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/*-
 * Copyright (c) 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)local.h     8.2 (Berkeley) 1/2/94
 */

/*
 * Information local to this implementation of stdio,
 * in particular, macros and private variables.
 */

int     __sflush __P((FILE *));
FILE    *__sfp __P((void));
int     __srefill __P((FILE *));
int     __sread __P((void *, char *, int));
int     __swrite __P((void *, char const *, int));
fpos_t  __sseek __P((void *, fpos_t, int));
int     __sclose __P((void *));
void    __sinit __P((void));
void    _cleanup __P((void));
void    (*__cleanup) __P((void));
void    __smakebuf __P((FILE *));
int     __swhatbuf __P((FILE *, size_t *, int *));
int     _fwalk __P((int (*)(FILE *)));
int     __swsetup __P((FILE *));
int     __sflags __P((const char *, int *));

extern int __sdidinit;

/*
 * Return true iff the given FILE cannot be written now.
 */
#define cantwrite(fp) \
        ((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
         __swsetup(fp))

/*
 * Test whether the given stdio file has an active ungetc buffer;
 * release such a buffer, without restoring ordinary unread data.
 */
#define HASUB(fp) ((fp)->_ub._base != NULL)
#define FREEUB(fp) { \
        if ((fp)->_ub._base != (fp)->_ubuf) \
                free((char *)(fp)->_ub._base); \
        (fp)->_ub._base = NULL; \
}

/*
 * test for an fgetln() buffer.
 */
#define HASLB(fp) ((fp)->_lb._base != NULL)
#define FREELB(fp) { \
        free((char *)(fp)->_lb._base); \
        (fp)->_lb._base = NULL; \
}