1 files changed, 81 insertions, 0 deletions
diff --git a/src/timezone/pgtz.h b/src/timezone/pgtz.h
new file mode 100644
index 0000000..ca01722
--- /dev/null
+++ b/src/timezone/pgtz.h
@@ -0,0 +1,81 @@
+/*-------------------------------------------------------------------------
+ *
+ * pgtz.h
+ *	  Timezone Library Integration Functions
+ *
+ * Note: this file contains only definitions that are private to the
+ * timezone library.  Public definitions are in pgtime.h.
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ *	  src/timezone/pgtz.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef _PGTZ_H
+#define _PGTZ_H
+
+#include "pgtime.h"
+#include "tzfile.h"
+
+
+#define SMALLEST(a, b)	(((a) < (b)) ? (a) : (b))
+#define BIGGEST(a, b)	(((a) > (b)) ? (a) : (b))
+
+struct ttinfo
+{								/* time type information */
+	int32		tt_utoff;		/* UT offset in seconds */
+	bool		tt_isdst;		/* used to set tm_isdst */
+	int			tt_desigidx;	/* abbreviation list index */
+	bool		tt_ttisstd;		/* transition is std time */
+	bool		tt_ttisut;		/* transition is UT */
+};
+
+struct lsinfo
+{								/* leap second information */
+	pg_time_t	ls_trans;		/* transition time */
+	int64		ls_corr;		/* correction to apply */
+};
+
+struct state
+{
+	int			leapcnt;
+	int			timecnt;
+	int			typecnt;
+	int			charcnt;
+	bool		goback;
+	bool		goahead;
+	pg_time_t	ats[TZ_MAX_TIMES];
+	unsigned char types[TZ_MAX_TIMES];
+	struct ttinfo ttis[TZ_MAX_TYPES];
+	char		chars[BIGGEST(BIGGEST(TZ_MAX_CHARS + 1, 4 /* sizeof gmt */ ),
+							  (2 * (TZ_STRLEN_MAX + 1)))];
+	struct lsinfo lsis[TZ_MAX_LEAPS];
+
+	/*
+	 * The time type to use for early times or if no transitions. It is always
+	 * zero for recent tzdb releases. It might be nonzero for data from tzdb
+	 * 2018e or earlier.
+	 */
+	int			defaulttype;
+};
+
+
+struct pg_tz
+{
+	/* TZname contains the canonically-cased name of the timezone */
+	char		TZname[TZ_STRLEN_MAX + 1];
+	struct state state;
+};
+
+
+/* in pgtz.c */
+extern int	pg_open_tzfile(const char *name, char *canonname);
+
+/* in localtime.c */
+extern int	tzload(const char *name, char *canonname, struct state *sp,
+				   bool doextend);
+extern bool tzparse(const char *name, struct state *sp, bool lastditch);
+
+#endif							/* _PGTZ_H */