/*-
 * 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.
 *
 * Copyright (c) 2011 The FreeBSD Foundation
 * All rights reserved.
 * Portions of this software were developed by David Chisnall
 * under sponsorship from the FreeBSD Foundation.
 *
 * 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.
 *
 *      @(#)local.h     8.3 (Berkeley) 7/3/94
 * $FreeBSD: head/lib/libc/stdio/local.h 234799 2012-04-29 16:28:39Z das $
 */

#include <sys/types.h>  /* for off_t */
#include <string.h>
#include <wchar.h>
#include <locale.h>
#include <xlocale_private.h>

#include "priv_stdio.h"
#include "wcio.h"

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

extern int      _sread(FILE *, char *, int);
extern int      _swrite(FILE *, char const *, int);
extern fpos_t   _sseek(FILE *, fpos_t, int);
extern int      _ftello(FILE *, fpos_t *);
extern int      _fseeko(FILE *, off_t, int, int);
extern int      __fflush(FILE *fp);
extern void     __fcloseall(void);
extern wint_t   __fgetwc_mbs(FILE *, mbstate_t *, int *, locale_t);
extern wint_t   __fputwc(wchar_t, FILE *, locale_t);
extern int      __sflush(FILE *);
extern FILE     *__sfp(void);
extern int      __slbexpand(FILE *, size_t);
extern int      __srefill(FILE *);
extern int      __sread(void *, char *, int);
extern int      __swrite(void *, char const *, int);
extern fpos_t   __sseek(void *, fpos_t, int);
extern int      __sclose(void *);
extern void     __sinit(void);
extern void     _cleanup(void);
extern void     __smakebuf(FILE *);
extern int      __swhatbuf(FILE *, size_t *, int *);
extern int      _fwalk(int (*)(FILE *));
extern int      __svfscanf(FILE *, locale_t, const char *, __va_list);
extern int      __swsetup(FILE *);
extern int      __sflags(const char *, int *);
extern int      __ungetc(int, FILE *);
extern wint_t   __ungetwc(wint_t, FILE *, locale_t);
extern int      __vfprintf(FILE *, locale_t, const char *, __va_list);
extern int      __vfscanf(FILE *, const char *, __va_list);
extern int      __vfwprintf(FILE *, locale_t, const wchar_t *, __va_list);
extern int      __vfwscanf(FILE * __restrict, locale_t, const wchar_t * __restrict,
                    __va_list);
extern size_t   __fread(void * __restrict buf, size_t size, size_t count,
                FILE * __restrict fp);
extern int      __sdidinit;

static inline wint_t
__fgetwc(FILE *fp, locale_t locale)
{
        int nread;
        struct wchar_io_data *wcio;
        mbstate_t *st;

        _SET_ORIENTATION(fp,1);
        wcio = WCIO_GET(fp);

        if (wcio == NULL) {
                return WEOF;
        }
        wcio->wcio_ungetwc_inbuf = 0;
        st = &wcio->wcio_mbstate_out;

        return (__fgetwc_mbs(fp, st, &nread, locale));
}

/*
 * Prepare the given FILE for writing, and return 0 iff it
 * can be written now.  Otherwise, return EOF and set errno.
 */
#define prepwrite(fp) \
        ((((fp)->pub._flags & __SWR) == 0 || \
            ((fp)->_bf._base == NULL && ((fp)->pub._flags & __SSTR) == 0)) && \
         __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; \
}

/*
 * Structure initializations for 'fake' FILE objects.
 */
#define FAKE_FILE {                             \
        .pub._lbfsize = 0,                      \
        .pub._fileno = -1,                      \
        ._fl_mutex = PTHREAD_MUTEX_INITIALIZER, \
}

/*
 * Set the orientation for a stream. If o > 0, the stream has wide-
 * orientation. If o < 0, the stream has byte-orientation.
 */
#define ORIENT(fp, o)   _SET_ORIENTATION(fp, o)