penguin/utils
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utils/deprecated/php/ByteArray.php

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<?php
class ERROR {
const INVALID_DATA = 1;
const UNDEFINED_DATA = 2;
const TYPE_MISSMATCH = 3;
const READ_ONLY = 11;
const GREATER_COMPARATIVE = 21;
const EOF = 100;
function __construct($type, $a, $b)
{
throw new Exception($type);
}
}
class ByteArray extends ArrayObject {
private $position = 0;
public function ByteArray($str = NULL) {
if(is_string($str)) {
$length = strlen($str);
for($i = 0; $i < $length; $i ++)
$this[] = ord($str[$i]);
}
}
//<editor-fold defaultstate="collapsed" desc="Cryptographic">
public function encrypt() {
}
public function decrypt() {
}
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc="GET,SET,OFFSET.SET">
public function __get($prop) {
switch($prop) {
case 'length':
return count($this);
break;
case 'position':
return $this->position;
break;
case 'byteAvailable' :
return count($this) - $this->position;
break;
default :
return "Property($prop) is undefined";
}
}
public function __set($prop, $val) {
try {
switch ($prop) {
case 'length':
if (is_int($val)) {
$l = count($this);
if ($val < $l) {
if ($val > -1) {
while ($val < count($this)) {
$this->offsetUnset(count($this) - 1);
}
} else {
new ERROR(ERROR::INVALID_DATA, "length($val)");
}
} else {
while (count($this) < $val)
$this[] = 0;
}
} else {
new ERROR(ERROR::TYPE_MISSMATCH, "($val)", 'an integer');
}
break;
case 'position':
if (is_int($val)) {
$l = count($this);
if ($val < $l) {
if ($val > -1) {
$this->position = $val;
} else {
new ERROR(ERROR::INVALID_DATA, "length($val)");
}
} else {
new ERROR(ERROR::GREATER_COMPARATIVE, "Position($val)", "length($l)");
}
} else {
new ERROR(ERROR::TYPE_MISSMATCH, "($val)", 'an integer');
}
break;
case 'byteAvailable' :
new ERROR(ERROR::READ_ONLY, "Property($prop)");
break;
default :
new ERROR(ERROR::UNDEFINED_DATA, "property($prop)");
}
} catch(Exception $e) {
echo $e;
}
}
public function offsetSet($i, $val) {
try {
if(is_int($val)) {
if($i > -1) {
while(count($this) < $i)
$this[] = 0;
parent::offsetSet($i, $val & 0xff);
} else if($i == NULL) {
parent::offsetSet(count($this), $val & 0xff);
} else {
new ERROR(ERROR::TYPE_MISSMATCH, "index($val)");
}
} else {
new ERROR(ERROR::TYPE_MISSMATCH, "($val)", 'an integer');
}
} catch(Exception $e) {
echo $e;
}
}
//</editor-fold>
public function compress() {
$str = gzcompress($this->save());
$this->clear();
$this->ByteArray($str);
}
public function deflate() {
$str = gzuncompress($this->save());
$this->clear();
$this->ByteArray($str);
}
public function save() {
$str = '';
foreach($this as $i)
$str .= chr($i);
return $str;
}
public function clear() {
$this->length = 0;
$this->position = 0;
}
// <editor-fold defaultstate="collapsed" desc="ReadUtils">
public function readBoolean() {
$p = $this->getPos();
if ($p)
return (bool) $this[$p];
else
return NULL;
}
public function readByte() {
//Returns -128 ~ 127
$p = $this->getPos();
if(is_int($p)) {
$p = $this[$p];
return $p < 128 ? $p : $p - 256;
}
return NULL;
}
public function readBytes(ByteArray $b, $p = 0, $l = 0) {
try {
if (($this->position + $l) < count($this)) {
if ($l > 0 || ($l = count($this))) {
for ($i = 0; $i < $l; $i++)
$b[$p + $i] = $this->readByte();
} else {
new ERROR(ERROR::UNDEFINED_DATA);
}
} else {
new ERROR(ERROR::EOF);
}
} catch (Exception $e) {
echo $e;
}
}
public function readDouble() {
//Reads an IEEE 754 double-precision (64-bit) floating-point number from the byte stream.
$s = $this->tobin($this->readByte())
.$this->tobin($this->readByte())
.$this->tobin($this->readByte())
.$this->tobin($this->readByte())
.$this->tobin($this->readByte())
.$this->tobin($this->readByte())
.$this->tobin($this->readByte())
.$this->tobin($this->readByte());
if($s*1 == 0)
return 0;
return $this->decodeIEEE($s);
}
public function readFloat() {
//Reads an IEEE 754 single-precision (32-bit) floating-point number from the byte stream.
$s = $this->tobin($this->readByte())
.$this->tobin($this->readByte())
.$this->tobin($this->readByte())
.$this->tobin($this->readByte());
if($s*1 == 0)
return 0;
return $this->decodeIEEE($s);
}
public function readInt() {
//Returns -2147483648 ~ 2147483647
if(($s = hexdec($this->tohex($this->readByte())
.$this->tohex($this->readByte())
.$this->tohex($this->readByte())
.$this->tohex($this->readByte())))
> 2147483647)
$s -= 4294967296;
return $s;
}
public function readMultiByte($length, $charSet) {
}
public function readShort() {
if(($s = hexdec($this->tohex($this->readByte())
.$this->tohex($this->readByte())))
> 32767)
$s -= 65536;
return $s;
}
public function readUnsignedByte() {
return hexdec($this->tohex($this->readByte()));
}
public function readUnsignedInt() {
return hexdec($this->tohex($this->readByte())
.$this->tohex($this->readByte())
.$this->tohex($this->readByte())
.$this->tohex($this->readByte()));
}
public function readUnsignedShort() {
return hexdec($this->tohex($this->readByte())
.$this->tohex($this->readByte())
.$this->tohex($this->readByte())
.$this->tohex($this->readByte()));
}
public function readUTF() {
}
public function readUTFBytes() {
}
// </editor-fold>
// <editor-fold defaultstate="collapsed" desc="WriteUtils">
public function writeBoolean($b) {
try {
if (is_bool($b)) {
new ERROR(ERROR::TYPE_MISSMATCH, "($b)");
} else {
if ($this->position < count($this))
$b ? ($this[$this->getPos()] = 1) : ($this[$this->getPos()] = 0);
else
$b ? ($this[] = 1) : ($this[] = 0);
}
} catch (Exception $e) {
echo $e;
}
}
public function writeByte($b) {
if($this->position < count($this)) {
$this[$this->getPos()] = $b;
} else {
$this[] = $b;
$this->getPos();
}
}
public function writeBytes(ByteArray $b, $p = 0, $l = 0) {
try {
if ($l > 0 || ($l = count($b))) {
for ($i = 0; $i < $l; $i++)
$this->writeByte($b[$p + $i]);
} else {
new ERROR(ERROR::UNDEFINED_DATA);
}
} catch (Exception $e) {
echo $e;
}
}
public function writeDouble($num) {
if($num == 0) {
$num = str_pad('', 64, '0');
} else {
$num = $this->encodeIEEE($num, 8)."\n";
}
for($i = 0; $i < 64; $i += 8)
$this->writeByte(bindec(substr($num, $i, 8)));
}
public function writeFloat($num) {
if($num == 0) {
$num = str_pad('', 32, '0');
} else {
$num = $this->encodeIEEE($num, 4)."\n";
}
for($i = 0; $i < 32; $i += 8)
$this->writeByte(bindec(substr($num, $i, 8)));
}
public function writeInt($num) {
$this->writeByte($num >> 24 & 0xFF);
$this->writeByte($num >> 16 & 0xFF);
$this->writeByte($num >> 8 & 0xFF);
$this->writeByte($num & 0xFF);
}
public function writeMultiByte($length, $charSet) {
}
public function writeShort($num) {
$this->writeByte($num >> 8 & 0xFF);
$this->writeByte($num & 0xFF);
}
public function writeUnsignedInt($num) {
$this->writeByte($num >> 56 & 0xFF);
$this->writeByte($num >> 48 & 0xFF);
$this->writeByte($num >> 40 & 0xFF);
$this->writeByte($num >> 32 & 0xFF);
$this->writeByte($num >> 24 & 0xFF);
$this->writeByte($num >> 16 & 0xFF);
$this->writeByte($num >> 8 & 0xFF);
$this->writeByte($num & 0xFF);
}
public function writeUTF() {
}
public function writeUTFBytes() {
}
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc="IEEE convertions">
private function decodeIEEE($str) {
$s = $str[0] ? -1:1;
if(($l = strlen($str)) == 8) {
$e = bindec(substr($str, 1, 3)) - 3;
$m = substr($str, 4, 8);
} else if($l == 16) {
} else if($l == 32) {
$e = bindec(substr($str, 1, 8)) - 127;
$m = '1'.substr($str, 9, 32);
} else if($l == 64) {
$e = bindec(substr($str, 1, 11)) - 1023;
$m = '1'.substr($str, 12, 64);
}
if((++ $e) > 0) {
$m1 = substr($m, 0, $e);
$m2 = substr($m, $e);
} else {
while($e < 0) {
$m = '0'.$m;
$e ++;
}
$m1 = 0;
$m2 = $m;
}
$str = 0;
$e = strlen($m1);
for($i = 0; $i < $e; $i ++) {
if($m1[$i]) {
$str += $m1[$i]*pow(2, ($e - 1) - $i);
}
}
$e = strlen($m2);
for($i = 0; $i < $e; $i ++) {
if($m2[$i]) {
$str += $m2[$i]*pow(2, -($i + 1));
}
}
return $str*$s;
}
private function encodeIEEE($num, $byte) {
try {
if(is_numeric($num)) {
$s = $num > 0 ? 0:1;
$m1 = $s ? -1*$num : 1*$num;
$num = explode('.', $num);
$m1 = $num[0]*1;
if(count($num) > 1)
$m2 = '0.'.$num[1];
else $m2 = '0';
if($byte == 1) {
} else if($byte == 2) {
} else if($byte == 4) {
$e = 8;
$f = 23;
$b = 127;
} else if($byte == 8) {
$e = 11;
$f = 52;
$b = 1023;
} else {
new ERROR(ERROR::INVALID_DATA, "byte($byte)");
}
$num = '';
if($m1 > 1) {
$m1 = decbin($m1);
$e = str_pad(decbin(strlen($m1) - 1 + $b), $e, '0', STR_PAD_LEFT);
} else if($m1 == 1) {
$e = '0'.str_pad('', $e - 1, '1');
}
$num .= $m1;
$f *= 2;
for($i = 0; $i < $f; $i ++) {
$m2 *= 2;
if($m2 >= 1) {
$num .= '1';
$m2 -= 1;
} else {
$num .= '0';
}
}
if($m1 == 0) {
for($m1 = 0; $num[0] == '0'; $m1 --) {
$num = substr($num, 1);
}
$e = str_pad(decbin($m1 + $b), $e, '0', STR_PAD_LEFT);
}
$num = substr($num, 1, $f *= .5);
$num || ($num = str_pad('', $f, '0'));
return "$s$e$num";
} else {
new ERROR(ERROR::INVALID_DATA, $num);
}
} catch(Exception $e) {
echo $e;
}
}
//</editor-fold>
private function getPos() {
try {
if ($this->position < count($this))
return $this->position++;
else
new ERROR(ERROR::EOF);
} catch (Exception $e) {
echo $e;
}
return NULL;
}
private function tobin($num) {
$num = $num < 0 ? $num + 256:$num;
$num = decbin($num);
while(strlen($num) != 8) {
$num = '0'.$num;
}
return $num;
}
private function tohex($num) {
return (($num = ($num < 0) ? $num + 256:$num) < 16) ? '0'.dechex($num):dechex($num);
}
}
//* Tests
$a = new ByteArray();
$a->writeInt(12345);
$a->writeShort(11223);
$a->writeUnsignedInt(1125434357);
$a->position = 0;
echo "ReadInt: ";
echo $a->readInt()."\n";
echo "ReadShort: ";
echo $a->readShort()."\n";
echo "readUnsignedShort: ";
echo $a->readUnsignedInt()."\n";
$a->position = 0;
$a->writeDouble(1);
$a->writeDouble(0);
$a->writeDouble(1.00123);
$a->writeDouble(0.2156);
$a->writeDouble(100);
$a->writeDouble(1012.1234);
$a->writeFloat(2);
$a->writeFloat(1);
$a->writeFloat(0);
$a->writeFloat(0.00123);
$a->writeFloat(23.2156);
$a->writeFloat(150);
$a->writeFloat(132.1);
$a->position = 0;
echo "readDouble: ";
echo $a->readDouble()."\n";
echo "readDouble: ";
echo $a->readDouble()."\n";
echo "readDouble: ";
echo $a->readDouble()."\n";
echo "readDouble: ";
echo $a->readDouble()."\n";
echo "readDouble: ";
echo $a->readDouble()."\n";
echo "readDouble: ";
echo $a->readDouble()."\n";
echo "readFloat: ";
echo $a->readFloat()."\n";
echo "readFloat: ";
echo $a->readFloat()."\n";
echo "readFloat: ";
echo $a->readFloat()."\n";
echo "readFloat: ";
echo $a->readFloat()."\n";
echo "readFloat: ";
echo $a->readFloat()."\n";
echo "readFloat: ";
echo $a->readFloat()."\n";
//*/
?>
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