lemon-0.x: src/lemon/error.h@425731cb66de

     1 /* -*- C++ -*-

     2  * src/lemon/error.h - Part of LEMON, a generic C++ optimization library

     3  *

     4  * Copyright (C) 2004 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

     5  * (Egervary Combinatorial Optimization Research Group, EGRES).

     6  *

     7  * Permission to use, modify and distribute this software is granted

     8  * provided that this copyright notice appears in all copies. For

     9  * precise terms see the accompanying LICENSE file.

    10  *

    11  * This software is provided "AS IS" with no warranty of any kind,

    12  * express or implied, and with no claim as to its suitability for any

    13  * purpose.

    14  *

    15  */

    17 #ifndef LEMON_ERROR_H

    18 #define LEMON_ERROR_H

    20 //! \ingroup misc

    21 //! \file

    22 //! \brief Basic exception classes and error handling.

    24 #include <exception>

    25 #include <string>

    26 #include <sstream>

    27 #include <iostream>

    28 #include <cstdlib>

    30 #include <boost/shared_ptr.hpp>

    32 namespace lemon {

    34   /// Exception-safe convenient "error message" class.

    36   /// Helper class which provides a convenient ostream-like (operator <<

    37   /// based) interface to create a string message. Mostly useful in

    38   /// exception classes (therefore the name).

    39   class ErrorMessage {

    40   protected:

    41     ///\e

    42     boost::shared_ptr<std::ostringstream> buf;

    44     ///\e

    45     bool init() throw() {

    46       try {

    47 	buf.reset(new std::ostringstream);

    48       }

    49       catch(...) {

    50 	buf.reset();

    51       }

    52       return buf;

    53     }

    55   public:

    57     ///\e

    58     ErrorMessage() throw() { init(); }

    60     ///\e

    61     ErrorMessage(const char *message) throw() {

    62       init();

    63       *this << message;

    64     }

    66     ///\e

    67     ErrorMessage(const std::string &message) throw() {

    68       init();

    69       *this << message;

    70     }

    72     ///\e

    73     template <typename T>

    74     ErrorMessage& operator<<(const T &t) throw() {

    75       if( !buf ) return *this;

    77       try {

    78 	*buf << t;

    79       }

    80       catch(...) {

    81 	buf.reset();

    82       }

    83     }

    85     ///\e

    86     const char* message() throw() {

    87       if( !buf ) return 0;

    89       const char* mes = 0;

    90       try {

    91 	mes = buf->str().c_str();

    92       }

    93       catch(...) {}

    94       return mes;

    95     }

    97   };

    99   /**

   100    * \brief Generic exception class.

   101    *

   102    * Base class for exceptions used in LEMON.

   103    */

   104   class Exception : public std::exception {

   105   public:

   106     ///\e

   107     Exception() {}

   108     ///\e

   109     virtual ~Exception() throw() {}

   111     ///\e

   112     virtual const char* exceptionName() const {

   113       return "lemon::Exception";

   114     }

   116     ///\e

   117     virtual const char* what() const throw() {

   118       return exceptionName();

   119     }

   120   };

   122   /**

   123    * \brief One of the two main subclasses of \ref Exception.

   124    *

   125    * Logic errors represent problems in the internal logic of a program;

   126    * in theory, these are preventable, and even detectable before the

   127    * program runs (e.g., violations of class invariants).

   128    *

   129    * A typical example for this is \ref UninitializedParameter.

   130    */

   131   class LogicError : public Exception {

   132   public:

   133     virtual const char* exceptionName() const {

   134       return "lemon::LogicError";

   135     }

   136   };

   138   /**

   139    * \brief \ref Exception for uninitialized parameters.

   140    *

   141    * This error represents problems in the initialization

   142    * of the parameters of the algorithms.

   143    */

   144   class UninitializedParameter : public LogicError {

   145   public:

   146     virtual const char* exceptionName() const {

   147       return "lemon::UninitializedParameter";

   148     }

   149   };

   152   /**

   153    * \brief One of the two main subclasses of \ref Exception.

   154    *

   155    * Runtime errors represent problems outside the scope of a program;

   156    * they cannot be easily predicted and can generally only be caught as

   157    * the program executes.

   158    */

   159   class RuntimeError : public Exception {

   160   public:

   161     virtual const char* exceptionName() const {

   162       return "lemon::RuntimeError";

   163     }

   164   };

   166   ///\e

   167   class RangeError : public RuntimeError {

   168   public:

   169     virtual const char* exceptionName() const {

   170       return "lemon::RangeError";

   171     }

   172   };

   174   ///\e

   175   class IOError : public RuntimeError {

   176   public:

   177     virtual const char* exceptionName() const {

   178       return "lemon::IOError";

   179     }

   180   };

   182   ///\e

   183   class DataFormatError : public IOError {

   184   protected:

   185     const char *_message;

   186     int _line;

   187     boost::shared_ptr<std::string> _file;

   189   public:

   190     ///\e

   191     explicit DataFormatError(const char *the_message)

   192       : _message(the_message), _line(0) {}

   193     ///\e

   194     DataFormatError(const std::string &file_name, int line_num,

   195 		    const char *the_message)

   196       : _message(the_message), _line(line_num) { file(file_name); }

   198     ///\e

   199     void line(int line_num) { _line=line_num; }

   200     ///\e

   201     void message(char *the_message) { _message=the_message; }

   202     ///\e

   203     void file(const std::string &file_name) {

   204       try {

   205 	_file.reset(new std::string);

   206 	*_file = file_name;

   207       }

   208       catch(...) {

   209 	_file.reset();

   210       }

   211     }

   213     ///\e

   214     int line() const { return _line; }

   215     ///\e

   216     const char* message() const { return _message; }

   218     /// \brief Returns the filename.

   219     ///

   220     /// Returns \e "(unknown)" if the filename was not specified.

   221     const char* file() const {

   222       if( _file )

   223 	return _file->c_str();

   224       else

   225 	return "(unknown)";

   226     }

   228     ///\e

   229     virtual const char* what() const throw() {

   230       const char *mes = 0;

   231       try {

   232 	std::ostringstream ostr;

   233 	ostr << _message;

   234 	if( _file || _line ) {

   235 	  ostr << " (";

   236 	  if( _file ) ostr << "in file '" << *_file << "'";

   237 	  if( _file && _line ) ostr << " ";

   238 	  if( _line ) ostr << "at line " << _line;

   239 	  ostr << ")";

   240 	}

   241 	mes = ostr.str().c_str();

   242       }

   243       catch(...) {}

   244       if( mes ) return mes;

   245       return exceptionName();

   246     }

   248     virtual const char* exceptionName() const {

   249       return "lemon::DataFormatError";

   250     }

   252     virtual ~DataFormatError() throw() {}

   253   };

   256   ///\e

   257   class AssertionFailedError : public LogicError {

   258   protected:

   259     const char *assertion;

   260     const char *file;

   261     int line;

   262     const char *function;

   263     const char *message;

   264   public:

   265     ///\e

   266     AssertionFailedError(const char *_file, int _line, const char *func,

   267 			 const char *msg, const char *_assertion = 0) :

   268       assertion(_assertion), file(_file), line(_line), function(func),

   269       message(msg) {}

   271     ///\e

   272     const char* get_assertion() const { return assertion; }

   273     ///\e

   274     const char* get_message() const { return message; }

   275     ///\e

   276     const char* get_file() const { return file; }

   277     ///\e

   278     const char* get_function() const { return function; }

   279     ///\e

   280     int get_line() const { return line; }

   283     virtual const char* what() const throw() {

   284       const char *mes = 0;

   285       try {

   286 	std::ostringstream ostr;

   287 	ostr << file << ":" << line << ": ";

   288 	if( function )

   289 	  ostr << function << ": ";

   290 	ostr << message;

   291 	if( assertion )

   292 	  ostr << " (assertion '" << assertion << "' failed)";

   293 	mes = ostr.str().c_str();

   294       }

   295       catch(...) {}

   296       if( mes ) return mes;

   297       return exceptionName();

   298     }

   300     virtual const char* exceptionName() const {

   301       return "lemon::AssertionFailedError";

   302     }

   304     virtual ~AssertionFailedError() throw() {}

   305   };

   308   /****************  Macros  ****************/

   311   inline

   312   void assert_fail(const char *file, int line, const char *func,

   313 		   const char *message, const char *assertion = 0,

   314 		   bool do_abort=true)

   315   {

   316     using namespace std;

   317     cerr << file << ":" << line << ": ";

   318     if( func )

   319       cerr << func << ": ";

   320     cerr << message;

   321     if( assertion )

   322       cerr << " (assertion '" << assertion << "' failed)";

   323     cerr << endl;

   324     if(do_abort)

   325       abort();

   326   }

   328   inline

   329   void assert_fail_throw(const char *file, int line, const char *func,

   330 		   const char *message, const char *assertion = 0,

   331 		   bool = true)

   332   {

   333     throw AssertionFailedError(file, line, func, message, assertion);

   334   }

   337 }

   338 #endif // LEMON_ERROR_H

   340 #undef LEMON_ASSERT

   341 #undef LEMON_FIXME

   343 #ifndef LEMON_ASSERT_ABORT

   344 #  define LEMON_ASSERT_ABORT 1

   345 #endif

   347 #ifndef LEMON_ASSERT_HANDLER

   348 #  ifdef LEMON_ASSERT_EXCEPTION

   349 #    define LEMON_ASSERT_HANDLER ::lemon::assert_fail_throw

   350 #  else

   351 #    define LEMON_ASSERT_HANDLER ::lemon::assert_fail

   352 #  endif

   353 #endif

   355 #if defined(NDEBUG) || defined(LEMON_DISABLE_ASSERTS)

   357 #  define LEMON_ASSERT(exp, msg)  (static_cast<void> (0))

   359 #else

   361 /**

   362  * \brief Macro for assertions with customizable message

   363  *

   364  * Macro for assertions with customizable message.

   365  *

   366  * The behaviour can be customized with LEMON_ASSERT_HANDLER,

   367  * LEMON_ASSERT_EXCEPTION and LEMON_ASSERT_ABORT defines. Asserts can be

   368  * disabled by defining either NDEBUG or LEMON_DISABLE_ASSERTS macros.

   369  *

   370  * \todo We should provide some way to reset to the default behaviour,

   371  * shouldn't we?

   372  *

   373  * \todo This whole 'assert' business should be placed in a separate

   374  * include file.

   375  *

   376  * \todo __PRETTY_FUNCTION__ should be replaced by something

   377  * compiler-independant, like BOOST_CURRENT_FUNCTION

   378  */

   380 #  define LEMON_ASSERT(exp, msg)                 \

   381      (static_cast<void> (!!(exp) ? 0 : (         \

   382        LEMON_ASSERT_HANDLER(__FILE__, __LINE__,  \

   383                             __PRETTY_FUNCTION__, \

   384 			    (msg), #exp, LEMON_ASSERT_ABORT), 0)))

   386 #endif // NDEBUG || LEMON_DISABLE_ASSERTS

   388 /**

   389  * \brief Macro for mark not yet implemented features.

   390  *

   391  * \todo Is this the right place for this? It should be used only in

   392  * modules under development.

   393  *

   394  * \todo __PRETTY_FUNCTION__ should be replaced by something

   395  * compiler-independant, like BOOST_CURRENT_FUNCTION

   396  */

   398 # define LEMON_FIXME(msg) \

   399     (LEMON_ASSERT_HANDLER(__FILE__, __LINE__, __PRETTY_FUNCTION__, \

   400 			  "FIXME: " msg))

author	alpar
	Sun, 06 Feb 2005 20:08:25 +0000
changeset 1131	425731cb66de
parent 1122	3ce7fc516cca
child 1151	b217fc69f913
permissions	-rw-r--r--