write_bytes_to_stream.c

/*
 * Copyright (c) 2015 Ryan McCullagh <me@ryanmccullagh.com>
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
 
 #include "io.h"
 
int write_bytes_to_stream(FILE* fp, const void* data, size_t size)
{
        const unsigned char* bytes;
        size_t nwritten;
        int retval;

        bytes = (const unsigned char*)data;

        nwritten = fwrite(bytes, size, 1, fp);

        if(nwritten != 1) {
                retval = -1;
        } else {
                retval = 0;
        }

        return retval;
}