COIN-OR::LEMON - Graph Library

source: lemon-0.x/lemon/error.h @ 1865:dcefd1d1377f

Last change on this file since 1865:dcefd1d1377f was 1845:f8bbfed86036, checked in by Balazs Dezso, 14 years ago

Implementation redesign
Throws exception

File size: 15.3 KB
Line 
1/* -*- C++ -*-
2 * lemon/error.h - Part of LEMON, a generic C++ optimization library
3 *
4 * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi
5 * Kutatocsoport (Egervary Research Group on Combinatorial Optimization,
6 * EGRES).
7 *
8 * Permission to use, modify and distribute this software is granted
9 * provided that this copyright notice appears in all copies. For
10 * precise terms see the accompanying LICENSE file.
11 *
12 * This software is provided "AS IS" with no warranty of any kind,
13 * express or implied, and with no claim as to its suitability for any
14 * purpose.
15 *
16 */
17
18#ifndef LEMON_ERROR_H
19#define LEMON_ERROR_H
20
21//! \ingroup exceptions
22//! \file
23//! \brief Basic exception classes and error handling.
24
25#include <exception>
26#include <string>
27#include <sstream>
28#include <iostream>
29#include <cstdlib>
30#include <memory>
31
32namespace lemon {
33
34  /// \addtogroup exceptions
35  /// @{
36 
37  /// \brief Exception safe wrapper class.
38  ///
39  /// Exception safe wrapper class to implement the members of exceptions.
40  template <typename _Type>
41  class ExceptionMember {
42  public:
43    typedef _Type Type;
44
45    ExceptionMember() throw () {
46      try {
47        ptr.reset(new Type());
48      } catch (...) {}
49    }
50
51    ExceptionMember(const Type& type) throw () {
52      try {
53        ptr.reset(new Type());
54        if (ptr.get() == 0) return;
55        *ptr = type;
56      } catch (...) {}
57    }
58
59    ExceptionMember(const ExceptionMember& copy) throw() {
60      try {
61        if (!copy.valid()) return;
62        ptr.reset(new Type());
63        if (ptr.get() == 0) return;
64        *ptr = copy.get();
65      } catch (...) {}
66    }
67
68    ExceptionMember& operator=(const ExceptionMember& copy) {
69      if (ptr.get() == 0) return;
70      try {
71        if (!copy.valid()) return;
72        *ptr = copy.get();
73      } catch (...) {}
74    }
75
76    void set(const Type& type) {
77      if (ptr.get() == 0) return;
78      try {
79        *ptr = type;
80      } catch (...) {}
81    }
82
83    const Type& get() const {
84      return *ptr;
85    }
86
87    bool valid() const {
88      return ptr.get() != 0;
89    }
90   
91  private:
92    std::auto_ptr<_Type> ptr;
93  };
94
95  /// Exception-safe convenient "error message" class.
96
97  /// Helper class which provides a convenient ostream-like (operator <<
98  /// based) interface to create a string message. Mostly useful in
99  /// exception classes (therefore the name).
100  class ErrorMessage {
101  protected:
102    ///\e
103
104    ///\todo The good solution is boost::shared_ptr...
105    ///
106    mutable
107    std::auto_ptr<std::ostringstream> buf;
108   
109    ///\e
110    bool init() throw() {
111      try {
112        buf.reset(new std::ostringstream);
113      }
114      catch(...) {
115        buf.reset();
116      }
117      return buf.get();
118    }
119
120  public:
121
122    ///\e
123    ErrorMessage() throw() { init(); }
124
125    ErrorMessage(const ErrorMessage& em) throw() : buf(em.buf) { }
126
127    ///\e
128    ErrorMessage(const char *message) throw() {
129      init();
130      *this << message;
131    }
132
133    ///\e
134    ErrorMessage(const std::string &message) throw() {
135      init();
136      *this << message;
137    }
138
139    ///\e
140    template <typename T>
141    ErrorMessage& operator<<(const T &t) throw() {
142      if( ! buf.get() ) return *this;
143
144      try {
145        *buf << t;
146      }
147      catch(...) {
148        buf.reset();
149      }
150      return *this;
151    }
152
153    ///\e
154    const char* message() throw() {
155      if( ! buf.get() ) return 0;
156
157      const char* mes = 0;
158      try {
159        mes = buf->str().c_str();
160      }
161      catch(...) {}
162      return mes;
163    }
164   
165  };
166
167  /**
168   * \brief Generic exception class.
169   *
170   * Base class for exceptions used in LEMON.
171   */
172  class Exception : public std::exception {
173  public:
174    ///\e
175    Exception() {}
176    ///\e
177    virtual ~Exception() throw() {}
178
179    ///\e
180    virtual const char* exceptionName() const {
181      return "lemon::Exception";
182    }
183   
184    ///\e
185    virtual const char* what() const throw() {
186      return exceptionName();
187    }
188  };
189
190  /**
191   * \brief One of the two main subclasses of \ref Exception.
192   *
193   * Logic errors represent problems in the internal logic of a program;
194   * in theory, these are preventable, and even detectable before the
195   * program runs (e.g., violations of class invariants).
196   *
197   * A typical example for this is \ref UninitializedParameter.
198   */
199  class LogicError : public Exception {
200  public:
201    virtual const char* exceptionName() const {
202      return "lemon::LogicError";
203    }
204  };
205
206  /**
207   * \brief \ref Exception for uninitialized parameters.
208   *
209   * This error represents problems in the initialization
210   * of the parameters of the algorithms.
211   */
212  class UninitializedParameter : public LogicError {
213  public:
214    virtual const char* exceptionName() const {
215      return "lemon::UninitializedParameter";
216    }
217  };
218
219 
220  /**
221   * \brief One of the two main subclasses of \ref Exception.
222   *
223   * Runtime errors represent problems outside the scope of a program;
224   * they cannot be easily predicted and can generally only be caught as
225   * the program executes.
226   */
227  class RuntimeError : public Exception {
228  public:
229    virtual const char* exceptionName() const {
230      return "lemon::RuntimeError";
231    }
232  };
233
234  ///\e
235  class RangeError : public RuntimeError {
236  public:
237    virtual const char* exceptionName() const {
238      return "lemon::RangeError";
239    }
240  };
241
242  ///\e
243  class IOError : public RuntimeError {
244  public:
245    virtual const char* exceptionName() const {
246      return "lemon::IOError";
247    }
248  };
249
250  ///\e
251  class DataFormatError : public IOError {
252  protected:
253    ExceptionMember<std::string> _message;
254    ExceptionMember<std::string> _file;
255    int _line;
256
257    mutable ExceptionMember<std::string> _message_holder;
258  public:
259
260    DataFormatError(const DataFormatError &dfe) :
261      IOError(dfe), _message(dfe._message), _file(dfe._file),
262      _line(dfe._line) {}
263
264    ///\e
265    explicit DataFormatError(const char *the_message)
266      : _message(the_message), _line(0) {}
267
268    ///\e
269    DataFormatError(const std::string &file_name, int line_num,
270                    const char *the_message)
271      : _message(the_message), _line(line_num) { file(file_name); }
272
273    ///\e
274    void line(int line) { _line = line; }
275    ///\e
276    void message(const std::string& message) { _message.set(message); }
277    ///\e
278    void file(const std::string &file) { _file.set(file); }
279 
280    ///\e
281    int line() const { return _line; }
282    ///\e
283    const char* message() const {
284      if (_message.valid() && !_message.get().empty()) {
285        return _message.get().c_str();
286      } else {
287        return 0;
288      }
289    }
290
291    /// \brief Returns the filename.
292    ///
293    /// Returns \e null if the filename was not specified.
294    const char* file() const {
295      if (_file.valid() && !_file.get().empty()) {
296        return _file.get().c_str();
297      } else {
298        return 0;
299      }
300    }
301
302    ///\e
303    virtual const char* what() const throw() {
304      try {
305        std::ostringstream ostr;
306        ostr << exceptionName() << ": ";
307        if (message()) ostr << message();
308        if( file() || line() != 0 ) {
309          ostr << " (";
310          if( file() ) ostr << "in file '" << file() << "'";
311          if( file() && line() != 0 ) ostr << " ";
312          if( line() != 0 ) ostr << "at line " << line();
313          ostr << ")";
314        }
315        _message_holder.set(ostr.str());
316      }
317      catch (...) {}
318      if( _message_holder.valid()) return _message_holder.get().c_str();
319      return exceptionName();
320    }
321
322    virtual const char* exceptionName() const {
323      return "lemon::DataFormatError";
324    }
325
326    virtual ~DataFormatError() throw() {}
327  };
328
329  ///\e
330  class FileOpenError : public IOError {
331  protected:
332    ExceptionMember<std::string> _file;
333
334    mutable ExceptionMember<std::string> _message_holder;
335  public:
336
337    FileOpenError(const FileOpenError &foe) :
338      IOError(foe), _file(foe._file) {}
339
340    ///\e
341    explicit FileOpenError(const std::string& file)
342      : _file(file) {}
343
344
345    ///\e
346    void file(const std::string &file) { _file.set(file); }
347 
348    /// \brief Returns the filename.
349    ///
350    /// Returns \e null if the filename was not specified.
351    const char* file() const {
352      if (_file.valid() && !_file.get().empty()) {
353        return _file.get().c_str();
354      } else {
355        return 0;
356      }
357    }
358
359    ///\e
360    virtual const char* what() const throw() {
361      try {
362        std::ostringstream ostr;
363        ostr << exceptionName() << ": ";
364        ostr << "Cannot open file - " << file();
365        _message_holder.set(ostr.str());
366      }
367      catch (...) {}
368      if( _message_holder.valid()) return _message_holder.get().c_str();
369      return exceptionName();
370    }
371
372    virtual const char* exceptionName() const {
373      return "lemon::FileOpenError";
374    }
375
376    virtual ~FileOpenError() throw() {}
377  };
378
379  class IOParameterError : public IOError {
380  protected:
381    ExceptionMember<std::string> _message;
382    ExceptionMember<std::string> _file;
383
384    mutable ExceptionMember<std::string> _message_holder;
385  public:
386
387    IOParameterError(const IOParameterError &ile) :
388      IOError(ile), _message(ile._message), _file(ile._file) {}
389
390    ///\e
391    explicit IOParameterError(const char *the_message)
392      : _message(the_message) {}
393
394    ///\e
395    IOParameterError(const char *file_name, const char *the_message)
396      : _message(the_message), _file(file_name) {}
397
398     ///\e
399    void message(const std::string& message) { _message.set(message); }
400    ///\e
401    void file(const std::string &file) { _file.set(file); }
402 
403     ///\e
404    const char* message() const {
405      if (_message.valid()) {
406        return _message.get().c_str();
407      } else {
408        return 0;
409      }
410    }
411
412    /// \brief Returns the filename.
413    ///
414    /// Returns \e null if the filename was not specified.
415    const char* file() const {
416      if (_file.valid()) {
417        return _file.get().c_str();
418      } else {
419        return 0;
420      }
421    }
422
423    ///\e
424    virtual const char* what() const throw() {
425      try {
426        std::ostringstream ostr;
427        if (message()) ostr << message();
428        if (file()) ostr << "(when reading file '" << file() << "')";
429        _message_holder.set(ostr.str());
430      }
431      catch (...) {}
432      if( _message_holder.valid() ) return _message_holder.get().c_str();
433      return exceptionName();
434    }
435
436    virtual const char* exceptionName() const {
437      return "lemon::IOParameterError";
438    }
439
440    virtual ~IOParameterError() throw() {}
441  };
442
443
444  ///\e
445  class AssertionFailedError : public LogicError {
446  protected:
447    const char *assertion;
448    const char *file;
449    int line;
450    const char *function;
451    const char *message;
452
453    mutable ExceptionMember<std::string> _message_holder;
454  public:
455    ///\e
456    AssertionFailedError(const char *_file, int _line, const char *func,
457                         const char *msg, const char *_assertion = 0) :
458      assertion(_assertion), file(_file), line(_line), function(func),
459      message(msg) {}
460
461    ///\e
462    const char* get_assertion() const { return assertion; }
463    ///\e
464    const char* get_message() const { return message; }
465    ///\e
466    const char* get_file() const { return file; }
467    ///\e
468    const char* get_function() const { return function; }
469    ///\e
470    int get_line() const { return line; }
471
472
473    virtual const char* what() const throw() {
474      try {
475        std::ostringstream ostr;
476        ostr << file << ":" << line << ": ";
477        if( function )
478          ostr << function << ": ";
479        ostr << message;
480        if( assertion )
481           ostr << " (assertion '" << assertion << "' failed)";
482        _message_holder.set(ostr.str());
483        return ostr.str().c_str();
484      }
485      catch(...) {}
486      if( _message_holder.valid() ) return _message_holder.get().c_str();
487      return exceptionName();
488    }
489
490    virtual const char* exceptionName() const {
491      return "lemon::AssertionFailedError";
492    }
493
494    virtual ~AssertionFailedError() throw() {}
495  };
496
497
498  /****************  Macros  ****************/
499
500
501  template <typename Exception>
502  inline void assert_fail(const char *file, int line, const char *func,
503                   Exception exception, const char *assertion = 0,
504                   bool do_abort=true)
505  {
506    using namespace std;
507    cerr << file << ":" << line << ": ";
508    if( func )
509      cerr << func << ": ";
510    cerr << exception.what();
511    if( assertion )
512      cerr << " (assertion '" << assertion << "' failed)";
513    cerr << endl;
514    if(do_abort)
515      abort();
516  }
517
518  template <>
519  inline void assert_fail<const char *>(const char *file, int line, const char *func,
520                                 const char *message,
521                                 const char *assertion,
522                                 bool do_abort)
523  {
524    using namespace std;
525    cerr << file << ":" << line << ": ";
526    if( func )
527      cerr << func << ": ";
528    cerr << message;
529    if( assertion )
530      cerr << " (assertion '" << assertion << "' failed)";
531    cerr << endl;
532    if(do_abort)
533      abort();
534  }
535
536  template <typename Exception>
537  inline void assert_fail_failure(const char *file, int line, const char *func,
538                           Exception exception,
539                           const char *assertion = 0,
540                           bool = true)
541  {
542    throw AssertionFailedError(file, line, func, exception.what(), assertion);
543  }
544
545  template <>
546  inline void assert_fail_failure<const char *>(const char *file, int line,
547                                         const char *func,
548                                         const char *message,
549                                         const char *assertion,
550                                         bool)
551  {
552    throw AssertionFailedError(file, line, func, message, assertion);
553  }
554
555  template <typename Exception>
556  inline void assert_fail_exception(const char *file, int line, const char *func,
557                             Exception exception,
558                             const char *assertion = 0, bool = true)
559  {
560    throw exception;
561  }
562
563  template <>
564  inline void assert_fail_exception<const char *>(const char *file, int line,
565                                           const char *func,
566                                           const char *message,
567                                           const char *assertion,
568                                           bool)
569  {
570    throw AssertionFailedError(file, line, func, message, assertion);
571  }
572
573/// @}
574
575}
576#endif // LEMON_ERROR_H
577
578#undef LEMON_ASSERT
579#undef LEMON_FIXME
580
581#ifndef LEMON_ASSERT_ABORT
582#  define LEMON_ASSERT_ABORT 1
583#endif
584
585#ifndef LEMON_ASSERT_HANDLER
586#  if defined LEMON_ASSERT_EXCEPTION
587#    define LEMON_ASSERT_HANDLER ::lemon::assert_fail_exception
588#  elif defined LEMON_ASSERT_FAILURE
589#    define LEMON_ASSERT_HANDLER ::lemon::assert_fail_failure
590#  else
591#    define LEMON_ASSERT_HANDLER ::lemon::assert_fail
592#  endif
593#endif
594
595#if defined(NDEBUG) || defined(LEMON_DISABLE_ASSERTS)
596
597#  define LEMON_ASSERT(exp, msg)  (static_cast<void> (0))
598
599#else
600
601/**
602 * \brief Macro for assertions with customizable message
603 *
604 * Macro for assertions with customizable message.
605 *
606 * The behaviour can be customized with LEMON_ASSERT_HANDLER,
607 * LEMON_ASSERT_EXCEPTION and LEMON_ASSERT_ABORT defines. Asserts can be
608 * disabled by defining either NDEBUG or LEMON_DISABLE_ASSERTS macros.
609 *
610 * \todo We should provide some way to reset to the default behaviour,
611 * shouldn't we?
612 *
613 * \todo This whole 'assert' business should be placed in a separate
614 * include file. The boost assert is not guarded by header sentries
615 * which may help to change the behaviour of the assertions in
616 * the files.
617 *
618 * \todo __PRETTY_FUNCTION__ should be replaced by something
619 * compiler-independent, like BOOST_CURRENT_FUNCTION
620 */
621
622#  define LEMON_ASSERT(exp, msg)                 \
623     (static_cast<void> (!!(exp) ? 0 : (         \
624       LEMON_ASSERT_HANDLER(__FILE__, __LINE__,  \
625                            __PRETTY_FUNCTION__, \
626                            msg, #exp, LEMON_ASSERT_ABORT), 0)))
627
628#endif // NDEBUG || LEMON_DISABLE_ASSERTS
629
630/**
631 * \brief Macro for mark not yet implemented features.
632 *
633 * \todo Is this the right place for this? It should be used only in
634 * modules under development.
635 *
636 * \todo __PRETTY_FUNCTION__ should be replaced by something
637 * compiler-independent, like BOOST_CURRENT_FUNCTION
638 */
639
640# define LEMON_FIXME(msg) \
641    (LEMON_ASSERT_HANDLER(__FILE__, __LINE__, __PRETTY_FUNCTION__, \
642                          "FIXME: " msg))
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