summaryrefslogtreecommitdiff
path: root/libstore
diff options
context:
space:
mode:
authorMiles Bader <miles@gnu.org>1996-09-14 17:35:47 +0000
committerMiles Bader <miles@gnu.org>1996-09-14 17:35:47 +0000
commit05a37796695856a886ef7c359b5ca5fe4b7d5e6d (patch)
tree60024f600a43d36b588c0bf62ea61e958b182b7b /libstore
parent0bda777b9103804b9c092646a48fa3fa60b5c412 (diff)
File replaced by zero.c
Diffstat (limited to 'libstore')
-rw-r--r--libstore/null.c109
1 files changed, 0 insertions, 109 deletions
diff --git a/libstore/null.c b/libstore/null.c
deleted file mode 100644
index dd30ded1..00000000
--- a/libstore/null.c
+++ /dev/null
@@ -1,109 +0,0 @@
-/* Null store backend
-
- Copyright (C) 1995, 1996 Free Software Foundation, Inc.
-
- Written by Miles Bader <miles@gnu.ai.mit.edu>
-
- This file is part of the GNU Hurd.
-
- The GNU Hurd is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2, or (at
- your option) any later version.
-
- The GNU Hurd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "store.h"
-
-static error_t
-null_read (struct store *store,
- off_t addr, size_t index, mach_msg_type_number_t amount,
- char **buf, mach_msg_type_number_t *len)
-{
- if (*len < amount)
- {
- error_t err =
- vm_allocate (mach_task_self (), (vm_address_t *)buf, amount, 1);
- if (! err)
- *len = amount;
- return err;
- }
- else
- {
- bzero (*buf, amount);
- *len = amount;
- return 0;
- }
-}
-
-static error_t
-null_write (struct store *store,
- off_t addr, size_t index, char *buf, mach_msg_type_number_t len,
- mach_msg_type_number_t *amount)
-{
- return 0;
-}
-
-error_t
-null_allocate_encoding (const struct store *store, struct store_enc *enc)
-{
- enc->num_ints += 2;
- enc->num_offsets += 1;
- return 0;
-}
-
-error_t
-null_encode (const struct store *store, struct store_enc *enc)
-{
- enc->ints[enc->cur_int++] = store->class->id;
- enc->ints[enc->cur_int++] = store->flags;
- enc->offsets[enc->cur_offset++] = store->size;
- return 0;
-}
-
-error_t
-null_decode (struct store_enc *enc, struct store_class *classes,
- struct store **store)
-{
- off_t size;
- int type, flags;
-
- if (enc->cur_int + 2 > enc->num_ints
- || enc->cur_offset + 1 > enc->num_offsets)
- return EINVAL;
-
- type = enc->ints[enc->cur_int++];
- flags = enc->ints[enc->cur_int++];
- size = enc->offsets[enc->cur_offset++];
-
- return store_null_create (size, flags, store);
-}
-
-static struct store_class
-null_class =
-{
- STORAGE_NULL, "null", null_read, null_write,
- null_allocate_encoding, null_encode, null_decode
-};
-_STORE_STD_CLASS (null_class);
-
-/* Return a new null store SIZE bytes long in STORE. */
-error_t
-store_null_create (size_t size, int flags, struct store **store)
-{
- struct store_run run = { 0, size };
- *store = _make_store (&null_class, MACH_PORT_NULL, flags, 1, &run, 1, 0);
- return *store ? 0 : ENOMEM;
-}