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1028b2bd | 1 | /* Implementation of the PAUSE statement. |
85ec4feb | 2 | Copyright (C) 2002-2018 Free Software Foundation, Inc. |
6de9cd9a DN |
3 | Contributed by Paul Brook <paul@nowt.org> |
4 | ||
1028b2bd | 5 | This file is part of the GNU Fortran runtime library (libgfortran). |
6de9cd9a | 6 | |
57dea9f6 TM |
7 | Libgfortran is free software; you can redistribute it and/or |
8 | modify it under the terms of the GNU General Public | |
6de9cd9a | 9 | License as published by the Free Software Foundation; either |
748086b7 | 10 | version 3 of the License, or (at your option) any later version. |
57dea9f6 TM |
11 | |
12 | Libgfortran is distributed in the hope that it will be useful, | |
6de9cd9a DN |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
57dea9f6 | 15 | GNU General Public License for more details. |
6de9cd9a | 16 | |
748086b7 JJ |
17 | Under Section 7 of GPL version 3, you are granted additional |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 25 | |
36ae8a61 | 26 | #include "libgfortran.h" |
6de9cd9a | 27 | #include <string.h> |
19f0e98f DE |
28 | |
29 | #ifdef HAVE_UNISTD_H | |
1028b2bd | 30 | #include <unistd.h> |
19f0e98f DE |
31 | #endif |
32 | ||
6de9cd9a | 33 | |
6de9cd9a DN |
34 | static void |
35 | do_pause (void) | |
36 | { | |
37 | char buff[4]; | |
1028b2bd JB |
38 | estr_write ("To resume execution, type go. " |
39 | "Other input will terminate the job.\n"); | |
6de9cd9a DN |
40 | |
41 | fgets(buff, 4, stdin); | |
42 | if (strncmp(buff, "go\n", 3) != 0) | |
6d1b0f92 | 43 | stop_string ('\0', 0); |
1028b2bd | 44 | estr_write ("RESUMED\n"); |
6de9cd9a DN |
45 | } |
46 | ||
6d1b0f92 | 47 | /* A numeric PAUSE statement. */ |
7d7b8bfe | 48 | |
6cc22cf4 | 49 | extern void pause_numeric (GFC_INTEGER_8); |
7d7b8bfe RH |
50 | export_proto(pause_numeric); |
51 | ||
6de9cd9a | 52 | void |
6cc22cf4 | 53 | pause_numeric (GFC_INTEGER_8 code) |
6de9cd9a | 54 | { |
6cc22cf4 | 55 | st_printf ("PAUSE %ld\n", (long) code); |
6de9cd9a DN |
56 | do_pause (); |
57 | } | |
58 | ||
6d1b0f92 JD |
59 | /* A character string or blank PAUSE statement. */ |
60 | ||
6cc22cf4 | 61 | extern void pause_string (char *string, size_t len); |
7d7b8bfe | 62 | export_proto(pause_string); |
6de9cd9a DN |
63 | |
64 | void | |
6cc22cf4 | 65 | pause_string (char *string, size_t len) |
6de9cd9a | 66 | { |
1028b2bd JB |
67 | estr_write ("PAUSE "); |
68 | ssize_t w = write (STDERR_FILENO, string, len); | |
69 | (void) sizeof (w); /* Avoid compiler warning about not using write | |
70 | return val. */ | |
71 | estr_write ("\n"); | |
6de9cd9a DN |
72 | |
73 | do_pause (); | |
74 | } |