local.h revision 105098
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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)local.h 8.3 (Berkeley) 7/3/94 37 * $FreeBSD: head/lib/libc/stdio/local.h 105098 2002-10-14 11:18:21Z tjr $ 38 */ 39 40#include <sys/types.h> /* for off_t */ 41#include <pthread.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 50extern int _sread(FILE *, char *, int); 51extern int _swrite(FILE *, char const *, int); 52extern fpos_t _sseek(FILE *, fpos_t, int); 53extern int _ftello(FILE *, fpos_t *); 54extern int _fseeko(FILE *, off_t, int, int); 55extern int __fflush(FILE *fp); 56extern wint_t __fgetwc(FILE *); 57extern wint_t __fputwc(wchar_t, FILE *); 58extern int __sflush(FILE *); 59extern FILE *__sfp(void); 60extern int __srefill(FILE *); 61extern int __sread(void *, char *, int); 62extern int __swrite(void *, char const *, int); 63extern fpos_t __sseek(void *, fpos_t, int); 64extern int __sclose(void *); 65extern void __sinit(void); 66extern void _cleanup(void); 67extern void (*__cleanup)(void); 68extern void __smakebuf(FILE *); 69extern int __swhatbuf(FILE *, size_t *, int *); 70extern int _fwalk(int (*)(FILE *)); 71extern int __svfscanf(FILE *, const char *, __va_list); 72extern int __swsetup(FILE *); 73extern int __sflags(const char *, int *); 74extern int __ungetc(int, FILE *); 75extern wint_t __ungetwc(wint_t, FILE *); 76extern int __vfprintf(FILE *, const char *, __va_list); 77extern int __vfscanf(FILE *, const char *, __va_list); 78extern int __vfwprintf(FILE *, const wchar_t *, __va_list); 79extern int __vfwscanf(FILE * __restrict, const wchar_t * __restrict, 80 __va_list); 81 82extern int __sdidinit; 83 84 85/* hold a buncha junk that would grow the ABI */ 86struct __sFILEX { 87 unsigned char *_up; /* saved _p when _p is doing ungetc data */ 88 pthread_mutex_t fl_mutex; /* used for MT-safety */ 89 pthread_t fl_owner; /* current owner */ 90 int fl_count; /* recursive lock count */ 91 int orientation; /* orientation for fwide() */ 92#ifdef notdef 93 /* 94 * XXX These are not used yet -- they will be used to store the 95 * multibyte conversion state for writing and reading when 96 * stateful encodings are supported by the locale framework. 97 */ 98 mbstate_t wstate; /* write conversion state */ 99 mbstate_t rstate; /* read conversion state */ 100#endif 101}; 102 103/* 104 * Return true iff the given FILE cannot be written now. 105 */ 106#define cantwrite(fp) \ 107 ((((fp)->_flags & __SWR) == 0 || \ 108 ((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \ 109 __swsetup(fp)) 110 111/* 112 * Test whether the given stdio file has an active ungetc buffer; 113 * release such a buffer, without restoring ordinary unread data. 114 */ 115#define HASUB(fp) ((fp)->_ub._base != NULL) 116#define FREEUB(fp) { \ 117 if ((fp)->_ub._base != (fp)->_ubuf) \ 118 free((char *)(fp)->_ub._base); \ 119 (fp)->_ub._base = NULL; \ 120} 121 122/* 123 * test for an fgetln() buffer. 124 */ 125#define HASLB(fp) ((fp)->_lb._base != NULL) 126#define FREELB(fp) { \ 127 free((char *)(fp)->_lb._base); \ 128 (fp)->_lb._base = NULL; \ 129} 130 131#define INITEXTRA(fp) { \ 132 (fp)->_extra->_up = NULL; \ 133 (fp)->_extra->fl_mutex = PTHREAD_MUTEX_INITIALIZER; \ 134 (fp)->_extra->fl_owner = NULL; \ 135 (fp)->_extra->fl_count = 0; \ 136 (fp)->_extra->orientation = 0; \ 137 /* memset(&(fp)->_extra->wstate, 0, sizeof(mbstate_t)); */ \ 138 /* memset(&(fp)->_extra->rstate, 0, sizeof(mbstate_t)); */ \ 139} 140 141/* 142 * Set the orientation for a stream. If o > 0, the stream has wide- 143 * orientation. If o < 0, the stream has byte-orientation. 144 */ 145#define ORIENT(fp, o) do { \ 146 if ((fp)->_extra->orientation == 0) \ 147 (fp)->_extra->orientation = (o); \ 148} while (0) 149#ifdef FLOCKFILE 150#define ORIENTLOCK(fp, o) do { \ 151 FLOCKFILE(fp); \ 152 ORIENT(fp, o); \ 153 FUNLOCKFILE(fp); \ 154} while (0) 155#endif 156