1 /* Default error handlers for CPP Library. 2 Copyright (C) 1986-2022 Free Software Foundation, Inc. 3 Written by Per Bothner, 1994. 4 Based on CCCP program by Paul Rubin, June 1986 5 Adapted to ANSI C, Richard Stallman, Jan 1987 6 7 This program is free software; you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published by the 9 Free Software Foundation; either version 3, or (at your option) any 10 later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. 20 21 In other words, you are welcome to use, share and improve this program. 22 You are forbidden to forbid anyone else to use, share and improve 23 what you give them. Help stamp out software-hoarding! */ 24 25 #include "config.h" 26 #include "system.h" 27 #include "cpplib.h" 28 #include "internal.h" 29 30 /* Get a location_t for the current location in PFILE, 31 generally that of the previously lexed token. */ 32 33 location_t 34 cpp_diagnostic_get_current_location (cpp_reader *pfile) 35 { 36 if (CPP_OPTION (pfile, traditional)) 37 { 38 if (pfile->state.in_directive) 39 return pfile->directive_line; 40 else 41 return pfile->line_table->highest_line; 42 } 43 /* We don't want to refer to a token before the beginning of the 44 current run -- that is invalid. */ 45 else if (pfile->cur_token == pfile->cur_run->base) 46 { 47 return 0; 48 } 49 else 50 { 51 return pfile->cur_token[-1].src_loc; 52 } 53 } 54 55 /* Print a diagnostic at the given location. */ 56 57 ATTRIBUTE_FPTR_PRINTF(5,0) 58 static bool 59 cpp_diagnostic_at (cpp_reader * pfile, enum cpp_diagnostic_level level, 60 enum cpp_warning_reason reason, rich_location *richloc, 61 const char *msgid, va_list *ap) 62 { 63 bool ret; 64 65 if (!pfile->cb.diagnostic) 66 abort (); 67 ret = pfile->cb.diagnostic (pfile, level, reason, richloc, _(msgid), ap); 68 69 return ret; 70 } 71 72 /* Print a diagnostic at the location of the previously lexed token. */ 73 74 ATTRIBUTE_FPTR_PRINTF(4,0) 75 static bool 76 cpp_diagnostic (cpp_reader * pfile, enum cpp_diagnostic_level level, 77 enum cpp_warning_reason reason, 78 const char *msgid, va_list *ap) 79 { 80 location_t src_loc = cpp_diagnostic_get_current_location (pfile); 81 rich_location richloc (pfile->line_table, src_loc); 82 return cpp_diagnostic_at (pfile, level, reason, &richloc, msgid, ap); 83 } 84 85 /* Print a warning or error, depending on the value of LEVEL. */ 86 87 bool 88 cpp_error (cpp_reader * pfile, enum cpp_diagnostic_level level, 89 const char *msgid, ...) 90 { 91 va_list ap; 92 bool ret; 93 94 va_start (ap, msgid); 95 96 ret = cpp_diagnostic (pfile, level, CPP_W_NONE, msgid, &ap); 97 98 va_end (ap); 99 return ret; 100 } 101 102 /* Print a warning. The warning reason may be given in REASON. */ 103 104 bool 105 cpp_warning (cpp_reader * pfile, enum cpp_warning_reason reason, 106 const char *msgid, ...) 107 { 108 va_list ap; 109 bool ret; 110 111 va_start (ap, msgid); 112 113 ret = cpp_diagnostic (pfile, CPP_DL_WARNING, reason, msgid, &ap); 114 115 va_end (ap); 116 return ret; 117 } 118 119 /* Print a pedantic warning. The warning reason may be given in REASON. */ 120 121 bool 122 cpp_pedwarning (cpp_reader * pfile, enum cpp_warning_reason reason, 123 const char *msgid, ...) 124 { 125 va_list ap; 126 bool ret; 127 128 va_start (ap, msgid); 129 130 ret = cpp_diagnostic (pfile, CPP_DL_PEDWARN, reason, msgid, &ap); 131 132 va_end (ap); 133 return ret; 134 } 135 136 /* Print a warning, including system headers. The warning reason may be 137 given in REASON. */ 138 139 bool 140 cpp_warning_syshdr (cpp_reader * pfile, enum cpp_warning_reason reason, 141 const char *msgid, ...) 142 { 143 va_list ap; 144 bool ret; 145 146 va_start (ap, msgid); 147 148 ret = cpp_diagnostic (pfile, CPP_DL_WARNING_SYSHDR, reason, msgid, &ap); 149 150 va_end (ap); 151 return ret; 152 } 153 154 /* As cpp_warning above, but use RICHLOC as the location of the diagnostic. */ 155 156 bool cpp_warning_at (cpp_reader *pfile, enum cpp_warning_reason reason, 157 rich_location *richloc, const char *msgid, ...) 158 { 159 va_list ap; 160 bool ret; 161 162 va_start (ap, msgid); 163 164 ret = cpp_diagnostic_at (pfile, CPP_DL_WARNING, reason, richloc, 165 msgid, &ap); 166 167 va_end (ap); 168 return ret; 169 170 } 171 172 /* As cpp_pedwarning above, but use RICHLOC as the location of the 173 diagnostic. */ 174 175 bool 176 cpp_pedwarning_at (cpp_reader * pfile, enum cpp_warning_reason reason, 177 rich_location *richloc, const char *msgid, ...) 178 { 179 va_list ap; 180 bool ret; 181 182 va_start (ap, msgid); 183 184 ret = cpp_diagnostic_at (pfile, CPP_DL_PEDWARN, reason, richloc, 185 msgid, &ap); 186 187 va_end (ap); 188 return ret; 189 } 190 191 /* Print a diagnostic at a specific location. */ 192 193 ATTRIBUTE_FPTR_PRINTF(6,0) 194 static bool 195 cpp_diagnostic_with_line (cpp_reader * pfile, enum cpp_diagnostic_level level, 196 enum cpp_warning_reason reason, 197 location_t src_loc, unsigned int column, 198 const char *msgid, va_list *ap) 199 { 200 bool ret; 201 202 if (!pfile->cb.diagnostic) 203 abort (); 204 rich_location richloc (pfile->line_table, src_loc); 205 if (column) 206 richloc.override_column (column); 207 ret = pfile->cb.diagnostic (pfile, level, reason, &richloc, _(msgid), ap); 208 209 return ret; 210 } 211 212 /* Print a warning or error, depending on the value of LEVEL. */ 213 214 bool 215 cpp_error_with_line (cpp_reader *pfile, enum cpp_diagnostic_level level, 216 location_t src_loc, unsigned int column, 217 const char *msgid, ...) 218 { 219 va_list ap; 220 bool ret; 221 222 va_start (ap, msgid); 223 224 ret = cpp_diagnostic_with_line (pfile, level, CPP_W_NONE, src_loc, 225 column, msgid, &ap); 226 227 va_end (ap); 228 return ret; 229 } 230 231 /* Print a warning. The warning reason may be given in REASON. */ 232 233 bool 234 cpp_warning_with_line (cpp_reader *pfile, enum cpp_warning_reason reason, 235 location_t src_loc, unsigned int column, 236 const char *msgid, ...) 237 { 238 va_list ap; 239 bool ret; 240 241 va_start (ap, msgid); 242 243 ret = cpp_diagnostic_with_line (pfile, CPP_DL_WARNING, reason, src_loc, 244 column, msgid, &ap); 245 246 va_end (ap); 247 return ret; 248 } 249 250 /* Print a pedantic warning. The warning reason may be given in REASON. */ 251 252 bool 253 cpp_pedwarning_with_line (cpp_reader *pfile, enum cpp_warning_reason reason, 254 location_t src_loc, unsigned int column, 255 const char *msgid, ...) 256 { 257 va_list ap; 258 bool ret; 259 260 va_start (ap, msgid); 261 262 ret = cpp_diagnostic_with_line (pfile, CPP_DL_PEDWARN, reason, src_loc, 263 column, msgid, &ap); 264 265 va_end (ap); 266 return ret; 267 } 268 269 /* Print a warning, including system headers. The warning reason may be 270 given in REASON. */ 271 272 bool 273 cpp_warning_with_line_syshdr (cpp_reader *pfile, enum cpp_warning_reason reason, 274 location_t src_loc, unsigned int column, 275 const char *msgid, ...) 276 { 277 va_list ap; 278 bool ret; 279 280 va_start (ap, msgid); 281 282 ret = cpp_diagnostic_with_line (pfile, CPP_DL_WARNING_SYSHDR, reason, src_loc, 283 column, msgid, &ap); 284 285 va_end (ap); 286 return ret; 287 } 288 289 /* As cpp_error, but use SRC_LOC as the location of the error, without 290 a column override. */ 291 292 bool 293 cpp_error_at (cpp_reader * pfile, enum cpp_diagnostic_level level, 294 location_t src_loc, const char *msgid, ...) 295 { 296 va_list ap; 297 bool ret; 298 299 va_start (ap, msgid); 300 301 rich_location richloc (pfile->line_table, src_loc); 302 ret = cpp_diagnostic_at (pfile, level, CPP_W_NONE, &richloc, 303 msgid, &ap); 304 305 va_end (ap); 306 return ret; 307 } 308 309 /* As cpp_error, but use RICHLOC as the location of the error, without 310 a column override. */ 311 312 bool 313 cpp_error_at (cpp_reader * pfile, enum cpp_diagnostic_level level, 314 rich_location *richloc, const char *msgid, ...) 315 { 316 va_list ap; 317 bool ret; 318 319 va_start (ap, msgid); 320 321 ret = cpp_diagnostic_at (pfile, level, CPP_W_NONE, richloc, 322 msgid, &ap); 323 324 va_end (ap); 325 return ret; 326 } 327 328 /* Print a warning or error, depending on the value of LEVEL. Include 329 information from errno. */ 330 331 bool 332 cpp_errno (cpp_reader *pfile, enum cpp_diagnostic_level level, 333 const char *msgid) 334 { 335 return cpp_error (pfile, level, "%s: %s", _(msgid), xstrerror (errno)); 336 } 337 338 /* Print a warning or error, depending on the value of LEVEL. Include 339 information from errno. Unlike cpp_errno, the argument is a filename 340 that is not localized, but "" is replaced with localized "stdout". */ 341 342 bool 343 cpp_errno_filename (cpp_reader *pfile, enum cpp_diagnostic_level level, 344 const char *filename, 345 location_t loc) 346 { 347 if (filename[0] == '\0') 348 filename = _("stdout"); 349 350 return cpp_error_at (pfile, level, loc, "%s: %s", filename, 351 xstrerror (errno)); 352 } 353