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1 /*	$OpenBSD: local.h,v 1.12 2005/10/10 17:37:44 espie Exp $	*/
2 
3 /*-
4  * Copyright (c) 1990, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Chris Torek.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 #include "wcio.h"
36 #include "fileext.h"
37 
38 #ifndef DEFFILEMODE
39 #define DEFFILEMODE  (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
40 #endif
41 
42 
43 /*
44  * Information local to this implementation of stdio,
45  * in particular, macros and private variables.
46  */
47 
48 int	__sflush(FILE *);
49 FILE	*__sfp(void);
50 int	__srefill(FILE *);
51 int	__sread(void *, char *, int);
52 int	__swrite(void *, const char *, int);
53 fpos_t	__sseek(void *, fpos_t, int);
54 int	__sclose(void *);
55 void	__sinit(void);
56 void	_cleanup(void);
57 void	__smakebuf(FILE *);
58 int	__swhatbuf(FILE *, size_t *, int *);
59 int	_fwalk(int (*)(FILE *));
60 int	__swsetup(FILE *);
61 int	__sflags(const char *, int *);
62 
63 extern void __atexit_register_cleanup(void (*)(void));
64 extern int __sdidinit;
65 
66 /*
67  * Return true if the given FILE cannot be written now.
68  */
69 #define	cantwrite(fp) \
70 	((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
71 	 __swsetup(fp))
72 
73 /*
74  * Test whether the given stdio file has an active ungetc buffer;
75  * release such a buffer, without restoring ordinary unread data.
76  */
77 #define	HASUB(fp) (_UB(fp)._base != NULL)
78 #define	FREEUB(fp) { \
79 	if (_UB(fp)._base != (fp)->_ubuf) \
80 		free(_UB(fp)._base); \
81 	_UB(fp)._base = NULL; \
82 }
83 
84 /*
85  * test for an fgetln() buffer.
86  */
87 #define	HASLB(fp) ((fp)->_lb._base != NULL)
88 #define	FREELB(fp) { \
89 	free((char *)(fp)->_lb._base); \
90 	(fp)->_lb._base = NULL; \
91 }
92