local.h revision aa50585d961fb2b0f6943399d90ca0ec734946a3 
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/*
36 * Information local to this implementation of stdio,
37 * in particular, macros and private variables.
38 */
39
40#include <wchar.h>
41#include "wcio.h"
42#include "fileext.h"
43
44#if defined(__LP64__)
45/*
46 * Android <= KitKat had getc/putc macros in <stdio.h> that referred
47 * to __srget/__swbuf, so those symbols need to be public for LP32
48 * but can be hidden for LP64.
49 */
50__LIBC_HIDDEN__ int __srget(FILE*);
51__LIBC_HIDDEN__ int __swbuf(int, FILE*);
52
53/*
54 * The NDK apparently includes an android_support.a library that
55 * refers to __srefill in its copy of the vsnprintf implementation.
56 */
57__LIBC_HIDDEN__ int __srefill(FILE*);
58#else
59__LIBC_ABI_PUBLIC__ int __srget(FILE*);
60__LIBC_ABI_PUBLIC__ int __swbuf(int, FILE*);
61__LIBC_ABI_PUBLIC__ int __srefill(FILE*);
62#endif
63
64#pragma GCC visibility push(hidden)
65
66int	__sflush(FILE *);
67int	__sflush_locked(FILE *);
68FILE	*__sfp(void);
69int	__sread(void *, char *, int);
70int	__swrite(void *, const char *, int);
71fpos_t	__sseek(void *, fpos_t, int);
72int	__sclose(void *);
73void	__sinit(void);
74void	_cleanup(void);
75void	__smakebuf(FILE *);
76int	__swhatbuf(FILE *, size_t *, int *);
77int	_fwalk(int (*)(FILE *));
78int	__swsetup(FILE *);
79int	__sflags(const char *, int *);
80wint_t __fgetwc_unlock(FILE *);
81wint_t	__ungetwc(wint_t, FILE *);
82int	__vfprintf(FILE *, const char *, __va_list);
83int	__svfscanf(FILE * __restrict, const char * __restrict, __va_list);
84int	__vfwprintf(FILE * __restrict, const wchar_t * __restrict, __va_list);
85int	__vfwscanf(FILE * __restrict, const wchar_t * __restrict, __va_list);
86
87extern void __atexit_register_cleanup(void (*)(void));
88extern int __sdidinit;
89
90/*
91 * Return true if the given FILE cannot be written now.
92 */
93#define	cantwrite(fp) \
94	((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
95	 __swsetup(fp))
96
97/*
98 * Test whether the given stdio file has an active ungetc buffer;
99 * release such a buffer, without restoring ordinary unread data.
100 */
101#define	HASUB(fp) (_UB(fp)._base != NULL)
102#define	FREEUB(fp) { \
103	if (_UB(fp)._base != (fp)->_ubuf) \
104		free(_UB(fp)._base); \
105	_UB(fp)._base = NULL; \
106}
107
108/*
109 * test for an fgetln() buffer.
110 */
111#define	HASLB(fp) ((fp)->_lb._base != NULL)
112#define	FREELB(fp) { \
113	free((char *)(fp)->_lb._base); \
114	(fp)->_lb._base = NULL; \
115}
116
117#define FLOCKFILE(fp)   flockfile(fp)
118#define FUNLOCKFILE(fp) funlockfile(fp)
119
120#define FLOATING_POINT
121#define PRINTF_WIDE_CHAR
122#define SCANF_WIDE_CHAR
123#define NO_PRINTF_PERCENT_N
124
125/* OpenBSD exposes these in <stdio.h>, but we only want them exposed to the implementation. */
126int __srget(FILE*);
127int __swbuf(int, FILE*);
128#define __sfeof(p)     (((p)->_flags & __SEOF) != 0)
129#define __sferror(p)   (((p)->_flags & __SERR) != 0)
130#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
131#define __sfileno(p)   ((p)->_file)
132#define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
133static __inline int __sputc(int _c, FILE* _p) {
134  if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) {
135    return (*_p->_p++ = _c);
136  } else {
137    return (__swbuf(_c, _p));
138  }
139}
140
141/* OpenBSD declares these in fvwrite.h but we want to ensure they're hidden. */
142struct __suio;
143extern int __sfvwrite(FILE *, struct __suio *);
144wint_t __fputwc_unlock(wchar_t wc, FILE *fp);
145
146#pragma GCC visibility pop
147