local.h revision f6d2ca269603c16a3b3bd4a2306fb961a79ba92f 
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/* TODO(LP64): __LIBC_HIDDEN__ int __srefill(FILE*);*/
58/* http://b/15291317: the LP64 NDK needs to be fixed to remove that cruft. */
59__LIBC_ABI_PUBLIC__ int __srefill(FILE*);
60#else
61__LIBC_ABI_PUBLIC__ int __srget(FILE*);
62__LIBC_ABI_PUBLIC__ int __swbuf(int, FILE*);
63__LIBC_ABI_PUBLIC__ int __srefill(FILE*);
64#endif
65
66#pragma GCC visibility push(hidden)
67
68int	__sflush(FILE *);
69int	__sflush_locked(FILE *);
70FILE	*__sfp(void);
71int	__sread(void *, char *, int);
72int	__swrite(void *, const char *, int);
73fpos_t	__sseek(void *, fpos_t, int);
74int	__sclose(void *);
75void	__sinit(void);
76void	_cleanup(void);
77void	__smakebuf(FILE *);
78int	__swhatbuf(FILE *, size_t *, int *);
79int	_fwalk(int (*)(FILE *));
80int	__swsetup(FILE *);
81int	__sflags(const char *, int *);
82wint_t __fgetwc_unlock(FILE *);
83wint_t	__ungetwc(wint_t, FILE *);
84int	__vfprintf(FILE *, const char *, __va_list);
85int	__svfscanf(FILE * __restrict, const char * __restrict, __va_list);
86int	__vfwprintf(FILE * __restrict, const wchar_t * __restrict, __va_list);
87int	__vfwscanf(FILE * __restrict, const wchar_t * __restrict, __va_list);
88
89extern void __atexit_register_cleanup(void (*)(void));
90extern int __sdidinit;
91
92/*
93 * Return true if the given FILE cannot be written now.
94 */
95#define	cantwrite(fp) \
96	((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
97	 __swsetup(fp))
98
99/*
100 * Test whether the given stdio file has an active ungetc buffer;
101 * release such a buffer, without restoring ordinary unread data.
102 */
103#define	HASUB(fp) (_UB(fp)._base != NULL)
104#define	FREEUB(fp) { \
105	if (_UB(fp)._base != (fp)->_ubuf) \
106		free(_UB(fp)._base); \
107	_UB(fp)._base = NULL; \
108}
109
110/*
111 * test for an fgetln() buffer.
112 */
113#define	HASLB(fp) ((fp)->_lb._base != NULL)
114#define	FREELB(fp) { \
115	free((char *)(fp)->_lb._base); \
116	(fp)->_lb._base = NULL; \
117}
118
119#define FLOCKFILE(fp)   flockfile(fp)
120#define FUNLOCKFILE(fp) funlockfile(fp)
121
122#define FLOATING_POINT
123#define PRINTF_WIDE_CHAR
124#define SCANF_WIDE_CHAR
125#define NO_PRINTF_PERCENT_N
126
127/* OpenBSD exposes these in <stdio.h>, but we only want them exposed to the implementation. */
128int __srget(FILE*);
129int __swbuf(int, FILE*);
130#define __sfeof(p)     (((p)->_flags & __SEOF) != 0)
131#define __sferror(p)   (((p)->_flags & __SERR) != 0)
132#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
133#define __sfileno(p)   ((p)->_file)
134#define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
135static __inline int __sputc(int _c, FILE* _p) {
136  if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) {
137    return (*_p->_p++ = _c);
138  } else {
139    return (__swbuf(_c, _p));
140  }
141}
142
143/* OpenBSD declares these in fvwrite.h but we want to ensure they're hidden. */
144struct __suio;
145extern int __sfvwrite(FILE *, struct __suio *);
146wint_t __fputwc_unlock(wchar_t wc, FILE *fp);
147
148#pragma GCC visibility pop
149