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comparison libcpp/errors.c @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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children 77e2b8dfacca
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-1:000000000000 0:a06113de4d67
1 /* Default error handlers for CPP Library.
2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1998, 1999, 2000,
3 2001, 2002, 2004, 2008, 2009 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 3, 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; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>.
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 "internal.h"
30
31 static void print_location (cpp_reader *, source_location, unsigned int);
32
33 /* Print the logical file location (LINE, COL) in preparation for a
34 diagnostic. Outputs the #include chain if it has changed. A line
35 of zero suppresses the include stack, and outputs the program name
36 instead. */
37 static void
38 print_location (cpp_reader *pfile, source_location line, unsigned int col)
39 {
40 if (line == 0)
41 fprintf (stderr, "%s: ", progname);
42 else
43 {
44 const struct line_map *map;
45 linenum_type lin;
46
47 map = linemap_lookup (pfile->line_table, line);
48 linemap_print_containing_files (pfile->line_table, map);
49
50 lin = SOURCE_LINE (map, line);
51 if (col == 0)
52 {
53 col = SOURCE_COLUMN (map, line);
54 if (col == 0)
55 col = 1;
56 }
57
58 if (lin == 0)
59 fprintf (stderr, "%s:", map->to_file);
60 else if (CPP_OPTION (pfile, show_column) == 0)
61 fprintf (stderr, "%s:%u:", map->to_file, lin);
62 else
63 fprintf (stderr, "%s:%u:%u:", map->to_file, lin, col);
64
65 fputc (' ', stderr);
66 }
67 }
68
69 /* Set up for a diagnostic: print the file and line, bump the error
70 counter, etc. SRC_LOC is the logical line number; zero means to print
71 at the location of the previously lexed token, which tends to be
72 the correct place by default. The column number can be specified either
73 using COLUMN or (if COLUMN==0) extracting SOURCE_COLUMN from SRC_LOC.
74 (This may seem redundant, but is useful when pre-scanning (cleaning) a line,
75 when we haven't yet verified whether the current line_map has a
76 big enough max_column_hint.)
77
78 Returns 0 if the error has been suppressed. */
79 static int
80 _cpp_begin_message (cpp_reader *pfile, int code,
81 source_location src_loc, unsigned int column)
82 {
83 int level = CPP_DL_EXTRACT (code);
84
85 switch (level)
86 {
87 case CPP_DL_WARNING:
88 case CPP_DL_PEDWARN:
89 if (cpp_in_system_header (pfile)
90 && ! CPP_OPTION (pfile, warn_system_headers))
91 return 0;
92 /* Fall through. */
93
94 case CPP_DL_WARNING_SYSHDR:
95 if (CPP_OPTION (pfile, warnings_are_errors)
96 || (level == CPP_DL_PEDWARN && CPP_OPTION (pfile, pedantic_errors)))
97 {
98 if (CPP_OPTION (pfile, inhibit_errors))
99 return 0;
100 level = CPP_DL_ERROR;
101 pfile->errors++;
102 }
103 else if (CPP_OPTION (pfile, inhibit_warnings))
104 return 0;
105 break;
106
107 case CPP_DL_ERROR:
108 if (CPP_OPTION (pfile, inhibit_errors))
109 return 0;
110 /* ICEs cannot be inhibited. */
111 case CPP_DL_ICE:
112 pfile->errors++;
113 break;
114 }
115
116 print_location (pfile, src_loc, column);
117 if (CPP_DL_WARNING_P (level))
118 fputs (_("warning: "), stderr);
119 else if (level == CPP_DL_ICE)
120 fputs (_("internal error: "), stderr);
121 else
122 fputs (_("error: "), stderr);
123
124 return 1;
125 }
126
127 /* Don't remove the blank before do, as otherwise the exgettext
128 script will mistake this as a function definition */
129 #define v_message(msgid, ap) \
130 do { vfprintf (stderr, _(msgid), ap); putc ('\n', stderr); } while (0)
131
132 /* Exported interface. */
133
134 /* Print an error at the location of the previously lexed token. */
135 void
136 cpp_error (cpp_reader * pfile, int level, const char *msgid, ...)
137 {
138 source_location src_loc;
139 va_list ap;
140
141 va_start (ap, msgid);
142
143 if (CPP_OPTION (pfile, client_diagnostic))
144 pfile->cb.error (pfile, level, _(msgid), &ap);
145 else
146 {
147 if (CPP_OPTION (pfile, traditional))
148 {
149 if (pfile->state.in_directive)
150 src_loc = pfile->directive_line;
151 else
152 src_loc = pfile->line_table->highest_line;
153 }
154 /* We don't want to refer to a token before the beginning of the
155 current run -- that is invalid. */
156 else if (pfile->cur_token == pfile->cur_run->base)
157 {
158 if (pfile->cur_run->prev != NULL)
159 src_loc = pfile->cur_run->prev->limit->src_loc;
160 else
161 src_loc = 0;
162 }
163 else
164 {
165 src_loc = pfile->cur_token[-1].src_loc;
166 }
167
168 if (_cpp_begin_message (pfile, level, src_loc, 0))
169 v_message (msgid, ap);
170 }
171
172 va_end (ap);
173 }
174
175 /* Print an error at a specific location. */
176 void
177 cpp_error_with_line (cpp_reader *pfile, int level,
178 source_location src_loc, unsigned int column,
179 const char *msgid, ...)
180 {
181 va_list ap;
182
183 va_start (ap, msgid);
184
185 if (_cpp_begin_message (pfile, level, src_loc, column))
186 v_message (msgid, ap);
187
188 va_end (ap);
189 }
190
191 void
192 cpp_errno (cpp_reader *pfile, int level, const char *msgid)
193 {
194 if (msgid[0] == '\0')
195 msgid = _("stdout");
196
197 cpp_error (pfile, level, "%s: %s", msgid, xstrerror (errno));
198 }