usr/src/lib/libc/inc/file64.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*
  28  * This is the header where the internal to libc definition of the FILE
  29  * structure is defined. The exrernal defintion defines the FILE structure
  30  * as an array of longs. This prevents customers from writing code that
  31  * depends upon the implemnetation of stdio. The __fbufsize(3C) man page
  32  * documents a set of routines that customers can use so that they do not
  33  * need access to the FILE structure.
  34  *
  35  * When compiling libc this file MUST be included BEFORE <stdio.h>, and
  36  * any other headers that themselves directly or indirectly include
  37  * <stdio.h>. Failure to do so, will cause the compile of libc to fail,
  38  * since the structure members will not be visible to the stdio routines.
  39  */
  40
  41 #ifndef _FILE64_H
  42 #define _FILE64_H
  43
  44 #pragma ident   "%Z%%M% %I%     %E% SMI"
  45
  46 #include <synch.h>
  47 #include <stdio_tag.h>
  48 #include <wchar_impl.h>
  49
  50 #ifdef  __cplusplus
  51 extern "C" {
  52 #endif
  53
  54 #ifndef _MBSTATE_T
  55 #define _MBSTATE_T
  56 typedef __mbstate_t     mbstate_t;
  57 #endif
  58
  59 #define rmutex_t        mutex_t
  60
  61 #ifdef  _LP64
  62
  63 struct __FILE_TAG {
  64         unsigned char   *_ptr;  /* next character from/to here in buffer */
  65         unsigned char   *_base; /* the buffer */
  66         unsigned char   *_end;  /* the end of the buffer */
  67         ssize_t         _cnt;   /* number of available characters in buffer */
  68         int             _file;  /* UNIX System file descriptor */
  69         unsigned int    _flag;  /* the state of the stream */
  70         rmutex_t        _lock;  /* lock for this structure */
  71         mbstate_t       _state; /* mbstate_t */
  72         char            __fill[32];     /* filler to bring size to 128 bytes */
  73 };
  74
  75 #else
  76
  77 /*
  78  * Stuff missing from our 32-bit FILE struct.
  79  */
  80 struct xFILEdata {
  81         uintptr_t       _magic; /* Check: magic number, must be first */
  82         unsigned char   *_end;  /* the end of the buffer */
  83         rmutex_t        _lock;  /* lock for this structure */
  84         mbstate_t       _state; /* mbstate_t */
  85         int             _altfd; /* alternate fd if > 255 */
  86 };
  87
  88 #define XFILEINITIALIZER        { 0, NULL, RECURSIVEMUTEX, DEFAULTMBSTATE }
  89
  90 #endif  /*      _LP64   */
  91
  92 #ifdef  __cplusplus
  93 }
  94 #endif
  95
  96 #endif  /* _FILE64_H */