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1028b2bd JB |
1 | /* Implementation of the PAUSE statement. |
2 | Copyright 2002, 2005, 2007, 2009, 2010, 2011 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> |
1028b2bd | 28 | #include <unistd.h> |
6de9cd9a | 29 | |
6de9cd9a DN |
30 | static void |
31 | do_pause (void) | |
32 | { | |
33 | char buff[4]; | |
1028b2bd JB |
34 | estr_write ("To resume execution, type go. " |
35 | "Other input will terminate the job.\n"); | |
6de9cd9a DN |
36 | |
37 | fgets(buff, 4, stdin); | |
38 | if (strncmp(buff, "go\n", 3) != 0) | |
6d1b0f92 | 39 | stop_string ('\0', 0); |
1028b2bd | 40 | estr_write ("RESUMED\n"); |
6de9cd9a DN |
41 | } |
42 | ||
6d1b0f92 | 43 | /* A numeric PAUSE statement. */ |
7d7b8bfe | 44 | |
6d1b0f92 | 45 | extern void pause_numeric (GFC_INTEGER_4); |
7d7b8bfe RH |
46 | export_proto(pause_numeric); |
47 | ||
6de9cd9a DN |
48 | void |
49 | pause_numeric (GFC_INTEGER_4 code) | |
50 | { | |
6d1b0f92 | 51 | st_printf ("PAUSE %d\n", (int) code); |
6de9cd9a DN |
52 | do_pause (); |
53 | } | |
54 | ||
6d1b0f92 JD |
55 | /* A character string or blank PAUSE statement. */ |
56 | ||
7d7b8bfe RH |
57 | extern void pause_string (char *string, GFC_INTEGER_4 len); |
58 | export_proto(pause_string); | |
6de9cd9a DN |
59 | |
60 | void | |
61 | pause_string (char *string, GFC_INTEGER_4 len) | |
62 | { | |
1028b2bd JB |
63 | estr_write ("PAUSE "); |
64 | ssize_t w = write (STDERR_FILENO, string, len); | |
65 | (void) sizeof (w); /* Avoid compiler warning about not using write | |
66 | return val. */ | |
67 | estr_write ("\n"); | |
6de9cd9a DN |
68 | |
69 | do_pause (); | |
70 | } |