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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /sunrpc/xdr_mem.c
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initial import
Diffstat (limited to 'sunrpc/xdr_mem.c')
-rw-r--r--sunrpc/xdr_mem.c184
1 files changed, 184 insertions, 0 deletions
diff --git a/sunrpc/xdr_mem.c b/sunrpc/xdr_mem.c
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+++ b/sunrpc/xdr_mem.c
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+/* @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC */
+/*
+ * 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
+ */
+#if !defined(lint) && defined(SCCSIDS)
+static char sccsid[] = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";
+#endif
+
+/*
+ * xdr_mem.h, XDR implementation using memory buffers.
+ *
+ * Copyright (C) 1984, Sun Microsystems, Inc.
+ *
+ * If you have some data to be interpreted as external data representation
+ * or to be converted to external data representation in a memory buffer,
+ * then this is the package for you.
+ *
+ */
+
+
+#include <rpc/types.h>
+#include <rpc/xdr.h>
+#include <netinet/in.h>
+
+static bool_t xdrmem_getlong();
+static bool_t xdrmem_putlong();
+static bool_t xdrmem_getbytes();
+static bool_t xdrmem_putbytes();
+static u_int xdrmem_getpos();
+static bool_t xdrmem_setpos();
+static long * xdrmem_inline();
+static void xdrmem_destroy();
+
+static struct xdr_ops xdrmem_ops = {
+ xdrmem_getlong,
+ xdrmem_putlong,
+ xdrmem_getbytes,
+ xdrmem_putbytes,
+ xdrmem_getpos,
+ xdrmem_setpos,
+ xdrmem_inline,
+ xdrmem_destroy
+};
+
+/*
+ * The procedure xdrmem_create initializes a stream descriptor for a
+ * memory buffer.
+ */
+void
+xdrmem_create(xdrs, addr, size, op)
+ register XDR *xdrs;
+ caddr_t addr;
+ u_int size;
+ enum xdr_op op;
+{
+
+ xdrs->x_op = op;
+ xdrs->x_ops = &xdrmem_ops;
+ xdrs->x_private = xdrs->x_base = addr;
+ xdrs->x_handy = size;
+}
+
+static void
+xdrmem_destroy(/*xdrs*/)
+ /*XDR *xdrs;*/
+{
+}
+
+static bool_t
+xdrmem_getlong(xdrs, lp)
+ register XDR *xdrs;
+ long *lp;
+{
+
+ if ((xdrs->x_handy -= sizeof(long)) < 0)
+ return (FALSE);
+ *lp = (long)ntohl((u_long)(*((long *)(xdrs->x_private))));
+ xdrs->x_private += sizeof(long);
+ return (TRUE);
+}
+
+static bool_t
+xdrmem_putlong(xdrs, lp)
+ register XDR *xdrs;
+ long *lp;
+{
+
+ if ((xdrs->x_handy -= sizeof(long)) < 0)
+ return (FALSE);
+ *(long *)xdrs->x_private = (long)htonl((u_long)(*lp));
+ xdrs->x_private += sizeof(long);
+ return (TRUE);
+}
+
+static bool_t
+xdrmem_getbytes(xdrs, addr, len)
+ register XDR *xdrs;
+ caddr_t addr;
+ register u_int len;
+{
+
+ if ((xdrs->x_handy -= len) < 0)
+ return (FALSE);
+ bcopy(xdrs->x_private, addr, len);
+ xdrs->x_private += len;
+ return (TRUE);
+}
+
+static bool_t
+xdrmem_putbytes(xdrs, addr, len)
+ register XDR *xdrs;
+ caddr_t addr;
+ register u_int len;
+{
+
+ if ((xdrs->x_handy -= len) < 0)
+ return (FALSE);
+ bcopy(addr, xdrs->x_private, len);
+ xdrs->x_private += len;
+ return (TRUE);
+}
+
+static u_int
+xdrmem_getpos(xdrs)
+ register XDR *xdrs;
+{
+
+ return ((u_int)xdrs->x_private - (u_int)xdrs->x_base);
+}
+
+static bool_t
+xdrmem_setpos(xdrs, pos)
+ register XDR *xdrs;
+ u_int pos;
+{
+ register caddr_t newaddr = xdrs->x_base + pos;
+ register caddr_t lastaddr = xdrs->x_private + xdrs->x_handy;
+
+ if ((long)newaddr > (long)lastaddr)
+ return (FALSE);
+ xdrs->x_private = newaddr;
+ xdrs->x_handy = (int)lastaddr - (int)newaddr;
+ return (TRUE);
+}
+
+static long *
+xdrmem_inline(xdrs, len)
+ register XDR *xdrs;
+ int len;
+{
+ long *buf = 0;
+
+ if (xdrs->x_handy >= len) {
+ xdrs->x_handy -= len;
+ buf = (long *) xdrs->x_private;
+ xdrs->x_private += len;
+ }
+ return (buf);
+}