1 files changed, 98 insertions, 0 deletions
diff --git a/libstore/enc.c b/libstore/enc.c
new file mode 100644
index 00000000..d5002a0e
--- /dev/null
+++ b/libstore/enc.c
@@ -0,0 +1,98 @@
+/* Store wire encoding/decoding
+
+   Copyright (C) 1996, 1997, 1999 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
+
+#include <string.h>
+#include <sys/mman.h>
+
+#include "store.h"
+
+/* Initialize ENC.  The given vector and sizes will be used for the encoding
+   if they are big enough (otherwise new ones will be automatically
+   allocated).  */
+void
+store_enc_init (struct store_enc *enc,
+		mach_port_t *ports, mach_msg_type_number_t num_ports,
+		int *ints, mach_msg_type_number_t num_ints,
+		off_t *offsets, mach_msg_type_number_t num_offsets,
+		char *data, mach_msg_type_number_t data_len)
+{
+  bzero (enc, sizeof (*enc));
+
+  enc->ports = enc->init_ports = ports;
+  enc->num_ports = num_ports;
+  enc->ints = enc->init_ints = ints;
+  enc->num_ints = num_ints;
+  enc->offsets = enc->init_offsets = offsets;
+  enc->num_offsets = num_offsets;
+  enc->data = enc->init_data = data;
+  enc->data_len = data_len;
+}
+
+/* Deallocate storage used by the fields in ENC (but nothing is done with ENC
+   itself).  */
+void
+store_enc_dealloc (struct store_enc *enc)
+{
+  if (enc->ports && enc->num_ports > 0)
+    /* For ports, we must deallocate each port as well.  */
+    {
+      while (enc->cur_port < enc->num_ports)
+	{
+	  mach_port_t port = enc->ports[enc->cur_port++];
+	  if (port != MACH_PORT_NULL)
+	    mach_port_deallocate (mach_task_self (), port);
+	}
+
+      if (enc->ports != enc->init_ports)
+	munmap ((caddr_t) enc->ports, enc->num_ports * sizeof (*enc->ports));
+    }
+
+  if (enc->ints && enc->num_ints > 0 && enc->ints != enc->init_ints)
+    munmap ((caddr_t) enc->ints, enc->num_ints * sizeof (*enc->ints));
+
+  if (enc->offsets && enc->num_offsets > 0
+      && enc->offsets != enc->init_offsets)
+    munmap ((caddr_t) enc->offsets, enc->num_offsets * sizeof (*enc->offsets));
+
+  if (enc->data && enc->data_len > 0 && enc->data != enc->init_data)
+    munmap (enc->data, enc->data_len);
+
+  /* For good measure...  */
+  bzero (enc, sizeof (*enc));
+}
+
+/* Copy out the parameters from ENC into the given variables suitably for
+   returning from a file_get_storage_info rpc, and deallocate ENC.  */
+void
+store_enc_return (struct store_enc *enc,
+		  mach_port_t **ports, mach_msg_type_number_t *num_ports,
+		  int **ints, mach_msg_type_number_t *num_ints,
+		  off_t **offsets, mach_msg_type_number_t *num_offsets,
+		  char **data, mach_msg_type_number_t *data_len)
+{
+  *ports = enc->ports;
+  *num_ports = enc->num_ports;
+  *ints = enc->ints;
+  *num_ints = enc->num_ints;
+  *offsets = enc->offsets;
+  *num_offsets = enc->num_offsets;
+  *data = enc->data;
+  *data_len = enc->data_len;
+}