[444] | 1 | |
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| 2 | /* |
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| 3 | * Copyright (c) 2009, Sun Microsystems, Inc. |
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| 4 | * All rights reserved. |
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| 5 | * |
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| 6 | * Redistribution and use in source and binary forms, with or without |
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| 7 | * modification, are permitted provided that the following conditions are met: |
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| 8 | * - Redistributions of source code must retain the above copyright notice, |
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| 9 | * this list of conditions and the following disclaimer. |
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| 10 | * - Redistributions in binary form must reproduce the above copyright notice, |
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| 11 | * this list of conditions and the following disclaimer in the documentation |
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| 12 | * and/or other materials provided with the distribution. |
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| 13 | * - Neither the name of Sun Microsystems, Inc. nor the names of its |
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| 14 | * contributors may be used to endorse or promote products derived |
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| 15 | * from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 18 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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| 21 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 22 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 23 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 24 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 25 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 26 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 27 | * POSSIBILITY OF SUCH DAMAGE. |
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| 28 | * |
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| 29 | * from: @(#)xdr.h 1.19 87/04/22 SMI |
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| 30 | * from: @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC |
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| 31 | * $FreeBSD: src/include/rpc/xdr.h,v 1.23 2003/03/07 13:19:40 nectar Exp $ |
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| 32 | * $NetBSD: xdr.h,v 1.19 2000/07/17 05:00:45 matt Exp $ |
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| 33 | */ |
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| 34 | |
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| 35 | /* |
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| 36 | * xdr.h, External Data Representation Serialization Routines. |
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| 37 | * |
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| 38 | * Copyright (C) 1984, Sun Microsystems, Inc. |
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| 39 | */ |
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| 40 | |
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| 41 | #ifndef _RPC_XDR_H |
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| 42 | #define _RPC_XDR_H |
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| 43 | #include <_ansi.h> |
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| 44 | #include <rpc/types.h> |
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| 45 | |
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| 46 | #ifdef __cplusplus |
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| 47 | extern "C" { |
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| 48 | #endif |
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| 49 | |
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| 50 | /* |
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| 51 | * XDR provides a conventional way for converting between C data |
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| 52 | * types and an external bit-string representation. Library supplied |
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| 53 | * routines provide for the conversion on built-in C data types. These |
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| 54 | * routines and utility routines defined here are used to help implement |
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| 55 | * a type encode/decode routine for each user-defined type. |
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| 56 | * |
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| 57 | * Each data type provides a single procedure which takes two arguments: |
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| 58 | * |
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| 59 | * bool_t |
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| 60 | * xdrproc(XDR *xdrs, <type> *argresp) |
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| 61 | * |
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| 62 | * xdrs is an instance of a XDR handle, to which or from which the data |
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| 63 | * type is to be converted. argresp is a pointer to the structure to be |
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| 64 | * converted. The XDR handle contains an operation field which indicates |
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| 65 | * which of the operations (ENCODE, DECODE * or FREE) is to be performed. |
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| 66 | * |
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| 67 | * XDR_DECODE may allocate space if the pointer argresp is null. This |
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| 68 | * data can be freed with the XDR_FREE operation. |
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| 69 | * |
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| 70 | * We write only one procedure per data type to make it easy |
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| 71 | * to keep the encode and decode procedures for a data type consistent. |
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| 72 | * In many cases the same code performs all operations on a user defined type, |
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| 73 | * because all the hard work is done in the component type routines. |
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| 74 | * decode as a series of calls on the nested data types. |
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| 75 | */ |
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| 76 | |
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| 77 | /* |
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| 78 | * Xdr operations. XDR_ENCODE causes the type to be encoded into the |
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| 79 | * stream. XDR_DECODE causes the type to be extracted from the stream. |
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| 80 | * XDR_FREE can be used to release the space allocated by an XDR_DECODE |
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| 81 | * request. |
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| 82 | */ |
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| 83 | enum xdr_op |
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| 84 | { |
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| 85 | XDR_ENCODE = 0, |
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| 86 | XDR_DECODE = 1, |
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| 87 | XDR_FREE = 2 |
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| 88 | }; |
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| 89 | |
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| 90 | /* |
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| 91 | * This is the number of bytes per unit of external data. |
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| 92 | */ |
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| 93 | #define BYTES_PER_XDR_UNIT (4) |
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| 94 | #if 1 |
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| 95 | /* faster version when BYTES_PER_XDR_UNIT is a power of two */ |
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| 96 | # define RNDUP(x) (((x) + BYTES_PER_XDR_UNIT - 1) & ~(BYTES_PER_XDR_UNIT - 1)) |
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| 97 | #else /* old version */ |
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| 98 | #define RNDUP(x) ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \ |
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| 99 | * BYTES_PER_XDR_UNIT) |
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| 100 | #endif |
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| 101 | |
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| 102 | /* |
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| 103 | * The XDR handle. |
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| 104 | * Contains operation which is being applied to the stream, |
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| 105 | * an operations vector for the particular implementation (e.g. see xdr_mem.c), |
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| 106 | * and two private fields for the use of the particular implementation. |
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| 107 | */ |
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| 108 | typedef struct __rpc_xdr |
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| 109 | { |
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| 110 | enum xdr_op x_op; /* operation; fast additional param */ |
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| 111 | const struct xdr_ops |
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| 112 | { |
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| 113 | /* get a long from underlying stream */ |
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| 114 | bool_t (*x_getlong) (struct __rpc_xdr *, long *); |
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| 115 | |
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| 116 | /* put a long to " */ |
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| 117 | bool_t (*x_putlong) (struct __rpc_xdr *, const long *); |
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| 118 | |
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| 119 | /* get some bytes from " */ |
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| 120 | bool_t (*x_getbytes) (struct __rpc_xdr *, char *, u_int); |
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| 121 | |
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| 122 | /* put some bytes to " */ |
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| 123 | bool_t (*x_putbytes) (struct __rpc_xdr *, const char *, u_int); |
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| 124 | |
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| 125 | /* returns bytes off from beginning */ |
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| 126 | u_int (*x_getpostn) (struct __rpc_xdr *); |
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| 127 | |
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| 128 | /* lets you reposition the stream */ |
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| 129 | bool_t (*x_setpostn) (struct __rpc_xdr *, u_int); |
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| 130 | |
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| 131 | /* buf quick ptr to buffered data */ |
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| 132 | int32_t * (*x_inline) (struct __rpc_xdr *, u_int); |
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| 133 | |
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| 134 | /* free privates of this xdr_stream */ |
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| 135 | void (*x_destroy) (struct __rpc_xdr *); |
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| 136 | |
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| 137 | /* get an int32 from this xdr_stream */ |
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| 138 | bool_t (*x_getint32) (struct __rpc_xdr *, int32_t *); |
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| 139 | |
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| 140 | /* put an int32 to the underlying stream */ |
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| 141 | bool_t (*x_putint32) (struct __rpc_xdr *, const int32_t *); |
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| 142 | |
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| 143 | } *x_ops; |
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| 144 | char *x_public; /* users' data */ |
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| 145 | void *x_private; /* pointer to private data */ |
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| 146 | char *x_base; /* private used for position info */ |
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| 147 | u_int x_handy; /* extra private word */ |
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| 148 | } XDR; |
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| 149 | |
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| 150 | /* |
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| 151 | * A xdrproc_t exists for each data type which is to be encoded or decoded. |
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| 152 | * |
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| 153 | * The second argument to the xdrproc_t is a pointer to an opaque pointer. |
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| 154 | * The opaque pointer generally points to a structure of the data type |
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| 155 | * to be decoded. If this pointer is 0, then the type routines should |
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| 156 | * allocate dynamic storage of the appropriate size and return it. |
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| 157 | * bool_t (*xdrproc_t)(XDR *, some_type *) |
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| 158 | */ |
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| 159 | typedef bool_t (*xdrproc_t) (XDR *, ...); |
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| 160 | |
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| 161 | /* |
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| 162 | * Operations defined on a XDR handle |
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| 163 | * |
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| 164 | * XDR *xdrs; |
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| 165 | * long *longp; |
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| 166 | * char *addr; |
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| 167 | * u_int len; |
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| 168 | * u_int pos; |
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| 169 | */ |
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| 170 | #define XDR_GETINT32(xdrs, int32p) \ |
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| 171 | (*(xdrs)->x_ops->x_getint32)(xdrs, int32p) |
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| 172 | #define xdr_getint32(xdrs, int32p) \ |
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| 173 | (*(xdrs)->x_ops->x_getint32)(xdrs, int32p) |
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| 174 | |
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| 175 | #define XDR_PUTINT32(xdrs, int32p) \ |
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| 176 | (*(xdrs)->x_ops->x_putint32)(xdrs, int32p) |
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| 177 | #define xdr_putint32(xdrs, int32p) \ |
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| 178 | (*(xdrs)->x_ops->x_putint32)(xdrs, int32p) |
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| 179 | |
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| 180 | #define XDR_GETLONG(xdrs, longp) \ |
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| 181 | (*(xdrs)->x_ops->x_getlong)(xdrs, longp) |
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| 182 | #define xdr_getlong(xdrs, longp) \ |
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| 183 | (*(xdrs)->x_ops->x_getlong)(xdrs, longp) |
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| 184 | |
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| 185 | #define XDR_PUTLONG(xdrs, longp) \ |
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| 186 | (*(xdrs)->x_ops->x_putlong)(xdrs, longp) |
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| 187 | #define xdr_putlong(xdrs, longp) \ |
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| 188 | (*(xdrs)->x_ops->x_putlong)(xdrs, longp) |
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| 189 | |
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| 190 | #define XDR_GETBYTES(xdrs, addr, len) \ |
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| 191 | (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len) |
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| 192 | #define xdr_getbytes(xdrs, addr, len) \ |
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| 193 | (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len) |
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| 194 | |
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| 195 | #define XDR_PUTBYTES(xdrs, addr, len) \ |
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| 196 | (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len) |
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| 197 | #define xdr_putbytes(xdrs, addr, len) \ |
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| 198 | (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len) |
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| 199 | |
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| 200 | #define XDR_GETPOS(xdrs) \ |
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| 201 | (*(xdrs)->x_ops->x_getpostn)(xdrs) |
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| 202 | #define xdr_getpos(xdrs) \ |
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| 203 | (*(xdrs)->x_ops->x_getpostn)(xdrs) |
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| 204 | |
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| 205 | #define XDR_SETPOS(xdrs, pos) \ |
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| 206 | (*(xdrs)->x_ops->x_setpostn)(xdrs, pos) |
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| 207 | #define xdr_setpos(xdrs, pos) \ |
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| 208 | (*(xdrs)->x_ops->x_setpostn)(xdrs, pos) |
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| 209 | |
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| 210 | #define XDR_INLINE(xdrs, len) \ |
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| 211 | (*(xdrs)->x_ops->x_inline)(xdrs, len) |
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| 212 | #define xdr_inline(xdrs, len) \ |
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| 213 | (*(xdrs)->x_ops->x_inline)(xdrs, len) |
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| 214 | |
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| 215 | #define XDR_DESTROY(xdrs) \ |
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| 216 | do { \ |
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| 217 | if ((xdrs)->x_ops->x_destroy) \ |
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| 218 | (*(xdrs)->x_ops->x_destroy)(xdrs); \ |
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| 219 | } while (0) |
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| 220 | #define xdr_destroy(xdrs) \ |
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| 221 | do { \ |
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| 222 | if ((xdrs)->x_ops->x_destroy) \ |
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| 223 | (*(xdrs)->x_ops->x_destroy)(xdrs); \ |
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| 224 | } while (0) |
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| 225 | |
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| 226 | /* |
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| 227 | * Solaris strips the '_t' from these types -- not sure why. |
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| 228 | * But, let's be compatible. |
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| 229 | */ |
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| 230 | #define xdr_rpcvers(xdrs, versp) xdr_u_int32(xdrs, versp) |
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| 231 | #define xdr_rpcprog(xdrs, progp) xdr_u_int32(xdrs, progp) |
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| 232 | #define xdr_rpcproc(xdrs, procp) xdr_u_int32(xdrs, procp) |
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| 233 | #define xdr_rpcprot(xdrs, protp) xdr_u_int32(xdrs, protp) |
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| 234 | #define xdr_rpcport(xdrs, portp) xdr_u_int32(xdrs, portp) |
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| 235 | |
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| 236 | /* |
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| 237 | * Support struct for discriminated unions. |
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| 238 | * You create an array of xdrdiscrim structures, terminated with |
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| 239 | * an entry with a null procedure pointer. The xdr_union routine gets |
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| 240 | * the discriminant value and then searches the array of structures |
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| 241 | * for a matching value. If a match is found the associated xdr routine |
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| 242 | * is called to handle that part of the union. If there is |
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| 243 | * no match, then a default routine may be called. |
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| 244 | * If there is no match and no default routine it is an error. |
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| 245 | */ |
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| 246 | #define NULL_xdrproc_t ((xdrproc_t)0) |
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| 247 | struct xdr_discrim |
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| 248 | { |
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| 249 | int value; |
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| 250 | xdrproc_t proc; |
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| 251 | }; |
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| 252 | |
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| 253 | /* |
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| 254 | * In-line routines for fast encode/decode of primitive data types. |
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| 255 | * Caveat emptor: these use single memory cycles to get the |
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| 256 | * data from the underlying buffer, and will fail to operate |
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| 257 | * properly if the data is not aligned. The standard way to use these |
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| 258 | * is to say: |
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| 259 | * if ((buf = XDR_INLINE(xdrs, count)) == NULL) |
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| 260 | * return (FALSE); |
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| 261 | * <<< macro calls >>> |
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| 262 | * where ``count'' is the number of bytes of data occupied |
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| 263 | * by the primitive data types. |
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| 264 | * |
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| 265 | * N.B. and frozen for all time: each data type here uses 4 bytes |
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| 266 | * of external representation. |
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| 267 | */ |
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| 268 | #define IXDR_GET_INT32(buf) ((int32_t)ntohl((u_int32_t)*(buf)++)) |
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| 269 | #define IXDR_PUT_INT32(buf, v) (*(buf)++ =(int32_t)htonl((u_int32_t)v)) |
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| 270 | #define IXDR_GET_U_INT32(buf) ((uint32_t)IXDR_GET_INT32(buf)) |
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| 271 | #define IXDR_PUT_U_INT32(buf, v) IXDR_PUT_INT32((buf), ((int32_t)(v))) |
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| 272 | |
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| 273 | /* Warning: inline long routines are broken for 64 bit platforms. |
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| 274 | * Because the other inline routines below are implemented in terms |
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| 275 | * of them, they are all also broken for 64 bit platforms. |
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| 276 | */ |
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| 277 | #define IXDR_GET_LONG(buf) ((long)ntohl((u_int32_t)*(buf)++)) |
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| 278 | #define IXDR_PUT_LONG(buf, v) (*(buf)++ =(int32_t)htonl((u_int32_t)v)) |
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| 279 | #define IXDR_GET_U_LONG(buf) ((u_long)IXDR_GET_LONG(buf)) |
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| 280 | #define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_LONG((buf), (v)) |
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| 281 | |
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| 282 | #define IXDR_GET_BOOL(buf) ((bool_t)IXDR_GET_LONG(buf)) |
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| 283 | #define IXDR_GET_ENUM(buf, t) ((t)IXDR_GET_LONG(buf)) |
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| 284 | #define IXDR_GET_SHORT(buf) ((short)IXDR_GET_LONG(buf)) |
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| 285 | #define IXDR_GET_U_SHORT(buf) ((u_short)IXDR_GET_LONG(buf)) |
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| 286 | |
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| 287 | #define IXDR_PUT_BOOL(buf, v) IXDR_PUT_LONG((buf), (v)) |
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| 288 | #define IXDR_PUT_ENUM(buf, v) IXDR_PUT_LONG((buf), (v)) |
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| 289 | #define IXDR_PUT_SHORT(buf, v) IXDR_PUT_LONG((buf), (v)) |
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| 290 | #define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_LONG((buf), (v)) |
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| 291 | |
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| 292 | /* |
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| 293 | * These are the "generic" xdr routines. |
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| 294 | */ |
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| 295 | extern bool_t xdr_void (void); |
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| 296 | extern bool_t xdr_short (XDR *, short *); |
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| 297 | extern bool_t xdr_u_short (XDR *, u_short *); |
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| 298 | extern bool_t xdr_int (XDR *, int *); |
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| 299 | extern bool_t xdr_u_int (XDR *, u_int *); |
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| 300 | extern bool_t xdr_long (XDR *, long *); |
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| 301 | extern bool_t xdr_u_long (XDR *, u_long *); |
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| 302 | extern bool_t xdr_int8_t (XDR *, int8_t *); |
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| 303 | extern bool_t xdr_uint8_t (XDR *, uint8_t *); |
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| 304 | extern bool_t xdr_u_int8_t (XDR *, u_int8_t *); |
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| 305 | extern bool_t xdr_int16_t (XDR *, int16_t *); |
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| 306 | extern bool_t xdr_uint16_t (XDR *, uint16_t *); |
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| 307 | extern bool_t xdr_u_int16_t (XDR *, u_int16_t *); |
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| 308 | extern bool_t xdr_int32_t (XDR *, int32_t *); |
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| 309 | extern bool_t xdr_uint32_t (XDR *, uint32_t *); |
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| 310 | extern bool_t xdr_u_int32_t (XDR *, u_int32_t *); |
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| 311 | #if defined(___int64_t_defined) |
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| 312 | extern bool_t xdr_int64_t (XDR *, int64_t *); |
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| 313 | extern bool_t xdr_uint64_t (XDR *, uint64_t *); |
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| 314 | extern bool_t xdr_u_int64_t (XDR *, u_int64_t *); |
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| 315 | #endif /* ___int64_t_defined */ |
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| 316 | extern bool_t xdr_bool (XDR *, bool_t *); |
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| 317 | extern bool_t xdr_enum (XDR *, enum_t *); |
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| 318 | extern bool_t xdr_array (XDR *, char **, u_int *, u_int, u_int, xdrproc_t); |
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| 319 | extern bool_t xdr_bytes (XDR *, char **, u_int *, u_int); |
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| 320 | extern bool_t xdr_opaque (XDR *, char *, u_int); |
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| 321 | extern bool_t xdr_string (XDR *, char **, u_int); |
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| 322 | extern bool_t xdr_union (XDR *, enum_t *, char *, |
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| 323 | const struct xdr_discrim *, xdrproc_t); |
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| 324 | extern bool_t xdr_char (XDR *, char *); |
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| 325 | extern bool_t xdr_u_char (XDR *, u_char *); |
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| 326 | extern bool_t xdr_vector (XDR *, char *, u_int, u_int, xdrproc_t); |
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| 327 | extern bool_t xdr_float (XDR *, float *); |
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| 328 | extern bool_t xdr_double (XDR *, double *); |
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| 329 | /* extern bool_t xdr_quadruple (XDR *, long double *); */ |
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| 330 | extern bool_t xdr_reference (XDR *, char **, u_int, xdrproc_t); |
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| 331 | extern bool_t xdr_pointer (XDR *, char **, u_int, xdrproc_t); |
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| 332 | extern bool_t xdr_wrapstring (XDR *, char **); |
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| 333 | #if defined(___int64_t_defined) |
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| 334 | extern bool_t xdr_hyper (XDR *, quad_t *); |
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| 335 | extern bool_t xdr_u_hyper (XDR *, u_quad_t *); |
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| 336 | extern bool_t xdr_longlong_t (XDR *, quad_t *); |
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| 337 | extern bool_t xdr_u_longlong_t (XDR *, u_quad_t *); |
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| 338 | #endif /* ___int64_t_defined */ |
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| 339 | extern u_long xdr_sizeof (xdrproc_t, void *); |
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| 340 | |
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| 341 | /* |
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| 342 | * Common opaque bytes objects used by many rpc protocols; |
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| 343 | * declared here due to commonality. |
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| 344 | */ |
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| 345 | #define MAX_NETOBJ_SZ 1024 |
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| 346 | struct netobj |
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| 347 | { |
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| 348 | u_int n_len; |
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| 349 | char *n_bytes; |
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| 350 | }; |
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| 351 | typedef struct netobj netobj; |
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| 352 | extern bool_t xdr_netobj (XDR *, struct netobj *); |
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| 353 | |
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| 354 | /* |
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| 355 | * These are the public routines for the various implementations of |
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| 356 | * xdr streams. |
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| 357 | */ |
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| 358 | |
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| 359 | /* XDR using memory buffers */ |
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| 360 | extern void xdrmem_create (XDR *, char *, u_int, enum xdr_op); |
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| 361 | |
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| 362 | /* XDR using stdio library */ |
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| 363 | #if defined(_STDIO_H_) |
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| 364 | extern void xdrstdio_create (XDR *, FILE *, enum xdr_op); |
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| 365 | #endif |
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| 366 | |
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| 367 | /* XDR pseudo records for tcp */ |
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| 368 | extern void xdrrec_create (XDR *, u_int, u_int, void *, |
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| 369 | int (*) (void *, void *, int), |
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| 370 | int (*) (void *, void *, int)); |
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| 371 | |
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| 372 | /* make end of xdr record */ |
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| 373 | extern bool_t xdrrec_endofrecord (XDR *, bool_t); |
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| 374 | |
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| 375 | /* move to beginning of next record */ |
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| 376 | extern bool_t xdrrec_skiprecord (XDR *); |
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| 377 | |
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| 378 | /* true if no more input */ |
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| 379 | extern bool_t xdrrec_eof (XDR *); |
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| 380 | extern u_int xdrrec_readbytes (XDR *, caddr_t, u_int); |
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| 381 | |
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| 382 | /* free memory buffers for xdr */ |
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| 383 | extern void xdr_free (xdrproc_t, void *); |
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| 384 | |
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| 385 | #ifdef __cplusplus |
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| 386 | } |
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| 387 | #endif |
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| 388 | |
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| 389 | #endif /* !_RPC_XDR_H */ |
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