IO Class Reference

General option file parser. More...

#include <IO.h>

Public Member Functions
void	Dump (std::ostream &out=std::cout) const
	dumps fAllLines More...
template<class T >
bool	GetAllOpt (const char *tag, const char *key, std::vector< T > &values)
	reads a vector of T More...
template<class T >
bool	GetAllOpt (const char *tag, const char *key, T &value)
	reads a T More...
std::string	GetLineData (const char *tag, const char *key) const
std::string	GetNextLineData (const char *tag, const char *key)
template<class T >
bool	GetOpt (const char *tag, const char *key, std::vector< T > &values) const
	reads a vector of T More...
template<class T >
bool	GetOpt (const char *tag, const char *key, T &value) const
	reads a T More...
bool	GetOpt (const char *tag, const char *key, std::string &value) const
	reads a string More...
	IO (const char *filepattern)
	builds IO from files matching filepattern More...
bool	IsZombie () const
	true if constructor went wrong More...
	~IO ()

Static Public Attributes
static const unsigned	sLinesize = 1000
	maximum line size More...

Private Member Functions
bool	ParseFile (const char *filename)
	parse one file More...

Private Attributes
std::vector< std::pair < std::string, std::string > >	fAllLines
	all non empty, uncommented lines More...
std::string	fCurkey
	current key More...
int	fCurline
	counter More...
std::string	fCurtag
	current tag More...

Friends
std::ostream &	operator<< (std::ostream &out, IO &io)
	dumps fAllLines More...

Detailed Description

General option file parser.

*   IO io("myfile.opt");
*   fECALthresh = 0.05;
*   io.GetOpt("ECAL", "threshold", fECALthresh);
*  

Author

Colin Bernet

Date

January 2002

Definition at line 28 of file IO.h.

Constructor & Destructor Documentation

IO::IO

(

const char *

filepattern

)

builds IO from files matching filepattern

Definition at line 9 of file IO.cc.

References gather_cfg::cout, electronDataDiscovery::files, Utils::Glob(), i, and ParseFile().

                              :  fCurline(0) {
  // loop on all files matching pattern, store each non empty line in 
  // fAllLines for efficient searches later.
  cout<<endl;
  cout<<"------ Reading User Parameters : "<<filepattern<<endl;

  vector<string> files = Utils::Glob(filepattern);
  
  if( files.empty() ) {
    string err = "IO::IO : no files verify pattern ";
    err += filepattern;
    throw err;
  }

  for(unsigned i=0; i<files.size(); i++) {
    ParseFile(files[i].c_str());
  }
  cout<<"------ Reading User Parameters : DONE ---------"<<endl;
  cout<<endl;

}

IO::~IO ( )

inline

Definition at line 52 of file IO.h.

References fAllLines.

{fAllLines.clear();}

Member Function Documentation

void IO::Dump

(

std::ostream &

out = std::cout

)

const

dumps fAllLines

Definition at line 76 of file IO.cc.

References fAllLines, and i.

Referenced by operator<<().

                                {
  for (unsigned i=0; i<fAllLines.size(); i++) {
    out<<fAllLines[i].first<< "\t" << fAllLines[i].second << endl; 
  } 
}

template<class T >

bool IO::GetAllOpt	(	const char *	tag,
		const char *	key,
		std::vector< T > &	values
	)

reads a vector of T

this function allows to read several lines with the same tag/key:

*  while ( GetAllOpt(tag, key, values) ) 
*  //    do something...
*  

Definition at line 131 of file IO.h.

                                                                           {
  return false;
} 

template<class T >

bool IO::GetAllOpt	(	const char *	tag,
		const char *	key,
		T &	value
	)

reads a T

this function allows to read several lines with the same tag/key:

*  while ( GetAllOpt(tag, key, value) ) 
*  //    do something...
*  

Definition at line 136 of file IO.h.

References data, GetNextLineData(), recoMuon::in, AlCaHLTBitMon_QueryRunRegistry::string, and relativeConstraints::value.

                                                             {
  std::string data = GetNextLineData(tag, key);
  if(data.empty()) return false;
  
  std::istringstream in(data.c_str());  
  in>>value;
  if(in) {
    return true;
  }
  else {
    return false;  
  }
}

string IO::GetLineData	(	const char *	tag,
		const char *	key
	)		const

Definition at line 89 of file IO.cc.

References data, fAllLines, first, newFWLiteAna::found, i, recoMuon::in, edm::second(), sLinesize, AlCaHLTBitMon_QueryRunRegistry::string, and GlobalPosition_Frontier_DevDB_cff::tag.

Referenced by GetOpt().

                                                             {
  // if tag matches several option lines, data is the data corresponding
  // to the last tag

  char data[sLinesize];
  bool found = false;
  for(unsigned i=0; i<fAllLines.size(); i++) {
    if( !fnmatch(fAllLines[i].first.c_str(), tag, 0) ) { 
      istringstream in(fAllLines[i].second.c_str());
      string readkey; in>>readkey;
      
      if(readkey == key) {
        //      data.erase();
        //      string skey = key;
        //      int start = pos+skey.size();
        //      data.assign(fAllLines[i].second, start, data.size()-start);
        found=true;
        in.get(data,sLinesize);
      }
    }
  }
  if(found) return string(data);
  else return string();
}

string IO::GetNextLineData	(	const char *	tag,
		const char *	key
	)

Definition at line 114 of file IO.cc.

References data, fAllLines, fCurkey, fCurline, fCurtag, first, newFWLiteAna::found, i, recoMuon::in, combine::key, edm::second(), sLinesize, AlCaHLTBitMon_QueryRunRegistry::string, and GlobalPosition_Frontier_DevDB_cff::tag.

Referenced by GetAllOpt().

                                                            {

  if(fCurtag != tag || fCurkey != key) {
    // not the same request
    fCurline = 0;
    fCurtag = tag;
    fCurkey = key;
  }
  // cout<<fCurline<<" "<<fCurtag<<" "<<fCurkey<<endl;

  char data[sLinesize];
  bool found = false;
  for(unsigned i=fCurline; i<fAllLines.size(); i++) {
    if( !fnmatch(fAllLines[i].first.c_str(), tag, 0) ) { 
      istringstream in(fAllLines[i].second.c_str());
      string readkey; in>>readkey;
      
      if(readkey == key) {
        found=true;
        in.get(data,sLinesize);
        fCurline=i+1;
        break;
      }
    }
  }
  if(found) return string(data);
  else return string();
}

template<class T >

bool IO::GetOpt	(	const char *	tag,
		const char *	key,
		std::vector< T > &	values
	)		const

reads a vector of T

Definition at line 106 of file IO.h.

References data, GetLineData(), recoMuon::in, AlCaHLTBitMon_QueryRunRegistry::string, and tmp.

Referenced by PFRootEventManager::connect(), DisplayManager::readOptions(), PFRootEventManager::readOptions(), and PFRootEventManagerColin::readSpecificOptions().

                                                                              {
  std::string data = GetLineData(tag,key);
 
  std::istringstream in(data.c_str());  
  while(1) {
    T tmp;
    in>>tmp;
    if(!in) break;
    values.push_back(tmp);
  } 

  return true;
}

template<class T >

bool IO::GetOpt	(	const char *	tag,
		const char *	key,
		T &	value
	)		const

reads a T

Definition at line 121 of file IO.h.

References data, GetLineData(), recoMuon::in, AlCaHLTBitMon_QueryRunRegistry::string, and relativeConstraints::value.

                                                                {
  std::string data = GetLineData(tag,key);
  
  std::istringstream in(data.c_str());  
  in>>value;
  if(in.good()) return true;
  else return false;
}

bool IO::GetOpt	(	const char *	tag,
		const char *	key,
		std::string &	value
	)		const

reads a string

bool IO::IsZombie ( ) const

inline

true if constructor went wrong

Definition at line 61 of file IO.h.

References fAllLines.

{return !fAllLines.size();}

bool IO::ParseFile ( const char *  filename )

private

parse one file

Definition at line 31 of file IO.cc.

References gather_cfg::cout, data, relativeConstraints::empty, fAllLines, recoMuon::in, alignCSCRings::s, sLinesize, and GlobalPosition_Frontier_DevDB_cff::tag.

Referenced by IO().

                                       {
  cout<<"file : "<<filename<<"\t\t";

  ifstream in(filename);
  if( !in.good() ) {
    cout<<"unreadable"<<endl;
    return false;
  }

  char data[sLinesize];
  char s[sLinesize];
  int pos=0;

  do { 
    in.seekg(pos);
    in.getline(s,sLinesize);
    
    pos = in.tellg();     
 
    if(string(s).empty()) {
      continue; // remove empty lines
    }

    istringstream lin(s);  

    string tag;
    lin>>tag;

    if(!strncmp(tag.c_str(),"//",2)) continue; // remove commented lines can be done better ...

    lin.get(data,sLinesize);
    
    fAllLines.push_back(pair<string, string>(tag, data));
  } while(in.good());
  
  if(in.eof()) {
    cout<<"ok"<<endl;
    return true;
  }
  else {
    cout<<"error"<<endl;
    return false;
  }
}

Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  out, IO &  io  )

friend

dumps fAllLines

Member Data Documentation

std::vector< std::pair< std::string, std::string> > IO::fAllLines

private

all non empty, uncommented lines

Definition at line 31 of file IO.h.

Referenced by Dump(), GetLineData(), GetNextLineData(), IsZombie(), ParseFile(), and ~IO().

std::string IO::fCurkey

private

current key

Definition at line 40 of file IO.h.

Referenced by GetNextLineData().

int IO::fCurline

private

counter

Definition at line 37 of file IO.h.

Referenced by GetNextLineData().

std::string IO::fCurtag

private

current tag

Definition at line 43 of file IO.h.

Referenced by GetNextLineData().

const unsigned IO::sLinesize = 1000

static

maximum line size

Definition at line 48 of file IO.h.

Referenced by GetLineData(), GetNextLineData(), and ParseFile().