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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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)local.h 8.3 (Berkeley) 7/3/94
33 * $FreeBSD: src/lib/libc/stdio/local.h,v 1.33 2008/05/05 16:03:52 jhb Exp $
34 */
35
36 #include <sys/cdefs.h>
37 #include "xlocale_private.h"
38 #include "xprintf_private.h"
39 #include <sys/types.h> /* for off_t */
40 #include <pthread.h>
41 #include <limits.h>
42 #include <string.h>
43 #include <wchar.h>
44
45 /*
46 * Information local to this implementation of stdio,
47 * in particular, macros and private variables.
48 */
49
50 extern int _sread(FILE *, char *, int);
51 extern int _swrite(FILE *, char const *, int);
52 extern fpos_t _sseek(FILE *, fpos_t, int);
53 extern int _ftello(FILE *, fpos_t *);
54 extern int _fseeko(FILE *, off_t, int, int);
55 extern int _vasprintf(printf_comp_t __restrict, printf_domain_t __restrict,
56 char ** __restrict, locale_t __restrict,
57 const char * __restrict, __va_list);
58 extern int _vdprintf(printf_comp_t __restrict, printf_domain_t __restrict,
59 int, locale_t __restrict, const char * __restrict, va_list);
60 extern int _vsnprintf(printf_comp_t __restrict, printf_domain_t __restrict,
61 char * __restrict, size_t n, locale_t __restrict,
62 const char * __restrict, __va_list);
63
64 extern int __fflush(FILE *fp);
65 extern void __fcloseall(void);
66 extern wint_t __fgetwc(FILE *, locale_t);
67 extern wint_t __fputwc(wchar_t, FILE *, locale_t);
68 extern int __sflush(FILE *);
69 extern FILE *__sfp(int);
70 extern void __sfprelease(FILE *); /* mark free and update count as needed */
71 extern int __slbexpand(FILE *, size_t);
72 extern int __srefill(FILE *);
73 extern int __srefill0(FILE *);
74 extern int __srefill1(FILE *);
75 extern int __sread(void *, char *, int);
76 extern int __swrite(void *, char const *, int);
77 extern fpos_t __sseek(void *, fpos_t, int);
78 extern int __sclose(void *);
79 extern void __sinit(void);
80 extern void _cleanup(void);
81 extern void (*__cleanup)(void);
82 extern void __smakebuf(FILE *);
83 extern int __swhatbuf(FILE *, size_t *, int *);
84 extern int _fwalk(int (*)(FILE *));
85 extern int __svfscanf_l(FILE *, locale_t, const char *, __va_list);
86 extern int __swsetup(FILE *);
87 extern int __sflags(const char *, int *);
88 extern int __ungetc(int, FILE *);
89 extern wint_t __ungetwc(wint_t, FILE *, locale_t);
90 extern int __vfprintf(FILE *, locale_t, const char *, __va_list);
91 extern int __vfscanf(FILE *, const char *, __va_list);
92 extern int __vfwprintf(FILE *, locale_t, const wchar_t *, __va_list);
93 extern int __vfwscanf(FILE * __restrict, locale_t, const wchar_t * __restrict,
94 __va_list);
95 extern size_t __fread(void * __restrict buf, size_t size, size_t count,
96 FILE * __restrict fp);
97 extern pthread_once_t __sdidinit;
98
99
100 /* hold a buncha junk that would grow the ABI */
101 struct __sFILEX {
102 unsigned char *up; /* saved _p when _p is doing ungetc data */
103 pthread_mutex_t fl_mutex; /* used for MT-safety */
104 int orientation:2; /* orientation for fwide() */
105 int counted:1; /* stream counted against STREAM_MAX */
106 mbstate_t mbstate; /* multibyte conversion state */
107 };
108
109 #define _up _extra->up
110 #define _fl_mutex _extra->fl_mutex
111 #define _orientation _extra->orientation
112 #define _mbstate _extra->mbstate
113 #define _counted _extra->counted
114
115
116
117 #define INITEXTRA(fp) do { \
118 (fp)->_extra->up = NULL; \
119 (fp)->_extra->fl_mutex = (pthread_mutex_t)PTHREAD_RECURSIVE_MUTEX_INITIALIZER; \
120 (fp)->_extra->orientation = 0; \
121 memset(&(fp)->_extra->mbstate, 0, sizeof(mbstate_t)); \
122 (fp)->_extra->counted = 0; \
123 } while(0);
124
125 /*
126 * Prepare the given FILE for writing, and return 0 iff it
127 * can be written now. Otherwise, return EOF and set errno.
128 */
129 #define prepwrite(fp) \
130 ((((fp)->_flags & __SWR) == 0 || \
131 ((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \
132 __swsetup(fp))
133
134 /*
135 * Test whether the given stdio file has an active ungetc buffer;
136 * release such a buffer, without restoring ordinary unread data.
137 */
138 #define HASUB(fp) ((fp)->_ub._base != NULL)
139 #define FREEUB(fp) { \
140 if ((fp)->_ub._base != (fp)->_ubuf) \
141 free((char *)(fp)->_ub._base); \
142 (fp)->_ub._base = NULL; \
143 }
144
145 /*
146 * test for an fgetln() buffer.
147 */
148 #define HASLB(fp) ((fp)->_lb._base != NULL)
149 #define FREELB(fp) { \
150 free((char *)(fp)->_lb._base); \
151 (fp)->_lb._base = NULL; \
152 }
153
154 /*
155 * Set the orientation for a stream. If o > 0, the stream has wide-
156 * orientation. If o < 0, the stream has byte-orientation.
157 */
158 #define ORIENT(fp, o) do { \
159 if ((fp)->_orientation == 0) \
160 (fp)->_orientation = (o); \
161 } while (0)