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   1 /*-
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Chris Torek.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)local.h     8.3 (Berkeley) 7/3/94
  33  */
  35 #include <sys/cdefs.h>
  37 /*
  38  * Information local to this implementation of stdio,
  39  * in particular, macros and private variables.
  40  */
__BEGIN_DECLS
  43 int     __sflush(FILE *);
FILE    *__sfp(void);
  45 int     __srefill(FILE *);
  46 int     __sread(FILE *, char *, int);
  47 int     __swrite(FILE *, char const *, int);
fpos_t  __sseek(FILE *, fpos_t, int);
  49 int     __sclose(FILE *);
  50 void    __sinit(void);
  51 void    _cleanup(void);
  52 void    (*__cleanup)(void);
  53 void    __smakebuf(FILE *);
  54 int     _fwalk(int (*)(FILE *));
  55 int     __swsetup(FILE *);
  56 int     __sflags(const char *, int *);
  57 int     __sdidinit;
__END_DECLS
  60 /*
  61  * Return true iff the given FILE cannot be written now.
  62  */
  63 #define cantwrite(fp) \
  64         ((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
__swsetup(fp))
  67 /*
  68  * Test whether the given stdio file has an active ungetc buffer;
  69  * release such a buffer, without restoring ordinary unread data.
  70  */
  71 #define HASUB(fp) ((fp)->_ub._base != NULL)
  72 #define FREEUB(fp) { \
  73         (fp)->_ub._base = NULL; \
  74 }