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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
// +----------------------------------------------------------------------+
// | PHP version 4.0 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997, 1998, 1999, 2000, 2001 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Andrei Zmievski <andrei@ispi.net> |
// +----------------------------------------------------------------------+
//
// $Id$
require_once 'PEAR.php';
/**
* Command-line options parsing class.
*
* @author Andrei Zmievski <andrei@ispi.net>
*
*/
class Console_Getopt {
/**
* Parses the command-line options.
*
* The first parameter to this function should be the list of command-line
* arguments without the leading reference to the running program.
*
* The second parameter is a string of allowed short options. Each of the
* option letters can be followed by a colon ':' to specify that the option
* requires an argument, or a double colon '::' to specify that the option
* takes an optional argument.
*
* The third argument is an optional array of allowed long options. The
* leading '--' should not be included in the option name. Options that
* require an argument should be followed by '=', and options that take an
* option argument should be followed by '=='.
*
* The return value is an array of two elements: the list of parsed
* options and the list of non-option command-line arguments. Each entry in
* the list of parsed options is a pair of elements - the first one
* specifies the option, and the second one specifies the option argument,
* if there was one.
*
* Long and short options can be mixed.
*
* Most of the semantics of this function are based on GNU getopt_long().
*
* @param $args array an array of command-line arguments
* @param $short_options string specifies the list of allowed short options
* @param $long_options array specifies the list of allowed long options
*
* @return array two-element array containing the list of parsed options and
* the non-option arguments
*
* @access public
*
*/
function getopt($args, $short_options, $long_options = null)
{
$opts = array();
$non_opts = array();
settype($args, 'array');
if ($long_options)
sort($long_options);
reset($args);
while (list(, $arg) = each($args)) {
/* The special element '--' means explicit end of options. Treat the
rest of the arguments as non-options and end the loop. */
if ($arg == '--') {
$non_opts = array_merge($non_opts, array_slice($args, $i + 1));
break;
}
if ($arg{0} != '-' || ($arg{1} == '-' && !$long_options)) {
$non_opts[] = $arg;
} else if ($arg{1} == '-') {
$error = Console_Getopt::_parseLongOption(substr($arg, 2), $long_options, $opts, $args);
if (PEAR::isError($error))
return $error;
} else {
$error = Console_Getopt::_parseShortOption(substr($arg, 1), $short_options, $opts, $args);
if (PEAR::isError($error))
return $error;
}
}
return array($opts, $non_opts);
}
/**
* @access private
*
*/
function _parseShortOption($arg, $short_options, &$opts, &$args)
{
for ($i = 0; $i < strlen($arg); $i++) {
$opt = $arg{$i};
$opt_arg = null;
/* Try to find the short option in the specifier string. */
if (($spec = strstr($short_options, $opt)) === false || $arg{$i} == ':')
{
return new Getopt_Error("unrecognized option -- $opt\n");
}
if ($spec{1} == ':') {
if ($spec{2} == ':') {
if ($i + 1 < strlen($arg)) {
/* Option takes an optional argument. Use the remainder of
the arg string if there is anything left. */
$opts[] = array($opt, substr($arg, $i + 1));
break;
}
} else {
/* Option requires an argument. Use the remainder of the arg
string if there is anything left. */
if ($i + 1 < strlen($arg)) {
$opts[] = array($opt, substr($arg, $i + 1));
break;
} else if (list(, $opt_arg) = each($args))
/* Else use the next argument. */;
else
return new Getopt_Error("option requires an argument -- $opt\n");
}
}
$opts[] = array($opt, $opt_arg);
}
}
/**
* @access private
*
*/
function _parseLongOption($arg, $long_options, &$opts, &$args)
{
list($opt, $opt_arg) = explode('=', $arg);
$opt_len = strlen($opt);
for ($i = 0; $i < count($long_options); $i++) {
$long_opt = $long_options[$i];
$opt_start = substr($long_opt, 0, $opt_len);
/* Option doesn't match. Go on to the next one. */
if ($opt_start != $opt)
continue;
$opt_rest = substr($long_opt, $opt_len);
/* Check that the options uniquely matches one of the allowed
options. */
if ($opt_rest != '' && $opt{0} != '=' &&
$i + 1 < count($long_options) &&
$opt == substr($long_options[$i+1], 0, $opt_len)) {
return new Getopt_Error("option --$opt is ambiguous\n");
}
if (substr($long_opt, -1) == '=') {
if (substr($long_opt, -2) != '==') {
/* Long option requires an argument.
Take the next argument if one wasn't specified. */;
if (!$opt_arg && !(list(, $opt_arg) = each($args))) {
return new Getopt_Error("option --$opt requires an argument\n");
}
}
} else if ($opt_arg) {
return new Getopt_Error("option --$opt doesn't allow an argument\n");
}
$opts[] = array('--' . $opt, $opt_arg);
return;
}
return new Getopt_Error("unrecognized option --$opt\n");
}
}
class Getopt_Error extends PEAR_Error {
var $classname = 'Getopt';
var $error_message_prepend = 'Error in Getopt';
function Getopt_Error($message, $code = 0, $mode = PEAR_ERROR_RETURN, $level = E_USER_NOTICE)
{
$this->PEAR_Error($message, $code, $mode, $level);
}
}
?>
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