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/* Declaration for error-reporting function for Bison.
Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006, 2009, 2010 Free
Software Foundation, Inc.
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 3 of the License, 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, see <http://www.gnu.org/licenses/>. */
/* Based on error.c and error.h,
written by David MacKenzie <djm@gnu.ai.mit.edu>. */
#include <config.h>
#include "system.h"
#include <stdarg.h>
#include "complain.h"
#include "files.h"
#include "getargs.h"
bool complaint_issued;
static unsigned *indent_ptr = 0;
/** Report an error message.
*
* \param loc the location, defaulting to the current file,
* or the program name.
* \param prefix put before the message (e.g., "warning").
* \param message the error message, a printf format string.
* \param args the arguments of the format string.
*/
static
void
error_message (location *loc,
const char *prefix,
const char *message, va_list args)
{
unsigned pos = 0;
if (loc)
pos += location_print (stderr, *loc);
else
pos += fprintf(stderr, "%s", current_file ? current_file : program_name);
pos += fprintf(stderr, ": ");
if (indent_ptr)
{
if (!*indent_ptr)
*indent_ptr = pos;
else if (*indent_ptr > pos)
fprintf (stderr, "%*s", *indent_ptr - pos, "");
indent_ptr = 0;
}
if (prefix)
fprintf (stderr, "%s: ", prefix);
vfprintf (stderr, message, args);
putc ('\n', stderr);
fflush (stderr);
}
/** Wrap error_message() with varargs handling. */
#define ERROR_MESSAGE(Loc, Prefix, Message) \
{ \
va_list args; \
va_start (args, Message); \
error_message (Loc, Prefix, Message, args); \
va_end (args); \
}
/*--------------------------------.
| Report a warning, and proceed. |
`--------------------------------*/
static void
set_warning_issued (void)
{
static bool warning_issued = false;
if (!warning_issued && (warnings_flag & warnings_error))
{
fprintf (stderr, "%s: warnings being treated as errors\n", program_name);
complaint_issued = true;
}
warning_issued = true;
}
void
warn_at (location loc, const char *message, ...)
{
set_warning_issued ();
ERROR_MESSAGE (&loc, _("warning"), message);
}
void
warn_at_indent (location loc, unsigned *indent,
const char *message, ...)
{
set_warning_issued ();
indent_ptr = indent;
ERROR_MESSAGE (&loc, _("warning"), message);
}
void
warn (const char *message, ...)
{
set_warning_issued ();
ERROR_MESSAGE (NULL, _("warning"), message);
}
/*-----------------------------------------------------------.
| An error has occurred, but we can proceed, and die later. |
`-----------------------------------------------------------*/
void
complain_at (location loc, const char *message, ...)
{
ERROR_MESSAGE (&loc, NULL, message);
complaint_issued = true;
}
void
complain_at_indent (location loc, unsigned *indent,
const char *message, ...)
{
indent_ptr = indent;
ERROR_MESSAGE (&loc, NULL, message);
complaint_issued = true;
}
void
complain (const char *message, ...)
{
ERROR_MESSAGE (NULL, NULL, message);
complaint_issued = true;
}
/*--------------------------------------------------------------.
| An incompatibility with POSIX Yacc: mapped either to warn* or |
| complain* depending on yacc_flag. |
`--------------------------------------------------------------*/
void
yacc_at (location loc, const char *message, ...)
{
if (yacc_flag)
{
ERROR_MESSAGE (&loc, NULL, message);
complaint_issued = true;
}
else if (warnings_flag & warnings_yacc)
{
set_warning_issued ();
ERROR_MESSAGE (&loc, _("warning"), message);
}
}
/*-------------------------------------------------.
| A severe error has occurred, we cannot proceed. |
`-------------------------------------------------*/
void
fatal_at (location loc, const char *message, ...)
{
ERROR_MESSAGE (&loc, _("fatal error"), message);
exit (EXIT_FAILURE);
}
void
fatal (const char *message, ...)
{
ERROR_MESSAGE (NULL, _("fatal error"), message);
exit (EXIT_FAILURE);
}
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