Subversion Repositories or1k

/*

 * 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_stdio.c, XDR implementation on standard i/o file.

 *

 * Copyright (C) 1984, Sun Microsystems, Inc.

 *

 * This set of routines implements a XDR on a stdio stream.

 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes

 * from the stream.

 */

#include <rpc/types.h>

#include <stdio.h>

#include <rpc/xdr.h>

#ifdef USE_IN_LIBIO

# include <libio/iolibio.h>

# define fflush(s) _IO_fflush (s)

# define fread(p, m, n, s) _IO_fread (p, m, n, s)

# define ftell(s) _IO_ftell (s)

# define fwrite(p, m, n, s) _IO_fwrite (p, m, n, s)

#endif

static bool_t xdrstdio_getlong (XDR *, long *);

static bool_t xdrstdio_putlong (XDR *, const long *);

static bool_t xdrstdio_getbytes (XDR *, caddr_t, u_int);

static bool_t xdrstdio_putbytes (XDR *, const char *, u_int);

static u_int xdrstdio_getpos (const XDR *);

static bool_t xdrstdio_setpos (XDR *, u_int);

static int32_t *xdrstdio_inline (XDR *, int);

static void xdrstdio_destroy (XDR *);

static bool_t xdrstdio_getint32 (XDR *, int32_t *);

static bool_t xdrstdio_putint32 (XDR *, const int32_t *);

/*

 * Ops vector for stdio type XDR

 */

static const struct xdr_ops xdrstdio_ops =

{

  xdrstdio_getlong,             /* deserialize a long int */

  xdrstdio_putlong,             /* serialize a long int */

  xdrstdio_getbytes,            /* deserialize counted bytes */

  xdrstdio_putbytes,            /* serialize counted bytes */

  xdrstdio_getpos,              /* get offset in the stream */

  xdrstdio_setpos,              /* set offset in the stream */

  xdrstdio_inline,              /* prime stream for inline macros */

  xdrstdio_destroy,             /* destroy stream */

  xdrstdio_getint32,            /* deserialize a int */

  xdrstdio_putint32             /* serialize a int */

};

/*

 * Initialize a stdio xdr stream.

 * Sets the xdr stream handle xdrs for use on the stream file.

 * Operation flag is set to op.

 */

void

xdrstdio_create (XDR *xdrs, FILE *file, 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 *) &xdrstdio_ops;

  xdrs->x_private = (caddr_t) file;

  xdrs->x_handy = 0;

  xdrs->x_base = 0;

}

/*

 * Destroy a stdio xdr stream.

 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.

 */

static void

xdrstdio_destroy (XDR *xdrs)

{

  (void) fflush ((FILE *) xdrs->x_private);

  /* xx should we close the file ?? */

};

static bool_t

xdrstdio_getlong (XDR *xdrs, long *lp)

{

  int32_t mycopy;

  if (fread ((caddr_t) & mycopy, 4, 1, (FILE *) xdrs->x_private) != 1)

    return FALSE;

  *lp = (int32_t) ntohl (mycopy);

  return TRUE;

}

static bool_t

xdrstdio_putlong (XDR *xdrs, const long *lp)

{

  long mycopy = htonl (*lp);

  lp = &mycopy;

  if (fwrite ((caddr_t) lp, 4, 1, (FILE *) xdrs->x_private) != 1)

    return FALSE;

  return TRUE;

}

static bool_t

xdrstdio_getbytes (XDR *xdrs, const caddr_t addr, u_int len)

{

  if ((len != 0) && (fread (addr, (int) len, 1,

                            (FILE *) xdrs->x_private) != 1))

    return FALSE;

  return TRUE;

}

static bool_t

xdrstdio_putbytes (XDR *xdrs, const char *addr, u_int len)

{

  if ((len != 0) && (fwrite (addr, (int) len, 1,

                             (FILE *) xdrs->x_private) != 1))

    return FALSE;

  return TRUE;

}

static u_int

xdrstdio_getpos (const XDR *xdrs)

{

  return (u_int) ftell ((FILE *) xdrs->x_private);

}

static bool_t

xdrstdio_setpos (XDR *xdrs, u_int pos)

{

  return fseek ((FILE *) xdrs->x_private, (long) pos, 0) < 0 ? FALSE : TRUE;

}

static int32_t *

xdrstdio_inline (XDR *xdrs, int len)

{

  /*

   * Must do some work to implement this: must insure

   * enough data in the underlying stdio buffer,

   * that the buffer is aligned so that we can indirect through a

   * long *, and stuff this pointer in xdrs->x_buf.  Doing

   * a fread or fwrite to a scratch buffer would defeat

   * most of the gains to be had here and require storage

   * management on this buffer, so we don't do this.

   */

  return NULL;

}

static bool_t

xdrstdio_getint32 (XDR *xdrs, int32_t *ip)

{

  int32_t mycopy;

  if (fread ((caddr_t) &mycopy, 4, 1, (FILE *) xdrs->x_private) != 1)

    return FALSE;

  *ip = ntohl (mycopy);

  return TRUE;

}

static bool_t

xdrstdio_putint32 (XDR *xdrs, const int32_t *ip)

{

  int32_t mycopy = htonl (*ip);

  ip = &mycopy;

  if (fwrite ((caddr_t) ip, 4, 1, (FILE *) xdrs->x_private) != 1)

    return FALSE;

  return TRUE;

}