gcc/cpperror.c

   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
  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
  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           pfile->errors++;
  96         }
  97       else if (CPP_OPTION (pfile, inhibit_warnings))
  98         return 0;
  99       break;
 100
 101     case DL_ERROR:
 102       if (CPP_OPTION (pfile, inhibit_errors))
 103         return 0;
 104       /* ICEs cannot be inhibited.  */
 105     case DL_ICE:
 106       pfile->errors++;
 107       break;
 108     }
 109
 110   print_location (pfile, line, column);
 111   if (DL_WARNING_P (level))
 112     fputs (_("warning: "), stderr);
 113   else if (level == DL_ICE)
 114     fputs (_("internal error: "), stderr);
 115
 116   return 1;
 117 }
 118
 119 /* Don't remove the blank before do, as otherwise the exgettext
 120    script will mistake this as a function definition */
 121 #define v_message(msgid, ap) \
 122  do { vfprintf (stderr, _(msgid), ap); putc ('\n', stderr); } while (0)
 123
 124 /* Exported interface.  */
 125
 126 /* Print an error at the location of the previously lexed token.  */
 127 void
 128 cpp_error VPARAMS ((cpp_reader * pfile, int level, const char *msgid, ...))
 129 {
 130   unsigned int line, column;
 131
 132   VA_OPEN (ap, msgid);
 133   VA_FIXEDARG (ap, cpp_reader *, pfile);
 134   VA_FIXEDARG (ap, int, level);
 135   VA_FIXEDARG (ap, const char *, msgid);
 136
 137   if (pfile->buffer)
 138     {
 139       line = pfile->cur_token[-1].line;
 140       column = pfile->cur_token[-1].col;
 141     }
 142   else
 143     line = column = 0;
 144
 145   if (_cpp_begin_message (pfile, level, line, column))
 146     v_message (msgid, ap);
 147
 148   VA_CLOSE (ap);
 149 }
 150
 151 /* Print an error at a specific location.  */
 152 void
 153 cpp_error_with_line VPARAMS ((cpp_reader *pfile, int level,
 154                               unsigned int line, unsigned int column,
 155                               const char *msgid, ...))
 156 {
 157   VA_OPEN (ap, msgid);
 158   VA_FIXEDARG (ap, cpp_reader *, pfile);
 159   VA_FIXEDARG (ap, int, level);
 160   VA_FIXEDARG (ap, unsigned int, line);
 161   VA_FIXEDARG (ap, unsigned int, column);
 162   VA_FIXEDARG (ap, const char *, msgid);
 163
 164   if (_cpp_begin_message (pfile, level, line, column))
 165     v_message (msgid, ap);
 166
 167   VA_CLOSE (ap);
 168 }
 169
 170 void
 171 cpp_errno (pfile, level, msgid)
 172      cpp_reader *pfile;
 173      int level;
 174      const char *msgid;
 175 {
 176   if (msgid[0] == '\0')
 177     msgid = _("stdout");
 178
 179   cpp_error (pfile, level, "%s: %s", msgid, xstrerror (errno));
 180 }