1 files changed, 94 insertions, 0 deletions
diff --git a/src/include/pgtime.h b/src/include/pgtime.h
new file mode 100644
index 0000000..9d4b2ef
--- /dev/null
+++ b/src/include/pgtime.h
@@ -0,0 +1,94 @@
+/*-------------------------------------------------------------------------
+ *
+ * pgtime.h
+ *	  PostgreSQL internal timezone library
+ *
+ * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ *	  src/include/pgtime.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef _PGTIME_H
+#define _PGTIME_H
+
+
+/*
+ * The API of this library is generally similar to the corresponding
+ * C library functions, except that we use pg_time_t which (we hope) is
+ * 64 bits wide, and which is most definitely signed not unsigned.
+ */
+
+typedef int64 pg_time_t;
+
+/*
+ * Data structure representing a broken-down timestamp.
+ *
+ * CAUTION: the IANA timezone library (src/timezone/) follows the POSIX
+ * convention that tm_mon counts from 0 and tm_year is relative to 1900.
+ * However, Postgres' datetime functions generally treat tm_mon as counting
+ * from 1 and tm_year as relative to 1 BC.  Be sure to make the appropriate
+ * adjustments when moving from one code domain to the other.
+ */
+struct pg_tm
+{
+	int			tm_sec;
+	int			tm_min;
+	int			tm_hour;
+	int			tm_mday;
+	int			tm_mon;			/* see above */
+	int			tm_year;		/* see above */
+	int			tm_wday;
+	int			tm_yday;
+	int			tm_isdst;
+	long int	tm_gmtoff;
+	const char *tm_zone;
+};
+
+/* These structs are opaque outside the timezone library */
+typedef struct pg_tz pg_tz;
+typedef struct pg_tzenum pg_tzenum;
+
+/* Maximum length of a timezone name (not including trailing null) */
+#define TZ_STRLEN_MAX 255
+
+/* these functions are in localtime.c */
+
+extern struct pg_tm *pg_localtime(const pg_time_t *timep, const pg_tz *tz);
+extern struct pg_tm *pg_gmtime(const pg_time_t *timep);
+extern int	pg_next_dst_boundary(const pg_time_t *timep,
+								 long int *before_gmtoff,
+								 int *before_isdst,
+								 pg_time_t *boundary,
+								 long int *after_gmtoff,
+								 int *after_isdst,
+								 const pg_tz *tz);
+extern bool pg_interpret_timezone_abbrev(const char *abbrev,
+										 const pg_time_t *timep,
+										 long int *gmtoff,
+										 int *isdst,
+										 const pg_tz *tz);
+extern bool pg_get_timezone_offset(const pg_tz *tz, long int *gmtoff);
+extern const char *pg_get_timezone_name(pg_tz *tz);
+extern bool pg_tz_acceptable(pg_tz *tz);
+
+/* these functions are in strftime.c */
+
+extern size_t pg_strftime(char *s, size_t maxsize, const char *format,
+						  const struct pg_tm *t);
+
+/* these functions and variables are in pgtz.c */
+
+extern PGDLLIMPORT pg_tz *session_timezone;
+extern PGDLLIMPORT pg_tz *log_timezone;
+
+extern void pg_timezone_initialize(void);
+extern pg_tz *pg_tzset(const char *tzname);
+extern pg_tz *pg_tzset_offset(long gmtoffset);
+
+extern pg_tzenum *pg_tzenumerate_start(void);
+extern pg_tz *pg_tzenumerate_next(pg_tzenum *dir);
+extern void pg_tzenumerate_end(pg_tzenum *dir);
+
+#endif							/* _PGTIME_H */