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92 lines
3.4 KiB
92 lines
3.4 KiB
/***
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*file2.h - auxiliary file structure used internally by file run-time routines
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*
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* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* This file defines the auxiliary file structure used internally by
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* the file run time routines.
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*
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* [Internal]
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*
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*Revision History:
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* 06-29-87 JCR Removed _OLD_IOLBF/_OLD_IOFBF and associated lbuf macro.
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* 09-28-87 JCR Added _iob_index(); modified ybuf() and tmpnum() to use it.
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* 06-03-88 JCR Added _iob2_ macro; modified ybuf()/tmpnum()/_iob_index;
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* also padded FILE2 definition to be the same size as FILE.
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* 06-10-88 JCR Added ybuf2()/bigbuf2()/anybuf2()
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* 06-14-88 JCR Added (FILE *) casts to _iob_index() macro
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* 06-29-88 JCR Added _IOFLRTN bit (flush stream on per routine basis)
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* 08-18-88 GJF Revised to also work with the 386 (small model only).
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* 12-05-88 JCR Added _IOCTRLZ bit (^Z encountered by lowio read)
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* 04-11-89 JCR Removed _IOUNGETC bit (no longer needed)
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* 07-27-89 GJF Cleanup, now specific to the 386. Struct field
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* alignment is now protected by pack pragma.
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* 10-30-89 GJF Fixed copyright
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* 02-16-90 GJF _iob[], _iob2[] merge
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* 02-21-90 GJF Restored _iob_index() macro
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* 02-28-90 GJF Added #ifndef _INC_FILE2 stuff. Also, removed some
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* (now) useless preprocessor directives.
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* 07-11-90 SBM Added _IOCOMMIT bit (lowio commit on fflush call)
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* 03-11-92 GJF Removed _tmpnum() macro for Win32.
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* 06-03-92 KRS Added extern "C" stuff.
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* 02-23-93 SKS Update copyright to 1993
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* 06-22-93 GJF Added _IOSETVBUF flag.
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* 09-06-94 CFW Remove Cruiser support.
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* 02-14-95 CFW Clean up Mac merge.
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* 03-06-95 GJF Removed _iob_index().
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* 03-29-95 CFW Add error message to internal headers.
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* 12-14-95 JWM Add "#pragma once".
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* 02-24-97 GJF Detab-ed.
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*
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****/
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#if _MSC_VER > 1000 /*IFSTRIP=IGN*/
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#pragma once
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#endif
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#ifndef _INC_FILE2
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#define _INC_FILE2
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#ifndef _CRTBLD
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/*
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* This is an internal C runtime header file. It is used when building
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* the C runtimes only. It is not to be used as a public header file.
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*/
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#error ERROR: Use of C runtime library internal header file.
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#endif /* _CRTBLD */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Additional _iobuf[]._flag values
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*
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* _IOSETVBUF - Indicates file was buffered via a setvbuf (or setbuf call).
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* Currently used ONLY in _filbuf.c, _getbuf.c, fseek.c and
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* setvbuf.c, to disable buffer resizing on "random access"
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* files if the buffer was user-installed.
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*/
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#define _IOYOURBUF 0x0100
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#define _IOSETVBUF 0x0400
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#define _IOFEOF 0x0800
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#define _IOFLRTN 0x1000
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#define _IOCTRLZ 0x2000
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#define _IOCOMMIT 0x4000
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/* General use macros */
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#define inuse(s) ((s)->_flag & (_IOREAD|_IOWRT|_IORW))
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#define mbuf(s) ((s)->_flag & _IOMYBUF)
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#define nbuf(s) ((s)->_flag & _IONBF)
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#define ybuf(s) ((s)->_flag & _IOYOURBUF)
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#define bigbuf(s) ((s)->_flag & (_IOMYBUF|_IOYOURBUF))
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#define anybuf(s) ((s)->_flag & (_IOMYBUF|_IONBF|_IOYOURBUF))
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#ifdef __cplusplus
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}
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#endif
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#endif /* _INC_FILE2 */
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