Merge pull request #363 from inthepoche/dev1.3.0

poche 1.3.0

1 files changed, 1238 insertions, 0 deletions

diff --git a/inc/3rdparty/libraries/simplepie/library/SimplePie/IRI.php b/inc/3rdparty/libraries/simplepie/library/SimplePie/IRI.php
new file mode 100644
index 00000000..d3198c04
--- /dev/null
+++ b/inc/3rdparty/libraries/simplepie/library/SimplePie/IRI.php
@@ -0,0 +1,1238 @@
+<?php
+/**
+ * SimplePie
+ *
+ * A PHP-Based RSS and Atom Feed Framework.
+ * Takes the hard work out of managing a complete RSS/Atom solution.
+ *
+ * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *      * Redistributions of source code must retain the above copyright notice, this list of
+ *        conditions and the following disclaimer.
+ *
+ *      * Redistributions in binary form must reproduce the above copyright notice, this list
+ *        of conditions and the following disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ *      * Neither the name of the SimplePie Team nor the names of its contributors may be used
+ *        to endorse or promote products derived from this software without specific prior
+ *        written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
+ * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @package SimplePie
+ * @version 1.3.1
+ * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
+ * @author Ryan Parman
+ * @author Geoffrey Sneddon
+ * @author Ryan McCue
+ * @link http://simplepie.org/ SimplePie
+ * @license http://www.opensource.org/licenses/bsd-license.php BSD License
+ */
+
+/**
+ * IRI parser/serialiser/normaliser
+ *
+ * @package SimplePie
+ * @subpackage HTTP
+ * @author Geoffrey Sneddon
+ * @author Steve Minutillo
+ * @author Ryan McCue
+ * @copyright 2007-2012 Geoffrey Sneddon, Steve Minutillo, Ryan McCue
+ * @license http://www.opensource.org/licenses/bsd-license.php
+ */
+class SimplePie_IRI
+{
+        /**
+         * Scheme
+         *
+         * @var string
+         */
+        protected $scheme = null;
+
+        /**
+         * User Information
+         *
+         * @var string
+         */
+        protected $iuserinfo = null;
+
+        /**
+         * ihost
+         *
+         * @var string
+         */
+        protected $ihost = null;
+
+        /**
+         * Port
+         *
+         * @var string
+         */
+        protected $port = null;
+
+        /**
+         * ipath
+         *
+         * @var string
+         */
+        protected $ipath = '';
+
+        /**
+         * iquery
+         *
+         * @var string
+         */
+        protected $iquery = null;
+
+        /**
+         * ifragment
+         *
+         * @var string
+         */
+        protected $ifragment = null;
+
+        /**
+         * Normalization database
+         *
+         * Each key is the scheme, each value is an array with each key as the IRI
+         * part and value as the default value for that part.
+         */
+        protected $normalization = array(
+                'acap' => array(
+                        'port' => 674
+                ),
+                'dict' => array(
+                        'port' => 2628
+                ),
+                'file' => array(
+                        'ihost' => 'localhost'
+                ),
+                'http' => array(
+                        'port' => 80,
+                        'ipath' => '/'
+                ),
+                'https' => array(
+                        'port' => 443,
+                        'ipath' => '/'
+                ),
+        );
+
+        /**
+         * Return the entire IRI when you try and read the object as a string
+         *
+         * @return string
+         */
+        public function __toString()
+        {
+                return $this->get_iri();
+        }
+
+        /**
+         * Overload __set() to provide access via properties
+         *
+         * @param string $name Property name
+         * @param mixed $value Property value
+         */
+        public function __set($name, $value)
+        {
+                if (method_exists($this, 'set_' . $name))
+                {
+                        call_user_func(array($this, 'set_' . $name), $value);
+                }
+                elseif (
+                           $name === 'iauthority'
+                        || $name === 'iuserinfo'
+                        || $name === 'ihost'
+                        || $name === 'ipath'
+                        || $name === 'iquery'
+                        || $name === 'ifragment'
+                )
+                {
+                        call_user_func(array($this, 'set_' . substr($name, 1)), $value);
+                }
+        }
+
+        /**
+         * Overload __get() to provide access via properties
+         *
+         * @param string $name Property name
+         * @return mixed
+         */
+        public function __get($name)
+        {
+                // isset() returns false for null, we don't want to do that
+                // Also why we use array_key_exists below instead of isset()
+                $props = get_object_vars($this);
+
+                if (
+                        $name === 'iri' ||
+                        $name === 'uri' ||
+                        $name === 'iauthority' ||
+                        $name === 'authority'
+                )
+                {
+                        $return = $this->{"get_$name"}();
+                }
+                elseif (array_key_exists($name, $props))
+                {
+                        $return = $this->$name;
+                }
+                // host -> ihost
+                elseif (($prop = 'i' . $name) && array_key_exists($prop, $props))
+                {
+                        $name = $prop;
+                        $return = $this->$prop;
+                }
+                // ischeme -> scheme
+                elseif (($prop = substr($name, 1)) && array_key_exists($prop, $props))
+                {
+                        $name = $prop;
+                        $return = $this->$prop;
+                }
+                else
+                {
+                        trigger_error('Undefined property: ' . get_class($this) . '::' . $name, E_USER_NOTICE);
+                        $return = null;
+                }
+
+                if ($return === null && isset($this->normalization[$this->scheme][$name]))
+                {
+                        return $this->normalization[$this->scheme][$name];
+                }
+                else
+                {
+                        return $return;
+                }
+        }
+
+        /**
+         * Overload __isset() to provide access via properties
+         *
+         * @param string $name Property name
+         * @return bool
+         */
+        public function __isset($name)
+        {
+                if (method_exists($this, 'get_' . $name) || isset($this->$name))
+                {
+                        return true;
+                }
+                else
+                {
+                        return false;
+                }
+        }
+
+        /**
+         * Overload __unset() to provide access via properties
+         *
+         * @param string $name Property name
+         */
+        public function __unset($name)
+        {
+                if (method_exists($this, 'set_' . $name))
+                {
+                        call_user_func(array($this, 'set_' . $name), '');
+                }
+        }
+
+        /**
+         * Create a new IRI object, from a specified string
+         *
+         * @param string $iri
+         */
+        public function __construct($iri = null)
+        {
+                $this->set_iri($iri);
+        }
+
+        /**
+         * Create a new IRI object by resolving a relative IRI
+         *
+         * Returns false if $base is not absolute, otherwise an IRI.
+         *
+         * @param IRI|string $base (Absolute) Base IRI
+         * @param IRI|string $relative Relative IRI
+         * @return IRI|false
+         */
+        public static function absolutize($base, $relative)
+        {
+                if (!($relative instanceof SimplePie_IRI))
+                {
+                        $relative = new SimplePie_IRI($relative);
+                }
+                if (!$relative->is_valid())
+                {
+                        return false;
+                }
+                elseif ($relative->scheme !== null)
+                {
+                        return clone $relative;
+                }
+                else
+                {
+                        if (!($base instanceof SimplePie_IRI))
+                        {
+                                $base = new SimplePie_IRI($base);
+                        }
+                        if ($base->scheme !== null && $base->is_valid())
+                        {
+                                if ($relative->get_iri() !== '')
+                                {
+                                        if ($relative->iuserinfo !== null || $relative->ihost !== null || $relative->port !== null)
+                                        {
+                                                $target = clone $relative;
+                                                $target->scheme = $base->scheme;
+                                        }
+                                        else
+                                        {
+                                                $target = new SimplePie_IRI;
+                                                $target->scheme = $base->scheme;
+                                                $target->iuserinfo = $base->iuserinfo;
+                                                $target->ihost = $base->ihost;
+                                                $target->port = $base->port;
+                                                if ($relative->ipath !== '')
+                                                {
+                                                        if ($relative->ipath[0] === '/')
+                                                        {
+                                                                $target->ipath = $relative->ipath;
+                                                        }
+                                                        elseif (($base->iuserinfo !== null || $base->ihost !== null || $base->port !== null) && $base->ipath === '')
+                                                        {
+                                                                $target->ipath = '/' . $relative->ipath;
+                                                        }
+                                                        elseif (($last_segment = strrpos($base->ipath, '/')) !== false)
+                                                        {
+                                                                $target->ipath = substr($base->ipath, 0, $last_segment + 1) . $relative->ipath;
+                                                        }
+                                                        else
+                                                        {
+                                                                $target->ipath = $relative->ipath;
+                                                        }
+                                                        $target->ipath = $target->remove_dot_segments($target->ipath);
+                                                        $target->iquery = $relative->iquery;
+                                                }
+                                                else
+                                                {
+                                                        $target->ipath = $base->ipath;
+                                                        if ($relative->iquery !== null)
+                                                        {
+                                                                $target->iquery = $relative->iquery;
+                                                        }
+                                                        elseif ($base->iquery !== null)
+                                                        {
+                                                                $target->iquery = $base->iquery;
+                                                        }
+                                                }
+                                                $target->ifragment = $relative->ifragment;
+                                        }
+                                }
+                                else
+                                {
+                                        $target = clone $base;
+                                        $target->ifragment = null;
+                                }
+                                $target->scheme_normalization();
+                                return $target;
+                        }
+                        else
+                        {
+                                return false;
+                        }
+                }
+        }
+
+        /**
+         * Parse an IRI into scheme/authority/path/query/fragment segments
+         *
+         * @param string $iri
+         * @return array
+         */
+        protected function parse_iri($iri)
+        {
+                $iri = trim($iri, "\x20\x09\x0A\x0C\x0D");
+                if (preg_match('/^((?P<scheme>[^:\/?#]+):)?(\/\/(?P<authority>[^\/?#]*))?(?P<path>[^?#]*)(\?(?P<query>[^#]*))?(#(?P<fragment>.*))?$/', $iri, $match))
+                {
+                        if ($match[1] === '')
+                        {
+                                $match['scheme'] = null;
+                        }
+                        if (!isset($match[3]) || $match[3] === '')
+                        {
+                                $match['authority'] = null;
+                        }
+                        if (!isset($match[5]))
+                        {
+                                $match['path'] = '';
+                        }
+                        if (!isset($match[6]) || $match[6] === '')
+                        {
+                                $match['query'] = null;
+                        }
+                        if (!isset($match[8]) || $match[8] === '')
+                        {
+                                $match['fragment'] = null;
+                        }
+                        return $match;
+                }
+                else
+                {
+                        // This can occur when a paragraph is accidentally parsed as a URI
+                        return false;
+                }
+        }
+
+        /**
+         * Remove dot segments from a path
+         *
+         * @param string $input
+         * @return string
+         */
+        protected function remove_dot_segments($input)
+        {
+                $output = '';
+                while (strpos($input, './') !== false || strpos($input, '/.') !== false || $input === '.' || $input === '..')
+                {
+                        // A: If the input buffer begins with a prefix of "../" or "./", then remove that prefix from the input buffer; otherwise,
+                        if (strpos($input, '../') === 0)
+                        {
+                                $input = substr($input, 3);
+                        }
+                        elseif (strpos($input, './') === 0)
+                        {
+                                $input = substr($input, 2);
+                        }
+                        // B: if the input buffer begins with a prefix of "/./" or "/.", where "." is a complete path segment, then replace that prefix with "/" in the input buffer; otherwise,
+                        elseif (strpos($input, '/./') === 0)
+                        {
+                                $input = substr($input, 2);
+                        }
+                        elseif ($input === '/.')
+                        {
+                                $input = '/';
+                        }
+                        // C: if the input buffer begins with a prefix of "/../" or "/..", where ".." is a complete path segment, then replace that prefix with "/" in the input buffer and remove the last segment and its preceding "/" (if any) from the output buffer; otherwise,
+                        elseif (strpos($input, '/../') === 0)
+                        {
+                                $input = substr($input, 3);
+                                $output = substr_replace($output, '', strrpos($output, '/'));
+                        }
+                        elseif ($input === '/..')
+                        {
+                                $input = '/';
+                                $output = substr_replace($output, '', strrpos($output, '/'));
+                        }
+                        // D: if the input buffer consists only of "." or "..", then remove that from the input buffer; otherwise,
+                        elseif ($input === '.' || $input === '..')
+                        {
+                                $input = '';
+                        }
+                        // E: move the first path segment in the input buffer to the end of the output buffer, including the initial "/" character (if any) and any subsequent characters up to, but not including, the next "/" character or the end of the input buffer
+                        elseif (($pos = strpos($input, '/', 1)) !== false)
+                        {
+                                $output .= substr($input, 0, $pos);
+                                $input = substr_replace($input, '', 0, $pos);
+                        }
+                        else
+                        {
+                                $output .= $input;
+                                $input = '';
+                        }
+                }
+                return $output . $input;
+        }
+
+        /**
+         * Replace invalid character with percent encoding
+         *
+         * @param string $string Input string
+         * @param string $extra_chars Valid characters not in iunreserved or
+         *                            iprivate (this is ASCII-only)
+         * @param bool $iprivate Allow iprivate
+         * @return string
+         */
+        protected function replace_invalid_with_pct_encoding($string, $extra_chars, $iprivate = false)
+        {
+                // Normalize as many pct-encoded sections as possible
+                $string = preg_replace_callback('/(?:%[A-Fa-f0-9]{2})+/', array($this, 'remove_iunreserved_percent_encoded'), $string);
+
+                // Replace invalid percent characters
+                $string = preg_replace('/%(?![A-Fa-f0-9]{2})/', '%25', $string);
+
+                // Add unreserved and % to $extra_chars (the latter is safe because all
+                // pct-encoded sections are now valid).
+                $extra_chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~%';
+
+                // Now replace any bytes that aren't allowed with their pct-encoded versions
+                $position = 0;
+                $strlen = strlen($string);
+                while (($position += strspn($string, $extra_chars, $position)) < $strlen)
+                {
+                        $value = ord($string[$position]);
+
+                        // Start position
+                        $start = $position;
+
+                        // By default we are valid
+                        $valid = true;
+
+                        // No one byte sequences are valid due to the while.
+                        // Two byte sequence:
+                        if (($value & 0xE0) === 0xC0)
+                        {
+                                $character = ($value & 0x1F) << 6;
+                                $length = 2;
+                                $remaining = 1;
+                        }
+                        // Three byte sequence:
+                        elseif (($value & 0xF0) === 0xE0)
+                        {
+                                $character = ($value & 0x0F) << 12;
+                                $length = 3;
+                                $remaining = 2;
+                        }
+                        // Four byte sequence:
+                        elseif (($value & 0xF8) === 0xF0)
+                        {
+                                $character = ($value & 0x07) << 18;
+                                $length = 4;
+                                $remaining = 3;
+                        }
+                        // Invalid byte:
+                        else
+                        {
+                                $valid = false;
+                                $length = 1;
+                                $remaining = 0;
+                        }
+
+                        if ($remaining)
+                        {
+                                if ($position + $length <= $strlen)
+                                {
+                                        for ($position++; $remaining; $position++)
+                                        {
+                                                $value = ord($string[$position]);
+
+                                                // Check that the byte is valid, then add it to the character:
+                                                if (($value & 0xC0) === 0x80)
+                                                {
+                                                        $character |= ($value & 0x3F) << (--$remaining * 6);
+                                                }
+                                                // If it is invalid, count the sequence as invalid and reprocess the current byte:
+                                                else
+                                                {
+                                                        $valid = false;
+                                                        $position--;
+                                                        break;
+                                                }
+                                        }
+                                }
+                                else
+                                {
+                                        $position = $strlen - 1;
+                                        $valid = false;
+                                }
+                        }
+
+                        // Percent encode anything invalid or not in ucschar
+                        if (
+                                // Invalid sequences
+                                !$valid
+                                // Non-shortest form sequences are invalid
+                                || $length > 1 && $character <= 0x7F
+                                || $length > 2 && $character <= 0x7FF
+                                || $length > 3 && $character <= 0xFFFF
+                                // Outside of range of ucschar codepoints
+                                // Noncharacters
+                                || ($character & 0xFFFE) === 0xFFFE
+                                || $character >= 0xFDD0 && $character <= 0xFDEF
+                                || (
+                                        // Everything else not in ucschar
+                                           $character > 0xD7FF && $character < 0xF900
+                                        || $character < 0xA0
+                                        || $character > 0xEFFFD
+                                )
+                                && (
+                                        // Everything not in iprivate, if it applies
+                                           !$iprivate
+                                        || $character < 0xE000
+                                        || $character > 0x10FFFD
+                                )
+                        )
+                        {
+                                // If we were a character, pretend we weren't, but rather an error.
+                                if ($valid)
+                                        $position--;
+
+                                for ($j = $start; $j <= $position; $j++)
+                                {
+                                        $string = substr_replace($string, sprintf('%%%02X', ord($string[$j])), $j, 1);
+                                        $j += 2;
+                                        $position += 2;
+                                        $strlen += 2;
+                                }
+                        }
+                }
+
+                return $string;
+        }
+
+        /**
+         * Callback function for preg_replace_callback.
+         *
+         * Removes sequences of percent encoded bytes that represent UTF-8
+         * encoded characters in iunreserved
+         *
+         * @param array $match PCRE match
+         * @return string Replacement
+         */
+        protected function remove_iunreserved_percent_encoded($match)
+        {
+                // As we just have valid percent encoded sequences we can just explode
+                // and ignore the first member of the returned array (an empty string).
+                $bytes = explode('%', $match[0]);
+
+                // Initialize the new string (this is what will be returned) and that
+                // there are no bytes remaining in the current sequence (unsurprising
+                // at the first byte!).
+                $string = '';
+                $remaining = 0;
+
+                // Loop over each and every byte, and set $value to its value
+                for ($i = 1, $len = count($bytes); $i < $len; $i++)
+                {
+                        $value = hexdec($bytes[$i]);
+
+                        // If we're the first byte of sequence:
+                        if (!$remaining)
+                        {
+                                // Start position
+                                $start = $i;
+
+                                // By default we are valid
+                                $valid = true;
+
+                                // One byte sequence:
+                                if ($value <= 0x7F)
+                                {
+                                        $character = $value;
+                                        $length = 1;
+                                }
+                                // Two byte sequence:
+                                elseif (($value & 0xE0) === 0xC0)
+                                {
+                                        $character = ($value & 0x1F) << 6;
+                                        $length = 2;
+                                        $remaining = 1;
+                                }
+                                // Three byte sequence:
+                                elseif (($value & 0xF0) === 0xE0)
+                                {
+                                        $character = ($value & 0x0F) << 12;
+                                        $length = 3;
+                                        $remaining = 2;
+                                }
+                                // Four byte sequence:
+                                elseif (($value & 0xF8) === 0xF0)
+                                {
+                                        $character = ($value & 0x07) << 18;
+                                        $length = 4;
+                                        $remaining = 3;
+                                }
+                                // Invalid byte:
+                                else
+                                {
+                                        $valid = false;
+                                        $remaining = 0;
+                                }
+                        }
+                        // Continuation byte:
+                        else
+                        {
+                                // Check that the byte is valid, then add it to the character:
+                                if (($value & 0xC0) === 0x80)
+                                {
+                                        $remaining--;
+                                        $character |= ($value & 0x3F) << ($remaining * 6);
+                                }
+                                // If it is invalid, count the sequence as invalid and reprocess the current byte as the start of a sequence:
+                                else
+                                {
+                                        $valid = false;
+                                        $remaining = 0;
+                                        $i--;
+                                }
+                        }
+
+                        // If we've reached the end of the current byte sequence, append it to Unicode::$data
+                        if (!$remaining)
+                        {
+                                // Percent encode anything invalid or not in iunreserved
+                                if (
+                                        // Invalid sequences
+                                        !$valid
+                                        // Non-shortest form sequences are invalid
+                                        || $length > 1 && $character <= 0x7F
+                                        || $length > 2 && $character <= 0x7FF
+                                        || $length > 3 && $character <= 0xFFFF
+                                        // Outside of range of iunreserved codepoints
+                                        || $character < 0x2D
+                                        || $character > 0xEFFFD
+                                        // Noncharacters
+                                        || ($character & 0xFFFE) === 0xFFFE
+                                        || $character >= 0xFDD0 && $character <= 0xFDEF
+                                        // Everything else not in iunreserved (this is all BMP)
+                                        || $character === 0x2F
+                                        || $character > 0x39 && $character < 0x41
+                                        || $character > 0x5A && $character < 0x61
+                                        || $character > 0x7A && $character < 0x7E
+                                        || $character > 0x7E && $character < 0xA0
+                                        || $character > 0xD7FF && $character < 0xF900
+                                )
+                                {
+                                        for ($j = $start; $j <= $i; $j++)
+                                        {
+                                                $string .= '%' . strtoupper($bytes[$j]);
+                                        }
+                                }
+                                else
+                                {
+                                        for ($j = $start; $j <= $i; $j++)
+                                        {
+                                                $string .= chr(hexdec($bytes[$j]));
+                                        }
+                                }
+                        }
+                }
+
+                // If we have any bytes left over they are invalid (i.e., we are
+                // mid-way through a multi-byte sequence)
+                if ($remaining)
+                {
+                        for ($j = $start; $j < $len; $j++)
+                        {
+                                $string .= '%' . strtoupper($bytes[$j]);
+                        }
+                }
+
+                return $string;
+        }
+
+        protected function scheme_normalization()
+        {
+                if (isset($this->normalization[$this->scheme]['iuserinfo']) && $this->iuserinfo === $this->normalization[$this->scheme]['iuserinfo'])
+                {
+                        $this->iuserinfo = null;
+                }
+                if (isset($this->normalization[$this->scheme]['ihost']) && $this->ihost === $this->normalization[$this->scheme]['ihost'])
+                {
+                        $this->ihost = null;
+                }
+                if (isset($this->normalization[$this->scheme]['port']) && $this->port === $this->normalization[$this->scheme]['port'])
+                {
+                        $this->port = null;
+                }
+                if (isset($this->normalization[$this->scheme]['ipath']) && $this->ipath === $this->normalization[$this->scheme]['ipath'])
+                {
+                        $this->ipath = '';
+                }
+                if (isset($this->normalization[$this->scheme]['iquery']) && $this->iquery === $this->normalization[$this->scheme]['iquery'])
+                {
+                        $this->iquery = null;
+                }
+                if (isset($this->normalization[$this->scheme]['ifragment']) && $this->ifragment === $this->normalization[$this->scheme]['ifragment'])
+                {
+                        $this->ifragment = null;
+                }
+        }
+
+        /**
+         * Check if the object represents a valid IRI. This needs to be done on each
+         * call as some things change depending on another part of the IRI.
+         *
+         * @return bool
+         */
+        public function is_valid()
+        {
+                $isauthority = $this->iuserinfo !== null || $this->ihost !== null || $this->port !== null;
+                if ($this->ipath !== '' &&
+                        (
+                                $isauthority && (
+                                        $this->ipath[0] !== '/' ||
+                                        substr($this->ipath, 0, 2) === '//'
+                                ) ||
+                                (
+                                        $this->scheme === null &&
+                                        !$isauthority &&
+                                        strpos($this->ipath, ':') !== false &&
+                                        (strpos($this->ipath, '/') === false ? true : strpos($this->ipath, ':') < strpos($this->ipath, '/'))
+                                )
+                        )
+                )
+                {
+                        return false;
+                }
+
+                return true;
+        }
+
+        /**
+         * Set the entire IRI. Returns true on success, false on failure (if there
+         * are any invalid characters).
+         *
+         * @param string $iri
+         * @return bool
+         */
+        public function set_iri($iri)
+        {
+                static $cache;
+                if (!$cache)
+                {
+                        $cache = array();
+                }
+
+                if ($iri === null)
+                {
+                        return true;
+                }
+                elseif (isset($cache[$iri]))
+                {
+                        list($this->scheme,
+                                 $this->iuserinfo,
+                                 $this->ihost,
+                                 $this->port,
+                                 $this->ipath,
+                                 $this->iquery,
+                                 $this->ifragment,
+                                 $return) = $cache[$iri];
+                        return $return;
+                }
+                else
+                {
+                        $parsed = $this->parse_iri((string) $iri);
+                        if (!$parsed)
+                        {
+                                return false;
+                        }
+
+                        $return = $this->set_scheme($parsed['scheme'])
+                                && $this->set_authority($parsed['authority'])
+                                && $this->set_path($parsed['path'])
+                                && $this->set_query($parsed['query'])
+                                && $this->set_fragment($parsed['fragment']);
+
+                        $cache[$iri] = array($this->scheme,
+                                                                 $this->iuserinfo,
+                                                                 $this->ihost,
+                                                                 $this->port,
+                                                                 $this->ipath,
+                                                                 $this->iquery,
+                                                                 $this->ifragment,
+                                                                 $return);
+                        return $return;
+                }
+        }
+
+        /**
+         * Set the scheme. Returns true on success, false on failure (if there are
+         * any invalid characters).
+         *
+         * @param string $scheme
+         * @return bool
+         */
+        public function set_scheme($scheme)
+        {
+                if ($scheme === null)
+                {
+                        $this->scheme = null;
+                }
+                elseif (!preg_match('/^[A-Za-z][0-9A-Za-z+\-.]*$/', $scheme))
+                {
+                        $this->scheme = null;
+                        return false;
+                }
+                else
+                {
+                        $this->scheme = strtolower($scheme);
+                }
+                return true;
+        }
+
+        /**
+         * Set the authority. Returns true on success, false on failure (if there are
+         * any invalid characters).
+         *
+         * @param string $authority
+         * @return bool
+         */
+        public function set_authority($authority)
+        {
+                static $cache;
+                if (!$cache)
+                        $cache = array();
+
+                if ($authority === null)
+                {
+                        $this->iuserinfo = null;
+                        $this->ihost = null;
+                        $this->port = null;
+                        return true;
+                }
+                elseif (isset($cache[$authority]))
+                {
+                        list($this->iuserinfo,
+                                 $this->ihost,
+                                 $this->port,
+                                 $return) = $cache[$authority];
+
+                        return $return;
+                }
+                else
+                {
+                        $remaining = $authority;
+                        if (($iuserinfo_end = strrpos($remaining, '@')) !== false)
+                        {
+                                $iuserinfo = substr($remaining, 0, $iuserinfo_end);
+                                $remaining = substr($remaining, $iuserinfo_end + 1);
+                        }
+                        else
+                        {
+                                $iuserinfo = null;
+                        }
+                        if (($port_start = strpos($remaining, ':', strpos($remaining, ']'))) !== false)
+                        {
+                                if (($port = substr($remaining, $port_start + 1)) === false)
+                                {
+                                        $port = null;
+                                }
+                                $remaining = substr($remaining, 0, $port_start);
+                        }
+                        else
+                        {
+                                $port = null;
+                        }
+
+                        $return = $this->set_userinfo($iuserinfo) &&
+                                          $this->set_host($remaining) &&
+                                          $this->set_port($port);
+
+                        $cache[$authority] = array($this->iuserinfo,
+                                                                           $this->ihost,
+                                                                           $this->port,
+                                                                           $return);
+
+                        return $return;
+                }
+        }
+
+        /**
+         * Set the iuserinfo.
+         *
+         * @param string $iuserinfo
+         * @return bool
+         */
+        public function set_userinfo($iuserinfo)
+        {
+                if ($iuserinfo === null)
+                {
+                        $this->iuserinfo = null;
+                }
+                else
+                {
+                        $this->iuserinfo = $this->replace_invalid_with_pct_encoding($iuserinfo, '!$&\'()*+,;=:');
+                        $this->scheme_normalization();
+                }
+
+                return true;
+        }
+
+        /**
+         * Set the ihost. Returns true on success, false on failure (if there are
+         * any invalid characters).
+         *
+         * @param string $ihost
+         * @return bool
+         */
+        public function set_host($ihost)
+        {
+                if ($ihost === null)
+                {
+                        $this->ihost = null;
+                        return true;
+                }
+                elseif (substr($ihost, 0, 1) === '[' && substr($ihost, -1) === ']')
+                {
+                        if (SimplePie_Net_IPv6::check_ipv6(substr($ihost, 1, -1)))
+                        {
+                                $this->ihost = '[' . SimplePie_Net_IPv6::compress(substr($ihost, 1, -1)) . ']';
+                        }
+                        else
+                        {
+                                $this->ihost = null;
+                                return false;
+                        }
+                }
+                else
+                {
+                        $ihost = $this->replace_invalid_with_pct_encoding($ihost, '!$&\'()*+,;=');
+
+                        // Lowercase, but ignore pct-encoded sections (as they should
+                        // remain uppercase). This must be done after the previous step
+                        // as that can add unescaped characters.
+                        $position = 0;
+                        $strlen = strlen($ihost);
+                        while (($position += strcspn($ihost, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ%', $position)) < $strlen)
+                        {
+                                if ($ihost[$position] === '%')
+                                {
+                                        $position += 3;
+                                }
+                                else
+                                {
+                                        $ihost[$position] = strtolower($ihost[$position]);
+                                        $position++;
+                                }
+                        }
+
+                        $this->ihost = $ihost;
+                }
+
+                $this->scheme_normalization();
+
+                return true;
+        }
+
+        /**
+         * Set the port. Returns true on success, false on failure (if there are
+         * any invalid characters).
+         *
+         * @param string $port
+         * @return bool
+         */
+        public function set_port($port)
+        {
+                if ($port === null)
+                {
+                        $this->port = null;
+                        return true;
+                }
+                elseif (strspn($port, '0123456789') === strlen($port))
+                {
+                        $this->port = (int) $port;
+                        $this->scheme_normalization();
+                        return true;
+                }
+                else
+                {
+                        $this->port = null;
+                        return false;
+                }
+        }
+
+        /**
+         * Set the ipath.
+         *
+         * @param string $ipath
+         * @return bool
+         */
+        public function set_path($ipath)
+        {
+                static $cache;
+                if (!$cache)
+                {
+                        $cache = array();
+                }
+
+                $ipath = (string) $ipath;
+
+                if (isset($cache[$ipath]))
+                {
+                        $this->ipath = $cache[$ipath][(int) ($this->scheme !== null)];
+                }
+                else
+                {
+                        $valid = $this->replace_invalid_with_pct_encoding($ipath, '!$&\'()*+,;=@:/');
+                        $removed = $this->remove_dot_segments($valid);
+
+                        $cache[$ipath] = array($valid, $removed);
+                        $this->ipath =  ($this->scheme !== null) ? $removed : $valid;
+                }
+
+                $this->scheme_normalization();
+                return true;
+        }
+
+        /**
+         * Set the iquery.
+         *
+         * @param string $iquery
+         * @return bool
+         */
+        public function set_query($iquery)
+        {
+                if ($iquery === null)
+                {
+                        $this->iquery = null;
+                }
+                else
+                {
+                        $this->iquery = $this->replace_invalid_with_pct_encoding($iquery, '!$&\'()*+,;=:@/?', true);
+                        $this->scheme_normalization();
+                }
+                return true;
+        }
+
+        /**
+         * Set the ifragment.
+         *
+         * @param string $ifragment
+         * @return bool
+         */
+        public function set_fragment($ifragment)
+        {
+                if ($ifragment === null)
+                {
+                        $this->ifragment = null;
+                }
+                else
+                {
+                        $this->ifragment = $this->replace_invalid_with_pct_encoding($ifragment, '!$&\'()*+,;=:@/?');
+                        $this->scheme_normalization();
+                }
+                return true;
+        }
+
+        /**
+         * Convert an IRI to a URI (or parts thereof)
+         *
+         * @return string
+         */
+        public function to_uri($string)
+        {
+                static $non_ascii;
+                if (!$non_ascii)
+                {
+                        $non_ascii = implode('', range("\x80", "\xFF"));
+                }
+
+                $position = 0;
+                $strlen = strlen($string);
+                while (($position += strcspn($string, $non_ascii, $position)) < $strlen)
+                {
+                        $string = substr_replace($string, sprintf('%%%02X', ord($string[$position])), $position, 1);
+                        $position += 3;
+                        $strlen += 2;
+                }
+
+                return $string;
+        }
+
+        /**
+         * Get the complete IRI
+         *
+         * @return string
+         */
+        public function get_iri()
+        {
+                if (!$this->is_valid())
+                {
+                        return false;
+                }
+
+                $iri = '';
+                if ($this->scheme !== null)
+                {
+                        $iri .= $this->scheme . ':';
+                }
+                if (($iauthority = $this->get_iauthority()) !== null)
+                {
+                        $iri .= '//' . $iauthority;
+                }
+                if ($this->ipath !== '')
+                {
+                        $iri .= $this->ipath;
+                }
+                elseif (!empty($this->normalization[$this->scheme]['ipath']) && $iauthority !== null && $iauthority !== '')
+                {
+                        $iri .= $this->normalization[$this->scheme]['ipath'];
+                }
+                if ($this->iquery !== null)
+                {
+                        $iri .= '?' . $this->iquery;
+                }
+                if ($this->ifragment !== null)
+                {
+                        $iri .= '#' . $this->ifragment;
+                }
+
+                return $iri;
+        }
+
+        /**
+         * Get the complete URI
+         *
+         * @return string
+         */
+        public function get_uri()
+        {
+                return $this->to_uri($this->get_iri());
+        }
+
+        /**
+         * Get the complete iauthority
+         *
+         * @return string
+         */
+        protected function get_iauthority()
+        {
+                if ($this->iuserinfo !== null || $this->ihost !== null || $this->port !== null)
+                {
+                        $iauthority = '';
+                        if ($this->iuserinfo !== null)
+                        {
+                                $iauthority .= $this->iuserinfo . '@';
+                        }
+                        if ($this->ihost !== null)
+                        {
+                                $iauthority .= $this->ihost;
+                        }
+                        if ($this->port !== null)
+                        {
+                                $iauthority .= ':' . $this->port;
+                        }
+                        return $iauthority;
+                }
+                else
+                {
+                        return null;
+                }
+        }
+
+        /**
+         * Get the complete authority
+         *
+         * @return string
+         */
+        protected function get_authority()
+        {
+                $iauthority = $this->get_iauthority();
+                if (is_string($iauthority))
+                        return $this->to_uri($iauthority);
+                else
+                        return $iauthority;
+        }
+}