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getid3.lib.php
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getid3.lib.php
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<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at https://github.com/JamesHeinrich/getID3 //
// or https://www.getid3.org //
// or http://getid3.sourceforge.net //
// //
// getid3.lib.php - part of getID3() //
// see readme.txt for more details //
// ///
/////////////////////////////////////////////////////////////////
if (!defined('GETID3_LIBXML_OPTIONS') && defined('LIBXML_VERSION')) {
if (LIBXML_VERSION >= 20621) {
define('GETID3_LIBXML_OPTIONS', LIBXML_NOENT | LIBXML_NONET | LIBXML_NOWARNING | LIBXML_COMPACT);
} else {
define('GETID3_LIBXML_OPTIONS', LIBXML_NOENT | LIBXML_NONET | LIBXML_NOWARNING);
}
}
class getid3_lib
{
/**
* @param string $string
* @param bool $hex
* @param bool $spaces
* @param string|bool $htmlencoding
*
* @return string
*/
public static function PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8') {
$returnstring = '';
for ($i = 0; $i < strlen($string); $i++) {
if ($hex) {
$returnstring .= str_pad(dechex(ord($string[$i])), 2, '0', STR_PAD_LEFT);
} else {
$returnstring .= ' '.(preg_match("#[\x20-\x7E]#", $string[$i]) ? $string[$i] : '¤');
}
if ($spaces) {
$returnstring .= ' ';
}
}
if (!empty($htmlencoding)) {
if ($htmlencoding === true) {
$htmlencoding = 'UTF-8'; // prior to getID3 v1.9.0 the function's 4th parameter was boolean
}
$returnstring = htmlentities($returnstring, ENT_QUOTES, $htmlencoding);
}
return $returnstring;
}
/**
* Truncates a floating-point number at the decimal point.
*
* @param float $floatnumber
*
* @return float|int returns int (if possible, otherwise float)
*/
public static function trunc($floatnumber) {
if ($floatnumber >= 1) {
$truncatednumber = floor($floatnumber);
} elseif ($floatnumber <= -1) {
$truncatednumber = ceil($floatnumber);
} else {
$truncatednumber = 0;
}
if (self::intValueSupported($truncatednumber)) {
$truncatednumber = (int) $truncatednumber;
}
return $truncatednumber;
}
/**
* @param int|null $variable
* @param int $increment
*
* @return bool
*/
public static function safe_inc(&$variable, $increment=1) {
if (isset($variable)) {
$variable += $increment;
} else {
$variable = $increment;
}
return true;
}
/**
* @param int|float $floatnum
*
* @return int|float
*/
public static function CastAsInt($floatnum) {
// convert to float if not already
$floatnum = (float) $floatnum;
// convert a float to type int, only if possible
if (self::trunc($floatnum) == $floatnum) {
// it's not floating point
if (self::intValueSupported($floatnum)) {
// it's within int range
$floatnum = (int) $floatnum;
}
}
return $floatnum;
}
/**
* @param int $num
*
* @return bool
*/
public static function intValueSupported($num) {
// check if integers are 64-bit
static $hasINT64 = null;
if ($hasINT64 === null) { // 10x faster than is_null()
/** @var int|float|false $bigInt */
$bigInt = pow(2, 31);
$hasINT64 = is_int($bigInt); // 32-bit int are limited to (2^31)-1
if (!$hasINT64 && !defined('PHP_INT_MIN')) {
define('PHP_INT_MIN', ~PHP_INT_MAX);
}
}
// if integers are 64-bit - no other check required
if ($hasINT64 || (($num <= PHP_INT_MAX) && ($num >= PHP_INT_MIN))) {
return true;
}
return false;
}
/**
* Perform a division, guarding against division by zero
*
* @param float|int $numerator
* @param float|int $denominator
* @param float|int $fallback
* @return float|int
*/
public static function SafeDiv($numerator, $denominator, $fallback = 0) {
return $denominator ? $numerator / $denominator : $fallback;
}
/**
* @param string $fraction
*
* @return float
*/
public static function DecimalizeFraction($fraction) {
list($numerator, $denominator) = explode('/', $fraction);
return (int) $numerator / ($denominator ? $denominator : 1);
}
/**
* @param string $binarynumerator
*
* @return float
*/
public static function DecimalBinary2Float($binarynumerator) {
$numerator = self::Bin2Dec($binarynumerator);
$denominator = self::Bin2Dec('1'.str_repeat('0', strlen($binarynumerator)));
return ($numerator / $denominator);
}
/**
* @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html
*
* @param string $binarypointnumber
* @param int $maxbits
*
* @return array
*/
public static function NormalizeBinaryPoint($binarypointnumber, $maxbits=52) {
if (strpos($binarypointnumber, '.') === false) {
$binarypointnumber = '0.'.$binarypointnumber;
} elseif ($binarypointnumber[0] == '.') {
$binarypointnumber = '0'.$binarypointnumber;
}
$exponent = 0;
while (($binarypointnumber[0] != '1') || (substr($binarypointnumber, 1, 1) != '.')) {
if (substr($binarypointnumber, 1, 1) == '.') {
$exponent--;
$binarypointnumber = substr($binarypointnumber, 2, 1).'.'.substr($binarypointnumber, 3);
} else {
$pointpos = strpos($binarypointnumber, '.');
$exponent += ($pointpos - 1);
$binarypointnumber = str_replace('.', '', $binarypointnumber);
$binarypointnumber = $binarypointnumber[0].'.'.substr($binarypointnumber, 1);
}
}
$binarypointnumber = str_pad(substr($binarypointnumber, 0, $maxbits + 2), $maxbits + 2, '0', STR_PAD_RIGHT);
return array('normalized'=>$binarypointnumber, 'exponent'=>(int) $exponent);
}
/**
* @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html
*
* @param float $floatvalue
*
* @return string
*/
public static function Float2BinaryDecimal($floatvalue) {
$maxbits = 128; // to how many bits of precision should the calculations be taken?
$intpart = self::trunc($floatvalue);
$floatpart = abs($floatvalue - $intpart);
$pointbitstring = '';
while (($floatpart != 0) && (strlen($pointbitstring) < $maxbits)) {
$floatpart *= 2;
$pointbitstring .= (string) self::trunc($floatpart);
$floatpart -= self::trunc($floatpart);
}
$binarypointnumber = decbin($intpart).'.'.$pointbitstring;
return $binarypointnumber;
}
/**
* @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee-expl.html
*
* @param float $floatvalue
* @param int $bits
*
* @return string|false
*/
public static function Float2String($floatvalue, $bits) {
$exponentbits = 0;
$fractionbits = 0;
switch ($bits) {
case 32:
$exponentbits = 8;
$fractionbits = 23;
break;
case 64:
$exponentbits = 11;
$fractionbits = 52;
break;
default:
return false;
}
if ($floatvalue >= 0) {
$signbit = '0';
} else {
$signbit = '1';
}
$normalizedbinary = self::NormalizeBinaryPoint(self::Float2BinaryDecimal($floatvalue), $fractionbits);
$biasedexponent = pow(2, $exponentbits - 1) - 1 + $normalizedbinary['exponent']; // (127 or 1023) +/- exponent
$exponentbitstring = str_pad(decbin($biasedexponent), $exponentbits, '0', STR_PAD_LEFT);
$fractionbitstring = str_pad(substr($normalizedbinary['normalized'], 2), $fractionbits, '0', STR_PAD_RIGHT);
return self::BigEndian2String(self::Bin2Dec($signbit.$exponentbitstring.$fractionbitstring), $bits % 8, false);
}
/**
* @param string $byteword
*
* @return float|false
*/
public static function LittleEndian2Float($byteword) {
return self::BigEndian2Float(strrev($byteword));
}
/**
* ANSI/IEEE Standard 754-1985, Standard for Binary Floating Point Arithmetic
*
* @link https://web.archive.org/web/20120325162206/http://www.psc.edu/general/software/packages/ieee/ieee.php
* @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee.html
*
* @param string $byteword
*
* @return float|false
*/
public static function BigEndian2Float($byteword) {
$bitword = self::BigEndian2Bin($byteword);
if (!$bitword) {
return 0;
}
$signbit = $bitword[0];
$floatvalue = 0;
$exponentbits = 0;
$fractionbits = 0;
switch (strlen($byteword) * 8) {
case 32:
$exponentbits = 8;
$fractionbits = 23;
break;
case 64:
$exponentbits = 11;
$fractionbits = 52;
break;
case 80:
// 80-bit Apple SANE format
// http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/
$exponentstring = substr($bitword, 1, 15);
$isnormalized = intval($bitword[16]);
$fractionstring = substr($bitword, 17, 63);
$exponent = pow(2, self::Bin2Dec($exponentstring) - 16383);
$fraction = $isnormalized + self::DecimalBinary2Float($fractionstring);
$floatvalue = $exponent * $fraction;
if ($signbit == '1') {
$floatvalue *= -1;
}
return $floatvalue;
default:
return false;
}
$exponentstring = substr($bitword, 1, $exponentbits);
$fractionstring = substr($bitword, $exponentbits + 1, $fractionbits);
$exponent = self::Bin2Dec($exponentstring);
$fraction = self::Bin2Dec($fractionstring);
if (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction != 0)) {
// Not a Number
$floatvalue = NAN;
} elseif (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction == 0)) {
if ($signbit == '1') {
$floatvalue = -INF;
} else {
$floatvalue = INF;
}
} elseif (($exponent == 0) && ($fraction == 0)) {
if ($signbit == '1') {
$floatvalue = -0.0;
} else {
$floatvalue = 0.0;
}
} elseif (($exponent == 0) && ($fraction != 0)) {
// These are 'unnormalized' values
$floatvalue = pow(2, (-1 * (pow(2, $exponentbits - 1) - 2))) * self::DecimalBinary2Float($fractionstring);
if ($signbit == '1') {
$floatvalue *= -1;
}
} elseif ($exponent != 0) {
$floatvalue = pow(2, ($exponent - (pow(2, $exponentbits - 1) - 1))) * (1 + self::DecimalBinary2Float($fractionstring));
if ($signbit == '1') {
$floatvalue *= -1;
}
}
return (float) $floatvalue;
}
/**
* @param string $byteword
* @param bool $synchsafe
* @param bool $signed
*
* @return int|float|false
* @throws Exception
*/
public static function BigEndian2Int($byteword, $synchsafe=false, $signed=false) {
$intvalue = 0;
$bytewordlen = strlen($byteword);
if ($bytewordlen == 0) {
return false;
}
for ($i = 0; $i < $bytewordlen; $i++) {
if ($synchsafe) { // disregard MSB, effectively 7-bit bytes
//$intvalue = $intvalue | (ord($byteword{$i}) & 0x7F) << (($bytewordlen - 1 - $i) * 7); // faster, but runs into problems past 2^31 on 32-bit systems
$intvalue += (ord($byteword[$i]) & 0x7F) * pow(2, ($bytewordlen - 1 - $i) * 7);
} else {
$intvalue += ord($byteword[$i]) * pow(256, ($bytewordlen - 1 - $i));
}
}
if ($signed && !$synchsafe) {
// synchsafe ints are not allowed to be signed
if ($bytewordlen <= PHP_INT_SIZE) {
$signMaskBit = 0x80 << (8 * ($bytewordlen - 1));
if ($intvalue & $signMaskBit) {
$intvalue = 0 - ($intvalue & ($signMaskBit - 1));
}
} else {
throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits ('.strlen($byteword).') in self::BigEndian2Int()');
}
}
return self::CastAsInt($intvalue);
}
/**
* @param string $byteword
* @param bool $signed
*
* @return int|float|false
*/
public static function LittleEndian2Int($byteword, $signed=false) {
return self::BigEndian2Int(strrev($byteword), false, $signed);
}
/**
* @param string $byteword
*
* @return string
*/
public static function LittleEndian2Bin($byteword) {
return self::BigEndian2Bin(strrev($byteword));
}
/**
* @param string $byteword
*
* @return string
*/
public static function BigEndian2Bin($byteword) {
$binvalue = '';
$bytewordlen = strlen($byteword);
for ($i = 0; $i < $bytewordlen; $i++) {
$binvalue .= str_pad(decbin(ord($byteword[$i])), 8, '0', STR_PAD_LEFT);
}
return $binvalue;
}
/**
* @param int $number
* @param int $minbytes
* @param bool $synchsafe
* @param bool $signed
*
* @return string
* @throws Exception
*/
public static function BigEndian2String($number, $minbytes=1, $synchsafe=false, $signed=false) {
if ($number < 0) {
throw new Exception('ERROR: self::BigEndian2String() does not support negative numbers');
}
$maskbyte = (($synchsafe || $signed) ? 0x7F : 0xFF);
$intstring = '';
if ($signed) {
if ($minbytes > PHP_INT_SIZE) {
throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits in self::BigEndian2String()');
}
$number = $number & (0x80 << (8 * ($minbytes - 1)));
}
while ($number != 0) {
$quotient = ($number / ($maskbyte + 1));
$intstring = chr(ceil(($quotient - floor($quotient)) * $maskbyte)).$intstring;
$number = floor($quotient);
}
return str_pad($intstring, $minbytes, "\x00", STR_PAD_LEFT);
}
/**
* @param int $number
*
* @return string
*/
public static function Dec2Bin($number) {
if (!is_numeric($number)) {
// https://github.com/JamesHeinrich/getID3/issues/299
trigger_error('TypeError: Dec2Bin(): Argument #1 ($number) must be numeric, '.gettype($number).' given', E_USER_WARNING);
return '';
}
$bytes = array();
while ($number >= 256) {
$bytes[] = (int) (($number / 256) - (floor($number / 256))) * 256;
$number = floor($number / 256);
}
$bytes[] = (int) $number;
$binstring = '';
foreach ($bytes as $i => $byte) {
$binstring = (($i == count($bytes) - 1) ? decbin($byte) : str_pad(decbin($byte), 8, '0', STR_PAD_LEFT)).$binstring;
}
return $binstring;
}
/**
* @param string $binstring
* @param bool $signed
*
* @return int|float
*/
public static function Bin2Dec($binstring, $signed=false) {
$signmult = 1;
if ($signed) {
if ($binstring[0] == '1') {
$signmult = -1;
}
$binstring = substr($binstring, 1);
}
$decvalue = 0;
for ($i = 0; $i < strlen($binstring); $i++) {
$decvalue += ((int) substr($binstring, strlen($binstring) - $i - 1, 1)) * pow(2, $i);
}
return self::CastAsInt($decvalue * $signmult);
}
/**
* @param string $binstring
*
* @return string
*/
public static function Bin2String($binstring) {
// return 'hi' for input of '0110100001101001'
$string = '';
$binstringreversed = strrev($binstring);
for ($i = 0; $i < strlen($binstringreversed); $i += 8) {
$string = chr(self::Bin2Dec(strrev(substr($binstringreversed, $i, 8)))).$string;
}
return $string;
}
/**
* @param int $number
* @param int $minbytes
* @param bool $synchsafe
*
* @return string
*/
public static function LittleEndian2String($number, $minbytes=1, $synchsafe=false) {
$intstring = '';
while ($number > 0) {
if ($synchsafe) {
$intstring = $intstring.chr($number & 127);
$number >>= 7;
} else {
$intstring = $intstring.chr($number & 255);
$number >>= 8;
}
}
return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT);
}
/**
* @param mixed $array1
* @param mixed $array2
*
* @return array|false
*/
public static function array_merge_clobber($array1, $array2) {
// written by kcØhireability*com
// taken from http://www.php.net/manual/en/function.array-merge-recursive.php
if (!is_array($array1) || !is_array($array2)) {
return false;
}
$newarray = $array1;
foreach ($array2 as $key => $val) {
if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) {
$newarray[$key] = self::array_merge_clobber($newarray[$key], $val);
} else {
$newarray[$key] = $val;
}
}
return $newarray;
}
/**
* @param mixed $array1
* @param mixed $array2
*
* @return array|false
*/
public static function array_merge_noclobber($array1, $array2) {
if (!is_array($array1) || !is_array($array2)) {
return false;
}
$newarray = $array1;
foreach ($array2 as $key => $val) {
if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) {
$newarray[$key] = self::array_merge_noclobber($newarray[$key], $val);
} elseif (!isset($newarray[$key])) {
$newarray[$key] = $val;
}
}
return $newarray;
}
/**
* @param mixed $array1
* @param mixed $array2
*
* @return array|false|null
*/
public static function flipped_array_merge_noclobber($array1, $array2) {
if (!is_array($array1) || !is_array($array2)) {
return false;
}
# naturally, this only works non-recursively
$newarray = array_flip($array1);
foreach (array_flip($array2) as $key => $val) {
if (!isset($newarray[$key])) {
$newarray[$key] = count($newarray);
}
}
return array_flip($newarray);
}
/**
* @param array $theArray
*
* @return bool
*/
public static function ksort_recursive(&$theArray) {
ksort($theArray);
foreach ($theArray as $key => $value) {
if (is_array($value)) {
self::ksort_recursive($theArray[$key]);
}
}
return true;
}
/**
* @param string $filename
* @param int $numextensions
*
* @return string
*/
public static function fileextension($filename, $numextensions=1) {
if (strstr($filename, '.')) {
$reversedfilename = strrev($filename);
$offset = 0;
for ($i = 0; $i < $numextensions; $i++) {
$offset = strpos($reversedfilename, '.', $offset + 1);
if ($offset === false) {
return '';
}
}
return strrev(substr($reversedfilename, 0, $offset));
}
return '';
}
/**
* @param int $seconds
*
* @return string
*/
public static function PlaytimeString($seconds) {
$sign = (($seconds < 0) ? '-' : '');
$seconds = round(abs($seconds));
$H = (int) floor( $seconds / 3600);
$M = (int) floor(($seconds - (3600 * $H) ) / 60);
$S = (int) round( $seconds - (3600 * $H) - (60 * $M) );
return $sign.($H ? $H.':' : '').($H ? str_pad($M, 2, '0', STR_PAD_LEFT) : intval($M)).':'.str_pad($S, 2, 0, STR_PAD_LEFT);
}
/**
* @param int $macdate
*
* @return int|float
*/
public static function DateMac2Unix($macdate) {
// Macintosh timestamp: seconds since 00:00h January 1, 1904
// UNIX timestamp: seconds since 00:00h January 1, 1970
return self::CastAsInt($macdate - 2082844800);
}
/**
* @param string $rawdata
*
* @return float
*/
public static function FixedPoint8_8($rawdata) {
return self::BigEndian2Int(substr($rawdata, 0, 1)) + (float) (self::BigEndian2Int(substr($rawdata, 1, 1)) / pow(2, 8));
}
/**
* @param string $rawdata
*
* @return float
*/
public static function FixedPoint16_16($rawdata) {
return self::BigEndian2Int(substr($rawdata, 0, 2)) + (float) (self::BigEndian2Int(substr($rawdata, 2, 2)) / pow(2, 16));
}
/**
* @param string $rawdata
*
* @return float
*/
public static function FixedPoint2_30($rawdata) {
$binarystring = self::BigEndian2Bin($rawdata);
return self::Bin2Dec(substr($binarystring, 0, 2)) + (float) (self::Bin2Dec(substr($binarystring, 2, 30)) / pow(2, 30));
}
/**
* @param string $ArrayPath
* @param string $Separator
* @param mixed $Value
*
* @return array
*/
public static function CreateDeepArray($ArrayPath, $Separator, $Value) {
// assigns $Value to a nested array path:
// $foo = self::CreateDeepArray('/path/to/my', '/', 'file.txt')
// is the same as:
// $foo = array('path'=>array('to'=>'array('my'=>array('file.txt'))));
// or
// $foo['path']['to']['my'] = 'file.txt';
$ArrayPath = ltrim($ArrayPath, $Separator);
$ReturnedArray = array();
if (($pos = strpos($ArrayPath, $Separator)) !== false) {
$ReturnedArray[substr($ArrayPath, 0, $pos)] = self::CreateDeepArray(substr($ArrayPath, $pos + 1), $Separator, $Value);
} else {
$ReturnedArray[$ArrayPath] = $Value;
}
return $ReturnedArray;
}
/**
* @param array $arraydata
* @param bool $returnkey
*
* @return int|false
*/
public static function array_max($arraydata, $returnkey=false) {
$maxvalue = false;
$maxkey = false;
foreach ($arraydata as $key => $value) {
if (!is_array($value)) {
if (($maxvalue === false) || ($value > $maxvalue)) {
$maxvalue = $value;
$maxkey = $key;
}
}
}
return ($returnkey ? $maxkey : $maxvalue);
}
/**
* @param array $arraydata
* @param bool $returnkey
*
* @return int|false
*/
public static function array_min($arraydata, $returnkey=false) {
$minvalue = false;
$minkey = false;
foreach ($arraydata as $key => $value) {
if (!is_array($value)) {
if (($minvalue === false) || ($value < $minvalue)) {
$minvalue = $value;
$minkey = $key;
}
}
}
return ($returnkey ? $minkey : $minvalue);
}
/**
* @param string $XMLstring
*
* @return array|false
*/
public static function XML2array($XMLstring) {
if (function_exists('simplexml_load_string')) {
if (PHP_VERSION_ID < 80000) {
if (function_exists('libxml_disable_entity_loader')) {
// http://websec.io/2012/08/27/Preventing-XEE-in-PHP.html
// https://core.trac.wordpress.org/changeset/29378
// This function has been deprecated in PHP 8.0 because in libxml 2.9.0, external entity loading is
// disabled by default, but is still needed when LIBXML_NOENT is used.
$loader = @libxml_disable_entity_loader(true);
$XMLobject = simplexml_load_string($XMLstring, 'SimpleXMLElement', GETID3_LIBXML_OPTIONS);
$return = self::SimpleXMLelement2array($XMLobject);
@libxml_disable_entity_loader($loader);
return $return;
}
} else {
$allow = false;
if (defined('LIBXML_VERSION') && (LIBXML_VERSION >= 20900)) {
// https://www.php.net/manual/en/function.libxml-disable-entity-loader.php
// "as of libxml 2.9.0 entity substitution is disabled by default, so there is no need to disable the loading
// of external entities, unless there is the need to resolve internal entity references with LIBXML_NOENT."
$allow = true;
} elseif (function_exists('libxml_set_external_entity_loader')) {
libxml_set_external_entity_loader(function () { return null; }); // https://www.zend.com/blog/cve-2023-3823
$allow = true;
}
if ($allow) {
$XMLobject = simplexml_load_string($XMLstring, 'SimpleXMLElement', GETID3_LIBXML_OPTIONS);
$return = self::SimpleXMLelement2array($XMLobject);
return $return;
}
}
}
return false;
}
/**
* @param SimpleXMLElement|array|mixed $XMLobject
*
* @return mixed
*/
public static function SimpleXMLelement2array($XMLobject) {
if (!is_object($XMLobject) && !is_array($XMLobject)) {
return $XMLobject;
}
$XMLarray = $XMLobject instanceof SimpleXMLElement ? get_object_vars($XMLobject) : $XMLobject;
foreach ($XMLarray as $key => $value) {
$XMLarray[$key] = self::SimpleXMLelement2array($value);
}
return $XMLarray;
}
/**
* Returns checksum for a file from starting position to absolute end position.
*
* @param string $file
* @param int $offset
* @param int $end
* @param string $algorithm
*
* @return string|false
* @throws getid3_exception
*/
public static function hash_data($file, $offset, $end, $algorithm) {
if (!self::intValueSupported($end)) {
return false;
}
if (!in_array($algorithm, array('md5', 'sha1'))) {
throw new getid3_exception('Invalid algorithm ('.$algorithm.') in self::hash_data()');
}
$size = $end - $offset;
$fp = fopen($file, 'rb');
fseek($fp, $offset);
$ctx = hash_init($algorithm);
while ($size > 0) {
$buffer = fread($fp, min($size, getID3::FREAD_BUFFER_SIZE));
hash_update($ctx, $buffer);
$size -= getID3::FREAD_BUFFER_SIZE;
}
$hash = hash_final($ctx);
fclose($fp);
return $hash;
}
/**
* @param string $filename_source
* @param string $filename_dest
* @param int $offset
* @param int $length
*
* @return bool
* @throws Exception
*
* @deprecated Unused, may be removed in future versions of getID3
*/
public static function CopyFileParts($filename_source, $filename_dest, $offset, $length) {
if (!self::intValueSupported($offset + $length)) {
throw new Exception('cannot copy file portion, it extends beyond the '.round(PHP_INT_MAX / 1073741824).'GB limit');
}
if (is_readable($filename_source) && is_file($filename_source) && ($fp_src = fopen($filename_source, 'rb'))) {
if (($fp_dest = fopen($filename_dest, 'wb'))) {
if (fseek($fp_src, $offset) == 0) {
$byteslefttowrite = $length;
while (($byteslefttowrite > 0) && ($buffer = fread($fp_src, min($byteslefttowrite, getID3::FREAD_BUFFER_SIZE)))) {
$byteswritten = fwrite($fp_dest, $buffer, $byteslefttowrite);
$byteslefttowrite -= $byteswritten;
}
fclose($fp_dest);
return true;
} else {
fclose($fp_src);
throw new Exception('failed to seek to offset '.$offset.' in '.$filename_source);
}
} else {
throw new Exception('failed to create file for writing '.$filename_dest);
}
} else {
throw new Exception('failed to open file for reading '.$filename_source);
}
}
/**
* @param int $charval
*
* @return string
*/
public static function iconv_fallback_int_utf8($charval) {
if ($charval < 128) {
// 0bbbbbbb
$newcharstring = chr($charval);
} elseif ($charval < 2048) {
// 110bbbbb 10bbbbbb
$newcharstring = chr(($charval >> 6) | 0xC0);
$newcharstring .= chr(($charval & 0x3F) | 0x80);
} elseif ($charval < 65536) {
// 1110bbbb 10bbbbbb 10bbbbbb
$newcharstring = chr(($charval >> 12) | 0xE0);
$newcharstring .= chr(($charval >> 6) | 0xC0);
$newcharstring .= chr(($charval & 0x3F) | 0x80);
} else {
// 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
$newcharstring = chr(($charval >> 18) | 0xF0);
$newcharstring .= chr(($charval >> 12) | 0xC0);
$newcharstring .= chr(($charval >> 6) | 0xC0);
$newcharstring .= chr(($charval & 0x3F) | 0x80);
}
return $newcharstring;
}
/**
* ISO-8859-1 => UTF-8
*
* @param string $string
* @param bool $bom
*
* @return string
*/
public static function iconv_fallback_iso88591_utf8($string, $bom=false) {
$newcharstring = '';
if ($bom) {
$newcharstring .= "\xEF\xBB\xBF";
}
for ($i = 0; $i < strlen($string); $i++) {
$charval = ord($string[$i]);
$newcharstring .= self::iconv_fallback_int_utf8($charval);
}
return $newcharstring;
}
/**
* ISO-8859-1 => UTF-16BE
*
* @param string $string
* @param bool $bom
*
* @return string
*/
public static function iconv_fallback_iso88591_utf16be($string, $bom=false) {
$newcharstring = '';
if ($bom) {
$newcharstring .= "\xFE\xFF";
}
for ($i = 0; $i < strlen($string); $i++) {
$newcharstring .= "\x00".$string[$i];
}
return $newcharstring;
}
/**
* ISO-8859-1 => UTF-16LE
*
* @param string $string
* @param bool $bom
*
* @return string
*/
public static function iconv_fallback_iso88591_utf16le($string, $bom=false) {
$newcharstring = '';
if ($bom) {
$newcharstring .= "\xFF\xFE";
}
for ($i = 0; $i < strlen($string); $i++) {
$newcharstring .= $string[$i]."\x00";
}
return $newcharstring;
}
/**
* ISO-8859-1 => UTF-16LE (BOM)
*
* @param string $string
*
* @return string
*/
public static function iconv_fallback_iso88591_utf16($string) {
return self::iconv_fallback_iso88591_utf16le($string, true);
}
/**
* UTF-8 => ISO-8859-1
*
* @param string $string
*
* @return string
*/
public static function iconv_fallback_utf8_iso88591($string) {
$newcharstring = '';
$offset = 0;
$stringlength = strlen($string);
while ($offset < $stringlength) {
if ((ord($string[$offset]) | 0x07) == 0xF7) {
// 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
$charval = ((ord($string[($offset + 0)]) & 0x07) << 18) &
((ord($string[($offset + 1)]) & 0x3F) << 12) &
((ord($string[($offset + 2)]) & 0x3F) << 6) &
(ord($string[($offset + 3)]) & 0x3F);
$offset += 4;
} elseif ((ord($string[$offset]) | 0x0F) == 0xEF) {
// 1110bbbb 10bbbbbb 10bbbbbb
$charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) &
((ord($string[($offset + 1)]) & 0x3F) << 6) &
(ord($string[($offset + 2)]) & 0x3F);
$offset += 3;
} elseif ((ord($string[$offset]) | 0x1F) == 0xDF) {
// 110bbbbb 10bbbbbb
$charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) &
(ord($string[($offset + 1)]) & 0x3F);
$offset += 2;
} elseif ((ord($string[$offset]) | 0x7F) == 0x7F) {
// 0bbbbbbb
$charval = ord($string[$offset]);