53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/*
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**********************************************************************
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* Copyright (C) 1999, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* Date Name Description
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* 11/24/99 aliu Creation.
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**********************************************************************
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*/
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#ifndef TZDAT_H
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#define TZDAT_H
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#include "utypes.h"
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/* This file defines the format of the memory-mapped data file
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* containing system time zone data for icu. See also gentz
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* and tz.pl.
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*/
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struct TZHeader {
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uint16_t versionYear; // e.g. "1999j" -> 1999
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uint16_t versionSuffix; // e.g. "1999j" -> 10
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uint32_t standardCount; // # of standard rules
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uint32_t standardOffset; // offset to standard rules
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uint32_t dstCount; // # of dst rules
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uint32_t dstOffset; // offset to dst rules
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uint32_t nameTableOffset; // offset to name table
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};
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struct StandardZone {
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uint32_t nameOffset; // offset *within name table* to name
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int32_t gmtOffset; // gmtoffset in seconds
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};
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struct TZRule {
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uint8_t month; // month
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int8_t dowim; // dowim
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int8_t dow; // dow
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uint16_t time; // time minutes
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int8_t mode; // mode ('w', 's', 'u')
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};
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struct DSTZone {
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uint32_t nameOffset; // offset within name table to name
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int32_t gmtOffset; // gmtoffset in seconds
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uint16_t dstSavings; // savings in minutes
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TZRule onsetRule; // onset rule
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TZRule ceaseRule; // cease rule
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};
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#endif
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