diff options
Diffstat (limited to 'sunrpc/pmap_prot2.c')
| -rw-r--r-- | sunrpc/pmap_prot2.c | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/sunrpc/pmap_prot2.c b/sunrpc/pmap_prot2.c deleted file mode 100644 index c414db0298..0000000000 --- a/sunrpc/pmap_prot2.c +++ /dev/null @@ -1,112 +0,0 @@ -/* - * pmap_prot2.c - * Protocol for the local binder service, or pmap. - * - * 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. - */ - -#include <rpc/types.h> -#include <rpc/xdr.h> -#include <rpc/pmap_prot.h> -#include <shlib-compat.h> - - -/* - * What is going on with linked lists? (!) - * First recall the link list declaration from pmap_prot.h: - * - * struct pmaplist { - * struct pmap pml_map; - * struct pmaplist *pml_map; - * }; - * - * Compare that declaration with a corresponding xdr declaration that - * is (a) pointer-less, and (b) recursive: - * - * typedef union switch (bool_t) { - * - * case TRUE: struct { - * struct pmap; - * pmaplist_t foo; - * }; - * - * case FALSE: struct {}; - * } pmaplist_t; - * - * Notice that the xdr declaration has no nxt pointer while - * the C declaration has no bool_t variable. The bool_t can be - * interpreted as ``more data follows me''; if FALSE then nothing - * follows this bool_t; if TRUE then the bool_t is followed by - * an actual struct pmap, and then (recursively) by the - * xdr union, pamplist_t. - * - * This could be implemented via the xdr_union primitive, though this - * would cause a one recursive call per element in the list. Rather than do - * that we can ``unwind'' the recursion - * into a while loop and do the union arms in-place. - * - * The head of the list is what the C programmer wishes to past around - * the net, yet is the data that the pointer points to which is interesting; - * this sounds like a job for xdr_reference! - */ -bool_t -xdr_pmaplist (XDR *xdrs, struct pmaplist **rp) -{ - /* - * more_elements is pre-computed in case the direction is - * XDR_ENCODE or XDR_FREE. more_elements is overwritten by - * xdr_bool when the direction is XDR_DECODE. - */ - bool_t more_elements; - int freeing = (xdrs->x_op == XDR_FREE); - struct pmaplist *next = NULL; - - while (TRUE) - { - more_elements = (bool_t) (*rp != NULL); - if (!xdr_bool (xdrs, &more_elements)) - return FALSE; - if (!more_elements) - return TRUE; /* we are done */ - /* - * the unfortunate side effect of non-recursion is that in - * the case of freeing we must remember the next object - * before we free the current object ... - */ - if (freeing) - next = (*rp)->pml_next; - if (!xdr_reference (xdrs, (caddr_t *) rp, - (u_int) sizeof (struct pmaplist), - (xdrproc_t) xdr_pmap)) - return FALSE; - rp = freeing ? &next : &((*rp)->pml_next); - } -} -libc_hidden_nolink_sunrpc (xdr_pmaplist, GLIBC_2_0) |