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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <[email protected]>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Polyfill\Php72;
  13  
  14  /**
  15   * @author Nicolas Grekas <[email protected]>
  16   * @author Dariusz Rumiński <[email protected]>
  17   *
  18   * @internal
  19   */
  20  final class Php72
  21  {
  22      private static $hashMask;
  23  
  24      public static function utf8_encode($s)
  25      {
  26          $s .= $s;
  27          $len = \strlen($s);
  28  
  29          for ($i = $len >> 1, $j = 0; $i < $len; ++$i, ++$j) {
  30              switch (true) {
  31                  case $s[$i] < "\x80": $s[$j] = $s[$i]; break;
  32                  case $s[$i] < "\xC0": $s[$j] = "\xC2"; $s[++$j] = $s[$i]; break;
  33                  default: $s[$j] = "\xC3"; $s[++$j] = \chr(\ord($s[$i]) - 64); break;
  34              }
  35          }
  36  
  37          return substr($s, 0, $j);
  38      }
  39  
  40      public static function utf8_decode($s)
  41      {
  42          $s = (string) $s;
  43          $len = \strlen($s);
  44  
  45          for ($i = 0, $j = 0; $i < $len; ++$i, ++$j) {
  46              switch ($s[$i] & "\xF0") {
  47                  case "\xC0":
  48                  case "\xD0":
  49                      $c = (\ord($s[$i] & "\x1F") << 6) | \ord($s[++$i] & "\x3F");
  50                      $s[$j] = $c < 256 ? \chr($c) : '?';
  51                      break;
  52  
  53                  case "\xF0":
  54                      ++$i;
  55                      // no break
  56  
  57                  case "\xE0":
  58                      $s[$j] = '?';
  59                      $i += 2;
  60                      break;
  61  
  62                  default:
  63                      $s[$j] = $s[$i];
  64              }
  65          }
  66  
  67          return substr($s, 0, $j);
  68      }
  69  
  70      public static function php_os_family()
  71      {
  72          if ('\\' === \DIRECTORY_SEPARATOR) {
  73              return 'Windows';
  74          }
  75  
  76          $map = [
  77              'Darwin' => 'Darwin',
  78              'DragonFly' => 'BSD',
  79              'FreeBSD' => 'BSD',
  80              'NetBSD' => 'BSD',
  81              'OpenBSD' => 'BSD',
  82              'Linux' => 'Linux',
  83              'SunOS' => 'Solaris',
  84          ];
  85  
  86          return isset($map[\PHP_OS]) ? $map[\PHP_OS] : 'Unknown';
  87      }
  88  
  89      public static function spl_object_id($object)
  90      {
  91          if (null === self::$hashMask) {
  92              self::initHashMask();
  93          }
  94          if (null === $hash = spl_object_hash($object)) {
  95              return;
  96          }
  97  
  98          // On 32-bit systems, PHP_INT_SIZE is 4,
  99          return self::$hashMask ^ hexdec(substr($hash, 16 - (\PHP_INT_SIZE * 2 - 1), (\PHP_INT_SIZE * 2 - 1)));
 100      }
 101  
 102      public static function sapi_windows_vt100_support($stream, $enable = null)
 103      {
 104          if (!\is_resource($stream)) {
 105              trigger_error('sapi_windows_vt100_support() expects parameter 1 to be resource, '.\gettype($stream).' given', \E_USER_WARNING);
 106  
 107              return false;
 108          }
 109  
 110          $meta = stream_get_meta_data($stream);
 111  
 112          if ('STDIO' !== $meta['stream_type']) {
 113              trigger_error('sapi_windows_vt100_support() was not able to analyze the specified stream', \E_USER_WARNING);
 114  
 115              return false;
 116          }
 117  
 118          // We cannot actually disable vt100 support if it is set
 119          if (false === $enable || !self::stream_isatty($stream)) {
 120              return false;
 121          }
 122  
 123          // The native function does not apply to stdin
 124          $meta = array_map('strtolower', $meta);
 125          $stdin = 'php://stdin' === $meta['uri'] || 'php://fd/0' === $meta['uri'];
 126  
 127          return !$stdin
 128              && (false !== getenv('ANSICON')
 129              || 'ON' === getenv('ConEmuANSI')
 130              || 'xterm' === getenv('TERM')
 131              || 'Hyper' === getenv('TERM_PROGRAM'));
 132      }
 133  
 134      public static function stream_isatty($stream)
 135      {
 136          if (!\is_resource($stream)) {
 137              trigger_error('stream_isatty() expects parameter 1 to be resource, '.\gettype($stream).' given', \E_USER_WARNING);
 138  
 139              return false;
 140          }
 141  
 142          if ('\\' === \DIRECTORY_SEPARATOR) {
 143              $stat = @fstat($stream);
 144              // Check if formatted mode is S_IFCHR
 145              return $stat ? 0020000 === ($stat['mode'] & 0170000) : false;
 146          }
 147  
 148          return \function_exists('posix_isatty') && @posix_isatty($stream);
 149      }
 150  
 151      private static function initHashMask()
 152      {
 153          $obj = (object) [];
 154          self::$hashMask = -1;
 155  
 156          // check if we are nested in an output buffering handler to prevent a fatal error with ob_start() below
 157          $obFuncs = ['ob_clean', 'ob_end_clean', 'ob_flush', 'ob_end_flush', 'ob_get_contents', 'ob_get_flush'];
 158          foreach (debug_backtrace(\PHP_VERSION_ID >= 50400 ? \DEBUG_BACKTRACE_IGNORE_ARGS : false) as $frame) {
 159              if (isset($frame['function'][0]) && !isset($frame['class']) && 'o' === $frame['function'][0] && \in_array($frame['function'], $obFuncs)) {
 160                  $frame['line'] = 0;
 161                  break;
 162              }
 163          }
 164          if (!empty($frame['line'])) {
 165              ob_start();
 166              debug_zval_dump($obj);
 167              self::$hashMask = (int) substr(ob_get_clean(), 17);
 168          }
 169  
 170          self::$hashMask ^= hexdec(substr(spl_object_hash($obj), 16 - (\PHP_INT_SIZE * 2 - 1), (\PHP_INT_SIZE * 2 - 1)));
 171      }
 172  
 173      public static function mb_chr($code, $encoding = null)
 174      {
 175          if (0x80 > $code %= 0x200000) {
 176              $s = \chr($code);
 177          } elseif (0x800 > $code) {
 178              $s = \chr(0xC0 | $code >> 6).\chr(0x80 | $code & 0x3F);
 179          } elseif (0x10000 > $code) {
 180              $s = \chr(0xE0 | $code >> 12).\chr(0x80 | $code >> 6 & 0x3F).\chr(0x80 | $code & 0x3F);
 181          } else {
 182              $s = \chr(0xF0 | $code >> 18).\chr(0x80 | $code >> 12 & 0x3F).\chr(0x80 | $code >> 6 & 0x3F).\chr(0x80 | $code & 0x3F);
 183          }
 184  
 185          if ('UTF-8' !== $encoding = $encoding ?? mb_internal_encoding()) {
 186              $s = mb_convert_encoding($s, $encoding, 'UTF-8');
 187          }
 188  
 189          return $s;
 190      }
 191  
 192      public static function mb_ord($s, $encoding = null)
 193      {
 194          if (null === $encoding) {
 195              $s = mb_convert_encoding($s, 'UTF-8');
 196          } elseif ('UTF-8' !== $encoding) {
 197              $s = mb_convert_encoding($s, 'UTF-8', $encoding);
 198          }
 199  
 200          if (1 === \strlen($s)) {
 201              return \ord($s);
 202          }
 203  
 204          $code = ($s = unpack('C*', substr($s, 0, 4))) ? $s[1] : 0;
 205          if (0xF0 <= $code) {
 206              return (($code - 0xF0) << 18) + (($s[2] - 0x80) << 12) + (($s[3] - 0x80) << 6) + $s[4] - 0x80;
 207          }
 208          if (0xE0 <= $code) {
 209              return (($code - 0xE0) << 12) + (($s[2] - 0x80) << 6) + $s[3] - 0x80;
 210          }
 211          if (0xC0 <= $code) {
 212              return (($code - 0xC0) << 6) + $s[2] - 0x80;
 213          }
 214  
 215          return $code;
 216      }
 217  }