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local.h revision 1.28 
      1 /*	$NetBSD: local.h,v 1.28 2010/10/23 14:12:50 christos 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  *	@(#)local.h	8.3 (Berkeley) 7/3/94
     35  */
     36 
     37 #include "wcio.h"
     38 #include "fileext.h"
     39 
     40 /*
     41  * Information local to this implementation of stdio,
     42  * in particular, macros and private variables.
     43  */
     44 
     45 extern int	__sflush __P((FILE *));
     46 extern FILE	*__sfp __P((void));
     47 extern void	__sfpinit __P((FILE *));
     48 extern int	__srefill __P((FILE *));
     49 extern int	__sread __P((void *, char *, int));
     50 extern int	__swrite __P((void *, char const *, int));
     51 extern fpos_t	__sseek __P((void *, fpos_t, int));
     52 extern int	__sclose __P((void *));
     53 extern void	__sinit __P((void));
     54 extern void	_cleanup __P((void));
     55 extern void	(*__cleanup) __P((void));
     56 extern void	__smakebuf __P((FILE *));
     57 extern int	__swhatbuf __P((FILE *, size_t *, int *));
     58 extern int	_fwalk __P((int (*)(FILE *)));
     59 extern char	*_mktemp __P((char *));
     60 extern int	__swsetup __P((FILE *));
     61 extern int	__sflags __P((const char *, int *));
     62 extern int	__svfscanf __P((FILE * __restrict, const char * __restrict,
     63 		    _BSD_VA_LIST_))
     64 		    __attribute__((__format__(__scanf__, 2, 0)));
     65 extern int	__svfscanf_unlocked __P((FILE * __restrict, const char * __restrict,
     66 		    _BSD_VA_LIST_))
     67 		    __attribute__((__format__(__scanf__, 2, 0)));
     68 extern int	__vfprintf_unlocked __P((FILE * __restrict, const char * __restrict,
     69 		    _BSD_VA_LIST_));
     70 
     71 
     72 extern int	__sdidinit;
     73 
     74 extern int	__gettemp __P((char *, int *, int));
     75 
     76 extern wint_t	__fgetwc_unlock __P((FILE *));
     77 extern wint_t	__fputwc_unlock __P((wchar_t, FILE *));
     78 
     79 extern ssize_t	__getdelim(char **__restrict, size_t *__restrict, int,
     80     FILE *__restrict);
     81 extern char	*__fgetstr __P((FILE * __restrict, size_t * __restrict, int));
     82 extern int 	 __vfwprintf_unlocked __P((FILE *, const wchar_t *,
     83     _BSD_VA_LIST_));
     84 extern int	 __vfwscanf_unlocked __P((FILE * __restrict,
     85     const wchar_t * __restrict, _BSD_VA_LIST_));
     86 
     87 /*
     88  * Return true iff 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((char *)_UB(fp)._base); \
    102 	_UB(fp)._base = NULL; \
    103 }
    104 
    105 /*
    106  * test for an fgetln() buffer.
    107  */
    108 #define	FREELB(fp) { \
    109 	free(_EXT(fp)->_fgetstr_buf); \
    110 	_EXT(fp)->_fgetstr_buf = NULL; \
    111 	_EXT(fp)->_fgetstr_len = 0; \
    112 }
    113 
    114 extern void __flockfile_internal __P((FILE *, int));
    115 extern void __funlockfile_internal __P((FILE *, int));
    116 
    117 /*
    118  * Detect if the current file position fits in a long int.
    119  */
    120 #define _FPOS_OVERFLOW(pos) (/*CONSTCOND*/sizeof(fpos_t) > sizeof(long) && \
    121 	((pos) & (~0ULL << ((sizeof(fpos_t) - sizeof(long)) * NBBY))) != 0)
    122