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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, 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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437
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31 #include "utils.h" |
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32 #include "error.h" |
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169
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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 static void |
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69 error_1 (const char *name, const char *fmt, va_list args) |
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70 { |
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71 if (error_state != -2) |
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72 { |
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73 if (! error_state) |
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74 error_state = 1; |
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75 |
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76 if (! suppress_octave_error_messages) |
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77 { |
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78 int len = 0; |
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79 if (fmt && *fmt && fmt[(len = strlen (fmt)) - 1] == '\n') |
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80 { |
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81 error_state = -2; |
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82 char *tmp_fmt = strsave (fmt); |
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83 tmp_fmt[len - 1] = '\0'; |
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84 verror (name, tmp_fmt, args); |
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85 delete [] tmp_fmt; |
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86 } |
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87 else |
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88 verror (name, fmt, args); |
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89 } |
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90 } |
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91 } |
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92 |
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93 void |
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94 message (const char *name, const char *fmt, ...) |
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95 { |
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96 va_list args; |
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97 va_start (args, fmt); |
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98 verror (name, fmt, args); |
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99 va_end (args); |
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100 } |
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101 |
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102 void |
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103 usage (const char *fmt, ...) |
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104 { |
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105 va_list args; |
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106 va_start (args, fmt); |
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107 error_state = -1; |
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108 verror ("usage", fmt, args); |
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109 va_end (args); |
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110 } |
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111 |
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112 void |
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113 warning (const char *fmt, ...) |
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114 { |
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115 va_list args; |
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116 va_start (args, fmt); |
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117 verror ("warning", fmt, args); |
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118 va_end (args); |
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119 } |
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120 |
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121 void |
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122 error (const char *fmt, ...) |
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123 { |
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124 va_list args; |
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125 va_start (args, fmt); |
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126 error_1 ("error", fmt, args); |
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127 va_end (args); |
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128 } |
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129 |
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130 void |
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131 parse_error (const char *fmt, ...) |
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132 { |
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133 va_list args; |
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134 va_start (args, fmt); |
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135 error_1 (0, fmt, args); |
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136 va_end (args); |
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137 } |
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138 |
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189
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139 void |
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140 panic (const char *fmt, ...) |
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141 { |
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142 flush_output_to_pager (); |
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143 |
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144 va_list args; |
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145 va_start (args, fmt); |
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146 verror ("panic", fmt, args); |
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147 va_end (args); |
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148 abort (); |
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149 } |
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150 |
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151 DEFUN ("error", Ferror, Serror, 1, 1, |
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152 "error (MESSAGE): print MESSAGE and set the error state.\n\ |
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153 This should eventually take us up to the top level, possibly\n\ |
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154 printing traceback messages as we go.\n\ |
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155 \n\ |
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156 If MESSAGE ends in a newline character, traceback messages are not\n\ |
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157 printed.") |
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158 { |
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159 Octave_object retval; |
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160 |
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161 char *msg = "unspecified error"; |
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162 |
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163 int nargin = args.length (); |
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164 |
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712
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165 if (nargin == 1 && args(0).is_defined ()) |
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528
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166 { |
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712
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167 if (args(0).is_string ()) |
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528
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168 { |
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712
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169 msg = args(0).string_value (); |
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170 |
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171 if (! msg || ! *msg) |
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172 return retval; |
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173 } |
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174 else if (args(0).is_empty ()) |
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175 return retval; |
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176 } |
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177 |
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178 error (msg); |
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179 |
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180 return retval; |
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181 } |
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182 |
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183 DEFUN ("warning", Fwarning, Swarning, 1, 1, |
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184 "warning (MESSAGE): print a warning MESSAGE.\n\ |
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185 \n\ |
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186 See also: error") |
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187 { |
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188 Octave_object retval; |
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189 |
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190 char *msg = "unspecified warning"; |
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191 |
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192 int nargin = args.length (); |
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193 |
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194 if (nargin == 1 && args(0).is_defined ()) |
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195 { |
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196 if (args(0).is_string ()) |
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197 { |
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198 msg = args(0).string_value (); |
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199 |
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200 if (! msg || ! *msg) |
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201 return retval; |
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202 } |
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203 else if (args(0).is_empty ()) |
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204 return retval; |
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205 } |
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206 |
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207 warning (msg); |
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208 |
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209 return retval; |
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210 } |
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211 |
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212 DEFUN ("usage", Fusage, Susage, 1, 1, |
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213 "usage (MESSAGE): print a usage MESSAGE.\n\ |
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214 \n\ |
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215 See also: error") |
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216 { |
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217 Octave_object retval; |
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218 |
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219 char *msg = "unknown"; |
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220 |
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221 int nargin = args.length (); |
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222 |
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223 if (nargin == 1 && args(0).is_defined ()) |
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224 { |
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225 if (args(0).is_string ()) |
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226 { |
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227 msg = args(0).string_value (); |
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228 |
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229 if (! msg || ! *msg) |
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230 return retval; |
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231 } |
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232 else if (args(0).is_empty ()) |
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233 return retval; |
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234 } |
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235 |
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236 usage (msg); |
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237 |
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238 return retval; |
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239 } |
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240 |
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241 /* |
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242 ;;; Local Variables: *** |
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243 ;;; mode: C++ *** |
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244 ;;; page-delimiter: "^/\\*" *** |
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245 ;;; End: *** |
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246 */ |
