diff options
Diffstat (limited to 'lib/libc/stdio/refill.c')
| -rw-r--r-- | lib/libc/stdio/refill.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/lib/libc/stdio/refill.c b/lib/libc/stdio/refill.c deleted file mode 100644 index f2a1f16..0000000 --- a/lib/libc/stdio/refill.c +++ /dev/null @@ -1,146 +0,0 @@ -/*- - * 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. - * 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. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)refill.c 8.1 (Berkeley) 6/4/93"; -#endif /* LIBC_SCCS and not lint */ -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include "namespace.h" -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include "un-namespace.h" - -#include "libc_private.h" -#include "local.h" - -static int lflush(FILE *); - -static int -lflush(FILE *fp) -{ - int ret = 0; - - if ((fp->_flags & (__SLBF|__SWR)) == (__SLBF|__SWR)) { - FLOCKFILE(fp); - ret = __sflush(fp); - FUNLOCKFILE(fp); - } - return (ret); -} - -/* - * Refill a stdio buffer. - * Return EOF on eof or error, 0 otherwise. - */ -int -__srefill(FILE *fp) -{ - - /* make sure stdio is set up */ - if (!__sdidinit) - __sinit(); - - ORIENT(fp, -1); - - 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; - fp->_flags |= __SERR; - 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)) { - /* Ignore this file in _fwalk to avoid potential deadlock. */ - fp->_flags |= __SIGN; - (void) _fwalk(lflush); - fp->_flags &= ~__SIGN; - - /* Now flush this file without locking it. */ - if ((fp->_flags & (__SLBF|__SWR)) == (__SLBF|__SWR)) - __sflush(fp); - } - fp->_p = fp->_bf._base; - fp->_r = _sread(fp, (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); -} |
