[unix-history] / lib / librpc / rpc / xdr.h

/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 * 
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 * 
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 * 
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 * 
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 * 
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 *
 *	from: @(#)xdr.h 1.19 87/04/22 SMI
 *	from: @(#)xdr.h	2.2 88/07/29 4.0 RPCSRC
 *	$Id: xdr.h,v 1.3 1993/08/01 18:45:49 mycroft Exp $
 */

/*
 * xdr.h, External Data Representation Serialization Routines.
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 */

#ifndef _RPC_XDR_H
#define _RPC_XDR_H
#include <sys/cdefs.h>

/*
 * XDR provides a conventional way for converting between C data
 * types and an external bit-string representation.  Library supplied
 * routines provide for the conversion on built-in C data types.  These
 * routines and utility routines defined here are used to help implement
 * a type encode/decode routine for each user-defined type.
 *
 * Each data type provides a single procedure which takes two arguments:
 *
 *	bool_t
 *	xdrproc(xdrs, argresp)
 *		XDR *xdrs;
 *		<type> *argresp;
 *
 * xdrs is an instance of a XDR handle, to which or from which the data
 * type is to be converted.  argresp is a pointer to the structure to be
 * converted.  The XDR handle contains an operation field which indicates
 * which of the operations (ENCODE, DECODE * or FREE) is to be performed.
 *
 * XDR_DECODE may allocate space if the pointer argresp is null.  This
 * data can be freed with the XDR_FREE operation.
 *
 * We write only one procedure per data type to make it easy
 * to keep the encode and decode procedures for a data type consistent.
 * In many cases the same code performs all operations on a user defined type,
 * because all the hard work is done in the component type routines.
 * decode as a series of calls on the nested data types.
 */

/*
 * Xdr operations.  XDR_ENCODE causes the type to be encoded into the
 * stream.  XDR_DECODE causes the type to be extracted from the stream.
 * XDR_FREE can be used to release the space allocated by an XDR_DECODE
 * request.
 */
enum xdr_op {
	XDR_ENCODE=0,
	XDR_DECODE=1,
	XDR_FREE=2
};

/*
 * This is the number of bytes per unit of external data.
 */
#define BYTES_PER_XDR_UNIT	(4)
#define RNDUP(x)  ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \
		    * BYTES_PER_XDR_UNIT)

/*
 * A xdrproc_t exists for each data type which is to be encoded or decoded.
 *
 * The second argument to the xdrproc_t is a pointer to an opaque pointer.
 * The opaque pointer generally points to a structure of the data type
 * to be decoded.  If this pointer is 0, then the type routines should
 * allocate dynamic storage of the appropriate size and return it.
 * bool_t	(*xdrproc_t)(XDR *, caddr_t *);
 */
typedef	bool_t (*xdrproc_t)();

/*
 * The XDR handle.
 * Contains operation which is being applied to the stream,
 * an operations vector for the paticular implementation (e.g. see xdr_mem.c),
 * and two private fields for the use of the particular impelementation.
 */
typedef struct {
	enum xdr_op	x_op;		/* operation; fast additional param */
	struct xdr_ops {
		bool_t	(*x_getlong)();	/* get a long from underlying stream */
		bool_t	(*x_putlong)();	/* put a long to " */
		bool_t	(*x_getbytes)();/* get some bytes from " */
		bool_t	(*x_putbytes)();/* put some bytes to " */
		u_int	(*x_getpostn)();/* returns bytes off from beginning */
		bool_t  (*x_setpostn)();/* lets you reposition the stream */
		long *	(*x_inline)();	/* buf quick ptr to buffered data */
		void	(*x_destroy)();	/* free privates of this xdr_stream */
	} *x_ops;
	caddr_t 	x_public;	/* users' data */
	caddr_t		x_private;	/* pointer to private data */
	caddr_t 	x_base;		/* private used for position info */
	int		x_handy;	/* extra private word */
} XDR;

/*
 * Operations defined on a XDR handle
 *
 * XDR		*xdrs;
 * long		*longp;
 * caddr_t	 addr;
 * u_int	 len;
 * u_int	 pos;
 */
#define XDR_GETLONG(xdrs, longp)			\
	(*(xdrs)->x_ops->x_getlong)(xdrs, longp)
#define xdr_getlong(xdrs, longp)			\
	(*(xdrs)->x_ops->x_getlong)(xdrs, longp)

#define XDR_PUTLONG(xdrs, longp)			\
	(*(xdrs)->x_ops->x_putlong)(xdrs, longp)
#define xdr_putlong(xdrs, longp)			\
	(*(xdrs)->x_ops->x_putlong)(xdrs, longp)

#define XDR_GETBYTES(xdrs, addr, len)			\
	(*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)
#define xdr_getbytes(xdrs, addr, len)			\
	(*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)

#define XDR_PUTBYTES(xdrs, addr, len)			\
	(*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)
#define xdr_putbytes(xdrs, addr, len)			\
	(*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)

#define XDR_GETPOS(xdrs)				\
	(*(xdrs)->x_ops->x_getpostn)(xdrs)
#define xdr_getpos(xdrs)				\
	(*(xdrs)->x_ops->x_getpostn)(xdrs)

#define XDR_SETPOS(xdrs, pos)				\
	(*(xdrs)->x_ops->x_setpostn)(xdrs, pos)
#define xdr_setpos(xdrs, pos)				\
	(*(xdrs)->x_ops->x_setpostn)(xdrs, pos)

#define	XDR_INLINE(xdrs, len)				\
	(*(xdrs)->x_ops->x_inline)(xdrs, len)
#define	xdr_inline(xdrs, len)				\
	(*(xdrs)->x_ops->x_inline)(xdrs, len)

#define	XDR_DESTROY(xdrs)				\
	if ((xdrs)->x_ops->x_destroy) 			\
		(*(xdrs)->x_ops->x_destroy)(xdrs)
#define	xdr_destroy(xdrs)				\
	if ((xdrs)->x_ops->x_destroy) 			\
		(*(xdrs)->x_ops->x_destroy)(xdrs)

/*
 * Support struct for discriminated unions.
 * You create an array of xdrdiscrim structures, terminated with
 * a entry with a null procedure pointer.  The xdr_union routine gets
 * the discriminant value and then searches the array of structures
 * for a matching value.  If a match is found the associated xdr routine
 * is called to handle that part of the union.  If there is
 * no match, then a default routine may be called.
 * If there is no match and no default routine it is an error.
 */
#define NULL_xdrproc_t ((xdrproc_t)0)
struct xdr_discrim {
	int	value;
	xdrproc_t proc;
};

/*
 * In-line routines for fast encode/decode of primitve data types.
 * Caveat emptor: these use single memory cycles to get the
 * data from the underlying buffer, and will fail to operate
 * properly if the data is not aligned.  The standard way to use these
 * is to say:
 *	if ((buf = XDR_INLINE(xdrs, count)) == NULL)
 *		return (FALSE);
 *	<<< macro calls >>>
 * where ``count'' is the number of bytes of data occupied
 * by the primitive data types.
 *
 * N.B. and frozen for all time: each data type here uses 4 bytes
 * of external representation.
 */
#define IXDR_GET_LONG(buf)		((long)ntohl((u_long)*(buf)++))
#define IXDR_PUT_LONG(buf, v)		(*(buf)++ = (long)htonl((u_long)v))

#define IXDR_GET_BOOL(buf)		((bool_t)IXDR_GET_LONG(buf))
#define IXDR_GET_ENUM(buf, t)		((t)IXDR_GET_LONG(buf))
#define IXDR_GET_U_LONG(buf)		((u_long)IXDR_GET_LONG(buf))
#define IXDR_GET_SHORT(buf)		((short)IXDR_GET_LONG(buf))
#define IXDR_GET_U_SHORT(buf)		((u_short)IXDR_GET_LONG(buf))

#define IXDR_PUT_BOOL(buf, v)		IXDR_PUT_LONG((buf), ((long)(v)))
#define IXDR_PUT_ENUM(buf, v)		IXDR_PUT_LONG((buf), ((long)(v)))
#define IXDR_PUT_U_LONG(buf, v)		IXDR_PUT_LONG((buf), ((long)(v)))
#define IXDR_PUT_SHORT(buf, v)		IXDR_PUT_LONG((buf), ((long)(v)))
#define IXDR_PUT_U_SHORT(buf, v)	IXDR_PUT_LONG((buf), ((long)(v)))

/*
 * These are the "generic" xdr routines.
 */
__BEGIN_DECLS
extern bool_t	xdr_void	__P((void));
extern bool_t	xdr_int		__P((XDR *, int *));
extern bool_t	xdr_u_int	__P((XDR *, u_int *));
extern bool_t	xdr_long	__P((XDR *, long *));
extern bool_t	xdr_u_long	__P((XDR *, u_long *));
extern bool_t	xdr_short	__P((XDR *, short *));
extern bool_t	xdr_u_short	__P((XDR *, u_short *));
extern bool_t	xdr_bool	__P((XDR *, bool_t *));
extern bool_t	xdr_enum	__P((XDR *, enum_t *));
extern bool_t	xdr_array	__P((XDR *, char **, u_int *, u_int, u_int, xdrproc_t));
extern bool_t	xdr_bytes	__P((XDR *, char **, u_int *, u_int));
extern bool_t	xdr_opaque	__P((XDR *, caddr_t, u_int));
extern bool_t	xdr_string	__P((XDR *, char **, u_int));
extern bool_t	xdr_union	__P((XDR *, enum_t *, char *, struct xdr_discrim *, xdrproc_t));
extern bool_t	xdr_char	__P((XDR *, char *));
extern bool_t	xdr_u_char	__P((XDR *, char *));
extern bool_t	xdr_vector	__P((XDR *, char *, u_int, u_int, xdrproc_t));
extern bool_t	xdr_float	__P((XDR *, float *));
extern bool_t	xdr_double	__P((XDR *, double *));
extern bool_t	xdr_reference	__P((XDR *, caddr_t *, u_int, xdrproc_t));
extern bool_t	xdr_pointer	__P((XDR *, caddr_t *, u_int, xdrproc_t));
extern bool_t	xdr_wrapstring	__P((XDR *, char **));
extern void	xdr_free 	__P((xdrproc_t, char *));
__END_DECLS

/*
 * Common opaque bytes objects used by many rpc protocols;
 * declared here due to commonality.
 */
#define MAX_NETOBJ_SZ 1024 
struct netobj {
	u_int	n_len;
	char	*n_bytes;
};
typedef struct netobj netobj;
extern bool_t   xdr_netobj();

/*
 * These are the public routines for the various implementations of
 * xdr streams.
 */
__BEGIN_DECLS
/* XDR using memory buffers */
extern void   xdrmem_create	__P((XDR *, char *, u_int, enum xdr_op));

#ifdef _STDIO_H_
/* XDR using stdio library */
extern void   xdrstdio_create	__P((XDR *, FILE *, enum xdr_op));
#endif

/* XDR pseudo records for tcp */
extern void   xdrrec_create	__P((XDR *, u_int, u_int, char *, int (*)(), int (*)()));

/* make end of xdr record */
extern bool_t xdrrec_endofrecord __P((XDR *, int));

/* move to beginning of next record */
extern bool_t xdrrec_skiprecord	__P((XDR *));

/* true if no more input */
extern bool_t xdrrec_eof	__P((XDR *));
__END_DECLS

#endif /* !_RPC_XDR_H */
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
	3	* unrestricted use provided that this legend is included on all tape
	4	* media and as a part of the software program in whole or part. Users
	5	* may copy or modify Sun RPC without charge, but are not authorized
	6	* to license or distribute it to anyone else except as part of a product or
	7	* program developed by the user.
	8	*
	9	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
	10	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
	11	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
	12	*
	13	* Sun RPC is provided with no support and without any obligation on the
	14	* part of Sun Microsystems, Inc. to assist in its use, correction,
	15	* modification or enhancement.
	16	*
	17	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
	18	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
	19	* OR ANY PART THEREOF.
	20	*
	21	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
	22	* or profits or other special, indirect and consequential damages, even if
	23	* Sun has been advised of the possibility of such damages.
	24	*
	25	* Sun Microsystems, Inc.
	26	* 2550 Garcia Avenue
	27	* Mountain View, California 94043
d2bc008e C	28	*
	29	* from: @(#)xdr.h 1.19 87/04/22 SMI
	30	* from: @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC
	31	* $Id: xdr.h,v 1.3 1993/08/01 18:45:49 mycroft Exp $
15637ed4	32	*/
15637ed4 RG	33
	34	/*
	35	* xdr.h, External Data Representation Serialization Routines.
	36	*
	37	* Copyright (C) 1984, Sun Microsystems, Inc.
	38	*/
	39
d2bc008e C	40	#ifndef _RPC_XDR_H
	41	#define _RPC_XDR_H
	42	#include <sys/cdefs.h>
15637ed4 RG	43
	44	/*
	45	* XDR provides a conventional way for converting between C data
	46	* types and an external bit-string representation. Library supplied
	47	* routines provide for the conversion on built-in C data types. These
	48	* routines and utility routines defined here are used to help implement
	49	* a type encode/decode routine for each user-defined type.
	50	*
	51	* Each data type provides a single procedure which takes two arguments:
	52	*
	53	* bool_t
	54	* xdrproc(xdrs, argresp)
	55	* XDR *xdrs;
	56	* <type> *argresp;
	57	*
	58	* xdrs is an instance of a XDR handle, to which or from which the data
	59	* type is to be converted. argresp is a pointer to the structure to be
	60	* converted. The XDR handle contains an operation field which indicates
	61	* which of the operations (ENCODE, DECODE * or FREE) is to be performed.
	62	*
	63	* XDR_DECODE may allocate space if the pointer argresp is null. This
	64	* data can be freed with the XDR_FREE operation.
	65	*
	66	* We write only one procedure per data type to make it easy
	67	* to keep the encode and decode procedures for a data type consistent.
	68	* In many cases the same code performs all operations on a user defined type,
	69	* because all the hard work is done in the component type routines.
	70	* decode as a series of calls on the nested data types.
	71	*/
	72
	73	/*
	74	* Xdr operations. XDR_ENCODE causes the type to be encoded into the
	75	* stream. XDR_DECODE causes the type to be extracted from the stream.
	76	* XDR_FREE can be used to release the space allocated by an XDR_DECODE
	77	* request.
	78	*/
	79	enum xdr_op {
	80	XDR_ENCODE=0,
	81	XDR_DECODE=1,
	82	XDR_FREE=2
	83	};
	84
	85	/*
	86	* This is the number of bytes per unit of external data.
	87	*/
	88	#define BYTES_PER_XDR_UNIT (4)
	89	#define RNDUP(x) ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \
	90	* BYTES_PER_XDR_UNIT)
	91
	92	/*
	93	* A xdrproc_t exists for each data type which is to be encoded or decoded.
	94	*
	95	* The second argument to the xdrproc_t is a pointer to an opaque pointer.
	96	* The opaque pointer generally points to a structure of the data type
	97	* to be decoded. If this pointer is 0, then the type routines should
	98	* allocate dynamic storage of the appropriate size and return it.
	99	* bool_t (xdrproc_t)(XDR , caddr_t *);
	100	*/
	101	typedef bool_t (*xdrproc_t)();
	102
	103	/*
	104	* The XDR handle.
	105	* Contains operation which is being applied to the stream,
	106	* an operations vector for the paticular implementation (e.g. see xdr_mem.c),
107	* and two private fields for the use of the particular impelementation.
108	*/
109	typedef struct {
110	enum xdr_op x_op; /* operation; fast additional param */
111	struct xdr_ops {
112	bool_t (x_getlong)(); / get a long from underlying stream */
113	bool_t (x_putlong)(); / put a long to " */
114	bool_t (x_getbytes)();/ get some bytes from " */
115	bool_t (x_putbytes)();/ put some bytes to " */
116	u_int (x_getpostn)();/ returns bytes off from beginning */
117	bool_t (x_setpostn)();/ lets you reposition the stream */
118	long * (x_inline)(); / buf quick ptr to buffered data */
119	void (x_destroy)(); / free privates of this xdr_stream */
120	} *x_ops;
121	caddr_t x_public; /* users' data */
122	caddr_t x_private; /* pointer to private data */
123	caddr_t x_base; /* private used for position info */
124	int x_handy; /* extra private word */
125	} XDR;
126
127	/*
128	* Operations defined on a XDR handle
129	*
130	* XDR *xdrs;
131	* long *longp;
132	* caddr_t addr;
133	* u_int len;
134	* u_int pos;
135	*/
136	#define XDR_GETLONG(xdrs, longp) \
137	(*(xdrs)->x_ops->x_getlong)(xdrs, longp)
138	#define xdr_getlong(xdrs, longp) \
139	(*(xdrs)->x_ops->x_getlong)(xdrs, longp)
140
141	#define XDR_PUTLONG(xdrs, longp) \
142	(*(xdrs)->x_ops->x_putlong)(xdrs, longp)
143	#define xdr_putlong(xdrs, longp) \
144	(*(xdrs)->x_ops->x_putlong)(xdrs, longp)
145
146	#define XDR_GETBYTES(xdrs, addr, len) \
147	(*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)
148	#define xdr_getbytes(xdrs, addr, len) \
149	(*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)
150
151	#define XDR_PUTBYTES(xdrs, addr, len) \
152	(*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)
153	#define xdr_putbytes(xdrs, addr, len) \
154	(*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)
155
156	#define XDR_GETPOS(xdrs) \
157	(*(xdrs)->x_ops->x_getpostn)(xdrs)
158	#define xdr_getpos(xdrs) \
159	(*(xdrs)->x_ops->x_getpostn)(xdrs)
160
161	#define XDR_SETPOS(xdrs, pos) \
162	(*(xdrs)->x_ops->x_setpostn)(xdrs, pos)
163	#define xdr_setpos(xdrs, pos) \
164	(*(xdrs)->x_ops->x_setpostn)(xdrs, pos)
165
166	#define XDR_INLINE(xdrs, len) \
167	(*(xdrs)->x_ops->x_inline)(xdrs, len)
168	#define xdr_inline(xdrs, len) \
169	(*(xdrs)->x_ops->x_inline)(xdrs, len)
170
171	#define XDR_DESTROY(xdrs) \
172	if ((xdrs)->x_ops->x_destroy) \
173	(*(xdrs)->x_ops->x_destroy)(xdrs)
174	#define xdr_destroy(xdrs) \
175	if ((xdrs)->x_ops->x_destroy) \
176	(*(xdrs)->x_ops->x_destroy)(xdrs)
177
178	/*
179	* Support struct for discriminated unions.
180	* You create an array of xdrdiscrim structures, terminated with
181	* a entry with a null procedure pointer. The xdr_union routine gets
182	* the discriminant value and then searches the array of structures
183	* for a matching value. If a match is found the associated xdr routine
184	* is called to handle that part of the union. If there is
185	* no match, then a default routine may be called.
186	* If there is no match and no default routine it is an error.
187	*/
188	#define NULL_xdrproc_t ((xdrproc_t)0)
189	struct xdr_discrim {
190	int value;
191	xdrproc_t proc;
192	};
193
194	/*
195	* In-line routines for fast encode/decode of primitve data types.
196	* Caveat emptor: these use single memory cycles to get the
197	* data from the underlying buffer, and will fail to operate
198	* properly if the data is not aligned. The standard way to use these
199	* is to say:
200	* if ((buf = XDR_INLINE(xdrs, count)) == NULL)
201	* return (FALSE);
202	* <<< macro calls >>>
203	* where ``count'' is the number of bytes of data occupied
204	* by the primitive data types.
205	*
206	* N.B. and frozen for all time: each data type here uses 4 bytes
207	* of external representation.
208	*/
209	#define IXDR_GET_LONG(buf) ((long)ntohl((u_long)*(buf)++))
210	#define IXDR_PUT_LONG(buf, v) (*(buf)++ = (long)htonl((u_long)v))
211
212	#define IXDR_GET_BOOL(buf) ((bool_t)IXDR_GET_LONG(buf))
213	#define IXDR_GET_ENUM(buf, t) ((t)IXDR_GET_LONG(buf))
214	#define IXDR_GET_U_LONG(buf) ((u_long)IXDR_GET_LONG(buf))
215	#define IXDR_GET_SHORT(buf) ((short)IXDR_GET_LONG(buf))
216	#define IXDR_GET_U_SHORT(buf) ((u_short)IXDR_GET_LONG(buf))
217
218	#define IXDR_PUT_BOOL(buf, v) IXDR_PUT_LONG((buf), ((long)(v)))
219	#define IXDR_PUT_ENUM(buf, v) IXDR_PUT_LONG((buf), ((long)(v)))
220	#define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_LONG((buf), ((long)(v)))
221	#define IXDR_PUT_SHORT(buf, v) IXDR_PUT_LONG((buf), ((long)(v)))
222	#define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_LONG((buf), ((long)(v)))
223
224	/*
225	* These are the "generic" xdr routines.
226	*/
d2bc008e C	227	__BEGIN_DECLS
	228	extern bool_t xdr_void __P((void));
	229	extern bool_t xdr_int __P((XDR , int ));
	230	extern bool_t xdr_u_int __P((XDR , u_int ));
	231	extern bool_t xdr_long __P((XDR , long ));
	232	extern bool_t xdr_u_long __P((XDR , u_long ));
	233	extern bool_t xdr_short __P((XDR , short ));
	234	extern bool_t xdr_u_short __P((XDR , u_short ));
	235	extern bool_t xdr_bool __P((XDR , bool_t ));
	236	extern bool_t xdr_enum __P((XDR , enum_t ));
	237	extern bool_t xdr_array __P((XDR , char , u_int , u_int, u_int, xdrproc_t));
	238	extern bool_t xdr_bytes __P((XDR , char , u_int , u_int));
	239	extern bool_t xdr_opaque __P((XDR *, caddr_t, u_int));
	240	extern bool_t xdr_string __P((XDR , char *, u_int));
	241	extern bool_t xdr_union __P((XDR , enum_t , char , struct xdr_discrim , xdrproc_t));
	242	extern bool_t xdr_char __P((XDR , char ));
	243	extern bool_t xdr_u_char __P((XDR , char ));
	244	extern bool_t xdr_vector __P((XDR , char , u_int, u_int, xdrproc_t));
	245	extern bool_t xdr_float __P((XDR , float ));
	246	extern bool_t xdr_double __P((XDR , double ));
	247	extern bool_t xdr_reference __P((XDR , caddr_t , u_int, xdrproc_t));
	248	extern bool_t xdr_pointer __P((XDR , caddr_t , u_int, xdrproc_t));
	249	extern bool_t xdr_wrapstring __P((XDR , char *));
	250	extern void xdr_free __P((xdrproc_t, char *));
	251	__END_DECLS
15637ed4 RG	252
	253	/*
	254	* Common opaque bytes objects used by many rpc protocols;
	255	* declared here due to commonality.
	256	*/
	257	#define MAX_NETOBJ_SZ 1024
	258	struct netobj {
	259	u_int n_len;
	260	char *n_bytes;
	261	};
	262	typedef struct netobj netobj;
	263	extern bool_t xdr_netobj();
	264
	265	/*
	266	* These are the public routines for the various implementations of
	267	* xdr streams.
	268	*/
d2bc008e C	269	__BEGIN_DECLS
	270	/* XDR using memory buffers */
	271	extern void xdrmem_create __P((XDR , char , u_int, enum xdr_op));
	272
	273	#ifdef _STDIO_H_
	274	/* XDR using stdio library */
	275	extern void xdrstdio_create __P((XDR , FILE , enum xdr_op));
	276	#endif
	277
	278	/* XDR pseudo records for tcp */
	279	extern void xdrrec_create __P((XDR , u_int, u_int, char , int ()(), int ()()));
	280
	281	/* make end of xdr record */
	282	extern bool_t xdrrec_endofrecord __P((XDR *, int));
	283
	284	/* move to beginning of next record */
	285	extern bool_t xdrrec_skiprecord __P((XDR *));
	286
	287	/* true if no more input */
	288	extern bool_t xdrrec_eof __P((XDR *));
	289	__END_DECLS
15637ed4	290
d2bc008e	291	#endif /* !_RPC_XDR_H */