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annotate liboctave/util/quit.cc @ 29358:0a5b15007766 stable

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update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2021.
author John W. Eaton <jwe@octave.org>
date Wed, 10 Feb 2021 09:52:15 -0500
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children aef11bb4e6d1
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2002-2021 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if defined (HAVE_CONFIG_H)
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27 # include "config.h"
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28 #endif
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29
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30 #include <cstring>
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31
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32 #include <ostream>
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33 #include <sstream>
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34 #include <new>
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35
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36 #include "quit.h"
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37
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38 sig_atomic_t octave_interrupt_state = 0;
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39
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40 // DEPRECATED in Octave 6.
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41 // This variable should never have been public.
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42 sig_atomic_t octave_exception_state = 0;
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43 // Use this variable internally until the functions that use it can be
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44 // removed.
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45 static sig_atomic_t internal_exception_state;
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46
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47 volatile sig_atomic_t octave_signal_caught = 0;
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48
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49 void (*octave_signal_hook) (void) = nullptr;
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50 void (*octave_interrupt_hook) (void) = nullptr;
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51
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52 // DEPRECATED in Octave 6.
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53 void (*octave_bad_alloc_hook) (void) = nullptr;
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54
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55 // The octave_exception enum values were DEPRECATED in Octave 6.
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56 // Use these values internally until the functions that use them can be
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57 // removed.
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58 enum octave_internal_exception
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59 {
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60 octave_internal_no_exception = 0,
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61 octave_internal_exec_exception = 1,
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62 octave_internal_alloc_exception = 3,
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63 octave_internal_quit_exception = 4
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64 };
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65
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66 namespace octave
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67 {
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68 std::string execution_exception::stack_trace (void) const
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69 {
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70 size_t nframes = m_stack_info.size ();
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71
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72 if (nframes == 0)
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73 return std::string ();
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74
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75 std::ostringstream buf;
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76
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77 buf << "error: called from\n";
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78
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79 for (const auto& frm : m_stack_info)
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80 {
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81 buf << " " << frm.fcn_name ();
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82
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83 int line = frm.line ();
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84
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85 if (line > 0)
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86 {
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87 buf << " at line " << line;
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88
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89 int column = frm.column ();
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90
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91 if (column > 0)
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92 buf << " column " << column;
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93 }
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94
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95 buf << "\n";
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96 }
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97
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98 return buf.str ();
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99 }
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100
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101 void execution_exception::display (std::ostream& os) const
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102 {
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103 if (! m_message.empty ())
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104 {
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105 os << m_err_type << ": " << m_message;
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106
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107 if (m_message.back () != '\n')
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108 {
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109 os << "\n";
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110
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111 std::string st = stack_trace ();
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112
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113 if (! st.empty ())
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114 os << st;
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115 }
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116 }
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117 }
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118 }
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119
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120 void
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121 octave_handle_signal (void)
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122 {
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123 if (octave_signal_hook)
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124 octave_signal_hook ();
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125
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126 if (octave_interrupt_state > 0)
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127 {
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128 octave_interrupt_state = -1;
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129
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130 throw octave::interrupt_exception ();
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131 }
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132 }
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133
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134 // DEPRECATED in Octave 6
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135 void
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136 octave_throw_interrupt_exception (void)
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137 {
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138 if (octave_interrupt_hook)
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139 octave_interrupt_hook ();
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140
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141 throw octave::interrupt_exception ();
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142 }
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143
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144 // DEPRECATED in Octave 6
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145 void
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146 octave_throw_execution_exception (void)
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147 {
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148 // FIXME: would a hook function be useful here?
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149
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150 internal_exception_state = octave_internal_exec_exception;
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151
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152 throw octave::execution_exception ();
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153 }
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154
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155 // DEPRECATED in Octave 6
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156 void
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157 octave_throw_bad_alloc (void)
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158 {
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159 internal_exception_state = octave_internal_alloc_exception;
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160
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161 throw std::bad_alloc ();
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162 }
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163
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164 // DEPRECATED in Octave 6
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165 void
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166 octave_rethrow_exception (void)
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167 {
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168 if (octave_interrupt_state)
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169 {
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170 octave_interrupt_state = -1;
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171
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172 throw octave::interrupt_exception ();
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173 }
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174 else
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175 {
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176 switch (internal_exception_state)
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177 {
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178 case octave_internal_exec_exception:
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179 throw octave::execution_exception ();
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180 break;
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181
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182 case octave_internal_alloc_exception:
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183 throw std::bad_alloc ();
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184 break;
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185
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186 default:
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187 break;
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188 }
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189 }
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190 }