Current File : /www/varak.net/wiki.varak.net/vendor/wikimedia/relpath/src/RelPath.php
<?php
/**
* Copyright (c) 2015 Ori Livneh <ori@wikimedia.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* @file
* @author Ori Livneh <ori@wikimedia.org>
*/
namespace RelPath;
/**
* Split a path into path components.
*
* @param string $path File path.
* @return array Array of path components.
*/
function splitPath( $path ) {
$fragments = array();
while ( true ) {
$cur = dirname( $path );
if ( $cur === $path || ( $cur === '.' && basename( $path ) === $path ) ) {
break;
}
$fragment = trim( substr( $path, strlen( $cur ) ), '/' );
if ( !$fragments ) {
$fragments[] = $fragment;
} elseif ( $fragment === '..' && basename( $cur ) !== '..' ) {
$cur = dirname( $cur );
} elseif ( $fragment !== '.' ) {
$fragments[] = $fragment;
}
$path = $cur;
}
if ( $path !== '' ) {
$fragments[] = trim( $path, '/' );
}
return array_reverse( $fragments );
}
/**
* Return a relative filepath to path either from the current directory or from
* an optional start directory. Both paths must be absolute.
*
* @param string $path File path.
* @param string $start Start directory. Optional; if not specified, the current
* working directory will be used.
* @return array|bool Array of path components or false if file does not exist.
*/
function getRelativePath( $path, $start = null ) {
if ( $start === null ) {
$start = getcwd();
}
if ( substr( $path, 0, 1 ) !== '/' || substr( $start, 0, 1 ) !== '/' ) {
return false;
}
$pathParts = splitPath( $path );
$countPathParts = count( $pathParts );
$startParts = splitPath( $start );
$countStartParts = count( $startParts );
$commonLength = min( $countPathParts, $countStartParts );
for ( $i = 0; $i < $commonLength; $i++ ) {
if ( $startParts[$i] !== $pathParts[$i] ) {
break;
}
}
$relList = ( $countStartParts > $i )
? array_fill( 0, $countStartParts - $i, '..' )
: array();
$relList = array_merge( $relList, array_slice( $pathParts, $i ) );
return implode( '/', $relList ) ?: '.';
}
/**
* Join path components.
*
* @param string $base Base path.
* @param string $path File path to join to base path.
* @return string
*/
function joinPath( $base, $path ) {
if ( substr( $path, 0, 1 ) === '/' ) {
return $path; // $path is absolute.
}
if ( substr( $base, 0, 1 ) !== '/' ) {
return false; // $base is relative.
}
$pathParts = splitPath( $path );
$resultParts = splitPath( $base );
while ( ( $part = array_shift( $pathParts ) ) !== null ) {
switch ( $part ) {
case '.':
break;
case '..':
if ( count( $resultParts ) > 1 ) {
array_pop( $resultParts );
}
break;
default:
$resultParts[] = $part;
break;
}
}
return implode( '/', $resultParts );
}
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