krz/vox-populi

  1<?php
  2
  3/*
  4 * This file is part of the Symfony package.
  5 *
  6 * (c) Fabien Potencier <fabien@symfony.com>
  7 *
  8 * For the full copyright and license information, please view the LICENSE
  9 * file that was distributed with this source code.
 10 */
 11
 12namespace Symfony\Polyfill\Php72;
 13
 14/**
 15 * @author Nicolas Grekas <p@tchwork.com>
 16 * @author Dariusz Rumiński <dariusz.ruminski@gmail.com>
 17 *
 18 * @internal
 19 */
 20final 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        $map = array(
 77            'Darwin' => 'Darwin',
 78            'DragonFly' => 'BSD',
 79            'FreeBSD' => 'BSD',
 80            'NetBSD' => 'BSD',
 81            'OpenBSD' => 'BSD',
 82            'Linux' => 'Linux',
 83            'SunOS' => 'Solaris',
 84        );
 85
 86        return isset($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        $obj = (object) array();
154        self::$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 = array('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) {
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}