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/* 
   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_

#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
**/
DATA_BLOB data_blob_named(const void *p, size_t length, const char *name);

/**
 construct a data blob, using supplied TALLOC_CTX
**/
DATA_BLOB data_blob_talloc_named(TALLOC_CTX *mem_ctx, const void *p, size_t length, const char *name);

/**
free a data blob
**/
void data_blob_free(DATA_BLOB *d);

extern const DATA_BLOB data_blob_null;

#endif /* _SAMBA_DATABLOB_H_ */