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      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 #include "wcio.h"
     36 #include "fileext.h"
     37 
     38 
     39 /*
     40  * Information local to this implementation of stdio,
     41  * in particular, macros and private variables.
     42  */
     43 
     44 int	__sflush(FILE *);
     45 int	__sflush_locked(FILE *);
     46 FILE	*__sfp(void);
     47 int	__srefill(FILE *);
     48 int	__sread(void *, char *, int);
     49 int	__swrite(void *, const char *, int);
     50 fpos_t	__sseek(void *, fpos_t, int);
     51 int	__sclose(void *);
     52 void	__sinit(void);
     53 void	_cleanup(void);
     54 void	__smakebuf(FILE *);
     55 int	__swhatbuf(FILE *, size_t *, int *);
     56 int	_fwalk(int (*)(FILE *));
     57 int	__swsetup(FILE *);
     58 int	__sflags(const char *, int *);
     59 int	__vfprintf(FILE *, const char *, __va_list);
     60 
     61 extern void __atexit_register_cleanup(void (*)(void));
     62 extern int __sdidinit;
     63 
     64 /*
     65  * Return true if the given FILE cannot be written now.
     66  */
     67 #define	cantwrite(fp) \
     68 	((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
     69 	 __swsetup(fp))
     70 
     71 /*
     72  * Test whether the given stdio file has an active ungetc buffer;
     73  * release such a buffer, without restoring ordinary unread data.
     74  */
     75 #define	HASUB(fp) (_UB(fp)._base != NULL)
     76 #define	FREEUB(fp) { \
     77 	if (_UB(fp)._base != (fp)->_ubuf) \
     78 		free(_UB(fp)._base); \
     79 	_UB(fp)._base = NULL; \
     80 }
     81 
     82 /*
     83  * test for an fgetln() buffer.
     84  */
     85 #define	HASLB(fp) ((fp)->_lb._base != NULL)
     86 #define	FREELB(fp) { \
     87 	free((char *)(fp)->_lb._base); \
     88 	(fp)->_lb._base = NULL; \
     89 }
     90 
     91 #define FLOCKFILE(fp)   do { if (__isthreaded) flockfile(fp); } while (0)
     92 #define FUNLOCKFILE(fp) do { if (__isthreaded) funlockfile(fp); } while (0)
     93