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Exception.hpp

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/*==========================================================================
 * Copyright (c) 2001 Carnegie Mellon University.  All Rights Reserved.
 *
 * Use of the Lemur Toolkit for Language Modeling and Information Retrieval
 * is subject to the terms of the software license set forth in the LICENSE
 * file included with this software, and also available at
 * http://www.cs.cmu.edu/~lemur/license.html
 *
 *==========================================================================
*/


#ifndef _EXCEPTION_HPP
#define _EXCEPTION_HPP


#include "common_headers.hpp"

typedef unsigned long LemurErrorType;

class Exception {
public:
  Exception(char *throwerString=" unknown thrower", char *whatString="unknown exception") {
    _what = throwerString;
    _what += ": ";
    _what += whatString;
  }

  Exception( const std::string& whoString, const std::string& whereLine, 
             const std::string& whatString, LemurErrorType code ) :
    _what( whoString + "(" + whereLine + ")" + ": " + whatString ),
    _code( code )
  {
  }

  Exception( const std::string& whoString, const std::string& whereLine,
             const std::string& whatString, const Exception& inner ) :
    _what( whoString + "(" + whereLine + ")" + ": " + whatString + "\n\t" + inner.what() ),
    _code(inner._code)
  {
  }

  ~Exception() {}

  inline void writeMessage(ostream &os = cerr)
  {
    os << "Exception [" << _what << "], code = " << _code << endl;
  }

  const std::string& what() const {
    return _what;
  }

  LemurErrorType code() const {
    return _code;
  }

private:
  std::string _what;
  LemurErrorType _code;
};

#define LEMUR_MAKESTR(x) # x

#define LEMUR_ABORT( e )                  { std::cerr << e.what() << std::endl; exit(-1); }
#define LEMUR_THROW_LINE( code, text, file, line )  throw Exception( file, LEMUR_MAKESTR(line), \
                                                    std::string() + text, (code) )
#define LEMUR_THROW(code, text)  LEMUR_THROW_LINE(code, text, __FILE__, __LINE__)
#define LEMUR_RETHROW_LINE( e, text, file, line )   throw Exception( file, LEMUR_MAKESTR(line), \
                                                   (text), (e) )
#define LEMUR_RETHROW( e, text)  LEMUR_RETHROW_LINE(e, text, __FILE__, __LINE__)

#define LEMUR_GENERIC_ERROR               ((LemurErrorType)0xFFFFFFFF)
#define LEMUR_MISSING_PARAMETER_ERROR     ((LemurErrorType)0xFFFFFFFE)
#define LEMUR_PARSE_ERROR                 ((LemurErrorType)0xFFFFFFFD)
#define LEMUR_KEYFILE_IO_ERROR            ((LemurErrorType)0xFFFFFFFC)
#define LEMUR_IO_ERROR                    ((LemurErrorType)0xFFFFFFFB)
#define LEMUR_RUNTIME_ERROR               ((LemurErrorType)0xFFFFFFFA)
#define LEMUR_NETWORK_ERROR               ((LemurErrorType)0xFFFFFFF9)

#endif

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