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/*
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Unix SMB/CIFS implementation.
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Easy management of byte-length data
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Copyright (C) Andrew Tridgell 2001
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Copyright (C) Andrew Bartlett 2001
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include "data_blob.h"
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#ifndef ZERO_STRUCT
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#define ZERO_STRUCT(x) memset((char *)&(x), 0, sizeof(x))
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#endif
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const DATA_BLOB data_blob_null = { NULL, 0 };
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/**
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* @file
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* @brief Manipulation of arbitrary data blobs
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**/
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/**
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construct a data blob, must be freed with data_blob_free()
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you can pass NULL for p and get a blank data blob
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**/
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DATA_BLOB data_blob_named(const void *p, size_t length, const char *name)
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{
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DATA_BLOB ret;
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if (p == NULL && length == 0) {
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ZERO_STRUCT(ret);
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return ret;
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}
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if (p) {
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ret.data = (uint8_t *)talloc_memdup(NULL, p, length);
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} else {
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ret.data = talloc_array(NULL, uint8_t, length);
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}
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if (ret.data == NULL) {
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ret.length = 0;
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return ret;
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}
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talloc_set_name_const(ret.data, name);
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ret.length = length;
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return ret;
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}
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/**
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construct a data blob, using supplied TALLOC_CTX
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**/
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DATA_BLOB data_blob_talloc_named(TALLOC_CTX *mem_ctx, const void *p, size_t length, const char *name)
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{
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DATA_BLOB ret = data_blob_named(p, length, name);
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if (ret.data) {
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talloc_steal(mem_ctx, ret.data);
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}
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return ret;
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}
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/**
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free a data blob
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**/
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void data_blob_free(DATA_BLOB *d)
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{
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if (d) {
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talloc_free(d->data);
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d->data = NULL;
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d->length = 0;
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}
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}
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