granicus.if.org Git - postgresql/blob - src/backend/utils/adt/timestamp.c

   1 #include <time.h>
   2 #include <ctype.h>
   3
   4 #include "postgres.h"
   5 #include "access/xact.h"
   6 #include "miscadmin.h"
   7 #include "utils/builtins.h"
   8
   9 time_t
  10 timestamp_in(const char *timestamp_str)
  11 {
  12         int4            result;
  13
  14         result = nabstimein((char *) timestamp_str);
  15
  16         return result;
  17 }
  18
  19 char *
  20 timestamp_out(time_t timestamp)
  21 {
  22         char       *result;
  23         int                     tz;
  24         double          fsec = 0;
  25         struct tm       tt,
  26                            *tm = &tt;
  27         char            buf[MAXDATELEN + 1];
  28         char            zone[MAXDATELEN + 1],
  29                            *tzn = zone;
  30
  31         switch (timestamp)
  32         {
  33                 case EPOCH_ABSTIME:
  34                         strcpy(buf, EPOCH);
  35                         break;
  36                 case INVALID_ABSTIME:
  37                         strcpy(buf, INVALID);
  38                         break;
  39                 case CURRENT_ABSTIME:
  40                         strcpy(buf, DCURRENT);
  41                         break;
  42                 case NOEND_ABSTIME:
  43                         strcpy(buf, LATE);
  44                         break;
  45                 case NOSTART_ABSTIME:
  46                         strcpy(buf, EARLY);
  47                         break;
  48                 default:
  49                         abstime2tm(timestamp, &tz, tm, tzn);
  50                         EncodeDateTime(tm, fsec, &tz, &tzn, USE_ISO_DATES, buf);
  51                         break;
  52         }
  53
  54         result = palloc(strlen(buf) + 1);
  55         strcpy(result, buf);
  56         return result;
  57 }       /* timestamp_out() */
  58
  59 time_t
  60 now(void)
  61 {
  62         time_t          sec;
  63
  64         sec = GetCurrentTransactionStartTime();
  65         return sec;
  66 }
  67
  68 bool
  69 timestampeq(time_t t1, time_t t2)
  70 {
  71         return abstimeeq(t1, t2);
  72 }
  73
  74 bool
  75 timestampne(time_t t1, time_t t2)
  76 {
  77         return abstimene(t1, t2);
  78 }
  79
  80 bool
  81 timestamplt(time_t t1, time_t t2)
  82 {
  83         return abstimelt(t1, t2);
  84 }
  85
  86 bool
  87 timestampgt(time_t t1, time_t t2)
  88 {
  89         return abstimegt(t1, t2);
  90 }
  91
  92 bool
  93 timestample(time_t t1, time_t t2)
  94 {
  95         return abstimele(t1, t2);
  96 }
  97
  98 bool
  99 timestampge(time_t t1, time_t t2)
 100 {
 101         return abstimege(t1, t2);
 102 }
 103
 104 DateTime   *
 105 timestamp_datetime(time_t timestamp)
 106 {
 107         return abstime_datetime((AbsoluteTime) timestamp);
 108 }       /* timestamp_datetime() */
 109
 110 time_t
 111 datetime_timestamp(DateTime *datetime)
 112 {
 113         return (AbsoluteTime) datetime_abstime(datetime);
 114 }       /* datetime_timestamp() */