1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library. |
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4 | * |
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5 | * Copyright (C) 2003-2009 |
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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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38 | /// \brief Generic exception class. |
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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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44 | ///Constructor |
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45 | Exception() throw() {} |
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46 | ///Virtual destructor |
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47 | virtual ~Exception() throw() {} |
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48 | ///A short description of the exception |
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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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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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62 | |
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63 | mutable std::string _what; |
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64 | public: |
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65 | |
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66 | /// Copy constructor |
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67 | IoError(const IoError &error) throw() : Exception() { |
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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) throw() { |
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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) throw() { |
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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 | explicit IoError(const char *message, |
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84 | const std::string &file) throw() { |
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85 | IoError::message(message); |
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86 | IoError::file(file); |
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87 | } |
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88 | |
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89 | /// Constructor |
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90 | explicit IoError(const std::string &message, |
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91 | const std::string &file) throw() { |
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92 | IoError::message(message); |
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93 | IoError::file(file); |
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94 | } |
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95 | |
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96 | /// Virtual destructor |
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97 | virtual ~IoError() throw() {} |
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98 | |
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99 | /// Set the error message |
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100 | void message(const char *message) throw() { |
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101 | try { |
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102 | _message = message; |
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103 | } catch (...) {} |
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104 | } |
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105 | |
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106 | /// Set the error message |
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107 | void message(const std::string& message) throw() { |
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108 | try { |
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109 | _message = message; |
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110 | } catch (...) {} |
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111 | } |
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112 | |
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113 | /// Set the file name |
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114 | void file(const std::string &file) throw() { |
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115 | try { |
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116 | _file = file; |
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117 | } catch (...) {} |
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118 | } |
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119 | |
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120 | /// Returns the error message |
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121 | const std::string& message() const throw() { |
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122 | return _message; |
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123 | } |
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124 | |
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125 | /// \brief Returns the filename |
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126 | /// |
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127 | /// Returns the filename or an empty string if it was not specified. |
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128 | const std::string& file() const throw() { |
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129 | return _file; |
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130 | } |
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131 | |
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132 | /// \brief Returns a short error message |
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133 | /// |
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134 | /// Returns a short error message which contains the message and the |
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135 | /// file name. |
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136 | virtual const char* what() const throw() { |
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137 | try { |
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138 | _what.clear(); |
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139 | std::ostringstream oss; |
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140 | oss << "lemon:IoError" << ": "; |
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141 | oss << _message; |
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142 | if (!_file.empty()) { |
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143 | oss << " ('" << _file << "')"; |
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144 | } |
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145 | _what = oss.str(); |
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146 | } |
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147 | catch (...) {} |
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148 | if (!_what.empty()) return _what.c_str(); |
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149 | else return "lemon:IoError"; |
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150 | } |
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151 | |
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152 | }; |
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153 | |
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154 | /// \brief Format error |
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155 | /// |
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156 | /// This exception is thrown when an input file has wrong |
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157 | /// format or a data representation is not legal. |
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158 | class FormatError : public Exception { |
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159 | protected: |
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160 | std::string _message; |
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161 | std::string _file; |
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162 | int _line; |
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163 | |
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164 | mutable std::string _what; |
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165 | public: |
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166 | |
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167 | /// Copy constructor |
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168 | FormatError(const FormatError &error) throw() : Exception() { |
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169 | message(error._message); |
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170 | file(error._file); |
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171 | line(error._line); |
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172 | } |
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173 | |
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174 | /// Constructor |
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175 | explicit FormatError(const char *message) throw() { |
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176 | FormatError::message(message); |
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177 | _line = 0; |
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178 | } |
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179 | |
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180 | /// Constructor |
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181 | explicit FormatError(const std::string &message) throw() { |
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182 | FormatError::message(message); |
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183 | _line = 0; |
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184 | } |
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185 | |
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186 | /// Constructor |
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187 | explicit FormatError(const char *message, |
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188 | const std::string &file, int line = 0) throw() { |
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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 | explicit FormatError(const std::string &message, |
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196 | const std::string &file, int line = 0) throw() { |
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197 | FormatError::message(message); |
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198 | FormatError::file(file); |
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199 | FormatError::line(line); |
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200 | } |
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201 | |
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202 | /// Virtual destructor |
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203 | virtual ~FormatError() throw() {} |
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204 | |
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205 | /// Set the line number |
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206 | void line(int line) throw() { _line = line; } |
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207 | |
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208 | /// Set the error message |
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209 | void message(const char *message) throw() { |
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210 | try { |
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211 | _message = message; |
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212 | } catch (...) {} |
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213 | } |
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214 | |
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215 | /// Set the error message |
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216 | void message(const std::string& message) throw() { |
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217 | try { |
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218 | _message = message; |
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219 | } catch (...) {} |
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220 | } |
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221 | |
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222 | /// Set the file name |
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223 | void file(const std::string &file) throw() { |
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224 | try { |
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225 | _file = file; |
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226 | } catch (...) {} |
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227 | } |
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228 | |
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229 | /// \brief Returns the line number |
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230 | /// |
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231 | /// Returns the line number or zero if it was not specified. |
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232 | int line() const throw() { return _line; } |
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233 | |
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234 | /// Returns the error message |
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235 | const std::string& message() const throw() { |
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236 | return _message; |
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237 | } |
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238 | |
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239 | /// \brief Returns the filename |
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240 | /// |
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241 | /// Returns the filename or an empty string if it was not specified. |
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242 | const std::string& file() const throw() { |
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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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250 | virtual const char* what() const throw() { |
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251 | try { |
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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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262 | } |
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263 | _what = oss.str(); |
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264 | } |
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265 | catch (...) {} |
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266 | if (!_what.empty()) return _what.c_str(); |
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267 | else return "lemon:FormatError"; |
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268 | } |
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269 | |
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270 | }; |
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271 | |
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272 | /// @} |
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273 | |
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274 | } |
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275 | |
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276 | #endif // LEMON_ERROR_H |
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