1 files changed, 77 insertions, 0 deletions
diff --git a/source3/lib/string_init.c b/source3/lib/string_init.c
new file mode 100644
index 00000000000..40a6ef059ba
--- /dev/null
+++ b/source3/lib/string_init.c
@@ -0,0 +1,77 @@
+/*
+   Unix SMB/CIFS implementation.
+   Samba utility functions
+
+   Copyright (C) Andrew Tridgell 1992-2001
+   Copyright (C) Simo Sorce      2001-2002
+   Copyright (C) Martin Pool     2003
+   Copyright (C) James Peach	 2006
+   Copyright (C) Jeremy Allison  1992-2007
+
+   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/>.
+*/
+
+#include "includes.h"
+
+/* this is used to prevent lots of mallocs of size 1 */
+static const char null_string[] = "";
+
+/**
+ Set a string value, allocing the space for the string
+**/
+
+static bool string_init(char **dest,const char *src)
+{
+	size_t l;
+
+	if (!src)
+		src = "";
+
+	l = strlen(src);
+
+	if (l == 0) {
+		*dest = discard_const_p(char, null_string);
+	} else {
+		(*dest) = SMB_STRDUP(src);
+		if ((*dest) == NULL) {
+			DEBUG(0,("Out of memory in string_init\n"));
+			return false;
+		}
+	}
+	return(true);
+}
+
+/**
+ Free a string value.
+**/
+
+void string_free(char **s)
+{
+	if (!s || !(*s))
+		return;
+	if (*s == null_string)
+		*s = NULL;
+	SAFE_FREE(*s);
+}
+
+/**
+ Set a string value, deallocating any existing space, and allocing the space
+ for the string
+**/
+
+bool string_set(char **dest,const char *src)
+{
+	string_free(dest);
+	return(string_init(dest,src));
+}