#

# Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

# All rights reserved.

# This component and the accompanying materials are made available

# under the terms of the License "Eclipse Public License v1.0"

# which accompanies this distribution, and is available

# at the URL "http://www.eclipse.org/legal/epl-v10.html".

#

# Initial Contributors:

# Nokia Corporation - initial contribution.

#

# Contributors:

#

# Description: 

# dos2unix - python version

# This module converts file from dos to unix i.e. replaces Dos/Windows EOL (CRLF) with Unix EOL (LF).

# example usage:

# dos2unix.py windowsFile.txt

#

import os

import re

import sys

import stat

#------------------------------------------------------------------------------

# Converts string from dos to unix i.e. replaces CRLF with LF as a line terminator (EOL)

#------------------------------------------------------------------------------

def convertDos2Unix(inputString):

    regExp = re.compile("\r\n|\n|\r")

    return regExp.sub("\n",inputString)

#------------------------------------------------------------------------------

# Validates input

#------------------------------------------------------------------------------

def validateInput(argv):

    if not(len(argv) > 1):

       print "Error No parameter given: fileName to convert."

       sys.exit();

#------------------------------------------------------------------------------

# Reads input file

#------------------------------------------------------------------------------

def readInputFile(fileName):

    inputFile = open(fileName, 'r')

    # read file content

    originalFileContent = inputFile.read()

    inputFile.close()

    return originalFileContent

#------------------------------------------------------------------------------

# Writes string to given file (in binary mode)

#------------------------------------------------------------------------------

def writeToBinaryFile(string,fileName):

    os.chmod(fileName, stat.S_IRWXU)

    outputFile = open(fileName, 'wb')

    outputFile.write(string)

    outputFile.close()

# Main script

#------------------------------------------------------------------------------

# Coverts dos/windows EOL to UNIX EOL (CRLF->LF) in given file

#------------------------------------------------------------------------------

def dos2unix(fileName):

    originalFileContent = readInputFile(fileName)

    convertedFileContent = convertDos2Unix(originalFileContent)

    writeToBinaryFile(convertedFileContent,fileName)