Viewing file:  spinner.c (2.85 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* A stupid little spinning wheel designed to make it look like useful work
is being done.
Copyright 1999-2001 Free Software Foundation, Inc.
This file is part of the GNU MP Library test suite.
The GNU MP Library test suite 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.
The GNU MP Library test suite 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.
You should have received a copy of the GNU General Public License along with
the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
#include "config.h"
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#if HAVE_UNISTD_H
#include <unistd.h> /* for isatty */
#endif
#include "gmp-impl.h"
#include "tests.h"
/* "alarm" is not available on mingw32, and the SIGALRM constant is not
defined. Don't bother with a spinner in this case. */
#if ! HAVE_ALARM || ! defined (SIGALRM)
#define alarm(n) abort()
#define signal(sig,func) SIG_ERR
#endif
/* An application can update this to get a count printed with the spinner.
If left at 0, no count is printed. */
unsigned long spinner_count = 0;
int spinner_wanted = -1; /* -1 uninitialized, 1 wanted, 0 not */
int spinner_tick = 1; /* 1 ready to print, 0 not */
/*ARGSUSED*/
RETSIGTYPE
spinner_signal (int signum)
{
spinner_tick = 1;
if (signal (SIGALRM, spinner_signal) == SIG_ERR)
{
printf ("spinner_signal(): Oops, cannot reinstall SIGALRM\n");
abort ();
}
alarm (1);
}
/* Initialize the spinner.
This is done the first time spinner() is called, so an application
doesn't need to call this directly.
The spinner is only wanted if the output is a tty. */
#define SPINNER_WANTED_INIT() \
if (spinner_wanted < 0) spinner_init ()
void
spinner_init (void)
{
spinner_wanted = isatty (STDOUT_FILENO);
if (spinner_wanted == -1)
abort ();
if (!spinner_wanted)
return;
if (signal (SIGALRM, spinner_signal) == SIG_ERR)
{
printf ("(no spinner)\r");
spinner_tick = 0;
return;
}
alarm (1);
/* unbuffered output so the spinner will show up */
setbuf (stdout, NULL);
}
void
spinner (void)
{
static const char data[] = { '|', '/', '-', '\\' };
static int pos = 0;
char buf[128];
SPINNER_WANTED_INIT ();
if (spinner_tick)
{
buf[0] = data[pos];
pos = (pos + 1) % numberof (data);
spinner_tick = 0;
if (spinner_count != 0)
{
sprintf (buf+1, " %lu\r", spinner_count);
}
else
{
buf[1] = '\r';
buf[2] = '\0';
}
fputs (buf, stdout);
}
}
|
