1 /* Default error handlers for CPP Library. 2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 3 2001, 2002, 2004 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 "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 unsigned int 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 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 else 155 { 156 /* Find actual previous token. */ 157 cpp_token *t; 158 159 if (pfile->cur_token != pfile->cur_run->base) 160 t = pfile->cur_token - 1; 161 else 162 { 163 if (pfile->cur_run->prev != NULL) 164 t = pfile->cur_run->prev->limit; 165 else 166 t = NULL; 167 } 168 /* Retrieve corresponding source location, unless we failed. */ 169 src_loc = t ? t->src_loc : 0; 170 } 171 172 if (_cpp_begin_message (pfile, level, src_loc, 0)) 173 v_message (msgid, ap); 174 } 175 176 va_end (ap); 177 } 178 179 /* Print an error at a specific location. */ 180 void 181 cpp_error_with_line (cpp_reader *pfile, int level, 182 source_location src_loc, unsigned int column, 183 const char *msgid, ...) 184 { 185 va_list ap; 186 187 va_start (ap, msgid); 188 189 if (_cpp_begin_message (pfile, level, src_loc, column)) 190 v_message (msgid, ap); 191 192 va_end (ap); 193 } 194 195 void 196 cpp_errno (cpp_reader *pfile, int level, const char *msgid) 197 { 198 if (msgid[0] == '\0') 199 msgid = _("stdout"); 200 201 cpp_error (pfile, level, "%s: %s", msgid, xstrerror (errno)); 202 } 203