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att
GitHub Repository: att/ast
 Path: blob/master/src/lib/libvcodex/vcsfio.h
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/***********************************************************************

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*                                                                      *

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*               This software is part of the ast package               *

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*          Copyright (c) 2003-2011 AT&T Intellectual Property          *

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*                      and is licensed under the                       *

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*                 Eclipse Public License, Version 1.0                  *

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*                    by AT&T Intellectual Property                     *

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*                                                                      *

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*                A copy of the License is available at                 *

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*          http://www.eclipse.org/org/documents/epl-v10.html           *

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*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

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*                                                                      *

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*              Information and Software Systems Research               *

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*                            AT&T Research                             *

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*                           Florham Park NJ                            *

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*                                                                      *

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*                   Phong Vo <[email protected]>                    *

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*                                                                      *

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***********************************************************************/

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#ifndef _VCSFIO_H

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#define _VCSFIO_H	1

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#if _PACKAGE_ast

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#include <vcodex.h>

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#endif

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/*	FILE I/O.

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**

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**	Written by Kiem-Phong Vo ([email protected])

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*/

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#if _SFIO_H /* let Sfio take care of I/O */

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#define Vcsfio_t	Sfio_t

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#define vcsfread	sfread

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#define vcsfwrite	sfwrite

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#define vcsfsync	sfsync

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#define vcsfclose	sfclose

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#else /* above functions will be explicitly provided */

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#define Vcsfio_t	Void_t

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#endif /*_SFIO_H*/

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/* header processing modes */

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#define VCSF_VCDIFF	000001	/* output RFC3284 VCDIFF header	*/

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#define VCSF_PLAIN	000002	/* no header to be output	*/

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#define VCSF_TRANS	000004	/* set trans on VC_DECODE	*/

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#define VCSF_FREE	000010	/* free sfdt on disc pop	*/

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/* application-defined function to process error messages */

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typedef void		(*Vcsferror_f)_ARG_((const char*));

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/* data passed to vcsfio() to initialize a stream */

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typedef struct _vcsfdata_s

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{	int		type;	/* various types of processing	*/

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	char*		trans;	/* transformation specification	*/

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	char*		window;	/* window specification		*/

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	char*		source;	/* source file to delta against	*/

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	Vcsferror_f	errorf;	/* to process errors		*/

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} Vcsfdata_t;

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_BEGIN_EXTERNS_

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#if _BLD_vcodex && defined(__EXPORT__)

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#define extern	__EXPORT__

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#endif

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extern Vcsfio_t*	vcsfio _ARG_((Sfio_t*, Vcsfdata_t*, int));

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#if !_SFIO_H

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extern ssize_t		vcsfread _ARG_((Vcsfio_t*, Void_t*, size_t));

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extern ssize_t		vcsfwrite _ARG_((Vcsfio_t*, Void_t*, size_t));

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extern int		vcsfsync _ARG_((Vcsfio_t*));

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extern int		vcsfclose _ARG_((Vcsfio_t*));

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#endif

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#undef	extern

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_END_EXTERNS_

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#endif /*_VCSFIO_H*/

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