mirror of
https://github.com/autc04/Retro68.git
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207 lines
5.8 KiB
C
207 lines
5.8 KiB
C
/*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* xdr_stdio.c, XDR implementation on standard i/o file.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*
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* This set of routines implements a XDR on a stdio stream.
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* XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
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* from the stream.
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*/
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#include <stdio.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include "xdr_private.h"
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#ifndef ntohl
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# define ntohl(x) xdr_ntohl(x)
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#endif
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#ifndef htonl
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# define htonl(x) xdr_htonl(x)
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#endif
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static void xdrstdio_destroy (XDR *);
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static bool_t xdrstdio_getlong (XDR *, long *);
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static bool_t xdrstdio_putlong (XDR *, const long *);
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static bool_t xdrstdio_getbytes (XDR *, char *, u_int);
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static bool_t xdrstdio_putbytes (XDR *, const char *, u_int);
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static u_int xdrstdio_getpos (XDR *);
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static bool_t xdrstdio_setpos (XDR *, u_int);
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static int32_t * xdrstdio_inline (XDR *, u_int);
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static bool_t xdrstdio_getint32 (XDR*, int32_t *);
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static bool_t xdrstdio_putint32 (XDR*, const int32_t *);
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/*
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* Ops vector for stdio type XDR
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*/
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static const struct xdr_ops xdrstdio_ops = {
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xdrstdio_getlong, /* deseraialize a long int */
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xdrstdio_putlong, /* seraialize a long int */
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xdrstdio_getbytes, /* deserialize counted bytes */
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xdrstdio_putbytes, /* serialize counted bytes */
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xdrstdio_getpos, /* get offset in the stream */
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xdrstdio_setpos, /* set offset in the stream */
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xdrstdio_inline, /* prime stream for inline macros */
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xdrstdio_destroy, /* destroy stream */
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xdrstdio_getint32, /* deseraialize an int */
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xdrstdio_putint32 /* seraialize an long int */
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};
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/*
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* Initialize a stdio xdr stream.
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* Sets the xdr stream handle xdrs for use on the stream file.
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* Operation flag is set to op.
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*/
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void
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xdrstdio_create (XDR * xdrs,
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FILE * file,
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enum xdr_op op)
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{
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xdrs->x_op = op;
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xdrs->x_ops = (struct xdr_ops *) &xdrstdio_ops;
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xdrs->x_private = (void *) file;
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xdrs->x_handy = 0;
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xdrs->x_base = 0;
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}
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/*
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* Destroy a stdio xdr stream.
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* Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
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*/
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static void
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xdrstdio_destroy (XDR * xdrs)
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{
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(void) fflush ((FILE *) xdrs->x_private);
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/* XXX: should we close the file ?? */
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}
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static bool_t
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xdrstdio_getlong (XDR * xdrs,
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long *lp)
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{
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u_int32_t temp;
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if (fread (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1)
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return FALSE;
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*lp = (long) (int32_t) ntohl (temp);
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return TRUE;
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}
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static bool_t
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xdrstdio_putlong (XDR * xdrs,
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const long *lp)
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{
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u_int32_t temp = htonl ((u_int32_t) * lp);
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if (fwrite (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1)
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return FALSE;
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return TRUE;
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}
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static bool_t
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xdrstdio_getbytes (XDR * xdrs,
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char *addr,
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u_int len)
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{
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if ((len != 0) && (fread (addr, (size_t) len, 1,
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(FILE *) xdrs->x_private) != 1))
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return FALSE;
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return TRUE;
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}
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static bool_t
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xdrstdio_putbytes (XDR * xdrs,
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const char *addr,
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u_int len)
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{
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if ((len != 0) && (fwrite (addr, (size_t) len, 1,
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(FILE *) xdrs->x_private) != 1))
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return FALSE;
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return TRUE;
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}
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static u_int
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xdrstdio_getpos (XDR * xdrs)
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{
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return ((u_int) ftell ((FILE *) xdrs->x_private));
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}
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static bool_t
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xdrstdio_setpos (XDR * xdrs,
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u_int pos)
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{
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return ((fseek ((FILE *) xdrs->x_private, (long) pos, 0) < 0) ?
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FALSE : TRUE);
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}
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/* ARGSUSED */
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static int32_t *
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xdrstdio_inline (XDR * xdrs,
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u_int len)
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{
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/*
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* Must do some work to implement this: must insure
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* enough data in the underlying stdio buffer,
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* that the buffer is aligned so that we can indirect through a
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* long *, and stuff this pointer in xdrs->x_buf. Doing
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* a fread or fwrite to a scratch buffer would defeat
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* most of the gains to be had here and require storage
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* management on this buffer, so we don't do this.
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*/
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return NULL;
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}
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static bool_t
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xdrstdio_getint32 (XDR *xdrs,
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int32_t *ip)
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{
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int32_t temp;
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if (fread (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1)
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return FALSE;
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*ip = ntohl (temp);
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return TRUE;
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}
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static bool_t
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xdrstdio_putint32 (XDR *xdrs,
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const int32_t *ip)
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{
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int32_t temp = htonl (*ip);
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if (fwrite (&temp, sizeof (int32_t), 1, (FILE *) xdrs->x_private) != 1)
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return FALSE;
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return TRUE;
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}
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