io.c

/* io.c
 *
 * Miscellaneous functions used by the example programs.
 */

/* nettle, low-level cryptographics library
 *
 * Copyright (C) 2002 Niels Mller
 *  
 * The nettle 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 2.1 of the License, or (at your
 * option) any later version.
 * 
 * The nettle 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 nettle library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA 02111-1307, USA.
 */

#if HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdarg.h>
#include <stdlib.h>

/* For errno and strerror */
#include <errno.h>
#include <string.h>

#include "io.h"

#define RANDOM_DEVICE "/dev/urandom"
#define BUFSIZE 1000

int quiet_flag = 0;

void *
xalloc(size_t size)
{
  void *p = malloc(size);
  if (!p)
    {
      fprintf(stderr, "Virtual memory exhausted.\n");
      abort();
    }

  return p;
}

void
werror(const char *format, ...)
{
  if (!quiet_flag)
    {
      va_list args;
      va_start(args, format);
      vfprintf(stderr, format, args);
      va_end(args);
    }
}

#define MIN(a,b) (((a) < (b)) ? (a) : (b))