/* * 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 *//* * 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. * */#define __FORCE_GLIBC#define _GNU_SOURCE#include <features.h>#include <string.h>#include <rpc/rpc.h>static bool_t xdrmem_getlong (XDR *, long *);static bool_t xdrmem_putlong (XDR *, const long *);static bool_t xdrmem_getbytes (XDR *, caddr_t, u_int);static bool_t xdrmem_putbytes (XDR *, const char *, u_int);static u_int xdrmem_getpos (const XDR *);static bool_t xdrmem_setpos (XDR *, u_int);static int32_t *xdrmem_inline (XDR *, int);static void xdrmem_destroy (XDR *);static bool_t xdrmem_getint32 (XDR *, int32_t *);static bool_t xdrmem_putint32 (XDR *, const int32_t *);static const struct xdr_ops xdrmem_ops ={  xdrmem_getlong,  xdrmem_putlong,  xdrmem_getbytes,  xdrmem_putbytes,  xdrmem_getpos,  xdrmem_setpos,  xdrmem_inline,  xdrmem_destroy,  xdrmem_getint32,  xdrmem_putint32};/* * The procedure xdrmem_create initializes a stream descriptor for a * memory buffer. */voidxdrmem_create (XDR *xdrs, const caddr_t addr, u_int size, enum xdr_op op){  xdrs->x_op = op;  /* We have to add the const since the `struct xdr_ops' in `struct XDR'     is not `const'.  */  xdrs->x_ops = (struct xdr_ops *) &xdrmem_ops;  xdrs->x_private = xdrs->x_base = addr;  xdrs->x_handy = size;}/* * Nothing needs to be done for the memory case.  The argument is clearly * const. */static voidxdrmem_destroy (XDR *xdrs){}/* * Gets the next word from the memory referenced by xdrs and places it * in the long pointed to by lp.  It then increments the private word to * point at the next element.  Neither object pointed to is const */static bool_txdrmem_getlong (XDR *xdrs, long *lp){  if ((xdrs->x_handy -= 4) < 0)    return FALSE;  *lp = (int32_t) ntohl ((*((int32_t *) (xdrs->x_private))));  xdrs->x_private += 4;  return TRUE;}/* * Puts the long pointed to by lp in the memory referenced by xdrs.  It * then increments the private word to point at the next element.  The * long pointed at is const */static bool_txdrmem_putlong (XDR *xdrs, const long *lp){  if ((xdrs->x_handy -= 4) < 0)    return FALSE;  *(int32_t *) xdrs->x_private = htonl (*lp);  xdrs->x_private += 4;  return TRUE;}/* * Gets an unaligned number of bytes from the xdrs structure and writes them * to the address passed in addr.  Be very careful when calling this routine * as it could leave the xdrs pointing to an unaligned structure which is not * a good idea.  None of the things pointed to are const. */static bool_txdrmem_getbytes (XDR *xdrs, caddr_t addr, u_int len){  if ((xdrs->x_handy -= len) < 0)    return FALSE;  memcpy (addr, xdrs->x_private, len);  xdrs->x_private += len;  return TRUE;}/* * The complementary function to the above.  The same warnings apply about * unaligned data.  The source address is const. */static bool_txdrmem_putbytes (XDR *xdrs, const char *addr, u_int len){  if ((xdrs->x_handy -= len) < 0)    return FALSE;  memcpy (xdrs->x_private, addr, len);  xdrs->x_private += len;  return TRUE;}/* * Not sure what this one does.  But it clearly doesn't modify the contents * of xdrs.  **FIXME** does this not assume u_int == u_long? */static u_intxdrmem_getpos (const XDR *xdrs){  return (u_long) xdrs->x_private - (u_long) xdrs->x_base;}/* * xdrs modified */static bool_txdrmem_setpos (xdrs, pos)     XDR *xdrs;     u_int pos;{  caddr_t newaddr = xdrs->x_base + pos;  caddr_t lastaddr = xdrs->x_private + xdrs->x_handy;  if ((long) newaddr > (long) lastaddr)    return FALSE;  xdrs->x_private = newaddr;  xdrs->x_handy = (long) lastaddr - (long) newaddr;  return TRUE;}/* * xdrs modified */static int32_t *xdrmem_inline (XDR *xdrs, int len){  int32_t *buf = 0;  if (xdrs->x_handy >= len)    {      xdrs->x_handy -= len;      buf = (int32_t *) xdrs->x_private;      xdrs->x_private += len;    }  return buf;}/* * Gets the next word from the memory referenced by xdrs and places it * in the int pointed to by ip.  It then increments the private word to * point at the next element.  Neither object pointed to is const */static bool_txdrmem_getint32 (XDR *xdrs, int32_t *ip){  if ((xdrs->x_handy -= 4) < 0)    return FALSE;  *ip = ntohl ((*((int32_t *) (xdrs->x_private))));  xdrs->x_private += 4;  return TRUE;}/* * Puts the long pointed to by lp in the memory referenced by xdrs.  It * then increments the private word to point at the next element.  The * long pointed at is const */static bool_txdrmem_putint32 (XDR *xdrs, const int32_t *ip){  if ((xdrs->x_handy -= 4) < 0)    return FALSE;  *(int32_t *) xdrs->x_private = htonl (*ip);  xdrs->x_private += 4;  return TRUE;}