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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, 1995 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 <cstdarg> |
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29 |
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30 #include <strstream.h> |
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31 |
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437
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32 #include "utils.h" |
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33 #include "error.h" |
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34 #include "pager.h" |
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35 #include "oct-obj.h" |
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36 #include "tree-const.h" |
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37 #include "defun.h" |
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38 |
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143
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39 // Current error state. |
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40 int error_state = 0; |
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41 |
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42 // XXX FIXME XXX |
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43 int suppress_octave_error_messages = 0; |
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143
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44 |
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45 static void |
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46 verror (const char *name, const char *fmt, va_list args) |
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47 { |
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48 flush_output_to_pager (); |
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49 |
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50 if (name) |
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51 cerr << name << ": "; |
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52 cerr.vform (fmt, args); |
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53 cerr << endl; |
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54 |
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55 ostrstream output_buf; |
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56 |
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57 if (name) |
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58 output_buf << name << ": "; |
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59 output_buf.vform (fmt, args); |
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60 output_buf << endl << ends; |
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61 |
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62 char *msg = output_buf.str (); |
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63 |
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64 maybe_write_to_diary_file (msg); |
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65 |
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66 delete [] msg; |
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67 } |
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68 |
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69 // Note that we don't actually print any message if the error string |
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70 // is just "" or "\n". This allows error ("") and error ("\n") to |
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71 // just set the error state. |
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72 |
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73 static void |
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74 error_1 (const char *name, const char *fmt, va_list args) |
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75 { |
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76 if (error_state != -2) |
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77 { |
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78 if (! error_state) |
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79 error_state = 1; |
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80 |
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81 if (! suppress_octave_error_messages) |
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82 { |
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83 if (fmt) |
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84 { |
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85 if (*fmt) |
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86 { |
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87 int len = strlen (fmt); |
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88 if (fmt[len - 1] == '\n') |
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89 { |
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90 error_state = -2; |
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91 |
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92 if (len > 1) |
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93 { |
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94 char *tmp_fmt = strsave (fmt); |
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95 tmp_fmt[len - 1] = '\0'; |
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96 verror (name, tmp_fmt, args); |
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97 delete [] tmp_fmt; |
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98 } |
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99 } |
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100 else |
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101 verror (name, fmt, args); |
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102 } |
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103 } |
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104 else |
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105 panic ("error_1: invalid format"); |
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106 } |
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107 } |
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108 } |
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109 |
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110 void |
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111 message (const char *name, const char *fmt, ...) |
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112 { |
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113 va_list args; |
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114 va_start (args, fmt); |
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115 verror (name, fmt, args); |
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116 va_end (args); |
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117 } |
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118 |
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119 void |
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120 usage (const char *fmt, ...) |
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121 { |
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122 va_list args; |
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123 va_start (args, fmt); |
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124 error_state = -1; |
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125 verror ("usage", fmt, args); |
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126 va_end (args); |
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127 } |
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128 |
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129 void |
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130 warning (const char *fmt, ...) |
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131 { |
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132 va_list args; |
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133 va_start (args, fmt); |
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134 verror ("warning", fmt, args); |
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135 va_end (args); |
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136 } |
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137 |
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138 void |
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139 error (const char *fmt, ...) |
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140 { |
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141 va_list args; |
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142 va_start (args, fmt); |
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143 error_1 ("error", fmt, args); |
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144 va_end (args); |
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145 } |
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146 |
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147 void |
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148 parse_error (const char *fmt, ...) |
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149 { |
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150 va_list args; |
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151 va_start (args, fmt); |
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152 error_1 (0, fmt, args); |
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153 va_end (args); |
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154 } |
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155 |
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189
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156 void |
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157 panic (const char *fmt, ...) |
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158 { |
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169
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159 flush_output_to_pager (); |
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160 |
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161 va_list args; |
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162 va_start (args, fmt); |
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163 verror ("panic", fmt, args); |
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164 va_end (args); |
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165 abort (); |
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166 } |
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167 |
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168 DEFUN ("error", Ferror, Serror, 1, 1, |
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169 "error (MESSAGE): print MESSAGE and set the error state.\n\ |
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170 This should eventually take us up to the top level, possibly\n\ |
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171 printing traceback messages as we go.\n\ |
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172 \n\ |
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173 If MESSAGE ends in a newline character, traceback messages are not\n\ |
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174 printed.") |
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175 { |
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176 Octave_object retval; |
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177 |
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178 char *msg = "unspecified error"; |
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179 |
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180 int nargin = args.length (); |
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181 |
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712
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182 if (nargin == 1 && args(0).is_defined ()) |
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183 { |
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712
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184 if (args(0).is_string ()) |
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185 { |
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186 msg = args(0).string_value (); |
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187 |
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188 if (! msg) |
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189 return retval; |
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190 } |
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191 else if (args(0).is_empty ()) |
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192 return retval; |
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193 } |
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194 |
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195 error (msg); |
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196 |
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197 return retval; |
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198 } |
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199 |
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200 DEFUN ("warning", Fwarning, Swarning, 1, 1, |
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201 "warning (MESSAGE): print a warning MESSAGE.\n\ |
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202 \n\ |
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203 See also: error") |
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204 { |
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205 Octave_object retval; |
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206 |
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207 char *msg = "unspecified warning"; |
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208 |
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209 int nargin = args.length (); |
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210 |
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211 if (nargin == 1 && args(0).is_defined ()) |
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212 { |
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213 if (args(0).is_string ()) |
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214 { |
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215 msg = args(0).string_value (); |
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216 |
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217 if (! msg || ! *msg) |
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218 return retval; |
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219 } |
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220 else if (args(0).is_empty ()) |
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221 return retval; |
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222 } |
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223 |
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224 warning (msg); |
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225 |
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226 return retval; |
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227 } |
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228 |
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229 DEFUN ("usage", Fusage, Susage, 1, 1, |
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230 "usage (MESSAGE): print a usage MESSAGE.\n\ |
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231 \n\ |
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232 See also: error") |
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233 { |
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234 Octave_object retval; |
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235 |
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236 char *msg = "unknown"; |
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237 |
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238 int nargin = args.length (); |
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239 |
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240 if (nargin == 1 && args(0).is_defined ()) |
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241 { |
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242 if (args(0).is_string ()) |
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243 { |
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244 msg = args(0).string_value (); |
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245 |
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246 if (! msg || ! *msg) |
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247 return retval; |
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248 } |
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249 else if (args(0).is_empty ()) |
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250 return retval; |
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251 } |
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252 |
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253 usage (msg); |
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254 |
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255 return retval; |
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256 } |
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257 |
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258 /* |
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259 ;;; Local Variables: *** |
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260 ;;; mode: C++ *** |
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261 ;;; page-delimiter: "^/\\*" *** |
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262 ;;; End: *** |
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263 */ |
