fwrite.c - vx32 - Local 9vx git repository for patches.
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       ---
       fwrite.c (2794B)
       ---
            1 /*-
            2  * Copyright (c) 1990, 1993
            3  *        The Regents of the University of California.  All rights reserved.
            4  *
            5  * This code is derived from software contributed to Berkeley by
            6  * Chris Torek.
            7  *
            8  * Redistribution and use in source and binary forms, with or without
            9  * modification, are permitted provided that the following conditions
           10  * are met:
           11  * 1. Redistributions of source code must retain the above copyright
           12  *    notice, this list of conditions and the following disclaimer.
           13  * 2. Redistributions in binary form must reproduce the above copyright
           14  *    notice, this list of conditions and the following disclaimer in the
           15  *    documentation and/or other materials provided with the distribution.
           16  * 3. All advertising materials mentioning features or use of this software
           17  *    must display the following acknowledgement:
           18  *        This product includes software developed by the University of
           19  *        California, Berkeley and its contributors.
           20  * 4. Neither the name of the University nor the names of its contributors
           21  *    may be used to endorse or promote products derived from this software
           22  *    without specific prior written permission.
           23  *
           24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
           25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
           26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
           27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
           28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
           29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
           30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
           31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
           32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
           33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
           34  * SUCH DAMAGE.
           35  */
           36 
           37 #if defined(LIBC_SCCS) && !defined(lint)
           38 static char rcsid[] = "$OpenBSD: fwrite.c,v 1.2 1996/08/19 08:32:50 tholo Exp $";
           39 #endif /* LIBC_SCCS and not lint */
           40 
           41 #include <stdio.h>
           42 #include "local.h"
           43 #include "fvwrite.h"
           44 
           45 /*
           46  * Write `count' objects (each size `size') from memory to the given file.
           47  * Return the number of whole objects written.
           48  */
           49 size_t
           50 fwrite(buf, size, count, fp)
           51         const void *buf;
           52         size_t size, count;
           53         FILE *fp;
           54 {
           55         size_t n;
           56         struct __suio uio;
           57         struct __siov iov;
           58 
           59         iov.iov_base = (void *)buf;
           60         uio.uio_resid = iov.iov_len = n = count * size;
           61         uio.uio_iov = &iov;
           62         uio.uio_iovcnt = 1;
           63 
           64         /*
           65          * The usual case is success (__sfvwrite returns 0);
           66          * skip the divide if this happens, since divides are
           67          * generally slow and since this occurs whenever size==0.
           68          */
           69         if (__sfvwrite(fp, &uio) == 0)
           70                 return (count);
           71         return ((n - uio.uio_resid) / size);
           72 }