helly Wed Jul 16 16:18:33 2003 EDT
Added files:
/spl/examples filter.inc filter_tree.php sub_dir.inc
Log:
More examples
Index: spl/examples/filter.inc
+++ spl/examples/filter.inc
<?php
/**
* @brief Regular expression filter for string iterators
* @author Marcus Boerger
* @version 1.0
*
* Instances of this class act as a filter around iterators whose elements
* are strings. In other words you can put an iterator into the constructor
* and the instance will only return elements which match the given regular
* expression.
*/
class filter implements spl_forward
{
protected $it;
protected $regex;
protected $curr;
/**
* Constructs a filter around an iterator whose elemnts are strings.
* If the given iterator is of type spl_sequence then its rewind()
* method is called.
*
* @param it Object that implements at least spl_forward
* @patam regex Regular expression used as a filter.
*/
function __construct(spl_forward $it, $regex) {
if ($it instanceof spl_sequence) {
$it->rewind();
}
$this->it = $it;
$this->regex = $regex;
$this->fetch();
}
/**
* Destruct the iterator.
*/
function __destruct() {
unset($this->it);
}
/**
* Fetch next element and store it.
*
* @return void
*/
protected function fetch() {
$this->curr = false;
while ($this->it->has_more()) {
$curr = $this->it->current();
if (ereg($this->regex, $curr)) {
$this->curr = $curr;
return;
}
$this->it->next();
};
}
/**
* Move to next element
*
* @return void
*/
function next() {
$this->it->next();
$this->fetch();
}
/**
* @return Whether more elements are available
*/
function has_more() {
return $this->curr !== false;
}
/**
* @return The current value
*/
function current() {
return $this->curr;
}
/**
* hidden __clone
*/
protected function __clone() {
// disallow clone
}
}
?>
Index: spl/examples/filter_tree.php
+++ spl/examples/filter_tree.php
<?php
/* tree view example
*
* Usage: php filter_tree.php <path> <regex>
*
* Simply specify the path to tree with parameter <path>.
* The regular expression <regex> is used to filter the tree.
*
* (c) Marcus Boerger
*/
require_once("sub_dir.inc");
require_once("filter.inc");
foreach(new filter(new sub_dir($argv[1]), $argv[2]) as $f) {
echo "$f\n";
}
?>
Index: spl/examples/sub_dir.inc
+++ spl/examples/sub_dir.inc
<?php
/**
* @brief Subdirectory aware directory iterator.
* @author Marcus Boerger
* @version 1.0
*
* This directory iterator recursively returns all files and directories
* within a given path.
*/
class sub_dir implements spl_sequence
{
protected $adir = array();
protected $cnt = 0;
protected $path = "";
protected $curr = "";
protected $nodots = true;
/**
* Construct a directory from a path.
*
* @param path The path to iterate.
* @param nodots Whether or not to display the entries '.' and '..'.
*/
function __construct($path, $nodots = true) {
$this->cnt = 0;
$this->path = $path;
}
/**
* Rewind the directory.
*
* @return void
*/
function rewind() {
while($this->cnt) {
unset($this->adir[$this->cnt--]);
}
$dir = new spl_dir($this->path);
$dir->path = "";
$this->adir[1] = $dir;
$this->cnt = 1;
if ($this->nodots) {
while ($this->has_more()) {
$ent = $this->current();
if ($ent != '.' && $ent != '..') {
break;
}
$this->next();
}
}
}
/**
* Move to net dir or file entry.
*
* @return void
*/
function next() {
if ($this->cnt) {
$dir = $this->adir[$this->cnt];
$ent = $dir->current();
$path = $dir->get_path().'/'.$ent;
if ($ent != '.' && $ent != '..' && is_dir($path)) {
$new = new spl_dir($path);
$new->path = $dir->path.$ent.'/';
$new->cnt = $this->cnt++;
$this->adir[$this->cnt] = $new;
if ($this->nodots) {
while ($new->has_more()) {
$ent = $new->current();
if ($ent != '.' && $ent != '..') {
break;
}
$new->next();
}
}
}
$dir->next();
}
}
/**
* @return Whether more dirs or files entries are available.
*/
function has_more() {
while ($this->cnt) {
$dir = $this->adir[$this->cnt];
if ($dir->has_more()) {
return true;
}
unset($this->adir[$this->cnt--]);
}
return false;
}
/**
* @return The current dir or file entry.
*/
function current() {
if ($this->cnt) {
$dir = $this->adir[$this->cnt];
return $dir->path . $dir->current();
}
throw new exception("No more elements available");
}
/**
* Hidden __clone
*/
protected function __clone() {
// disallow clone
}
}
?>
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