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Document TimeZoneRule
This is loaded from the [[Title_list|TimeZoneBinary]] title with the specified LocationName under the zoneinfo/ directory, the content is then converted into this TimeZoneRule structure.
This is loaded from the [[Title_list|TimeZoneBinary]] title with the specified LocationName under the zoneinfo/ directory, the content is then converted into this TimeZoneRule structure.
The files contained under zoneinfo/ directory are Tzif2 files without Tzif1 header and data at the begining of them (see [https://tools.ietf.org/html/rfc8536 RFC8536] for more information).
The conversion of a Tzif2 file to a TimeZoneRule structure is based on [https://github.com/eggert/tz/blob/master/localtime.c tz database code] with some custom modifications (Leap seconds aren't handled, no usage of "posixrules" and Tzif1 support stripped out).
{| class="wikitable" border="1"
|-
! Offset || Size || Description
|-
| 0x0 || 0x4 || timecnt
|-
| 0x4 || 0x4 || typecnt
|-
| 0x8 || 0x4 || charcnt
|-
| 0xC || 0x1 || goback
|-
| 0xD || 0x1 || goahead
|-
| 0xE || 0x2 || Padding
|-
| 0x10 || 0x8 * 1000 || ats
|-
| 0x1f50 || 0x1 * 1000 || types
|-
| 0x2338 || 0x10 * 128 || ttis (time type information), struct ttinfo[1000]
|-
| 0x2b38 || 0x1 * 512 || chars
|-
| 0x2d38 || 0x4 || defaulttype
|-
| 0x2d3c || 0x12c4 || Reserved / Unused
|}
=== ttinfo ===
This is an 0x10-byte struct.
Represent a Time Type Information used in [[#TimeZoneRule]].
{| class="wikitable" border="1"
|-
! Offset || Size || Description
|-
| 0x0 || 0x4 || tt_gmtoff
|-
| 0x4 || 0x1 || tt_isdst
|-
| 0x5 || 0x3 || Padding
|-
| 0x8 || 0x4 || tt_abbrind
|-
| 0xC || 0x1 || tt_ttisstd
|-
| 0xD || 0x1 || tt_ttisgmt
|-
| 0xE || 0x2 || Padding
|}
=== TimeZoneRuleVersion ===
=== TimeZoneRuleVersion ===