xdr.h
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上传日期:2008-05-12
资源大小:23136k
文件大小:15k
源码类别:
VxWorks
开发平台:
C/C++
- /* xdr.h, External Data Representation Serialization Routines. */
- /* Copyright 1984 - 1999 Wind River Systems, Inc. */
- #include "copyright_wrs.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
- */
- /* @(#)xdr.h 1.1 86/02/03 SMI */
- /*
- * xdr.h, External Data Representation Serialization Routines.
- *
- * Copyright (C) 1984, Sun Microsystems, Inc.
- */
- /*
- modification history
- --------------------
- 01q,27jul99,elg Add XDR_PUTWORDS and XDR_PUTLONGS.
- 01p,01mar99,spm added a C++ compatible XDR structure (SPR #24837)
- 01o,29jan96,mem replaced test of CPU_FAMILY with test of _BYTE_ORDER
- 01n,09jun93,hdn added support for I80X86
- 01n,17oct94,ism fixed prototype of xdr_u_char() (SPR#2675)
- 01m,22sep92,rrr added support for c++
- 01l,07sep92,smb added include of rpctypes.h
- 01k,26may92,rrr the tree shuffle
- 01j,26may92,ajm fixed #define of IXDR_GET_LONG for all compilers (see 01g)
- updated copyright
- 01i,04oct91,rrr passed through the ansification filter
- -fixed broken prototype
- -fixed #else and #endif
- -changed copyright notice
- 01h,18sep91,wmd use defined(HOST_MIPS) || defined(HOST_DEC) instead of
- CPU=R3000 for the conditional.
- 01g,05aug91,ajm changed #define of IXDR_GET_LONG to be K+R compliant
- for mips compiler (++ can't be applied to an expresion)
- 01f,05aug91,del IXDR_GET_LONG is ixdr_get_long function for I960
- problem w/htonl macro expansion.
- 01e,24oct90,shl commented out redundant function declarations.
- 01d,05oct90,shl added ANSI function prototypes.
- added copyright notice.
- 01c,19apr90,hjb modified IXDR_GET_LONG, IXDR_PUT_LONG, IXDR_PUT_BOOL,
- IXDR_PUT_ENUM, IXDR_PUT_U_LONG, IXDR_PUT_SHORT,
- IXDR_PUT_U_SHORT.
- 01b,26oct89,hjb upgraded to release 4.0
- */
- #ifndef __INCxdrh
- #define __INCxdrh
- #ifdef __cplusplus
- extern "C" {
- #endif
- #include "rpctypes.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) /* 4.0 */
- /*
- * 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.
- */
- #ifdef __cplusplus
- typedef struct {
- enum xdr_op x_op; /* operation; fast additional param */
- struct xdr_ops {
- /* get a long from underlying stream */
- bool_t (*x_getlong)(...);
- /* put a long to underlying stream */
- bool_t (*x_putlong) (...);
- /* get some bytes from underlying stream */
- bool_t (*x_getbytes) (...);
- /* put some bytes to underlying stream */
- bool_t (*x_putbytes) (...);
- /* put some words to underlying stream */
- bool_t (*x_putwords) (...);
- /* put some longs to underlying stream */
- bool_t (*x_putlongs) (...);
- /* returns bytes from beginning of stream*/
- u_int (*x_getpostn) (...);
- /* reposition the stream */
- bool_t (*x_setpostn) (...);
- /* buf quick ptr to buffered data */
- long * (*x_inline) (...);
- /* free private elements of this stream */
- void (*x_destroy) (...);
- } *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;
- #else
- 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 " */
- bool_t (*x_putwords)();/* put some words to " */
- bool_t (*x_putlongs)();/* put some longs 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;
- #endif /* __cplusplus */
- /*
- * 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_PUTWORDS(xdrs, addr, len)
- (*(xdrs)->x_ops->x_putwords)(xdrs, addr, len)
- #define xdr_putwords(xdrs, addr, len)
- (*(xdrs)->x_ops->x_putwords)(xdrs, addr, len)
- #define XDR_PUTLONGS(xdrs, addr, len)
- (*(xdrs)->x_ops->x_putlongs)(xdrs, addr, len)
- #define xdr_putlongs(xdrs, addr, len)
- (*(xdrs)->x_ops->x_putlongs)(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.
- */
- #ifndef _BYTE_ORDER
- #error _BYTE_ORDER must be defined.
- #endif
- #ifndef _BIG_ENDIAN
- #error _BIG_ENDIAN must be defined.
- #endif
- #if (_BYTE_ORDER == _BIG_ENDIAN)
- #define IXDR_GET_LONG(buf) ntohl((u_long) *(buf)++)
- #else
- #define IXDR_GET_LONG(buf) ixdr_get_long (&buf)
- #endif /* (_BYTE_ORDER == _BIG_ENDIAN) */
- #define IXDR_PUT_LONG(buf, v) (*buf++ = 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), (v))
- #define IXDR_PUT_ENUM(buf, v) IXDR_PUT_LONG((buf), (v))
- #define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_LONG((buf), (v))
- #define IXDR_PUT_SHORT(buf, v) IXDR_PUT_LONG((buf), (v))
- #define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_LONG((buf), (v))
- /*
- * 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;
- /*
- * These are the public routines for the various implementations of
- * xdr streams.
- */
- /* extern void xdrmem_create(); */ /* XDR using memory buffers */
- /* extern void xdrstdio_create(); */ /* XDR using stdio library */
- /* extern void xdrrec_create(); */ /* XDR pseudo records for tcp */
- /* extern bool_t xdrrec_endofrecord(); */ /* make end of xdr record */
- /* extern bool_t xdrrec_skiprecord(); */ /* move to begining of next record */
- /* extern bool_t xdrrec_eof(); */ /* true iff no more input */
- /* function declarations */
- #if defined(__STDC__) || defined(__cplusplus)
- extern void xdr_free (xdrproc_t proc, char *objp);
- extern bool_t xdr_void (void);
- extern bool_t xdr_int (XDR *xdrs, int *ip);
- extern bool_t xdr_u_int (XDR *xdrs, u_int *up);
- extern bool_t xdr_long (XDR *xdrs, long *lp);
- extern bool_t xdr_u_long (XDR *xdrs, u_long *ulp);
- extern bool_t xdr_short (XDR *xdrs, short *sp);
- extern bool_t xdr_u_short (XDR *xdrs, u_short *usp);
- extern bool_t xdr_char (XDR *xdrs, char *cp);
- extern bool_t xdr_u_char (XDR *xdrs, u_char *ucp);
- extern bool_t xdr_bool (XDR *xdrs, bool_t *bp);
- extern bool_t xdr_enum (XDR *xdrs, enum_t *ep);
- extern bool_t xdr_opaque (XDR *xdrs, caddr_t cp, u_int cnt);
- extern bool_t xdr_bytes (XDR *xdrs, char **cpp, u_int *sizep,
- u_int maxsize);
- extern bool_t xdr_netobj (XDR *xdrs, struct netobj *np);
- extern bool_t xdr_union (XDR *xdrs, enum_t *dscmp, caddr_t unp,
- struct xdr_discrim *choices, xdrproc_t dfault);
- extern bool_t xdr_string (XDR *xdrs, char **cpp, u_int maxsize);
- extern bool_t xdr_wrapstring (XDR *xdrs, char **cpp);
- extern bool_t xdr_array (XDR *xdrs, caddr_t *addrp, u_int *sizep,
- u_int maxsize, u_int elsize, xdrproc_t elproc);
- extern bool_t xdr_vector (XDR *xdrs, char *basep, u_int nelem,
- u_int elemsize, xdrproc_t xdr_elem);
- extern bool_t xdr_float (XDR *xdrs, float *fp);
- extern bool_t xdr_double (XDR *xdrs, double *dp);
- extern void xdrmem_create (XDR *xdrs, caddr_t addr, u_int size,
- enum xdr_op op);
- extern void xdrrec_create (XDR *xdrs, u_int sendsize, u_int recvsize,
- caddr_t tcp_handle, int (*readit)(), int (*writeit)());
- extern bool_t xdrrec_skiprecord (XDR *xdrs);
- extern bool_t xdrrec_eof (XDR *xdrs);
- extern bool_t xdrrec_endofrecord (XDR *xdrs, bool_t sendnow);
- extern bool_t xdr_reference (XDR *xdrs, caddr_t *pp, u_int size,
- xdrproc_t proc);
- extern bool_t xdr_pointer (XDR *xdrs, char **objpp, u_int obj_size,
- xdrproc_t xdr_obj);
- #else
- extern void xdr_free ();
- extern bool_t xdr_void ();
- extern bool_t xdr_int ();
- extern bool_t xdr_u_int ();
- extern bool_t xdr_long ();
- extern bool_t xdr_u_long ();
- extern bool_t xdr_short ();
- extern bool_t xdr_u_short ();
- extern bool_t xdr_char ();
- extern bool_t xdr_u_char ();
- extern bool_t xdr_bool ();
- extern bool_t xdr_enum ();
- extern bool_t xdr_opaque ();
- extern bool_t xdr_bytes ();
- extern bool_t xdr_netobj ();
- extern bool_t xdr_union ();
- extern bool_t xdr_string ();
- extern bool_t xdr_wrapstring ();
- extern bool_t xdr_array ();
- extern bool_t xdr_vector ();
- extern bool_t xdr_float ();
- extern bool_t xdr_double ();
- extern void xdrmem_create ();
- extern void xdrrec_create ();
- extern bool_t xdrrec_skiprecord ();
- extern bool_t xdrrec_eof ();
- extern bool_t xdrrec_endofrecord ();
- extern bool_t xdr_reference ();
- extern bool_t xdr_pointer ();
- #endif /* __STDC__ */
- #ifdef __cplusplus
- }
- #endif
- #endif /* __INCxdrh */