144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
/* Implementation of the STOP statement.
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Copyright (C) 2002-2017 Free Software Foundation, Inc.
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Contributed by Paul Brook <paul@nowt.org>
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This file is part of the GNU Fortran runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libgfortran.h"
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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/* Fortran 2008 demands: If any exception (14) is signaling on that image, the
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processor shall issue a warning indicating which exceptions are signaling;
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this warning shall be on the unit identified by the named constant
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ERROR_UNIT (13.8.2.8). In line with other compilers, we do not report
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inexact - and we optionally ignore underflow, cf. thread starting at
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http://mailman.j3-fortran.org/pipermail/j3/2013-June/006452.html. */
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static void
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report_exception (void)
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{
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int set_excepts;
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if (!compile_options.fpe_summary)
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return;
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set_excepts = get_fpu_except_flags ();
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if ((set_excepts & compile_options.fpe_summary) == 0)
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return;
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estr_write ("Note: The following floating-point exceptions are signalling:");
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if ((compile_options.fpe_summary & GFC_FPE_INVALID)
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&& (set_excepts & GFC_FPE_INVALID))
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estr_write (" IEEE_INVALID_FLAG");
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if ((compile_options.fpe_summary & GFC_FPE_ZERO)
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&& (set_excepts & GFC_FPE_ZERO))
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estr_write (" IEEE_DIVIDE_BY_ZERO");
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if ((compile_options.fpe_summary & GFC_FPE_OVERFLOW)
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&& (set_excepts & GFC_FPE_OVERFLOW))
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estr_write (" IEEE_OVERFLOW_FLAG");
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if ((compile_options.fpe_summary & GFC_FPE_UNDERFLOW)
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&& (set_excepts & GFC_FPE_UNDERFLOW))
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estr_write (" IEEE_UNDERFLOW_FLAG");
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if ((compile_options.fpe_summary & GFC_FPE_DENORMAL)
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&& (set_excepts & GFC_FPE_DENORMAL))
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estr_write (" IEEE_DENORMAL");
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if ((compile_options.fpe_summary & GFC_FPE_INEXACT)
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&& (set_excepts & GFC_FPE_INEXACT))
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estr_write (" IEEE_INEXACT_FLAG");
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estr_write ("\n");
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}
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/* A numeric STOP statement. */
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extern _Noreturn void stop_numeric (GFC_INTEGER_4);
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export_proto(stop_numeric);
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void
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stop_numeric (GFC_INTEGER_4 code)
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{
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report_exception ();
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st_printf ("STOP %d\n", (int)code);
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exit (code);
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}
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/* A character string or blank STOP statement. */
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void
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stop_string (const char *string, GFC_INTEGER_4 len)
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{
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report_exception ();
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if (string)
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{
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estr_write ("STOP ");
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(void) write (STDERR_FILENO, string, len);
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estr_write ("\n");
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}
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exit (0);
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}
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/* Per Fortran 2008, section 8.4: "Execution of a STOP statement initiates
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normal termination of execution. Execution of an ERROR STOP statement
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initiates error termination of execution." Thus, error_stop_string returns
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a nonzero exit status code. */
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extern _Noreturn void error_stop_string (const char *, GFC_INTEGER_4);
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export_proto(error_stop_string);
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void
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error_stop_string (const char *string, GFC_INTEGER_4 len)
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{
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report_exception ();
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estr_write ("ERROR STOP ");
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(void) write (STDERR_FILENO, string, len);
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estr_write ("\n");
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exit_error (1);
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}
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/* A numeric ERROR STOP statement. */
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extern _Noreturn void error_stop_numeric (GFC_INTEGER_4);
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export_proto(error_stop_numeric);
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void
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error_stop_numeric (GFC_INTEGER_4 code)
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{
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report_exception ();
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st_printf ("ERROR STOP %d\n", (int) code);
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exit_error (code);
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}
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