[df49c60] | 1 | /* |
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| 2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
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| 3 | * unrestricted use provided that this legend is included on all tape |
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| 4 | * media and as a part of the software program in whole or part. Users |
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| 5 | * may copy or modify Sun RPC without charge, but are not authorized |
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| 6 | * to license or distribute it to anyone else except as part of a product or |
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| 7 | * program developed by the user. |
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| 8 | * |
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| 9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
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| 10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
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| 11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
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| 12 | * |
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| 13 | * Sun RPC is provided with no support and without any obligation on the |
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| 14 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
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| 15 | * modification or enhancement. |
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| 16 | * |
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| 17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
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| 18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
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| 19 | * OR ANY PART THEREOF. |
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| 20 | * |
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| 21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
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| 22 | * or profits or other special, indirect and consequential damages, even if |
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| 23 | * Sun has been advised of the possibility of such damages. |
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| 24 | * |
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| 25 | * Sun Microsystems, Inc. |
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| 26 | * 2550 Garcia Avenue |
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| 27 | * Mountain View, California 94043 |
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| 28 | */ |
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| 29 | |
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| 30 | #if defined(LIBC_SCCS) && !defined(lint) |
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| 31 | /*static char *sccsid = "from: @(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";*/ |
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| 32 | /*static char *sccsid = "from: @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC";*/ |
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| 33 | static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr_mem.c,v 1.8 1999/08/28 00:02:56 peter Exp $"; |
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| 34 | #endif |
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| 35 | |
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| 36 | /* |
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| 37 | * xdr_mem.h, XDR implementation using memory buffers. |
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| 38 | * |
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| 39 | * Copyright (C) 1984, Sun Microsystems, Inc. |
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| 40 | * |
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| 41 | * If you have some data to be interpreted as external data representation |
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| 42 | * or to be converted to external data representation in a memory buffer, |
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| 43 | * then this is the package for you. |
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| 44 | * |
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| 45 | */ |
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| 46 | |
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[37da47a] | 47 | #ifdef HAVE_CONFIG_H |
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| 48 | #include "config.h" |
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| 49 | #endif |
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| 50 | |
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[df49c60] | 51 | #include <string.h> |
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| 52 | #include <rpc/types.h> |
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| 53 | #include <rpc/xdr.h> |
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| 54 | #include <netinet/in.h> |
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| 55 | |
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[cd791626] | 56 | static bool_t xdrmem_getlong_aligned(XDR *xdrs, long *lp); |
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| 57 | static bool_t xdrmem_putlong_aligned(XDR *xdrs, const long *lp); |
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| 58 | static bool_t xdrmem_getlong_unaligned(XDR *xdrs, long *lp); |
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| 59 | static bool_t xdrmem_putlong_unaligned(XDR *xdrs, const long *lp); |
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| 60 | static bool_t xdrmem_getbytes(XDR *xdrs, caddr_t addr, u_int len); |
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| 61 | static bool_t xdrmem_putbytes(XDR *xdrs, const char *addr, u_int len); |
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| 62 | static u_int xdrmem_getpos(XDR *xdrs); /* XXX w/64-bit pointers, u_int not enough! */ |
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| 63 | static bool_t xdrmem_setpos(XDR *xdrs, u_int pos); |
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| 64 | static int32_t *xdrmem_inline_aligned(XDR *xdrs, u_int len); |
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| 65 | static int32_t *xdrmem_inline_unaligned(XDR *xdrs, u_int len); |
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| 66 | static void xdrmem_destroy(XDR *); |
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[df49c60] | 67 | |
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| 68 | static struct xdr_ops xdrmem_ops_aligned = { |
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| 69 | xdrmem_getlong_aligned, |
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| 70 | xdrmem_putlong_aligned, |
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| 71 | xdrmem_getbytes, |
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| 72 | xdrmem_putbytes, |
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| 73 | xdrmem_getpos, |
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| 74 | xdrmem_setpos, |
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| 75 | xdrmem_inline_aligned, |
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| 76 | xdrmem_destroy |
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| 77 | }; |
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| 78 | |
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| 79 | static struct xdr_ops xdrmem_ops_unaligned = { |
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| 80 | xdrmem_getlong_unaligned, |
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| 81 | xdrmem_putlong_unaligned, |
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| 82 | xdrmem_getbytes, |
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| 83 | xdrmem_putbytes, |
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| 84 | xdrmem_getpos, |
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| 85 | xdrmem_setpos, |
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| 86 | xdrmem_inline_unaligned, |
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| 87 | xdrmem_destroy |
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| 88 | }; |
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| 89 | |
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| 90 | /* |
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| 91 | * The procedure xdrmem_create initializes a stream descriptor for a |
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| 92 | * memory buffer. |
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| 93 | */ |
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| 94 | void |
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[95b5e81] | 95 | xdrmem_create( |
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| 96 | XDR *xdrs, |
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| 97 | caddr_t addr, |
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| 98 | u_int size, |
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| 99 | enum xdr_op op) |
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[df49c60] | 100 | { |
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| 101 | |
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| 102 | xdrs->x_op = op; |
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| 103 | xdrs->x_ops = ((size_t)addr & (sizeof(int32_t) - 1)) |
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| 104 | ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned; |
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| 105 | xdrs->x_private = xdrs->x_base = addr; |
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| 106 | xdrs->x_handy = size; |
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| 107 | } |
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| 108 | |
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| 109 | static void |
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[cd791626] | 110 | xdrmem_destroy(XDR *xdrs) |
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[df49c60] | 111 | { |
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| 112 | |
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| 113 | } |
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| 114 | |
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| 115 | static bool_t |
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[95b5e81] | 116 | xdrmem_getlong_aligned( |
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| 117 | XDR *xdrs, |
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| 118 | long *lp) |
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[df49c60] | 119 | { |
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| 120 | |
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| 121 | if ((xdrs->x_handy -= sizeof(int32_t)) < 0) |
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| 122 | return (FALSE); |
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| 123 | *lp = ntohl(*(int32_t *)(xdrs->x_private)); |
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| 124 | xdrs->x_private += sizeof(int32_t); |
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| 125 | return (TRUE); |
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| 126 | } |
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| 127 | |
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| 128 | static bool_t |
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[95b5e81] | 129 | xdrmem_putlong_aligned( |
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| 130 | XDR *xdrs, |
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[cd791626] | 131 | const long *lp) |
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[df49c60] | 132 | { |
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| 133 | |
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| 134 | if ((xdrs->x_handy -= sizeof(int32_t)) < 0) |
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| 135 | return (FALSE); |
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| 136 | *(int32_t *)xdrs->x_private = htonl(*lp); |
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| 137 | xdrs->x_private += sizeof(int32_t); |
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| 138 | return (TRUE); |
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| 139 | } |
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| 140 | |
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| 141 | static bool_t |
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[95b5e81] | 142 | xdrmem_getlong_unaligned( |
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| 143 | XDR *xdrs, |
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| 144 | long *lp) |
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[df49c60] | 145 | { |
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| 146 | int32_t l; |
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| 147 | |
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| 148 | if ((xdrs->x_handy -= sizeof(int32_t)) < 0) |
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| 149 | return (FALSE); |
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| 150 | memcpy(&l, xdrs->x_private, sizeof(int32_t)); |
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| 151 | *lp = ntohl(l); |
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| 152 | xdrs->x_private += sizeof(int32_t); |
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| 153 | return (TRUE); |
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| 154 | } |
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| 155 | |
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| 156 | static bool_t |
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[95b5e81] | 157 | xdrmem_putlong_unaligned( |
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| 158 | XDR *xdrs, |
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[cd791626] | 159 | const long *lp) |
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[df49c60] | 160 | { |
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| 161 | int32_t l; |
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| 162 | |
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| 163 | if ((xdrs->x_handy -= sizeof(int32_t)) < 0) |
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| 164 | return (FALSE); |
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| 165 | l = htonl(*lp); |
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| 166 | memcpy(xdrs->x_private, &l, sizeof(int32_t)); |
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| 167 | xdrs->x_private += sizeof(int32_t); |
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| 168 | return (TRUE); |
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| 169 | } |
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| 170 | |
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| 171 | static bool_t |
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[95b5e81] | 172 | xdrmem_getbytes( |
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| 173 | XDR *xdrs, |
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| 174 | caddr_t addr, |
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| 175 | u_int len) |
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[df49c60] | 176 | { |
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| 177 | |
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| 178 | if ((xdrs->x_handy -= len) < 0) |
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| 179 | return (FALSE); |
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| 180 | memcpy(addr, xdrs->x_private, len); |
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| 181 | xdrs->x_private += len; |
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| 182 | return (TRUE); |
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| 183 | } |
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| 184 | |
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| 185 | static bool_t |
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[95b5e81] | 186 | xdrmem_putbytes( |
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| 187 | XDR *xdrs, |
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[cd791626] | 188 | const char *addr, |
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[95b5e81] | 189 | u_int len) |
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[df49c60] | 190 | { |
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| 191 | |
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| 192 | if ((xdrs->x_handy -= len) < 0) |
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| 193 | return (FALSE); |
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| 194 | memcpy(xdrs->x_private, addr, len); |
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| 195 | xdrs->x_private += len; |
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| 196 | return (TRUE); |
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| 197 | } |
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| 198 | |
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| 199 | static u_int |
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[95b5e81] | 200 | xdrmem_getpos( |
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| 201 | XDR *xdrs) |
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[df49c60] | 202 | { |
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| 203 | |
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| 204 | /* XXX w/64-bit pointers, u_int not enough! */ |
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| 205 | return ((u_long)xdrs->x_private - (u_long)xdrs->x_base); |
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| 206 | } |
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| 207 | |
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| 208 | static bool_t |
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[95b5e81] | 209 | xdrmem_setpos( |
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| 210 | XDR *xdrs, |
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| 211 | u_int pos) |
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[df49c60] | 212 | { |
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| 213 | register caddr_t newaddr = xdrs->x_base + pos; |
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| 214 | register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy; |
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| 215 | |
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| 216 | if ((long)newaddr > (long)lastaddr) |
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| 217 | return (FALSE); |
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| 218 | xdrs->x_private = newaddr; |
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| 219 | xdrs->x_handy = (long)lastaddr - (long)newaddr; |
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| 220 | return (TRUE); |
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| 221 | } |
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| 222 | |
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| 223 | static int32_t * |
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[95b5e81] | 224 | xdrmem_inline_aligned( |
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| 225 | XDR *xdrs, |
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[cd791626] | 226 | u_int len) |
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[df49c60] | 227 | { |
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| 228 | int32_t *buf = 0; |
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| 229 | |
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| 230 | if (xdrs->x_handy >= len) { |
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| 231 | xdrs->x_handy -= len; |
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| 232 | buf = (int32_t *) xdrs->x_private; |
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| 233 | xdrs->x_private += len; |
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| 234 | } |
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| 235 | return (buf); |
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| 236 | } |
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| 237 | |
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| 238 | static int32_t * |
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[95b5e81] | 239 | xdrmem_inline_unaligned( |
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| 240 | XDR *xdrs, |
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[cd791626] | 241 | u_int len) |
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[df49c60] | 242 | { |
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| 243 | |
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| 244 | return (0); |
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| 245 | } |
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