[BACK]Return to xdr_sizeof.c CVS log [TXT][DIR] Up to [cvs.NetBSD.org] / src / lib / libc / rpc

File: [cvs.NetBSD.org] / src / lib / libc / rpc / xdr_sizeof.c (download)

Revision 1.5, Mon Mar 11 20:19:30 2013 UTC (11 years ago) by tron
Branch: MAIN
CVS Tags: yamt-pagecache-base9, tls-maxphys-base, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, phil-wifi-base, phil-wifi-20200421, phil-wifi-20200411, phil-wifi-20200406, phil-wifi-20191119, phil-wifi-20190609, phil-wifi, pgoyette-localcount-base, pgoyette-localcount-20170426, pgoyette-localcount-20170320, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount, pgoyette-compat-merge-20190127, pgoyette-compat-base, pgoyette-compat-20190127, pgoyette-compat-20190118, pgoyette-compat-1226, pgoyette-compat-1126, pgoyette-compat-1020, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315, pgoyette-compat, perseant-stdc-iso10646-base, perseant-stdc-iso10646, netbsd-9-base, netbsd-9-3-RELEASE, netbsd-9-2-RELEASE, netbsd-9-1-RELEASE, netbsd-9-0-RELEASE, netbsd-9-0-RC2, netbsd-9-0-RC1, netbsd-9, netbsd-8-base, netbsd-8-2-RELEASE, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, netbsd-7-nhusb-base-20170116, netbsd-7-nhusb-base, netbsd-7-nhusb, netbsd-7-base, netbsd-7-2-RELEASE, netbsd-7-1-RELEASE, netbsd-7-1-RC2, netbsd-7-1-RC1, netbsd-7-1-2-RELEASE, netbsd-7-1-1-RELEASE, netbsd-7-1, netbsd-7-0-RELEASE, netbsd-7-0-RC3, netbsd-7-0-RC2, netbsd-7-0-RC1, netbsd-7-0-2-RELEASE, netbsd-7-0-1-RELEASE, netbsd-7-0, netbsd-7, netbsd-10-base, netbsd-10-0-RC6, netbsd-10-0-RC5, netbsd-10-0-RC4, netbsd-10-0-RC3, netbsd-10-0-RC2, netbsd-10-0-RC1, netbsd-10, matt-nb8-mediatek-base, matt-nb8-mediatek, localcount-20160914, is-mlppp-base, is-mlppp, cjep_sun2x-base1, cjep_sun2x-base, cjep_sun2x, cjep_staticlib_x-base1, cjep_staticlib_x-base, cjep_staticlib_x, bouyer-socketcan-base1, bouyer-socketcan-base, bouyer-socketcan, agc-symver-base, agc-symver, HEAD
Changes since 1.4: +29 -27 lines

Replace previous Sun Microsystems, Inc. license with a standard
BSD 3-clause license granted by Oracle America, Inc..
This license change was approved by Wim Coekaerts, Senior Vice President,
Linux and Virtualization at Oracle Corporation.

This fixes PR lib/45293 by Pedro Giffuni.

/*
 * Copyright (c) 2010, Oracle America, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *     * Neither the name of the "Oracle America, Inc." nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/*
 * xdr_sizeof.c
 *
 * Copyright 1990 Sun Microsystems, Inc.
 *
 * General purpose routine to see how much space something will use
 * when serialized using XDR.
 */

#include <sys/cdefs.h>
#if 0
__FBSDID("$FreeBSD: src/lib/libc/xdr/xdr_sizeof.c,v 1.5.38.1 2010/12/21 17:10:29 kensmith Exp $");
#else
__RCSID("$NetBSD: xdr_sizeof.c,v 1.5 2013/03/11 20:19:30 tron Exp $");
#endif

#include "namespace.h"
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <sys/types.h>
#include <stdlib.h>

#ifdef __weak_alias
__weak_alias(xdr_sizeof,_xdr_sizeof)
#endif 

static bool_t x_putlong(XDR *, const long *);
static bool_t x_putbytes(XDR *, const char *, u_int);
static u_int x_getpostn(XDR *);
static bool_t x_setpostn(XDR *, u_int);
static int32_t *x_inline(XDR *, u_int);
static int harmless(void);
static void x_destroy(XDR *);

/* ARGSUSED */
static bool_t
x_putlong(XDR *xdrs, const long *longp)
{
	xdrs->x_handy += BYTES_PER_XDR_UNIT;
	return (TRUE);
}

/* ARGSUSED */
static bool_t
x_putbytes(XDR *xdrs, const char *bp, u_int len)
{
	xdrs->x_handy += len;
	return (TRUE);
}

static u_int
x_getpostn(XDR *xdrs)
{
	return (xdrs->x_handy);
}

/* ARGSUSED */
static bool_t
x_setpostn(XDR *xdrs, u_int pos)
{
	/* This is not allowed */
	return (FALSE);
}

static int32_t *
x_inline(XDR *xdrs, u_int len)
{
	if (len == 0) {
		return (NULL);
	}
	if (xdrs->x_op != XDR_ENCODE) {
		return (NULL);
	}
	if (len < (u_int)(uintptr_t)xdrs->x_base) {
		/* x_private was already allocated */
		xdrs->x_handy += len;
		return ((int32_t *) xdrs->x_private);
	} else {
		/* Free the earlier space and allocate new area */
		if (xdrs->x_private)
			free(xdrs->x_private);
		if ((xdrs->x_private = malloc(len)) == NULL) {
			xdrs->x_base = 0;
			return (NULL);
		}
		xdrs->x_base = (caddr_t)(uintptr_t)len;
		xdrs->x_handy += len;
		return ((int32_t *) xdrs->x_private);
	}
}

static int
harmless(void)
{
	/* Always return FALSE/NULL, as the case may be */
	return (0);
}

static void
x_destroy(XDR *xdrs)
{
	xdrs->x_handy = 0;
	xdrs->x_base = 0;
	if (xdrs->x_private) {
		free(xdrs->x_private);
		xdrs->x_private = NULL;
	}
	return;
}

unsigned long
xdr_sizeof(xdrproc_t func, void *data)
{
	XDR x;
	struct xdr_ops ops;
	bool_t stat;
	/* to stop ANSI-C compiler from complaining */
	typedef  bool_t (* dummyfunc1)(XDR *, long *);
	typedef  bool_t (* dummyfunc2)(XDR *, caddr_t, u_int);

	ops.x_putlong = x_putlong;
	ops.x_putbytes = x_putbytes;
	ops.x_inline = x_inline;
	ops.x_getpostn = x_getpostn;
	ops.x_setpostn = x_setpostn;
	ops.x_destroy = x_destroy;

	/* the other harmless ones */
	ops.x_getlong =  (dummyfunc1) harmless;
	ops.x_getbytes = (dummyfunc2) harmless;

	x.x_op = XDR_ENCODE;
	x.x_ops = &ops;
	x.x_handy = 0;
	x.x_private = (caddr_t) NULL;
	x.x_base = (caddr_t) 0;

	stat = func(&x, data);
	if (x.x_private)
		free(x.x_private);
	return (stat == TRUE ? (unsigned) x.x_handy: 0);
}