lemon/assert.h
author Balazs Dezso <deba@inf.elte.hu>
Thu, 04 Mar 2010 15:20:59 +0100
changeset 951 41d7ac528c3a
parent 290 f6899946c1ac
child 1242 0e30f63d45d0
permissions -rw-r--r--
Uniforming primal scale to 2 (#314)
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/* -*- mode: C++; indent-tabs-mode: nil; -*-
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 *
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 * This file is a part of LEMON, a generic C++ optimization library.
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 *
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 * Copyright (C) 2003-2009
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 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
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 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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 *
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 * Permission to use, modify and distribute this software is granted
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 * provided that this copyright notice appears in all copies. For
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 * precise terms see the accompanying LICENSE file.
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 *
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 * This software is provided "AS IS" with no warranty of any kind,
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 * express or implied, and with no claim as to its suitability for any
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 * purpose.
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 *
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 */
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#ifndef LEMON_ASSERT_H
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#define LEMON_ASSERT_H
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/// \ingroup exceptions
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/// \file
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/// \brief Extended assertion handling
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#include <lemon/error.h>
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namespace lemon {
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  inline void assert_fail_abort(const char *file, int line,
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                                const char *function, const char* message,
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                                const char *assertion)
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  {
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    std::cerr << file << ":" << line << ": ";
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    if (function)
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      std::cerr << function << ": ";
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    std::cerr << message;
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    if (assertion)
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      std::cerr << " (assertion '" << assertion << "' failed)";
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    std::cerr << std::endl;
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    std::abort();
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  }
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  namespace _assert_bits {
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    inline const char* cstringify(const std::string& str) {
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      return str.c_str();
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    }
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    inline const char* cstringify(const char* str) {
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      return str;
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    }
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  }
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}
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#endif // LEMON_ASSERT_H
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#undef LEMON_ASSERT
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#undef LEMON_DEBUG
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#if (defined(LEMON_ASSERT_ABORT) ? 1 : 0) +               \
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  (defined(LEMON_ASSERT_CUSTOM) ? 1 : 0) > 1
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#error "LEMON assertion system is not set properly"
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#endif
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#if ((defined(LEMON_ASSERT_ABORT) ? 1 : 0) +            \
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     (defined(LEMON_ASSERT_CUSTOM) ? 1 : 0) == 1 ||     \
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     defined(LEMON_ENABLE_ASSERTS)) &&                  \
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  (defined(LEMON_DISABLE_ASSERTS) ||                    \
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   defined(NDEBUG))
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#error "LEMON assertion system is not set properly"
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#endif
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#if defined LEMON_ASSERT_ABORT
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#  undef LEMON_ASSERT_HANDLER
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#  define LEMON_ASSERT_HANDLER ::lemon::assert_fail_abort
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#elif defined LEMON_ASSERT_CUSTOM
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#  undef LEMON_ASSERT_HANDLER
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#  ifndef LEMON_CUSTOM_ASSERT_HANDLER
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#    error "LEMON_CUSTOM_ASSERT_HANDLER is not set"
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#  endif
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#  define LEMON_ASSERT_HANDLER LEMON_CUSTOM_ASSERT_HANDLER
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#elif defined LEMON_DISABLE_ASSERTS
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#  undef LEMON_ASSERT_HANDLER
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#elif defined NDEBUG
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#  undef LEMON_ASSERT_HANDLER
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#else
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#  define LEMON_ASSERT_HANDLER ::lemon::assert_fail_abort
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#endif
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#ifndef LEMON_FUNCTION_NAME
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#  if defined __GNUC__
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#    define LEMON_FUNCTION_NAME (__PRETTY_FUNCTION__)
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#  elif defined _MSC_VER
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#    define LEMON_FUNCTION_NAME (__FUNCSIG__)
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#  elif __STDC_VERSION__ >= 199901L
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#    define LEMON_FUNCTION_NAME (__func__)
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#  else
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#    define LEMON_FUNCTION_NAME ("<unknown>")
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#  endif
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#endif
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#ifdef DOXYGEN
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/// \ingroup exceptions
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///
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/// \brief Macro for assertion with customizable message
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///
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/// Macro for assertion with customizable message.
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/// \param exp An expression that must be convertible to \c bool.  If it is \c
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/// false, then an assertion is raised. The concrete behaviour depends on the
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/// settings of the assertion system.
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/// \param msg A <tt>const char*</tt> parameter, which can be used to provide
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/// information about the circumstances of the failed assertion.
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///
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/// The assertions are enabled in the default behaviour.
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/// You can disable them with the following code:
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/// \code
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/// #define LEMON_DISABLE_ASSERTS
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/// \endcode
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/// or with compilation parameters:
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/// \code
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/// g++ -DLEMON_DISABLE_ASSERTS
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/// make CXXFLAGS='-DLEMON_DISABLE_ASSERTS'
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/// \endcode
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/// The checking is also disabled when the standard macro \c NDEBUG is defined.
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///
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/// As a default behaviour the failed assertion prints a short log message to
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/// the standard error and aborts the execution.
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///
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/// However, the following modes can be used in the assertion system:
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/// - \c LEMON_ASSERT_ABORT The failed assertion prints a short log message to
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///   the standard error and aborts the program. It is the default behaviour.
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/// - \c LEMON_ASSERT_CUSTOM The user can define own assertion handler
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///   function.
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///   \code
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///     void custom_assert_handler(const char* file, int line,
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///                                const char* function, const char* message,
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///                                const char* assertion);
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///   \endcode
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///   The name of the function should be defined as the \c
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///   LEMON_CUSTOM_ASSERT_HANDLER macro name.
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///   \code
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///     #define LEMON_CUSTOM_ASSERT_HANDLER custom_assert_handler
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///   \endcode
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///   Whenever an assertion is occured, the custom assertion
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///   handler is called with appropiate parameters.
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///
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/// The assertion mode can also be changed within one compilation unit.
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/// If the macros are redefined with other settings and the
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/// \ref lemon/assert.h "assert.h" file is reincluded, then the
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/// behaviour is changed appropiately to the new settings.
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#  define LEMON_ASSERT(exp, msg)                                        \
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  (static_cast<void> (!!(exp) ? 0 : (                                   \
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    LEMON_ASSERT_HANDLER(__FILE__, __LINE__,                            \
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                         LEMON_FUNCTION_NAME,                           \
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                         ::lemon::_assert_bits::cstringify(msg), #exp), 0)))
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/// \ingroup exceptions
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///
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/// \brief Macro for internal assertions
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///
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/// Macro for internal assertions, it is used in the library to check
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/// the consistency of results of algorithms, several pre- and
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/// postconditions and invariants. The checking is disabled by
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/// default, but it can be turned on with the macro \c
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/// LEMON_ENABLE_DEBUG.
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/// \code
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/// #define LEMON_ENABLE_DEBUG
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/// \endcode
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/// or with compilation parameters:
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/// \code
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/// g++ -DLEMON_ENABLE_DEBUG
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/// make CXXFLAGS='-DLEMON_ENABLE_DEBUG'
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/// \endcode
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///
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/// This macro works like the \c LEMON_ASSERT macro, therefore the
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/// current behaviour depends on the settings of \c LEMON_ASSERT
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/// macro.
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///
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/// \see LEMON_ASSERT
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#  define LEMON_DEBUG(exp, msg)                                         \
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  (static_cast<void> (!!(exp) ? 0 : (                                   \
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    LEMON_ASSERT_HANDLER(__FILE__, __LINE__,                            \
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                         LEMON_FUNCTION_NAME,                           \
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                         ::lemon::_assert_bits::cstringify(msg), #exp), 0)))
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#else
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#  ifndef LEMON_ASSERT_HANDLER
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#    define LEMON_ASSERT(exp, msg)  (static_cast<void>(0))
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#    define LEMON_DEBUG(exp, msg) (static_cast<void>(0))
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#  else
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#    define LEMON_ASSERT(exp, msg)                                      \
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       (static_cast<void> (!!(exp) ? 0 : (                              \
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        LEMON_ASSERT_HANDLER(__FILE__, __LINE__,                        \
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                             LEMON_FUNCTION_NAME,                       \
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                             ::lemon::_assert_bits::cstringify(msg),    \
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                             #exp), 0)))
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#    if LEMON_ENABLE_DEBUG
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#      define LEMON_DEBUG(exp, msg)                                     \
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         (static_cast<void> (!!(exp) ? 0 : (                            \
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           LEMON_ASSERT_HANDLER(__FILE__, __LINE__,                     \
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                                LEMON_FUNCTION_NAME,                    \
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                                ::lemon::_assert_bits::cstringify(msg), \
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                                #exp), 0)))
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#    else
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#      define LEMON_DEBUG(exp, msg) (static_cast<void>(0))
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#    endif
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#  endif
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#endif