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/* Default error handlers for CPP Library.

   Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1998, 1999, 2000,

   2001, 2002, 2004 Free Software Foundation, Inc.

   Written by Per Bothner, 1994.

   Based on CCCP program by Paul Rubin, June 1986

   Adapted to ANSI C, Richard Stallman, Jan 1987

This program is free software; you can redistribute it and/or modify it

under the terms of the GNU General Public License as published by the

Free Software Foundation; either version 2, or (at your option) any

later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 In other words, you are welcome to use, share and improve this program.

 You are forbidden to forbid anyone else to use, share and improve

 what you give them.   Help stamp out software-hoarding!  */

#include "config.h"

#include "system.h"

#include "cpplib.h"

#include "internal.h"

static void print_location (cpp_reader *, source_location, unsigned int);

/* Print the logical file location (LINE, COL) in preparation for a

   diagnostic.  Outputs the #include chain if it has changed.  A line

   of zero suppresses the include stack, and outputs the program name

   instead.  */

static void

print_location (cpp_reader *pfile, source_location line, unsigned int col)

{

  if (line == 0)

    fprintf (stderr, "%s: ", progname);

  else

    {

      const struct line_map *map;

      unsigned int lin;

      map = linemap_lookup (pfile->line_table, line);

      linemap_print_containing_files (pfile->line_table, map);

      lin = SOURCE_LINE (map, line);

      if (col == 0)

        {

          col = SOURCE_COLUMN (map, line);

          if (col == 0)

            col = 1;

        }

      if (lin == 0)

        fprintf (stderr, "%s:", map->to_file);

      else if (CPP_OPTION (pfile, show_column) == 0)

        fprintf (stderr, "%s:%u:", map->to_file, lin);

      else

        fprintf (stderr, "%s:%u:%u:", map->to_file, lin, col);

      fputc (' ', stderr);

    }

}

/* Set up for a diagnostic: print the file and line, bump the error

   counter, etc.  SRC_LOC is the logical line number; zero means to print

   at the location of the previously lexed token, which tends to be

   the correct place by default.  The column number can be specified either

   using COLUMN or (if COLUMN==0) extracting SOURCE_COLUMN from SRC_LOC.

   (This may seem redundant, but is useful when pre-scanning (cleaning) a line,

   when we haven't yet verified whether the current line_map has a

   big enough max_column_hint.)

   Returns 0 if the error has been suppressed.  */

int

_cpp_begin_message (cpp_reader *pfile, int code,

                    source_location src_loc, unsigned int column)

{

  int level = CPP_DL_EXTRACT (code);

  switch (level)

    {

    case CPP_DL_WARNING:

    case CPP_DL_PEDWARN:

      if (cpp_in_system_header (pfile)

          && ! CPP_OPTION (pfile, warn_system_headers))

        return 0;

      /* Fall through.  */

    case CPP_DL_WARNING_SYSHDR:

      if (CPP_OPTION (pfile, warnings_are_errors)

          || (level == CPP_DL_PEDWARN && CPP_OPTION (pfile, pedantic_errors)))

        {

          if (CPP_OPTION (pfile, inhibit_errors))

            return 0;

          level = CPP_DL_ERROR;

          pfile->errors++;

        }

      else if (CPP_OPTION (pfile, inhibit_warnings))

        return 0;

      break;

    case CPP_DL_ERROR:

      if (CPP_OPTION (pfile, inhibit_errors))

        return 0;

      /* ICEs cannot be inhibited.  */

    case CPP_DL_ICE:

      pfile->errors++;

      break;

    }

  print_location (pfile, src_loc, column);

  if (CPP_DL_WARNING_P (level))

    fputs (_("warning: "), stderr);

  else if (level == CPP_DL_ICE)

    fputs (_("internal error: "), stderr);

  else

    fputs (_("error: "), stderr);

  return 1;

}

/* Don't remove the blank before do, as otherwise the exgettext

   script will mistake this as a function definition */

#define v_message(msgid, ap) \

 do { vfprintf (stderr, _(msgid), ap); putc ('\n', stderr); } while (0)

/* Exported interface.  */

/* Print an error at the location of the previously lexed token.  */

void

cpp_error (cpp_reader * pfile, int level, const char *msgid, ...)

{

  source_location src_loc;

  va_list ap;

  va_start (ap, msgid);

  if (CPP_OPTION (pfile, client_diagnostic))

    pfile->cb.error (pfile, level, _(msgid), &ap);

  else

    {

      if (CPP_OPTION (pfile, traditional))

        {

          if (pfile->state.in_directive)

            src_loc = pfile->directive_line;

          else

            src_loc = pfile->line_table->highest_line;

        }

      else

        {

          src_loc = pfile->cur_token[-1].src_loc;

        }

      if (_cpp_begin_message (pfile, level, src_loc, 0))

        v_message (msgid, ap);

    }

  va_end (ap);

}

/* Print an error at a specific location.  */

void

cpp_error_with_line (cpp_reader *pfile, int level,

                     source_location src_loc, unsigned int column,

                     const char *msgid, ...)

{

  va_list ap;

  va_start (ap, msgid);

  if (_cpp_begin_message (pfile, level, src_loc, column))

    v_message (msgid, ap);

  va_end (ap);

}

void

cpp_errno (cpp_reader *pfile, int level, const char *msgid)

{

  if (msgid[0] == '\0')

    msgid = _("stdout");

  cpp_error (pfile, level, "%s: %s", msgid, xstrerror (errno));

}