+++ /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 <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "local.h"
-
-static int
-lflush(fp)
- FILE *fp;
-{
-
- if ((fp->_flags & (__SLBF|__SWR)) == __SLBF|__SWR)
- return (__sflush(fp));
- return (0);
-}
-
-/*
- * Refill a stdio buffer.
- * Return EOF on eof or error, 0 otherwise.
- */
-int
-__srefill(fp)
- register FILE *fp;
-{
-
- /* make sure stdio is set up */
- if (!__sdidinit)
- __sinit();
-
- fp->_r = 0; /* largely a convenience for callers */
-
- /* SysV does not make this test; take it out for compatibility */
- if (fp->_flags & __SEOF)
- return (EOF);
-
- /* if not already reading, have to be reading and writing */
- if ((fp->_flags & __SRD) == 0) {
- if ((fp->_flags & __SRW) == 0) {
- errno = EBADF;
- return (EOF);
- }
- /* switch to reading */
- if (fp->_flags & __SWR) {
- if (__sflush(fp))
- return (EOF);
- fp->_flags &= ~__SWR;
- fp->_w = 0;
- fp->_lbfsize = 0;
- }
- fp->_flags |= __SRD;
- } else {
- /*
- * We were reading. If there is an ungetc buffer,
- * we must have been reading from that. Drop it,
- * restoring the previous buffer (if any). If there
- * is anything in that buffer, return.
- */
- if (HASUB(fp)) {
- FREEUB(fp);
- if ((fp->_r = fp->_ur) != 0) {
- fp->_p = fp->_up;
- return (0);
- }
- }
- }
-
- if (fp->_bf._base == NULL)
- __smakebuf(fp);
-
- /*
- * Before reading from a line buffered or unbuffered file,
- * flush all line buffered output files, per the ANSI C
- * standard.
- */
- if (fp->_flags & (__SLBF|__SNBF))
- (void) _fwalk(lflush);
- fp->_p = fp->_bf._base;
- fp->_r = (*fp->_read)(fp->_cookie, (char *)fp->_p, fp->_bf._size);
- fp->_flags &= ~__SMOD; /* buffer contents are again pristine */
- if (fp->_r <= 0) {
- if (fp->_r == 0)
- fp->_flags |= __SEOF;
- else {
- fp->_r = 0;
- fp->_flags |= __SERR;
- }
- return (EOF);
- }
- return (0);
-}
projects / apple / libc.git / blobdiff