1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/work/klao/error.h	Fri Jan 07 00:43:54 2005 +0000
     1.3 @@ -0,0 +1,188 @@
     1.4 +/* -*- C++ -*-
     1.5 + * src/lemon/error.h - Part of LEMON, a generic C++ optimization library
     1.6 + *
     1.7 + * Copyright (C) 2004 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     1.8 + * (Egervary Combinatorial Optimization Research Group, EGRES).
     1.9 + *
    1.10 + * Permission to use, modify and distribute this software is granted
    1.11 + * provided that this copyright notice appears in all copies. For
    1.12 + * precise terms see the accompanying LICENSE file.
    1.13 + *
    1.14 + * This software is provided "AS IS" with no warranty of any kind,
    1.15 + * express or implied, and with no claim as to its suitability for any
    1.16 + * purpose.
    1.17 + *
    1.18 + */
    1.19 +
    1.20 +#ifndef LEMON_ERROR_H
    1.21 +#define LEMON_ERROR_H
    1.22 +
    1.23 +//! \ingroup misc
    1.24 +//! \file
    1.25 +//! \brief Basic error handling (signaling) routines.
    1.26 +
    1.27 +#include <exception>
    1.28 +#include <string>
    1.29 +#include <sstream>
    1.30 +
    1.31 +#include <boost/shared_ptr.hpp>
    1.32 +
    1.33 +namespace lemon {
    1.34 +
    1.35 +  /// Exception-safe convenient "error message" class.
    1.36 +  class ErrorMessage {
    1.37 +  protected:
    1.38 +    boost::shared_ptr<std::ostringstream> buf;
    1.39 +    
    1.40 +    bool init() throw() {
    1.41 +      try {
    1.42 +	buf.reset(new std::ostringstream);
    1.43 +      }
    1.44 +      catch(...) {
    1.45 +	buf.reset();
    1.46 +      }
    1.47 +      return buf;
    1.48 +    }
    1.49 +
    1.50 +  public:
    1.51 +
    1.52 +    ErrorMessage() throw() { init(); }
    1.53 +
    1.54 +    ErrorMessage(const char *message) throw() {
    1.55 +      init();
    1.56 +      *this << message;
    1.57 +    }
    1.58 +
    1.59 +    ErrorMessage(const std::string &message) throw() {
    1.60 +      init();
    1.61 +      *this << message;
    1.62 +    }
    1.63 +
    1.64 +    template <typename T>
    1.65 +    ErrorMessage& operator<<(const T &t) throw() {
    1.66 +      if( !buf ) return *this;
    1.67 +
    1.68 +      try {
    1.69 +	*buf << t;
    1.70 +      }
    1.71 +      catch(...) {
    1.72 +	buf.reset();
    1.73 +      }
    1.74 +    }
    1.75 +
    1.76 +    const char* message() throw() {
    1.77 +      if( !buf ) return 0;
    1.78 +
    1.79 +      const char* mes = 0;
    1.80 +      try {
    1.81 +	mes = buf->str().c_str();
    1.82 +      }
    1.83 +      catch(...) {}
    1.84 +      return mes;
    1.85 +    }
    1.86 +    
    1.87 +  };
    1.88 +
    1.89 +  /**
    1.90 +   * \brief Generic exception class.
    1.91 +   *
    1.92 +   * Base class for exceptions used in LEMON.
    1.93 +   */
    1.94 +  class Exception : public std::exception, public ErrorMessage {
    1.95 +  public:
    1.96 +    Exception() throw() {}
    1.97 +    explicit Exception(const std::string &s) throw()
    1.98 +      : ErrorMessage(s) {}
    1.99 +    virtual ~Exception() throw() {}
   1.100 +    
   1.101 +    virtual const char* what() const throw() {
   1.102 +      const char *mes = message();
   1.103 +      if( mes ) return mes;
   1.104 +      return "lemon::Exception";
   1.105 +    }
   1.106 +  };
   1.107 +
   1.108 +
   1.109 +  class LogicError : public Exception {
   1.110 +    explicit LogicError(const std::string &s)
   1.111 +      : Exception(s) {}
   1.112 +  };
   1.113 +
   1.114 +  class RuntimeError : public Exception {
   1.115 +    explicit RuntimeError(const std::string &s)
   1.116 +      : Exception(s) {}
   1.117 +  };
   1.118 +
   1.119 +  class RangeError : public RuntimeError {
   1.120 +    explicit RangeError(const std::string &s)
   1.121 +      : RuntimeError(s) {}
   1.122 +  };
   1.123 +
   1.124 +  class IOError : public RuntimeError {
   1.125 +    explicit IOError(const std::string &s)
   1.126 +      : RuntimeError(s) {}
   1.127 +  };
   1.128 +
   1.129 +  class DataFormatError : public IOError {
   1.130 +    explicit DataFormatError(const std::string &message)
   1.131 +      : IOError(message) : line(0) {}
   1.132 +    DataFormatError(const std::string &file_name, int line_num,
   1.133 +		    sconst std::string &message)
   1.134 +      : IOError(message), line(line_num) { set_file(file_name); }
   1.135 +
   1.136 +    void set_line(int line_num) { line=line_num; }
   1.137 +    void set_file(const std::string &file_name) {
   1.138 +      try {
   1.139 +	file.reset(new std::string);
   1.140 +	*file = file_name;
   1.141 +      }
   1.142 +      catch(...) {
   1.143 +	file.reset();
   1.144 +      }
   1.145 +    }
   1.146 +
   1.147 +    virtual const char* what() const {
   1.148 +      const char *mes = 0;
   1.149 +      try {
   1.150 +	std::ostringstream ostr;
   1.151 +	ostr << IOError::what();
   1.152 +	if( file || line ) {
   1.153 +	  ostr << " (";
   1.154 +	  if( file ) ostr << "in file" << *file;
   1.155 +	  if( line ) ostr << " at line" << line;
   1.156 +	}
   1.157 +	mes = ostr.str().c_str();
   1.158 +      }
   1.159 +      catch(...) {}
   1.160 +      if( mes ) return mes;
   1.161 +      return "lemon::DataFormatError";
   1.162 +    }
   1.163 +  };
   1.164 +
   1.165 +
   1.166 +
   1.167 +  /****************  Macros  ****************/
   1.168 +
   1.169 +
   1.170 +  /**
   1.171 +   * \brief Macro for assertions with customizable message
   1.172 +   */
   1.173 +
   1.174 +# define lemon_assert(exp, msg) \
   1.175 +    if(!(exp)) { \
   1.176 +      std::cerr << __FILE__ ":" << __LINE__ << ": " << (msg) << std::endl; \
   1.177 +      abort; \
   1.178 +    }
   1.179 +
   1.180 +
   1.181 +  /**
   1.182 +   * \brief Macro for mark not yet implemented features.
   1.183 +   *
   1.184 +   * \todo Is this the right place for this? It should be used only in
   1.185 +   * modules under development.
   1.186 +   */
   1.187 +
   1.188 +# define FIXME(msg) lemon_assert(0, "FIXME: " msg)
   1.189 +
   1.190 +}
   1.191 +#endif // LEMON_ERROR_H