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#include <stdio.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include "postgres.h"
#include "miscadmin.h"
#include "utils/builtins.h"
/* sunos doesn't have this function */
#if defined(sunos4)
#define difftime(time1,time0) ((time1) - (time0))
#endif
#if FALSE
/* copy the next part of the string into a buffer */
static const char *
cpstr(const char *s, char *buf)
{
char in = 0;
while (isspace(*s))
s++;
for (; *s && !isspace(*s); s++)
{
if (strchr("-,:/", *s))
{
buf[in] = 0;
return(s + 1);
}
if (in < 16)
buf[in++] = tolower(*s);
}
buf[in] = 0;
return s;
}
#endif
/* assumes dd/mm/yyyy unless first item is month in word form */
time_t
timestamp_in(const char *timestamp_str)
{
int4 result;
#if FALSE
struct tm input_time;
char buf[18];
const char *p;
static const char *mstr[] = {
"january", "february", "march", "april", "may", "june",
"july", "august", "september", "october", "november", "december"
};
memset(&input_time, 0, sizeof(input_time));
p = cpstr(timestamp_str, buf);
if (isdigit(buf[0])) /* must be dd/mm/yyyy */
{
input_time.tm_mday = atoi(buf);
p = cpstr(p, buf);
if (!buf[0])
elog(WARN, "timestamp_in: timestamp \"%s\" not a proper date",
timestamp_str);
if (isdigit(buf[0]))
{
input_time.tm_mon = atoi(buf) - 1;
if (input_time.tm_mon < 0 || input_time.tm_mon > 11)
elog(WARN, "timestamp_in: timestamp \"%s\" invalid month",
timestamp_str);
}
else
{
int i;
for (i = 0; i < 12; i++)
if (strncmp(mstr[i], buf, strlen(buf)) == 0)
break;
if (1 > 11)
elog(WARN, "timestamp_in: timestamp \"%s\" invalid month",
timestamp_str);
input_time.tm_mon = i;
}
}
else /* must be month/dd/yyyy */
{
int i;
for (i = 0; i < 12; i++)
if (strncmp(mstr[i], buf, strlen(buf)) == 0)
break;
if (1 > 11)
elog(WARN, "timestamp_in: timestamp \"%s\" invalid month",
timestamp_str);
input_time.tm_mon = i;
p = cpstr(p, buf);
input_time.tm_mday = atoi(buf);
if (!input_time.tm_mday || input_time.tm_mday > 31)
elog(WARN, "timestamp_in: timestamp \"%s\" not a proper date",
timestamp_str);
}
p = cpstr(p, buf);
if (!buf[0] || !isdigit(buf[0]))
elog(WARN, "timestamp_in: timestamp \"%s\" not a proper date",
timestamp_str);
if ((input_time.tm_year = atoi(buf)) < 1900)
input_time.tm_year += 1900;
/* now get the time */
p = cpstr(p, buf);
input_time.tm_hour = atoi(buf);
p = cpstr(p, buf);
input_time.tm_min = atoi(buf);
p = cpstr(p, buf);
input_time.tm_sec = atoi(buf);
/* use mktime(), but make this GMT, not local time */
result = mktime(&input_time);
#endif
result = nabstimein( (char *) timestamp_str);
return result;
}
char *
timestamp_out(time_t timestamp)
{
char *result;
int tz;
double fsec = 0;
struct tm tt, *tm = &tt;
char buf[MAXDATELEN+1];
char zone[MAXDATELEN+1], *tzn = zone;
#if FALSE
time = localtime(×tamp);
sprintf(result, "%04d-%02d-%02d %02d:%02d:%02d",
time->tm_year+1900, time->tm_mon+1, time->tm_mday,
time->tm_hour, time->tm_min, time->tm_sec);
#endif
abstime2tm( timestamp, &tz, tm, tzn);
EncodeDateTime( tm, fsec, &tz, &tzn, USE_ISO_DATES, buf);
result = palloc(strlen(buf)+1);
strcpy( result, buf);
return result;
}
time_t
now(void)
{
time_t sec;
time(&sec);
return(sec);
}
bool
timestampeq(time_t t1, time_t t2)
{
return difftime(t1, t2) == 0;
}
bool
timestampne(time_t t1, time_t t2)
{
return difftime(t1, t2) != 0;
}
bool
timestamplt(time_t t1, time_t t2)
{
return difftime(t1, t2) > 0;
}
bool
timestampgt(time_t t1, time_t t2)
{
return difftime(t1, t2) < 0;
}
bool
timestample(time_t t1, time_t t2)
{
return difftime(t1, t2) >= 0;
}
bool
timestampge(time_t t1, time_t t2)
{
return difftime(t1, t2) <= 0;
}
DateTime *
timestamp_datetime(time_t timestamp)
{
DateTime *result;
double fsec = 0;
struct tm *tm;
if (!PointerIsValid(result = PALLOCTYPE(DateTime)))
elog(WARN,"Memory allocation failed, can't convert timestamp to datetime",NULL);
tm = localtime((time_t *) ×tamp);
tm->tm_year += 1900;
tm->tm_mon += 1;
if (tm2datetime(tm, fsec, NULL, result) != 0)
elog(WARN,"Unable to convert timestamp to datetime",timestamp_out(timestamp));
return(result);
} /* timestamp_datetime() */
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