src/timezone/pgtz.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * pgtz.h
   4  *        Timezone Library Integration Functions
   5  *
   6  * Note: this file contains only definitions that are private to the
   7  * timezone library.  Public definitions are in pgtime.h.
   8  *
   9  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  10  *
  11  * IDENTIFICATION
  12  *        $PostgreSQL$
  13  *
  14  *-------------------------------------------------------------------------
  15  */
  16 #ifndef _PGTZ_H
  17 #define _PGTZ_H
  18
  19 #include "tzfile.h"
  20 #include "pgtime.h"
  21
  22
  23 #define BIGGEST(a, b)   (((a) > (b)) ? (a) : (b))
  24
  25 struct ttinfo
  26 {                                                               /* time type information */
  27         long            tt_gmtoff;              /* UTC offset in seconds */
  28         int                     tt_isdst;               /* used to set tm_isdst */
  29         int                     tt_abbrind;             /* abbreviation list index */
  30         int                     tt_ttisstd;             /* TRUE if transition is std time */
  31         int                     tt_ttisgmt;             /* TRUE if transition is UTC */
  32 };
  33
  34 struct lsinfo
  35 {                                                               /* leap second information */
  36         pg_time_t       ls_trans;               /* transition time */
  37         long            ls_corr;                /* correction to apply */
  38 };
  39
  40 struct state
  41 {
  42         int                     leapcnt;
  43         int                     timecnt;
  44         int                     typecnt;
  45         int                     charcnt;
  46         int                     goback;
  47         int                     goahead;
  48         pg_time_t       ats[TZ_MAX_TIMES];
  49         unsigned char types[TZ_MAX_TIMES];
  50         struct ttinfo ttis[TZ_MAX_TYPES];
  51         char            chars[BIGGEST(BIGGEST(TZ_MAX_CHARS + 1, 3 /* sizeof gmt */ ),
  52                                                                                   (2 * (TZ_STRLEN_MAX + 1)))];
  53         struct lsinfo lsis[TZ_MAX_LEAPS];
  54 };
  55
  56
  57 struct pg_tz
  58 {
  59         /* TZname contains the canonically-cased name of the timezone */
  60         char            TZname[TZ_STRLEN_MAX + 1];
  61         struct state state;
  62 };
  63
  64
  65 /* in pgtz.c */
  66 extern int      pg_open_tzfile(const char *name, char *canonname);
  67
  68 /* in localtime.c */
  69 extern int tzload(const char *name, char *canonname, struct state * sp,
  70            int doextend);
  71 extern int      tzparse(const char *name, struct state * sp, int lastditch);
  72
  73 #endif   /* _PGTZ_H */