[4721cf1] | 1 | /* @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC */ |
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| 2 | /* |
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| 3 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
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| 4 | * unrestricted use provided that this legend is included on all tape |
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| 5 | * media and as a part of the software program in whole or part. Users |
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| 6 | * may copy or modify Sun RPC without charge, but are not authorized |
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| 7 | * to license or distribute it to anyone else except as part of a product or |
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| 8 | * program developed by the user. |
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| 9 | * |
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| 10 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
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| 11 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
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| 12 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
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| 13 | * |
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| 14 | * Sun RPC is provided with no support and without any obligation on the |
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| 15 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
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| 16 | * modification or enhancement. |
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| 17 | * |
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| 18 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
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| 19 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
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| 20 | * OR ANY PART THEREOF. |
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| 21 | * |
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| 22 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
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| 23 | * or profits or other special, indirect and consequential damages, even if |
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| 24 | * Sun has been advised of the possibility of such damages. |
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| 25 | * |
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| 26 | * Sun Microsystems, Inc. |
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| 27 | * 2550 Garcia Avenue |
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| 28 | * Mountain View, California 94043 |
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| 29 | */ |
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| 30 | #if !defined(lint) && defined(SCCSIDS) |
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| 31 | static char sccsid[] = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro"; |
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| 32 | #endif |
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| 33 | |
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| 34 | /* |
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| 35 | * xdr_mem.h, XDR implementation using memory buffers. |
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| 36 | * |
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| 37 | * Copyright (C) 1984, Sun Microsystems, Inc. |
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| 38 | * |
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| 39 | * If you have some data to be interpreted as external data representation |
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| 40 | * or to be converted to external data representation in a memory buffer, |
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| 41 | * then this is the package for you. |
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| 42 | * |
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| 43 | */ |
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| 44 | |
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| 45 | |
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| 46 | #include <string.h> /* bcopy */ |
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| 47 | #include <rpc/types.h> |
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| 48 | #include <rpc/xdr.h> |
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| 49 | #include <netinet/in.h> |
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| 50 | |
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| 51 | static bool_t xdrmem_getlong(); |
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| 52 | static bool_t xdrmem_putlong(); |
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| 53 | static bool_t xdrmem_getbytes(); |
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| 54 | static bool_t xdrmem_putbytes(); |
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| 55 | static u_int xdrmem_getpos(); |
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| 56 | static bool_t xdrmem_setpos(); |
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| 57 | static long * xdrmem_inline(); |
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| 58 | static void xdrmem_destroy(); |
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| 59 | |
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| 60 | static struct xdr_ops xdrmem_ops = { |
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| 61 | xdrmem_getlong, |
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| 62 | xdrmem_putlong, |
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| 63 | xdrmem_getbytes, |
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| 64 | xdrmem_putbytes, |
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| 65 | xdrmem_getpos, |
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| 66 | xdrmem_setpos, |
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| 67 | xdrmem_inline, |
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| 68 | xdrmem_destroy |
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| 69 | }; |
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| 70 | |
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| 71 | /* |
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| 72 | * The procedure xdrmem_create initializes a stream descriptor for a |
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| 73 | * memory buffer. |
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| 74 | */ |
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| 75 | void |
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| 76 | xdrmem_create(xdrs, addr, size, op) |
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| 77 | register XDR *xdrs; |
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| 78 | caddr_t addr; |
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| 79 | u_int size; |
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| 80 | enum xdr_op op; |
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| 81 | { |
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| 82 | |
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| 83 | xdrs->x_op = op; |
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| 84 | xdrs->x_ops = &xdrmem_ops; |
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| 85 | xdrs->x_private = xdrs->x_base = addr; |
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| 86 | xdrs->x_handy = size; |
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| 87 | } |
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| 88 | |
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| 89 | static void |
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| 90 | xdrmem_destroy(/*xdrs*/) |
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| 91 | /*XDR *xdrs;*/ |
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| 92 | { |
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| 93 | } |
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| 94 | |
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| 95 | static bool_t |
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| 96 | xdrmem_getlong(xdrs, lp) |
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| 97 | register XDR *xdrs; |
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| 98 | long *lp; |
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| 99 | { |
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| 100 | |
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| 101 | if ((xdrs->x_handy -= sizeof(long)) < 0) |
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| 102 | return (FALSE); |
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| 103 | *lp = (long)ntohl((u_long)(*((long *)(xdrs->x_private)))); |
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| 104 | xdrs->x_private += sizeof(long); |
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| 105 | return (TRUE); |
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| 106 | } |
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| 107 | |
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| 108 | static bool_t |
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| 109 | xdrmem_putlong(xdrs, lp) |
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| 110 | register XDR *xdrs; |
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| 111 | long *lp; |
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| 112 | { |
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| 113 | |
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| 114 | if ((xdrs->x_handy -= sizeof(long)) < 0) |
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| 115 | return (FALSE); |
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| 116 | *(long *)xdrs->x_private = (long)htonl((u_long)(*lp)); |
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| 117 | xdrs->x_private += sizeof(long); |
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| 118 | return (TRUE); |
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| 119 | } |
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| 120 | |
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| 121 | static bool_t |
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| 122 | xdrmem_getbytes(xdrs, addr, len) |
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| 123 | register XDR *xdrs; |
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| 124 | caddr_t addr; |
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| 125 | register u_int len; |
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| 126 | { |
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| 127 | |
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| 128 | if ((xdrs->x_handy -= len) < 0) |
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| 129 | return (FALSE); |
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| 130 | bcopy(xdrs->x_private, addr, len); |
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| 131 | xdrs->x_private += len; |
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| 132 | return (TRUE); |
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| 133 | } |
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| 134 | |
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| 135 | static bool_t |
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| 136 | xdrmem_putbytes(xdrs, addr, len) |
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| 137 | register XDR *xdrs; |
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| 138 | caddr_t addr; |
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| 139 | register u_int len; |
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| 140 | { |
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| 141 | |
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| 142 | if ((xdrs->x_handy -= len) < 0) |
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| 143 | return (FALSE); |
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| 144 | bcopy(addr, xdrs->x_private, len); |
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| 145 | xdrs->x_private += len; |
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| 146 | return (TRUE); |
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| 147 | } |
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| 148 | |
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| 149 | static u_int |
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| 150 | xdrmem_getpos(xdrs) |
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| 151 | register XDR *xdrs; |
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| 152 | { |
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| 153 | |
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| 154 | return ((u_int)xdrs->x_private - (u_int)xdrs->x_base); |
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| 155 | } |
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| 156 | |
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| 157 | static bool_t |
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| 158 | xdrmem_setpos(xdrs, pos) |
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| 159 | register XDR *xdrs; |
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| 160 | u_int pos; |
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| 161 | { |
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| 162 | register caddr_t newaddr = xdrs->x_base + pos; |
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| 163 | register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy; |
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| 164 | |
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| 165 | if ((long)newaddr > (long)lastaddr) |
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| 166 | return (FALSE); |
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| 167 | xdrs->x_private = newaddr; |
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| 168 | xdrs->x_handy = (int)lastaddr - (int)newaddr; |
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| 169 | return (TRUE); |
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| 170 | } |
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| 171 | |
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| 172 | static long * |
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| 173 | xdrmem_inline(xdrs, len) |
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| 174 | register XDR *xdrs; |
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| 175 | int len; |
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| 176 | { |
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| 177 | long *buf = 0; |
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| 178 | |
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| 179 | if (xdrs->x_handy >= len) { |
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| 180 | xdrs->x_handy -= len; |
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| 181 | buf = (long *) xdrs->x_private; |
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| 182 | xdrs->x_private += len; |
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| 183 | } |
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| 184 | return (buf); |
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| 185 | } |
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