;
2904  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2905  if (!err)
2906  {
2907  err = DecodeTimezone(scan_val.str_val, tz);
2908  free(scan_val.str_val);
2909  }
2910  break;
2911  case 'Z':
2912  pfmt++;
2913  scan_type = PGTYPES_TYPE_STRING_MALLOCED;
2914  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2915  if (!err)
2916  {
2917  /*
2918  * XXX use DecodeSpecial instead? Do we need strcasecmp
2919  * here?
2920  */
2921  err = 1;
2922  for (j = 0; j < szdatetktbl; j++)
2923  {
2924  if ((datetktbl[j].type == TZ || datetktbl[j].type == DTZ) &&
2926  scan_val.str_val) == 0)
2927  {
2928  *tz = -datetktbl[j].value;
2929  err = 0;
2930  break;
2931  }
2932  }
2933  free(scan_val.str_val);
2934  }
2935  break;
2936  case '+':
2937  /* XXX */
2938  break;
2939  case '%':
2940  pfmt++;
2941  if (*pstr == '%')
2942  pstr++;
2943  else
2944  err = 1;
2945  break;
2946  default:
2947  err = 1;
2948  }
2949  }
2950  if (!err)
2951  {
2952  if (*second < 0)
2953  *second = 0;
2954  if (*minute < 0)
2955  *minute = 0;
2956  if (*hour < 0)
2957  *hour = 0;
2958  if (*day < 0)
2959  {
2960  err = 1;
2961  *day = 1;
2962  }
2963  if (*month < 0)
2964  {
2965  err = 1;
2966  *month = 1;
2967  }
2968  if (*year < 0)
2969  {
2970  err = 1;
2971  *year = 1970;
2972  }
2973 
2974  if (*second > 59)
2975  {
2976  err = 1;
2977  *second = 0;
2978  }
2979  if (*minute > 59)
2980  {
2981  err = 1;
2982  *minute = 0;
2983  }
2984  if (*hour > 24 || /* test for > 24:00:00 */
2985  (*hour == 24 && (*minute > 0 || *second > 0)))
2986  {
2987  err = 1;
2988  *hour = 0;
2989  }
2990  if (*month > MONTHS_PER_YEAR)
2991  {
2992  err = 1;
2993  *month = 1;
2994  }
2995  if (*day > day_tab[isleap(*year)][*month - 1])
2996  {
2997  *day = day_tab[isleap(*year)][*month - 1];
2998  err = 1;
2999  }
3000 
3001  tm.tm_sec = *second;
3002  tm.tm_min = *minute;
3003  tm.tm_hour = *hour;
3004  tm.tm_mday = *day;
3005  tm.tm_mon = *month;
3006  tm.tm_year = *year;
3007 
3008  tm2timestamp(&tm, 0, tz, d);
3009  }
3010  return err;
3011 }
int tm2timestamp(struct pg_tm *tm, fsec_t fsec, int *tzp, Timestamp *result)
Definition: timestamp.c:1987
int PGTYPEStimestamp_defmt_scan(char **str, char *fmt, timestamp *d, int *year, int *month, int *day, int *hour, int *minute, int *second, int *tz)
Definition: dt_common.c:2521
char * pgtypes_date_months[]
Definition: dt_common.c:499
char * pgtypes_date_weekdays_short[]
Definition: dt_common.c:497
static int pgtypes_defmt_scan(union un_fmt_comb *scan_val, int scan_type, char **pstr, char *pfmt)
Definition: dt_common.c:2459
#define free(a)
Definition: header.h:65
char * pgtypes_alloc(long size)
Definition: common.c:10
int j
Definition: isn.c:73
int pg_strcasecmp(const char *s1, const char *s2)
Definition: pgstrcasecmp.c:36

References datetktbl, day_tab, days, DecodeTimezone(), DTZ, err(), fmt, free, isleap, j, un_fmt_comb::luint_val, months, MONTHS_PER_YEAR, pg_strcasecmp(), pgtypes_alloc(), pgtypes_date_months, pgtypes_date_weekdays_short, pgtypes_defmt_scan(), PGTYPES_TYPE_STRING_MALLOCED, PGTYPES_TYPE_UINT, PGTYPES_TYPE_UINT_LONG, PGTYPEStimestamp_defmt_scan(), str, un_fmt_comb::str_val, szdatetktbl, tm, tm2timestamp(), pg_tm::tm_hour, pg_tm::tm_mday, pg_tm::tm_min, pg_tm::tm_mon, pg_tm::tm_sec, pg_tm::tm_year, token, type, TZ, un_fmt_comb::uint_val, and datetkn::value.

Referenced by PGTYPEStimestamp_defmt_asc(), and PGTYPEStimestamp_defmt_scan().

◆ TrimTrailingZeros()

void TrimTrailingZeros ( char *  str)

Definition at line 722 of file dt_common.c.

723 {
724  int len = strlen(str);
725 
726  /* chop off trailing zeros... but leave at least 2 fractional digits */
727  while (*(str + len - 1) == '0' && *(str + len - 3) != '.')
728  {
729  len--;
730  *(str + len) = '\0';
731  }
732 }

References len, and str.

Referenced by AppendSeconds(), and EncodeDateTime().

Variable Documentation

◆ datecache

const datetkn* datecache[MAXDATEFIELDS] = {NULL}
static

Definition at line 489 of file dt_common.c.

Referenced by DecodeSpecial().

◆ datetktbl

const datetkn datetktbl[]
static

Definition at line 20 of file dt_common.c.

Referenced by DecodeSpecial(), and PGTYPEStimestamp_defmt_scan().

◆ day_tab

const int day_tab[2][13]
Initial value:
= {
{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0},
{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0}}

Definition at line 14 of file dt_common.c.

Referenced by DecodeDateTime(), and PGTYPEStimestamp_defmt_scan().

◆ days

char* days[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", NULL}

Definition at line 495 of file dt_common.c.

Referenced by EncodeDateTime(), and PGTYPEStimestamp_defmt_scan().

◆ deltacache

const datetkn* deltacache[MAXDATEFIELDS] = {NULL}
static

Definition at line 491 of file dt_common.c.

Referenced by DecodeUnits().

◆ deltatktbl

const datetkn deltatktbl[]
static

Definition at line 421 of file dt_common.c.

Referenced by DecodeUnits().

◆ months

char* months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL}

Definition at line 493 of file dt_common.c.

Referenced by EncodeDateTime(), and PGTYPEStimestamp_defmt_scan().

◆ pgtypes_date_months

char* pgtypes_date_months[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December", NULL}

◆ pgtypes_date_weekdays_short

char* pgtypes_date_weekdays_short[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL}

◆ szdatetktbl

const unsigned int szdatetktbl = lengthof(datetktbl)
static

Definition at line 486 of file dt_common.c.

Referenced by DecodeSpecial(), and PGTYPEStimestamp_defmt_scan().

◆ szdeltatktbl

const unsigned int szdeltatktbl = lengthof(deltatktbl)
static

Definition at line 487 of file dt_common.c.

Referenced by DecodeUnits().