/*

Copyright (C) 2007, 2008, 2009 David Bateman

This file is part of Octave.

Octave 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 3 of the License, or (at your
option) any later version.

Octave 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 Octave; see the file COPYING.  If not, see
<http://www.gnu.org/licenses/>.

*/

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

#include <cstdio>

#include <string>
#include <vector>

#include "lo-error.h"
#include "oct-md5.h"
#include "md5.h"

static std::string
oct_md5_result_to_str (const unsigned char *buf)
{
  char tmp [32];

  for (octave_idx_type i = 0; i < 16; i++)
    sprintf (&tmp[2*i], "%02x", buf[i]);

  return std::string (tmp, 32);
}
 
std::string
oct_md5 (const std::string str)
{
  unsigned char buf[16];

  md5_buffer (str.data (), str.length (), buf);

  return oct_md5_result_to_str (buf);
}
          
std::string
oct_md5_file (const std::string file)
{
  std::string retval;

  FILE *ifile = fopen (file.c_str (), "rb");

  if (ifile)
    {
      unsigned char buf[16];

      if (! md5_stream (ifile, buf))
        retval = oct_md5_result_to_str (buf);
      else
        (*current_liboctave_error_handler) ("internal error in md5_stream");
    }
  else
    (*current_liboctave_error_handler) ("unable to open file `%s' for reading",
                                        file.c_str());

  return retval;
}