/*

 * Copyright (C) 2010 Frank Morgner

 *

 * This file is part of OpenSC.

 *

 * This 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.

 *

 * This 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 this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

int fread_to_eof(const char *file, unsigned char **buf, size_t *buflen)

{

  FILE *input = NULL;

  int r = 0;

  unsigned char *p;

  if (!buflen || !buf || !file)

    goto err;

#define MAX_READ_LEN 0xfff

  p = realloc(*buf, MAX_READ_LEN);

  if (!p)

    goto err;

  *buf = p;

  input = fopen(file, "rb");

  if (!input) {

    goto err;

  }

  *buflen = 0;

  while (feof(input) == 0 && *buflen < MAX_READ_LEN) {

    *buflen += fread(*buf+*buflen, 1, MAX_READ_LEN-*buflen, input);

    if (ferror(input)) {

      goto err;

    }

  }

  r = 1;

err:

  if (input)

    fclose(input);

  return r;

}