/*
 * Copyright (c) 1998,1999,2000,2001,2002 Tal Davidson. All rights reserved.
 *
 * astyle_main.cpp
 * Copyright (c) 1998,1999,2000 Tal Davidson (davidsont@bigfoot.com). All rights reserved.
 *
 * This file is a part of "Artistic Style" - an indentater and reformatter
 * of C, C++, C# and Java source files.
 *
 * The "Artistic Style" project, including all files needed to compile it,
 * is free software; you can redistribute it and/or use it and/or modify it
 * under the terms of the GNU General Public License as published 
 * by the Free Software Foundation; either version 2 of the License, 
 * or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program.
 *
 */

#include "compiler_defines.h"
#include "astyle.h"

#include <iostream>
#include <fstream>
#include <stdio.h>
#include <cstdlib>
#include <cstring>


#define IS_OPTION(arg,op)          ((arg).compare(op)==0)
#define IS_OPTIONS(arg,a,b)        (IS_OPTION((arg),(a)) || IS_OPTION((arg),(b)))

#define IS_PARAM_OPTION(arg,op)    ((arg).COMPARE(0, strlen(op) , string(op))==0)
#define IS_PARAM_OPTIONS(arg,a,b)  (IS_PARAM_OPTION((arg),(a)) || IS_PARAM_OPTION((arg),(b)))

#define GET_PARAM(arg,op)          ((arg).substr(strlen(op)))
#define GET_PARAMS(arg,a,b)        (IS_PARAM_OPTION((arg),(a)) ? GET_PARAM((arg),(a)) : GET_PARAM((arg),(b)))


#ifdef USES_NAMESPACE
using namespace std;
using namespace astyle;
#endif

// default options:
ostream *_err = &cerr;
string _suffix = ".orig";
bool _modeManuallySet;

const string _version = "1.15.3";


class ASStreamIterator :
            public ASSourceIterator
{
    public:
        ASStreamIterator(istream *in);
        virtual ~ASStreamIterator();
        bool hasMoreLines() const;
        string nextLine();

    private:
        istream * inStream;
        char buffer[2048];
};

ASStreamIterator::ASStreamIterator(istream *in)
{
    inStream = in;
}

ASStreamIterator::~ASStreamIterator()
{
    delete inStream;
}


bool ASStreamIterator::hasMoreLines() const
{
    if (*inStream)
        return true;
    else
        return false;
}

/*
string ASStreamIterator::nextLine()
{
   char theInChar;
   char peekedChar;
   int  theBufferPosn = 0;
 
   //
   // treat '\n', '\r', '\n\r' and '\r\n' as an endline.
   //
   while (theBufferPosn < 2047 && inStream->get(theInChar))
   // while not eof
   {
      if (theInChar != '\n' && theInChar != '\r')
      {
	 buffer[theBufferPosn] = theInChar;
         theBufferPosn++;
      }
      else
      {
	peekedChar = inStream->peek();
	if (peekedChar != theInChar && (peekedChar == '\r' || peekedChar == '\n') )
         {
            inStream->get(theInChar);
         }
         break;
      }
   }
   buffer[theBufferPosn] = '\0';
 
   return string(buffer);
}
*/


string ASStreamIterator::nextLine()
{
    char *srcPtr;
    char *filterPtr;

    inStream->getline(buffer, 2047);
    srcPtr = filterPtr = buffer;

    while (*srcPtr != 0)
    {
        if (*srcPtr != '\r')
            *filterPtr++ = *srcPtr;
        srcPtr++;
    }
    *filterPtr = 0;

    return string(buffer);
}



void error(const char *why, const char* what)
{
    (*_err) << why << ' ' << what <<'\n';
    exit(1);
}

/* local function defined later in file as used. Insert forward declaration instead of rearrange file. */
bool parseOption(ASFormatter &formatter, const string &arg, const string &errorInfo);

template<class ITER>
bool parseOptions(ASFormatter &formatter,
                  const ITER &optionsBegin,
                  const ITER &optionsEnd,
                  const string &errorInfo)
{
    ITER option;
    bool ok = true;
    string arg, subArg;

    for (option = optionsBegin; option != optionsEnd; ++option)
    {
        arg = *option; //string(*option);

        if (arg.COMPARE(0, 2, string("--")) == 0)
            ok &= parseOption(formatter, arg.substr(2), errorInfo);
        else if (arg[0] == '-')
        {
            int i;

            for (i=1; i < arg.length(); ++i)
            {
                if (isalpha(arg[i]) && i > 1)
                {
                    ok &= parseOption(formatter, subArg, errorInfo);
                    subArg = "";
                }
                subArg.append(1, arg[i]);
            }
            ok &= parseOption(formatter, subArg, errorInfo);
            subArg = "";
        }
        else
        {
            ok &= parseOption(formatter, arg, errorInfo);
            subArg = "";
        }
    }

    return ok;
}

void manuallySetJavaStyle(ASFormatter &formatter)
{
    formatter.setJavaStyle();
    _modeManuallySet = true;
}

void manuallySetCStyle(ASFormatter &formatter)
{
    formatter.setCStyle();
    _modeManuallySet = true;
}


bool parseOption(ASFormatter &formatter, const string &arg, const string &errorInfo)
{
    if ( IS_PARAM_OPTION(arg, "suffix=") )
    {
        string suffixParam = GET_PARAM(arg, "suffix=");
        if (suffixParam.length() > 0)
            _suffix = suffixParam;
    }
    else if ( IS_OPTION(arg ,"style=ansi") )
    {
        formatter.setBracketIndent(false);
        formatter.setSpaceIndentation(4);
        formatter.setBracketFormatMode(BREAK_MODE);
        formatter.setClassIndent(false);
        formatter.setSwitchIndent(false);
        formatter.setNamespaceIndent(false);
    }
    else if ( IS_OPTION(arg ,"style=gnu") )
    {
        formatter.setBlockIndent(true);
        formatter.setSpaceIndentation(2);
        formatter.setBracketFormatMode(BREAK_MODE);
        formatter.setClassIndent(false);
        formatter.setSwitchIndent(false);
        formatter.setNamespaceIndent(false);
    }
    else if ( IS_OPTION(arg ,"style=java") )
    {
        manuallySetJavaStyle(formatter);
        formatter.setBracketIndent(false);
        formatter.setSpaceIndentation(4);
        formatter.setBracketFormatMode(ATTACH_MODE);
        formatter.setSwitchIndent(false);
    }
    else if ( IS_OPTION(arg ,"style=kr") )
    {
        //manuallySetCStyle(formatter);
        formatter.setBracketIndent(false);
        formatter.setSpaceIndentation(4);
        formatter.setBracketFormatMode(ATTACH_MODE);
        formatter.setClassIndent(false);
        formatter.setSwitchIndent(false);
        formatter.setNamespaceIndent(false);
    }
    else if ( IS_OPTION(arg ,"style=linux") )
    {
        formatter.setBracketIndent(false);
        formatter.setSpaceIndentation(8);
        formatter.setBracketFormatMode(BDAC_MODE);
        formatter.setClassIndent(false);
        formatter.setSwitchIndent(false);
        formatter.setNamespaceIndent(false);
    }
    else if ( IS_OPTIONS(arg ,"c", "mode=c") )
    {
        manuallySetCStyle(formatter);
    }
    else if ( IS_OPTIONS(arg ,"j", "mode=java") )
    {
        manuallySetJavaStyle(formatter);
    }
    else if ( IS_OPTIONS(arg, "t", "indent=tab=") )
    {
        int spaceNum = 4;
        string spaceNumParam = GET_PARAMS(arg, "t", "indent=tab=");
        if (spaceNumParam.length() > 0)
            spaceNum = atoi(spaceNumParam.c_str());
        formatter.setTabIndentation(spaceNum, false);
    }
    else if ( IS_OPTIONS(arg, "T", "force-indent=tab=") )
    {
        int spaceNum = 4;
        string spaceNumParam = GET_PARAMS(arg, "T", "force-indent=tab=");
        if (spaceNumParam.length() > 0)
            spaceNum = atoi(spaceNumParam.c_str());
        formatter.setTabIndentation(spaceNum, true);
    }
    else if ( IS_PARAM_OPTION(arg, "indent=tab") )
    {
        formatter.setTabIndentation(4);
    }
    else if ( IS_PARAM_OPTIONS(arg, "s", "indent=spaces=") )
    {
        int spaceNum = 4;
        string spaceNumParam = GET_PARAMS(arg, "s", "indent=spaces=");
        if (spaceNumParam.length() > 0)
            spaceNum = atoi(spaceNumParam.c_str());
        formatter.setSpaceIndentation(spaceNum);
    }
    else if ( IS_PARAM_OPTION(arg, "indent=spaces") )
    {
        formatter.setSpaceIndentation(4);
    }
    else if ( IS_PARAM_OPTIONS(arg, "m", "min-conditional-indent=") )
    {
        int minIndent = 0;
        string minIndentParam = GET_PARAMS(arg, "m", "min-conditional-indent=");
        if (minIndentParam.length() > 0)
            minIndent = atoi(minIndentParam.c_str());
        formatter.setMinConditionalIndentLength(minIndent);
    }
    else if ( IS_PARAM_OPTIONS(arg, "M", "max-instatement-indent=") )
    {
        int maxIndent = 40;
        string maxIndentParam = GET_PARAMS(arg, "M", "max-instatement-indent=");
        if (maxIndentParam.length() > 0)
            maxIndent = atoi(maxIndentParam.c_str());
        formatter.setMaxInStatementIndentLength(maxIndent);
    }
    else if ( IS_OPTIONS(arg, "B", "indent-brackets") )
    {
        formatter.setBracketIndent(true);
    }
    else if ( IS_OPTIONS(arg, "G", "indent-blocks") )
    {
        formatter.setBlockIndent(true);
    }
    else if ( IS_OPTIONS(arg, "N", "indent-namespaces") )
    {
        formatter.setNamespaceIndent(true);
    }
    else if ( IS_OPTIONS(arg, "C", "indent-classes") )
    {
        formatter.setClassIndent(true);
    }
    else if ( IS_OPTIONS(arg, "S", "indent-switches") )
    {
        formatter.setSwitchIndent(true);
    }
    else if ( IS_OPTIONS(arg, "K", "indent-cases") )
    {
        formatter.setCaseIndent(true);
    }
    else if ( IS_OPTIONS(arg, "L", "indent-labels") )
    {
        formatter.setLabelIndent(true);
    }
    else if ( IS_OPTION(arg, "brackets=break-closing-headers") )
    {
        formatter.setBreakClosingHeaderBracketsMode(true);
    }
    else if ( IS_OPTIONS(arg, "b", "brackets=break") )
    {
        formatter.setBracketFormatMode(BREAK_MODE);
    }
    else if ( IS_OPTIONS(arg, "a", "brackets=attach") )
    {
        formatter.setBracketFormatMode(ATTACH_MODE);
    }
    else if ( IS_OPTIONS(arg, "l", "brackets=linux") )
    {
        formatter.setBracketFormatMode(BDAC_MODE);
    }
    else if ( IS_OPTIONS(arg, "O", "one-line=keep-blocks") )
    {
        formatter.setBreakOneLineBlocksMode(false);
    }
    else if ( IS_OPTIONS(arg, "o", "one-line=keep-statements") )
    {
        formatter.setSingleStatementsMode(false);
    }
    else if ( IS_OPTION(arg, "pad=paren") )
    {
        formatter.setParenthesisPaddingMode(true);
    }
    else if ( IS_OPTIONS(arg, "P", "pad=all") )
    {
        formatter.setOperatorPaddingMode(true);
        formatter.setParenthesisPaddingMode(true);
    }
    else if ( IS_OPTIONS(arg, "p", "pad=oper") )
    {
        formatter.setOperatorPaddingMode(true);
    }
    else if ( IS_OPTIONS(arg, "E", "fill-empty-lines") )
    {
        formatter.setEmptyLineFill(true);
    }
    else if (IS_OPTION(arg, "indent-preprocessor"))
    {
        formatter.setPreprocessorIndent(true);
    }
    else if (IS_OPTION(arg, "convert-tabs"))
    {
        formatter.setTabSpaceConversionMode(true);
    }
    else if (IS_OPTION(arg, "break-blocks=all"))
    {
        formatter.setBreakBlocksMode(true);
        formatter.setBreakClosingHeaderBlocksMode(true);
    }
    else if (IS_OPTION(arg, "break-blocks"))
    {
        formatter.setBreakBlocksMode(true);
    }
    else if (IS_OPTION(arg, "break-elseifs"))
    {
        formatter.setBreakElseIfsMode(true);
    }
    else if ( IS_OPTIONS(arg, "X", "errors-to-standard-output") )
    {
        _err = &cout;
    }
    else if ( IS_OPTIONS(arg ,"v", "version") )
    {
        (*_err) << "Artistic Style " << _version << endl;
        exit(1);
    }
    else
    {
        (*_err) << errorInfo << arg << endl;
        return false; // unknown option
    }



    return true; //o.k.
}



void importOptions(istream &in, vector<string> &optionsVector)
{
    char ch;
    string currentToken;

    while (in)
    {
        currentToken = "";
        do
        {
            in.get(ch);

            // treat '#' as line comments
            if (ch == '#')
                while (in)
                {
                    in.get(ch);
                    if (ch == '\n')
                        break;
                }

            // break options on spaces, tabs or new-lines
            if (ch == ' ' || ch == '\t' || ch == '\n')
                break;
            else
                currentToken.append(1, ch);

        }
        while (in);

        if (currentToken.length() != 0)
            optionsVector.push_back(currentToken);
    }
}

bool stringEndsWith(const string &str, const string &suffix)
{
    int strIndex = str.length() - 1;
    int suffixIndex = suffix.length() - 1;

    while (strIndex >= 0 && suffixIndex >= 0)
    {
        if (tolower(str[strIndex]) != tolower(suffix[suffixIndex]))
            return false;

        --strIndex;
        --suffixIndex;
    }

    return true;
}

void printHelp()
{
    (*_err) << endl;
    (*_err) << "Artistic Style " << _version << "   (http://www.bigfoot.com/~davidsont/astyle)\n";
    (*_err) << "                       (created by Tal Davidson, davidsont@bigfoot.com)\n";
    (*_err) << endl;
    (*_err) << "Usage  :  astyle [options] < Original > Beautified\n";
    (*_err) << "          astyle [options] Foo.cpp Bar.cpp  [...]\n";
    (*_err) << endl;
    (*_err) << "When indenting a specific file, the resulting indented file RETAINS the\n";
    (*_err) << "original file-name. The original pre-indented file is renamed, with a\n";
    (*_err) << "suffix of \".orig\" added to the original filename.\n";
    (*_err) << endl;
    (*_err) << "By default, astyle is set up to indent C/C++/C# files, with 4 spaces per\n" ;
    (*_err) << "indent, a maximal indentation of 40 spaces inside continuous statements,\n";
    (*_err) << "and NO formatting.\n";
    (*_err) << endl;
    (*_err) << "Option's Format:\n";
    (*_err) << "----------------\n";
    (*_err) << "    Long options (starting with '--') must be written one at a time.\n";
    (*_err) << "    Short options (starting with '-') may be appended together.\n";
    (*_err) << "    Thus, -bps4 is the same as -b -p -s4.\n";
    (*_err) << endl;
    (*_err) << "Predefined Styling options:\n";
    (*_err) << "--------------------\n";
    (*_err) << "    --style=ansi\n";
    (*_err) << "    ANSI style formatting/indenting.\n";
    (*_err) << endl;
    (*_err) << "    --style=kr\n";
    (*_err) << "    Kernighan&Ritchie style formatting/indenting.\n";
    (*_err) << endl;
    (*_err) << "    --style=gnu\n";
    (*_err) << "    GNU style formatting/indenting.\n";
    (*_err) << endl;
    (*_err) << "    --style=java\n";
    (*_err) << "    Java mode, with standard java style formatting/indenting.\n";
    (*_err) << endl;
    (*_err) << "    --style=linux\n";
    (*_err) << "    Linux mode (i.e. 8 spaces per indent, break definition-block\n";
    (*_err) << "    brackets but attach command-block brackets.\n";
    (*_err) << endl;
    (*_err) << "Indentation options:\n";
    (*_err) << "--------------------\n";
    (*_err) << "    -c   OR   --mode=c\n";
    (*_err) << "    Indent a C, C++ or C# source file (default)\n";
    (*_err) << endl;
    (*_err) << "    -j   OR   --mode=java\n";
    (*_err) << "    Indent a Java(TM) source file\n";
    (*_err) << endl;
    (*_err) << "    -s   OR   -s#   OR   --indent=spaces=#\n";
    (*_err) << "    Indent using # spaces per indent. Not specifying #\n" ;
    (*_err) << "    will result in a default of 4 spacec per indent.\n" ;
    (*_err) << endl;
    (*_err) << "    -t   OR   -t#   OR   --indent=tab=#\n";
    (*_err) << "    Indent using tab characters, assuming that each\n";
    (*_err) << "    tab is # spaces long. Not specifying # will result\n";
    (*_err) << "    in a default assumption of 4 spaces per tab.\n" ;
    (*_err) << endl;
    (*_err) << "    -T#   OR   --force-indent=tab=#";
    (*_err) << "    Indent using tab characters, assuming that each\n";
    (*_err) << "    tab is # spaces long. Force tabs to be used in areas\n";
    (*_err) << "    Astyle would prefer to use spaces.\n" ;
    (*_err) << endl;
    (*_err) << "    -C   OR   --indent-classes\n";
    (*_err) << "    Indent 'class' blocks, so that the inner 'public:',\n";
    (*_err) << "    'protected:' and 'private: headers are indented in\n";
    (*_err) << "    relation to the class block.\n";
    (*_err) << endl;
    (*_err) << "    -S   OR   --indent-switches\n";
    (*_err) << "    Indent 'switch' blocks, so that the inner 'case XXX:'\n";
    (*_err) << "    headers are indented in relation to the switch block.\n";
    (*_err) << endl;
    (*_err) << "    -K   OR   --indent-cases\n";
    (*_err) << "    Indent 'case XXX:' lines, so that they are flush with\n";
    (*_err) << "    their bodies..\n";
    (*_err) << endl;
    (*_err) << "    -N   OR   --indent-namespaces\n";
    (*_err) << "    Indent the contents of namespace blocks.\n";
    (*_err) << endl;
    (*_err) << "    -B   OR   --indent-brackets\n";
    (*_err) << "    Add extra indentation to '{' and '}' block brackets.\n";
    (*_err) << endl;
    (*_err) << "    -G   OR   --indent-blocks\n";
    (*_err) << "    Add extra indentation entire blocks (including brackets).\n";
    (*_err) << endl;
    (*_err) << "    -L   OR   --indent-labels\n";
    (*_err) << "    Indent labels so that they appear one indent less than\n";
    (*_err) << "    the current indentation level, rather than being\n";
    (*_err) << "    flushed completely to the left (which is the default).\n";
    (*_err) << endl;
    (*_err) << "    -m#  OR  --min-conditional-indent=#\n";
    (*_err) << "    Indent a minimal # spaces in a continuous conditional\n";
    (*_err) << "    belonging to a conditional header.\n";
    (*_err) << endl;
    (*_err) << "    -M#  OR  --max-instatement-indent=#\n";
    (*_err) << "    Indent a maximal # spaces in a continuous statement,\n";
    (*_err) << "    relatively to the previous line.\n";
    (*_err) << endl;
    (*_err) << "    -E  OR  --fill-empty-lines\n";
    (*_err) << "    Fill empty lines with the white space of their\n";
    (*_err) << "    previous lines.\n";
    (*_err) << endl;
    (*_err) << "    --indent-preprocessor\n";
    (*_err) << "    Indent multi-line #define statements\n";
    (*_err) << endl;
    (*_err) << "Formatting options:\n";
    (*_err) << "-------------------\n";
    (*_err) << "    -b  OR  --brackets=break\n";
    (*_err) << "    Break brackets from pre-block code (i.e. ANSI C/C++ style).\n";
    (*_err) << endl;
    (*_err) << "    -a  OR  --brackets=attach\n";
    (*_err) << "    Attach brackets to pre-block code (i.e. Java/K&R style).\n";
    (*_err) << endl;
    (*_err) << "    -l  OR  --brackets=linux\n";
    (*_err) << "    Break definition-block brackets and attach command-block\n";
    (*_err) << "    brackets.\n";
    (*_err) << endl;
    (*_err) << "    --brackets=break-closing-headers\n";
    (*_err) << "    Break brackets before closing headers (e.g. 'else', 'catch', ..).\n";
    (*_err) << "    Should be appended to --brackets=attach or --brackets=linux.\n";
    (*_err) << endl;
    (*_err) << "    -o   OR  --one-line=keep-statements\n";
    (*_err) << "    Don't break lines containing multiple statements into\n";
    (*_err) << "    multiple single-statement lines.\n";
    (*_err) << endl;
    (*_err) << "    -O   OR  --one-line=keep-blocks\n";
    (*_err) << "    Don't break blocks residing completely on one line\n";
    (*_err) << endl;
    (*_err) << "    -p   OR  --pad=oper\n";
    (*_err) << "    Insert space paddings around operators only.\n";
    (*_err) << endl;
    (*_err) << "    --pad=paren\n";
    (*_err) << "    Insert space paddings around parenthesies only.\n";
    (*_err) << endl;
    (*_err) << "    -P   OR  --pad=all\n";
    (*_err) << "    Insert space paddings around operators AND parenthesies.\n";
    (*_err) << endl;
    (*_err) << "    --convert-tabs\n";
    (*_err) << "    Convert tabs to spaces.\n";
    (*_err) << endl;
    (*_err) << "    --break-blocks\n";
    (*_err) << "    Insert empty lines around unrelated blocks, labels, classes, ...\n";
    (*_err) << endl;
    (*_err) << "    --break-blocks=all\n";
    (*_err) << "    Like --break-blocks, except also insert empty lines \n";
    (*_err) << "    around closing headers (e.g. 'else', 'catch', ...).\n";
    (*_err) << endl;
    (*_err) << "    --break-elseifs\n";
    (*_err) << "    Break 'else if()' statements into two different lines.\n";
    (*_err) << endl;
    (*_err) << "Other options:\n";
    (*_err) << "-------------\n";
    (*_err) << "    --suffix=####\n";
    (*_err) << "    Append the suffix #### instead of '.orig' to original filename.\n";
    (*_err) << endl;
    (*_err) << "    -X   OR  --errors-to-standard-output\n";
    (*_err) << "    Print errors and help information to standard-output rather than\n";
    (*_err) << "    to standard-error.\n";
    (*_err) << endl;
    (*_err) << "    -v   OR   --version\n";
    (*_err) << "    Print version number\n";
    (*_err) << endl;
    (*_err) << "    -h   OR   -?   OR   --help\n";
    (*_err) << "    Print this help message\n";
    (*_err) << endl;
    (*_err) << "Default options file:\n";
    (*_err) << "---------------------\n";
    (*_err) << "    Artistic Style looks for a default options file in the\n";
    (*_err) << "    following order:\n";
    (*_err) << "    1. The contents of the ARTISTIC_STYLE_OPTIONS environment\n";
    (*_err) << "       variable if it exists.\n";
    (*_err) << "    2. The file called .astylerc in the directory pointed to by the\n";
    (*_err) << "       HOME environment variable ( i.e. $HOME/.astylerc ).\n";
    (*_err) << "    3. The file called .astylerc in the directory pointed to by the\n";
    (*_err) << "       HOMEPATH environment variable ( i.e. %HOMEPATH%\\.astylerc ).\n";
    (*_err) << "    If a default options file is found, the options in this file\n";
    (*_err) << "    will be parsed BEFORE the command-line options.\n";
    (*_err) << "    Options within the default option file may be written without\n";
    (*_err) << "    the preliminary '-' or '--'.\n";
    (*_err) << endl;
}

int main(int argc, char *argv[])
{
    ASFormatter formatter;
    vector<string> fileNameVector;
    vector<string> optionsVector;
    string optionsFileName = "";
    string arg;
    bool ok = true;
    bool shouldPrintHelp = false;
    bool shouldParseOptionsFile = true;

    _err = &cerr;
    _suffix = ".orig";
    _modeManuallySet = false;

    // manage flags
    for (int i=1; i<argc; i++)
    {
        arg = string(argv[i]);

        if ( IS_PARAM_OPTION(arg ,"--options=none") )
        {
            shouldParseOptionsFile = false;
        }
        else if ( IS_PARAM_OPTION(arg ,"--options=") )
        {
            optionsFileName = GET_PARAM(arg, "--options=");
        }
        else if ( IS_OPTION(arg, "-h")
                  || IS_OPTION(arg, "--help")
                  || IS_OPTION(arg, "-?") )
        {
            shouldPrintHelp = true;
        }
        else if (arg[0] == '-')
        {
            optionsVector.push_back(arg);
        }
        else // file-name
        {
            fileNameVector.push_back(arg);
        }
    }

    // parse options file
    if (shouldParseOptionsFile)
    {
        if (optionsFileName.compare("") == 0)
        {
            char* env = getenv("ARTISTIC_STYLE_OPTIONS");
            if (env != NULL)
                optionsFileName = string(env);
        }
        if (optionsFileName.compare("") == 0)
        {
            char* env = getenv("HOME");
            if (env != NULL)
                optionsFileName = string(env) + string("/.astylerc");
        }
        if (optionsFileName.compare("") == 0)
        {
            char* env = getenv("HOMEPATH");
            if (env != NULL)
                optionsFileName = string(env) + string("/.astylerc");
        }

        if (optionsFileName.compare("") != 0)
        {
            ifstream optionsIn(optionsFileName.c_str());
            if (optionsIn)
            {
                vector<string> fileOptionsVector;
                importOptions(optionsIn, fileOptionsVector);
                ok = parseOptions(formatter,
                                  fileOptionsVector.begin(),
                                  fileOptionsVector.end(),
                                  string("Unknown option in default options file: "));
            }

            optionsIn.close();
            if (!ok)
            {
                (*_err) << "For help on options, type 'astyle -h' " << endl;
            }
        }
    }

    // parse options from command line

    ok = parseOptions(formatter,
                      optionsVector.begin(),
                      optionsVector.end(),
                      string("Unknown command line option: "));
    if (!ok)
    {
        (*_err) << "For help on options, type 'astyle -h' " << endl;
        exit(1);
    }

    if (shouldPrintHelp)
    {
        printHelp();
		exit(1);
    }

    // if no files have been given, use cin for input and cout for output
    if (fileNameVector.empty())
    {
        formatter.init( new ASStreamIterator(&cin) );

        while (formatter.hasMoreLines() )
        {
            cout << formatter.nextLine();
            if (formatter.hasMoreLines())
                cout << endl;
        }
        cout.flush();
    }
    else
    {
        // indent the given files
        for (int i=0; i<fileNameVector.size(); i++)
        {
            string originalFileName = fileNameVector[i];
            string inFileName = originalFileName + _suffix;

            remove(inFileName.c_str());

            if ( rename(originalFileName.c_str(), inFileName.c_str()) < 0)
                error("Could not rename ", string(originalFileName + " to " + inFileName).c_str());

            ifstream in(inFileName.c_str());
            if (!in)
                error("Could not open input file", inFileName.c_str());

            ofstream out(originalFileName.c_str());
            if (!out)
                error("Could not open output file", originalFileName.c_str());

            // Unless a specific language mode has been, set the language mode
            // according to the file's suffix.
            if (!_modeManuallySet)
            {
                if (stringEndsWith(originalFileName, string(".java")))
                {
                    formatter.setJavaStyle();
                }
                else
                {
                    formatter.setCStyle();
                }
            }

            formatter.init( new ASStreamIterator(&in) );
            while (formatter.hasMoreLines() )
            {
                out << formatter.nextLine();
                if (formatter.hasMoreLines())
                    out << endl;
            }

            out.flush();
            out.close();

            in.close();
        }
    }
    return 0;
}