From df65d887876d767e605795ae00efd79922593705 Mon Sep 17 00:00:00 2001
From: scream3r <scream3r.org@gmail.com>
Date: Mon, 22 Apr 2013 09:59:59 +0400
Subject: [PATCH] Added 3 constants to SerialNativeInterface class, and made a
 little refactoring of SerialPort and SerialPortList classes

---
 src/java/jssc/SerialNativeInterface.java | 13 +++++++++++++
 src/java/jssc/SerialPort.java            |  6 +++---
 src/java/jssc/SerialPortList.java        |  2 +-
 3 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/src/java/jssc/SerialNativeInterface.java b/src/java/jssc/SerialNativeInterface.java
index 0138bf2..dff4a07 100644
--- a/src/java/jssc/SerialNativeInterface.java
+++ b/src/java/jssc/SerialNativeInterface.java
@@ -46,6 +46,19 @@ public class SerialNativeInterface {
 
     private static int osType = -1;
 
+    /**
+     * @since 2.3.0
+     */
+    public static final int ERR_PORT_BUSY = -1;
+    /**
+     * @since 2.3.0
+     */
+    public static final int ERR_PORT_NOT_FOUND = -2;
+    /**
+     * @since 2.3.0
+     */
+    public static final int ERR_PERMISSION_DENIED = -3;
+
     static {
         String libFolderPath;
         String libName;
diff --git a/src/java/jssc/SerialPort.java b/src/java/jssc/SerialPort.java
index 1b5455a..b719532 100644
--- a/src/java/jssc/SerialPort.java
+++ b/src/java/jssc/SerialPort.java
@@ -151,13 +151,13 @@ public class SerialPort {
         else {
             throw new SerialPortException(portName, "openPort()", SerialPortException.TYPE_NULL_NOT_PERMITTED);//since 2.1.0 -> NULL port name fix
         }
-        if(portHandle == -1){//since 0.9.0 ->
+        if(portHandle == SerialNativeInterface.ERR_PORT_BUSY){//since 0.9.0 ->
             throw new SerialPortException(portName, "openPort()", SerialPortException.TYPE_PORT_BUSY);
         }
-        else if(portHandle == -2){
+        else if(portHandle == SerialNativeInterface.ERR_PORT_NOT_FOUND){
             throw new SerialPortException(portName, "openPort()", SerialPortException.TYPE_PORT_NOT_FOUND);
         }//<- since 0.9.0
-        else if(portHandle == -3){//since 2.2.0 ->
+        else if(portHandle == SerialNativeInterface.ERR_PERMISSION_DENIED){//since 2.2.0 ->
             throw new SerialPortException(portName, "openPort()", SerialPortException.TYPE_PERMISSION_DENIED);
         }//<- since 2.2.0
         portOpened = true;
diff --git a/src/java/jssc/SerialPortList.java b/src/java/jssc/SerialPortList.java
index f3a0d03..021fc79 100644
--- a/src/java/jssc/SerialPortList.java
+++ b/src/java/jssc/SerialPortList.java
@@ -332,7 +332,7 @@ public class SerialPortList {
                         String portName = searchPath + fileName;
                         if(SerialNativeInterface.getOsType() ==  SerialNativeInterface.OS_LINUX){
                             int portHandle = serialInterface.openPort(portName, false);//Open port without TIOCEXCL
-                            if(portHandle < 0 && portHandle != -1){//If port handle == -1 it's mean that it's busy
+                            if(portHandle < 0 && portHandle != SerialNativeInterface.ERR_PORT_BUSY){//If port handle == -1 it's mean that it's busy
                                 continue;
                             }
                             else if(portHandle != -1) {