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  1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (http://nette.org)
  5:  *
  6:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  7:  *
  8:  * For the full copyright and license information, please view
  9:  * the file license.txt that was distributed with this source code.
 10:  */
 11: 
 12: namespace Nette\Utils\PhpGenerator;
 13: 
 14: use Nette;
 15: 
 16: 
 17: /**
 18:  * PHP code generator utils.
 19:  *
 20:  * @author     David Grudl
 21:  */
 22: class Helpers
 23: {
 24:     const PHP_IDENT = '[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*';
 25: 
 26: 
 27:     /**
 28:      * Returns a PHP representation of a variable.
 29:      * @return string
 30:      */
 31:     public static function dump($var)
 32:     {
 33:         return self::_dump($var);
 34:     }
 35: 
 36: 
 37:     private static function _dump(& $var, $level = 0)
 38:     {
 39:         if ($var instanceof PhpLiteral) {
 40:             return $var->value;
 41: 
 42:         } elseif (is_float($var)) {
 43:             $var = var_export($var, TRUE);
 44:             return strpos($var, '.') === FALSE ? $var . '.0' : $var;
 45: 
 46:         } elseif (is_bool($var)) {
 47:             return $var ? 'TRUE' : 'FALSE';
 48: 
 49:         } elseif (is_string($var) && (preg_match('#[^\x09\x20-\x7E\xA0-\x{10FFFF}]#u', $var) || preg_last_error())) {
 50:             static $table;
 51:             if ($table === NULL) {
 52:                 foreach (range("\x00", "\xFF") as $ch) {
 53:                     $table[$ch] = ord($ch) < 32 || ord($ch) >= 127
 54:                         ? '\\x' . str_pad(dechex(ord($ch)), 2, '0', STR_PAD_LEFT)
 55:                         : $ch;
 56:                 }
 57:                 $table["\r"] = '\r';
 58:                 $table["\n"] = '\n';
 59:                 $table["\t"] = '\t';
 60:                 $table['$'] = '\\$';
 61:                 $table['\\'] = '\\\\';
 62:                 $table['"'] = '\\"';
 63:             }
 64:             return '"' . strtr($var, $table) . '"';
 65: 
 66:         } elseif (is_array($var)) {
 67:             $s = '';
 68:             $space = str_repeat("\t", $level);
 69: 
 70:             static $marker;
 71:             if ($marker === NULL) {
 72:                 $marker = uniqid("\x00", TRUE);
 73:             }
 74:             if (empty($var)) {
 75: 
 76:             } elseif ($level > 50 || isset($var[$marker])) {
 77:                 throw new Nette\InvalidArgumentException('Nesting level too deep or recursive dependency.');
 78: 
 79:             } else {
 80:                 $s .= "\n";
 81:                 $var[$marker] = TRUE;
 82:                 $counter = 0;
 83:                 foreach ($var as $k => & $v) {
 84:                     if ($k !== $marker) {
 85:                         $s .= "$space\t" . ($k === $counter ? '' : self::_dump($k) . " => ") . self::_dump($v, $level + 1) . ",\n";
 86:                         $counter = is_int($k) ? max($k + 1, $counter) : $counter;
 87:                     }
 88:                 }
 89:                 unset($var[$marker]);
 90:                 $s .= $space;
 91:             }
 92:             return "array($s)";
 93: 
 94:         } elseif (is_object($var)) {
 95:             $arr = (array) $var;
 96:             $s = '';
 97:             $space = str_repeat("\t", $level);
 98: 
 99:             static $list = array();
100:             if (empty($arr)) {
101: 
102:             } elseif ($level > 50 || in_array($var, $list, TRUE)) {
103:                 throw new Nette\InvalidArgumentException('Nesting level too deep or recursive dependency.');
104: 
105:             } else {
106:                 $s .= "\n";
107:                 $list[] = $var;
108:                 foreach ($arr as $k => & $v) {
109:                     if ($k[0] === "\x00") {
110:                         $k = substr($k, strrpos($k, "\x00") + 1);
111:                     }
112:                     $s .= "$space\t" . self::_dump($k) . " => " . self::_dump($v, $level + 1) . ",\n";
113:                 }
114:                 array_pop($list);
115:                 $s .= $space;
116:             }
117:             return get_class($var) === 'stdClass'
118:                 ? "(object) array($s)"
119:                 : __CLASS__ . "::createObject('" . get_class($var) . "', array($s))";
120: 
121:         } else {
122:             return var_export($var, TRUE);
123:         }
124:     }
125: 
126: 
127:     /**
128:      * Generates PHP statement.
129:      * @return string
130:      */
131:     public static function format($statement)
132:     {
133:         $args = func_get_args();
134:         return self::formatArgs(array_shift($args), $args);
135:     }
136: 
137: 
138:     /**
139:      * Generates PHP statement.
140:      * @return string
141:      */
142:     public static function formatArgs($statement, array $args)
143:     {
144:         $a = strpos($statement, '?');
145:         while ($a !== FALSE) {
146:             if (!$args) {
147:                 throw new Nette\InvalidArgumentException('Insufficient number of arguments.');
148:             }
149:             $arg = array_shift($args);
150:             if (substr($statement, $a + 1, 1) === '*') { // ?*
151:                 if (!is_array($arg)) {
152:                     throw new Nette\InvalidArgumentException('Argument must be an array.');
153:                 }
154:                 $arg = implode(', ', array_map(array(__CLASS__, 'dump'), $arg));
155:                 $statement = substr_replace($statement, $arg, $a, 2);
156: 
157:             } else {
158:                 $arg = substr($statement, $a - 1, 1) === '$' || in_array(substr($statement, $a - 2, 2), array('->', '::'))
159:                     ? self::formatMember($arg) : self::_dump($arg);
160:                 $statement = substr_replace($statement, $arg, $a, 1);
161:             }
162:             $a = strpos($statement, '?', $a + strlen($arg));
163:         }
164:         return $statement;
165:     }
166: 
167: 
168:     /**
169:      * Returns a PHP representation of a object member.
170:      * @return string
171:      */
172:     public static function formatMember($name)
173:     {
174:         return $name instanceof PhpLiteral || !self::isIdentifier($name)
175:             ? '{' . self::_dump($name) . '}'
176:             : $name ;
177:     }
178: 
179: 
180:     /**
181:      * @return bool
182:      */
183:     public static function isIdentifier($value)
184:     {
185:         return is_string($value) && preg_match('#^' . self::PHP_IDENT . '\z#', $value);
186:     }
187: 
188: 
189:     public static function createObject($class, array $props)
190:     {
191:         return unserialize('O' . substr(serialize((string) $class), 1, -1) . substr(serialize($props), 1));
192:     }
193: 
194: }
195: 
Nette Framework 2.0.12 API API documentation generated by ApiGen 2.8.0