Merge from mainline
[official-gcc.git] / gcc / cpperror.c
blob6603a20710c4d4d3edef8f97185b3817f8d4e6df
1 /* Default error handlers for CPP Library.
2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1998, 1999, 2000,
3 2001, 2002 Free Software Foundation, Inc.
4 Written by Per Bothner, 1994.
5 Based on CCCP program by Paul Rubin, June 1986
6 Adapted to ANSI C, Richard Stallman, Jan 1987
8 This program is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
11 later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 In other words, you are welcome to use, share and improve this program.
23 You are forbidden to forbid anyone else to use, share and improve
24 what you give them. Help stamp out software-hoarding! */
26 #include "config.h"
27 #include "system.h"
28 #include "cpplib.h"
29 #include "cpphash.h"
30 #include "intl.h"
32 static void print_location PARAMS ((cpp_reader *, unsigned int, unsigned int));
34 /* Print the logical file location (LINE, COL) in preparation for a
35 diagnostic. Outputs the #include chain if it has changed. A line
36 of zero suppresses the include stack, and outputs the program name
37 instead. */
38 static void
39 print_location (pfile, line, col)
40 cpp_reader *pfile;
41 unsigned int line, col;
43 if (!pfile->buffer || line == 0)
44 fprintf (stderr, "%s: ", progname);
45 else
47 const struct line_map *map;
49 map = lookup_line (&pfile->line_maps, line);
50 print_containing_files (&pfile->line_maps, map);
52 line = SOURCE_LINE (map, line);
53 if (col == 0)
54 col = 1;
56 if (line == 0)
57 fprintf (stderr, "%s:", map->to_file);
58 else if (CPP_OPTION (pfile, show_column) == 0)
59 fprintf (stderr, "%s:%u:", map->to_file, line);
60 else
61 fprintf (stderr, "%s:%u:%u:", map->to_file, line, col);
63 fputc (' ', stderr);
67 /* Set up for a diagnostic: print the file and line, bump the error
68 counter, etc. LINE is the logical line number; zero means to print
69 at the location of the previously lexed token, which tends to be
70 the correct place by default. Returns 0 if the error has been
71 suppressed. */
72 int
73 _cpp_begin_message (pfile, code, line, column)
74 cpp_reader *pfile;
75 int code;
76 unsigned int line, column;
78 int level = DL_EXTRACT (code);
80 switch (level)
82 case DL_WARNING:
83 case DL_PEDWARN:
84 if (CPP_IN_SYSTEM_HEADER (pfile)
85 && ! CPP_OPTION (pfile, warn_system_headers))
86 return 0;
87 /* Fall through. */
89 case DL_WARNING_SYSHDR:
90 if (CPP_OPTION (pfile, warnings_are_errors)
91 || (level == DL_PEDWARN && CPP_OPTION (pfile, pedantic_errors)))
93 if (CPP_OPTION (pfile, inhibit_errors))
94 return 0;
95 level = DL_ERROR;
96 pfile->errors++;
98 else if (CPP_OPTION (pfile, inhibit_warnings))
99 return 0;
100 break;
102 case DL_ERROR:
103 if (CPP_OPTION (pfile, inhibit_errors))
104 return 0;
105 /* ICEs cannot be inhibited. */
106 case DL_ICE:
107 pfile->errors++;
108 break;
111 print_location (pfile, line, column);
112 if (DL_WARNING_P (level))
113 fputs (_("warning: "), stderr);
114 else if (level == DL_ICE)
115 fputs (_("internal error: "), stderr);
117 return 1;
120 /* Don't remove the blank before do, as otherwise the exgettext
121 script will mistake this as a function definition */
122 #define v_message(msgid, ap) \
123 do { vfprintf (stderr, _(msgid), ap); putc ('\n', stderr); } while (0)
125 /* Exported interface. */
127 /* Print an error at the location of the previously lexed token. */
128 void
129 cpp_error VPARAMS ((cpp_reader * pfile, int level, const char *msgid, ...))
131 unsigned int line, column;
133 VA_OPEN (ap, msgid);
134 VA_FIXEDARG (ap, cpp_reader *, pfile);
135 VA_FIXEDARG (ap, int, level);
136 VA_FIXEDARG (ap, const char *, msgid);
138 if (pfile->buffer)
140 line = pfile->cur_token[-1].line;
141 column = pfile->cur_token[-1].col;
143 else
144 line = column = 0;
146 if (_cpp_begin_message (pfile, level, line, column))
147 v_message (msgid, ap);
149 VA_CLOSE (ap);
152 /* Print an error at a specific location. */
153 void
154 cpp_error_with_line VPARAMS ((cpp_reader *pfile, int level,
155 unsigned int line, unsigned int column,
156 const char *msgid, ...))
158 VA_OPEN (ap, msgid);
159 VA_FIXEDARG (ap, cpp_reader *, pfile);
160 VA_FIXEDARG (ap, int, level);
161 VA_FIXEDARG (ap, unsigned int, line);
162 VA_FIXEDARG (ap, unsigned int, column);
163 VA_FIXEDARG (ap, const char *, msgid);
165 if (_cpp_begin_message (pfile, level, line, column))
166 v_message (msgid, ap);
168 VA_CLOSE (ap);
171 void
172 cpp_errno (pfile, level, msgid)
173 cpp_reader *pfile;
174 int level;
175 const char *msgid;
177 if (msgid[0] == '\0')
178 msgid = _("stdout");
180 cpp_error (pfile, level, "%s: %s", msgid, xstrerror (errno));