From 64d7a8bbe84719c88dee2457f32c82dd7380c018 Mon Sep 17 00:00:00 2001
From: Jason Woofenden <jason283@herkamire.com>
Date: Thu, 20 Nov 2008 21:50:35 -0500
Subject: [PATCH] Fixed format_decimal() to support negative numbers

---
 format.php |   15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/format.php b/format.php
index 900e781..395835d 100644
--- a/format.php
+++ b/format.php
@@ -45,7 +45,7 @@ function format_int($str) {
 	return ereg_replace('^0*([0-9])', '\1', $str);
 }
 
-function format_decimal($str) {
+function format_positive_decimal($str) {
 	$str = ereg_replace('[^0-9.]', '', $str);
 	$pos = strpos($str, '.');
 	if($pos !== false) {
@@ -61,6 +61,19 @@ function format_decimal($str) {
 	return $str;
 }
 
+function format_decimal($str) {
+	$str = ereg_replace('[^0-9.-]', '', $str);
+	if(substr($str, 0, 1) == '-') {
+		$str = format_positive_decimal(substr($str, 1));
+		if($str !== '' && $str !== '0' && $str != '0.0') {
+			$str = '-' . $str;
+		}
+		return $str;
+	} else {
+		return format_positive_decimal($str);
+	}
+}
+
 # return 0 of there's no digits
 function format_int_0($str) {
 	$str = format_int($str);
-- 
1.7.10.4