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29 #include <afsconfig.h>
30 #include <afs/param.h>
33 * xdr_mem.h, XDR implementation using memory buffers.
35 * Copyright (C) 1984, Sun Microsystems, Inc.
37 * If you have some data to be interpreted as external data representation
38 * or to be converted to external data representation in a memory buffer,
39 * then this is the package for you.
44 # include "afs/sysincludes.h"
49 # include <netinet/in.h>
55 static bool_t xdrmem_getint32(XDR *, afs_int32 *);
56 static bool_t xdrmem_putint32(XDR *, afs_int32 *);
57 static bool_t xdrmem_getbytes(XDR *, caddr_t, u_int);
58 static bool_t xdrmem_putbytes(XDR *, caddr_t, u_int);
59 static u_int xdrmem_getpos(XDR *);
60 static bool_t xdrmem_setpos(XDR *, u_int);
61 static afs_int32 *xdrmem_inline(XDR *, u_int);
62 static void xdrmem_destroy(XDR *);
64 static struct xdr_ops xdrmem_ops = {
65 #ifndef HAVE_STRUCT_LABEL_SUPPORT
66 #ifdef AFS_XDR_64BITOPS
70 /* Windows does not support labeled assigments */
71 #if !(defined(KERNEL) && defined(AFS_SUN57_ENV))
72 xdrmem_getint32, /* deserialize an afs_int32 */
73 xdrmem_putint32, /* serialize an afs_int32 */
75 xdrmem_getbytes, /* deserialize counted bytes */
76 xdrmem_putbytes, /* serialize counted bytes */
77 xdrmem_getpos, /* get offset in the stream: not supported. */
78 xdrmem_setpos, /* set offset in the stream: not supported. */
79 xdrmem_inline, /* prime stream for inline macros */
80 xdrmem_destroy, /* destroy stream */
81 #if (defined(KERNEL) && defined(AFS_SUN57_ENV))
82 NULL, /* control - not implemented */
83 xdrmem_getint32, /* not supported */
84 xdrmem_putint32, /* serialize an afs_int32 */
87 #ifdef AFS_XDR_64BITOPS
91 .x_getint32 = xdrmem_getint32,
92 .x_putint32 = xdrmem_putint32,
93 .x_getbytes = xdrmem_getbytes,
94 .x_putbytes = xdrmem_putbytes,
95 .x_getpostn = xdrmem_getpos,
96 .x_setpostn = xdrmem_setpos,
97 .x_inline = xdrmem_inline,
98 .x_destroy = xdrmem_destroy
103 * The procedure xdrmem_create initializes a stream descriptor for a
107 xdrmem_create(XDR * xdrs, caddr_t addr, u_int size, enum xdr_op op)
110 xdrs->x_ops = &xdrmem_ops;
111 xdrs->x_private = xdrs->x_base = addr;
112 xdrs->x_handy = (size > INT_MAX) ? INT_MAX : size; /* XXX */
116 xdrmem_destroy(XDR *xdrs)
121 xdrmem_getint32(XDR *xdrs, afs_int32 * lp)
123 if (xdrs->x_handy < sizeof(afs_int32))
126 xdrs->x_handy -= sizeof(afs_int32);
127 *lp = ntohl(*((afs_int32 *) (xdrs->x_private)));
128 xdrs->x_private += sizeof(afs_int32);
133 xdrmem_putint32(XDR *xdrs, afs_int32 * lp)
135 if (xdrs->x_handy < sizeof(afs_int32))
138 xdrs->x_handy -= sizeof(afs_int32);
139 *(afs_int32 *) xdrs->x_private = htonl(*lp);
140 xdrs->x_private += sizeof(afs_int32);
145 xdrmem_getbytes(XDR *xdrs, caddr_t addr, u_int len)
147 if (xdrs->x_handy < len)
150 xdrs->x_handy -= len;
151 memcpy(addr, xdrs->x_private, len);
152 xdrs->x_private += len;
157 xdrmem_putbytes(XDR *xdrs, caddr_t addr, u_int len)
159 if (xdrs->x_handy < len)
162 xdrs->x_handy -= len;
163 memcpy(xdrs->x_private, addr, len);
164 xdrs->x_private += len;
169 xdrmem_getpos(XDR *xdrs)
171 return ((u_int)(xdrs->x_private - xdrs->x_base));
175 xdrmem_setpos(XDR *xdrs, u_int pos)
177 caddr_t newaddr = xdrs->x_base + pos;
178 caddr_t lastaddr = xdrs->x_private + xdrs->x_handy;
180 if (newaddr > lastaddr)
182 xdrs->x_private = newaddr;
183 xdrs->x_handy = (int)(lastaddr - newaddr);
188 xdrmem_inline(XDR *xdrs, u_int len)
192 if (len >= 0 && xdrs->x_handy >= len) {
193 xdrs->x_handy -= len;
194 buf = (afs_int32 *) xdrs->x_private;
195 xdrs->x_private += len;