/******************************************************************************

 *

 * $Id: config_templ.l,v 1.8 2001/01/01 10:15:16 root Exp $

 *

 * Copyright (C) 1997-2007 by Dimitri van Heesch.

 *

 * Permission to use, copy, modify, and distribute this software and its

 * documentation under the terms of the GNU General Public License is hereby 

 * granted. No representations are made about the suitability of this software 

 * for any purpose. It is provided "as is" without express or implied warranty.

 * See the GNU General Public License for more details.

 *

 */

%{

/*

 *	includes

 */

#include "config.h"

#include "input.h"

#include <QtCore>

#define MAX_INCLUDE_DEPTH 10

/* -----------------------------------------------------------------

 *

 *	static variables

 */

struct ConfigFileState

{

  int lineNr;

  FILE *file;

  YY_BUFFER_STATE oldState;

  YY_BUFFER_STATE newState;

  QString fileName;

};  

static const QHash<QString,Input*>   *g_options;

static FILE                          *g_file;

static QString                        g_yyFileName;

static QString                        g_includeName;

static QVariant                       g_includePathList;

static QStack<ConfigFileState*>       g_includeStack;  

static int                            g_includeDepth;

static QVariant                      *g_arg;

static Input                         *g_curOption=0;

static QString                        g_elemStr;

static QTextCodec                    *g_codec     = QTextCodec::codecForName("UTF-8");

static QString                        g_codecName = QString::fromAscii("UTF-8");

static int                            g_lastState;

static QByteArray                     g_tmpString;

/* -----------------------------------------------------------------

 */

#undef	YY_INPUT

#define	YY_INPUT(buf,result,max_size) result=yyread(buf,max_size);

static int yyread(char *buf,int maxSize)

{

    // no file included

    if (g_includeStack.isEmpty()) 

    {

      return fread(buf,1,maxSize,g_file);

    } 

    else 

    {

      return fread(buf,1,maxSize,g_includeStack.top()->file);

    }

}

void config_err(const char *fmt, ...)

{

  va_list args;

  va_start(args, fmt);

  vfprintf(stderr, fmt, args);

  va_end(args); 

}

void config_warn(const char *fmt, ...)

{

  va_list args;

  va_start(args, fmt);

  vfprintf(stderr, fmt, args);

  va_end(args);

}

static void substEnvVarsInStrList(QStringList &sl);

static void substEnvVarsInString(QString &s);

static void checkEncoding()

{

  Input *option = g_options->value(QString::fromAscii("DOXYFILE_ENCODING"));

  if (option && option->value().toString()!=g_codecName)

  {

    QTextCodec *newCodec = QTextCodec::codecForName(option->value().toString().toAscii());

    if (newCodec)

    {

      g_codec = newCodec;

      g_codecName = option->value().toString();

    }

  }

}

static FILE *tryPath(const QString &path,const QString &fileName)

{

  QString absName=!path.isEmpty() ? path+QString::fromAscii("/")+fileName : fileName;

  QFileInfo fi(absName);

  if (fi.exists() && fi.isFile())

  {

    FILE *f = fopen(absName.toLocal8Bit(),"r");

    if (f==NULL)

      config_err("Error: could not open file %s for reading\n",absName.toLatin1().data());

    else 

      return f;

  }

  return NULL;

}

static FILE *findFile(const QString &fileName)

{

  if (QFileInfo(fileName).isAbsolute()) // absolute path

  {

    return tryPath(QString(), fileName);

  }

  // relative path, try with include paths in the list

  QStringList sl = g_includePathList.toStringList();

  substEnvVarsInStrList(sl);

  foreach (QString s, sl) 

  {

    FILE *f = tryPath(s,fileName);

    if (f) return f;

  }

  // try cwd if g_includePathList fails

  return tryPath(QString::fromAscii("."),fileName);

}

static void readIncludeFile(const QString &incName)

{

  if (g_includeDepth==MAX_INCLUDE_DEPTH) 

  {

    config_err("Error: maximum include depth (%d) reached, %s is not included. Aborting...\n",

	MAX_INCLUDE_DEPTH,qPrintable(incName));

    exit(1);

  } 

  QString inc = incName;

  substEnvVarsInString(inc);

  inc = inc.trimmed();

  uint incLen = inc.length();

  if (inc.at(0)==QChar::fromAscii('"') && 

      inc.at(incLen-1)==QChar::fromAscii('"')) // strip quotes

  {

    inc=inc.mid(1,incLen-2);

  }

  FILE *f = findFile(inc);

  if (f) // see if the include file can be found

  {

    // For debugging

#if SHOW_INCLUDES

    for (i=0;i<includeStack.count();i++) msg("  ");

    msg("@INCLUDE = %s: parsing...\n",inc.toLatin1().data());

#endif

    // store the state of the old file 

    ConfigFileState *fs=new ConfigFileState;

    fs->oldState=YY_CURRENT_BUFFER;

    fs->fileName=g_yyFileName;

    fs->file=f;

    // push the state on the stack

    g_includeStack.push(fs);

    // set the scanner to the include file

    yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));

    fs->newState=YY_CURRENT_BUFFER;

    g_yyFileName=inc;

    g_includeDepth++;

  } 

  else

  {

    config_err("Error: @INCLUDE = %s: not found!\n",inc.toLatin1().data());

    exit(1);

  }

}

%}

%option nounput

%option noyywrap

%option yylineno

%x      Start

%x	SkipComment

%x      SkipInvalid

%x      GetString

%x      GetStrList

%x      GetQuotedString

%x      GetEnvVar

%x      Include

%%

<*>\0x0d

<Start,GetString,GetStrList,SkipInvalid>"#"	 { BEGIN(SkipComment); }

<Start>[a-z_A-Z][a-z_A-Z0-9]*[ \t]*"="	 { QString cmd = g_codec->toUnicode(yytext);

                                           cmd=cmd.left(cmd.length()-1).trimmed(); 

					   g_curOption = g_options->value(cmd);

					   if (g_curOption==0) // oops not known

					   {

					     config_err("Warning: ignoring unsupported tag `%s' at line %d, file %s\n",

						 qPrintable(cmd),yylineno,qPrintable(g_yyFileName)); 

					     BEGIN(SkipInvalid);

					   }

					   else // known tag

					   {

					     //option->setEncoding(encoding);

					     g_arg = &g_curOption->value();

					     switch(g_curOption->kind())

					     {

					       case Input::StrList:

						 g_elemStr = QString();

						 *g_arg = QStringList();

					         BEGIN(GetStrList);

					         break;

					       case Input::String:

					         BEGIN(GetString);

					         break;

					       case Input::Int:

					         BEGIN(GetString);

					         break;

					       case Input::Bool:

					         BEGIN(GetString);

						 break;

					       case Input::Obsolete:

					         config_err("Warning: Tag `%s' at line %d of file %s has become obsolete.\n"

						            "To avoid this warning please update your configuration "

							    "file using \"doxygen -u\"\n", qPrintable(cmd),

							    yylineno,qPrintable(g_yyFileName)); 

					         BEGIN(SkipInvalid);

						 break;

					     }

					   }

					}

<Start>[a-z_A-Z][a-z_A-Z0-9]*[ \t]*"+="	{ QString cmd=g_codec->toUnicode(yytext);

                                          cmd=cmd.left(cmd.length()-2).trimmed(); 

					  g_curOption = g_options->value(cmd);

					  if (g_curOption==0) // oops not known

					  {

					    config_err("Warning: ignoring unsupported tag `%s' at line %d, file %s\n",

						yytext,yylineno,qPrintable(g_yyFileName)); 

					    BEGIN(SkipInvalid);

					  }

					  else // known tag

					  {

					    switch(g_curOption->kind())

					    {

					      case Input::StrList:

						g_arg = &g_curOption->value();

						g_elemStr=QString();

					        BEGIN(GetStrList);

					        break;

					      case Input::String:

					      case Input::Int:

					      case Input::Bool:

					        config_err("Warning: operator += not supported for `%s'. Ignoring line at line %d, file %s\n",

						    yytext,yylineno,qPrintable(g_yyFileName)); 

					        BEGIN(SkipInvalid);

						break;

					      case Input::Obsolete:

					         config_err("Warning: Tag `%s' at line %d of file %s has become obsolete.\n"

						            "To avoid this warning please update your configuration "

							    "file using \"doxygen -u\"\n", 

							    qPrintable(cmd),yylineno,qPrintable(g_yyFileName)); 

					         BEGIN(SkipInvalid);

						 break;

					     }

					   }

					}

<Start>"@INCLUDE_PATH"[ \t]*"=" 	{ BEGIN(GetStrList); g_arg=&g_includePathList; *g_arg = QStringList(); g_elemStr=QString(); }

  /* include a config file */

<Start>"@INCLUDE"[ \t]*"="     		{ BEGIN(Include);}

<Include>([^ \"\t\r\n]+)|("\""[^\n\"]+"\"") { 

  					  readIncludeFile(g_codec->toUnicode(yytext)); 

  					  BEGIN(Start);

					}

<<EOF>>					{

                                          //printf("End of include file\n");

					  //printf("Include stack depth=%d\n",g_includeStack.count());

                                          if (g_includeStack.isEmpty())

					  {

					    //printf("Terminating scanner!\n");

					    yyterminate();

					  }

					  else

					  {

					    ConfigFileState *fs = g_includeStack.pop();

					    fclose(fs->file);

					    YY_BUFFER_STATE oldBuf = YY_CURRENT_BUFFER;

					    yy_switch_to_buffer( fs->oldState );

					    yy_delete_buffer( oldBuf );

					    g_yyFileName=fs->fileName;

					    delete fs; 

                                            g_includeDepth--;

					  }

  					}

<Start>[a-z_A-Z0-9]+			{ config_err("Warning: ignoring unknown tag `%s' at line %d, file %s\n",yytext,yylineno,qPrintable(g_yyFileName)); }

<GetString,SkipInvalid>\n	        { BEGIN(Start); }

<GetStrList>\n				{ 

					  if (!g_elemStr.isEmpty())

					  {

					    //printf("elemStr1=`%s'\n",elemStr.toLatin1().data());

					    *g_arg = QVariant(g_arg->toStringList() << g_elemStr);

					  }

					  BEGIN(Start); 

					}

<GetStrList>[ \t]+			{

  				          if (!g_elemStr.isEmpty())

					  {

					    //printf("elemStr2=`%s'\n",elemStr.toLatin1().data());

  					    *g_arg = QVariant(g_arg->toStringList() << g_elemStr);

					  }

					  g_elemStr = QString();

  					}

<GetString>[^ \"\t\r\n]+		{ 

                                          *g_arg = QVariant(g_codec->toUnicode(yytext)); 

                                          checkEncoding();

                                        }

<GetString,GetStrList,SkipInvalid>"\""	{ g_lastState=YY_START;

  					  BEGIN(GetQuotedString); 

                                          g_tmpString="";

					}

<GetQuotedString>"\""|"\n" 		{ 

                                          // we add a bogus space to signal that the string was quoted. This space will be stripped later on.

                                          g_tmpString+=" ";

  					  //printf("Quoted String = `%s'\n",tmpString.toLatin1().data());

  					  if (g_lastState==GetString)

					  {

					    *g_arg = g_codec->toUnicode(g_tmpString);

                                            checkEncoding();

					  }

					  else

					  {

					    g_elemStr+=g_codec->toUnicode(g_tmpString);

					  }

					  if (*yytext=='\n')

					  {

					    config_err("Warning: Missing end quote (\") on line %d, file %s\n",yylineno,

                                                qPrintable(g_yyFileName));

					  }

					  BEGIN(g_lastState);

  					}

<GetQuotedString>"\\\""			{

  					  g_tmpString+='"';

  					}

<GetQuotedString>.			{ g_tmpString+=*yytext; }

<GetStrList>[^ \#\"\t\r\n]+		{

  					  g_elemStr+=g_codec->toUnicode(yytext);

  					}

<SkipComment>\n				{ BEGIN(Start); }

<SkipComment>\\[ \r\t]*\n		{ BEGIN(Start); }

<*>\\[ \r\t]*\n				{ }

<*>\n

<*>.					

%%

/*@ ----------------------------------------------------------------------------

 */

static void substEnvVarsInString(QString &s)

{

  static QRegExp re(QString::fromAscii("\\$\\([a-z_A-Z0-9]+\\)"));

  if (s.isEmpty()) return;

  int p=0;

  int i,l;

  //printf("substEnvVarInString(%s) start\n",s.toLatin1().data());

  while ((i=re.indexIn(s,p))!=-1)

  {

    l = re.matchedLength();

    //printf("Found environment var s.mid(%d,%d)=`%s'\n",i+2,l-3,s.mid(i+2,l-3).toLatin1().data());

    QString env=g_codec->toUnicode(getenv(s.mid(i+2,l-3).toLatin1()));

    substEnvVarsInString(env); // recursively expand variables if needed.

    s = s.left(i)+env+s.right(s.length()-i-l);

    p=i+env.length(); // next time start at the end of the expanded string

  }

  s=s.trimmed(); // to strip the bogus space that was added when an argument

                         // has quotes

  //printf("substEnvVarInString(%s) end\n",s.toLatin1().data());

}

static void substEnvVarsInStrList(QStringList &sl)

{

  QStringList out;

  foreach (QString result, sl)

  {

    // an argument with quotes will have an extra space at the end, so wasQuoted will be TRUE.

    bool wasQuoted = (result.indexOf(QChar::fromAscii(' '))!=-1) || 

                     (result.indexOf(QChar::fromAscii('\t'))!=-1);

    // here we strip the quote again

    substEnvVarsInString(result);

    //printf("Result %s was quoted=%d\n",result.toLatin1().data(),wasQuoted);

    if (!wasQuoted) /* as a result of the expansion, a single string

		       may have expanded into a list, which we'll

		       add to sl. If the orginal string already 

		       contained multiple elements no further 

		       splitting is done to allow quoted items with spaces! */

    {

      int l=result.length();

      int i,p=0;

      // skip spaces

      // search for a "word"

      for (i=0;i<l;i++)

      {

	QChar c=0;

	// skip until start of new word

	while (i<l && ((c=result.at(i))==QChar::fromAscii(' ') || c==QChar::fromAscii('\t'))) i++; 

	p=i; // p marks the start index of the word

	// skip until end of a word

	while (i<l && ((c=result.at(i))!=QChar::fromAscii(' ') && 

	              c!=QChar::fromAscii('\t') && 

		      c!=QChar::fromAscii('"'))) i++;

	if (i<l) // not at the end of the string

	{

	  if (c==QChar::fromAscii('"')) // word within quotes

	  {

	    p=i+1;

	    for (i++;i<l;i++)

	    {

	      c=result.at(i);

	      if (c==QChar::fromAscii('"')) // end quote

	      {

                out += result.mid(p,i-p);

		p=i+1;

		break; 

	      }

	      else if (c==QChar::fromAscii('\\')) // skip escaped stuff

	      {

		i++;

	      }

	    }

	  }

	  else if (c==QChar::fromAscii(' ') || c==QChar::fromAscii('\t')) // separator

	  {

            out += result.mid(p,i-p);

	    p=i+1;

	  }

	}

      }

      if (p!=l) // add the leftover as a string

      {

        out += result.right(l-p);

      }

    }

    else // just goto the next element in the list

    {

      out += result;

    }

  }

  sl = out;

}

//--------------------------------------------------------------------------

bool parseConfig(

      const QString &fileName,

      const QHash<QString,Input *> &options

    )

{

  QHashIterator<QString, Input*> i(options);

  g_file = fopen(fileName.toLocal8Bit(),"r");

  if (g_file==NULL) return false;

  // reset all values

  i.toFront();

  while (i.hasNext()) 

  {

    i.next();

    if (i.value())

    {

      i.value()->reset();

    }

  }

  // parse config file

  g_options       = &options;

  g_yyFileName    = fileName;

  g_includeStack.clear();

  g_includeDepth  = 0;

  configrestart( configin );

  BEGIN( Start );

  configlex();

  // update the values in the UI

  i.toFront();

  while (i.hasNext()) 

  {

    i.next();

    if (i.value())

    {

      //printf("Updating: %s\n",qPrintable(i.key()));

      i.value()->update();

    }

    else

    {

      printf("Invalid option: %s\n",qPrintable(i.key()));

    }

  } 

  fclose(g_file);

  return true;

}

void writeStringValue(QTextStream &t,QTextCodec *codec,const QString &s)

{

  QChar c;

  bool needsEscaping=FALSE;

  // convert the string back to it original encoding

  //QByteArray se = codec->fromUnicode(s);

  t.setCodec(codec);

  const QChar *p=s.data();

  if (!s.isEmpty() && !p->isNull())

  {

    while (!(c=*p++).isNull() && !needsEscaping)