Initial import

[samba] / source / lib / data_blob.c

diff --git a/source/lib/data_blob.c b/source/lib/data_blob.c
new file mode 100644 (file)
index 0000000..ccd0d27
--- /dev/null
+++ b/source/lib/data_blob.c
@@ -0,0 +1,120 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Easy management of byte-length data
+   Copyright (C) Andrew Tridgell 2001
+   Copyright (C) Andrew Bartlett 2001
+   
+   This program 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 of the License, or
+   (at your option) any later version.
+   
+   This program 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 "includes.h"
+
+/*******************************************************************
+ Free() a data blob.
+*******************************************************************/
+
+static void free_data_blob(DATA_BLOB *d)
+{
+       if ((d) && (d->free)) {
+               SAFE_FREE(d->data);
+       }
+}
+
+/*******************************************************************
+ Construct a data blob, must be freed with data_blob_free().
+ You can pass NULL for p and get a blank data blob
+*******************************************************************/
+
+DATA_BLOB data_blob(const void *p, size_t length)
+{
+       DATA_BLOB ret;
+
+       if (!length) {
+               ZERO_STRUCT(ret);
+               return ret;
+       }
+
+       if (p) {
+               ret.data = smb_xmemdup(p, length);
+       } else {
+               ret.data = SMB_XMALLOC_ARRAY(unsigned char, length);
+       }
+       ret.length = length;
+       ret.free = free_data_blob;
+       return ret;
+}
+
+/*******************************************************************
+ Construct a data blob, using supplied TALLOC_CTX.
+*******************************************************************/
+
+DATA_BLOB data_blob_talloc(TALLOC_CTX *mem_ctx, const void *p, size_t length)
+{
+       DATA_BLOB ret;
+
+       if (!length) {
+               ZERO_STRUCT(ret);
+               return ret;
+       }
+
+       if (p) {
+               ret.data = TALLOC_MEMDUP(mem_ctx, p, length);
+               if (ret.data == NULL)
+                       smb_panic("data_blob_talloc: talloc_memdup failed.\n");
+       } else {
+               ret.data = TALLOC(mem_ctx, length);
+               if (ret.data == NULL)
+                       smb_panic("data_blob_talloc: talloc failed.\n");
+       }
+
+       ret.length = length;
+       ret.free = NULL;
+       return ret;
+}
+
+/*******************************************************************
+ Free a data blob.
+*******************************************************************/
+
+void data_blob_free(DATA_BLOB *d)
+{
+       if (d) {
+               if (d->free) {
+                       (d->free)(d);
+               }
+               d->length = 0;
+       }
+}
+
+/*******************************************************************
+ Clear a DATA_BLOB's contents
+*******************************************************************/
+
+static void data_blob_clear(DATA_BLOB *d)
+{
+       if (d->data) {
+               memset(d->data, 0, d->length);
+       }
+}
+
+/*******************************************************************
+ Free a data blob and clear its contents
+*******************************************************************/
+
+void data_blob_clear_free(DATA_BLOB *d)
+{
+       data_blob_clear(d);
+       data_blob_free(d);
+}