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/* Implementation of the PAUSE statement.
Copyright (C) 2002-2022 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 <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
static void
do_pause (void)
{
char buff[4];
estr_write ("To resume execution, type go. "
"Other input will terminate the job.\n");
fgets(buff, 4, stdin);
if (strncmp(buff, "go\n", 3) != 0)
stop_string ('\0', 0, false);
estr_write ("RESUMED\n");
}
/* A numeric PAUSE statement. */
extern void pause_numeric (GFC_INTEGER_8);
export_proto(pause_numeric);
void
pause_numeric (GFC_INTEGER_8 code)
{
st_printf ("PAUSE %ld\n", (long) code);
do_pause ();
}
/* A character string or blank PAUSE statement. */
extern void pause_string (char *string, size_t len);
export_proto(pause_string);
void
pause_string (char *string, size_t len)
{
struct iovec iov[3];
iov[0].iov_base = (char*) "PAUSE ";
iov[0].iov_len = strlen (iov[0].iov_base);
iov[1].iov_base = string;
iov[1].iov_len = len;
iov[2].iov_base = (char*) "\n";
iov[2].iov_len = 1;
estr_writev (iov, 3);
do_pause ();
}
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