/*
  This file is part of ethash.

  ethash 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.

  ethash 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 ethash.  If not, see <http://www.gnu.org/licenses/>.
*/
/** @file io_win32.c
 * @author Lefteris Karapetsas <lefteris@ethdev.com>
 * @date 2015
 */

#include "io.h"
#include <direct.h>
#include <errno.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>

FILE *ethash_fopen(const char *file_name, const char *mode)
{
	FILE *f;
	return fopen_s(&f, file_name, mode) == 0 ? f : NULL;
}

char *ethash_strncat(char *dest, size_t dest_size, const char *src, size_t count)
{
	return strncat_s(dest, dest_size, src, count) == 0 ? dest : NULL;
}

bool ethash_mkdir(char const *dirname)
{
	int rc = _mkdir(dirname);
	return rc != -1 || errno == EEXIST;
}

int ethash_fileno(FILE *f)
{
	return _fileno(f);
}

bool ethash_file_size(FILE *f, size_t *ret_size)
{
	struct _stat st;
	int fd;
	if ((fd = _fileno(f)) == -1 || _fstat(fd, &st) != 0) {
		return false;
	}
	*ret_size = st.st_size;
	return true;
}