src/bin/unzip/timezone.h

   1 /*
   2   Copyright (c) 1990-2001 Info-ZIP.  All rights reserved.
   3
   4   See the accompanying file LICENSE, version 2000-Apr-09 or later
   5   (the contents of which are also included in zip.h) for terms of use.
   6   If, for some reason, all these files are missing, the Info-ZIP license
   7   also may be found at:  ftp://ftp.info-zip.org/pub/infozip/license.html
   8 */
   9 #ifndef __timezone_h
  10 #define __timezone_h
  11
  12 #ifndef IZ_MKTIME_ONLY
  13
  14 /* limits for our timezone info data:
  15  * we support only basic standard and daylight time, with max 2 transitions
  16  * per year, but for the maximum range of years a 32-bit second counter
  17  * can cover (these are 136 years plus a bit more than one month)
  18  */
  19 #define TZ_MAX_TIMES    272 /* (=2*(LastGoodYr + 1 - FirstGoodYr) */
  20 #define TZ_MAX_TYPES    2   /* We only support basic standard and daylight */
  21 #ifdef WIN32    /* Win32 tzinfo supplies at max (2 * 32) chars of tz names */
  22 #define TZ_MAX_CHARS    64  /* Maximum number of abbreviation characters */
  23 #else
  24 #define TZ_MAX_CHARS    50  /* Maximum number of abbreviation characters */
  25 #endif
  26
  27 /* supported types of transition rules */
  28 #define JULIAN_DAY              0   /* Jn - Julian day */
  29 #define DAY_OF_YEAR             1   /* n - day of year */
  30 #define MONTH_NTH_DAY_OF_WEEK   2   /* Mm.n.d - month, week, day of week */
  31
  32
  33 struct ttinfo {
  34     long            tt_gmtoff;  /* UTC offset in seconds */
  35     int             tt_isdst;   /* used to set tm_isdst */
  36     int             tt_abbrind; /* abbreviation list index */
  37 };
  38
  39 struct state {
  40     int             timecnt;
  41     int             typecnt;
  42     int             charcnt;
  43     time_t          ats[TZ_MAX_TIMES];
  44     unsigned char   types[TZ_MAX_TIMES];
  45     struct ttinfo   ttis[TZ_MAX_TYPES];
  46     char            chars[TZ_MAX_CHARS];
  47 };
  48
  49 struct rule {
  50     int             r_type;     /* type of rule--JULIAN_DAY etc */
  51     int             r_day;      /* day number of rule */
  52     int             r_week;     /* week number of rule */
  53     int             r_mon;      /* month number of rule */
  54     long            r_time;     /* transition time of rule */
  55 };
  56
  57 extern int real_timezone_is_set;        /* set by tzset() */
  58
  59
  60 /* prototypes of functions not in time.h */
  61
  62 void __tzset OF((void));
  63
  64 #ifdef NEED__ISINDST
  65 int _isindst OF((struct tm *tb));
  66 #endif
  67
  68 /* callback function to be supplied by the program that uses this library */
  69 int GetPlatformLocalTimezone OF((register struct state * ZCONST sp,
  70         void (*fill_tzstate_from_rules)(struct state * ZCONST sp_res,
  71                                         ZCONST struct rule * ZCONST start,
  72                                         ZCONST struct rule * ZCONST end)));
  73 #ifdef IZTZ_SETLOCALTZINFO
  74 void set_TZ OF((long time_zone, int day_light));
  75 #endif
  76
  77 #endif /* !IZ_MKTIME_ONLY */
  78
  79 time_t mkgmtime OF((struct tm *tm));
  80
  81 #endif