qerr.h

算断裂的

// ------------------------------------------------------------------
// qerr.h
//
// This file contains the definition of the class QMG:Error, which is
// used for throwing exceptions.  Also QMG::Error_Message and QMG::Error_Task
// Matlab version
// ------------------------------------------------------------------
// Author: Stephen A. Vavasis
// Copyright (c) 1999 by Cornell University.  All rights reserved.
// 
// See the accompanying file 'Copyright' for authorship information,
// the terms of the license governing this software, and disclaimers
// concerning this software.
// ------------------------------------------------------------------
// This file is part of the QMG software.  
// Version 2.0 of QMG, release date September 3, 1999.
// ------------------------------------------------------------------


#ifndef QERR_H
#define QERR_H

#include "qnamesp.h"




// ------------------------------------------------------------------
// Class QMG::Error_Message
// This class sets up an error message object.  The object holds
// a message that will get printed if throw_error is called.
// Usage:
//      Error_Message errmsg;
//      errmsg("hello");
// Then later, if  "throw_error" called, the error handler will print
// 'hello' (until errmsg is destroyed).
  
class QMG::Error_Message {
private:
  string s_;
  Error_Message* next_;
  static Error_Message* base_;
public:
  Error_Message();
  ~Error_Message();
  void set_string(const string& s1) { s_ = s1;}
  static void init_error_message_list();
  static void put_error_messages_into_stream(ostream& os);
};

// ------------------------------------------------------------------
// Class QMG::Error_Task
// This class is holds a task to be executed if there is an error.
// This class is an abstract base class.


class QMG::Error_Task {
private:
  Error_Task* next_;
  static Error_Task* base_;
  virtual void on_error_do(const string&) { };
public:
  Error_Task();
  virtual ~Error_Task();
  static void init_error_task_list();
  friend void QMG::throw_error(const string& s);
};


// ------------------------------------------------------------------
// Class QMG::Error
// This class is thrown by exceptions if exceptions enabled.

namespace QMG {
  const int ERROR_BUF_LEN = 2000;
}

class QMG::Error {
private:

  char concatenated_error_messages_[ERROR_BUF_LEN];
  // Only throw_error can create this
  explicit Error(const string& msg);
public:
  Error(const Error& e);
  ~Error();
  const char* get_error_messages() { return concatenated_error_messages_; };
  friend void QMG::throw_error(const string& s);
};




#endif