+++ /dev/null
-/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * Copyright (c) 1990, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Chris Torek.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-
-#include <stdio.h>
-#include <string.h>
-#include "local.h"
-#include "fvwrite.h"
-
-/*
- * Write some memory regions. Return zero on success, EOF on error.
- *
- * This routine is large and unsightly, but most of the ugliness due
- * to the three different kinds of output buffering is handled here.
- */
-int
-__sfvwrite(fp, uio)
- register FILE *fp;
- register struct __suio *uio;
-{
- register size_t len;
- register char *p;
- register struct __siov *iov;
- register int w, s;
- char *nl;
- int nlknown, nldist;
-
- if ((len = uio->uio_resid) == 0)
- return (0);
- /* make sure we can write */
- if (cantwrite(fp))
- return (EOF);
-
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-#define COPY(n) (void)memcpy((void *)fp->_p, (void *)p, (size_t)(n))
-
- iov = uio->uio_iov;
- p = iov->iov_base;
- len = iov->iov_len;
- iov++;
-#define GETIOV(extra_work) \
- while (len == 0) { \
- extra_work; \
- p = iov->iov_base; \
- len = iov->iov_len; \
- iov++; \
- }
- if (fp->_flags & __SNBF) {
- /*
- * Unbuffered: write up to BUFSIZ bytes at a time.
- */
- do {
- GETIOV(;);
- w = (*fp->_write)(fp->_cookie, p, MIN(len, BUFSIZ));
- if (w <= 0)
- goto err;
- p += w;
- len -= w;
- } while ((uio->uio_resid -= w) != 0);
- } else if ((fp->_flags & __SLBF) == 0) {
- /*
- * Fully buffered: fill partially full buffer, if any,
- * and then flush. If there is no partial buffer, write
- * one _bf._size byte chunk directly (without copying).
- *
- * String output is a special case: write as many bytes
- * as fit, but pretend we wrote everything. This makes
- * snprintf() return the number of bytes needed, rather
- * than the number used, and avoids its write function
- * (so that the write function can be invalid).
- */
- do {
- GETIOV(;);
- w = fp->_w;
- if (fp->_flags & __SSTR) {
- if (len < w)
- w = len;
- COPY(w); /* copy MIN(fp->_w,len), */
- fp->_w -= w;
- fp->_p += w;
- w = len; /* but pretend copied all */
- } else if (fp->_p > fp->_bf._base && len > w) {
- /* fill and flush */
- COPY(w);
- /* fp->_w -= w; */ /* unneeded */
- fp->_p += w;
- if (fflush(fp))
- goto err;
- } else if (len >= (w = fp->_bf._size)) {
- /* write directly */
- w = (*fp->_write)(fp->_cookie, p, w);
- if (w <= 0)
- goto err;
- } else {
- /* fill and done */
- w = len;
- COPY(w);
- fp->_w -= w;
- fp->_p += w;
- }
- p += w;
- len -= w;
- } while ((uio->uio_resid -= w) != 0);
- } else {
- /*
- * Line buffered: like fully buffered, but we
- * must check for newlines. Compute the distance
- * to the first newline (including the newline),
- * or `infinity' if there is none, then pretend
- * that the amount to write is MIN(len,nldist).
- */
- nlknown = 0;
- nldist = 0; /* XXX just to keep gcc happy */
- do {
- GETIOV(nlknown = 0);
- if (!nlknown) {
- nl = memchr((void *)p, '\n', len);
- nldist = nl ? nl + 1 - p : len + 1;
- nlknown = 1;
- }
- s = MIN(len, nldist);
- w = fp->_w + fp->_bf._size;
- if (fp->_p > fp->_bf._base && s > w) {
- COPY(w);
- /* fp->_w -= w; */
- fp->_p += w;
- if (fflush(fp))
- goto err;
- } else if (s >= (w = fp->_bf._size)) {
- w = (*fp->_write)(fp->_cookie, p, w);
- if (w <= 0)
- goto err;
- } else {
- w = s;
- COPY(w);
- fp->_w -= w;
- fp->_p += w;
- }
- if ((nldist -= w) == 0) {
- /* copied the newline: flush and forget */
- if (fflush(fp))
- goto err;
- nlknown = 0;
- }
- p += w;
- len -= w;
- } while ((uio->uio_resid -= w) != 0);
- }
- return (0);
-
-err:
- fp->_flags |= __SERR;
- return (EOF);
-}
projects / apple / libc.git / blobdiff