Imported gcc-4.4.3

[msp430-gcc.git] / gmp / tests / spinner.c

diff --git a/gmp/tests/spinner.c b/gmp/tests/spinner.c
new file mode 100644 (file)
index 0000000..343ecb5
--- /dev/null
+++ b/gmp/tests/spinner.c
@@ -0,0 +1,129 @@
+/* A stupid little spinning wheel designed to make it look like useful work
+   is being done.
+
+Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser 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 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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MP Library.  If not, see http://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.h"
+#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 (fileno (stdout));
+  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);
+
+  /* unbufferred 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);
+    }
+}