[209] | 1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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[66] | 2 | * |
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[209] | 3 | * This file is a part of LEMON, a generic C++ optimization library. |
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[66] | 4 | * |
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| 5 | * Copyright (C) 2003-2008 |
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| 6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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| 7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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| 8 | * |
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| 9 | * Permission to use, modify and distribute this software is granted |
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| 10 | * provided that this copyright notice appears in all copies. For |
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| 11 | * precise terms see the accompanying LICENSE file. |
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| 12 | * |
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| 13 | * This software is provided "AS IS" with no warranty of any kind, |
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| 14 | * express or implied, and with no claim as to its suitability for any |
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| 15 | * purpose. |
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| 16 | * |
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| 17 | */ |
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| 18 | |
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| 19 | #ifndef LEMON_ERROR_H |
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| 20 | #define LEMON_ERROR_H |
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| 21 | |
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| 22 | /// \ingroup exceptions |
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| 23 | /// \file |
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| 24 | /// \brief Basic exception classes and error handling. |
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| 25 | |
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| 26 | #include <exception> |
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| 27 | #include <string> |
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| 28 | #include <sstream> |
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| 29 | #include <iostream> |
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| 30 | #include <cstdlib> |
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| 31 | #include <memory> |
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| 32 | |
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| 33 | namespace lemon { |
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| 34 | |
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| 35 | /// \addtogroup exceptions |
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| 36 | /// @{ |
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| 37 | |
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[290] | 38 | /// \brief Generic exception class. |
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[66] | 39 | /// |
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| 40 | /// Base class for exceptions used in LEMON. |
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| 41 | /// |
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| 42 | class Exception : public std::exception { |
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| 43 | public: |
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[290] | 44 | ///\e Constructor |
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[66] | 45 | Exception() {} |
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[290] | 46 | ///\e Virtual destructor |
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[66] | 47 | virtual ~Exception() throw() {} |
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[290] | 48 | ///\e A short description of the exception |
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[66] | 49 | virtual const char* what() const throw() { |
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| 50 | return "lemon::Exception"; |
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| 51 | } |
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| 52 | }; |
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| 53 | |
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[290] | 54 | /// \brief Input-Output error |
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| 55 | /// |
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| 56 | /// This exception is thrown when a file operation cannot be |
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| 57 | /// succeeded. |
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| 58 | class IoError : public Exception { |
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| 59 | protected: |
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| 60 | std::string _message; |
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| 61 | std::string _file; |
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[66] | 62 | |
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[290] | 63 | mutable std::string _what; |
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[66] | 64 | public: |
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[290] | 65 | |
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| 66 | /// Copy constructor |
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| 67 | IoError(const IoError &error) { |
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| 68 | message(error._message); |
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| 69 | file(error._file); |
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| 70 | } |
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| 71 | |
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| 72 | /// Constructor |
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| 73 | explicit IoError(const char *message) { |
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| 74 | IoError::message(message); |
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| 75 | } |
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| 76 | |
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| 77 | /// Constructor |
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| 78 | explicit IoError(const std::string &message) { |
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| 79 | IoError::message(message); |
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| 80 | } |
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| 81 | |
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| 82 | /// Constructor |
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| 83 | IoError(const std::string &file, const char *message) { |
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| 84 | IoError::message(message); |
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| 85 | IoError::file(file); |
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| 86 | } |
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| 87 | |
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| 88 | /// Constructor |
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| 89 | IoError(const std::string &file, const std::string &message) { |
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| 90 | IoError::message(message); |
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| 91 | IoError::file(file); |
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| 92 | } |
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| 93 | |
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| 94 | /// Virtual destructor |
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| 95 | virtual ~IoError() throw() {} |
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| 96 | |
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| 97 | /// Set the error message |
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| 98 | void message(const char *message) { |
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| 99 | try { |
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| 100 | _message = message; |
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| 101 | } catch (...) {} |
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| 102 | } |
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| 103 | |
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| 104 | /// Set the error message |
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| 105 | void message(const std::string& message) { |
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| 106 | try { |
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| 107 | _message = message; |
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| 108 | } catch (...) {} |
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| 109 | } |
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| 110 | |
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| 111 | /// Set the file name |
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| 112 | void file(const std::string &file) { |
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| 113 | try { |
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| 114 | _file = file; |
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| 115 | } catch (...) {} |
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| 116 | } |
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| 117 | |
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| 118 | /// Returns the error message |
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| 119 | const std::string& message() const { |
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| 120 | return _message; |
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| 121 | } |
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| 122 | |
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| 123 | /// \brief Returns the filename |
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| 124 | /// |
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| 125 | /// Returns the filename or empty string if the filename was not |
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| 126 | /// specified. |
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| 127 | const std::string& file() const { |
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| 128 | return _file; |
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| 129 | } |
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| 130 | |
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| 131 | /// \brief Returns a short error message |
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| 132 | /// |
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| 133 | /// Returns a short error message which contains the message, the |
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| 134 | /// file name and the line number. |
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[66] | 135 | virtual const char* what() const throw() { |
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[290] | 136 | try { |
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| 137 | _what.clear(); |
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| 138 | std::ostringstream oss; |
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| 139 | oss << "lemon:IoError" << ": "; |
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| 140 | oss << message(); |
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| 141 | if (!file().empty()) { |
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| 142 | oss << " ("; |
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| 143 | if (!file().empty()) oss << "with file '" << file() << "'"; |
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| 144 | oss << ")"; |
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| 145 | } |
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| 146 | _what = oss.str(); |
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| 147 | } |
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| 148 | catch (...) {} |
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| 149 | if (!_what.empty()) return _what.c_str(); |
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| 150 | else return "lemon:IoError"; |
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[66] | 151 | } |
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[290] | 152 | |
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[66] | 153 | }; |
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| 154 | |
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[290] | 155 | /// \brief Format error |
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| 156 | /// |
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| 157 | /// This class is used to indicate if an input file has wrong |
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| 158 | /// formatting, or a data representation is not legal. |
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| 159 | class FormatError : public Exception { |
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[66] | 160 | protected: |
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[290] | 161 | std::string _message; |
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| 162 | std::string _file; |
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[66] | 163 | int _line; |
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| 164 | |
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[290] | 165 | mutable std::string _what; |
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[66] | 166 | public: |
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| 167 | |
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[290] | 168 | /// Copy constructor |
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| 169 | FormatError(const FormatError &error) { |
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| 170 | message(error._message); |
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| 171 | file(error._file); |
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| 172 | line(error._line); |
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[66] | 173 | } |
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| 174 | |
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[290] | 175 | /// Constructor |
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| 176 | explicit FormatError(const char *message) { |
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| 177 | FormatError::message(message); |
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| 178 | _line = 0; |
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[66] | 179 | } |
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| 180 | |
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[290] | 181 | /// Constructor |
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| 182 | explicit FormatError(const std::string &message) { |
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| 183 | FormatError::message(message); |
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| 184 | _line = 0; |
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| 185 | } |
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| 186 | |
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| 187 | /// Constructor |
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| 188 | FormatError(const std::string &file, int line, const char *message) { |
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| 189 | FormatError::message(message); |
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| 190 | FormatError::file(file); |
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| 191 | FormatError::line(line); |
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| 192 | } |
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| 193 | |
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| 194 | /// Constructor |
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| 195 | FormatError(const std::string &file, int line, const std::string &message) { |
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| 196 | FormatError::message(message); |
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| 197 | FormatError::file(file); |
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| 198 | FormatError::line(line); |
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| 199 | } |
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| 200 | |
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| 201 | /// Virtual destructor |
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| 202 | virtual ~FormatError() throw() {} |
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| 203 | |
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| 204 | /// Set the line number |
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| 205 | void line(int line) { _line = line; } |
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| 206 | |
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| 207 | /// Set the error message |
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| 208 | void message(const char *message) { |
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| 209 | try { |
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| 210 | _message = message; |
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| 211 | } catch (...) {} |
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| 212 | } |
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| 213 | |
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| 214 | /// Set the error message |
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| 215 | void message(const std::string& message) { |
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| 216 | try { |
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| 217 | _message = message; |
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| 218 | } catch (...) {} |
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| 219 | } |
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| 220 | |
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| 221 | /// Set the file name |
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| 222 | void file(const std::string &file) { |
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| 223 | try { |
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| 224 | _file = file; |
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| 225 | } catch (...) {} |
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| 226 | } |
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| 227 | |
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| 228 | /// \brief Returns the line number |
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| 229 | /// |
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| 230 | /// Returns the line number or zero if it was not specified. |
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| 231 | int line() const { return _line; } |
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| 232 | |
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| 233 | /// Returns the error message |
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| 234 | const std::string& message() const { |
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| 235 | return _message; |
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| 236 | } |
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| 237 | |
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| 238 | /// \brief Returns the filename |
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| 239 | /// |
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| 240 | /// Returns the filename or empty string if the filename was not |
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| 241 | /// specified. |
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| 242 | const std::string& file() const { |
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| 243 | return _file; |
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| 244 | } |
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| 245 | |
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| 246 | /// \brief Returns a short error message |
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| 247 | /// |
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| 248 | /// Returns a short error message which contains the message, the |
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| 249 | /// file name and the line number. |
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[66] | 250 | virtual const char* what() const throw() { |
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| 251 | try { |
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[290] | 252 | _what.clear(); |
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| 253 | std::ostringstream oss; |
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| 254 | oss << "lemon:FormatError" << ": "; |
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| 255 | oss << message(); |
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| 256 | if (!file().empty() || line() != 0) { |
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| 257 | oss << " ("; |
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| 258 | if (!file().empty()) oss << "in file '" << file() << "'"; |
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| 259 | if (!file().empty() && line() != 0) oss << " "; |
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| 260 | if (line() != 0) oss << "at line " << line(); |
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| 261 | oss << ")"; |
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[209] | 262 | } |
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[290] | 263 | _what = oss.str(); |
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[66] | 264 | } |
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| 265 | catch (...) {} |
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[290] | 266 | if (!_what.empty()) return _what.c_str(); |
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| 267 | else return "lemon:FormatError"; |
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[66] | 268 | } |
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| 269 | |
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| 270 | }; |
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| 271 | |
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[108] | 272 | /// @} |
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[66] | 273 | |
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| 274 | } |
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[108] | 275 | |
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[66] | 276 | #endif // LEMON_ERROR_H |
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