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Diffstat (limited to 'src/backend/utils/nabstime.h')
| -rw-r--r-- | src/backend/utils/nabstime.h | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/backend/utils/nabstime.h b/src/backend/utils/nabstime.h new file mode 100644 index 00000000000..68857656e9b --- /dev/null +++ b/src/backend/utils/nabstime.h @@ -0,0 +1,165 @@ +/*------------------------------------------------------------------------- + * + * nabstime.h-- + * Definitions for the "new" abstime code. + * + * + * Copyright (c) 1994, Regents of the University of California + * + * $Id: nabstime.h,v 1.1.1.1 1996/07/09 06:22:02 scrappy Exp $ + * + *------------------------------------------------------------------------- + */ +#ifndef NABSTIME_H +#define NABSTIME_H + +#include <sys/types.h> +#include <time.h> +#if !defined(PORTNAME_irix5) +#include <sys/timeb.h> +#endif +#include "miscadmin.h" /* for SystemTime */ + +/* ---------------------------------------------------------------- + * time types + support macros + * + * + * ---------------------------------------------------------------- + */ +typedef int32 AbsoluteTime; +typedef int32 RelativeTime; + +typedef struct { + int32 status; + AbsoluteTime data[2]; +} TimeIntervalData; +typedef TimeIntervalData *TimeInterval; + +#define EPOCH_ABSTIME ((AbsoluteTime) 0) +#define INVALID_ABSTIME ((AbsoluteTime) 2147483647) /* 2^31 - 1 */ +#define CURRENT_ABSTIME ((AbsoluteTime) 2147483646) /* 2^31 - 2 */ +#define NOEND_ABSTIME ((AbsoluteTime) 2147483645) /* 2^31 - 3 */ + + +#if defined(PORTNAME_aix) +/* + * AIX considers 2147483648 == -2147483648 (since they have the same bit + * representation) but uses a different sign sense in a comparison to + * these integer constants depending on whether the constant is signed + * or not! + */ +#include <values.h> +/*#define NOSTART_ABSTIME ((AbsoluteTime) HIBITI) */ /* - 2^31 */ +#define NOSTART_ABSTIME ((AbsoluteTime) INT_MIN) +#else +/*#define NOSTART_ABSTIME ((AbsoluteTime) 2147483648)*/ /* - 2^31 */ +#define NOSTART_ABSTIME ((AbsoluteTime) -2147483647) /* - 2^31 */ +#endif /* PORTNAME_aix */ + +#define INVALID_RELTIME ((RelativeTime) 2147483647) /* 2^31 - 1 */ + +/* ---------------- + * time support macros (from tim.h) + * ---------------- + */ + +#define AbsoluteTimeIsValid(time) \ + ((bool) ((time) != INVALID_ABSTIME)) + +#define AbsoluteTimeIsReal(time) \ + ((bool) (((AbsoluteTime) time) < NOEND_ABSTIME && \ + ((AbsoluteTime) time) > NOSTART_ABSTIME)) + +/* have to include this because EPOCH_ABSTIME used to be invalid - yuk */ +#define AbsoluteTimeIsBackwardCompatiblyValid(time) \ + ((bool) (((AbsoluteTime) time) != INVALID_ABSTIME && \ + ((AbsoluteTime) time) > EPOCH_ABSTIME)) + +#define AbsoluteTimeIsBackwardCompatiblyReal(time) \ + ((bool) (((AbsoluteTime) time) < NOEND_ABSTIME && \ + ((AbsoluteTime) time) > NOSTART_ABSTIME && \ + ((AbsoluteTime) time) > EPOCH_ABSTIME)) + +#define RelativeTimeIsValid(time) \ + ((bool) (((RelativeTime) time) != INVALID_RELTIME)) + +#define GetCurrentAbsoluteTime() \ + ((AbsoluteTime) getSystemTime()) + +/* + * getSystemTime -- + * Returns system time. + */ +#define getSystemTime() \ + ((time_t) (time(0l))) + + +/* + * Meridian: am, pm, or 24-hour style. + */ +#define AM 0 +#define PM 1 +#define HR24 2 + +/* can't have more of these than there are bits in an unsigned long */ +#define MONTH 1 +#define YEAR 2 +#define DAY 3 +#define TIME 4 +#define TZ 5 +#define DTZ 6 +#define PG_IGNORE 7 +#define AMPM 8 +/* below here are unused so far */ +#define SECONDS 9 +#define MONTHS 10 +#define YEARS 11 +#define NUMBER 12 +/* these are only for relative dates */ +#define ABS_BEFORE 13 +#define ABS_AFTER 14 +#define AGO 15 + + +#define SECS(n) ((time_t)(n)) +#define MINS(n) ((time_t)(n) * SECS(60)) +#define HOURS(n) ((time_t)(n) * MINS(60)) /* 3600 secs */ +#define DAYS(n) ((time_t)(n) * HOURS(24)) /* 86400 secs */ +/* months and years are not constant length, must be specially dealt with */ + +#define TOKMAXLEN 6 /* only this many chars are stored in datetktbl */ + +/* keep this struct small; it gets used a lot */ +typedef struct { +#if defined(PORTNAME_aix) + char *token; +#else + char token[TOKMAXLEN]; +#endif /* PORTNAME_aix */ + char type; + char value; /* this may be unsigned, alas */ +} datetkn; + +/* + * nabstime.c prototypes + */ +extern AbsoluteTime nabstimein(char *timestr); +extern int prsabsdate(char *timestr, struct tm *tm, int *tzp); +extern int tryabsdate(char *fields[], int nf, struct tm *tm, int *tzp); +extern int parsetime(char *time, struct tm *tm); +extern int split(char *string, char *fields[], int nfields, char *sep); +extern char *nabstimeout(AbsoluteTime time); +extern AbsoluteTime dateconv(struct tm *tm, int zone); +extern time_t qmktime(struct tm *tp); +extern datetkn *datetoktype(char *s, int *bigvalp); +extern datetkn *datebsearch(char *key, datetkn *base, unsigned int nel); +extern bool AbsoluteTimeIsBefore(AbsoluteTime time1, AbsoluteTime time2); +extern bool AbsoluteTimeIsAfter(AbsoluteTime time1, AbsoluteTime time2); +extern int32 abstimeeq(AbsoluteTime t1, AbsoluteTime t2); +extern int32 abstimene(AbsoluteTime t1, AbsoluteTime t2); +extern int32 abstimelt(AbsoluteTime t1, AbsoluteTime t2); +extern int32 abstimegt(AbsoluteTime t1, AbsoluteTime t2); +extern int32 abstimele(AbsoluteTime t1, AbsoluteTime t2); +extern int32 abstimege(AbsoluteTime t1, AbsoluteTime t2); + +#endif /* NABSTIME_H */ |