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
cpp_diagnostic_get_current_location(cpp_reader * pfile)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
cpp_diagnostic_at(cpp_reader * pfile,enum cpp_diagnostic_level level,enum cpp_warning_reason reason,rich_location * richloc,const char * msgid,va_list * ap)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
cpp_diagnostic(cpp_reader * pfile,enum cpp_diagnostic_level level,enum cpp_warning_reason reason,const char * msgid,va_list * ap)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
cpp_error(cpp_reader * pfile,enum cpp_diagnostic_level level,const char * msgid,...)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
cpp_warning(cpp_reader * pfile,enum cpp_warning_reason reason,const char * msgid,...)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
cpp_pedwarning(cpp_reader * pfile,enum cpp_warning_reason reason,const char * msgid,...)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
cpp_warning_syshdr(cpp_reader * pfile,enum cpp_warning_reason reason,const char * msgid,...)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
cpp_warning_at(cpp_reader * pfile,enum cpp_warning_reason reason,rich_location * richloc,const char * msgid,...)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
cpp_pedwarning_at(cpp_reader * pfile,enum cpp_warning_reason reason,rich_location * richloc,const char * msgid,...)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
cpp_diagnostic_with_line(cpp_reader * pfile,enum cpp_diagnostic_level level,enum cpp_warning_reason reason,location_t src_loc,unsigned int column,const char * msgid,va_list * ap)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
cpp_error_with_line(cpp_reader * pfile,enum cpp_diagnostic_level level,location_t src_loc,unsigned int column,const char * msgid,...)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
cpp_warning_with_line(cpp_reader * pfile,enum cpp_warning_reason reason,location_t src_loc,unsigned int column,const char * msgid,...)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
cpp_pedwarning_with_line(cpp_reader * pfile,enum cpp_warning_reason reason,location_t src_loc,unsigned int column,const char * msgid,...)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
cpp_warning_with_line_syshdr(cpp_reader * pfile,enum cpp_warning_reason reason,location_t src_loc,unsigned int column,const char * msgid,...)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
cpp_error_at(cpp_reader * pfile,enum cpp_diagnostic_level level,location_t src_loc,const char * msgid,...)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
cpp_error_at(cpp_reader * pfile,enum cpp_diagnostic_level level,rich_location * richloc,const char * msgid,...)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
cpp_errno(cpp_reader * pfile,enum cpp_diagnostic_level level,const char * msgid)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
cpp_errno_filename(cpp_reader * pfile,enum cpp_diagnostic_level level,const char * filename,location_t loc)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