Imported Upstream version 93u+upstream

1 files changed, 126 insertions, 0 deletions

diff --git a/src/lib/libast/include/sfio_t.h b/src/lib/libast/include/sfio_t.h
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+++ b/src/lib/libast/include/sfio_t.h
@@ -0,0 +1,126 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                 Glenn Fowler <gsf@research.att.com>                  *
+*                  David Korn <dgk@research.att.com>                   *
+*                   Phong Vo <kpv@research.att.com>                    *
+*                                                                      *
+***********************************************************************/
+#ifndef _SFIO_T_H
+#define _SFIO_T_H	1
+
+/*	This header file is for library writers who need to know certain
+**	internal info concerning the full Sfio_t structure. Including this
+**	file means that you agree to track closely with sfio development
+**	in case its internal architecture is changed.
+**
+**	Written by Kiem-Phong Vo
+*/
+
+/* the parts of Sfio_t private to sfio functions */
+#define _SFIO_PRIVATE \
+	Sfoff_t			extent;	/* current file	size		*/ \
+	Sfoff_t			here;	/* current physical location	*/ \
+	unsigned char		getr;	/* the last sfgetr separator 	*/ \
+	unsigned char		tiny[1];/* for unbuffered read stream	*/ \
+	unsigned short		bits;	/* private flags		*/ \
+	unsigned int		mode;	/* current io mode		*/ \
+	struct _sfdisc_s*	disc;	/* discipline			*/ \
+	struct _sfpool_s*	pool;	/* the pool containing this	*/ \
+	struct _sfrsrv_s*	rsrv;	/* reserved buffer		*/ \
+	struct _sfproc_s*	proc;	/* coprocess id, etc.		*/ \
+	Void_t*			mutex;	/* mutex for thread-safety	*/ \
+	Void_t*			stdio;	/* stdio FILE if any		*/ \
+	Sfoff_t			lpos;	/* last seek position		*/ \
+	size_t			iosz;	/* preferred size for I/O	*/ \
+	size_t			blksz;	/* preferred block size		*/ \
+	Void_t*			fill[1];/* modest expansion		*/
+
+#include	"sfio.h"
+
+/* mode bit to indicate that the structure hasn't been initialized */
+#define SF_INIT		0000004
+#define SF_DCDOWN	00010000
+
+/* short-hand for common stream types */
+#define SF_RDWR		(SF_READ|SF_WRITE)
+#define SF_RDSTR	(SF_READ|SF_STRING)
+#define SF_WRSTR	(SF_WRITE|SF_STRING)
+#define SF_RDWRSTR	(SF_RDWR|SF_STRING)
+
+/* for static initialization of an Sfio_t structure */
+#define SFNEW(data,size,file,type,disc,mutex)	\
+	{ (unsigned char*)(data),			/* next		*/ \
+	  (unsigned char*)(data),			/* endw		*/ \
+	  (unsigned char*)(data),			/* endr		*/ \
+	  (unsigned char*)(data),			/* endb		*/ \
+	  (Sfio_t*)0,					/* push		*/ \
+	  (unsigned short)((type)&SF_FLAGS),		/* flags	*/ \
+	  (short)(file),				/* file		*/ \
+	  (unsigned char*)(data),			/* data		*/ \
+	  (ssize_t)(size),				/* size		*/ \
+	  (ssize_t)(-1),				/* val		*/ \
+	  (Sfoff_t)0,					/* extent	*/ \
+	  (Sfoff_t)0,					/* here		*/ \
+	  0,						/* getr		*/ \
+	  {0},						/* tiny		*/ \
+	  0,						/* bits		*/ \
+	  (unsigned int)(((type)&(SF_RDWR))|SF_INIT),	/* mode		*/ \
+	  (struct _sfdisc_s*)(disc),			/* disc		*/ \
+	  (struct _sfpool_s*)0,				/* pool		*/ \
+	  (struct _sfrsrv_s*)0,				/* rsrv		*/ \
+	  (struct _sfproc_s*)0,				/* proc		*/ \
+	  (mutex),					/* mutex	*/ \
+	  (Void_t*)0,					/* stdio	*/ \
+	  (Sfoff_t)0,					/* lpos		*/ \
+	  (size_t)0					/* iosz		*/ \
+	}
+
+/* function to clear an Sfio_t structure */
+#define SFCLEAR(f,mtx) \
+	( (f)->next = (unsigned char*)0,		/* next		*/ \
+	  (f)->endw = (unsigned char*)0,		/* endw		*/ \
+	  (f)->endr = (unsigned char*)0,		/* endr		*/ \
+	  (f)->endb = (unsigned char*)0,		/* endb		*/ \
+	  (f)->push = (Sfio_t*)0,			/* push		*/ \
+	  (f)->flags = (unsigned short)0,		/* flags	*/ \
+	  (f)->file = -1,				/* file		*/ \
+	  (f)->data = (unsigned char*)0,		/* data		*/ \
+	  (f)->size = (ssize_t)(-1),			/* size		*/ \
+	  (f)->val = (ssize_t)(-1),			/* val		*/ \
+	  (f)->extent = (Sfoff_t)(-1),			/* extent	*/ \
+	  (f)->here = (Sfoff_t)0,			/* here		*/ \
+	  (f)->getr = 0,				/* getr		*/ \
+	  (f)->tiny[0] = 0,				/* tiny		*/ \
+	  (f)->bits = 0,				/* bits		*/ \
+	  (f)->mode = 0,				/* mode		*/ \
+	  (f)->disc = (struct _sfdisc_s*)0,		/* disc		*/ \
+	  (f)->pool = (struct _sfpool_s*)0,		/* pool		*/ \
+	  (f)->rsrv = (struct _sfrsrv_s*)0,		/* rsrv		*/ \
+	  (f)->proc = (struct _sfproc_s*)0,		/* proc		*/ \
+	  (f)->mutex = (mtx),				/* mutex	*/ \
+	  (f)->stdio = (Void_t*)0,			/* stdio	*/ \
+	  (f)->lpos = (Sfoff_t)0,			/* lpos		*/ \
+	  (f)->iosz = (size_t)0				/* iosz		*/ \
+	)
+
+/* expose next stream inside discipline function; state saved in int f */
+#define SFDCNEXT(sp,f)	(((f)=(sp)->bits&SF_DCDOWN),(sp)->bits|=SF_DCDOWN)
+
+/* restore SFDCNEXT() state from int f */
+#define SFDCPREV(sp,f)	((f)?(0):((sp)->bits&=~SF_DCDOWN))
+
+#endif /* _SFIO_T_H */