--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/web/wp-includes/SimplePie/IRI.php Wed Dec 19 17:46:52 2012 -0800
@@ -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;
+ }
+}