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<?php
/**
* CFPropertyList
* {@link http://developer.apple.com/documentation/Darwin/Reference/ManPages/man5/plist.5.html Property Lists}
* @author Rodney Rehm <rodney.rehm@medialize.de>
* @author Christian Kruse <cjk@wwwtech.de>
* @package plist
* @version $Id$
*/
namespace CFPropertyList;
/**
* Facility for reading and writing binary PropertyLists. Ported from {@link http://www.opensource.apple.com/source/CF/CF-476.15/CFBinaryPList.c CFBinaryPList.c}.
* @author Rodney Rehm <rodney.rehm@medialize.de>
* @author Christian Kruse <cjk@wwwtech.de>
* @package plist
* @example example-read-02.php Read a Binary PropertyList
* @example example-read-03.php Read a PropertyList without knowing the type
*/
abstract class CFBinaryPropertyList {
/**
* Content of the plist (unparsed string)
* @var string
*/
protected $content = NULL;
/**
* position in the (unparsed) string
* @var integer
*/
protected $pos = 0;
/**
* Table containing uniqued objects
* @var array
*/
protected $uniqueTable = Array();
/**
* Number of objects in file
* @var integer
*/
protected $countObjects = 0;
/**
* The length of all strings in the file (byte length, not character length)
* @var integer
*/
protected $stringSize = 0;
/**
* The length of all ints in file (byte length)
* @var integer
*/
protected $intSize = 0;
/**
* The length of misc objects (i.e. not integer and not string) in file
* @var integer
*/
protected $miscSize = 0;
/**
* Number of object references in file (needed to calculate reference byte length)
* @var integer
*/
protected $objectRefs = 0;
/**
* Number of objects written during save phase; needed to calculate the size of the object table
* @var integer
*/
protected $writtenObjectCount = 0;
/**
* Table containing all objects in the file
*/
protected $objectTable = Array();
/**
* The size of object references
*/
protected $objectRefSize = 0;
/**
* The „offsets” (i.e. the different entries) in the file
*/
protected $offsets = Array();
/**
* Read a „null type” (filler byte, true, false, 0 byte)
* @param $length The byte itself
* @return the byte value (e.g. CFBoolean(true), CFBoolean(false), 0 or 15)
* @throws PListException on encountering an unknown null type
*/
protected function readBinaryNullType($length) {
switch($length) {
case 0: return 0; // null type
case 8: return new CFBoolean(false);
case 9: return new CFBoolean(true);
case 15: return 15; // fill type
}
throw new PListException("unknown null type: $length");
}
/**
* Create an 64 bit integer using bcmath or gmp
* @param int $hi The higher word
* @param int $lo The lower word
* @return mixed The integer (as int if possible, as string if not possible)
* @throws PListException if neither gmp nor bc available
*/
protected static function make64Int($hi,$lo) {
// on x64, we can just use int
if(PHP_INT_SIZE > 4) return (((int)$hi)<<32) | ((int)$lo);
// lower word has to be unsigned since we don't use bitwise or, we use bcadd/gmp_add
$lo = sprintf("%u", $lo);
// use GMP or bcmath if possible
if(function_exists("gmp_mul")) return gmp_strval(gmp_add(gmp_mul($hi, "4294967296"), $lo));
if(function_exists("bcmul")) return bcadd(bcmul($hi,"4294967296"), $lo);
if(class_exists('Math_BigInteger')) {
$bi = new \Math_BigInteger($hi);
return $bi->multiply(new \Math_BigInteger("4294967296"))->add(new \Math_BigInteger($lo))->toString();
}
throw new PListException("either gmp or bc has to be installed, or the Math_BigInteger has to be available!");
}
/**
* Read an integer value
* @param integer $length The length (in bytes) of the integer value, coded as „set bit $length to 1”
* @return CFNumber The integer value
* @throws PListException if integer val is invalid
* @throws IOException if read error occurs
* @uses make64Int() to overcome PHP's big integer problems
*/
protected function readBinaryInt($length) {
if($length > 3) throw new PListException("Integer greater than 8 bytes: $length");
$nbytes = 1 << $length;
$val = null;
if(strlen($buff = substr($this->content, $this->pos, $nbytes)) != $nbytes) throw IOException::readError("");
$this->pos += $nbytes;
switch($length) {
case 0:
$val = unpack("C", $buff);
$val = $val[1];
break;
case 1:
$val = unpack("n", $buff);
$val = $val[1];
break;
case 2:
$val = unpack("N", $buff);
$val = $val[1];
break;
case 3:
$words = unpack("Nhighword/Nlowword",$buff);
//$val = $words['highword'] << 32 | $words['lowword'];
$val = self::make64Int($words['highword'],$words['lowword']);
break;
}
return new CFNumber($val);
}
/**
* Read a real value
* @param integer $length The length (in bytes) of the integer value, coded as „set bit $length to 1”
* @return CFNumber The real value
* @throws PListException if real val is invalid
* @throws IOException if read error occurs
*/
protected function readBinaryReal($length) {
if($length > 3) throw new PListException("Real greater than 8 bytes: $length");
$nbytes = 1 << $length;
$val = null;
if(strlen($buff = substr($this->content,$this->pos, $nbytes)) != $nbytes) throw IOException::readError("");
$this->pos += $nbytes;
switch($length) {
case 0: // 1 byte float? must be an error
case 1: // 2 byte float? must be an error
$x = $length + 1;
throw new PListException("got {$x} byte float, must be an error!");
case 2:
$val = unpack("f", strrev($buff));
$val = $val[1];
break;
case 3:
$val = unpack("d", strrev($buff));
$val = $val[1];
break;
}
return new CFNumber($val);
}
/**
* Read a date value
* @param integer $length The length (in bytes) of the integer value, coded as „set bit $length to 1”
* @return CFDate The date value
* @throws PListException if date val is invalid
* @throws IOException if read error occurs
*/
protected function readBinaryDate($length) {
if($length > 3) throw new PListException("Date greater than 8 bytes: $length");
$nbytes = 1 << $length;
$val = null;
if(strlen($buff = substr($this->content, $this->pos, $nbytes)) != $nbytes) throw IOException::readError("");
$this->pos += $nbytes;
switch($length) {
case 0: // 1 byte CFDate is an error
case 1: // 2 byte CFDate is an error
$x = $length + 1;
throw new PListException("{$x} byte CFdate, error");
case 2:
$val = unpack("f", strrev($buff));
$val = $val[1];
break;
case 3:
$val = unpack("d", strrev($buff));
$val = $val[1];
break;
}
return new CFDate($val,CFDate::TIMESTAMP_APPLE);
}
/**
* Read a data value
* @param integer $length The length (in bytes) of the integer value, coded as „set bit $length to 1”
* @return CFData The data value
* @throws IOException if read error occurs
*/
protected function readBinaryData($length) {
if($length == 0) $buff = "";
else {
$buff = substr($this->content, $this->pos, $length);
if(strlen($buff) != $length) throw IOException::readError("");
$this->pos += $length;
}
return new CFData($buff,false);
}
/**
* Read a string value, usually coded as utf8
* @param integer $length The length (in bytes) of the string value
* @return CFString The string value, utf8 encoded
* @throws IOException if read error occurs
*/
protected function readBinaryString($length) {
if($length == 0) $buff = "";
else {
if(strlen($buff = substr($this->content, $this->pos, $length)) != $length) throw IOException::readError("");
$this->pos += $length;
}
if(!isset($this->uniqueTable[$buff])) $this->uniqueTable[$buff] = true;
return new CFString($buff);
}
/**
* Convert the given string from one charset to another.
* Trying to use MBString, Iconv, Recode - in that particular order.
* @param string $string the string to convert
* @param string $fromCharset the charset the given string is currently encoded in
* @param string $toCharset the charset to convert to, defaults to UTF-8
* @return string the converted string
* @throws PListException on neither MBString, Iconv, Recode being available
*/
public static function convertCharset($string, $fromCharset, $toCharset='UTF-8') {
if(function_exists('mb_convert_encoding')) return mb_convert_encoding($string, $toCharset, $fromCharset);
if(function_exists('iconv')) return iconv($fromCharset, $toCharset, $string);
if(function_exists('recode_string')) return recode_string($fromCharset .'..'. $toCharset, $string);
throw new PListException('neither iconv nor mbstring supported. how are we supposed to work on strings here?');
}
/**
* Count characters considering character set
* Trying to use MBString, Iconv - in that particular order.
* @param string $string the string to convert
* @param string $charset the charset the given string is currently encoded in
* @return integer The number of characters in that string
* @throws PListException on neither MBString, Iconv being available
*/
public static function charsetStrlen($string,$charset="UTF-8") {
if(function_exists('mb_strlen')) return mb_strlen($string, $charset);
if(function_exists('iconv_strlen')) return iconv_strlen($string,$charset);
throw new PListException('neither iconv nor mbstring supported. how are we supposed to work on strings here?');
}
/**
* Read a unicode string value, coded as UTF-16BE
* @param integer $length The length (in bytes) of the string value
* @return CFString The string value, utf8 encoded
* @throws IOException if read error occurs
*/
protected function readBinaryUnicodeString($length) {
/* The problem is: we get the length of the string IN CHARACTERS;
since a char in UTF-16 can be 16 or 32 bit long, we don't really know
how long the string is in bytes */
if(strlen($buff = substr($this->content, $this->pos, 2*$length)) != 2*$length) throw IOException::readError("");
$this->pos += 2 * $length;
if(!isset($this->uniqueTable[$buff])) $this->uniqueTable[$buff] = true;
return new CFString(self::convertCharset($buff, "UTF-16BE", "UTF-8"));
}
/**
* Read an array value, including contained objects
* @param integer $length The number of contained objects
* @return CFArray The array value, including the objects
* @throws IOException if read error occurs
*/
protected function readBinaryArray($length) {
$ary = new CFArray();
// first: read object refs
if($length != 0) {
if(strlen($buff = substr($this->content, $this->pos, $length * $this->objectRefSize)) != $length * $this->objectRefSize) throw IOException::readError("");
$this->pos += $length * $this->objectRefSize;
$objects = self::unpackWithSize($this->objectRefSize, $buff);
// now: read objects
for($i=0;$i<$length;++$i) {
$object = $this->readBinaryObjectAt($objects[$i+1]+1);
$ary->add($object);
}
}
return $ary;
}
/**
* Read a dictionary value, including contained objects
* @param integer $length The number of contained objects
* @return CFDictionary The dictionary value, including the objects
* @throws IOException if read error occurs
*/
protected function readBinaryDict($length) {
$dict = new CFDictionary();
// first: read keys
if($length != 0) {
if(strlen($buff = substr($this->content, $this->pos, $length * $this->objectRefSize)) != $length * $this->objectRefSize) throw IOException::readError("");
$this->pos += $length * $this->objectRefSize;
$keys = self::unpackWithSize($this->objectRefSize, $buff);
// second: read object refs
if(strlen($buff = substr($this->content, $this->pos, $length * $this->objectRefSize)) != $length * $this->objectRefSize) throw IOException::readError("");
$this->pos += $length * $this->objectRefSize;
$objects = self::unpackWithSize($this->objectRefSize, $buff);
// read real keys and objects
for($i=0;$i<$length;++$i) {
$key = $this->readBinaryObjectAt($keys[$i+1]+1);
$object = $this->readBinaryObjectAt($objects[$i+1]+1);
$dict->add($key->getValue(),$object);
}
}
return $dict;
}
/**
* Read an object type byte, decode it and delegate to the correct reader function
* @return mixed The value of the delegate reader, so any of the CFType subclasses
* @throws IOException if read error occurs
*/
function readBinaryObject() {
// first: read the marker byte
if(strlen($buff = substr($this->content,$this->pos,1)) != 1) throw IOException::readError("");
$this->pos++;
$object_length = unpack("C*", $buff);
$object_length = $object_length[1] & 0xF;
$buff = unpack("H*", $buff);
$buff = $buff[1];
$object_type = substr($buff, 0, 1);
if($object_type != "0" && $object_length == 15) {
$object_length = $this->readBinaryObject($this->objectRefSize);
$object_length = $object_length->getValue();
}
$retval = null;
switch($object_type) {
case '0': // null, false, true, fillbyte
$retval = $this->readBinaryNullType($object_length);
break;
case '1': // integer
$retval = $this->readBinaryInt($object_length);
break;
case '2': // real
$retval = $this->readBinaryReal($object_length);
break;
case '3': // date
$retval = $this->readBinaryDate($object_length);
break;
case '4': // data
$retval = $this->readBinaryData($object_length);
break;
case '5': // byte string, usually utf8 encoded
$retval = $this->readBinaryString($object_length);
break;
case '6': // unicode string (utf16be)
$retval = $this->readBinaryUnicodeString($object_length);
break;
case '8':
$num = $this->readBinaryInt($object_length);
$retval = new CFUid($num->getValue());
break;
case 'a': // array
$retval = $this->readBinaryArray($object_length);
break;
case 'd': // dictionary
$retval = $this->readBinaryDict($object_length);
break;
}
return $retval;
}
/**
* Read an object type byte at position $pos, decode it and delegate to the correct reader function
* @param integer $pos The table position in the offsets table
* @return mixed The value of the delegate reader, so any of the CFType subclasses
*/
function readBinaryObjectAt($pos) {
$this->pos = $this->offsets[$pos];
return $this->readBinaryObject();
}
/**
* Parse a binary plist string
* @return void
* @throws IOException if read error occurs
*/
public function parseBinaryString() {
$this->uniqueTable = Array();
$this->countObjects = 0;
$this->stringSize = 0;
$this->intSize = 0;
$this->miscSize = 0;
$this->objectRefs = 0;
$this->writtenObjectCount = 0;
$this->objectTable = Array();
$this->objectRefSize = 0;
$this->offsets = Array();
// first, we read the trailer: 32 byte from the end
$buff = substr($this->content,-32);
if(strlen($buff) < 32) {
throw new PListException('Error in PList format: content is less than at least necessary 32 bytes!');
}
$infos = unpack("x6/Coffset_size/Cobject_ref_size/x4/Nnumber_of_objects/x4/Ntop_object/x4/Ntable_offset",$buff);
// after that, get the offset table
$coded_offset_table = substr($this->content,$infos['table_offset'],$infos['number_of_objects'] * $infos['offset_size']);
if(strlen($coded_offset_table) != $infos['number_of_objects'] * $infos['offset_size']) throw IOException::readError("");
$this->countObjects = $infos['number_of_objects'];
// decode offset table
$formats = Array("","C*","n*",NULL,"N*");
if($infos['offset_size'] == 3) { # since PHP does not support parenthesis in pack/unpack expressions,
# "(H6)*" does not work and we have to work round this by repeating the
# expression as often as it fits in the string
$this->offsets = array(NULL);
while($coded_offset_table) {
$str = unpack("H6",$coded_offset_table);
$this->offsets[] = hexdec($str[1]);
$coded_offset_table = substr($coded_offset_table,3);
}
}
else $this->offsets = unpack($formats[$infos['offset_size']],$coded_offset_table);
$this->uniqueTable = Array();
$this->objectRefSize = $infos['object_ref_size'];
$top = $this->readBinaryObjectAt($infos['top_object']+1);
$this->add($top);
}
/**
* Read a binary plist stream
* @param resource $stream The stream to read
* @return void
* @throws IOException if read error occurs
*/
function readBinaryStream($stream) {
if(($str = stream_get_contents($stream)) === false || empty($str)) {
throw new PListException("Error reading stream!");
}
$this->parseBinary($str);
}
/**
* parse a binary plist string
* @param string $content The stream to read, defaults to {@link $this->content}
* @return void
* @throws IOException if read error occurs
*/
function parseBinary($content=NULL) {
if($content !== NULL) {
$this->content = $content;
}
if(empty($this->content)) {
throw new PListException("Content may not be empty!");
}
if(substr($this->content,0,8) != 'bplist00') {
throw new PListException("Invalid binary string!");
}
$this->pos = 0;
$this->parseBinaryString();
}
/**
* Read a binary plist file
* @param string $file The file to read
* @return void
* @throws IOException if read error occurs
*/
function readBinary($file) {
if(!($fd = fopen($file,"rb"))) {
throw new IOException("Could not open file {$file}!");
}
$this->readBinaryStream($fd);
fclose($fd);
}
/**
* calculate the bytes needed for a size integer value
* @param integer $int The integer value to calculate
* @return integer The number of bytes needed
*/
public static function bytesSizeInt($int) {
$nbytes = 0;
if($int > 0xE) $nbytes += 2; // 2 size-bytes
if($int > 0xFF) $nbytes += 1; // 3 size-bytes
if($int > 0xFFFF) $nbytes += 2; // 5 size-bytes
return $nbytes;
}
/**
* Calculate the byte needed for a „normal” integer value
* @param integer $int The integer value
* @return integer The number of bytes needed + 1 (because of the „marker byte”)
*/
public static function bytesInt($int) {
$nbytes = 1;
if($int > 0xFF) $nbytes += 1; // 2 byte integer
if($int > 0xFFFF) $nbytes += 2; // 4 byte integer
if($int > 0xFFFFFFFF) $nbytes += 4; // 8 byte integer
if($int < 0) $nbytes += 7; // 8 byte integer (since it is signed)
return $nbytes + 1; // one „marker” byte
}
/**
* „pack” a value (i.e. write the binary representation as big endian to a string) with the specified size
* @param integer $nbytes The number of bytes to pack
* @param integer $int The integer value to pack
* @return string The packed value as string
*/
public static function packItWithSize($nbytes,$int) {
$formats = Array("C", "n", "N", "N");
$format = $formats[$nbytes-1];
if($nbytes == 3) return substr(pack($format, $int), -3);
return pack($format, $int);
}
/**
* „unpack” multiple values of the specified size (i.e. get the integers from their binary representation) from a string
* @param integer $nbytes The number of bytes of each value to unpack
* @param integer $buff The string packed with integer values
* @return array The unpacked integers
*/
public static function unpackWithSize($nbytes,$buff) {
$formats = Array("C*", "n*", "N*", "N*");
$format = $formats[$nbytes-1];
if($nbytes == 3) $buff = "\0" . implode("\0", str_split($buff, 3));
return unpack($format, $buff);
}
/**
* Calculate the bytes needed to save the number of objects
* @param integer $count_objects The number of objects
* @return integer The number of bytes
*/
public static function bytesNeeded($count_objects) {
$nbytes = 0;
while($count_objects >= 1) {
$nbytes++;
$count_objects /= 256;
}
return $nbytes;
}
/**
* Code an integer to byte representation
* @param integer $int The integer value
* @return string The packed byte value
*/
public static function intBytes($int) {
$intbytes = "";
if($int > 0xFFFF) $intbytes = "\x12".pack("N", $int); // 4 byte integer
elseif($int > 0xFF) $intbytes = "\x11".pack("n", $int); // 2 byte integer
else $intbytes = "\x10".pack("C", $int); // 8 byte integer
return $intbytes;
}
/**
* Code an type byte, consisting of the type marker and the length of the type
* @param string $type The type byte value (i.e. "d" for dictionaries)
* @param integer $type_len The length of the type
* @return string The packed type byte value
*/
public static function typeBytes($type,$type_len) {
$optional_int = "";
if($type_len < 15) $type .= sprintf("%x", $type_len);
else {
$type .= "f";
$optional_int = self::intBytes($type_len);
}
return pack("H*", $type).$optional_int;
}
/**
* Count number of objects and create a unique table for strings
* @param $value The value to count and unique
* @return void
*/
protected function uniqueAndCountValues($value) {
// no uniquing for other types than CFString and CFData
if($value instanceof CFNumber) {
$val = $value->getValue();
if(intval($val) == $val && !is_float($val) && strpos($val,'.') === false) $this->intSize += self::bytesInt($val);
else $this->miscSize += 9; // 9 bytes (8 + marker byte) for real
$this->countObjects++;
return;
}
elseif($value instanceof CFDate) {
$this->miscSize += 9; // since date in plist is real, we need 9 byte (8 + marker byte)
$this->countObjects++;
return;
}
elseif($value instanceof CFBoolean) {
$this->countObjects++;
$this->miscSize += 1;
return;
}
elseif($value instanceof CFArray) {
$cnt = 0;
foreach($value as $v) {
++$cnt;
$this->uniqueAndCountValues($v);
$this->objectRefs++; // each array member is a ref
}
$this->countObjects++;
$this->intSize += self::bytesSizeInt($cnt);
$this->miscSize++; // marker byte for array
return;
}
elseif($value instanceof CFDictionary) {
$cnt = 0;
foreach($value as $k => $v) {
++$cnt;
if(!isset($this->uniqueTable[$k])) {
$this->uniqueTable[$k] = 0;
$len = self::binaryStrlen($k);
$this->stringSize += $len + 1;
$this->intSize += self::bytesSizeInt(self::charsetStrlen($k,'UTF-8'));
}
$this->objectRefs += 2; // both, key and value, are refs
$this->uniqueTable[$k]++;
$this->uniqueAndCountValues($v);
}
$this->countObjects++;
$this->miscSize++; // marker byte for dict
$this->intSize += self::bytesSizeInt($cnt);
return;
}
elseif($value instanceOf CFData) {
$val = $value->getValue();
$len = strlen($val);
$this->intSize += self::bytesSizeInt($len);
$this->miscSize += $len + 1;
$this->countObjects++;
return;
}
else $val = $value->getValue();
if(!isset($this->uniqueTable[$val])) {
$this->uniqueTable[$val] = 0;
$len = self::binaryStrlen($val);
$this->stringSize += $len + 1;
$this->intSize += self::bytesSizeInt(self::charsetStrlen($val,'UTF-8'));
}
$this->uniqueTable[$val]++;
}
/**
* Convert CFPropertyList to binary format; since we have to count our objects we simply unique CFDictionary and CFArray
* @return string The binary plist content
*/
public function toBinary() {
$this->uniqueTable = Array();
$this->countObjects = 0;
$this->stringSize = 0;
$this->intSize = 0;
$this->miscSize = 0;
$this->objectRefs = 0;
$this->writtenObjectCount = 0;
$this->objectTable = Array();
$this->objectRefSize = 0;
$this->offsets = Array();
$binary_str = "bplist00";
$value = $this->getValue(true);
$this->uniqueAndCountValues($value);
$this->countObjects += count($this->uniqueTable);
$this->objectRefSize = self::bytesNeeded($this->countObjects);
$file_size = $this->stringSize + $this->intSize + $this->miscSize + $this->objectRefs * $this->objectRefSize + 40;
$offset_size = self::bytesNeeded($file_size);
$table_offset = $file_size - 32;
$this->objectTable = Array();
$this->writtenObjectCount = 0;
$this->uniqueTable = Array(); // we needed it to calculate several values
$value->toBinary($this);
$object_offset = 8;
$offsets = Array();
for($i=0;$i<count($this->objectTable);++$i) {
$binary_str .= $this->objectTable[$i];
$offsets[$i] = $object_offset;
$object_offset += strlen($this->objectTable[$i]);
}
for($i=0;$i<count($offsets);++$i) {
$binary_str .= self::packItWithSize($offset_size, $offsets[$i]);
}
$binary_str .= pack("x6CC", $offset_size, $this->objectRefSize);
$binary_str .= pack("x4N", $this->countObjects);
$binary_str .= pack("x4N", 0);
$binary_str .= pack("x4N", $table_offset);
return $binary_str;
}
/**
* Counts the number of bytes the string will have when coded; utf-16be if non-ascii characters are present.
* @param string $val The string value
* @return integer The length of the coded string in bytes
*/
protected static function binaryStrlen($val) {
for($i=0;$i<strlen($val);++$i) {
if(ord($val[$i]) >= 128) {
$val = self::convertCharset($val, 'UTF-8', 'UTF-16BE');
return strlen($val);
}
}
return strlen($val);
}
/**
* Uniques and transforms a string value to binary format and adds it to the object table
* @param string $val The string value
* @return integer The position in the object table
*/
public function stringToBinary($val) {
$saved_object_count = -1;
if(!isset($this->uniqueTable[$val])) {
$saved_object_count = $this->writtenObjectCount++;
$this->uniqueTable[$val] = $saved_object_count;
$utf16 = false;
for($i=0;$i<strlen($val);++$i) {
if(ord($val[$i]) >= 128) {
$utf16 = true;
break;
}
}
if($utf16) {
$bdata = self::typeBytes("6", mb_strlen($val,'UTF-8')); // 6 is 0110, unicode string (utf16be)
$val = self::convertCharset($val, 'UTF-8', 'UTF-16BE');
$this->objectTable[$saved_object_count] = $bdata.$val;
}
else {
$bdata = self::typeBytes("5", strlen($val)); // 5 is 0101 which is an ASCII string (seems to be ASCII encoded)
$this->objectTable[$saved_object_count] = $bdata.$val;
}
}
else $saved_object_count = $this->uniqueTable[$val];
return $saved_object_count;
}
/**
* Codes an integer to binary format
* @param integer $value The integer value
* @return string the coded integer
*/
protected function intToBinary($value) {
$nbytes = 0;
if($value > 0xFF) $nbytes = 1; // 1 byte integer
if($value > 0xFFFF) $nbytes += 1; // 4 byte integer
if($value > 0xFFFFFFFF) $nbytes += 1; // 8 byte integer
if($value < 0) $nbytes = 3; // 8 byte integer, since signed
$bdata = self::typeBytes("1", $nbytes); // 1 is 0001, type indicator for integer
$buff = "";
if($nbytes < 3) {
if($nbytes == 0) $fmt = "C";
elseif($nbytes == 1) $fmt = "n";
else $fmt = "N";
$buff = pack($fmt, $value);
}
else {
if(PHP_INT_SIZE > 4) {
// 64 bit signed integer; we need the higher and the lower 32 bit of the value
$high_word = $value >> 32;
$low_word = $value & 0xFFFFFFFF;
}
else {
// since PHP can only handle 32bit signed, we can only get 32bit signed values at this point - values above 0x7FFFFFFF are
// floats. So we ignore the existance of 64bit on non-64bit-machines
if($value < 0) $high_word = 0xFFFFFFFF;
else $high_word = 0;
$low_word = $value;
}
$buff = pack("N", $high_word).pack("N", $low_word);
}
return $bdata.$buff;
}
/**
* Codes a real value to binary format
* @param float $val The real value
* @return string The coded real
*/
protected function realToBinary($val) {
$bdata = self::typeBytes("2", 3); // 2 is 0010, type indicator for reals
return $bdata.strrev(pack("d", (float)$val));
}
public function uidToBinary($value) {
$saved_object_count = $this->writtenObjectCount++;
$val = "";
$nbytes = 0;
if($value > 0xFF) $nbytes = 1; // 1 byte integer
if($value > 0xFFFF) $nbytes += 1; // 4 byte integer
if($value > 0xFFFFFFFF) $nbytes += 1; // 8 byte integer
if($value < 0) $nbytes = 3; // 8 byte integer, since signed
$bdata = self::typeBytes("1000", $nbytes); // 1 is 0001, type indicator for integer
$buff = "";
if($nbytes < 3) {
if($nbytes == 0) $fmt = "C";
elseif($nbytes == 1) $fmt = "n";
else $fmt = "N";
$buff = pack($fmt, $value);
}
else {
if(PHP_INT_SIZE > 4) {
// 64 bit signed integer; we need the higher and the lower 32 bit of the value
$high_word = $value >> 32;
$low_word = $value & 0xFFFFFFFF;
}
else {
// since PHP can only handle 32bit signed, we can only get 32bit signed values at this point - values above 0x7FFFFFFF are
// floats. So we ignore the existance of 64bit on non-64bit-machines
if($value < 0) $high_word = 0xFFFFFFFF;
else $high_word = 0;
$low_word = $value;
}
$buff = pack("N", $high_word).pack("N", $low_word);
}
$val = $bdata.$buff;
$this->objectTable[$saved_object_count] = $val;
return $saved_object_count;
}
/**
* Converts a numeric value to binary and adds it to the object table
* @param numeric $value The numeric value
* @return integer The position in the object table
*/
public function numToBinary($value) {
$saved_object_count = $this->writtenObjectCount++;
$val = "";
if(intval($value) == $value && !is_float($value) && strpos($value,'.') === false) $val = $this->intToBinary($value);
else $val = $this->realToBinary($value);
$this->objectTable[$saved_object_count] = $val;
return $saved_object_count;
}
/**
* Convert date value (apple format) to binary and adds it to the object table
* @param integer $value The date value
* @return integer The position of the coded value in the object table
*/
public function dateToBinary($val) {
$saved_object_count = $this->writtenObjectCount++;
$hour = gmdate("H",$val);
$min = gmdate("i",$val);
$sec = gmdate("s",$val);
$mday = gmdate("j",$val);
$mon = gmdate("n",$val);
$year = gmdate("Y",$val);
$val = gmmktime($hour,$min,$sec,$mon,$mday,$year) - CFDate::DATE_DIFF_APPLE_UNIX; // CFDate is a real, number of seconds since 01/01/2001 00:00:00 GMT
$bdata = self::typeBytes("3", 3); // 3 is 0011, type indicator for date
$this->objectTable[$saved_object_count] = $bdata.strrev(pack("d", $val));
return $saved_object_count;
}
/**
* Convert a bool value to binary and add it to the object table
* @param bool $val The boolean value
* @return integer The position in the object table
*/
public function boolToBinary($val) {
$saved_object_count = $this->writtenObjectCount++;
$this->objectTable[$saved_object_count] = $val ? "\x9" : "\x8"; // 0x9 is 1001, type indicator for true; 0x8 is 1000, type indicator for false
return $saved_object_count;
}
/**
* Convert data value to binary format and add it to the object table
* @param string $val The data value
* @return integer The position in the object table
*/
public function dataToBinary($val) {
$saved_object_count = $this->writtenObjectCount++;
$bdata = self::typeBytes("4", strlen($val)); // a is 1000, type indicator for data
$this->objectTable[$saved_object_count] = $bdata.$val;
return $saved_object_count;
}
/**
* Convert array to binary format and add it to the object table
* @param CFArray $val The array to convert
* @return integer The position in the object table
*/
public function arrayToBinary($val) {
$saved_object_count = $this->writtenObjectCount++;
$bdata = self::typeBytes("a", count($val->getValue())); // a is 1010, type indicator for arrays
foreach($val as $v) {
$bval = $v->toBinary($this);
$bdata .= self::packItWithSize($this->objectRefSize, $bval);
}
$this->objectTable[$saved_object_count] = $bdata;
return $saved_object_count;
}
/**
* Convert dictionary to binary format and add it to the object table
* @param CFDictionary $val The dict to convert
* @return integer The position in the object table
*/
public function dictToBinary($val) {
$saved_object_count = $this->writtenObjectCount++;
$bdata = self::typeBytes("d", count($val->getValue())); // d=1101, type indicator for dictionary
foreach($val as $k => $v) {
$str = new CFString($k);
$key = $str->toBinary($this);
$bdata .= self::packItWithSize($this->objectRefSize, $key);
}
foreach($val as $k => $v) {
$bval = $v->toBinary($this);
$bdata .= self::packItWithSize($this->objectRefSize, $bval);
}
$this->objectTable[$saved_object_count] = $bdata;
return $saved_object_count;
}
}
# eof