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utilsubs.c

/*
 *   Copyright (c) International Business Machines Corp., 2000-2002
 *
 *   This program 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 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program 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 this program;  if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "jfs_types.h"
#include "utilsubs.h"

/*
 *    log2shift()
 */
int32_t log2shift(uint32_t n)
{
      uint32_t shift = 0;

      while (n > 1) {
            /* n is not power of 2 */
            if (n & 1)
                  return -1;

            shift++;
            n >>= 1;
      }

      return shift;
}

/*
 *    ui
 *    ==
 */
/*
 *    prompt()
 */
char prompt(char *str)
{
      char cmd[81];

      fputs(str, stdout);
      fflush(stdout);

      /* get NULL terminated input */
      fgets(cmd, 81, stdin);

      return cmd[0];          /* return response letter */
}

/*
 *    more()
 */
int more(void)
{
      char cmd[81];

      fputs("- hit Enter to continue, e[x]it -", stdout);
      fflush(stdout);

      /* get NULL terminated input */
      fgets(cmd, 80, stdin);

      if (cmd[0] == 'x')
            return 1;   /* do NOT continue */
      else
            return 0;   /* continue */
}

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