diff options
Diffstat (limited to 'mit-pthreads/stdio/setvbuf.c')
| -rw-r--r-- | mit-pthreads/stdio/setvbuf.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/mit-pthreads/stdio/setvbuf.c b/mit-pthreads/stdio/setvbuf.c deleted file mode 100644 index 288d8c32db0..00000000000 --- a/mit-pthreads/stdio/setvbuf.c +++ /dev/null @@ -1,154 +0,0 @@ -/*- - * Copyright (c) 1990 The Regents of the University of California. - * Copyright (c) 1993, 1994 Chris Provenzano. - * 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. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -/*static char *sccsid = "from: @(#)setvbuf.c 5.5 (Berkeley) 5/6/93";*/ -static char *rcsid = "$Id$"; -#endif /* LIBC_SCCS and not lint */ - -#include <pthread.h> -#include <stdio.h> -#include <stdlib.h> -#include "local.h" - -/* - * Set one of the three kinds of buffering, optionally including - * a buffer. - */ -setvbuf(fp, buf, mode, size) - register FILE *fp; - char *buf; - register int mode; - register size_t size; -{ - register int ret, flags; - size_t iosize; - int ttyflag; - - /* - * Verify arguments. The `int' limit on `size' is due to this - * particular implementation. Note, buf and size are ignored - * when setting _IONBF. - */ - if (mode != _IONBF) - if ((mode != _IOFBF && mode != _IOLBF) || (int)size < 0) - return (EOF); - - flockfile(fp); - /* - * Write current buffer, if any. Discard unread input, cancel - * line buffering, and free old buffer if malloc()ed. - */ - ret = 0; - (void)__sflush(fp); - fp->_r = fp->_lbfsize = 0; - flags = fp->_flags; - if (flags & __SMBF) - free((void *)fp->_bf._base); - flags &= ~(__SLBF | __SNBF | __SMBF | __SOPT | __SNPT); - - /* If setting unbuffered mode, skip all the hard work. */ - if (mode == _IONBF) - goto nbf; - - /* - * Find optimal I/O size for seek optimization. This also returns - * a `tty flag' to suggest that we check isatty(fd), but we do not - * care since our caller told us how to buffer. - */ - flags |= __swhatbuf(fp, &iosize, &ttyflag); - if (size == 0) { - buf = NULL; /* force local allocation */ - size = iosize; - } - - /* Allocate buffer if needed. */ - if (buf == NULL) { - if ((buf = malloc(size)) == NULL) { - /* - * Unable to honor user's request. We will return - * failure, but try again with file system size. - */ - ret = EOF; - if (size != iosize) { - size = iosize; - buf = malloc(size); - } - } - if (buf == NULL) { - /* No luck; switch to unbuffered I/O. */ -nbf: - fp->_flags = flags | __SNBF; - fp->_w = 0; - fp->_bf._base = fp->_p = fp->_nbuf; - fp->_bf._size = 1; - funlockfile(fp); - return (ret); - } - flags |= __SMBF; - } - - /* - * Kill any seek optimization if the buffer is not the - * right size. - * - * SHOULD WE ALLOW MULTIPLES HERE (i.e., ok iff (size % iosize) == 0)? - */ - if (size != iosize) - flags |= __SNPT; - - /* - * Fix up the FILE fields, and set __cleanup for output flush on - * exit (since we are buffered in some way). If in r/w mode, go - * to the intermediate state, so that everyone has to call - * __srefill or __swsetup on the first operation -- it is more - * trouble than it is worth to set things up correctly here. - */ - if (mode == _IOLBF) - flags |= __SLBF; - if (flags & __SRW) - flags &= ~(__SRD | __SWR); - fp->_w = size; /* Was 0 (mevans) */ - fp->_flags = flags; - fp->_bf._base = fp->_p = (unsigned char *)buf; - fp->_bf._size = size; - fp->_lbfsize = 0; - __cleanup = _cleanup; - - funlockfile(fp); - return (ret); -} |