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Annotation of OpenXM_contrib/gmp/mpn/tests/spinner.c, Revision 1.1

1.1     ! maekawa     1: /* A stupid little spinning wheel designed to make it look like useful work
        !             2:    is being done.  */
        !             3:
        !             4: /*
        !             5: Copyright (C) 1999, 2000 Free Software Foundation, Inc.
        !             6:
        !             7: This file is part of the GNU MP Library.
        !             8:
        !             9: The GNU MP Library is free software; you can redistribute it and/or modify
        !            10: it under the terms of the GNU Lesser General Public License as published by
        !            11: the Free Software Foundation; either version 2.1 of the License, or (at your
        !            12: option) any later version.
        !            13:
        !            14: The GNU MP Library is distributed in the hope that it will be useful, but
        !            15: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            16: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
        !            17: License for more details.
        !            18:
        !            19: You should have received a copy of the GNU Lesser General Public License
        !            20: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            21: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            22: MA 02111-1307, USA.
        !            23: */
        !            24:
        !            25: #include "config.h"
        !            26:
        !            27: #include <signal.h>
        !            28: #include <stdio.h>
        !            29: #if HAVE_UNISTD_H
        !            30: #include <unistd.h>     /* for isatty */
        !            31: #endif
        !            32:
        !            33: #include "gmp.h"
        !            34: #include "gmp-impl.h"
        !            35:
        !            36: #include "try.h"
        !            37:
        !            38:
        !            39: /* An application can update this to get a count printed with the spinner.
        !            40:    If left at 0, no count is printed. */
        !            41:
        !            42: unsigned long  spinner_count = 0;
        !            43:
        !            44:
        !            45: static int  spinner_wanted = -1;  /* -1 uninitialized, 1 wanted, 0 not */
        !            46: static int  spinner_tick = 1;     /* 1 ready to print, 0 not */
        !            47:
        !            48:
        !            49: /*ARGSUSED*/
        !            50: void
        !            51: spinner_signal (int signum)
        !            52: {
        !            53:   spinner_tick = 1;
        !            54:
        !            55:   if (signal (SIGALRM, spinner_signal) == SIG_ERR)  abort ();
        !            56:   alarm (1);
        !            57: }
        !            58:
        !            59:
        !            60: /* Initialize the spinner.
        !            61:
        !            62:    This is done the first time spinner() is called, so an application
        !            63:    doesn't need to call this directly.
        !            64:
        !            65:    The spinner is only wanted if the output is a tty.  */
        !            66:
        !            67: #define SPINNER_WANTED_INIT() \
        !            68:   if (spinner_wanted < 0) spinner_init ()
        !            69:
        !            70: void
        !            71: spinner_init (void)
        !            72: {
        !            73:   spinner_wanted = isatty (fileno (stdout));
        !            74:   if (spinner_wanted == -1)
        !            75:     abort ();
        !            76:
        !            77:   if (!spinner_wanted)
        !            78:     return;
        !            79:
        !            80:   if (signal (SIGALRM, spinner_signal) == SIG_ERR)  abort ();
        !            81:   alarm (1);
        !            82: }
        !            83:
        !            84:
        !            85: void
        !            86: spinner (void)
        !            87: {
        !            88:   static const char  data[] = { '|', '/', '-', '\\' };
        !            89:   static int         pos = 0;
        !            90:
        !            91:   char  buf[128];
        !            92:
        !            93:   SPINNER_WANTED_INIT ();
        !            94:
        !            95:   if (spinner_tick)
        !            96:     {
        !            97:       buf[0] = data[pos];
        !            98:       pos = (pos + 1) % numberof (data);
        !            99:       spinner_tick = 0;
        !           100:
        !           101:       if (spinner_count != 0)
        !           102:         {
        !           103:           sprintf (buf+1, " %lu\r", spinner_count);
        !           104:         }
        !           105:       else
        !           106:         {
        !           107:           buf[1] = '\r';
        !           108:           buf[2] = '\0';
        !           109:         }
        !           110:       fputs (buf, stdout);
        !           111:     }
        !           112: }