r13658: More moving around of files:

 - Collect the generic utility functions into a lib/util/ (a la GLib is
		for the GNOME folks)
 - Remove even more files from include/
(This used to be commit ba62880f5b05c2a505dc7f54676b231197a7e707)

1 files changed, 209 insertions, 0 deletions

diff --git a/source4/lib/util/data_blob.c b/source4/lib/util/data_blob.c
new file mode 100644
index 0000000000..c6471fbf54
--- /dev/null
+++ b/source4/lib/util/data_blob.c
@@ -0,0 +1,209 @@
+/* 
+   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"
+
+/*******************************************************************
+ 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)
+{
+	DATA_BLOB ret;
+
+	if (p == NULL && length == 0) {
+		ZERO_STRUCT(ret);
+		return ret;
+	}
+
+	if (p) {
+		ret.data = talloc_memdup(NULL, p, length);
+	} else {
+		ret.data = talloc_size(NULL, length);
+	}
+	if (ret.data == NULL) {
+		ret.length = 0;
+		return ret;
+	}
+	talloc_set_name_const(ret.data, name);
+	ret.length = length;
+	return ret;
+}
+
+/*******************************************************************
+ 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)
+{
+	DATA_BLOB ret = data_blob_named(p, length, name);
+
+	if (ret.data) {
+		talloc_steal(mem_ctx, ret.data);
+	}
+	return ret;
+}
+
+
+/*******************************************************************
+ reference a data blob, to the supplied TALLOC_CTX.  
+ Returns a NULL DATA_BLOB on failure
+*******************************************************************/
+DATA_BLOB data_blob_talloc_reference(TALLOC_CTX *mem_ctx, DATA_BLOB *blob)
+{
+	DATA_BLOB ret = *blob;
+
+	ret.data = talloc_reference(mem_ctx, blob->data);
+
+	if (!ret.data) {
+		return data_blob(NULL, 0);
+	}
+	return ret;
+}
+
+/*******************************************************************
+ 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
+*******************************************************************/
+DATA_BLOB data_blob_talloc_zero(TALLOC_CTX *mem_ctx, size_t length)
+{
+	DATA_BLOB blob = data_blob_talloc(mem_ctx, NULL, length);
+	data_blob_clear(&blob);
+	return blob;
+}
+
+/*******************************************************************
+free a data blob
+*******************************************************************/
+void data_blob_free(DATA_BLOB *d)
+{
+	if (d) {
+		talloc_free(d->data);
+		d->data = NULL;
+		d->length = 0;
+	}
+}
+
+/*******************************************************************
+clear a DATA_BLOB's contents
+*******************************************************************/
+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);
+}
+
+
+/*******************************************************************
+check if two data blobs are equal
+*******************************************************************/
+BOOL data_blob_equal(const DATA_BLOB *d1, const DATA_BLOB *d2)
+{
+	if (d1->length != d2->length) {
+		return False;
+	}
+	if (d1->data == d2->data) {
+		return True;
+	}
+	if (d1->data == NULL || d2->data == NULL) {
+		return False;
+	}
+	if (memcmp(d1->data, d2->data, d1->length) == 0) {
+		return True;
+	}
+	return False;
+}
+
+/*******************************************************************
+print the data_blob as hex string
+*******************************************************************/
+char *data_blob_hex_string(TALLOC_CTX *mem_ctx, DATA_BLOB *blob)
+{
+	int i;
+	char *hex_string;
+
+	hex_string = talloc_array(mem_ctx, char, (blob->length*2)+1);
+	if (!hex_string) {
+		return NULL;
+	}
+
+	for (i = 0; i < blob->length; i++)
+		slprintf(&hex_string[i*2], 3, "%02X", blob->data[i]);
+
+	return hex_string;
+}
+
+/*
+  useful for constructing data blobs in test suites, while
+  avoiding const warnings
+*/
+DATA_BLOB data_blob_string_const(const char *str)
+{
+	DATA_BLOB blob;
+	blob.data = discard_const(str);
+	blob.length = strlen(str);
+	return blob;
+}
+
+DATA_BLOB data_blob_const(const void *p, size_t length)
+{
+	DATA_BLOB blob;
+	blob.data = discard_const(p);
+	blob.length = length;
+	return blob;
+}
+
+
+/*
+  realloc a data_blob
+*/
+NTSTATUS data_blob_realloc(TALLOC_CTX *mem_ctx, DATA_BLOB *blob, size_t length)
+{
+	blob->data = talloc_realloc_size(mem_ctx, blob->data, length);
+	NT_STATUS_HAVE_NO_MEMORY(blob->data);	
+	blob->length = length;
+	return NT_STATUS_OK;
+}
+
+/*
+  append some data to a data blob
+*/
+NTSTATUS data_blob_append(TALLOC_CTX *mem_ctx, DATA_BLOB *blob,
+			  const void *p, size_t length)
+{
+	blob->data = talloc_realloc_size(mem_ctx, blob->data,
+					 blob->length + length);
+	NT_STATUS_HAVE_NO_MEMORY(blob->data);	
+	memcpy(blob->data + blob->length, p, length);
+	blob->length += length;
+	return NT_STATUS_OK;
+}
+