local.h revision 71579 
1/*-
2 * Copyright (c) 1990, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	@(#)local.h	8.3 (Berkeley) 7/3/94
37 *
38 * $FreeBSD: head/lib/libc/stdio/local.h 71579 2001-01-24 13:01:12Z deischen $
39 */
40
41#include <sys/types.h>	/* for off_t */
42
43/*
44 * Information local to this implementation of stdio,
45 * in particular, macros and private variables.
46 */
47
48extern int	_fseeko __P((FILE *, off_t, int));
49extern int	__fflush __P((FILE *fp));
50extern int	__sflush __P((FILE *));
51extern FILE	*__sfp __P((void));
52extern int	__srefill __P((FILE *));
53extern int	__sread __P((void *, char *, int));
54extern int	__swrite __P((void *, char const *, int));
55extern fpos_t	__sseek __P((void *, fpos_t, int));
56extern int	__sclose __P((void *));
57extern void	__sinit __P((void));
58extern void	_cleanup __P((void));
59extern void	(*__cleanup) __P((void));
60extern void	__smakebuf __P((FILE *));
61extern int	__swhatbuf __P((FILE *, size_t *, int *));
62extern int	_fwalk __P((int (*)(FILE *)));
63extern int	__swsetup __P((FILE *));
64extern int	__sflags __P((const char *, int *));
65extern int	__ungetc __P((int, FILE *));
66extern int	__vfprintf __P((FILE *, const char *, _BSD_VA_LIST_));
67
68extern int	__sdidinit;
69
70/*
71 * Return true iff the given FILE cannot be written now.
72 */
73#define	cantwrite(fp) \
74	((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
75	 __swsetup(fp))
76
77/*
78 * Test whether the given stdio file has an active ungetc buffer;
79 * release such a buffer, without restoring ordinary unread data.
80 */
81#define	HASUB(fp) ((fp)->_ub._base != NULL)
82#define	FREEUB(fp) { \
83	if ((fp)->_ub._base != (fp)->_ubuf) \
84		free((char *)(fp)->_ub._base); \
85	(fp)->_ub._base = NULL; \
86}
87
88/*
89 * test for an fgetln() buffer.
90 */
91#define	HASLB(fp) ((fp)->_lb._base != NULL)
92#define	FREELB(fp) { \
93	free((char *)(fp)->_lb._base); \
94	(fp)->_lb._base = NULL; \
95}
96