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-rw-r--r--source3/lib/string_init.c77
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 0000000000..40a6ef059b
--- /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));
+}