Initial revision

1 files changed, 93 insertions, 0 deletions

diff --git a/libstore/stripe.c b/libstore/stripe.c
new file mode 100644
index 00000000..6058e9d8
--- /dev/null
+++ b/libstore/stripe.c
@@ -0,0 +1,93 @@
+/* Interleaved 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 "store.h"
+
+static error_t
+ileave_read (struct store *store,
+	   off_t addr, size_t index, mach_msg_type_number_t amount,
+	   char **buf, mach_msg_type_number_t *len)
+{
+  return io_read (store->port, buf, len, addr * store->block_size, amount);
+}
+
+static error_t
+file_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 io_write (store->port, buf, len, addr * store->block_size, amount);
+}
+
+static struct store_meths
+file_meths = {file_read, file_write};
+
+static error_t
+file_byte_read (struct store *store, off_t addr, mach_msg_type_number_t amount,
+		char **buf, mach_msg_type_number_t *len)
+{
+  return io_read (store->port, buf, len, addr, amount);
+}
+
+static error_t
+file_byte_write (struct store *store,
+		 off_t addr, char *buf, mach_msg_type_number_t len,
+	   mach_msg_type_number_t *amount)
+{
+  return io_write (store->port, buf, len, addr, amount);
+}
+
+static struct store_meths
+file_byte_meths = {file_byte_read, file_byte_write};
+
+/* Return a new store in STORE referring to the mach file FILE.  Consumes
+   the send right FILE.  */
+error_t
+store_file_create (file_t file, struct store **store)
+{
+  off_t runs[2];
+  struct stat stat;
+  error_t err = io_stat (file, &stat);
+
+  if (err)
+    return err;
+
+  runs[0] = 0;
+  runs[1] = stat.st_size;
+
+  return _store_file_create (file, 1, runs, 2, store);
+}
+
+/* Like store_file_create, but doesn't query the file for information.  */
+error_t
+_store_file_create (file_t file, size_t block_size,
+		    off_t *runs, unsigned runs_len,
+		    struct store **store)
+{
+  if (block_size == 1)
+    *store = _make_store (STORAGE_HURD_FILE, &file_byte_meths, file, 1,
+			  runs, runs_len);
+  else
+    *store = _make_store (STORAGE_HURD_FILE, &file_meths, file, block_size,
+			  runs, runs_len);
+  return *store ? 0 : ENOMEM;
+}