+++ /dev/null
-/* @(#)xdr.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.c 1.35 87/08/12";
-#endif
-
-/*
- * xdr.c, Generic XDR routines implementation.
- *
- * Copyright (C) 1986, Sun Microsystems, Inc.
- *
- * These are the "generic" xdr routines used to serialize and de-serialize
- * most common data items. See xdr.h for more info on the interface to
- * xdr.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <rpc/types.h>
-#include <rpc/xdr.h>
-
-/*
- * constants specific to the xdr "protocol"
- */
-#define XDR_FALSE ((long) 0)
-#define XDR_TRUE ((long) 1)
-#define LASTUNSIGNED ((u_int) 0-1)
-
-/*
- * for unit alignment
- */
-static char xdr_zero[BYTES_PER_XDR_UNIT] = { 0, 0, 0, 0 };
-
-/*
- * Free a data structure using XDR
- * Not a filter, but a convenient utility nonetheless
- */
-void
-xdr_free(proc, objp)
- xdrproc_t proc;
- char *objp;
-{
- XDR x;
-
- x.x_op = XDR_FREE;
- (*proc)(&x, objp);
-}
-
-/*
- * XDR nothing
- */
-bool_t
-xdr_void(/* xdrs, addr */)
- /* XDR *xdrs; */
- /* caddr_t addr; */
-{
-
- return (TRUE);
-}
-
-/*
- * XDR integers
- */
-bool_t
-xdr_int(xdrs, ip)
- XDR *xdrs;
- int *ip;
-{
-#ifdef lint
- (void) (xdr_short(xdrs, (short *)ip));
- return (xdr_long(xdrs, (long *)ip));
-#else
- if (sizeof (int) == sizeof (long)) {
- return (xdr_long(xdrs, (long *)ip));
- } else {
- return (xdr_short(xdrs, (short *)ip));
- }
-#endif
-}
-
-/*
- * XDR unsigned integers
- */
-bool_t
-xdr_u_int(xdrs, up)
- XDR *xdrs;
- u_int *up;
-{
-
-#ifdef lint
- (void) (xdr_short(xdrs, (short *)up));
- return (xdr_u_long(xdrs, (u_long *)up));
-#else
- if (sizeof (u_int) == sizeof (u_long)) {
- return (xdr_u_long(xdrs, (u_long *)up));
- } else {
- return (xdr_short(xdrs, (short *)up));
- }
-#endif
-}
-
-/*
- * XDR long integers
- * same as xdr_u_long - open coded to save a proc call!
- */
-bool_t
-xdr_long(xdrs, lp)
- register XDR *xdrs;
- long *lp;
-{
-
- if (xdrs->x_op == XDR_ENCODE)
- return (XDR_PUTLONG(xdrs, lp));
-
- if (xdrs->x_op == XDR_DECODE)
- return (XDR_GETLONG(xdrs, lp));
-
- if (xdrs->x_op == XDR_FREE)
- return (TRUE);
-
- return (FALSE);
-}
-
-/*
- * XDR unsigned long integers
- * same as xdr_long - open coded to save a proc call!
- */
-bool_t
-xdr_u_long(xdrs, ulp)
- register XDR *xdrs;
- u_long *ulp;
-{
-
- if (xdrs->x_op == XDR_DECODE)
- return (XDR_GETLONG(xdrs, (long *)ulp));
- if (xdrs->x_op == XDR_ENCODE)
- return (XDR_PUTLONG(xdrs, (long *)ulp));
- if (xdrs->x_op == XDR_FREE)
- return (TRUE);
- return (FALSE);
-}
-
-/*
- * XDR short integers
- */
-bool_t
-xdr_short(xdrs, sp)
- register XDR *xdrs;
- short *sp;
-{
- long l;
-
- switch (xdrs->x_op) {
-
- case XDR_ENCODE:
- l = (long) *sp;
- return (XDR_PUTLONG(xdrs, &l));
-
- case XDR_DECODE:
- if (!XDR_GETLONG(xdrs, &l)) {
- return (FALSE);
- }
- *sp = (short) l;
- return (TRUE);
-
- case XDR_FREE:
- return (TRUE);
- }
- return (FALSE);
-}
-
-/*
- * XDR unsigned short integers
- */
-bool_t
-xdr_u_short(xdrs, usp)
- register XDR *xdrs;
- u_short *usp;
-{
- u_long l;
-
- switch (xdrs->x_op) {
-
- case XDR_ENCODE:
- l = (u_long) *usp;
- return (XDR_PUTLONG(xdrs, &l));
-
- case XDR_DECODE:
- if (!XDR_GETLONG(xdrs, &l)) {
- return (FALSE);
- }
- *usp = (u_short) l;
- return (TRUE);
-
- case XDR_FREE:
- return (TRUE);
- }
- return (FALSE);
-}
-
-
-/*
- * XDR a char
- */
-bool_t
-xdr_char(xdrs, cp)
- XDR *xdrs;
- char *cp;
-{
- int i;
-
- i = (*cp);
- if (!xdr_int(xdrs, &i)) {
- return (FALSE);
- }
- *cp = i;
- return (TRUE);
-}
-
-/*
- * XDR an unsigned char
- */
-bool_t
-xdr_u_char(xdrs, cp)
- XDR *xdrs;
- char *cp;
-{
- u_int u;
-
- u = (*cp);
- if (!xdr_u_int(xdrs, &u)) {
- return (FALSE);
- }
- *cp = u;
- return (TRUE);
-}
-
-/*
- * XDR booleans
- */
-bool_t
-xdr_bool(xdrs, bp)
- register XDR *xdrs;
- bool_t *bp;
-{
- long lb;
-
- switch (xdrs->x_op) {
-
- case XDR_ENCODE:
- lb = *bp ? XDR_TRUE : XDR_FALSE;
- return (XDR_PUTLONG(xdrs, &lb));
-
- case XDR_DECODE:
- if (!XDR_GETLONG(xdrs, &lb)) {
- return (FALSE);
- }
- *bp = (lb == XDR_FALSE) ? FALSE : TRUE;
- return (TRUE);
-
- case XDR_FREE:
- return (TRUE);
- }
- return (FALSE);
-}
-
-/*
- * XDR enumerations
- */
-bool_t
-xdr_enum(xdrs, ep)
- XDR *xdrs;
- enum_t *ep;
-{
-#ifndef lint
- enum sizecheck { SIZEVAL }; /* used to find the size of an enum */
-
- /*
- * enums are treated as ints
- */
- if (sizeof (enum sizecheck) == sizeof (long)) {
- return (xdr_long(xdrs, (long *)ep));
- } else if (sizeof (enum sizecheck) == sizeof (short)) {
- return (xdr_short(xdrs, (short *)ep));
- } else {
- return (FALSE);
- }
-#else
- (void) (xdr_short(xdrs, (short *)ep));
- return (xdr_long(xdrs, (long *)ep));
-#endif
-}
-
-/*
- * XDR opaque data
- * Allows the specification of a fixed size sequence of opaque bytes.
- * cp points to the opaque object and cnt gives the byte length.
- */
-bool_t
-xdr_opaque(xdrs, cp, cnt)
- register XDR *xdrs;
- caddr_t cp;
- register u_int cnt;
-{
- register u_int rndup;
- static char crud[BYTES_PER_XDR_UNIT];
-
- /*
- * if no data we are done
- */
- if (cnt == 0)
- return (TRUE);
-
- /*
- * round byte count to full xdr units
- */
- rndup = cnt % BYTES_PER_XDR_UNIT;
- if (rndup > 0)
- rndup = BYTES_PER_XDR_UNIT - rndup;
-
- if (xdrs->x_op == XDR_DECODE) {
- if (!XDR_GETBYTES(xdrs, cp, cnt)) {
- return (FALSE);
- }
- if (rndup == 0)
- return (TRUE);
- return (XDR_GETBYTES(xdrs, crud, rndup));
- }
-
- if (xdrs->x_op == XDR_ENCODE) {
- if (!XDR_PUTBYTES(xdrs, cp, cnt)) {
- return (FALSE);
- }
- if (rndup == 0)
- return (TRUE);
- return (XDR_PUTBYTES(xdrs, xdr_zero, rndup));
- }
-
- if (xdrs->x_op == XDR_FREE) {
- return (TRUE);
- }
-
- return (FALSE);
-}
-
-/*
- * XDR counted bytes
- * *cpp is a pointer to the bytes, *sizep is the count.
- * If *cpp is NULL maxsize bytes are allocated
- */
-bool_t
-xdr_bytes(xdrs, cpp, sizep, maxsize)
- register XDR *xdrs;
- char **cpp;
- register u_int *sizep;
- u_int maxsize;
-{
- register char *sp = *cpp; /* sp is the actual string pointer */
- register u_int nodesize;
-
- /*
- * first deal with the length since xdr bytes are counted
- */
- if (! xdr_u_int(xdrs, sizep)) {
- return (FALSE);
- }
- nodesize = *sizep;
- if ((nodesize > maxsize) && (xdrs->x_op != XDR_FREE)) {
- return (FALSE);
- }
-
- /*
- * now deal with the actual bytes
- */
- switch (xdrs->x_op) {
-
- case XDR_DECODE:
- if (nodesize == 0) {
- return (TRUE);
- }
- if (sp == NULL) {
- *cpp = sp = (char *)mem_alloc(nodesize);
- }
- if (sp == NULL) {
- (void) fprintf(stderr, "xdr_bytes: out of memory\n");
- return (FALSE);
- }
- /* fall into ... */
-
- case XDR_ENCODE:
- return (xdr_opaque(xdrs, sp, nodesize));
-
- case XDR_FREE:
- if (sp != NULL) {
- mem_free(sp, nodesize);
- *cpp = NULL;
- }
- return (TRUE);
- }
- return (FALSE);
-}
-
-/*
- * Implemented here due to commonality of the object.
- */
-bool_t
-xdr_netobj(xdrs, np)
- XDR *xdrs;
- struct netobj *np;
-{
-
- return (xdr_bytes(xdrs, &np->n_bytes, &np->n_len, MAX_NETOBJ_SZ));
-}
-
-/*
- * XDR a descriminated union
- * Support routine for discriminated unions.
- * You create an array of xdrdiscrim structures, terminated with
- * an entry with a null procedure pointer. The routine gets
- * the discriminant value and then searches the array of xdrdiscrims
- * looking for that value. It calls the procedure given in the xdrdiscrim
- * to handle the discriminant. If there is no specific routine a default
- * routine may be called.
- * If there is no specific or default routine an error is returned.
- */
-bool_t
-xdr_union(xdrs, dscmp, unp, choices, dfault)
- register XDR *xdrs;
- enum_t *dscmp; /* enum to decide which arm to work on */
- char *unp; /* the union itself */
- struct xdr_discrim *choices; /* [value, xdr proc] for each arm */
- xdrproc_t dfault; /* default xdr routine */
-{
- register enum_t dscm;
-
- /*
- * we deal with the discriminator; it's an enum
- */
- if (! xdr_enum(xdrs, dscmp)) {
- return (FALSE);
- }
- dscm = *dscmp;
-
- /*
- * search choices for a value that matches the discriminator.
- * if we find one, execute the xdr routine for that value.
- */
- for (; choices->proc != NULL_xdrproc_t; choices++) {
- if (choices->value == dscm)
- return ((*(choices->proc))(xdrs, unp, LASTUNSIGNED));
- }
-
- /*
- * no match - execute the default xdr routine if there is one
- */
- return ((dfault == NULL_xdrproc_t) ? FALSE :
- (*dfault)(xdrs, unp, LASTUNSIGNED));
-}
-
-
-/*
- * Non-portable xdr primitives.
- * Care should be taken when moving these routines to new architectures.
- */
-
-
-/*
- * XDR null terminated ASCII strings
- * xdr_string deals with "C strings" - arrays of bytes that are
- * terminated by a NULL character. The parameter cpp references a
- * pointer to storage; If the pointer is null, then the necessary
- * storage is allocated. The last parameter is the max allowed length
- * of the string as specified by a protocol.
- */
-bool_t
-xdr_string(xdrs, cpp, maxsize)
- register XDR *xdrs;
- char **cpp;
- u_int maxsize;
-{
- register char *sp = *cpp; /* sp is the actual string pointer */
- u_int size;
- u_int nodesize;
-
- /*
- * first deal with the length since xdr strings are counted-strings
- */
- switch (xdrs->x_op) {
- case XDR_DECODE: break; /* keep gcc happy */
- case XDR_FREE:
- if (sp == NULL) {
- return(TRUE); /* already free */
- }
- /* fall through... */
- case XDR_ENCODE:
- size = strlen(sp);
- break;
- }
- if (! xdr_u_int(xdrs, &size)) {
- return (FALSE);
- }
- if (size > maxsize) {
- return (FALSE);
- }
- nodesize = size + 1;
-
- /*
- * now deal with the actual bytes
- */
- switch (xdrs->x_op) {
-
- case XDR_DECODE:
- if (nodesize == 0) {
- return (TRUE);
- }
- if (sp == NULL)
- *cpp = sp = (char *)mem_alloc(nodesize);
- if (sp == NULL) {
- (void) fprintf(stderr, "xdr_string: out of memory\n");
- return (FALSE);
- }
- sp[size] = 0;
- /* fall into ... */
-
- case XDR_ENCODE:
- return (xdr_opaque(xdrs, sp, size));
-
- case XDR_FREE:
- mem_free(sp, nodesize);
- *cpp = NULL;
- return (TRUE);
- }
- return (FALSE);
-}
-
-/*
- * Wrapper for xdr_string that can be called directly from
- * routines like clnt_call
- */
-bool_t
-xdr_wrapstring(xdrs, cpp)
- XDR *xdrs;
- char **cpp;
-{
- if (xdr_string(xdrs, cpp, LASTUNSIGNED)) {
- return (TRUE);
- }
- return (FALSE);
-}
git.annexia.org / portablexdr.git / blobdiff