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
7
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.
12
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.
17
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.
21
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! */
25
26 #include "config.h"
27 #include "system.h"
28 #include "cpplib.h"
29 #include "cpphash.h"
30 #include "intl.h"
31
32 static void print_location PARAMS ((cpp_reader *, unsigned int, unsigned int));
33
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
print_location(pfile,line,col)39 print_location (pfile, line, col)
40 cpp_reader *pfile;
41 unsigned int line, col;
42 {
43 if (!pfile->buffer || line == 0)
44 fprintf (stderr, "%s: ", progname);
45 else
46 {
47 const struct line_map *map;
48
49 map = lookup_line (&pfile->line_maps, line);
50 print_containing_files (&pfile->line_maps, map);
51
52 line = SOURCE_LINE (map, line);
53 if (col == 0)
54 col = 1;
55
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);
62
63 fputc (' ', stderr);
64 }
65 }
66
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
_cpp_begin_message(pfile,code,line,column)73 _cpp_begin_message (pfile, code, line, column)
74 cpp_reader *pfile;
75 int code;
76 unsigned int line, column;
77 {
78 int level = DL_EXTRACT (code);
79
80 switch (level)
81 {
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. */
88
89 case DL_WARNING_SYSHDR:
90 if (CPP_OPTION (pfile, warnings_are_errors)
91 || (level == DL_PEDWARN && CPP_OPTION (pfile, pedantic_errors)))
92 {
93 if (CPP_OPTION (pfile, inhibit_errors))
94 return 0;
95 level = DL_ERROR;
96 pfile->errors++;
97 }
98 else if (CPP_OPTION (pfile, inhibit_warnings))
99 return 0;
100 break;
101
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;
109 }
110
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);
116
117 return 1;
118 }
119
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)
124
125 /* Exported interface. */
126
127 /* Print an error at the location of the previously lexed token. */
128 void
cpp_error(cpp_reader * pfile,int level,const char * msgid,...)129 cpp_error VPARAMS ((cpp_reader * pfile, int level, const char *msgid, ...))
130 {
131 unsigned int line, column;
132
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);
137
138 if (pfile->buffer)
139 {
140 if (CPP_OPTION (pfile, traditional))
141 {
142 if (pfile->state.in_directive)
143 line = pfile->directive_line;
144 else
145 line = pfile->line;
146 column = 0;
147 }
148 else
149 {
150 line = pfile->cur_token[-1].line;
151 column = pfile->cur_token[-1].col;
152 }
153 }
154 else
155 line = column = 0;
156
157 if (_cpp_begin_message (pfile, level, line, column))
158 v_message (msgid, ap);
159
160 VA_CLOSE (ap);
161 }
162
163 /* Print an error at a specific location. */
164 void
cpp_error_with_line(cpp_reader * pfile,int level,unsigned int line,unsigned int column,const char * msgid,...)165 cpp_error_with_line VPARAMS ((cpp_reader *pfile, int level,
166 unsigned int line, unsigned int column,
167 const char *msgid, ...))
168 {
169 VA_OPEN (ap, msgid);
170 VA_FIXEDARG (ap, cpp_reader *, pfile);
171 VA_FIXEDARG (ap, int, level);
172 VA_FIXEDARG (ap, unsigned int, line);
173 VA_FIXEDARG (ap, unsigned int, column);
174 VA_FIXEDARG (ap, const char *, msgid);
175
176 if (_cpp_begin_message (pfile, level, line, column))
177 v_message (msgid, ap);
178
179 VA_CLOSE (ap);
180 }
181
182 void
cpp_errno(pfile,level,msgid)183 cpp_errno (pfile, level, msgid)
184 cpp_reader *pfile;
185 int level;
186 const char *msgid;
187 {
188 if (msgid[0] == '\0')
189 msgid = _("stdout");
190
191 cpp_error (pfile, level, "%s: %s", msgid, xstrerror (errno));
192 }
193