1*46089Sbostic /*- 2*46089Sbostic * Copyright (c) 1990 The Regents of the University of California. 3*46089Sbostic * All rights reserved. 4*46089Sbostic * 5*46089Sbostic * This code is derived from software contributed to Berkeley by 6*46089Sbostic * Chris Torek. 7*46089Sbostic * 8*46089Sbostic * %sccs.include.redist.c% 921408Sdist */ 1021408Sdist 1126655Sdonn #if defined(LIBC_SCCS) && !defined(lint) 12*46089Sbostic static char sccsid[] = "@(#)fwrite.c 5.3 (Berkeley) 01/20/91"; 13*46089Sbostic #endif /* LIBC_SCCS and not lint */ 1421408Sdist 15*46089Sbostic #include <stdio.h> 16*46089Sbostic #include <string.h> 17*46089Sbostic #include "local.h" 18*46089Sbostic #include "fvwrite.h" 1916550Skarels 20*46089Sbostic /* 21*46089Sbostic * Write `count' objects (each size `size') from memory to the given file. 22*46089Sbostic * Return the number of whole objects written. 23*46089Sbostic */ 24*46089Sbostic fwrite(buf, size, count, fp) 25*46089Sbostic void *buf; 26*46089Sbostic size_t size, count; 27*46089Sbostic FILE *fp; 2816550Skarels { 29*46089Sbostic size_t n; 30*46089Sbostic struct __suio uio; 31*46089Sbostic struct __siov iov; 3216550Skarels 33*46089Sbostic iov.iov_base = buf; 34*46089Sbostic uio.uio_resid = iov.iov_len = n = count * size; 35*46089Sbostic uio.uio_iov = &iov; 36*46089Sbostic uio.uio_iovcnt = 1; 37*46089Sbostic 38*46089Sbostic /* 39*46089Sbostic * The usual case is success (__sfvwrite returns 0); 40*46089Sbostic * skip the divide if this happens, since divides are 41*46089Sbostic * generally slow and since this occurs whenever size==0. 42*46089Sbostic */ 43*46089Sbostic if (__sfvwrite(fp, &uio) == 0) 44*46089Sbostic return (count); 45*46089Sbostic return ((n - uio.uio_resid) / size); 4616550Skarels } 47