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1 // error.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, 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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25 #include "config.h" |
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26 #endif |
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27 |
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28 #include <strstream.h> |
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29 #include <stdarg.h> |
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30 |
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31 #include "utils.h" |
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32 #include "error.h" |
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33 #include "pager.h" |
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34 #include "oct-obj.h" |
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35 #include "tree-const.h" |
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36 #include "defun.h" |
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37 |
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38 // Current error state. |
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39 int error_state; |
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40 |
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41 static void |
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42 verror (const char *name, const char *fmt, va_list args) |
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43 { |
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44 cerr << name << ": "; |
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45 cerr.vform (fmt, args); |
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46 cerr << endl; |
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47 |
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48 ostrstream output_buf; |
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49 |
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50 if (name) |
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51 output_buf << name << ": "; |
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52 output_buf.vform (fmt, args); |
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53 output_buf << endl; |
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54 |
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55 char *msg = output_buf.str (); |
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56 |
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57 maybe_write_to_diary_file (msg); |
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58 |
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59 delete [] msg; |
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60 } |
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61 |
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62 void |
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63 message (const char *name, const char *fmt, ...) |
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64 { |
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65 va_list args; |
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66 va_start (args, fmt); |
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67 verror (name, fmt, args); |
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68 va_end (args); |
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69 } |
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70 |
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71 void |
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72 usage (const char *fmt, ...) |
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73 { |
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74 va_list args; |
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75 va_start (args, fmt); |
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76 verror ("usage", fmt, args); |
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77 va_end (args); |
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78 } |
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79 |
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80 void |
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81 warning (const char *fmt, ...) |
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82 { |
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83 va_list args; |
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84 va_start (args, fmt); |
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85 verror ("warning", fmt, args); |
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86 va_end (args); |
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87 } |
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88 |
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89 void |
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90 error (const char *fmt, ...) |
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91 { |
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92 if (error_state == -2) |
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93 return; |
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94 |
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95 if (! error_state) |
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96 error_state = 1; |
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97 |
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98 flush_output_to_pager (); |
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99 |
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100 va_list args; |
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101 va_start (args, fmt); |
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102 |
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103 int len; |
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104 if (fmt && *fmt && fmt[(len = strlen (fmt)) - 1] == '\n') |
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105 { |
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106 error_state = -2; |
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107 char *tmp_fmt = strsave (fmt); |
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108 tmp_fmt[len - 1] = '\0'; |
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109 verror ("error", tmp_fmt, args); |
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110 delete [] tmp_fmt; |
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111 } |
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112 else |
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113 verror ("error", fmt, args); |
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114 |
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115 va_end (args); |
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116 } |
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117 |
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118 void |
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119 panic (const char *fmt, ...) |
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120 { |
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121 flush_output_to_pager (); |
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122 |
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123 va_list args; |
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124 va_start (args, fmt); |
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125 verror ("panic", fmt, args); |
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126 va_end (args); |
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127 abort (); |
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128 } |
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129 |
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130 DEFUN ("error", Ferror, Serror, 2, 1, |
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131 "error (MESSAGE): print MESSAGE and set the error state.\n\ |
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132 This should eventually take us up to the top level, possibly\n\ |
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133 printing traceback messages as we go.\n\ |
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134 \n\ |
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135 If MESSAGE ends in a newline character, traceback messages are not\n\ |
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136 printed.") |
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137 { |
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138 Octave_object retval; |
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139 |
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140 char *msg = "unspecified_error"; |
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141 |
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142 int nargin = args.length (); |
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143 |
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144 if (nargin == 2 && args(1).is_defined ()) |
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145 { |
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146 if (args(1).is_string_type ()) |
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147 { |
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148 msg = args(1).string_value (); |
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149 |
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150 if (! msg || ! *msg) |
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151 return retval; |
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152 } |
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153 else if (args(1).is_empty ()) |
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154 return retval; |
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155 } |
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156 |
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157 error (msg); |
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158 |
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159 return retval; |
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160 } |
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161 |
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162 /* |
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163 ;;; Local Variables: *** |
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164 ;;; mode: C++ *** |
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165 ;;; page-delimiter: "^/\\*" *** |
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166 ;;; End: *** |
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167 */ |
