- Generated on Wed Oct 1 2014 21:36:27 for MediaWiki by
1.7.6.1
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MediaWiki
REL1_19
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00001 <?php 00030 class Exif { 00031 00032 const BYTE = 1; 00033 const ASCII = 2; 00034 const SHORT = 3; 00035 const LONG = 4; 00036 const RATIONAL = 5; 00037 const UNDEFINED = 7; 00038 const SLONG = 9; 00039 const SRATIONAL = 10; 00040 const IGNORE = -1; // A fake value for things we don't want or don't support. 00041 00043 /* @var array 00044 * @private 00045 */ 00046 00052 var $mExifTags; 00053 00057 var $mRawExifData; 00058 00064 var $mFilteredExifData; 00065 00069 var $mFormattedExifData; 00070 00072 00074 /* @var string 00075 * @private 00076 */ 00077 00081 var $file; 00082 00086 var $basename; 00087 00091 var $log = false; 00092 00097 private $byteOrder; 00099 00111 function __construct( $file, $byteOrder = '' ) { 00120 $this->mExifTags = array( 00121 # TIFF Rev. 6.0 Attribute Information (p22) 00122 'IFD0' => array( 00123 # Tags relating to image structure 00124 'ImageWidth' => Exif::SHORT.','.Exif::LONG, # Image width 00125 'ImageLength' => Exif::SHORT.','.Exif::LONG, # Image height 00126 'BitsPerSample' => array( Exif::SHORT, 3 ), # Number of bits per component 00127 # "When a primary image is JPEG compressed, this designation is not" 00128 # "necessary and is omitted." (p23) 00129 'Compression' => Exif::SHORT, # Compression scheme #p23 00130 'PhotometricInterpretation' => Exif::SHORT, # Pixel composition #p23 00131 'Orientation' => Exif::SHORT, # Orientation of image #p24 00132 'SamplesPerPixel' => Exif::SHORT, # Number of components 00133 'PlanarConfiguration' => Exif::SHORT, # Image data arrangement #p24 00134 'YCbCrSubSampling' => array( Exif::SHORT, 2), # Subsampling ratio of Y to C #p24 00135 'YCbCrPositioning' => Exif::SHORT, # Y and C positioning #p24-25 00136 'XResolution' => Exif::RATIONAL, # Image resolution in width direction 00137 'YResolution' => Exif::RATIONAL, # Image resolution in height direction 00138 'ResolutionUnit' => Exif::SHORT, # Unit of X and Y resolution #(p26) 00139 00140 # Tags relating to recording offset 00141 'StripOffsets' => Exif::SHORT.','.Exif::LONG, # Image data location 00142 'RowsPerStrip' => Exif::SHORT.','.Exif::LONG, # Number of rows per strip 00143 'StripByteCounts' => Exif::SHORT.','.Exif::LONG, # Bytes per compressed strip 00144 'JPEGInterchangeFormat' => Exif::SHORT.','.Exif::LONG, # Offset to JPEG SOI 00145 'JPEGInterchangeFormatLength' => Exif::SHORT.','.Exif::LONG, # Bytes of JPEG data 00146 00147 # Tags relating to image data characteristics 00148 'TransferFunction' => Exif::IGNORE, # Transfer function 00149 'WhitePoint' => array( Exif::RATIONAL, 2), # White point chromaticity 00150 'PrimaryChromaticities' => array( Exif::RATIONAL, 6), # Chromaticities of primarities 00151 'YCbCrCoefficients' => array( Exif::RATIONAL, 3), # Color space transformation matrix coefficients #p27 00152 'ReferenceBlackWhite' => array( Exif::RATIONAL, 6), # Pair of black and white reference values 00153 00154 # Other tags 00155 'DateTime' => Exif::ASCII, # File change date and time 00156 'ImageDescription' => Exif::ASCII, # Image title 00157 'Make' => Exif::ASCII, # Image input equipment manufacturer 00158 'Model' => Exif::ASCII, # Image input equipment model 00159 'Software' => Exif::ASCII, # Software used 00160 'Artist' => Exif::ASCII, # Person who created the image 00161 'Copyright' => Exif::ASCII, # Copyright holder 00162 ), 00163 00164 # Exif IFD Attribute Information (p30-31) 00165 'EXIF' => array( 00166 # TODO: NOTE: Nonexistence of this field is taken to mean nonconformance 00167 # to the EXIF 2.1 AND 2.2 standards 00168 'ExifVersion' => Exif::UNDEFINED, # Exif version 00169 'FlashPixVersion' => Exif::UNDEFINED, # Supported Flashpix version #p32 00170 00171 # Tags relating to Image Data Characteristics 00172 'ColorSpace' => Exif::SHORT, # Color space information #p32 00173 00174 # Tags relating to image configuration 00175 'ComponentsConfiguration' => Exif::UNDEFINED, # Meaning of each component #p33 00176 'CompressedBitsPerPixel' => Exif::RATIONAL, # Image compression mode 00177 'PixelYDimension' => Exif::SHORT.','.Exif::LONG, # Valid image width 00178 'PixelXDimension' => Exif::SHORT.','.Exif::LONG, # Valid image height 00179 00180 # Tags relating to related user information 00181 'MakerNote' => Exif::IGNORE, # Manufacturer notes 00182 'UserComment' => Exif::UNDEFINED, # User comments #p34 00183 00184 # Tags relating to related file information 00185 'RelatedSoundFile' => Exif::ASCII, # Related audio file 00186 00187 # Tags relating to date and time 00188 'DateTimeOriginal' => Exif::ASCII, # Date and time of original data generation #p36 00189 'DateTimeDigitized' => Exif::ASCII, # Date and time of original data generation 00190 'SubSecTime' => Exif::ASCII, # DateTime subseconds 00191 'SubSecTimeOriginal' => Exif::ASCII, # DateTimeOriginal subseconds 00192 'SubSecTimeDigitized' => Exif::ASCII, # DateTimeDigitized subseconds 00193 00194 # Tags relating to picture-taking conditions (p31) 00195 'ExposureTime' => Exif::RATIONAL, # Exposure time 00196 'FNumber' => Exif::RATIONAL, # F Number 00197 'ExposureProgram' => Exif::SHORT, # Exposure Program #p38 00198 'SpectralSensitivity' => Exif::ASCII, # Spectral sensitivity 00199 'ISOSpeedRatings' => Exif::SHORT, # ISO speed rating 00200 'OECF' => Exif::IGNORE, 00201 # Optoelectronic conversion factor. Note: We don't have support for this atm. 00202 'ShutterSpeedValue' => Exif::SRATIONAL, # Shutter speed 00203 'ApertureValue' => Exif::RATIONAL, # Aperture 00204 'BrightnessValue' => Exif::SRATIONAL, # Brightness 00205 'ExposureBiasValue' => Exif::SRATIONAL, # Exposure bias 00206 'MaxApertureValue' => Exif::RATIONAL, # Maximum land aperture 00207 'SubjectDistance' => Exif::RATIONAL, # Subject distance 00208 'MeteringMode' => Exif::SHORT, # Metering mode #p40 00209 'LightSource' => Exif::SHORT, # Light source #p40-41 00210 'Flash' => Exif::SHORT, # Flash #p41-42 00211 'FocalLength' => Exif::RATIONAL, # Lens focal length 00212 'SubjectArea' => array( Exif::SHORT, 4 ), # Subject area 00213 'FlashEnergy' => Exif::RATIONAL, # Flash energy 00214 'SpatialFrequencyResponse' => Exif::IGNORE, # Spatial frequency response. Not supported atm. 00215 'FocalPlaneXResolution' => Exif::RATIONAL, # Focal plane X resolution 00216 'FocalPlaneYResolution' => Exif::RATIONAL, # Focal plane Y resolution 00217 'FocalPlaneResolutionUnit' => Exif::SHORT, # Focal plane resolution unit #p46 00218 'SubjectLocation' => array( Exif::SHORT, 2), # Subject location 00219 'ExposureIndex' => Exif::RATIONAL, # Exposure index 00220 'SensingMethod' => Exif::SHORT, # Sensing method #p46 00221 'FileSource' => Exif::UNDEFINED, # File source #p47 00222 'SceneType' => Exif::UNDEFINED, # Scene type #p47 00223 'CFAPattern' => Exif::IGNORE, # CFA pattern. not supported atm. 00224 'CustomRendered' => Exif::SHORT, # Custom image processing #p48 00225 'ExposureMode' => Exif::SHORT, # Exposure mode #p48 00226 'WhiteBalance' => Exif::SHORT, # White Balance #p49 00227 'DigitalZoomRatio' => Exif::RATIONAL, # Digital zoom ration 00228 'FocalLengthIn35mmFilm' => Exif::SHORT, # Focal length in 35 mm film 00229 'SceneCaptureType' => Exif::SHORT, # Scene capture type #p49 00230 'GainControl' => Exif::SHORT, # Scene control #p49-50 00231 'Contrast' => Exif::SHORT, # Contrast #p50 00232 'Saturation' => Exif::SHORT, # Saturation #p50 00233 'Sharpness' => Exif::SHORT, # Sharpness #p50 00234 'DeviceSettingDescription' => Exif::IGNORE, 00235 # Device settings description. This could maybe be supported. Need to find an 00236 # example file that uses this to see if it has stuff of interest in it. 00237 'SubjectDistanceRange' => Exif::SHORT, # Subject distance range #p51 00238 00239 'ImageUniqueID' => Exif::ASCII, # Unique image ID 00240 ), 00241 00242 # GPS Attribute Information (p52) 00243 'GPS' => array( 00244 'GPSVersion' => Exif::UNDEFINED, 00245 # Should be an array of 4 Exif::BYTE's. However php treats it as an undefined 00246 # Note exif standard calls this GPSVersionID, but php doesn't like the id suffix 00247 'GPSLatitudeRef' => Exif::ASCII, # North or South Latitude #p52-53 00248 'GPSLatitude' => array( Exif::RATIONAL, 3 ), # Latitude 00249 'GPSLongitudeRef' => Exif::ASCII, # East or West Longitude #p53 00250 'GPSLongitude' => array( Exif::RATIONAL, 3), # Longitude 00251 'GPSAltitudeRef' => Exif::UNDEFINED, 00252 # Altitude reference. Note, the exif standard says this should be an EXIF::Byte, 00253 # but php seems to disagree. 00254 'GPSAltitude' => Exif::RATIONAL, # Altitude 00255 'GPSTimeStamp' => array( Exif::RATIONAL, 3), # GPS time (atomic clock) 00256 'GPSSatellites' => Exif::ASCII, # Satellites used for measurement 00257 'GPSStatus' => Exif::ASCII, # Receiver status #p54 00258 'GPSMeasureMode' => Exif::ASCII, # Measurement mode #p54-55 00259 'GPSDOP' => Exif::RATIONAL, # Measurement precision 00260 'GPSSpeedRef' => Exif::ASCII, # Speed unit #p55 00261 'GPSSpeed' => Exif::RATIONAL, # Speed of GPS receiver 00262 'GPSTrackRef' => Exif::ASCII, # Reference for direction of movement #p55 00263 'GPSTrack' => Exif::RATIONAL, # Direction of movement 00264 'GPSImgDirectionRef' => Exif::ASCII, # Reference for direction of image #p56 00265 'GPSImgDirection' => Exif::RATIONAL, # Direction of image 00266 'GPSMapDatum' => Exif::ASCII, # Geodetic survey data used 00267 'GPSDestLatitudeRef' => Exif::ASCII, # Reference for latitude of destination #p56 00268 'GPSDestLatitude' => array( Exif::RATIONAL, 3 ), # Latitude destination 00269 'GPSDestLongitudeRef' => Exif::ASCII, # Reference for longitude of destination #p57 00270 'GPSDestLongitude' => array( Exif::RATIONAL, 3 ), # Longitude of destination 00271 'GPSDestBearingRef' => Exif::ASCII, # Reference for bearing of destination #p57 00272 'GPSDestBearing' => Exif::RATIONAL, # Bearing of destination 00273 'GPSDestDistanceRef' => Exif::ASCII, # Reference for distance to destination #p57-58 00274 'GPSDestDistance' => Exif::RATIONAL, # Distance to destination 00275 'GPSProcessingMethod' => Exif::UNDEFINED, # Name of GPS processing method 00276 'GPSAreaInformation' => Exif::UNDEFINED, # Name of GPS area 00277 'GPSDateStamp' => Exif::ASCII, # GPS date 00278 'GPSDifferential' => Exif::SHORT, # GPS differential correction 00279 ), 00280 ); 00281 00282 $this->file = $file; 00283 $this->basename = wfBaseName( $this->file ); 00284 if ( $byteOrder === 'BE' || $byteOrder === 'LE' ) { 00285 $this->byteOrder = $byteOrder; 00286 } else { 00287 // Only give a warning for b/c, since originally we didn't 00288 // require this. The number of things affected by this is 00289 // rather small. 00290 wfWarn( 'Exif class did not have byte order specified. ' 00291 . 'Some properties may be decoded incorrectly.' ); 00292 $this->byteOrder = 'BE'; // BE seems about twice as popular as LE in jpg's. 00293 } 00294 00295 $this->debugFile( $this->basename, __FUNCTION__, true ); 00296 if( function_exists( 'exif_read_data' ) ) { 00297 wfSuppressWarnings(); 00298 $data = exif_read_data( $this->file, 0, true ); 00299 wfRestoreWarnings(); 00300 } else { 00301 throw new MWException( "Internal error: exif_read_data not present. \$wgShowEXIF may be incorrectly set or not checked by an extension." ); 00302 } 00308 $this->mRawExifData = $data ? $data : array(); 00309 $this->makeFilteredData(); 00310 $this->collapseData(); 00311 $this->debugFile( __FUNCTION__, false ); 00312 } 00313 00317 function makeFilteredData() { 00318 $this->mFilteredExifData = Array(); 00319 00320 foreach ( array_keys( $this->mRawExifData ) as $section ) { 00321 if ( !in_array( $section, array_keys( $this->mExifTags ) ) ) { 00322 $this->debug( $section , __FUNCTION__, "'$section' is not a valid Exif section" ); 00323 continue; 00324 } 00325 00326 foreach ( array_keys( $this->mRawExifData[$section] ) as $tag ) { 00327 if ( !in_array( $tag, array_keys( $this->mExifTags[$section] ) ) ) { 00328 $this->debug( $tag, __FUNCTION__, "'$tag' is not a valid tag in '$section'" ); 00329 continue; 00330 } 00331 00332 $this->mFilteredExifData[$tag] = $this->mRawExifData[$section][$tag]; 00333 // This is ok, as the tags in the different sections do not conflict. 00334 // except in computed and thumbnail section, which we don't use. 00335 00336 $value = $this->mRawExifData[$section][$tag]; 00337 if ( !$this->validate( $section, $tag, $value ) ) { 00338 $this->debug( $value, __FUNCTION__, "'$tag' contained invalid data" ); 00339 unset( $this->mFilteredExifData[$tag] ); 00340 } 00341 } 00342 } 00343 } 00344 00363 function collapseData( ) { 00364 00365 $this->exifGPStoNumber( 'GPSLatitude' ); 00366 $this->exifGPStoNumber( 'GPSDestLatitude' ); 00367 $this->exifGPStoNumber( 'GPSLongitude' ); 00368 $this->exifGPStoNumber( 'GPSDestLongitude' ); 00369 00370 if ( isset( $this->mFilteredExifData['GPSAltitude'] ) && isset( $this->mFilteredExifData['GPSAltitudeRef'] ) ) { 00371 if ( $this->mFilteredExifData['GPSAltitudeRef'] === "\1" ) { 00372 $this->mFilteredExifData['GPSAltitude'] *= - 1; 00373 } 00374 unset( $this->mFilteredExifData['GPSAltitudeRef'] ); 00375 } 00376 00377 $this->exifPropToOrd( 'FileSource' ); 00378 $this->exifPropToOrd( 'SceneType' ); 00379 00380 $this->charCodeString( 'UserComment' ); 00381 $this->charCodeString( 'GPSProcessingMethod'); 00382 $this->charCodeString( 'GPSAreaInformation' ); 00383 00384 //ComponentsConfiguration should really be an array instead of a string... 00385 //This turns a string of binary numbers into an array of numbers. 00386 00387 if ( isset ( $this->mFilteredExifData['ComponentsConfiguration'] ) ) { 00388 $val = $this->mFilteredExifData['ComponentsConfiguration']; 00389 $ccVals = array(); 00390 for ($i = 0; $i < strlen($val); $i++) { 00391 $ccVals[$i] = ord( substr($val, $i, 1) ); 00392 } 00393 $ccVals['_type'] = 'ol'; //this is for formatting later. 00394 $this->mFilteredExifData['ComponentsConfiguration'] = $ccVals; 00395 } 00396 00397 //GPSVersion(ID) is treated as the wrong type by php exif support. 00398 //Go through each byte turning it into a version string. 00399 //For example: "\x02\x02\x00\x00" -> "2.2.0.0" 00400 00401 //Also change exif tag name from GPSVersion (what php exif thinks it is) 00402 //to GPSVersionID (what the exif standard thinks it is). 00403 00404 if ( isset ( $this->mFilteredExifData['GPSVersion'] ) ) { 00405 $val = $this->mFilteredExifData['GPSVersion']; 00406 $newVal = ''; 00407 for ($i = 0; $i < strlen($val); $i++) { 00408 if ( $i !== 0 ) { 00409 $newVal .= '.'; 00410 } 00411 $newVal .= ord( substr($val, $i, 1) ); 00412 } 00413 if ( $this->byteOrder === 'LE' ) { 00414 // Need to reverse the string 00415 $newVal2 = ''; 00416 for ( $i = strlen( $newVal ) - 1; $i >= 0; $i-- ) { 00417 $newVal2 .= substr( $newVal, $i, 1 ); 00418 } 00419 $this->mFilteredExifData['GPSVersionID'] = $newVal2; 00420 } else { 00421 $this->mFilteredExifData['GPSVersionID'] = $newVal; 00422 } 00423 unset( $this->mFilteredExifData['GPSVersion'] ); 00424 } 00425 00426 } 00433 private function charCodeString ( $prop ) { 00434 if ( isset( $this->mFilteredExifData[$prop] ) ) { 00435 00436 if ( strlen($this->mFilteredExifData[$prop]) <= 8 ) { 00437 //invalid. Must be at least 9 bytes long. 00438 00439 $this->debug( $this->mFilteredExifData[$prop] , __FUNCTION__, false ); 00440 unset($this->mFilteredExifData[$prop]); 00441 return; 00442 } 00443 $charCode = substr( $this->mFilteredExifData[$prop], 0, 8); 00444 $val = substr( $this->mFilteredExifData[$prop], 8); 00445 00446 00447 switch ($charCode) { 00448 case "\x4A\x49\x53\x00\x00\x00\x00\x00": 00449 //JIS 00450 $charset = "Shift-JIS"; 00451 break; 00452 case "UNICODE\x00": 00453 $charset = "UTF-16" . $this->byteOrder; 00454 break; 00455 default: //ascii or undefined. 00456 $charset = ""; 00457 break; 00458 } 00459 // This could possibly check to see if iconv is really installed 00460 // or if we're using the compatibility wrapper in globalFunctions.php 00461 if ($charset) { 00462 wfSuppressWarnings(); 00463 $val = iconv($charset, 'UTF-8//IGNORE', $val); 00464 wfRestoreWarnings(); 00465 } else { 00466 // if valid utf-8, assume that, otherwise assume windows-1252 00467 $valCopy = $val; 00468 UtfNormal::quickIsNFCVerify( $valCopy ); //validates $valCopy. 00469 if ( $valCopy !== $val ) { 00470 wfSuppressWarnings(); 00471 $val = iconv('Windows-1252', 'UTF-8//IGNORE', $val); 00472 wfRestoreWarnings(); 00473 } 00474 } 00475 00476 //trim and check to make sure not only whitespace. 00477 $val = trim($val); 00478 if ( strlen( $val ) === 0 ) { 00479 //only whitespace. 00480 $this->debug( $this->mFilteredExifData[$prop] , __FUNCTION__, "$prop: Is only whitespace" ); 00481 unset($this->mFilteredExifData[$prop]); 00482 return; 00483 } 00484 00485 //all's good. 00486 $this->mFilteredExifData[$prop] = $val; 00487 } 00488 } 00495 private function exifPropToOrd ( $prop ) { 00496 if ( isset( $this->mFilteredExifData[$prop] ) ) { 00497 $this->mFilteredExifData[$prop] = ord( $this->mFilteredExifData[$prop] ); 00498 } 00499 } 00505 private function exifGPStoNumber ( $prop ) { 00506 $loc =& $this->mFilteredExifData[$prop]; 00507 $dir =& $this->mFilteredExifData[$prop . 'Ref']; 00508 $res = false; 00509 00510 if ( isset( $loc ) && isset( $dir ) && ( $dir === 'N' || $dir === 'S' || $dir === 'E' || $dir === 'W' ) ) { 00511 list( $num, $denom ) = explode( '/', $loc[0] ); 00512 $res = $num / $denom; 00513 list( $num, $denom ) = explode( '/', $loc[1] ); 00514 $res += ( $num / $denom ) * ( 1 / 60 ); 00515 list( $num, $denom ) = explode( '/', $loc[2] ); 00516 $res += ( $num / $denom ) * ( 1 / 3600 ); 00517 00518 if ( $dir === 'S' || $dir === 'W' ) { 00519 $res *= - 1; // make negative 00520 } 00521 } 00522 00523 // update the exif records. 00524 00525 if ( $res !== false ) { // using !== as $res could potentially be 0 00526 $this->mFilteredExifData[$prop] = $res; 00527 unset( $this->mFilteredExifData[$prop . 'Ref'] ); 00528 } else { // if invalid 00529 unset( $this->mFilteredExifData[$prop] ); 00530 unset( $this->mFilteredExifData[$prop . 'Ref'] ); 00531 } 00532 } 00533 00540 function makeFormattedData( ) { 00541 wfDeprecated( __METHOD__, '1.18' ); 00542 $this->mFormattedExifData = FormatMetadata::getFormattedData( 00543 $this->mFilteredExifData ); 00544 } 00553 function getData() { 00554 return $this->mRawExifData; 00555 } 00556 00560 function getFilteredData() { 00561 return $this->mFilteredExifData; 00562 } 00563 00572 function getFormattedData() { 00573 wfDeprecated( __METHOD__, '1.18' ); 00574 if (!$this->mFormattedExifData) { 00575 $this->makeFormattedData(); 00576 } 00577 return $this->mFormattedExifData; 00578 } 00593 public static function version() { 00594 return 2; // We don't need no bloddy constants! 00595 } 00596 00605 private function isByte( $in ) { 00606 if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 255 ) { 00607 $this->debug( $in, __FUNCTION__, true ); 00608 return true; 00609 } else { 00610 $this->debug( $in, __FUNCTION__, false ); 00611 return false; 00612 } 00613 } 00614 00619 private function isASCII( $in ) { 00620 if ( is_array( $in ) ) { 00621 return false; 00622 } 00623 00624 if ( preg_match( "/[^\x0a\x20-\x7e]/", $in ) ) { 00625 $this->debug( $in, __FUNCTION__, 'found a character not in our whitelist' ); 00626 return false; 00627 } 00628 00629 if ( preg_match( '/^\s*$/', $in ) ) { 00630 $this->debug( $in, __FUNCTION__, 'input consisted solely of whitespace' ); 00631 return false; 00632 } 00633 00634 return true; 00635 } 00636 00641 private function isShort( $in ) { 00642 if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 65536 ) { 00643 $this->debug( $in, __FUNCTION__, true ); 00644 return true; 00645 } else { 00646 $this->debug( $in, __FUNCTION__, false ); 00647 return false; 00648 } 00649 } 00650 00655 private function isLong( $in ) { 00656 if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 4294967296 ) { 00657 $this->debug( $in, __FUNCTION__, true ); 00658 return true; 00659 } else { 00660 $this->debug( $in, __FUNCTION__, false ); 00661 return false; 00662 } 00663 } 00664 00669 private function isRational( $in ) { 00670 $m = array(); 00671 if ( !is_array( $in ) && @preg_match( '/^(\d+)\/(\d+[1-9]|[1-9]\d*)$/', $in, $m ) ) { # Avoid division by zero 00672 return $this->isLong( $m[1] ) && $this->isLong( $m[2] ); 00673 } else { 00674 $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' ); 00675 return false; 00676 } 00677 } 00678 00683 private function isUndefined( $in ) { 00684 $this->debug( $in, __FUNCTION__, true ); 00685 return true; 00686 } 00687 00692 private function isSlong( $in ) { 00693 if ( $this->isLong( abs( $in ) ) ) { 00694 $this->debug( $in, __FUNCTION__, true ); 00695 return true; 00696 } else { 00697 $this->debug( $in, __FUNCTION__, false ); 00698 return false; 00699 } 00700 } 00701 00706 private function isSrational( $in ) { 00707 $m = array(); 00708 if ( !is_array( $in ) && preg_match( '/^(-?\d+)\/(\d+[1-9]|[1-9]\d*)$/', $in, $m ) ) { # Avoid division by zero 00709 return $this->isSlong( $m[0] ) && $this->isSlong( $m[1] ); 00710 } else { 00711 $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' ); 00712 return false; 00713 } 00714 } 00727 private function validate( $section, $tag, $val, $recursive = false ) { 00728 $debug = "tag is '$tag'"; 00729 $etype = $this->mExifTags[$section][$tag]; 00730 $ecount = 1; 00731 if( is_array( $etype ) ) { 00732 list( $etype, $ecount ) = $etype; 00733 if ( $recursive ) 00734 $ecount = 1; // checking individual elements 00735 } 00736 $count = count( $val ); 00737 if( $ecount != $count ) { 00738 $this->debug( $val, __FUNCTION__, "Expected $ecount elements for $tag but got $count" ); 00739 return false; 00740 } 00741 if( $count > 1 ) { 00742 foreach( $val as $v ) { 00743 if( !$this->validate( $section, $tag, $v, true ) ) { 00744 return false; 00745 } 00746 } 00747 return true; 00748 } 00749 // Does not work if not typecast 00750 switch( (string)$etype ) { 00751 case (string)Exif::BYTE: 00752 $this->debug( $val, __FUNCTION__, $debug ); 00753 return $this->isByte( $val ); 00754 case (string)Exif::ASCII: 00755 $this->debug( $val, __FUNCTION__, $debug ); 00756 return $this->isASCII( $val ); 00757 case (string)Exif::SHORT: 00758 $this->debug( $val, __FUNCTION__, $debug ); 00759 return $this->isShort( $val ); 00760 case (string)Exif::LONG: 00761 $this->debug( $val, __FUNCTION__, $debug ); 00762 return $this->isLong( $val ); 00763 case (string)Exif::RATIONAL: 00764 $this->debug( $val, __FUNCTION__, $debug ); 00765 return $this->isRational( $val ); 00766 case (string)Exif::UNDEFINED: 00767 $this->debug( $val, __FUNCTION__, $debug ); 00768 return $this->isUndefined( $val ); 00769 case (string)Exif::SLONG: 00770 $this->debug( $val, __FUNCTION__, $debug ); 00771 return $this->isSlong( $val ); 00772 case (string)Exif::SRATIONAL: 00773 $this->debug( $val, __FUNCTION__, $debug ); 00774 return $this->isSrational( $val ); 00775 case (string)Exif::SHORT.','.Exif::LONG: 00776 $this->debug( $val, __FUNCTION__, $debug ); 00777 return $this->isShort( $val ) || $this->isLong( $val ); 00778 case (string)Exif::IGNORE: 00779 $this->debug( $val, __FUNCTION__, $debug ); 00780 return false; 00781 default: 00782 $this->debug( $val, __FUNCTION__, "The tag '$tag' is unknown" ); 00783 return false; 00784 } 00785 } 00786 00796 private function debug( $in, $fname, $action = null ) { 00797 if ( !$this->log ) { 00798 return; 00799 } 00800 $type = gettype( $in ); 00801 $class = ucfirst( __CLASS__ ); 00802 if ( $type === 'array' ) { 00803 $in = print_r( $in, true ); 00804 } 00805 00806 if ( $action === true ) { 00807 wfDebugLog( $this->log, "$class::$fname: accepted: '$in' (type: $type)\n"); 00808 } elseif ( $action === false ) { 00809 wfDebugLog( $this->log, "$class::$fname: rejected: '$in' (type: $type)\n"); 00810 } elseif ( $action === null ) { 00811 wfDebugLog( $this->log, "$class::$fname: input was: '$in' (type: $type)\n"); 00812 } else { 00813 wfDebugLog( $this->log, "$class::$fname: $action (type: $type; content: '$in')\n"); 00814 } 00815 } 00816 00825 private function debugFile( $fname, $io ) { 00826 if ( !$this->log ) { 00827 return; 00828 } 00829 $class = ucfirst( __CLASS__ ); 00830 if ( $io ) { 00831 wfDebugLog( $this->log, "$class::$fname: begin processing: '{$this->basename}'\n" ); 00832 } else { 00833 wfDebugLog( $this->log, "$class::$fname: end processing: '{$this->basename}'\n" ); 00834 } 00835 } 00836 } 00837
1.7.6.1