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<?php
function readZoneTab( string $tabFile ) : array
{
$tab = [];
// process extra info
$f = file( 'code/zone.tab' );
foreach ( $f as $line )
{
$line = trim( $line );
$comments = '';
if ( strlen( $line ) < 5 || $line[0] == '#' )
{
continue;
}
$fields = explode( "\t", $line );
list( $countryCode, $coordinates, $tzid ) = $fields;
if ( sizeof( $fields ) > 3 ) {
$comments = $fields[3];
}
// format lang/lat
if ( strlen( $coordinates ) == 11 )
{
sscanf( $coordinates, '%c%2d%2d%c%3d%2d', $xSign, $xH, $xM, $ySign, $yH, $yM );
$xS = $yS = 0;
}
else
{
sscanf( $coordinates, '%c%2d%2d%2d%c%3d%2d%2d', $xSign, $xH, $xM, $xS, $ySign, $yH, $yM, $yS );
}
$lat = $xH + ( $xM / 60 ) + ( $xS / 3600 );
$long = $yH + ( $yM / 60 ) + ( $yS / 3600 );
$lat = $xSign == '+' ? $lat : -$lat;
$long = $ySign == '+' ? $long : -$long;
$tab[$tzid] = [
'cc' => $countryCode,
'lat' => ($lat + 90) * 100000,
'lng' => ($long + 180) * 100000,
'desc' => $comments ?: '',
];
}
return $tab;
}
function readDataFile( string $tzid, array $tab ) : array
{
$originalHeaderSize = 20;
// obtain data from tz files
$fatData = file_get_contents( "code/data/{$tzid}", false, NULL, $originalHeaderSize );
$slimData = file_get_contents( "code/data-slim/{$tzid}", false, NULL, $originalHeaderSize );
$tabData = array_key_exists( $tzid, $tab ) ? $tab[$tzid] : null;
if ( $tabData ) {
$header = pack( 'a4ca2a13', 'PHP2', true, $tabData['cc'], '' );
$footer = pack( 'NNNa*', $tabData['lat'], $tabData['lng'], strlen( $tabData['desc'] ), $tabData['desc'] );
} else {
$header = pack( 'a4ca2a13', 'PHP2', $tzid == 'UTC', '??', '' );
$footer = pack( 'NNNa*', 0, 0, 0, '' );
}
$fatData = $header . $fatData . $footer;
$slimData = $header . $slimData . $footer;
return [ $fatData, $slimData ];
}
function createDataAndIndex(array $tab)
{
$files = array_merge(glob("code/data/*"), glob("code/data/*/*"), glob("code/data/*/*/*"));
usort($files, 'strcasecmp');
$fatIndex = [];
$slimIndex = [];
$fatData = $slimData = '';
foreach ($files as $fileName) {
if (is_dir($fileName)) {
continue;
}
$tzid = preg_replace('@code/data/@', '', $fileName);
list($tzFatData, $tzSlimData) = readDataFile($tzid, $tab);
$fatIndex[$tzid] = strlen($fatData);
$slimIndex[$tzid] = strlen($slimData);
$fatData .= $tzFatData;
$slimData .= $tzSlimData;
}
return [$fatIndex, $fatData, $slimIndex, $slimData];
}
function getVersion() : string
{
$version_info = file( 'version-info.txt' );
$version = trim( $version_info[1] );
return $version;
}
function addData(array $index, string $data)
{
$elements = count( $index );
$flipIndex = array_flip( $index );
$dataSize = strlen( $data );
$str = "const timelib_tzdb_index_entry timezonedb_idx_builtin[$elements] = {\n";
foreach ( $index as $tzid => $start )
{
$str .= sprintf( "\t{ %-36s, 0x%06X },\n", "\"{$tzid}\"", $start );
}
$str .= "};\n";
$pos = 0;
$str .= "\n\nconst unsigned char timelib_timezone_db_data_builtin[{$dataSize}] = {";
for ( $i = 0; $i < $dataSize; $i++ )
{
if ( isset( $flipIndex[$i] ) )
{
$str .= "\n\n/* {$flipIndex[$i] } */\n";
$pos = 0;
}
$str .= sprintf( "0x%02X,", ord( $data[$i] ) );
if ( $pos % 16 == 15) {
$str .= "\n";
} else {
$str .= " ";
}
$pos++;
}
$str .= "\n};\n";
return $str;
}
function writeTimelibH(array $fatIndex, string $fatData, array $slimIndex, string $slimData )
{
$elements = count( $fatIndex );
$data = "/* This is a generated file, do not modify */\n";
/* Error out if TIMELIB_SUPPORTS_V2DATA isn't set */
$data .= "#ifndef TIMELIB_SUPPORTS_V2DATA\n";
$data .= "#error Your version of timelib does not understand the timzonedb data format, please upgrade\n";
$data .= "#endif\n\n";
$data .= "#ifdef TIMELIB_SUPPORT_SLIM_FILE\n";
$data .= addData( $slimIndex, $slimData );
$data .= "#else\n";
$data .= addData( $fatIndex, $fatData );
$data .= "#endif\n\n";
$version = getVersion();
$data .= "const timelib_tzdb timezonedb_builtin = { \"{$version}\", {$elements}, timezonedb_idx_builtin, timelib_timezone_db_data_builtin };\n";
file_put_contents( 'timezonedb.h', $data );
}
$tab = readZoneTab( 'code/zone.tab' );
list( $fatIndex, $fatData, $slimIndex, $slimData ) = createDataAndIndex( $tab );
writeTimelibH( $fatIndex, $fatData, $slimIndex, $slimData );
?>
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