db.1.85/PORT/bsdi.1.0/local/local.h

   1 /*-
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * 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. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)local.h     5.3 (Berkeley) 5/6/93
  37  */
  38
  39 /*
  40  * Information local to this implementation of stdio,
  41  * in particular, macros and private variables.
  42  */
  43
  44 int     __sflush __P((FILE *));
  45 FILE    *__sfp __P((void));
  46 int     __srefill __P((FILE *));
  47 int     __sread __P((void *, char *, int));
  48 int     __swrite __P((void *, char const *, int));
  49 fpos_t  __sseek __P((void *, fpos_t, int));
  50 int     __sclose __P((void *));
  51 void    __sinit __P((void));
  52 void    _cleanup __P((void));
  53 void    (*__cleanup) __P((void));
  54 void    __smakebuf __P((FILE *));
  55 int     __swhatbuf __P((FILE *, size_t *, int *));
  56 int     _fwalk __P((int (*)(FILE *)));
  57 int     __swsetup __P((FILE *));
  58 int     __sflags __P((const char *, int *));
  59
  60 extern int __sdidinit;
  61
  62 /*
  63  * Return true iff the given FILE cannot be written now.
  64  */
  65 #define cantwrite(fp) \
  66         ((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
  67          __swsetup(fp))
  68
  69 /*
  70  * Test whether the given stdio file has an active ungetc buffer;
  71  * release such a buffer, without restoring ordinary unread data.
  72  */
  73 #define HASUB(fp) ((fp)->_ub._base != NULL)
  74 #define FREEUB(fp) { \
  75         if ((fp)->_ub._base != (fp)->_ubuf) \
  76                 free((char *)(fp)->_ub._base); \
  77         (fp)->_ub._base = NULL; \
  78 }
  79
  80 /*
  81  * test for an fgetline() buffer.
  82  */
  83 #define HASLB(fp) ((fp)->_lb._base != NULL)
  84 #define FREELB(fp) { \
  85         free((char *)(fp)->_lb._base); \
  86         (fp)->_lb._base = NULL; \
  87 }