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/* Implementation of the STOP statement.
Copyright (C) 2002-2015 Free Software Foundation, Inc.
Contributed by Paul Brook <paul@nowt.org>
This file is part of the GNU Fortran runtime library (libgfortran).
Libgfortran 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.
Libgfortran 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgfortran.h"
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
/* Fortran 2008 demands: If any exception (14) is signaling on that image, the
processor shall issue a warning indicating which exceptions are signaling;
this warning shall be on the unit identified by the named constant
ERROR_UNIT (13.8.2.8). In line with other compilers, we do not report
inexact - and we optionally ignore underflow, cf. thread starting at
http://mailman.j3-fortran.org/pipermail/j3/2013-June/006452.html. */
static void
report_exception (void)
{
int set_excepts;
if (!compile_options.fpe_summary)
return;
set_excepts = get_fpu_except_flags ();
if ((set_excepts & compile_options.fpe_summary) == 0)
return;
estr_write ("Note: The following floating-point exceptions are signalling:");
if ((compile_options.fpe_summary & GFC_FPE_INVALID)
&& (set_excepts & GFC_FPE_INVALID))
estr_write (" IEEE_INVALID_FLAG");
if ((compile_options.fpe_summary & GFC_FPE_ZERO)
&& (set_excepts & GFC_FPE_ZERO))
estr_write (" IEEE_DIVIDE_BY_ZERO");
if ((compile_options.fpe_summary & GFC_FPE_OVERFLOW)
&& (set_excepts & GFC_FPE_OVERFLOW))
estr_write (" IEEE_OVERFLOW_FLAG");
if ((compile_options.fpe_summary & GFC_FPE_UNDERFLOW)
&& (set_excepts & GFC_FPE_UNDERFLOW))
estr_write (" IEEE_UNDERFLOW_FLAG");
if ((compile_options.fpe_summary & GFC_FPE_DENORMAL)
&& (set_excepts & GFC_FPE_DENORMAL))
estr_write (" IEEE_DENORMAL");
if ((compile_options.fpe_summary & GFC_FPE_INEXACT)
&& (set_excepts & GFC_FPE_INEXACT))
estr_write (" IEEE_INEXACT_FLAG");
estr_write ("\n");
}
/* A numeric STOP statement. */
extern _Noreturn void stop_numeric (GFC_INTEGER_4);
export_proto(stop_numeric);
void
stop_numeric (GFC_INTEGER_4 code)
{
report_exception ();
if (code == -1)
code = 0;
else
st_printf ("STOP %d\n", (int)code);
exit (code);
}
/* A Fortran 2008 numeric STOP statement. */
extern _Noreturn void stop_numeric_f08 (GFC_INTEGER_4);
export_proto(stop_numeric_f08);
void
stop_numeric_f08 (GFC_INTEGER_4 code)
{
report_exception ();
st_printf ("STOP %d\n", (int)code);
exit (code);
}
/* A character string or blank STOP statement. */
void
stop_string (const char *string, GFC_INTEGER_4 len)
{
report_exception ();
if (string)
{
estr_write ("STOP ");
(void) write (STDERR_FILENO, string, len);
estr_write ("\n");
}
exit (0);
}
/* Per Fortran 2008, section 8.4: "Execution of a STOP statement initiates
normal termination of execution. Execution of an ERROR STOP statement
initiates error termination of execution." Thus, error_stop_string returns
a nonzero exit status code. */
extern _Noreturn void error_stop_string (const char *, GFC_INTEGER_4);
export_proto(error_stop_string);
void
error_stop_string (const char *string, GFC_INTEGER_4 len)
{
report_exception ();
estr_write ("ERROR STOP ");
(void) write (STDERR_FILENO, string, len);
estr_write ("\n");
exit (1);
}
/* A numeric ERROR STOP statement. */
extern _Noreturn void error_stop_numeric (GFC_INTEGER_4);
export_proto(error_stop_numeric);
void
error_stop_numeric (GFC_INTEGER_4 code)
{
report_exception ();
st_printf ("ERROR STOP %d\n", (int) code);
exit (code);
}
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