Viewing file:  BinaryStream.php (9.74 KB) -rwxr-xr-x
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<?php
/**
* @package php-font-lib
* @link https://github.com/PhenX/php-font-lib
* @author Fabien Ménager <fabien.menager@gmail.com>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
namespace FontLib;
/**
* Generic font file binary stream.
*
* @package php-font-lib
*/
class BinaryStream {
/**
* @var resource The file pointer
*/
protected $f;
const uint8 = 1;
const int8 = 2;
const uint16 = 3;
const int16 = 4;
const uint32 = 5;
const int32 = 6;
const shortFrac = 7;
const Fixed = 8;
const FWord = 9;
const uFWord = 10;
const F2Dot14 = 11;
const longDateTime = 12;
const char = 13;
const modeRead = "rb";
const modeWrite = "wb";
const modeReadWrite = "rb+";
static function backtrace() {
var_dump(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS));
}
/**
* Open a font file in read mode
*
* @param string $filename The file name of the font to open
*
* @return bool
*/
public function load($filename) {
return $this->open($filename, self::modeRead);
}
/**
* Open a font file in a chosen mode
*
* @param string $filename The file name of the font to open
* @param string $mode The opening mode
*
* @throws \Exception
* @return bool
*/
public function open($filename, $mode = self::modeRead) {
if (!in_array($mode, array(self::modeRead, self::modeWrite, self::modeReadWrite))) {
throw new \Exception("Unkown file open mode");
}
$this->f = fopen($filename, $mode);
return $this->f != false;
}
/**
* Close the internal file pointer
*/
public function close() {
return fclose($this->f) != false;
}
/**
* Change the internal file pointer
*
* @param resource $fp
*
* @throws \Exception
*/
public function setFile($fp) {
if (!is_resource($fp)) {
throw new \Exception('$fp is not a valid resource');
}
$this->f = $fp;
}
/**
* Create a temporary file in write mode
*
* @param bool $allow_memory Allow in-memory files
*
* @return resource the temporary file pointer resource
*/
public static function getTempFile($allow_memory = true) {
$f = null;
if ($allow_memory) {
$f = fopen("php://temp", "rb+");
}
else {
$f = fopen(tempnam(sys_get_temp_dir(), "fnt"), "rb+");
}
return $f;
}
/**
* Move the internal file pinter to $offset bytes
*
* @param int $offset
*
* @return bool True if the $offset position exists in the file
*/
public function seek($offset) {
return fseek($this->f, $offset, SEEK_SET) == 0;
}
/**
* Gives the current position in the file
*
* @return int The current position
*/
public function pos() {
return ftell($this->f);
}
public function skip($n) {
fseek($this->f, $n, SEEK_CUR);
}
public function read($n) {
if ($n < 1) {
return "";
}
return fread($this->f, $n);
}
public function write($data, $length = null) {
if ($data === null || $data === "" || $data === false) {
return 0;
}
return fwrite($this->f, $data, $length);
}
public function readUInt8() {
return ord($this->read(1));
}
public function readUInt8Many($count) {
return array_values(unpack("C*", $this->read($count)));
}
public function writeUInt8($data) {
return $this->write(chr($data), 1);
}
public function readInt8() {
$v = $this->readUInt8();
if ($v >= 0x80) {
$v -= 0x100;
}
return $v;
}
public function readInt8Many($count) {
return array_values(unpack("c*", $this->read($count)));
}
public function writeInt8($data) {
if ($data < 0) {
$data += 0x100;
}
return $this->writeUInt8($data);
}
public function readUInt16() {
$a = unpack("nn", $this->read(2));
return $a["n"];
}
public function readUInt16Many($count) {
return array_values(unpack("n*", $this->read($count * 2)));
}
public function readUFWord() {
return $this->readUInt16();
}
public function writeUInt16($data) {
return $this->write(pack("n", $data), 2);
}
public function writeUFWord($data) {
return $this->writeUInt16($data);
}
public function readInt16() {
$a = unpack("nn", $this->read(2));
$v = $a["n"];
if ($v >= 0x8000) {
$v -= 0x10000;
}
return $v;
}
public function readInt16Many($count) {
$vals = array_values(unpack("n*", $this->read($count * 2)));
foreach ($vals as &$v) {
if ($v >= 0x8000) {
$v -= 0x10000;
}
}
return $vals;
}
public function readFWord() {
return $this->readInt16();
}
public function writeInt16($data) {
if ($data < 0) {
$data += 0x10000;
}
return $this->writeUInt16($data);
}
public function writeFWord($data) {
return $this->writeInt16($data);
}
public function readUInt32() {
$a = unpack("NN", $this->read(4));
return $a["N"];
}
public function writeUInt32($data) {
return $this->write(pack("N", $data), 4);
}
public function readFixed() {
$d = $this->readInt16();
$d2 = $this->readUInt16();
return round($d + $d2 / 0x10000, 4);
}
public function writeFixed($data) {
$left = floor($data);
$right = ($data - $left) * 0x10000;
return $this->writeInt16($left) + $this->writeUInt16($right);
}
public function readLongDateTime() {
$this->readUInt32(); // ignored
$date = $this->readUInt32() - 2082844800;
# PHP_INT_MIN isn't defined in PHP < 7.0
$php_int_min = defined("PHP_INT_MIN") ? PHP_INT_MIN : ~PHP_INT_MAX;
if (is_string($date) || $date > PHP_INT_MAX || $date < $php_int_min) {
$date = 0;
}
return strftime("%Y-%m-%d %H:%M:%S", $date);
}
public function writeLongDateTime($data) {
$date = strtotime($data);
$date += 2082844800;
return $this->writeUInt32(0) + $this->writeUInt32($date);
}
public function unpack($def) {
$d = array();
foreach ($def as $name => $type) {
$d[$name] = $this->r($type);
}
return $d;
}
public function pack($def, $data) {
$bytes = 0;
foreach ($def as $name => $type) {
$bytes += $this->w($type, $data[$name]);
}
return $bytes;
}
/**
* Read a data of type $type in the file from the current position
*
* @param mixed $type The data type to read
*
* @return mixed The data that was read
*/
public function r($type) {
switch ($type) {
case self::uint8:
return $this->readUInt8();
case self::int8:
return $this->readInt8();
case self::uint16:
return $this->readUInt16();
case self::int16:
return $this->readInt16();
case self::uint32:
return $this->readUInt32();
case self::int32:
return $this->readUInt32();
case self::shortFrac:
return $this->readFixed();
case self::Fixed:
return $this->readFixed();
case self::FWord:
return $this->readInt16();
case self::uFWord:
return $this->readUInt16();
case self::F2Dot14:
return $this->readInt16();
case self::longDateTime:
return $this->readLongDateTime();
case self::char:
return $this->read(1);
default:
if (is_array($type)) {
if ($type[0] == self::char) {
return $this->read($type[1]);
}
if ($type[0] == self::uint16) {
return $this->readUInt16Many($type[1]);
}
if ($type[0] == self::int16) {
return $this->readInt16Many($type[1]);
}
if ($type[0] == self::uint8) {
return $this->readUInt8Many($type[1]);
}
if ($type[0] == self::int8) {
return $this->readInt8Many($type[1]);
}
$ret = array();
for ($i = 0; $i < $type[1]; $i++) {
$ret[] = $this->r($type[0]);
}
return $ret;
}
return null;
}
}
/**
* Write $data of type $type in the file from the current position
*
* @param mixed $type The data type to write
* @param mixed $data The data to write
*
* @return int The number of bytes read
*/
public function w($type, $data) {
switch ($type) {
case self::uint8:
return $this->writeUInt8($data);
case self::int8:
return $this->writeInt8($data);
case self::uint16:
return $this->writeUInt16($data);
case self::int16:
return $this->writeInt16($data);
case self::uint32:
return $this->writeUInt32($data);
case self::int32:
return $this->writeUInt32($data);
case self::shortFrac:
return $this->writeFixed($data);
case self::Fixed:
return $this->writeFixed($data);
case self::FWord:
return $this->writeInt16($data);
case self::uFWord:
return $this->writeUInt16($data);
case self::F2Dot14:
return $this->writeInt16($data);
case self::longDateTime:
return $this->writeLongDateTime($data);
case self::char:
return $this->write($data, 1);
default:
if (is_array($type)) {
if ($type[0] == self::char) {
return $this->write($data, $type[1]);
}
$ret = 0;
for ($i = 0; $i < $type[1]; $i++) {
if (isset($data[$i])) {
$ret += $this->w($type[0], $data[$i]);
}
}
return $ret;
}
return null;
}
}
/**
* Converts a Uint32 value to string
*
* @param int $uint32
*
* @return string The string
*/
public function convertUInt32ToStr($uint32) {
return chr(($uint32 >> 24) & 0xFF) . chr(($uint32 >> 16) & 0xFF) . chr(($uint32 >> 8) & 0xFF) . chr($uint32 & 0xFF);
}
}
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