| 1 | # -*- coding: utf-8 -*-
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| 2 | # $Id: timezoneinfo-gen.py 93115 2022-01-01 11:31:46Z vboxsync $
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| 3 |
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| 4 | """
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| 5 | Generates timezone mapping info from public domain tz data and
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| 6 | simple windows tables.
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| 7 | """
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| 8 | from __future__ import print_function;
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| 9 |
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| 10 | __copyright__ = \
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| 11 | """
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| 12 | Copyright (C) 2017-2022 Oracle Corporation
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| 13 |
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| 14 | This file is part of VirtualBox Open Source Edition (OSE), as
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| 15 | available from http://www.virtualbox.org. This file is free software;
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| 16 | you can redistribute it and/or modify it under the terms of the GNU
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| 17 | General Public License (GPL) as published by the Free Software
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| 18 | Foundation, in version 2 as it comes in the "COPYING" file of the
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| 19 | VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 20 | hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 21 |
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| 22 | The contents of this file may alternatively be used under the terms
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| 23 | of the Common Development and Distribution License Version 1.0
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| 24 | (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 25 | VirtualBox OSE distribution, in which case the provisions of the
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| 26 | CDDL are applicable instead of those of the GPL.
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| 27 |
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| 28 | You may elect to license modified versions of this file under the
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| 29 | terms and conditions of either the GPL or the CDDL or both.
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| 30 | """
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| 31 | __version__ = "$Revision: 93115 $"
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| 32 |
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| 33 | import os;
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| 34 | import sys;
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| 35 | import xml.etree.ElementTree as ElementTree;
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| 36 |
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| 37 |
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| 38 | class TzWinZoneEntry(object):
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| 39 | def __init__(self):
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| 40 | self.sWinName = None;
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| 41 | self.sWinTerritory = None;
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| 42 | self.fWinGolden = False;
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| 43 | self.idxWin = 0;
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| 44 |
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| 45 | class TzLinkEntry(TzWinZoneEntry):
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| 46 | def __init__(self, sLinkNm, sTarget):
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| 47 | TzWinZoneEntry.__init__(self);
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| 48 | self.sLinkNm = sLinkNm;
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| 49 | self.sTarget = sTarget;
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| 50 |
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| 51 | class TzZoneOffset(object):
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| 52 | def __init__(self, asFields):
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| 53 | self.sOffset = asFields[0]; # GMT offset expression
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| 54 | self.sRules = asFields[1] if len(asFields) > 1 and asFields[1] not in [ '-', '' ] else None;
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| 55 | self.sFormat = asFields[2] if len(asFields) > 2 and asFields[2] not in [ '-', '' ] else None;
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| 56 | self.sUntil = asFields[3] if len(asFields) > 3 and asFields[3] not in [ '-', '' ] else None;
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| 57 |
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| 58 | class TzZoneEntry(TzWinZoneEntry):
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| 59 | def __init__(self, sName):
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| 60 | TzWinZoneEntry.__init__(self);
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| 61 | self.sName = sName;
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| 62 | self.sTerritory = 'ZZ';
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| 63 | self.aOffsets = []; # type: list(TzZoneOffset)
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| 64 |
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| 65 | class TzZoneRule(object):
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| 66 | def __init__(self, sName, sFrom, sTo, sType, sIn, sOn, sAt, sSave, sLetter):
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| 67 | self.sName = sName;
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| 68 | self.sFrom = sFrom if sFrom not in [ '-', '' ] else None;
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| 69 | self.sTo = sTo if sFrom not in [ '-', '' ] else None;
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| 70 | self.sType = sType if sType not in [ '-', '' ] else None;
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| 71 | self.sIn = sIn if sIn not in [ '-', '' ] else None;
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| 72 | self.sAt = sAt if sAt not in [ '-', '' ] else None;
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| 73 | self.sSave = sSave if sSave not in [ '-', '' ] else None;
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| 74 | self.sLetter = sLetter if sLetter not in [ '-', '' ] else None;
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| 75 |
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| 76 | def info(sMsg):
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| 77 | """
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| 78 | Outputs an informational message to stderr.
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| 79 | """
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| 80 | print('info: ' + sMsg, file=sys.stderr);
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| 81 |
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| 82 | def warning(sMsg):
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| 83 | """
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| 84 | Outputs a warning (to stderr).
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| 85 | """
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| 86 | print('warning: ' + sMsg, file=sys.stderr);
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| 87 |
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| 88 | def error(sMsg):
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| 89 | """
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| 90 | Outputs a warning (to stderr).
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| 91 | """
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| 92 | print('error: ' + sMsg, file=sys.stderr);
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| 93 |
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| 94 | def readTzDataFile(sFile):
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| 95 | """ Reads the given data file into memory, stripping comments. """
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| 96 | oInFile = open(sFile, 'r');
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| 97 | asLines = oInFile.readlines();
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| 98 | oInFile.close();
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| 99 | iLine = 0;
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| 100 | while iLine < len(asLines):
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| 101 | offHash = asLines[iLine].find('#');
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| 102 | if offHash >= 0:
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| 103 | asLines[iLine] = asLines[iLine][:offHash].rstrip();
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| 104 | else:
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| 105 | asLines[iLine] = asLines[iLine].rstrip();
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| 106 | iLine += 1;
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| 107 | return asLines;
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| 108 |
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| 109 | #
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| 110 | # tzdata structures.
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| 111 | #
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| 112 | g_dZones = {};
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| 113 | g_dRules = {};
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| 114 | g_dLinks = {};
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| 115 |
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| 116 | def readTzData(sTzDataDir):
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| 117 | """
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| 118 | Reads in the bits we want from tz data. Assumes 2017b edition.
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| 119 | """
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| 120 |
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| 121 | #
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| 122 | # Parse the tzdata files.
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| 123 | #
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| 124 | for sFile in [ 'africa', 'antarctica', 'asia', 'australasia', 'europe', 'northamerica', 'southamerica',
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| 125 | 'pacificnew', 'etcetera', 'backward', 'systemv', 'factory', #'backzone'
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| 126 | ]:
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| 127 | sIn = 'none';
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| 128 | asLines = readTzDataFile(os.path.join(sTzDataDir, sFile));
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| 129 | iLine = 0;
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| 130 | while iLine < len(asLines):
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| 131 | sLine = asLines[iLine];
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| 132 | sStrippedLine = sLine.strip(); # Fully stripped version.
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| 133 | if sStrippedLine:
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| 134 | asFields = sLine.split();
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| 135 | try:
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| 136 | if sLine.startswith('Zone'): # 'Rule' NAME FROM TO TYPE IN ON AT SAVE LETTER/S
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| 137 | sIn = 'Zone';
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| 138 | oZone = TzZoneEntry(asFields[1]);
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| 139 | if oZone.sName in g_dZones: raise Exception('duplicate: %s' % (oZone.sName,));
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| 140 | g_dZones[oZone.sName] = oZone;
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| 141 | oZone.aOffsets.append(TzZoneOffset(asFields[2:]));
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| 142 | elif sLine.startswith('Rule'): # 'Rule' NAME FROM TO TYPE IN ON AT SAVE LETTER/S
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| 143 | oRule = TzZoneRule(asFields[1], asFields[2], asFields[3], asFields[4], asFields[5],
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| 144 | asFields[6], asFields[7], asFields[8], asFields[9]);
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| 145 | if oRule.sName not in g_dRules:
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| 146 | g_dRules[oRule] = [oRule,];
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| 147 | else:
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| 148 | g_dRules[oRule].append(oRule);
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| 149 | elif sLine.startswith('Link'):
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| 150 | if len(asFields) != 3: raise Exception("malformed link: len(asFields) = %d" % (len(asFields)));
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| 151 | oLink = TzLinkEntry(asFields[2].strip(), asFields[1].strip());
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| 152 | if oLink.sLinkNm not in g_dLinks:
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| 153 | g_dLinks[oLink.sLinkNm] = oLink;
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| 154 | elif g_dLinks[oLink.sLinkNm].sTarget != oLink.sTarget:
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| 155 | warning('duplicate link for %s: new target %s, previous %s'
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| 156 | % (oLink.sLinkNm, oLink.sTarget, g_dLinks[oLink.sLinkNm].sTarget,));
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| 157 | elif sIn == 'Zone':
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| 158 | oZone.aOffsets.append(TzZoneEntry(asFields[3:]));
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| 159 | else:
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| 160 | raise Exception('what is this?')
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| 161 | except Exception as oXcpt:
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| 162 | error("line %u in %s: '%s'" % (iLine + 1, sFile, type(oXcpt) if not str(oXcpt) else str(oXcpt),));
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| 163 | info("'%s'" % (asLines[iLine],));
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| 164 | return 1;
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| 165 | iLine += 1;
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| 166 |
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| 167 | #
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| 168 | # Process the country <-> zone mapping file.
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| 169 | #
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| 170 | asLines = readTzDataFile(os.path.join(sTzDataDir, 'zone.tab'));
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| 171 | iLine = 0;
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| 172 | while iLine < len(asLines):
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| 173 | sLine = asLines[iLine];
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| 174 | if sLine and sLine[0] != ' ':
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| 175 | asFields = sLine.split('\t');
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| 176 | try:
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| 177 | sTerritory = asFields[0];
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| 178 | if len(sTerritory) != 2: raise Exception('malformed country: %s' % (sTerritory,));
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| 179 | sZone = asFields[2];
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| 180 | oZone = g_dZones.get(sZone);
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| 181 | if oZone:
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| 182 | if oZone.sTerritory and oZone.sTerritory != 'ZZ':
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| 183 | raise Exception('zone %s already have country %s associated with it (setting %s)'
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| 184 | % (sZone, oZone.sTerritory, sTerritory));
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| 185 | oZone.sTerritory = sTerritory;
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| 186 | else:
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| 187 | oLink = g_dLinks.get(sZone);
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| 188 | if oLink:
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| 189 | pass; # ignore country<->link associations for now.
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| 190 | else: raise Exception('country zone not found: %s' % (sZone,));
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| 191 |
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| 192 | except Exception as oXcpt:
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| 193 | error("line %u in %s: '%s'" % (iLine + 1, 'zone.tab', type(oXcpt) if not str(oXcpt) else str(oXcpt),));
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| 194 | info("'%s'" % (asLines[iLine],));
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| 195 | return 1;
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| 196 | iLine += 1;
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| 197 | return 0
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| 198 |
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| 199 |
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| 200 | def readWindowsToTzMap(sMapXml):
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| 201 | """
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| 202 | Reads the 'common/supplemental/windowsZones.xml' file from http://cldr.unicode.org/.
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| 203 | """
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| 204 | oXmlDoc = ElementTree.parse(sMapXml);
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| 205 | oMap = oXmlDoc.getroot().find('windowsZones').find('mapTimezones');
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| 206 | # <mapZone other="Line Islands Standard Time" territory="001" type="Pacific/Kiritimati"/>
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| 207 | for oChild in oMap.findall('mapZone'):
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| 208 | sTerritory = oChild.attrib['territory'];
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| 209 | sWinZone = oChild.attrib['other'];
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| 210 | asUnixZones = oChild.attrib['type'].split();
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| 211 | for sZone in asUnixZones:
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| 212 | oZone = g_dZones.get(sZone);
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| 213 | if oZone:
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| 214 | if oZone.sWinName is None or (oZone.sWinTerritory == '001' and oZone.sWinName == sWinZone):
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| 215 | oZone.sWinName = sWinZone;
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| 216 | oZone.sWinTerritory = sTerritory;
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| 217 | if sTerritory == '001':
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| 218 | oZone.fWinGolden = True;
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| 219 | else:
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| 220 | warning('zone "%s" have more than one windows mapping: %s (%s) and now %s (%s)'
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| 221 | % (sZone, oZone.sWinName, oZone.sWinTerritory, sWinZone, sTerritory));
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| 222 | else:
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| 223 | oLink = g_dLinks.get(sZone);
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| 224 | if oLink:
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| 225 | if oLink.sWinName is None or (oLink.sWinTerritory == '001' and oLink.sWinName == sWinZone):
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| 226 | oLink.sWinName = sWinZone;
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| 227 | oLink.sWinTerritory = sTerritory;
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| 228 | if sTerritory == '001':
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| 229 | oLink.fWinGolden = True;
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| 230 | else:
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| 231 | warning('zone-link "%s" have more than one windows mapping: %s (%s) and now %s (%s)'
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| 232 | % (sZone, oLink.sWinName, oLink.sWinTerritory, sWinZone, sTerritory));
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| 233 | else:
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| 234 | warning('could not find zone "%s" (for mapping win zone "%s" to) - got the right data sets?'
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| 235 | % (sZone, sWinZone));
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| 236 | return 0;
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| 237 |
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| 238 |
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| 239 | def readWindowsIndexes(sFile):
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| 240 | """
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| 241 | Reads the windows time zone index from the table in the given file and sets idxWin.
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| 242 |
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| 243 | Assumes format: index{tab}name{tab}(GMT{offset}){space}{cities}
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| 244 |
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| 245 | For instance: https://support.microsoft.com/en-gb/help/973627/microsoft-time-zone-index-values
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| 246 | """
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| 247 | # Read the file.
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| 248 | oInFile = open(sFile, "r");
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| 249 | asLines = oInFile.readlines();
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| 250 | oInFile.close();
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| 251 |
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| 252 | # Check the header.
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| 253 | if not asLines[0].startswith('Index'):
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| 254 | error('expected first line of "%s" to start with "Index"' % (sFile,));
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| 255 | return 1;
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| 256 | fHexIndex = asLines[0].find('hex') > 0;
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| 257 | iLine = 1;
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| 258 | while iLine < len(asLines):
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| 259 | # Parse.
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| 260 | asFields = asLines[iLine].split('\t');
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| 261 | try:
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| 262 | idxWin = int(asFields[0].strip(), 16 if fHexIndex else 10);
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| 263 | sWinName = asFields[1].strip();
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| 264 | sLocations = ' '.join(asFields[2].split());
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| 265 | if sWinName.find('(GMT') >= 0: raise Exception("oops #1");
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| 266 | if not sLocations.startswith('(GMT'): raise Exception("oops #2");
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| 267 | sStdOffset = sLocations[sLocations.find('(') + 1 : sLocations.find(')')].strip().replace(' ','');
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| 268 | sLocations = sLocations[sLocations.find(')') + 1 : ].strip();
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| 269 | except Exception as oXcpt:
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| 270 | error("line %u in %s: '%s'" % (iLine + 1, sFile, type(oXcpt) if not str(oXcpt) else str(oXcpt),));
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| 271 | info("'%s'" % (asLines[iLine],));
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| 272 | return 1;
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| 273 |
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| 274 | # Some name adjustments.
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| 275 | sWinName = sWinName.lower();
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| 276 | if sWinName.startswith('a.u.s.'):
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| 277 | sWinName = 'aus' + sWinName[6:];
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| 278 | elif sWinName.startswith('u.s. '):
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| 279 | sWinName = 'us ' + sWinName[5:];
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| 280 | elif sWinName.startswith('s.a. '):
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| 281 | sWinName = 'sa ' + sWinName[5:];
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| 282 | elif sWinName.startswith('s.e. '):
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| 283 | sWinName = 'se ' + sWinName[5:];
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| 284 | elif sWinName.startswith('pacific s.a. '):
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| 285 | sWinName = 'pacific sa ' + sWinName[13:];
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| 286 |
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| 287 | # Update zone entries with matching windows names.
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| 288 | cUpdates = 0;
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| 289 | for sZone in g_dZones:
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| 290 | oZone = g_dZones[sZone];
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| 291 | if oZone.sWinName and oZone.sWinName.lower() == sWinName:
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| 292 | oZone.idxWin = idxWin;
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| 293 | cUpdates += 1;
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| 294 | #info('idxWin=%#x - %s / %s' % (idxWin, oZone.sName, oZone.sWinName,));
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| 295 | if cUpdates == 0:
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| 296 | warning('No matching zone found for index zone "%s" (%#x, %s)' % (sWinName, idxWin, sLocations));
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| 297 |
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| 298 | # Advance.
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| 299 | iLine += 1;
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| 300 | return 0;
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| 301 |
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| 302 | def getPadding(sField, cchWidth):
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| 303 | """ Returns space padding for the given field string. """
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| 304 | if len(sField) < cchWidth:
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| 305 | return ' ' * (cchWidth - len(sField));
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| 306 | return '';
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| 307 |
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| 308 | def formatFields(sName, oZone, oWinZone):
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| 309 | """ Formats the table fields. """
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| 310 |
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| 311 | # RTTIMEZONEINFO:
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| 312 | # const char *pszUnixName;
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| 313 | # const char *pszWindowsName;
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| 314 | # uint8_t cchUnixName;
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| 315 | # uint8_t cchWindowsName;
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| 316 | # char szCountry[3];
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| 317 | # char szWindowsCountry[3];
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| 318 | # uint32_t idxWindows;
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| 319 | # uint32_t uReserved;
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| 320 |
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| 321 | asFields = [ '"%s"' % sName, ];
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| 322 | if oWinZone.sWinName:
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| 323 | asFields.append('"%s"' % oWinZone.sWinName);
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| 324 | else:
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| 325 | asFields.append('NULL');
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| 326 |
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| 327 | asFields.append('%u' % (len(sName),));
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| 328 | if oWinZone.sWinName:
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| 329 | asFields.append('%u' % (len(oWinZone.sWinName),));
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| 330 | else:
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| 331 | asFields.append('0');
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| 332 |
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| 333 | asFields.append('"%s"' % (oZone.sTerritory,));
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| 334 | if oWinZone.sWinTerritory:
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| 335 | asFields.append('"%s"' % (oWinZone.sWinTerritory,));
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| 336 | else:
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| 337 | asFields.append('""');
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| 338 | asFields.append('%#010x' % (oWinZone.idxWin,));
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| 339 |
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| 340 | asFlags = [];
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| 341 | if oWinZone.fWinGolden:
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| 342 | asFlags.append('RTTIMEZONEINFO_F_GOLDEN');
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| 343 | if asFlags:
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| 344 | asFields.append(' | '.join(asFlags));
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| 345 | else:
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| 346 | asFields.append('0');
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| 347 | return asFields;
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| 348 |
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| 349 | def produceCode(oDst):
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| 350 | """
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| 351 | Produces the tables.
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| 352 | """
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| 353 |
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| 354 | #
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| 355 | # Produce the info table.
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| 356 | #
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| 357 | aasEntries = [];
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| 358 |
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| 359 | # The straight zones.
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| 360 | for sZone in g_dZones:
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| 361 | asFields = formatFields(sZone, g_dZones[sZone], g_dZones[sZone]);
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| 362 | aasEntries.append(asFields);
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| 363 |
|
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| 364 | # The links.
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| 365 | for sZone in g_dLinks:
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|---|
| 366 | oLink = g_dLinks[sZone];
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|---|
| 367 | asFields = formatFields(sZone, g_dZones[oLink.sTarget], oLink);
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|---|
| 368 | aasEntries.append(asFields);
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| 369 |
|
|---|
| 370 | # Figure field lengths.
|
|---|
| 371 | acchFields = [ 2, 2, 2, 2, 4, 4, 10, 1 ];
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|---|
| 372 | for asFields in aasEntries:
|
|---|
| 373 | assert len(asFields) == len(acchFields);
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|---|
| 374 | for iField, sField in enumerate(asFields):
|
|---|
| 375 | if len(sField) > acchFields[iField]:
|
|---|
| 376 | acchFields[iField] = len(sField);
|
|---|
| 377 |
|
|---|
| 378 | # Sort the data on zone name.
|
|---|
| 379 | aasEntries.sort();
|
|---|
| 380 |
|
|---|
| 381 | # Do the formatting.
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|---|
| 382 | oDst.write('/**\n'
|
|---|
| 383 | ' * Static time zone mapping info. Sorted by pszUnixName.\n'
|
|---|
| 384 | ' */\n'
|
|---|
| 385 | 'static const RTTIMEZONEINFO g_aTimeZones[] =\n'
|
|---|
| 386 | '{\n');
|
|---|
| 387 | for iEntry, asFields in enumerate(aasEntries):
|
|---|
| 388 | sLine = ' { ';
|
|---|
| 389 | for iField, sField in enumerate(asFields):
|
|---|
| 390 | sLine += sField;
|
|---|
| 391 | sLine += ', ';
|
|---|
| 392 | sLine += getPadding(sField, acchFields[iField]);
|
|---|
| 393 | sLine += ' }, /* %#05x */\n' % (iEntry,);
|
|---|
| 394 | oDst.write(sLine);
|
|---|
| 395 | oDst.write('};\n'
|
|---|
| 396 | '\n');
|
|---|
| 397 |
|
|---|
| 398 | #
|
|---|
| 399 | # Now produce a lookup table for windows time zone names, with indexes into
|
|---|
| 400 | # the g_aTimeZone table.
|
|---|
| 401 | #
|
|---|
| 402 | aasLookup = [];
|
|---|
| 403 | for iEntry, asFields in enumerate(aasEntries):
|
|---|
| 404 | if asFields[1] != 'NULL':
|
|---|
| 405 | aasLookup.append([ asFields[1], # sWinName
|
|---|
| 406 | -1 if asFields[7].find('RTTIMEZONEINFO_F_GOLDEN') >= 0 else 1,
|
|---|
| 407 | asFields[5], # sWinTerritory
|
|---|
| 408 | iEntry,
|
|---|
| 409 | asFields[0]]); # sZone
|
|---|
| 410 | aasLookup.sort();
|
|---|
| 411 |
|
|---|
| 412 | oDst.write('/**\n'
|
|---|
| 413 | ' * Windows time zone lookup table. Sorted by name, golden flag and territory.\n'
|
|---|
| 414 | ' */\n'
|
|---|
| 415 | 'static const uint16_t g_aidxWinTimeZones[] = \n'
|
|---|
| 416 | '{\n');
|
|---|
| 417 | for asFields in aasLookup:
|
|---|
| 418 | sLine = ' %#05x, /* %s' % (asFields[3], asFields[0][1:-1]);
|
|---|
| 419 | sLine += getPadding(asFields[0], acchFields[1]);
|
|---|
| 420 | sLine += ' / %s%s' % (asFields[2][1:-1], '+' if asFields[1] < 0 else ' ');
|
|---|
| 421 | if len(asFields[2]) == 2:
|
|---|
| 422 | sLine += ' ';
|
|---|
| 423 | sLine += ' ==> %s */\n' % (asFields[4][1:-1],)
|
|---|
| 424 | oDst.write(sLine);
|
|---|
| 425 |
|
|---|
| 426 | oDst.write('};\n'
|
|---|
| 427 | '\n');
|
|---|
| 428 |
|
|---|
| 429 | return 0;
|
|---|
| 430 |
|
|---|
| 431 |
|
|---|
| 432 | def main(asArgs):
|
|---|
| 433 | """
|
|---|
| 434 | C-like main function.
|
|---|
| 435 | """
|
|---|
| 436 | if len(asArgs) != 4:
|
|---|
| 437 | error("Takes exacty three arguments: <ms-index-file> <ms-key-file> <tz-data-dir>");
|
|---|
| 438 | return 1;
|
|---|
| 439 | sTzDataDir = asArgs[1];
|
|---|
| 440 | sWinToTzMap = asArgs[2];
|
|---|
| 441 | sWinIndexTable = asArgs[3];
|
|---|
| 442 |
|
|---|
| 443 | #
|
|---|
| 444 | # Read in the data first.
|
|---|
| 445 | #
|
|---|
| 446 | iRc = readTzData(sTzDataDir);
|
|---|
| 447 | if iRc == 0:
|
|---|
| 448 | iRc = readWindowsToTzMap(sWinToTzMap);
|
|---|
| 449 | if iRc == 0:
|
|---|
| 450 | iRc = readWindowsIndexes(sWinIndexTable);
|
|---|
| 451 | if iRc == 0:
|
|---|
| 452 | #
|
|---|
| 453 | # Produce the C table.
|
|---|
| 454 | #
|
|---|
| 455 | iRc = produceCode(sys.stdout);
|
|---|
| 456 | return iRc;
|
|---|
| 457 |
|
|---|
| 458 | if __name__ == '__main__':
|
|---|
| 459 | sys.exit(main(sys.argv));
|
|---|
| 460 |
|
|---|
