- Generated on Sun Nov 11 2012 00:00:54 for MediaWiki by
1.7.6.1
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MediaWiki
master
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00001 <?php 00032 class Exif { 00033 00034 const BYTE = 1; 00035 const ASCII = 2; 00036 const SHORT = 3; 00037 const LONG = 4; 00038 const RATIONAL = 5; 00039 const UNDEFINED = 7; 00040 const SLONG = 9; 00041 const SRATIONAL = 10; 00042 const IGNORE = -1; // A fake value for things we don't want or don't support. 00043 00045 /* @var array 00046 * @private 00047 */ 00048 00054 var $mExifTags; 00055 00059 var $mRawExifData; 00060 00066 var $mFilteredExifData; 00067 00071 var $mFormattedExifData; 00072 00074 00076 /* @var string 00077 * @private 00078 */ 00079 00083 var $file; 00084 00088 var $basename; 00089 00093 var $log = false; 00094 00099 private $byteOrder; 00101 00114 function __construct( $file, $byteOrder = '' ) { 00123 $this->mExifTags = array( 00124 # TIFF Rev. 6.0 Attribute Information (p22) 00125 'IFD0' => array( 00126 # Tags relating to image structure 00127 'ImageWidth' => Exif::SHORT.','.Exif::LONG, # Image width 00128 'ImageLength' => Exif::SHORT.','.Exif::LONG, # Image height 00129 'BitsPerSample' => array( Exif::SHORT, 3 ), # Number of bits per component 00130 # "When a primary image is JPEG compressed, this designation is not" 00131 # "necessary and is omitted." (p23) 00132 'Compression' => Exif::SHORT, # Compression scheme #p23 00133 'PhotometricInterpretation' => Exif::SHORT, # Pixel composition #p23 00134 'Orientation' => Exif::SHORT, # Orientation of image #p24 00135 'SamplesPerPixel' => Exif::SHORT, # Number of components 00136 'PlanarConfiguration' => Exif::SHORT, # Image data arrangement #p24 00137 'YCbCrSubSampling' => array( Exif::SHORT, 2), # Subsampling ratio of Y to C #p24 00138 'YCbCrPositioning' => Exif::SHORT, # Y and C positioning #p24-25 00139 'XResolution' => Exif::RATIONAL, # Image resolution in width direction 00140 'YResolution' => Exif::RATIONAL, # Image resolution in height direction 00141 'ResolutionUnit' => Exif::SHORT, # Unit of X and Y resolution #(p26) 00142 00143 # Tags relating to recording offset 00144 'StripOffsets' => Exif::SHORT.','.Exif::LONG, # Image data location 00145 'RowsPerStrip' => Exif::SHORT.','.Exif::LONG, # Number of rows per strip 00146 'StripByteCounts' => Exif::SHORT.','.Exif::LONG, # Bytes per compressed strip 00147 'JPEGInterchangeFormat' => Exif::SHORT.','.Exif::LONG, # Offset to JPEG SOI 00148 'JPEGInterchangeFormatLength' => Exif::SHORT.','.Exif::LONG, # Bytes of JPEG data 00149 00150 # Tags relating to image data characteristics 00151 'TransferFunction' => Exif::IGNORE, # Transfer function 00152 'WhitePoint' => array( Exif::RATIONAL, 2), # White point chromaticity 00153 'PrimaryChromaticities' => array( Exif::RATIONAL, 6), # Chromaticities of primarities 00154 'YCbCrCoefficients' => array( Exif::RATIONAL, 3), # Color space transformation matrix coefficients #p27 00155 'ReferenceBlackWhite' => array( Exif::RATIONAL, 6), # Pair of black and white reference values 00156 00157 # Other tags 00158 'DateTime' => Exif::ASCII, # File change date and time 00159 'ImageDescription' => Exif::ASCII, # Image title 00160 'Make' => Exif::ASCII, # Image input equipment manufacturer 00161 'Model' => Exif::ASCII, # Image input equipment model 00162 'Software' => Exif::ASCII, # Software used 00163 'Artist' => Exif::ASCII, # Person who created the image 00164 'Copyright' => Exif::ASCII, # Copyright holder 00165 ), 00166 00167 # Exif IFD Attribute Information (p30-31) 00168 'EXIF' => array( 00169 # TODO: NOTE: Nonexistence of this field is taken to mean nonconformance 00170 # to the EXIF 2.1 AND 2.2 standards 00171 'ExifVersion' => Exif::UNDEFINED, # Exif version 00172 'FlashPixVersion' => Exif::UNDEFINED, # Supported Flashpix version #p32 00173 00174 # Tags relating to Image Data Characteristics 00175 'ColorSpace' => Exif::SHORT, # Color space information #p32 00176 00177 # Tags relating to image configuration 00178 'ComponentsConfiguration' => Exif::UNDEFINED, # Meaning of each component #p33 00179 'CompressedBitsPerPixel' => Exif::RATIONAL, # Image compression mode 00180 'PixelYDimension' => Exif::SHORT.','.Exif::LONG, # Valid image width 00181 'PixelXDimension' => Exif::SHORT.','.Exif::LONG, # Valid image height 00182 00183 # Tags relating to related user information 00184 'MakerNote' => Exif::IGNORE, # Manufacturer notes 00185 'UserComment' => Exif::UNDEFINED, # User comments #p34 00186 00187 # Tags relating to related file information 00188 'RelatedSoundFile' => Exif::ASCII, # Related audio file 00189 00190 # Tags relating to date and time 00191 'DateTimeOriginal' => Exif::ASCII, # Date and time of original data generation #p36 00192 'DateTimeDigitized' => Exif::ASCII, # Date and time of original data generation 00193 'SubSecTime' => Exif::ASCII, # DateTime subseconds 00194 'SubSecTimeOriginal' => Exif::ASCII, # DateTimeOriginal subseconds 00195 'SubSecTimeDigitized' => Exif::ASCII, # DateTimeDigitized subseconds 00196 00197 # Tags relating to picture-taking conditions (p31) 00198 'ExposureTime' => Exif::RATIONAL, # Exposure time 00199 'FNumber' => Exif::RATIONAL, # F Number 00200 'ExposureProgram' => Exif::SHORT, # Exposure Program #p38 00201 'SpectralSensitivity' => Exif::ASCII, # Spectral sensitivity 00202 'ISOSpeedRatings' => Exif::SHORT, # ISO speed rating 00203 'OECF' => Exif::IGNORE, 00204 # Optoelectronic conversion factor. Note: We don't have support for this atm. 00205 'ShutterSpeedValue' => Exif::SRATIONAL, # Shutter speed 00206 'ApertureValue' => Exif::RATIONAL, # Aperture 00207 'BrightnessValue' => Exif::SRATIONAL, # Brightness 00208 'ExposureBiasValue' => Exif::SRATIONAL, # Exposure bias 00209 'MaxApertureValue' => Exif::RATIONAL, # Maximum land aperture 00210 'SubjectDistance' => Exif::RATIONAL, # Subject distance 00211 'MeteringMode' => Exif::SHORT, # Metering mode #p40 00212 'LightSource' => Exif::SHORT, # Light source #p40-41 00213 'Flash' => Exif::SHORT, # Flash #p41-42 00214 'FocalLength' => Exif::RATIONAL, # Lens focal length 00215 'SubjectArea' => array( Exif::SHORT, 4 ), # Subject area 00216 'FlashEnergy' => Exif::RATIONAL, # Flash energy 00217 'SpatialFrequencyResponse' => Exif::IGNORE, # Spatial frequency response. Not supported atm. 00218 'FocalPlaneXResolution' => Exif::RATIONAL, # Focal plane X resolution 00219 'FocalPlaneYResolution' => Exif::RATIONAL, # Focal plane Y resolution 00220 'FocalPlaneResolutionUnit' => Exif::SHORT, # Focal plane resolution unit #p46 00221 'SubjectLocation' => array( Exif::SHORT, 2), # Subject location 00222 'ExposureIndex' => Exif::RATIONAL, # Exposure index 00223 'SensingMethod' => Exif::SHORT, # Sensing method #p46 00224 'FileSource' => Exif::UNDEFINED, # File source #p47 00225 'SceneType' => Exif::UNDEFINED, # Scene type #p47 00226 'CFAPattern' => Exif::IGNORE, # CFA pattern. not supported atm. 00227 'CustomRendered' => Exif::SHORT, # Custom image processing #p48 00228 'ExposureMode' => Exif::SHORT, # Exposure mode #p48 00229 'WhiteBalance' => Exif::SHORT, # White Balance #p49 00230 'DigitalZoomRatio' => Exif::RATIONAL, # Digital zoom ration 00231 'FocalLengthIn35mmFilm' => Exif::SHORT, # Focal length in 35 mm film 00232 'SceneCaptureType' => Exif::SHORT, # Scene capture type #p49 00233 'GainControl' => Exif::SHORT, # Scene control #p49-50 00234 'Contrast' => Exif::SHORT, # Contrast #p50 00235 'Saturation' => Exif::SHORT, # Saturation #p50 00236 'Sharpness' => Exif::SHORT, # Sharpness #p50 00237 'DeviceSettingDescription' => Exif::IGNORE, 00238 # Device settings description. This could maybe be supported. Need to find an 00239 # example file that uses this to see if it has stuff of interest in it. 00240 'SubjectDistanceRange' => Exif::SHORT, # Subject distance range #p51 00241 00242 'ImageUniqueID' => Exif::ASCII, # Unique image ID 00243 ), 00244 00245 # GPS Attribute Information (p52) 00246 'GPS' => array( 00247 'GPSVersion' => Exif::UNDEFINED, 00248 # Should be an array of 4 Exif::BYTE's. However php treats it as an undefined 00249 # Note exif standard calls this GPSVersionID, but php doesn't like the id suffix 00250 'GPSLatitudeRef' => Exif::ASCII, # North or South Latitude #p52-53 00251 'GPSLatitude' => array( Exif::RATIONAL, 3 ), # Latitude 00252 'GPSLongitudeRef' => Exif::ASCII, # East or West Longitude #p53 00253 'GPSLongitude' => array( Exif::RATIONAL, 3), # Longitude 00254 'GPSAltitudeRef' => Exif::UNDEFINED, 00255 # Altitude reference. Note, the exif standard says this should be an EXIF::Byte, 00256 # but php seems to disagree. 00257 'GPSAltitude' => Exif::RATIONAL, # Altitude 00258 'GPSTimeStamp' => array( Exif::RATIONAL, 3), # GPS time (atomic clock) 00259 'GPSSatellites' => Exif::ASCII, # Satellites used for measurement 00260 'GPSStatus' => Exif::ASCII, # Receiver status #p54 00261 'GPSMeasureMode' => Exif::ASCII, # Measurement mode #p54-55 00262 'GPSDOP' => Exif::RATIONAL, # Measurement precision 00263 'GPSSpeedRef' => Exif::ASCII, # Speed unit #p55 00264 'GPSSpeed' => Exif::RATIONAL, # Speed of GPS receiver 00265 'GPSTrackRef' => Exif::ASCII, # Reference for direction of movement #p55 00266 'GPSTrack' => Exif::RATIONAL, # Direction of movement 00267 'GPSImgDirectionRef' => Exif::ASCII, # Reference for direction of image #p56 00268 'GPSImgDirection' => Exif::RATIONAL, # Direction of image 00269 'GPSMapDatum' => Exif::ASCII, # Geodetic survey data used 00270 'GPSDestLatitudeRef' => Exif::ASCII, # Reference for latitude of destination #p56 00271 'GPSDestLatitude' => array( Exif::RATIONAL, 3 ), # Latitude destination 00272 'GPSDestLongitudeRef' => Exif::ASCII, # Reference for longitude of destination #p57 00273 'GPSDestLongitude' => array( Exif::RATIONAL, 3 ), # Longitude of destination 00274 'GPSDestBearingRef' => Exif::ASCII, # Reference for bearing of destination #p57 00275 'GPSDestBearing' => Exif::RATIONAL, # Bearing of destination 00276 'GPSDestDistanceRef' => Exif::ASCII, # Reference for distance to destination #p57-58 00277 'GPSDestDistance' => Exif::RATIONAL, # Distance to destination 00278 'GPSProcessingMethod' => Exif::UNDEFINED, # Name of GPS processing method 00279 'GPSAreaInformation' => Exif::UNDEFINED, # Name of GPS area 00280 'GPSDateStamp' => Exif::ASCII, # GPS date 00281 'GPSDifferential' => Exif::SHORT, # GPS differential correction 00282 ), 00283 ); 00284 00285 $this->file = $file; 00286 $this->basename = wfBaseName( $this->file ); 00287 if ( $byteOrder === 'BE' || $byteOrder === 'LE' ) { 00288 $this->byteOrder = $byteOrder; 00289 } else { 00290 // Only give a warning for b/c, since originally we didn't 00291 // require this. The number of things affected by this is 00292 // rather small. 00293 wfWarn( 'Exif class did not have byte order specified. ' 00294 . 'Some properties may be decoded incorrectly.' ); 00295 $this->byteOrder = 'BE'; // BE seems about twice as popular as LE in jpg's. 00296 } 00297 00298 $this->debugFile( $this->basename, __FUNCTION__, true ); 00299 if( function_exists( 'exif_read_data' ) ) { 00300 wfSuppressWarnings(); 00301 $data = exif_read_data( $this->file, 0, true ); 00302 wfRestoreWarnings(); 00303 } else { 00304 throw new MWException( "Internal error: exif_read_data not present. \$wgShowEXIF may be incorrectly set or not checked by an extension." ); 00305 } 00311 $this->mRawExifData = $data ? $data : array(); 00312 $this->makeFilteredData(); 00313 $this->collapseData(); 00314 $this->debugFile( __FUNCTION__, false ); 00315 } 00316 00320 function makeFilteredData() { 00321 $this->mFilteredExifData = Array(); 00322 00323 foreach ( array_keys( $this->mRawExifData ) as $section ) { 00324 if ( !in_array( $section, array_keys( $this->mExifTags ) ) ) { 00325 $this->debug( $section , __FUNCTION__, "'$section' is not a valid Exif section" ); 00326 continue; 00327 } 00328 00329 foreach ( array_keys( $this->mRawExifData[$section] ) as $tag ) { 00330 if ( !in_array( $tag, array_keys( $this->mExifTags[$section] ) ) ) { 00331 $this->debug( $tag, __FUNCTION__, "'$tag' is not a valid tag in '$section'" ); 00332 continue; 00333 } 00334 00335 $this->mFilteredExifData[$tag] = $this->mRawExifData[$section][$tag]; 00336 // This is ok, as the tags in the different sections do not conflict. 00337 // except in computed and thumbnail section, which we don't use. 00338 00339 $value = $this->mRawExifData[$section][$tag]; 00340 if ( !$this->validate( $section, $tag, $value ) ) { 00341 $this->debug( $value, __FUNCTION__, "'$tag' contained invalid data" ); 00342 unset( $this->mFilteredExifData[$tag] ); 00343 } 00344 } 00345 } 00346 } 00347 00366 function collapseData( ) { 00367 00368 $this->exifGPStoNumber( 'GPSLatitude' ); 00369 $this->exifGPStoNumber( 'GPSDestLatitude' ); 00370 $this->exifGPStoNumber( 'GPSLongitude' ); 00371 $this->exifGPStoNumber( 'GPSDestLongitude' ); 00372 00373 if ( isset( $this->mFilteredExifData['GPSAltitude'] ) && isset( $this->mFilteredExifData['GPSAltitudeRef'] ) ) { 00374 00375 // We know altitude data is a <num>/<denom> from the validation functions ran earlier. 00376 // But multiplying such a string by -1 doesn't work well, so convert. 00377 list( $num, $denom ) = explode( '/', $this->mFilteredExifData['GPSAltitude'] ); 00378 $this->mFilteredExifData['GPSAltitude'] = $num / $denom; 00379 00380 if ( $this->mFilteredExifData['GPSAltitudeRef'] === "\1" ) { 00381 $this->mFilteredExifData['GPSAltitude'] *= - 1; 00382 } 00383 unset( $this->mFilteredExifData['GPSAltitudeRef'] ); 00384 } 00385 00386 $this->exifPropToOrd( 'FileSource' ); 00387 $this->exifPropToOrd( 'SceneType' ); 00388 00389 $this->charCodeString( 'UserComment' ); 00390 $this->charCodeString( 'GPSProcessingMethod'); 00391 $this->charCodeString( 'GPSAreaInformation' ); 00392 00393 //ComponentsConfiguration should really be an array instead of a string... 00394 //This turns a string of binary numbers into an array of numbers. 00395 00396 if ( isset ( $this->mFilteredExifData['ComponentsConfiguration'] ) ) { 00397 $val = $this->mFilteredExifData['ComponentsConfiguration']; 00398 $ccVals = array(); 00399 for ($i = 0; $i < strlen($val); $i++) { 00400 $ccVals[$i] = ord( substr($val, $i, 1) ); 00401 } 00402 $ccVals['_type'] = 'ol'; //this is for formatting later. 00403 $this->mFilteredExifData['ComponentsConfiguration'] = $ccVals; 00404 } 00405 00406 //GPSVersion(ID) is treated as the wrong type by php exif support. 00407 //Go through each byte turning it into a version string. 00408 //For example: "\x02\x02\x00\x00" -> "2.2.0.0" 00409 00410 //Also change exif tag name from GPSVersion (what php exif thinks it is) 00411 //to GPSVersionID (what the exif standard thinks it is). 00412 00413 if ( isset ( $this->mFilteredExifData['GPSVersion'] ) ) { 00414 $val = $this->mFilteredExifData['GPSVersion']; 00415 $newVal = ''; 00416 for ($i = 0; $i < strlen($val); $i++) { 00417 if ( $i !== 0 ) { 00418 $newVal .= '.'; 00419 } 00420 $newVal .= ord( substr($val, $i, 1) ); 00421 } 00422 if ( $this->byteOrder === 'LE' ) { 00423 // Need to reverse the string 00424 $newVal2 = ''; 00425 for ( $i = strlen( $newVal ) - 1; $i >= 0; $i-- ) { 00426 $newVal2 .= substr( $newVal, $i, 1 ); 00427 } 00428 $this->mFilteredExifData['GPSVersionID'] = $newVal2; 00429 } else { 00430 $this->mFilteredExifData['GPSVersionID'] = $newVal; 00431 } 00432 unset( $this->mFilteredExifData['GPSVersion'] ); 00433 } 00434 00435 } 00442 private function charCodeString ( $prop ) { 00443 if ( isset( $this->mFilteredExifData[$prop] ) ) { 00444 00445 if ( strlen($this->mFilteredExifData[$prop]) <= 8 ) { 00446 //invalid. Must be at least 9 bytes long. 00447 00448 $this->debug( $this->mFilteredExifData[$prop] , __FUNCTION__, false ); 00449 unset($this->mFilteredExifData[$prop]); 00450 return; 00451 } 00452 $charCode = substr( $this->mFilteredExifData[$prop], 0, 8); 00453 $val = substr( $this->mFilteredExifData[$prop], 8); 00454 00455 switch ($charCode) { 00456 case "\x4A\x49\x53\x00\x00\x00\x00\x00": 00457 //JIS 00458 $charset = "Shift-JIS"; 00459 break; 00460 case "UNICODE\x00": 00461 $charset = "UTF-16" . $this->byteOrder; 00462 break; 00463 default: //ascii or undefined. 00464 $charset = ""; 00465 break; 00466 } 00467 // This could possibly check to see if iconv is really installed 00468 // or if we're using the compatibility wrapper in globalFunctions.php 00469 if ($charset) { 00470 wfSuppressWarnings(); 00471 $val = iconv($charset, 'UTF-8//IGNORE', $val); 00472 wfRestoreWarnings(); 00473 } else { 00474 // if valid utf-8, assume that, otherwise assume windows-1252 00475 $valCopy = $val; 00476 UtfNormal::quickIsNFCVerify( $valCopy ); //validates $valCopy. 00477 if ( $valCopy !== $val ) { 00478 wfSuppressWarnings(); 00479 $val = iconv('Windows-1252', 'UTF-8//IGNORE', $val); 00480 wfRestoreWarnings(); 00481 } 00482 } 00483 00484 //trim and check to make sure not only whitespace. 00485 $val = trim($val); 00486 if ( strlen( $val ) === 0 ) { 00487 //only whitespace. 00488 $this->debug( $this->mFilteredExifData[$prop] , __FUNCTION__, "$prop: Is only whitespace" ); 00489 unset($this->mFilteredExifData[$prop]); 00490 return; 00491 } 00492 00493 //all's good. 00494 $this->mFilteredExifData[$prop] = $val; 00495 } 00496 } 00503 private function exifPropToOrd ( $prop ) { 00504 if ( isset( $this->mFilteredExifData[$prop] ) ) { 00505 $this->mFilteredExifData[$prop] = ord( $this->mFilteredExifData[$prop] ); 00506 } 00507 } 00513 private function exifGPStoNumber ( $prop ) { 00514 $loc =& $this->mFilteredExifData[$prop]; 00515 $dir =& $this->mFilteredExifData[$prop . 'Ref']; 00516 $res = false; 00517 00518 if ( isset( $loc ) && isset( $dir ) && ( $dir === 'N' || $dir === 'S' || $dir === 'E' || $dir === 'W' ) ) { 00519 list( $num, $denom ) = explode( '/', $loc[0] ); 00520 $res = $num / $denom; 00521 list( $num, $denom ) = explode( '/', $loc[1] ); 00522 $res += ( $num / $denom ) * ( 1 / 60 ); 00523 list( $num, $denom ) = explode( '/', $loc[2] ); 00524 $res += ( $num / $denom ) * ( 1 / 3600 ); 00525 00526 if ( $dir === 'S' || $dir === 'W' ) { 00527 $res *= - 1; // make negative 00528 } 00529 } 00530 00531 // update the exif records. 00532 00533 if ( $res !== false ) { // using !== as $res could potentially be 0 00534 $this->mFilteredExifData[$prop] = $res; 00535 unset( $this->mFilteredExifData[$prop . 'Ref'] ); 00536 } else { // if invalid 00537 unset( $this->mFilteredExifData[$prop] ); 00538 unset( $this->mFilteredExifData[$prop . 'Ref'] ); 00539 } 00540 } 00541 00548 function makeFormattedData( ) { 00549 wfDeprecated( __METHOD__, '1.18' ); 00550 $this->mFormattedExifData = FormatMetadata::getFormattedData( 00551 $this->mFilteredExifData ); 00552 } 00562 function getData() { 00563 return $this->mRawExifData; 00564 } 00565 00569 function getFilteredData() { 00570 return $this->mFilteredExifData; 00571 } 00572 00581 function getFormattedData() { 00582 wfDeprecated( __METHOD__, '1.18' ); 00583 if (!$this->mFormattedExifData) { 00584 $this->makeFormattedData(); 00585 } 00586 return $this->mFormattedExifData; 00587 } 00602 public static function version() { 00603 return 2; // We don't need no bloddy constants! 00604 } 00605 00614 private function isByte( $in ) { 00615 if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 255 ) { 00616 $this->debug( $in, __FUNCTION__, true ); 00617 return true; 00618 } else { 00619 $this->debug( $in, __FUNCTION__, false ); 00620 return false; 00621 } 00622 } 00623 00628 private function isASCII( $in ) { 00629 if ( is_array( $in ) ) { 00630 return false; 00631 } 00632 00633 if ( preg_match( "/[^\x0a\x20-\x7e]/", $in ) ) { 00634 $this->debug( $in, __FUNCTION__, 'found a character not in our whitelist' ); 00635 return false; 00636 } 00637 00638 if ( preg_match( '/^\s*$/', $in ) ) { 00639 $this->debug( $in, __FUNCTION__, 'input consisted solely of whitespace' ); 00640 return false; 00641 } 00642 00643 return true; 00644 } 00645 00650 private function isShort( $in ) { 00651 if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 65536 ) { 00652 $this->debug( $in, __FUNCTION__, true ); 00653 return true; 00654 } else { 00655 $this->debug( $in, __FUNCTION__, false ); 00656 return false; 00657 } 00658 } 00659 00664 private function isLong( $in ) { 00665 if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 4294967296 ) { 00666 $this->debug( $in, __FUNCTION__, true ); 00667 return true; 00668 } else { 00669 $this->debug( $in, __FUNCTION__, false ); 00670 return false; 00671 } 00672 } 00673 00678 private function isRational( $in ) { 00679 $m = array(); 00680 if ( !is_array( $in ) && @preg_match( '/^(\d+)\/(\d+[1-9]|[1-9]\d*)$/', $in, $m ) ) { # Avoid division by zero 00681 return $this->isLong( $m[1] ) && $this->isLong( $m[2] ); 00682 } else { 00683 $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' ); 00684 return false; 00685 } 00686 } 00687 00692 private function isUndefined( $in ) { 00693 $this->debug( $in, __FUNCTION__, true ); 00694 return true; 00695 } 00696 00701 private function isSlong( $in ) { 00702 if ( $this->isLong( abs( $in ) ) ) { 00703 $this->debug( $in, __FUNCTION__, true ); 00704 return true; 00705 } else { 00706 $this->debug( $in, __FUNCTION__, false ); 00707 return false; 00708 } 00709 } 00710 00715 private function isSrational( $in ) { 00716 $m = array(); 00717 if ( !is_array( $in ) && preg_match( '/^(-?\d+)\/(\d+[1-9]|[1-9]\d*)$/', $in, $m ) ) { # Avoid division by zero 00718 return $this->isSlong( $m[0] ) && $this->isSlong( $m[1] ); 00719 } else { 00720 $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' ); 00721 return false; 00722 } 00723 } 00736 private function validate( $section, $tag, $val, $recursive = false ) { 00737 $debug = "tag is '$tag'"; 00738 $etype = $this->mExifTags[$section][$tag]; 00739 $ecount = 1; 00740 if( is_array( $etype ) ) { 00741 list( $etype, $ecount ) = $etype; 00742 if ( $recursive ) 00743 $ecount = 1; // checking individual elements 00744 } 00745 $count = count( $val ); 00746 if( $ecount != $count ) { 00747 $this->debug( $val, __FUNCTION__, "Expected $ecount elements for $tag but got $count" ); 00748 return false; 00749 } 00750 if( $count > 1 ) { 00751 foreach( $val as $v ) { 00752 if( !$this->validate( $section, $tag, $v, true ) ) { 00753 return false; 00754 } 00755 } 00756 return true; 00757 } 00758 // Does not work if not typecast 00759 switch( (string)$etype ) { 00760 case (string)Exif::BYTE: 00761 $this->debug( $val, __FUNCTION__, $debug ); 00762 return $this->isByte( $val ); 00763 case (string)Exif::ASCII: 00764 $this->debug( $val, __FUNCTION__, $debug ); 00765 return $this->isASCII( $val ); 00766 case (string)Exif::SHORT: 00767 $this->debug( $val, __FUNCTION__, $debug ); 00768 return $this->isShort( $val ); 00769 case (string)Exif::LONG: 00770 $this->debug( $val, __FUNCTION__, $debug ); 00771 return $this->isLong( $val ); 00772 case (string)Exif::RATIONAL: 00773 $this->debug( $val, __FUNCTION__, $debug ); 00774 return $this->isRational( $val ); 00775 case (string)Exif::UNDEFINED: 00776 $this->debug( $val, __FUNCTION__, $debug ); 00777 return $this->isUndefined( $val ); 00778 case (string)Exif::SLONG: 00779 $this->debug( $val, __FUNCTION__, $debug ); 00780 return $this->isSlong( $val ); 00781 case (string)Exif::SRATIONAL: 00782 $this->debug( $val, __FUNCTION__, $debug ); 00783 return $this->isSrational( $val ); 00784 case (string)Exif::SHORT.','.Exif::LONG: 00785 $this->debug( $val, __FUNCTION__, $debug ); 00786 return $this->isShort( $val ) || $this->isLong( $val ); 00787 case (string)Exif::IGNORE: 00788 $this->debug( $val, __FUNCTION__, $debug ); 00789 return false; 00790 default: 00791 $this->debug( $val, __FUNCTION__, "The tag '$tag' is unknown" ); 00792 return false; 00793 } 00794 } 00795 00805 private function debug( $in, $fname, $action = null ) { 00806 if ( !$this->log ) { 00807 return; 00808 } 00809 $type = gettype( $in ); 00810 $class = ucfirst( __CLASS__ ); 00811 if ( $type === 'array' ) { 00812 $in = print_r( $in, true ); 00813 } 00814 00815 if ( $action === true ) { 00816 wfDebugLog( $this->log, "$class::$fname: accepted: '$in' (type: $type)\n"); 00817 } elseif ( $action === false ) { 00818 wfDebugLog( $this->log, "$class::$fname: rejected: '$in' (type: $type)\n"); 00819 } elseif ( $action === null ) { 00820 wfDebugLog( $this->log, "$class::$fname: input was: '$in' (type: $type)\n"); 00821 } else { 00822 wfDebugLog( $this->log, "$class::$fname: $action (type: $type; content: '$in')\n"); 00823 } 00824 } 00825 00834 private function debugFile( $fname, $io ) { 00835 if ( !$this->log ) { 00836 return; 00837 } 00838 $class = ucfirst( __CLASS__ ); 00839 if ( $io ) { 00840 wfDebugLog( $this->log, "$class::$fname: begin processing: '{$this->basename}'\n" ); 00841 } else { 00842 wfDebugLog( $this->log, "$class::$fname: end processing: '{$this->basename}'\n" ); 00843 } 00844 } 00845 } 00846
1.7.6.1