3 * Copyright (C) 2005 Simone Piccardi
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 /****************************************************************
22 * Routine to write an exact number of bytes into a file
24 * Author: Simone Piccardi
27 ****************************************************************/
28 #include <unistd.h> /* unix standard library */
29 #include <errno.h> /* error definitions and routines */
30 #include <stdio.h> /* standard I/O library */
32 size_t full_fwrite(FILE *file, const void *buf, size_t count)
38 while (nleft > 0) { /* repeat until no left */
39 if ( (nwritten = fwrite(buf, 1, nleft, file)) < nleft) {
40 if (ferror(file)) { /* if error */
41 return(-1); /* return negative value as error */
44 nleft -= nwritten; /* set left to write */
45 buf +=nwritten; /* set pointer */