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Differences Between: [Versions 310 and 311] [Versions 310 and 400] [Versions 310 and 401] [Versions 310 and 402] [Versions 310 and 403]

   1  <?php
   2  /**
   3   * SimplePie
   4   *
   5   * A PHP-Based RSS and Atom Feed Framework.
   6   * Takes the hard work out of managing a complete RSS/Atom solution.
   7   *
   8   * Copyright (c) 2004-2016, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
   9   * All rights reserved.
  10   *
  11   * Redistribution and use in source and binary forms, with or without modification, are
  12   * permitted provided that the following conditions are met:
  13   *
  14   * 	 * Redistributions of source code must retain the above copyright notice, this list of
  15   * 	   conditions and the following disclaimer.
  16   *
  17   * 	 * Redistributions in binary form must reproduce the above copyright notice, this list
  18   * 	   of conditions and the following disclaimer in the documentation and/or other materials
  19   * 	   provided with the distribution.
  20   *
  21   * 	 * Neither the name of the SimplePie Team nor the names of its contributors may be used
  22   * 	   to endorse or promote products derived from this software without specific prior
  23   * 	   written permission.
  24   *
  25   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
  26   * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  27   * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
  28   * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  30   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  31   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  32   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33   * POSSIBILITY OF SUCH DAMAGE.
  34   *
  35   * @package SimplePie
  36   * @copyright 2004-2016 Ryan Parman, Geoffrey Sneddon, Ryan McCue
  37   * @author Ryan Parman
  38   * @author Geoffrey Sneddon
  39   * @author Ryan McCue
  40   * @link http://simplepie.org/ SimplePie
  41   * @license http://www.opensource.org/licenses/bsd-license.php BSD License
  42   */
  43  
  44  
  45  /**
  46   * Parses the XML Declaration
  47   *
  48   * @package SimplePie
  49   * @subpackage Parsing
  50   */
  51  class SimplePie_XML_Declaration_Parser
  52  {
  53  	 /**
  54  	  * XML Version
  55  	  *
  56  	  * @access public
  57  	  * @var string
  58  	  */
  59  	 var $version = '1.0';
  60  
  61  	 /**
  62  	  * Encoding
  63  	  *
  64  	  * @access public
  65  	  * @var string
  66  	  */
  67  	 var $encoding = 'UTF-8';
  68  
  69  	 /**
  70  	  * Standalone
  71  	  *
  72  	  * @access public
  73  	  * @var bool
  74  	  */
  75  	 var $standalone = false;
  76  
  77  	 /**
  78  	  * Current state of the state machine
  79  	  *
  80  	  * @access private
  81  	  * @var string
  82  	  */
  83  	 var $state = 'before_version_name';
  84  
  85  	 /**
  86  	  * Input data
  87  	  *
  88  	  * @access private
  89  	  * @var string
  90  	  */
  91  	 var $data = '';
  92  
  93  	 /**
  94  	  * Input data length (to avoid calling strlen() everytime this is needed)
  95  	  *
  96  	  * @access private
  97  	  * @var int
  98  	  */
  99  	 var $data_length = 0;
 100  
 101  	 /**
 102  	  * Current position of the pointer
 103  	  *
 104  	  * @var int
 105  	  * @access private
 106  	  */
 107  	 var $position = 0;
 108  
 109  	 /**
 110  	  * Create an instance of the class with the input data
 111  	  *
 112  	  * @access public
 113  	  * @param string $data Input data
 114  	  */
 115  	public function __construct($data)
 116  	 {
 117  	 	 $this->data = $data;
 118  	 	 $this->data_length = strlen($this->data);
 119  	 }
 120  
 121  	 /**
 122  	  * Parse the input data
 123  	  *
 124  	  * @access public
 125  	  * @return bool true on success, false on failure
 126  	  */
 127  	public function parse()
 128  	 {
 129  	 	 while ($this->state && $this->state !== 'emit' && $this->has_data())
 130  	 	 {
 131  	 	 	 $state = $this->state;
 132  	 	 	 $this->$state();
 133  	 	 }
 134  	 	 $this->data = '';
 135  	 	 if ($this->state === 'emit')
 136  	 	 {
 137  	 	 	 return true;
 138  	 	 }
 139  
 140  	 	 $this->version = '';
 141  	 	 $this->encoding = '';
 142  	 	 $this->standalone = '';
 143  	 	 return false;
 144  	 }
 145  
 146  	 /**
 147  	  * Check whether there is data beyond the pointer
 148  	  *
 149  	  * @access private
 150  	  * @return bool true if there is further data, false if not
 151  	  */
 152  	public function has_data()
 153  	 {
 154  	 	 return (bool) ($this->position < $this->data_length);
 155  	 }
 156  
 157  	 /**
 158  	  * Advance past any whitespace
 159  	  *
 160  	  * @return int Number of whitespace characters passed
 161  	  */
 162  	public function skip_whitespace()
 163  	 {
 164  	 	 $whitespace = strspn($this->data, "\x09\x0A\x0D\x20", $this->position);
 165  	 	 $this->position += $whitespace;
 166  	 	 return $whitespace;
 167  	 }
 168  
 169  	 /**
 170  	  * Read value
 171  	  */
 172  	public function get_value()
 173  	 {
 174  	 	 $quote = substr($this->data, $this->position, 1);
 175  	 	 if ($quote === '"' || $quote === "'")
 176  	 	 {
 177  	 	 	 $this->position++;
 178  	 	 	 $len = strcspn($this->data, $quote, $this->position);
 179  	 	 	 if ($this->has_data())
 180  	 	 	 {
 181  	 	 	 	 $value = substr($this->data, $this->position, $len);
 182  	 	 	 	 $this->position += $len + 1;
 183  	 	 	 	 return $value;
 184  	 	 	 }
 185  	 	 }
 186  	 	 return false;
 187  	 }
 188  
 189  	public function before_version_name()
 190  	 {
 191  	 	 if ($this->skip_whitespace())
 192  	 	 {
 193  	 	 	 $this->state = 'version_name';
 194  	 	 }
 195  	 	 else
 196  	 	 {
 197  	 	 	 $this->state = false;
 198  	 	 }
 199  	 }
 200  
 201  	public function version_name()
 202  	 {
 203  	 	 if (substr($this->data, $this->position, 7) === 'version')
 204  	 	 {
 205  	 	 	 $this->position += 7;
 206  	 	 	 $this->skip_whitespace();
 207  	 	 	 $this->state = 'version_equals';
 208  	 	 }
 209  	 	 else
 210  	 	 {
 211  	 	 	 $this->state = false;
 212  	 	 }
 213  	 }
 214  
 215  	public function version_equals()
 216  	 {
 217  	 	 if (substr($this->data, $this->position, 1) === '=')
 218  	 	 {
 219  	 	 	 $this->position++;
 220  	 	 	 $this->skip_whitespace();
 221  	 	 	 $this->state = 'version_value';
 222  	 	 }
 223  	 	 else
 224  	 	 {
 225  	 	 	 $this->state = false;
 226  	 	 }
 227  	 }
 228  
 229  	public function version_value()
 230  	 {
 231  	 	 if ($this->version = $this->get_value())
 232  	 	 {
 233  	 	 	 $this->skip_whitespace();
 234  	 	 	 if ($this->has_data())
 235  	 	 	 {
 236  	 	 	 	 $this->state = 'encoding_name';
 237  	 	 	 }
 238  	 	 	 else
 239  	 	 	 {
 240  	 	 	 	 $this->state = 'emit';
 241  	 	 	 }
 242  	 	 }
 243  	 	 else
 244  	 	 {
 245  	 	 	 $this->state = false;
 246  	 	 }
 247  	 }
 248  
 249  	public function encoding_name()
 250  	 {
 251  	 	 if (substr($this->data, $this->position, 8) === 'encoding')
 252  	 	 {
 253  	 	 	 $this->position += 8;
 254  	 	 	 $this->skip_whitespace();
 255  	 	 	 $this->state = 'encoding_equals';
 256  	 	 }
 257  	 	 else
 258  	 	 {
 259  	 	 	 $this->state = 'standalone_name';
 260  	 	 }
 261  	 }
 262  
 263  	public function encoding_equals()
 264  	 {
 265  	 	 if (substr($this->data, $this->position, 1) === '=')
 266  	 	 {
 267  	 	 	 $this->position++;
 268  	 	 	 $this->skip_whitespace();
 269  	 	 	 $this->state = 'encoding_value';
 270  	 	 }
 271  	 	 else
 272  	 	 {
 273  	 	 	 $this->state = false;
 274  	 	 }
 275  	 }
 276  
 277  	public function encoding_value()
 278  	 {
 279  	 	 if ($this->encoding = $this->get_value())
 280  	 	 {
 281  	 	 	 $this->skip_whitespace();
 282  	 	 	 if ($this->has_data())
 283  	 	 	 {
 284  	 	 	 	 $this->state = 'standalone_name';
 285  	 	 	 }
 286  	 	 	 else
 287  	 	 	 {
 288  	 	 	 	 $this->state = 'emit';
 289  	 	 	 }
 290  	 	 }
 291  	 	 else
 292  	 	 {
 293  	 	 	 $this->state = false;
 294  	 	 }
 295  	 }
 296  
 297  	public function standalone_name()
 298  	 {
 299  	 	 if (substr($this->data, $this->position, 10) === 'standalone')
 300  	 	 {
 301  	 	 	 $this->position += 10;
 302  	 	 	 $this->skip_whitespace();
 303  	 	 	 $this->state = 'standalone_equals';
 304  	 	 }
 305  	 	 else
 306  	 	 {
 307  	 	 	 $this->state = false;
 308  	 	 }
 309  	 }
 310  
 311  	public function standalone_equals()
 312  	 {
 313  	 	 if (substr($this->data, $this->position, 1) === '=')
 314  	 	 {
 315  	 	 	 $this->position++;
 316  	 	 	 $this->skip_whitespace();
 317  	 	 	 $this->state = 'standalone_value';
 318  	 	 }
 319  	 	 else
 320  	 	 {
 321  	 	 	 $this->state = false;
 322  	 	 }
 323  	 }
 324  
 325  	public function standalone_value()
 326  	 {
 327  	 	 if ($standalone = $this->get_value())
 328  	 	 {
 329  	 	 	 switch ($standalone)
 330  	 	 	 {
 331  	 	 	 	 case 'yes':
 332  	 	 	 	 	 $this->standalone = true;
 333  	 	 	 	 	 break;
 334  
 335  	 	 	 	 case 'no':
 336  	 	 	 	 	 $this->standalone = false;
 337  	 	 	 	 	 break;
 338  
 339  	 	 	 	 default:
 340  	 	 	 	 	 $this->state = false;
 341  	 	 	 	 	 return;
 342  	 	 	 }
 343  
 344  	 	 	 $this->skip_whitespace();
 345  	 	 	 if ($this->has_data())
 346  	 	 	 {
 347  	 	 	 	 $this->state = false;
 348  	 	 	 }
 349  	 	 	 else
 350  	 	 	 {
 351  	 	 	 	 $this->state = 'emit';
 352  	 	 	 }
 353  	 	 }
 354  	 	 else
 355  	 	 {
 356  	 	 	 $this->state = false;
 357  	 	 }
 358  	 }
 359  }