1 /* A stupid little spinning wheel designed to make it look like useful work
2 is being done.
3
4 Copyright 1999-2001 Free Software Foundation, Inc.
5
6 This file is part of the GNU MP Library test suite.
7
8 The GNU MP Library test suite is free software; you can redistribute it
9 and/or modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 3 of the License,
11 or (at your option) any later version.
12
13 The GNU MP Library test suite is distributed in the hope that it will be
14 useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
16 Public License for more details.
17
18 You should have received a copy of the GNU General Public License along with
19 the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
20
21 #include "config.h"
22
23 #include <signal.h>
24 #include <stdio.h>
25 #include <stdlib.h>
26 #if HAVE_UNISTD_H
27 #include <unistd.h> /* for isatty */
28 #endif
29
30 #include "gmp-impl.h"
31
32 #include "tests.h"
33
34
35 /* "alarm" is not available on mingw32, and the SIGALRM constant is not
36 defined. Don't bother with a spinner in this case. */
37 #if ! HAVE_ALARM || ! defined (SIGALRM)
38 #define alarm(n) abort()
39 #define signal(sig,func) SIG_ERR
40 #endif
41
42
43 /* An application can update this to get a count printed with the spinner.
44 If left at 0, no count is printed. */
45
46 unsigned long spinner_count = 0;
47
48
49 int spinner_wanted = -1; /* -1 uninitialized, 1 wanted, 0 not */
50 int spinner_tick = 1; /* 1 ready to print, 0 not */
51
52
53 /*ARGSUSED*/
54 RETSIGTYPE
spinner_signal(int signum)55 spinner_signal (int signum)
56 {
57 spinner_tick = 1;
58
59 if (signal (SIGALRM, spinner_signal) == SIG_ERR)
60 {
61 printf ("spinner_signal(): Oops, cannot reinstall SIGALRM\n");
62 abort ();
63 }
64 alarm (1);
65 }
66
67
68 /* Initialize the spinner.
69
70 This is done the first time spinner() is called, so an application
71 doesn't need to call this directly.
72
73 The spinner is only wanted if the output is a tty. */
74
75 #define SPINNER_WANTED_INIT() \
76 if (spinner_wanted < 0) spinner_init ()
77
78 void
spinner_init(void)79 spinner_init (void)
80 {
81 spinner_wanted = isatty (STDOUT_FILENO);
82 if (spinner_wanted == -1)
83 abort ();
84
85 if (!spinner_wanted)
86 return;
87
88 if (signal (SIGALRM, spinner_signal) == SIG_ERR)
89 {
90 printf ("(no spinner)\r");
91 spinner_tick = 0;
92 return;
93 }
94 alarm (1);
95
96 /* unbuffered output so the spinner will show up */
97 setbuf (stdout, NULL);
98 }
99
100
101 void
spinner(void)102 spinner (void)
103 {
104 static const char data[] = { '|', '/', '-', '\\' };
105 static int pos = 0;
106
107 char buf[128];
108
109 SPINNER_WANTED_INIT ();
110
111 if (spinner_tick)
112 {
113 buf[0] = data[pos];
114 pos = (pos + 1) % numberof (data);
115 spinner_tick = 0;
116
117 if (spinner_count != 0)
118 {
119 sprintf (buf+1, " %lu\r", spinner_count);
120 }
121 else
122 {
123 buf[1] = '\r';
124 buf[2] = '\0';
125 }
126 fputs (buf, stdout);
127 }
128 }
129