75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/* Implementation of the PAUSE statement.
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Copyright (C) 2002-2018 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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#include <string.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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static void
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do_pause (void)
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{
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char buff[4];
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estr_write ("To resume execution, type go. "
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"Other input will terminate the job.\n");
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fgets(buff, 4, stdin);
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if (strncmp(buff, "go\n", 3) != 0)
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stop_string ('\0', 0);
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estr_write ("RESUMED\n");
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}
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/* A numeric PAUSE statement. */
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extern void pause_numeric (GFC_INTEGER_4);
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export_proto(pause_numeric);
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void
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pause_numeric (GFC_INTEGER_4 code)
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{
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st_printf ("PAUSE %d\n", (int) code);
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do_pause ();
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}
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/* A character string or blank PAUSE statement. */
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extern void pause_string (char *string, GFC_INTEGER_4 len);
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export_proto(pause_string);
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void
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pause_string (char *string, GFC_INTEGER_4 len)
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{
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estr_write ("PAUSE ");
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ssize_t w = write (STDERR_FILENO, string, len);
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(void) sizeof (w); /* Avoid compiler warning about not using write
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return val. */
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estr_write ("\n");
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do_pause ();
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}
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