From dca2691f83365aa3f7a953b4c11c89ce2d76c5ce Mon Sep 17 00:00:00 2001
From: Christian Weber
Date: Tue, 18 Sep 2007 16:23:55 +0000
Subject: add getopt() and gets(), remove obsolet dba_version()

---
 it.class | 135 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 126 insertions(+), 9 deletions(-)

diff --git a/it.class b/it.class
index 9595080..95bb2f7 100644
--- a/it.class
+++ b/it.class
@@ -23,6 +23,10 @@
 
 class it
 {
+	static $stdin_args = array();
+	static $stdin = null;
+	static $stdin_filename = "";
+	static $stdin_line = 0;
 
 /**
  * Clone an object and return copy, works for all PHP versions
@@ -183,15 +187,6 @@ function bail($message = "Bailed.\n")
 }
 
 
-/**
- * Return "db4" or "db2" depending on availability
- */
-function dba_handler()
-{
-	return in_array("db4", dba_handlers()) ? "db4" : "db2";
-}
-
-
 /**
  * Convert a string to ASCII-only chars, map/strip ISO-8859-1 accents
  * @param $text Text to convert
@@ -377,6 +372,7 @@ function _exec_quotevalue($value)
 	return escapeshellarg($result);
 }
 
+
 /**
  * Convert an image to a given size and type (ensures input is an image)
  * @param $p['in']	Input filename (mandatory)
@@ -398,6 +394,127 @@ function imageconvert($p)
 	return $result;
 }
 
+
+/**
+ * Parse command line options with Usage given as template. Example:
+ * Usage: myprogram.php [OPTIONS] PATTERN
+ *  -s, --short      Use short ouput
+ *  -f, --file=FILE  Use FILE for input
+ *  -x EXTENSION     Ignore EXTENSION
+ * Value always stored in long opt. Use double blank before explanation. Non-option text ignored.
+ * Mandatory non-option arguments are stored under their lowercased name.
+ * @param $helplines Usage parsed to determine options
+ * @return Associative array of opts: Boolean options are set to true, remaining args returned in 'args'
+ */
+function getopt($helplines)
+{
+	$result = array('args' => array());
+
+	if ($indentation = it::match('^\s+', $helplines))
+		$helplines = it::replace($indentation => "\n", $helplines);
+
+	foreach(explode("\n", trim($helplines)) as $helpline)
+	{
+		$shortoptname = $shortoptarg = $longoptname = $longoptarg = "";
+		foreach (explode(',', $helpline) as $optdesc)
+		{
+			$optdesc = trim($optdesc);
+			if ($matches = (array)it::match('^--(\w[\w-]*)(=[A-Z])?', $optdesc))
+				list($longoptname, $longoptarg) = $matches;
+			elseif ($matches = (array)it::match('^-(\w)( [A-Z])?', $optdesc))
+				list($shortoptname, $shortoptarg) = $matches;
+		}	
+
+		if ($longoptname || $shortoptname)
+		{
+			if ($longoptname && $shortoptname)
+				$alias[$shortoptname] = $longoptname;
+
+			$witharg[$longoptname ? $longoptname : $shortoptname] = $longoptarg || $shortoptarg;
+		}
+	}
+
+	$mandatoryargs = array();
+	if ($tmp = trim(it::replace("\n.*" => "", "^\S+\s+\S+\s*" => "", "\[.*?\]\s*" => "", trim($helplines))))
+		$mandatoryargs = preg_split('/\s+/', $tmp);
+
+	foreach (array_slice($_SERVER['argv'], 1) as $arg)
+	{
+		if ($eat)
+		{
+			if (it::match('^--?\w', $arg))	# Already next option => Missing argument?
+				$err = true;
+			else
+				$result[array_shift($eat)] = $arg;
+		}
+		elseif ($matches = (array)it::match('^--(\w[\w-]*)(=\S*)?', $arg))
+		{
+			list($optname, $val) = $matches;
+			if (!isset($witharg[$optname]) || isset($val) && !$witharg[$optname])
+				$err = true;
+			else if($witharg[$optname] && !$val)
+				$eat[] = $optname;
+			else
+				$result[$optname] = $val ? substr($val, 1) : true;
+		}
+		else if ($letters = it::match('^-(\w+)', $arg))
+		{
+			foreach (str_split($letters, 1) as $letter)
+			{
+				$optname = $alias[$letter] ? $alias[$letter] : $letter;
+				if ($witharg[$optname])
+					$eat[] = $optname;
+				else if (!isset($witharg[$optname]))
+					$err = true;
+				else
+					$result[$optname] = true;
+			}
+		}
+		elseif($mandatoryargs)
+			$result[strtolower(array_shift($mandatoryargs))] = $arg;
+		else
+			$result['args'][] = $arg;
+	}
+
+	if ($err || $eat || $result['h'] || $result['help'] || $mandatoryargs)
+	{
+		fputs(($result['h'] || $result['help'] ? STDOUT : STDERR), trim($helplines) . "\n");
+		exit(1);
+	}
+
+	it::$stdin_args = $result['args'] ? $result['args'] : array("-");
+	it::_stdin_next();
+
+	return $result;
+}
+
+function _stdin_next()
+{
+	if ($result = it::$stdin_args)
+	{
+		it::$stdin_filename = array_shift(it::$stdin_args);
+		it::$stdin = (it::$stdin_filename == "-") ? STDIN : @fopen(it::$stdin_filename, "r");
+		it::$stdin_line = 0;
+	}
+
+	return $result;
+}
+
+/**
+ * Get one line from stdin (or files given on command line) a la Perl <>.
+ * Note: You need to call getopt() before using this function.
+ * @return Line (including newline) or false on eof
+ */
+function gets()
+{
+	do {
+		$result = fgets(it::$stdin);
+	} while (($result === false) && it::_stdin_next());
+
+	it::$stdin_line++;
+	return $result;
+}
+
 }
 
 ?>
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