[906] | 1 | /* -*- C++ -*- |
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[921] | 2 | * src/lemon/error.h - Part of LEMON, a generic C++ optimization library |
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[906] | 3 | * |
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| 4 | * Copyright (C) 2004 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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| 5 | * (Egervary Combinatorial Optimization Research Group, EGRES). |
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| 6 | * |
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| 7 | * Permission to use, modify and distribute this software is granted |
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| 8 | * provided that this copyright notice appears in all copies. For |
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| 9 | * precise terms see the accompanying LICENSE file. |
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| 10 | * |
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| 11 | * This software is provided "AS IS" with no warranty of any kind, |
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| 12 | * express or implied, and with no claim as to its suitability for any |
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| 13 | * purpose. |
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| 14 | * |
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| 15 | */ |
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[883] | 16 | |
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[921] | 17 | #ifndef LEMON_ERROR_H |
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| 18 | #define LEMON_ERROR_H |
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[883] | 19 | |
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| 20 | //! \ingroup misc |
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| 21 | //! \file |
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| 22 | //! \brief Basic error handling (signaling) routines. |
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| 23 | |
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| 24 | #include <exception> |
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| 25 | #include <string> |
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| 26 | #include <sstream> |
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| 27 | |
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[1056] | 28 | #include <boost/shared_ptr.hpp> |
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[883] | 29 | |
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[921] | 30 | namespace lemon { |
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[883] | 31 | |
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[1056] | 32 | /// Exception-safe convenient "error message" class. |
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| 33 | class ErrorMessage { |
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| 34 | protected: |
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| 35 | boost::shared_ptr<std::ostringstream> buf; |
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| 36 | |
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| 37 | bool init() throw() { |
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| 38 | try { |
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| 39 | buf.reset(new std::ostringstream); |
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| 40 | } |
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| 41 | catch(...) { |
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| 42 | buf.reset(); |
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| 43 | } |
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| 44 | return buf; |
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| 45 | } |
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| 46 | |
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| 47 | public: |
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| 48 | |
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| 49 | ErrorMessage() throw() { init(); } |
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| 50 | |
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| 51 | ErrorMessage(const char *message) throw() { |
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| 52 | init(); |
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| 53 | *this << message; |
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| 54 | } |
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| 55 | |
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| 56 | ErrorMessage(const std::string &message) throw() { |
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| 57 | init(); |
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| 58 | *this << message; |
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| 59 | } |
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| 60 | |
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| 61 | template <typename T> |
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| 62 | ErrorMessage& operator<<(const T &t) throw() { |
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| 63 | if( !buf ) return *this; |
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| 64 | |
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| 65 | try { |
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| 66 | *buf << t; |
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| 67 | } |
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| 68 | catch(...) { |
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| 69 | buf.reset(); |
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| 70 | } |
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| 71 | } |
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| 72 | |
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| 73 | const char* message() throw() { |
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| 74 | if( !buf ) return 0; |
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| 75 | |
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| 76 | const char* mes = 0; |
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| 77 | try { |
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| 78 | mes = buf->str().c_str(); |
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| 79 | } |
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| 80 | catch(...) {} |
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| 81 | return mes; |
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| 82 | } |
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| 83 | |
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| 84 | }; |
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| 85 | |
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[883] | 86 | /** |
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| 87 | * \brief Generic exception class. |
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| 88 | * |
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[1056] | 89 | * Base class for exceptions used in LEMON. |
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[883] | 90 | */ |
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[1056] | 91 | class Exception : public std::exception, public ErrorMessage { |
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[883] | 92 | public: |
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[1056] | 93 | Exception() throw() {} |
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| 94 | explicit Exception(const std::string &s) throw() |
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| 95 | : ErrorMessage(s) {} |
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[883] | 96 | virtual ~Exception() throw() {} |
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| 97 | |
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| 98 | virtual const char* what() const throw() { |
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[1056] | 99 | const char *mes = message(); |
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| 100 | if( mes ) return mes; |
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| 101 | return "lemon::Exception"; |
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| 102 | } |
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| 103 | }; |
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| 104 | |
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| 105 | |
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| 106 | class LogicError : public Exception { |
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| 107 | explicit LogicError(const std::string &s) |
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| 108 | : Exception(s) {} |
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| 109 | }; |
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| 110 | |
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| 111 | class RuntimeError : public Exception { |
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| 112 | explicit RuntimeError(const std::string &s) |
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| 113 | : Exception(s) {} |
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| 114 | }; |
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| 115 | |
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| 116 | class RangeError : public RuntimeError { |
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| 117 | explicit RangeError(const std::string &s) |
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| 118 | : RuntimeError(s) {} |
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| 119 | }; |
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| 120 | |
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| 121 | class IOError : public RuntimeError { |
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| 122 | explicit IOError(const std::string &s) |
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| 123 | : RuntimeError(s) {} |
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| 124 | }; |
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| 125 | |
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| 126 | class DataFormatError : public IOError { |
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| 127 | explicit DataFormatError(const std::string &message) |
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| 128 | : IOError(message) : line(0) {} |
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| 129 | DataFormatError(const std::string &file_name, int line_num, |
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| 130 | sconst std::string &message) |
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| 131 | : IOError(message), line(line_num) { set_file(file_name); } |
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| 132 | |
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| 133 | void set_line(int line_num) { line=line_num; } |
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| 134 | void set_file(const std::string &file_name) { |
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| 135 | try { |
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| 136 | file.reset(new std::string); |
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| 137 | *file = file_name; |
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| 138 | } |
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| 139 | catch(...) { |
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| 140 | file.reset(); |
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| 141 | } |
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[883] | 142 | } |
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| 143 | |
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[1056] | 144 | virtual const char* what() const { |
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| 145 | const char *mes = 0; |
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| 146 | try { |
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| 147 | std::ostringstream ostr; |
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| 148 | ostr << IOError::what(); |
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| 149 | if( file || line ) { |
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| 150 | ostr << " ("; |
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| 151 | if( file ) ostr << "in file" << *file; |
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| 152 | if( line ) ostr << " at line" << line; |
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| 153 | } |
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| 154 | mes = ostr.str().c_str(); |
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| 155 | } |
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| 156 | catch(...) {} |
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| 157 | if( mes ) return mes; |
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| 158 | return "lemon::DataFormatError"; |
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| 159 | } |
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[883] | 160 | }; |
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| 161 | |
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[1056] | 162 | |
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| 163 | |
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| 164 | /**************** Macros ****************/ |
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| 165 | |
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| 166 | |
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[883] | 167 | /** |
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[1056] | 168 | * \brief Macro for assertions with customizable message |
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[883] | 169 | */ |
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[1056] | 170 | |
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| 171 | # define lemon_assert(exp, msg) \ |
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| 172 | if(!(exp)) { \ |
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| 173 | std::cerr << __FILE__ ":" << __LINE__ << ": " << (msg) << std::endl; \ |
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| 174 | abort; \ |
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| 175 | } |
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| 176 | |
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[883] | 177 | |
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| 178 | /** |
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| 179 | * \brief Macro for mark not yet implemented features. |
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| 180 | * |
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| 181 | * \todo Is this the right place for this? It should be used only in |
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| 182 | * modules under development. |
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| 183 | */ |
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| 184 | |
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[1056] | 185 | # define FIXME(msg) lemon_assert(0, "FIXME: " msg) |
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[883] | 186 | |
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| 187 | } |
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[921] | 188 | #endif // LEMON_ERROR_H |
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