Move lib/util from source4 to top-level libutil.

Conflicts:

	source4/Makefile

1 files changed, 123 insertions, 0 deletions

diff --git a/lib/util/data_blob.h b/lib/util/data_blob.h
new file mode 100644
index 0000000000..e9dca67772
--- /dev/null
+++ b/lib/util/data_blob.h
@@ -0,0 +1,123 @@
+/* 
+   Unix SMB/CIFS implementation.
+   DATA BLOB
+   
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+/* This is a public header file that is installed as part of Samba. 
+ * If you remove any functions or change their signature, update 
+ * the so version number. */
+
+#ifndef _SAMBA_DATABLOB_H_
+#define _SAMBA_DATABLOB_H_
+
+#ifndef _PUBLIC_
+#define _PUBLIC_
+#endif
+
+#include <talloc.h>
+#include <stdint.h>
+
+/* used to hold an arbitrary blob of data */
+typedef struct datablob {
+	uint8_t *data;
+	size_t length;
+} DATA_BLOB;
+
+struct data_blob_list_item {
+	struct data_blob_list_item *prev,*next;
+	DATA_BLOB blob;
+};
+
+/* by making struct ldb_val and DATA_BLOB the same, we can simplify
+   a fair bit of code */
+#define ldb_val datablob
+
+#define data_blob(ptr, size) data_blob_named(ptr, size, "DATA_BLOB: "__location__)
+#define data_blob_talloc(ctx, ptr, size) data_blob_talloc_named(ctx, ptr, size, "DATA_BLOB: "__location__)
+#define data_blob_dup_talloc(ctx, blob) data_blob_talloc_named(ctx, (blob)->data, (blob)->length, "DATA_BLOB: "__location__)
+
+/**
+ construct a data blob, must be freed with data_blob_free()
+ you can pass NULL for p and get a blank data blob
+**/
+_PUBLIC_ DATA_BLOB data_blob_named(const void *p, size_t length, const char *name);
+
+/**
+ construct a data blob, using supplied TALLOC_CTX
+**/
+_PUBLIC_ DATA_BLOB data_blob_talloc_named(TALLOC_CTX *mem_ctx, const void *p, size_t length, const char *name);
+
+/**
+ reference a data blob, to the supplied TALLOC_CTX.  
+ Returns a NULL DATA_BLOB on failure
+**/
+_PUBLIC_ DATA_BLOB data_blob_talloc_reference(TALLOC_CTX *mem_ctx, DATA_BLOB *blob);
+
+/**
+ construct a zero data blob, using supplied TALLOC_CTX. 
+ use this sparingly as it initialises data - better to initialise
+ yourself if you want specific data in the blob
+**/
+_PUBLIC_ DATA_BLOB data_blob_talloc_zero(TALLOC_CTX *mem_ctx, size_t length);
+
+/**
+free a data blob
+**/
+_PUBLIC_ void data_blob_free(DATA_BLOB *d);
+
+/**
+clear a DATA_BLOB's contents
+**/
+_PUBLIC_ void data_blob_clear(DATA_BLOB *d);
+
+/**
+free a data blob and clear its contents
+**/
+_PUBLIC_ void data_blob_clear_free(DATA_BLOB *d);
+
+/**
+check if two data blobs are equal
+**/
+_PUBLIC_ int data_blob_cmp(const DATA_BLOB *d1, const DATA_BLOB *d2);
+
+/**
+print the data_blob as hex string
+**/
+_PUBLIC_ char *data_blob_hex_string(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob);
+
+/**
+  useful for constructing data blobs in test suites, while
+  avoiding const warnings
+**/
+_PUBLIC_ DATA_BLOB data_blob_string_const(const char *str);
+
+/**
+ * Create a new data blob from const data 
+ */
+_PUBLIC_ DATA_BLOB data_blob_const(const void *p, size_t length);
+
+/**
+  realloc a data_blob
+**/
+_PUBLIC_ bool data_blob_realloc(TALLOC_CTX *mem_ctx, DATA_BLOB *blob, size_t length);
+
+/**
+  append some data to a data blob
+**/
+_PUBLIC_ bool data_blob_append(TALLOC_CTX *mem_ctx, DATA_BLOB *blob,
+				   const void *p, size_t length);
+
+#endif /* _SAMBA_DATABLOB_H_ */