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local.h revision 1.5 
      1 /*	$NetBSD: local.h,v 1.5 1995/02/02 02:10:05 jtc 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. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	@(#)local.h	8.2 (Berkeley) 1/2/94
     39  */
     40 
     41 /*
     42  * Information local to this implementation of stdio,
     43  * in particular, macros and private variables.
     44  */
     45 
     46 int	__sflush __P((FILE *));
     47 FILE	*__sfp __P((void));
     48 int	__srefill __P((FILE *));
     49 int	__sread __P((void *, char *, int));
     50 int	__swrite __P((void *, char const *, int));
     51 fpos_t	__sseek __P((void *, fpos_t, int));
     52 int	__sclose __P((void *));
     53 void	__sinit __P((void));
     54 void	_cleanup __P((void));
     55 void	(*__cleanup) __P((void));
     56 void	__smakebuf __P((FILE *));
     57 int	__swhatbuf __P((FILE *, size_t *, int *));
     58 int	_fwalk __P((int (*)(FILE *)));
     59 int	__swsetup __P((FILE *));
     60 int	__sflags __P((const char *, int *));
     61 
     62 extern int __sdidinit;
     63 
     64 /*
     65  * Return true iff 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) ((fp)->_ub._base != NULL)
     76 #define	FREEUB(fp) { \
     77 	if ((fp)->_ub._base != (fp)->_ubuf) \
     78 		free((char *)(fp)->_ub._base); \
     79 	(fp)->_ub._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