Parser.php

gehe zur Dokumentation dieser Datei

<?php
class SimplePie_XML_Declaration_Parser
{
        var $version = '1.0';

        var $encoding = 'UTF-8';

        var $standalone = false;

        var $state = 'before_version_name';

        var $data = '';

        var $data_length = 0;

        var $position = 0;

        public function __construct($data)
        {
                $this->data = $data;
                $this->data_length = strlen($this->data);
        }

        public function parse()
        {
                while ($this->state && $this->state !== 'emit' && $this->has_data())
                {
                        $state = $this->state;
                        $this->$state();
                }
                $this->data = '';
                if ($this->state === 'emit')
                {
                        return true;
                }
                else
                {
                        $this->version = '';
                        $this->encoding = '';
                        $this->standalone = '';
                        return false;
                }
        }

        public function has_data()
        {
                return (bool) ($this->position < $this->data_length);
        }

        public function skip_whitespace()
        {
                $whitespace = strspn($this->data, "\x09\x0A\x0D\x20", $this->position);
                $this->position += $whitespace;
                return $whitespace;
        }

        public function get_value()
        {
                $quote = substr($this->data, $this->position, 1);
                if ($quote === '"' || $quote === "'")
                {
                        $this->position++;
                        $len = strcspn($this->data, $quote, $this->position);
                        if ($this->has_data())
                        {
                                $value = substr($this->data, $this->position, $len);
                                $this->position += $len + 1;
                                return $value;
                        }
                }
                return false;
        }

        public function before_version_name()
        {
                if ($this->skip_whitespace())
                {
                        $this->state = 'version_name';
                }
                else
                {
                        $this->state = false;
                }
        }

        public function version_name()
        {
                if (substr($this->data, $this->position, 7) === 'version')
                {
                        $this->position += 7;
                        $this->skip_whitespace();
                        $this->state = 'version_equals';
                }
                else
                {
                        $this->state = false;
                }
        }

        public function version_equals()
        {
                if (substr($this->data, $this->position, 1) === '=')
                {
                        $this->position++;
                        $this->skip_whitespace();
                        $this->state = 'version_value';
                }
                else
                {
                        $this->state = false;
                }
        }

        public function version_value()
        {
                if ($this->version = $this->get_value())
                {
                        $this->skip_whitespace();
                        if ($this->has_data())
                        {
                                $this->state = 'encoding_name';
                        }
                        else
                        {
                                $this->state = 'emit';
                        }
                }
                else
                {
                        $this->state = false;
                }
        }

        public function encoding_name()
        {
                if (substr($this->data, $this->position, 8) === 'encoding')
                {
                        $this->position += 8;
                        $this->skip_whitespace();
                        $this->state = 'encoding_equals';
                }
                else
                {
                        $this->state = 'standalone_name';
                }
        }

        public function encoding_equals()
        {
                if (substr($this->data, $this->position, 1) === '=')
                {
                        $this->position++;
                        $this->skip_whitespace();
                        $this->state = 'encoding_value';
                }
                else
                {
                        $this->state = false;
                }
        }

        public function encoding_value()
        {
                if ($this->encoding = $this->get_value())
                {
                        $this->skip_whitespace();
                        if ($this->has_data())
                        {
                                $this->state = 'standalone_name';
                        }
                        else
                        {
                                $this->state = 'emit';
                        }
                }
                else
                {
                        $this->state = false;
                }
        }

        public function standalone_name()
        {
                if (substr($this->data, $this->position, 10) === 'standalone')
                {
                        $this->position += 10;
                        $this->skip_whitespace();
                        $this->state = 'standalone_equals';
                }
                else
                {
                        $this->state = false;
                }
        }

        public function standalone_equals()
        {
                if (substr($this->data, $this->position, 1) === '=')
                {
                        $this->position++;
                        $this->skip_whitespace();
                        $this->state = 'standalone_value';
                }
                else
                {
                        $this->state = false;
                }
        }

        public function standalone_value()
        {
                if ($standalone = $this->get_value())
                {
                        switch ($standalone)
                        {
                                case 'yes':
                                        $this->standalone = true;
                                        break;

                                case 'no':
                                        $this->standalone = false;
                                        break;

                                default:
                                        $this->state = false;
                                        return;
                        }

                        $this->skip_whitespace();
                        if ($this->has_data())
                        {
                                $this->state = false;
                        }
                        else
                        {
                                $this->state = 'emit';
                        }
                }
                else
                {
                        $this->state = false;
                }
        }
}