146089Sbostic /*-
2*61180Sbostic * Copyright (c) 1990, 1993
3*61180Sbostic * The Regents of the University of California. All rights reserved.
446089Sbostic *
546089Sbostic * This code is derived from software contributed to Berkeley by
646089Sbostic * Chris Torek.
746089Sbostic *
846089Sbostic * %sccs.include.redist.c%
921408Sdist */
1021408Sdist
1126655Sdonn #if defined(LIBC_SCCS) && !defined(lint)
12*61180Sbostic static char sccsid[] = "@(#)fwrite.c 8.1 (Berkeley) 06/04/93";
1346089Sbostic #endif /* LIBC_SCCS and not lint */
1421408Sdist
1546089Sbostic #include <stdio.h>
1646089Sbostic #include "local.h"
1746089Sbostic #include "fvwrite.h"
1816550Skarels
1946089Sbostic /*
2046089Sbostic * Write `count' objects (each size `size') from memory to the given file.
2146089Sbostic * Return the number of whole objects written.
2246089Sbostic */
2350964Sbostic size_t
fwrite(buf,size,count,fp)2446089Sbostic fwrite(buf, size, count, fp)
2546271Storek const void *buf;
2646089Sbostic size_t size, count;
2746089Sbostic FILE *fp;
2816550Skarels {
2946089Sbostic size_t n;
3046089Sbostic struct __suio uio;
3146089Sbostic struct __siov iov;
3216550Skarels
3346271Storek iov.iov_base = (void *)buf;
3446089Sbostic uio.uio_resid = iov.iov_len = n = count * size;
3546089Sbostic uio.uio_iov = &iov;
3646089Sbostic uio.uio_iovcnt = 1;
3746089Sbostic
3846089Sbostic /*
3946089Sbostic * The usual case is success (__sfvwrite returns 0);
4046089Sbostic * skip the divide if this happens, since divides are
4146089Sbostic * generally slow and since this occurs whenever size==0.
4246089Sbostic */
4346089Sbostic if (__sfvwrite(fp, &uio) == 0)
4446089Sbostic return (count);
4546089Sbostic return ((n - uio.uio_resid) / size);
4616550Skarels }
47