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 __BEGIN_DECLS
45 
46 /*
47  * Android <= KitKat had getc/putc macros in <stdio.h> that referred
48  * to __srget/__swbuf, so those symbols need to be public for LP32
49  * but can be hidden for LP64.
50  */
51 __LIBC64_HIDDEN__ int __srget(FILE*);
52 __LIBC64_HIDDEN__ int __swbuf(int, FILE*);
53 __LIBC64_HIDDEN__ int __srefill(FILE*);
54 
55 /* This was referenced by the apportable middleware for LP32. */
56 __LIBC64_HIDDEN__ int __swsetup(FILE*);
57 
58 /* These were referenced by a couple of different pieces of middleware and the Crystax NDK. */
59 __LIBC64_HIDDEN__ extern int __sdidinit;
60 __LIBC64_HIDDEN__ int __sflags(const char*, int*);
61 __LIBC64_HIDDEN__ FILE* __sfp(void);
62 __LIBC64_HIDDEN__ void __sinit(void);
63 __LIBC64_HIDDEN__ void __smakebuf(FILE*);
64 
65 /* These are referenced by the Greed for Glory franchise. */
66 __LIBC64_HIDDEN__ int __sflush(FILE *);
67 __LIBC64_HIDDEN__ int __sread(void *, char *, int);
68 __LIBC64_HIDDEN__ int __swrite(void *, const char *, int);
69 __LIBC64_HIDDEN__ fpos_t __sseek(void *, fpos_t, int);
70 __LIBC64_HIDDEN__ int __sclose(void *);
71 __LIBC64_HIDDEN__ int _fwalk(int (*)(FILE *));
72 
73 #pragma GCC visibility push(hidden)
74 
75 int	__sflush_locked(FILE *);
76 void	_cleanup(void);
77 int	__swhatbuf(FILE *, size_t *, int *);
78 wint_t __fgetwc_unlock(FILE *);
79 wint_t	__ungetwc(wint_t, FILE *);
80 int	__vfprintf(FILE *, const char *, __va_list);
81 int	__svfscanf(FILE * __restrict, const char * __restrict, __va_list);
82 int	__vfwprintf(FILE * __restrict, const wchar_t * __restrict, __va_list);
83 int	__vfwscanf(FILE * __restrict, const wchar_t * __restrict, __va_list);
84 
85 extern void __atexit_register_cleanup(void (*)(void));
86 
87 /*
88  * Return true if the given FILE cannot be written now.
89  */
90 #define	cantwrite(fp) \
91 	((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
92 	 __swsetup(fp))
93 
94 /*
95  * Test whether the given stdio file has an active ungetc buffer;
96  * release such a buffer, without restoring ordinary unread data.
97  */
98 #define	HASUB(fp) (_UB(fp)._base != NULL)
99 #define	FREEUB(fp) { \
100 	if (_UB(fp)._base != (fp)->_ubuf) \
101 		free(_UB(fp)._base); \
102 	_UB(fp)._base = NULL; \
103 }
104 
105 /*
106  * test for an fgetln() buffer.
107  */
108 #define	HASLB(fp) ((fp)->_lb._base != NULL)
109 #define	FREELB(fp) { \
110 	free((char *)(fp)->_lb._base); \
111 	(fp)->_lb._base = NULL; \
112 }
113 
114 #define FLOCKFILE(fp)   if (_EXT(fp)->_stdio_handles_locking) flockfile(fp)
115 #define FUNLOCKFILE(fp) if (_EXT(fp)->_stdio_handles_locking) funlockfile(fp)
116 
117 #define FLOATING_POINT
118 #define PRINTF_WIDE_CHAR
119 #define SCANF_WIDE_CHAR
120 #define NO_PRINTF_PERCENT_N
121 
122 /* OpenBSD exposes these in <stdio.h>, but we only want them exposed to the implementation. */
123 #define __sfeof(p)     (((p)->_flags & __SEOF) != 0)
124 #define __sferror(p)   (((p)->_flags & __SERR) != 0)
125 #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
126 #define __sfileno(p)   ((p)->_file)
127 #if !defined(__cplusplus)
128 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
__sputc(int _c,FILE * _p)129 static __inline int __sputc(int _c, FILE* _p) {
130   if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) {
131     return (*_p->_p++ = _c);
132   } else {
133     return (__swbuf(_c, _p));
134   }
135 }
136 #endif
137 
138 /* OpenBSD declares these in fvwrite.h but we want to ensure they're hidden. */
139 struct __suio;
140 extern int __sfvwrite(FILE *, struct __suio *);
141 wint_t __fputwc_unlock(wchar_t wc, FILE *fp);
142 
143 #pragma GCC visibility pop
144 
145 __END_DECLS
146