/*      $OpenBSD: local.h,v 1.27 2025/08/08 15:58:53 yasuoka Exp $      */

/*-
 * 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. 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.
 */

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

#include <wchar.h> 
#include "thread_private.h"

__BEGIN_HIDDEN_DECLS
void    _cleanup(void);
int     _fwalk(int (*)(FILE *));
int     __sflush(FILE *);
int     __sflush_locked(FILE *);
FILE    *__sfp(void);
int     __srefill(FILE *);
int     __sread(void *, char *, int);
int     __swrite(void *, const char *, int);
fpos_t  __sseek(void *, fpos_t, int);
int     __sclose(void *);
void    __sinit(void);
void    __smakebuf(FILE *);
int     __swhatbuf(FILE *, size_t *, int *);
int     __swsetup(FILE *);
int     __sflags(const char *, int *);
wint_t __fgetwc_unlock(FILE *);
wint_t  __ungetwc(wint_t, FILE *);
int     __vfprintf(FILE *, const char *, __va_list);
int     __svfscanf(FILE * __restrict, const char * __restrict, __va_list);
int     __vfwprintf(FILE * __restrict, const wchar_t * __restrict, __va_list);
int     __vfwscanf(FILE * __restrict, const wchar_t * __restrict, __va_list);

extern int __sdidinit;
__END_HIDDEN_DECLS

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

/* XXX reduce noise during the conversion */
#define _UB(fp) (fp)->_ub

#define _SET_ORIENTATION(fp, mode)                              \
do {                                                            \
        if (((fp)->_flags & (__SONW|__SOWD)) == 0)              \
               (fp)->_flags |= ((mode) > 0 ? __SOWD : __SONW);  \
} while (0)

/* initializer for function-local FILEs */
#define FILEINIT(flags) \
    { ._flags = (flags), ._file = -1, ._lock = __RCMTX_INITIALIZER() }

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

#define FLOCKFILE(fp)                                                   \
        do {                                                            \
                if (__isthreaded)                                       \
                        __rcmtx_enter(&(fp)->_lock);                    \
        } while (0)
#define FUNLOCKFILE(fp)                                                 \
        do {                                                            \
                if (__isthreaded)                                       \
                        __rcmtx_leave(&(fp)->_lock);                    \
        } while (0)