libcpp/errors.c

   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 /* Print an error at the location of the previously lexed token.  */
  32 bool
  33 cpp_error (cpp_reader * pfile, int level, const char *msgid, ...)
  34 {
  35   source_location src_loc;
  36   va_list ap;
  37   bool ret;
  38
  39   va_start (ap, msgid);
  40
  41   if (CPP_OPTION (pfile, traditional))
  42     {
  43       if (pfile->state.in_directive)
  44         src_loc = pfile->directive_line;
  45       else
  46         src_loc = pfile->line_table->highest_line;
  47     }
  48   /* We don't want to refer to a token before the beginning of the
  49      current run -- that is invalid.  */
  50   else if (pfile->cur_token == pfile->cur_run->base)
  51     {
  52       if (pfile->cur_run->prev != NULL)
  53         src_loc = pfile->cur_run->prev->limit->src_loc;
  54       else
  55         src_loc = 0;
  56     }
  57   else
  58     {
  59       src_loc = pfile->cur_token[-1].src_loc;
  60     }
  61
  62   if (!pfile->cb.error)
  63     abort ();
  64   ret = pfile->cb.error (pfile, level, src_loc, 0, _(msgid), &ap);
  65
  66   va_end (ap);
  67   return ret;
  68 }
  69
  70 /* Print an error at a specific location.  */
  71 bool
  72 cpp_error_with_line (cpp_reader *pfile, int level,
  73                      source_location src_loc, unsigned int column,
  74                      const char *msgid, ...)
  75 {
  76   va_list ap;
  77   bool ret;
  78
  79   va_start (ap, msgid);
  80
  81   if (!pfile->cb.error)
  82     abort ();
  83   ret = pfile->cb.error (pfile, level, src_loc, column, _(msgid), &ap);
  84
  85   va_end (ap);
  86   return ret;
  87 }
  88
  89 bool
  90 cpp_errno (cpp_reader *pfile, int level, const char *msgid)
  91 {
  92   if (msgid[0] == '\0')
  93     msgid = _("stdout");
  94
  95   return cpp_error (pfile, level, "%s: %s", msgid, xstrerror (errno));
  96 }