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1
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1 /* |
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2 |
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2847
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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5307
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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240
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24 #ifdef HAVE_CONFIG_H |
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1192
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25 #include <config.h> |
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1
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26 #endif |
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27 |
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1343
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28 #include <cstdarg> |
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1633
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29 #include <cstring> |
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1343
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30 |
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1728
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31 #include <string> |
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32 |
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4051
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33 #include "lo-sstream.h" |
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34 |
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1352
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35 #include "defun.h" |
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1
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36 #include "error.h" |
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3707
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37 #include "input.h" |
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1742
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38 #include "pager.h" |
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1352
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39 #include "oct-obj.h" |
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5567
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40 #include "oct-map.h" |
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1352
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41 #include "utils.h" |
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2370
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42 #include "ov.h" |
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3707
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43 #include "ov-usr-fcn.h" |
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44 #include "pt-pr-code.h" |
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45 #include "pt-stmt.h" |
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46 #include "toplev.h" |
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47 #include "unwind-prot.h" |
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2370
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48 #include "variables.h" |
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1
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49 |
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2174
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50 // TRUE means that Octave will try to beep obnoxiously before printing |
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51 // error messages. |
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52 static bool Vbeep_on_error; |
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53 |
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3707
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54 // TRUE means that Octave will try to enter the debugger when an error |
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55 // is encountered. This will also inhibit printing of the normal |
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56 // traceback message (you will only see the top-level error message). |
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57 static bool Vdebug_on_error; |
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58 |
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59 // TRUE means that Octave will try to enter the debugger when a warning |
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60 // is encountered. |
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61 static bool Vdebug_on_warning; |
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62 |
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5567
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63 // TRUE means that Octave will try to display a stack trace when a |
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64 // warning is encountered. |
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65 static bool Vbacktrace_on_warning = false; |
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66 |
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67 // TRUE means that Octave will print a verbose warning. Currently unused. |
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68 static bool Vverbose_warning; |
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69 |
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5582
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70 // TRUE means that Octave will print no warnings, but lastwarn will be |
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71 //updated |
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72 static bool Vquiet_warning = false; |
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73 |
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5567
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74 // A structure containing (most of) the current state of warnings. |
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75 static Octave_map warning_options; |
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76 |
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3935
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77 // The text of the last error message. |
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78 static std::string Vlast_error_message; |
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79 |
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3934
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80 // The text of the last warning message. |
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81 static std::string Vlast_warning_message; |
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82 |
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5567
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83 // The last warning message id. |
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84 static std::string Vlast_warning_id; |
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3934
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85 |
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5567
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86 // The last error message id. |
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87 static std::string Vlast_error_id; |
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3934
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88 |
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143
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89 // Current error state. |
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3935
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90 // |
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91 // Valid values: |
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92 // |
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93 // -2: an error has occurred, but don't print any messages. |
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94 // -1: an error has occurred, we are printing a traceback |
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95 // 0: no error |
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96 // 1: an error has occurred |
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97 // |
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672
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98 int error_state = 0; |
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99 |
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3489
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100 // Current warning state. |
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3935
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101 // |
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102 // Valid values: |
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103 // |
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104 // 0: no warning |
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105 // 1: a warning has occurred |
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106 // |
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3489
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107 int warning_state = 0; |
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108 |
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1489
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109 // Tell the error handler whether to print messages, or just store |
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110 // them for later. Used for handling errors in eval() and |
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111 // the `unwind_protect' statement. |
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4699
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112 int buffer_error_messages = 0; |
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1489
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113 |
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3815
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114 // TRUE means error messages are turned off. |
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115 bool discard_error_messages = false; |
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116 |
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4452
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117 // TRUE means warning messages are turned off. |
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118 bool discard_warning_messages = false; |
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119 |
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3811
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120 // The message buffer. |
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4051
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121 static OSSTREAM *error_message_buffer = 0; |
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143
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122 |
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4318
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123 void |
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124 reset_error_handler (void) |
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125 { |
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126 error_state = 0; |
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127 warning_state = 0; |
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4699
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128 buffer_error_messages = 0; |
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4318
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129 discard_error_messages = false; |
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130 } |
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131 |
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5567
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132 static void |
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133 init_warning_options (const std::string& state = "on") |
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134 { |
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135 warning_options.clear (); |
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136 |
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137 warning_options.assign ("identifier", "all"); |
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138 warning_options.assign ("state", state); |
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139 } |
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140 |
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3491
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141 // Warning messages are never buffered. |
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142 |
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143 static void |
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5567
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144 vwarning (const char *name, const char *id, const char *fmt, va_list args) |
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3491
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145 { |
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4452
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146 if (discard_warning_messages) |
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147 return; |
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148 |
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3491
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149 flush_octave_stdout (); |
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150 |
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4051
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151 OSSTREAM output_buf; |
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3491
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152 |
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153 if (name) |
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3761
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154 output_buf << name << ": "; |
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155 |
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156 octave_vformat (output_buf, fmt, args); |
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157 |
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4051
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158 output_buf << std::endl << OSSTREAM_ENDS; |
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3491
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159 |
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3935
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160 // XXX FIXME XXX -- we really want to capture the message before it |
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161 // has all the formatting goop attached to it. We probably also |
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162 // want just the message, not the traceback information. |
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163 |
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4051
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164 std::string msg_string = OSSTREAM_STR (output_buf); |
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3761
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165 |
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4051
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166 OSSTREAM_FREEZE (output_buf); |
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3934
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167 |
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3935
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168 if (! warning_state) |
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169 { |
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170 // This is the first warning in a possible series. |
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171 |
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172 Vlast_warning_id = id; |
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3935
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173 Vlast_warning_message = msg_string; |
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174 } |
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3934
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175 |
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5582
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176 if (! Vquiet_warning) |
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177 { |
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178 octave_diary << msg_string; |
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3935
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179 |
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5582
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180 std::cerr << msg_string; |
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181 } |
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3491
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182 } |
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183 |
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1
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184 static void |
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4732
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185 verror (bool save_last_error, std::ostream& os, |
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5567
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186 const char *name, const char *id, const char *fmt, va_list args) |
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1
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187 { |
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3815
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188 if (discard_error_messages) |
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189 return; |
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190 |
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3585
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191 if (! buffer_error_messages) |
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192 flush_octave_stdout (); |
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914
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193 |
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2174
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194 bool to_beep_or_not_to_beep_p = Vbeep_on_error && ! error_state; |
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1423
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195 |
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4051
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196 OSSTREAM output_buf; |
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1
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197 |
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2174
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198 if (to_beep_or_not_to_beep_p) |
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1423
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199 output_buf << "\a"; |
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3620
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200 |
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599
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201 if (name) |
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202 output_buf << name << ": "; |
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3620
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203 |
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204 octave_vformat (output_buf, fmt, args); |
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205 |
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4051
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206 output_buf << std::endl << OSSTREAM_ENDS; |
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207 |
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3935
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208 // XXX FIXME XXX -- we really want to capture the message before it |
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209 // has all the formatting goop attached to it. We probably also |
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210 // want just the message, not the traceback information. |
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211 |
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4051
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212 std::string msg_string = OSSTREAM_STR (output_buf); |
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3935
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213 |
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4051
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214 OSSTREAM_FREEZE (output_buf); |
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3935
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215 |
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4731
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216 if (! error_state && save_last_error) |
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3935
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217 { |
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218 // This is the first error in a possible series. |
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219 |
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220 Vlast_error_id = id; |
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221 Vlast_error_message = msg_string; |
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222 } |
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223 |
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1489
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224 if (buffer_error_messages) |
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225 { |
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3941
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226 std::string tmp = msg_string; |
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1489
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227 |
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228 if (! error_message_buffer) |
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229 { |
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230 error_message_buffer = new OSSTREAM; |
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231 |
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232 // XXX FIXME XXX -- this is ugly, but it prevents |
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233 // |
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4699
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234 // eval ("error (\"msg\")", "error (lasterr ())"); |
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1489
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235 // |
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236 // from printing `error: ' twice. Assumes that the NAME we |
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237 // have been given doesn't contain `:'. |
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238 |
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3935
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239 size_t pos = msg_string.find (':'); |
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3162
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240 |
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3935
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241 if (pos != NPOS && pos < Vlast_error_message.length () - 2) |
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242 tmp = msg_string.substr (pos+2); |
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1489
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243 } |
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244 |
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3935
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245 *error_message_buffer << tmp; |
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246 } |
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247 else |
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248 { |
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3935
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249 octave_diary << msg_string; |
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4732
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250 os << msg_string; |
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1489
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251 } |
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1
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252 } |
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253 |
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1266
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254 // Note that we don't actually print any message if the error string |
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255 // is just "" or "\n". This allows error ("") and error ("\n") to |
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256 // just set the error state. |
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257 |
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1005
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258 static void |
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5567
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259 error_1 (std::ostream& os, const char *name, const char *id, |
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260 const char *fmt, va_list args) |
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1005
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261 { |
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262 if (error_state != -2) |
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263 { |
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1489
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264 if (fmt) |
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1005
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265 { |
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1489
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266 if (*fmt) |
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1005
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267 { |
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1489
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268 int len = strlen (fmt); |
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269 if (fmt[len - 1] == '\n') |
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1266
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270 { |
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1489
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271 if (len > 1) |
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1266
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272 { |
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1489
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273 char *tmp_fmt = strsave (fmt); |
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274 tmp_fmt[len - 1] = '\0'; |
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5567
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275 verror (true, os, name, id, tmp_fmt, args); |
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1489
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276 delete [] tmp_fmt; |
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277 } |
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1423
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278 |
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1489
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279 error_state = -2; |
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1266
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280 } |
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1489
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281 else |
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5567
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282 verror (true, os, name, id, fmt, args); |
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1005
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283 } |
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284 } |
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1489
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285 else |
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286 panic ("error_1: invalid format"); |
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1423
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287 |
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288 if (! error_state) |
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289 error_state = 1; |
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1005
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290 } |
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291 } |
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292 |
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1
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293 void |
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294 message (const char *name, const char *fmt, ...) |
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295 { |
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296 va_list args; |
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297 va_start (args, fmt); |
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5567
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298 verror (false, std::cerr, name, "", fmt, args); |
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1
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299 va_end (args); |
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300 } |
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301 |
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302 void |
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5567
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303 message_with_id (const char *name, const char *id, const char *fmt, ...) |
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304 { |
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305 va_list args; |
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306 va_start (args, fmt); |
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307 verror (false, std::cerr, name, id, fmt, args); |
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308 va_end (args); |
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309 } |
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310 |
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311 void |
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312 usage_1 (const char *id, const char *fmt, va_list args) |
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313 { |
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314 verror (true, std::cerr, "usage", id, fmt, args); |
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315 error_state = -1; |
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316 } |
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317 |
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318 void |
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1
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319 usage (const char *fmt, ...) |
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320 { |
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321 va_list args; |
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322 va_start (args, fmt); |
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5567
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323 usage_1 ("", fmt, args); |
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324 va_end (args); |
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325 } |
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326 |
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327 void |
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328 usage_with_id (const char *id, const char *fmt, ...) |
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329 { |
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330 va_list args; |
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331 va_start (args, fmt); |
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332 usage_1 (id, fmt, args); |
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1
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333 va_end (args); |
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334 } |
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335 |
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3707
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336 static void |
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3719
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337 pr_where_2 (const char *fmt, va_list args) |
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338 { |
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339 if (fmt) |
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340 { |
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341 if (*fmt) |
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342 { |
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343 int len = strlen (fmt); |
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344 if (fmt[len - 1] == '\n') |
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345 { |
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346 if (len > 1) |
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347 { |
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348 char *tmp_fmt = strsave (fmt); |
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349 tmp_fmt[len - 1] = '\0'; |
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5567
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350 verror (false, std::cerr, 0, "", tmp_fmt, args); |
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3719
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351 delete [] tmp_fmt; |
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352 } |
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353 } |
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354 else |
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5567
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355 verror (false, std::cerr, 0, "", fmt, args); |
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3719
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356 } |
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357 } |
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358 else |
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359 panic ("pr_where_2: invalid format"); |
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360 } |
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361 |
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362 static void |
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3707
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363 pr_where_1 (const char *fmt, ...) |
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364 { |
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365 va_list args; |
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366 va_start (args, fmt); |
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3719
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367 pr_where_2 (fmt, args); |
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3707
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368 va_end (args); |
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369 } |
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370 |
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371 static void |
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4719
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372 pr_where (const char *name, bool print_code = true) |
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3707
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373 { |
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374 if (curr_statement) |
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375 { |
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4976
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376 std::string nm; |
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3707
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377 |
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4976
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378 int l = -1; |
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379 int c = -1; |
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380 |
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381 octave_function *fcn = curr_function; |
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382 |
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383 if (fcn) |
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3708
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384 { |
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4976
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385 nm = fcn->name (); |
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386 |
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387 if (nm == "error" || nm == "warning") |
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388 fcn = curr_caller_function; |
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389 |
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390 if (fcn) |
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391 { |
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392 nm = fcn->fcn_file_name (); |
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3708
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393 |
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4976
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394 if (nm.empty ()) |
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395 nm = fcn->name (); |
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396 |
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397 if (curr_statement) |
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398 { |
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399 l = curr_statement->line (); |
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400 c = curr_statement->column (); |
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401 } |
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402 } |
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3708
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403 } |
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3707
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404 |
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4976
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405 if (nm.empty ()) |
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406 { |
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407 if (l > 0 && c > 0) |
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408 pr_where_1 ("%s: near line %d, column %d:", name, l, c); |
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409 } |
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3708
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410 else |
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4976
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411 { |
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412 if (l > 0 && c > 0) |
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413 pr_where_1 ("%s: in %s near line %d, column %d:", |
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414 name, nm.c_str (), l, c); |
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415 else |
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416 pr_where_1 ("%s: in %s", name, nm.c_str ()); |
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417 } |
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3707
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418 |
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4719
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419 if (print_code) |
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420 { |
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421 // XXX FIXME XXX -- Note that the column number is probably |
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422 // not going to mean much here since the code is being |
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423 // reproduced from the parse tree, and we are only showing |
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424 // one statement even if there were multiple statements on |
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425 // the original source line. |
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3707
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426 |
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4719
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427 OSSTREAM output_buf; |
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3708
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428 |
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4719
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429 output_buf << std::endl; |
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3707
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430 |
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4719
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431 tree_print_code tpc (output_buf, ">>> "); |
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432 |
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433 curr_statement->accept (tpc); |
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3707
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434 |
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4719
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435 output_buf << std::endl << OSSTREAM_ENDS; |
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3707
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436 |
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4719
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437 pr_where_1 ("%s", OSSTREAM_C_STR (output_buf)); |
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3707
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438 |
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4719
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439 OSSTREAM_FREEZE (output_buf); |
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440 } |
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3707
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441 } |
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442 } |
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443 |
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5567
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444 static int |
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445 check_state (const std::string& state) |
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446 { |
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447 // -1: not found |
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448 // 0: found, "off" |
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449 // 1: found, "on" |
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450 // 2: found, "error" |
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451 |
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452 if (state == "off") |
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453 return 0; |
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454 else if (state == "on") |
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455 return 1; |
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456 else if (state == "error") |
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457 return 2; |
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458 else |
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459 return -1; |
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460 } |
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461 |
|
|
462 // For given warning ID, return 0 if warnings are disabled, 1 if |
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463 // enabled, and 2 if this ID should be an error instead of a warning. |
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464 |
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465 static int |
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466 warning_enabled (const std::string& id) |
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1
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467 { |
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5567
|
468 int retval = 0; |
|
|
469 |
|
|
470 int all_state = -1; |
|
|
471 int id_state = -1; |
|
|
472 |
|
|
473 octave_idx_type nel = warning_options.numel (); |
|
|
474 |
|
|
475 if (nel > 0) |
|
|
476 { |
|
|
477 Cell identifier = warning_options.contents ("identifier"); |
|
|
478 Cell state = warning_options.contents ("state"); |
|
|
479 |
|
|
480 bool all_found = false; |
|
|
481 bool id_found = false; |
|
|
482 |
|
|
483 for (octave_idx_type i = 0; i < nel; i++) |
|
|
484 { |
|
|
485 octave_value ov = identifier(i); |
|
|
486 std::string ovs = ov.string_value (); |
|
|
487 |
|
|
488 if (! all_found && ovs == "all") |
|
|
489 { |
|
|
490 all_state = check_state (state(i).string_value ()); |
|
|
491 |
|
|
492 if (all_state >= 0) |
|
|
493 all_found = true; |
|
|
494 } |
|
|
495 |
|
|
496 if (! id_found && ovs == id) |
|
|
497 { |
|
|
498 id_state = check_state (state(i).string_value ()); |
|
|
499 |
|
|
500 if (id_state >= 0) |
|
|
501 id_found = true; |
|
|
502 } |
|
|
503 |
|
|
504 if (all_found && id_found) |
|
|
505 break; |
|
|
506 } |
|
|
507 |
|
|
508 } |
|
|
509 |
|
|
510 if (all_state == -1) |
|
|
511 panic_impossible (); |
|
|
512 |
|
|
513 if (all_state == 0) |
|
|
514 { |
|
|
515 if (id_state >= 0) |
|
|
516 retval = id_state; |
|
|
517 } |
|
|
518 else if (all_state == 1) |
|
|
519 { |
|
|
520 if (id_state == 0 || id_state == 2) |
|
|
521 retval = id_state; |
|
|
522 else |
|
|
523 retval = all_state; |
|
|
524 } |
|
|
525 else if (all_state == 2) |
|
|
526 retval = 2; |
|
|
527 |
|
|
528 return retval; |
|
|
529 } |
|
|
530 |
|
|
531 static void |
|
|
532 warning_1 (const char *id, const char *fmt, va_list args) |
|
|
533 { |
|
|
534 int warn_opt = warning_enabled (id); |
|
|
535 |
|
|
536 if (warn_opt == 2) |
|
|
537 { |
|
|
538 // Handle this warning as an error. |
|
|
539 |
|
|
540 error (id, fmt, args); |
|
|
541 } |
|
|
542 else if (warn_opt == 1) |
|
3934
|
543 { |
|
4014
|
544 if (curr_sym_tab != top_level_sym_tab |
|
5567
|
545 && Vbacktrace_on_warning |
|
4452
|
546 && ! warning_state |
|
|
547 && ! discard_warning_messages) |
|
4719
|
548 pr_where ("warning", false); |
|
3986
|
549 |
|
5567
|
550 vwarning ("warning", id, fmt, args); |
|
3707
|
551 |
|
3935
|
552 warning_state = 1; |
|
|
553 |
|
3934
|
554 if ((interactive || forced_interactive) |
|
|
555 && Vdebug_on_warning && curr_function) |
|
|
556 { |
|
|
557 unwind_protect_bool (Vdebug_on_warning); |
|
|
558 Vdebug_on_warning = false; |
|
3707
|
559 |
|
3934
|
560 do_keyboard (octave_value_list ()); |
|
3707
|
561 |
|
3934
|
562 unwind_protect::run (); |
|
|
563 } |
|
3707
|
564 } |
|
1
|
565 } |
|
|
566 |
|
|
567 void |
|
5567
|
568 warning (const char *fmt, ...) |
|
|
569 { |
|
|
570 va_list args; |
|
|
571 va_start (args, fmt); |
|
|
572 warning_1 ("", fmt, args); |
|
|
573 va_end (args); |
|
|
574 } |
|
|
575 |
|
|
576 void |
|
|
577 warning_with_id (const char *id, const char *fmt, ...) |
|
|
578 { |
|
|
579 va_list args; |
|
|
580 va_start (args, fmt); |
|
|
581 warning_1 (id, fmt, args); |
|
|
582 va_end (args); |
|
|
583 } |
|
|
584 |
|
|
585 static void |
|
|
586 error_2 (const char *id, const char *fmt, va_list args) |
|
1
|
587 { |
|
3707
|
588 int init_state = error_state; |
|
|
589 |
|
5567
|
590 error_1 (std::cerr, "error", id, fmt, args); |
|
3707
|
591 |
|
|
592 if ((interactive || forced_interactive) |
|
|
593 && Vdebug_on_error && init_state == 0 && curr_function) |
|
|
594 { |
|
|
595 unwind_protect_bool (Vdebug_on_error); |
|
|
596 Vdebug_on_error = false; |
|
|
597 |
|
3708
|
598 pr_where ("error"); |
|
3707
|
599 |
|
|
600 error_state = 0; |
|
|
601 |
|
|
602 do_keyboard (octave_value_list ()); |
|
|
603 |
|
|
604 unwind_protect::run (); |
|
|
605 } |
|
1005
|
606 } |
|
436
|
607 |
|
1005
|
608 void |
|
5567
|
609 error (const char *fmt, ...) |
|
|
610 { |
|
|
611 va_list args; |
|
|
612 va_start (args, fmt); |
|
|
613 error_2 ("", fmt, args); |
|
|
614 va_end (args); |
|
|
615 } |
|
|
616 |
|
|
617 void |
|
|
618 error_with_id (const char *id, const char *fmt, ...) |
|
|
619 { |
|
|
620 va_list args; |
|
|
621 va_start (args, fmt); |
|
|
622 error_2 (id, fmt, args); |
|
|
623 va_end (args); |
|
|
624 } |
|
|
625 |
|
|
626 void |
|
1005
|
627 parse_error (const char *fmt, ...) |
|
|
628 { |
|
|
629 va_list args; |
|
|
630 va_start (args, fmt); |
|
5567
|
631 error_1 (std::cerr, 0, "", fmt, args); |
|
|
632 va_end (args); |
|
|
633 } |
|
|
634 |
|
|
635 void |
|
|
636 parse_error_with_id (const char *id, const char *fmt, ...) |
|
|
637 { |
|
|
638 va_list args; |
|
|
639 va_start (args, fmt); |
|
|
640 error_1 (std::cerr, 0, id, fmt, args); |
|
1
|
641 va_end (args); |
|
|
642 } |
|
|
643 |
|
189
|
644 void |
|
1
|
645 panic (const char *fmt, ...) |
|
|
646 { |
|
|
647 va_list args; |
|
|
648 va_start (args, fmt); |
|
4699
|
649 buffer_error_messages = 0; |
|
3815
|
650 discard_error_messages = false; |
|
5567
|
651 verror (false, std::cerr, "panic", "", fmt, args); |
|
1
|
652 va_end (args); |
|
|
653 abort (); |
|
|
654 } |
|
|
655 |
|
4732
|
656 static void |
|
|
657 defun_usage_message_1 (const char *fmt, ...) |
|
|
658 { |
|
|
659 va_list args; |
|
|
660 va_start (args, fmt); |
|
5567
|
661 error_1 (octave_stdout, 0, "", fmt, args); |
|
4732
|
662 va_end (args); |
|
|
663 } |
|
|
664 |
|
|
665 void |
|
|
666 defun_usage_message (const std::string& msg) |
|
|
667 { |
|
|
668 defun_usage_message_1 ("%s", msg.c_str ()); |
|
|
669 } |
|
|
670 |
|
5567
|
671 typedef void (*error_fun)(const char *, const char *, ...); |
|
1489
|
672 |
|
2086
|
673 extern octave_value_list Fsprintf (const octave_value_list&, int); |
|
1489
|
674 |
|
3934
|
675 static std::string |
|
5567
|
676 handle_message (error_fun f, const char *id, const char *msg, |
|
|
677 const octave_value_list& args) |
|
528
|
678 { |
|
3934
|
679 std::string retval; |
|
528
|
680 |
|
3523
|
681 std::string tstr; |
|
1728
|
682 |
|
528
|
683 int nargin = args.length (); |
|
|
684 |
|
2745
|
685 if (nargin > 0) |
|
528
|
686 { |
|
3066
|
687 octave_value arg; |
|
|
688 |
|
|
689 if (nargin > 1) |
|
|
690 { |
|
|
691 octave_value_list tmp = Fsprintf (args, 1); |
|
|
692 arg = tmp(0); |
|
|
693 } |
|
|
694 else |
|
|
695 arg = args(0); |
|
2745
|
696 |
|
|
697 if (arg.is_defined ()) |
|
528
|
698 { |
|
2745
|
699 if (arg.is_string ()) |
|
|
700 { |
|
|
701 tstr = arg.string_value (); |
|
|
702 msg = tstr.c_str (); |
|
|
703 |
|
|
704 if (! msg) |
|
|
705 return retval; |
|
|
706 } |
|
|
707 else if (arg.is_empty ()) |
|
528
|
708 return retval; |
|
|
709 } |
|
|
710 } |
|
|
711 |
|
1489
|
712 // Ugh. |
|
|
713 |
|
|
714 int len = strlen (msg); |
|
|
715 if (msg[len - 1] == '\n') |
|
|
716 { |
|
|
717 if (len > 1) |
|
|
718 { |
|
|
719 char *tmp_msg = strsave (msg); |
|
|
720 tmp_msg[len - 1] = '\0'; |
|
5567
|
721 f (id, "%s\n", tmp_msg); |
|
3934
|
722 retval = tmp_msg; |
|
1489
|
723 delete [] tmp_msg; |
|
|
724 } |
|
|
725 } |
|
|
726 else |
|
3934
|
727 { |
|
5567
|
728 f (id, "%s", msg); |
|
3934
|
729 retval = msg; |
|
|
730 } |
|
528
|
731 |
|
|
732 return retval; |
|
|
733 } |
|
|
734 |
|
1957
|
735 DEFUN (error, args, , |
|
3373
|
736 "-*- texinfo -*-\n\ |
|
|
737 @deftypefn {Built-in Function} {} error (@var{template}, @dots{})\n\ |
|
|
738 The @code{error} function formats the optional arguments under the\n\ |
|
|
739 control of the template string @var{template} using the same rules as\n\ |
|
|
740 the @code{printf} family of functions (@pxref{Formatted Output}).\n\ |
|
|
741 The resulting message is prefixed by the string @samp{error: } and\n\ |
|
|
742 printed on the @code{stderr} stream.\n\ |
|
|
743 \n\ |
|
|
744 Calling @code{error} also sets Octave's internal error state such that\n\ |
|
|
745 control will return to the top level without evaluating any more\n\ |
|
|
746 commands. This is useful for aborting from functions or scripts.\n\ |
|
897
|
747 \n\ |
|
3373
|
748 If the error message does not end with a new line character, Octave will\n\ |
|
|
749 print a traceback of all the function calls leading to the error. For\n\ |
|
|
750 example, given the following function definitions:\n\ |
|
|
751 \n\ |
|
|
752 @example\n\ |
|
|
753 @group\n\ |
|
|
754 function f () g () end\n\ |
|
|
755 function g () h () end\n\ |
|
|
756 function h () nargin == 1 || error (\"nargin != 1\"); end\n\ |
|
|
757 @end group\n\ |
|
|
758 @end example\n\ |
|
1489
|
759 \n\ |
|
3373
|
760 @noindent\n\ |
|
|
761 calling the function @code{f} will result in a list of messages that\n\ |
|
|
762 can help you to quickly locate the exact location of the error:\n\ |
|
1489
|
763 \n\ |
|
3373
|
764 @example\n\ |
|
|
765 @group\n\ |
|
|
766 f ()\n\ |
|
|
767 error: nargin != 1\n\ |
|
|
768 error: evaluating index expression near line 1, column 30\n\ |
|
|
769 error: evaluating binary operator `||' near line 1, column 27\n\ |
|
|
770 error: called from `h'\n\ |
|
|
771 error: called from `g'\n\ |
|
|
772 error: called from `f'\n\ |
|
|
773 @end group\n\ |
|
|
774 @end example\n\ |
|
|
775 \n\ |
|
|
776 If the error message ends in a new line character, Octave will print the\n\ |
|
|
777 message but will not display any traceback messages as it returns\n\ |
|
|
778 control to the top level. For example, modifying the error message\n\ |
|
|
779 in the previous example to end in a new line causes Octave to only print\n\ |
|
|
780 a single message:\n\ |
|
|
781 \n\ |
|
|
782 @example\n\ |
|
|
783 @group\n\ |
|
|
784 function h () nargin == 1 || error (\"nargin != 1\\n\"); end\n\ |
|
|
785 f ()\n\ |
|
|
786 error: nargin != 1\n\ |
|
|
787 @end group\n\ |
|
|
788 @end example\n\ |
|
|
789 @end deftypefn") |
|
897
|
790 { |
|
5567
|
791 // XXX FIXME XXX -- need to extract and pass message id to |
|
|
792 // handle_message. |
|
|
793 |
|
3934
|
794 octave_value_list retval; |
|
5567
|
795 handle_message (error_with_id, "", "unspecified error", args); |
|
3934
|
796 return retval; |
|
1489
|
797 } |
|
897
|
798 |
|
5567
|
799 DEFCMD (warning, args, nargout, |
|
3373
|
800 "-*- texinfo -*-\n\ |
|
|
801 @deftypefn {Built-in Function} {} warning (@var{msg})\n\ |
|
|
802 Print a warning message @var{msg} prefixed by the string @samp{warning: }. \n\ |
|
|
803 After printing the warning message, Octave will continue to execute\n\ |
|
3600
|
804 commands. You should use this function when you want to notify the user\n\ |
|
|
805 of an unusual condition, but only when it makes sense for your program\n\ |
|
|
806 to go on.\n\ |
|
3373
|
807 @end deftypefn") |
|
1489
|
808 { |
|
5567
|
809 octave_value retval; |
|
3934
|
810 |
|
5567
|
811 int nargin = args.length (); |
|
|
812 int argc = nargin + 1; |
|
3934
|
813 |
|
3935
|
814 bool done = false; |
|
3934
|
815 |
|
5567
|
816 if (argc > 1 && args.all_strings_p ()) |
|
3935
|
817 { |
|
|
818 string_vector argv = args.make_argv ("warning"); |
|
|
819 |
|
|
820 if (! error_state) |
|
3934
|
821 { |
|
5567
|
822 std::string arg1 = argv(1); |
|
|
823 std::string arg2 = "all"; |
|
|
824 |
|
|
825 if (argc == 3) |
|
|
826 arg2 = argv(2); |
|
|
827 |
|
|
828 if (arg1 == "on" || arg1 == "off" || arg1 == "error") |
|
3934
|
829 { |
|
5567
|
830 Octave_map old_warning_options = warning_options; |
|
|
831 |
|
|
832 if (arg2 == "all") |
|
|
833 { |
|
|
834 Octave_map tmp; |
|
3934
|
835 |
|
5567
|
836 tmp.assign ("identifier", arg2); |
|
|
837 tmp.assign ("state", arg1); |
|
|
838 |
|
|
839 warning_options = tmp; |
|
|
840 |
|
3935
|
841 done = true; |
|
|
842 } |
|
5567
|
843 else if (arg2 == "backtrace") |
|
|
844 { |
|
|
845 if (arg1 != "error") |
|
|
846 { |
|
|
847 Vbacktrace_on_warning = (arg1 == "on"); |
|
|
848 done = true; |
|
|
849 } |
|
|
850 } |
|
|
851 else if (arg2 == "debug") |
|
|
852 { |
|
|
853 if (arg1 != "error") |
|
|
854 { |
|
|
855 bind_builtin_variable ("debug_on_warning", arg1 == "on"); |
|
|
856 done = true; |
|
|
857 } |
|
|
858 } |
|
|
859 else if (arg2 == "verbose") |
|
|
860 { |
|
|
861 if (arg1 != "error") |
|
|
862 { |
|
|
863 Vverbose_warning = (arg1 == "on"); |
|
|
864 done = true; |
|
|
865 } |
|
|
866 } |
|
5582
|
867 else if (arg2 == "quiet") |
|
|
868 { |
|
|
869 if (arg1 != "error") |
|
|
870 { |
|
|
871 Vquiet_warning = (arg1 == "on"); |
|
|
872 done = true; |
|
|
873 } |
|
|
874 } |
|
5567
|
875 else |
|
3935
|
876 { |
|
5567
|
877 if (arg2 == "last") |
|
|
878 arg2 = Vlast_warning_id; |
|
|
879 |
|
|
880 if (arg2 == "all") |
|
|
881 init_warning_options (arg1); |
|
|
882 else |
|
|
883 { |
|
|
884 Cell ident = warning_options.contents ("identifier"); |
|
|
885 Cell state = warning_options.contents ("state"); |
|
|
886 |
|
|
887 octave_idx_type nel = ident.numel (); |
|
|
888 |
|
|
889 bool found = false; |
|
|
890 |
|
|
891 for (octave_idx_type i = 0; i < nel; i++) |
|
|
892 { |
|
|
893 if (ident(i).string_value () == arg2) |
|
|
894 { |
|
|
895 // XXX FIXME XXX -- if state for "all" is |
|
|
896 // same as arg1, we can simply remove the |
|
|
897 // item from the list. |
|
|
898 |
|
|
899 state(i) = arg1; |
|
|
900 warning_options.assign ("state", state); |
|
|
901 found = true; |
|
|
902 break; |
|
|
903 } |
|
|
904 } |
|
|
905 |
|
|
906 if (! found) |
|
|
907 { |
|
|
908 // XXX FIXME XXX -- if state for "all" is |
|
|
909 // same as arg1, we don't need to do anything. |
|
|
910 |
|
|
911 ident.resize (dim_vector (1, nel+1)); |
|
|
912 state.resize (dim_vector (1, nel+1)); |
|
|
913 |
|
|
914 ident(nel) = arg2; |
|
|
915 state(nel) = arg1; |
|
|
916 |
|
|
917 warning_options.clear (); |
|
|
918 |
|
|
919 warning_options.assign ("identifier", ident); |
|
|
920 warning_options.assign ("state", state); |
|
|
921 } |
|
|
922 } |
|
|
923 |
|
3935
|
924 done = true; |
|
|
925 } |
|
5567
|
926 |
|
|
927 if (done && nargout > 0) |
|
|
928 retval = warning_options; |
|
|
929 } |
|
|
930 else if (arg1 == "query") |
|
|
931 { |
|
|
932 if (arg2 == "all") |
|
|
933 retval = warning_options; |
|
|
934 else if (arg2 == "backtrace" || arg2 == "debug" |
|
5582
|
935 || arg2 == "verbose" || arg2 == "quiet") |
|
5567
|
936 { |
|
|
937 Octave_map tmp; |
|
|
938 tmp.assign ("identifier", arg2); |
|
|
939 if (arg2 == "backtrace") |
|
|
940 tmp.assign ("state", Vbacktrace_on_warning ? "on" : "off"); |
|
|
941 else if (arg2 == "debug") |
|
|
942 tmp.assign ("state", Vdebug_on_warning ? "on" : "off"); |
|
5582
|
943 else if (arg2 == "verbose") |
|
|
944 tmp.assign ("state", Vverbose_warning ? "on" : "off"); |
|
5567
|
945 else |
|
5582
|
946 tmp.assign ("state", Vquiet_warning ? "on" : "off"); |
|
|
947 |
|
|
948 retval = tmp; |
|
5567
|
949 } |
|
|
950 else |
|
3935
|
951 { |
|
5567
|
952 if (arg2 == "last") |
|
|
953 arg2 = Vlast_warning_id; |
|
|
954 |
|
|
955 Cell ident = warning_options.contents ("identifier"); |
|
|
956 Cell state = warning_options.contents ("state"); |
|
|
957 |
|
|
958 octave_idx_type nel = ident.numel (); |
|
|
959 |
|
|
960 bool found = false; |
|
|
961 |
|
|
962 std::string val; |
|
|
963 |
|
|
964 for (octave_idx_type i = 0; i < nel; i++) |
|
|
965 { |
|
|
966 if (ident(i).string_value () == arg2) |
|
|
967 { |
|
|
968 val = state(i).string_value (); |
|
|
969 found = true; |
|
|
970 break; |
|
|
971 } |
|
|
972 } |
|
|
973 |
|
|
974 if (found) |
|
|
975 { |
|
|
976 Octave_map tmp; |
|
|
977 |
|
|
978 tmp.assign ("identifier", arg2); |
|
|
979 tmp.assign ("state", val); |
|
|
980 |
|
|
981 retval = tmp; |
|
|
982 } |
|
|
983 else |
|
|
984 error ("warning: invalid warning tag `%s'", arg2.c_str ()); |
|
3935
|
985 } |
|
5567
|
986 |
|
|
987 done = true; |
|
3935
|
988 } |
|
3934
|
989 } |
|
|
990 } |
|
5567
|
991 else if (argc == 1) |
|
|
992 { |
|
|
993 retval = warning_options; |
|
3934
|
994 |
|
5567
|
995 done = true; |
|
|
996 } |
|
|
997 else if (argc == 2) |
|
|
998 { |
|
|
999 octave_value arg = args(0); |
|
|
1000 |
|
|
1001 Octave_map old_warning_options = warning_options; |
|
|
1002 |
|
|
1003 if (arg.is_map ()) |
|
|
1004 { |
|
|
1005 Octave_map m = arg.map_value (); |
|
|
1006 |
|
|
1007 if (m.contains ("identifier") && m.contains ("state")) |
|
|
1008 warning ("warning: setting state with structure not implemented"); |
|
|
1009 else |
|
|
1010 error ("warning: expecting structure with fields `identifier' and `state'"); |
|
|
1011 |
|
|
1012 done = true; |
|
|
1013 |
|
|
1014 if (nargout > 0) |
|
|
1015 retval = old_warning_options; |
|
|
1016 } |
|
|
1017 } |
|
|
1018 |
|
|
1019 if (! (error_state || done)) |
|
3935
|
1020 { |
|
5567
|
1021 octave_value_list nargs = args; |
|
|
1022 |
|
|
1023 std::string id; |
|
|
1024 |
|
|
1025 if (nargin > 1) |
|
|
1026 { |
|
|
1027 std::string arg1 = args(0).string_value (); |
|
|
1028 |
|
|
1029 if (! error_state) |
|
|
1030 { |
|
|
1031 if (arg1.find ('%') == NPOS) |
|
|
1032 { |
|
|
1033 id = arg1; |
|
|
1034 |
|
|
1035 nargs.resize (nargin-1); |
|
|
1036 |
|
|
1037 for (int i = 1; i < nargin; i++) |
|
|
1038 nargs(i-1) = args(i); |
|
|
1039 } |
|
|
1040 } |
|
|
1041 else |
|
|
1042 return retval; |
|
|
1043 } |
|
|
1044 |
|
|
1045 // handle_message. |
|
|
1046 |
|
3935
|
1047 std::string prev_msg = Vlast_warning_message; |
|
|
1048 |
|
5567
|
1049 std::string curr_msg = handle_message (warning_with_id, id.c_str (), |
|
|
1050 "unspecified warning", nargs); |
|
3935
|
1051 |
|
|
1052 if (nargout > 0) |
|
5567
|
1053 retval = prev_msg; |
|
3935
|
1054 } |
|
|
1055 |
|
3934
|
1056 return retval; |
|
|
1057 } |
|
|
1058 |
|
5567
|
1059 DEFUN (lasterr, args, nargout, |
|
3935
|
1060 "-*- texinfo -*-\n\ |
|
5567
|
1061 @deftypefn {Built-in Function} {[@var{msg}, @var{msgid}] =} lasterr (@var{msg}, @var{msgid})\n\ |
|
3935
|
1062 Without any arguments, return the last error message. With one\n\ |
|
5567
|
1063 argument, set the last error message to @var{msg}. With two arguments,\n\ |
|
|
1064 also set the last message identifier.\n\ |
|
3935
|
1065 @end deftypefn") |
|
|
1066 { |
|
|
1067 octave_value_list retval; |
|
|
1068 |
|
|
1069 int argc = args.length () + 1; |
|
|
1070 |
|
5567
|
1071 if (argc < 4) |
|
5335
|
1072 { |
|
|
1073 string_vector argv = args.make_argv ("lasterr"); |
|
3935
|
1074 |
|
5335
|
1075 if (! error_state) |
|
|
1076 { |
|
5567
|
1077 std::string prev_error_id = Vlast_error_id; |
|
|
1078 std::string prev_error_message = Vlast_error_message; |
|
|
1079 |
|
|
1080 if (argc > 2) |
|
|
1081 Vlast_error_id = argv(2); |
|
|
1082 |
|
|
1083 if (argc > 1) |
|
5335
|
1084 Vlast_error_message = argv(1); |
|
5567
|
1085 |
|
|
1086 if (argc == 1 || nargout > 0) |
|
|
1087 { |
|
|
1088 retval(1) = prev_error_id; |
|
|
1089 retval(0) = prev_error_message; |
|
|
1090 } |
|
5335
|
1091 } |
|
5567
|
1092 else |
|
5582
|
1093 error ("lasterr: expecting arguments to be character strings"); |
|
5335
|
1094 } |
|
3935
|
1095 else |
|
|
1096 print_usage ("lasterr"); |
|
|
1097 |
|
|
1098 return retval; |
|
|
1099 } |
|
|
1100 |
|
4699
|
1101 // For backward compatibility. |
|
|
1102 DEFALIAS (error_text, lasterr); |
|
|
1103 DEFALIAS (__error_text__, lasterr); |
|
|
1104 |
|
5567
|
1105 DEFUN (lastwarn, args, nargout, |
|
3934
|
1106 "-*- texinfo -*-\n\ |
|
5567
|
1107 @deftypefn {Built-in Function} {[@var{msg}, @var{msgid}] =} lastwarn (@var{msg}, @var{msgid})\n\ |
|
3935
|
1108 Without any arguments, return the last warning message. With one\n\ |
|
5567
|
1109 argument, set the last warning message to @var{msg}. With two arguments,\n\ |
|
|
1110 also set the last message identifier.\n\ |
|
3934
|
1111 @end deftypefn") |
|
|
1112 { |
|
|
1113 octave_value_list retval; |
|
|
1114 |
|
|
1115 int argc = args.length () + 1; |
|
|
1116 |
|
5567
|
1117 if (argc < 4) |
|
|
1118 { |
|
|
1119 string_vector argv = args.make_argv ("lastwarn"); |
|
|
1120 |
|
|
1121 if (! error_state) |
|
|
1122 { |
|
|
1123 std::string prev_warning_id = Vlast_warning_id; |
|
|
1124 std::string prev_warning_message = Vlast_warning_message; |
|
|
1125 |
|
|
1126 if (argc > 2) |
|
|
1127 Vlast_warning_id = argv(2); |
|
3934
|
1128 |
|
5567
|
1129 if (argc > 1) |
|
|
1130 Vlast_warning_message = argv(1); |
|
|
1131 |
|
|
1132 if (argc == 1 || nargout > 0) |
|
|
1133 { |
|
5582
|
1134 warning_state = 0; |
|
5567
|
1135 retval(1) = prev_warning_id; |
|
|
1136 retval(0) = prev_warning_message; |
|
|
1137 } |
|
|
1138 } |
|
|
1139 else |
|
|
1140 error ("lastwarn: expecting arguments to be character strings"); |
|
|
1141 } |
|
3934
|
1142 else |
|
|
1143 print_usage ("lastwarn"); |
|
|
1144 |
|
|
1145 return retval; |
|
897
|
1146 } |
|
|
1147 |
|
1957
|
1148 DEFUN (usage, args, , |
|
3373
|
1149 "-*- texinfo -*-\n\ |
|
|
1150 @deftypefn {Built-in Function} {} usage (@var{msg})\n\ |
|
|
1151 Print the message @var{msg}, prefixed by the string @samp{usage: }, and\n\ |
|
|
1152 set Octave's internal error state such that control will return to the\n\ |
|
|
1153 top level without evaluating any more commands. This is useful for\n\ |
|
|
1154 aborting from functions.\n\ |
|
|
1155 \n\ |
|
|
1156 After @code{usage} is evaluated, Octave will print a traceback of all\n\ |
|
|
1157 the function calls leading to the usage message.\n\ |
|
899
|
1158 \n\ |
|
3373
|
1159 You should use this function for reporting problems errors that result\n\ |
|
|
1160 from an improper call to a function, such as calling a function with an\n\ |
|
|
1161 incorrect number of arguments, or with arguments of the wrong type. For\n\ |
|
|
1162 example, most functions distributed with Octave begin with code like\n\ |
|
|
1163 this\n\ |
|
|
1164 \n\ |
|
|
1165 @example\n\ |
|
|
1166 @group\n\ |
|
|
1167 if (nargin != 2)\n\ |
|
|
1168 usage (\"foo (a, b)\");\n\ |
|
|
1169 endif\n\ |
|
|
1170 @end group\n\ |
|
|
1171 @end example\n\ |
|
|
1172 \n\ |
|
|
1173 @noindent\n\ |
|
|
1174 to check for the proper number of arguments.\n\ |
|
|
1175 @end deftypefn") |
|
899
|
1176 { |
|
3934
|
1177 octave_value_list retval; |
|
5567
|
1178 handle_message (usage_with_id, "", "unknown", args); |
|
3934
|
1179 return retval; |
|
899
|
1180 } |
|
|
1181 |
|
2174
|
1182 static int |
|
|
1183 beep_on_error (void) |
|
|
1184 { |
|
|
1185 Vbeep_on_error = check_preference ("beep_on_error"); |
|
|
1186 |
|
|
1187 return 0; |
|
|
1188 } |
|
|
1189 |
|
3707
|
1190 static int |
|
|
1191 debug_on_error (void) |
|
|
1192 { |
|
|
1193 Vdebug_on_error = check_preference ("debug_on_error"); |
|
|
1194 |
|
|
1195 return 0; |
|
|
1196 } |
|
|
1197 |
|
|
1198 static int |
|
|
1199 debug_on_warning (void) |
|
|
1200 { |
|
|
1201 Vdebug_on_warning = check_preference ("debug_on_warning"); |
|
|
1202 |
|
|
1203 return 0; |
|
|
1204 } |
|
|
1205 |
|
2174
|
1206 void |
|
|
1207 symbols_of_error (void) |
|
|
1208 { |
|
5567
|
1209 init_warning_options (); |
|
|
1210 |
|
4233
|
1211 DEFVAR (beep_on_error, false, beep_on_error, |
|
3373
|
1212 "-*- texinfo -*-\n\ |
|
|
1213 @defvr {Built-in Variable} beep_on_error\n\ |
|
|
1214 If the value of @code{beep_on_error} is nonzero, Octave will try\n\ |
|
|
1215 to ring your terminal's bell before printing an error message. The\n\ |
|
|
1216 default value is 0.\n\ |
|
|
1217 @end defvr"); |
|
3018
|
1218 |
|
4233
|
1219 DEFVAR (debug_on_error, false, debug_on_error, |
|
3707
|
1220 "-*- texinfo -*-\n\ |
|
|
1221 @defvr {Built-in Variable} debug_on_error\n\ |
|
|
1222 If the value of @code{debug_on_error} is nonzero, Octave will try\n\ |
|
|
1223 to enter the debugger when an error is encountered. This will also\n\ |
|
|
1224 inhibit printing of the normal traceback message (you will only see\n\ |
|
|
1225 the top-level error message). The default value is 0.\n\ |
|
|
1226 @end defvr"); |
|
|
1227 |
|
4233
|
1228 DEFVAR (debug_on_warning, false, debug_on_warning, |
|
3707
|
1229 "-*- texinfo -*-\n\ |
|
|
1230 @defvr {Built-in Variable} debug_on_warning\n\ |
|
|
1231 If the value of @code{debug_on_warning} is nonzero, Octave will try\n\ |
|
|
1232 to enter the debugger when a warning is encountered. The default\n\ |
|
|
1233 value is 0.\n\ |
|
|
1234 @end defvr"); |
|
2174
|
1235 } |
|
|
1236 |
|
1
|
1237 /* |
|
|
1238 ;;; Local Variables: *** |
|
|
1239 ;;; mode: C++ *** |
|
|
1240 ;;; End: *** |
|
|
1241 */ |
