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