/afs/in2p3.fr/throng/virgo/virgoDev/SoftFlorent/GWOLLUM/v2r2/src/Utils/IO.h

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//  Author : florent robinet (LAL - Orsay): robinet@lal.in2p3.fr
#ifndef __IO__
#define __IO__

#include "CUtils.h"

using namespace std;

class IO {

 private:
  
  vector< pair<string,string> > fAllLines;

  // parse one file
  bool ParseFile(const char* filename);
  
  // counter
  int fCurline;
  
  // current key 
  string fCurkey;
  
  // current tag 
  string fCurtag;
  
  // maximum number of characters in a line
  static const unsigned sLinesize;

 public:
  
  // builds IO from files matching filepattern 
  IO(const char* filepattern);

  virtual ~IO(void) {fAllLines.clear();}
 
  void Dump(ostream& out = cout) const;
  
  inline bool IsZombie(void) const {return !fAllLines.size();}

  friend ostream& operator<<(ostream& out, IO& io);
  
  template <class T>
    bool GetOpt(const char* tag, const char* key, vector< T >& values) const; 
  
  template <class T>
    bool GetOpt(const char* tag, const char* key, T& value) const; 
  
  bool GetOpt(const char* tag, const char* key, string& value) const;
  
  string GetLineData(const char* tag, const char* key) const;
  
  template <class T>  
    bool GetAllOpt(const char* tag, const char* key, vector< T >& values);       
  template <class T>
    bool GetAllOpt(const char* tag, const char* key, T& value); 


  string GetNextLineData(const char* tag, const char* key);

};

template <class T>
bool IO::GetOpt(const char* tag, const char* key, vector< T >& values) const {
  string data = GetLineData(tag,key);
 
  istringstream in(data.c_str());  
  while(1) {
    T tmp;
    in>>tmp;
    if(!in) break;
    values.push_back(tmp);
  } 
  
  return (bool)values.size();
}

template <class T>
bool IO::GetOpt(const char* tag, const char* key, T& value) const {
  string data = GetLineData(tag,key);
  
  istringstream in(data.c_str());  
  in>>value;
  return (!!in)*data.size();
}

template <class T>
bool IO::GetAllOpt(const char* tag, const char* key, vector< T >& values) {
 
  string data;
  T tmp;
  while(1) {//  loop over lines
    data=GetNextLineData(tag, key);
    if(!data.compare("")) break;
    istringstream inval(data.c_str());  
    while(1) {// loop over values
      inval>>tmp;
      if(!inval) break;
      values.push_back(tmp);
    }
    inval.clear();
  } 

  return (bool)values.size();
}

template <class T>
bool IO::GetAllOpt(const char* tag, const char* key, T& value) {
  string data = GetNextLineData(tag, key);
  if(data.empty()) return false;
  
  istringstream in(data.c_str());  
  in>>value;
  if(in) {
    return true;
  }
  else {
    return false;  
  }
}

#endif

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