Function parse [src]

Prototype

pub fn parse(allocator: Allocator, reader: *Reader) !Tz

Parameters

allocator: Allocatorreader: *Reader

Source

  pub fn parse(allocator: Allocator, reader: *Reader) !Tz {
    const legacy_header = try reader.takeStruct(Header, .big);
    if (!std.mem.eql(u8, &legacy_header.magic, "TZif")) return error.BadHeader;
    if (legacy_header.version != 0 and legacy_header.version != '2' and legacy_header.version != '3')
        return error.BadVersion;

    if (legacy_header.version == 0)
        return parseBlock(allocator, reader, legacy_header, true);

    // If the format is modern, just skip over the legacy data
    const skip_n = legacy_header.counts.timecnt * 5 +
        legacy_header.counts.typecnt * 6 +
        legacy_header.counts.charcnt + legacy_header.counts.leapcnt * 8 +
        legacy_header.counts.isstdcnt + legacy_header.counts.isutcnt;
    try reader.discardAll(skip_n);

    var header = try reader.takeStruct(Header, .big);
    if (!std.mem.eql(u8, &header.magic, "TZif")) return error.BadHeader;
    if (header.version != '2' and header.version != '3') return error.BadVersion;

    return parseBlock(allocator, reader, header, false);
}  