qcacmn: Add qdf_str_dup() API

Add a QDF abstraction for strdup().

Change-Id: I141e625a91e3433c2a66bc75b4e860ed6ef266ac
CRs-Fixed: 2194537

qdf/inc/qdf_str.h

@@ -40,6 +40,17 @@ static inline bool qdf_is_space(char c)
 	return __qdf_is_space(c);
 }
 
+/**
+ * qdf_str_dup() - duplicate null-terminated string @src
+ * @dest: double pointer to be populated
+ * @src: the null-terminated string to be duplicated
+ *
+ * @dest must be freed using qdf_mem_free() to avoid memory leaks.
+ *
+ * Return: QDF_STATUS; @dest set to NULL on failure, a valid address on success
+ */
+QDF_STATUS qdf_str_dup(char **dest, const char *src);
+
 /**
  * qdf_str_left_trim() - Trim any leading whitespace from @str
  * @str: the string to trim

qdf/src/qdf_str.c

@@ -19,6 +19,31 @@
 #include "qdf_mem.h"
 #include "qdf_module.h"
 #include "qdf_str.h"
+#include "qdf_trace.h"
+
+QDF_STATUS qdf_str_dup(char **dest, const char *src)
+{
+	qdf_size_t size;
+	char *dup;
+
+	*dest = NULL;
+
+	QDF_BUG(src);
+	if (!src)
+		return QDF_STATUS_E_INVAL;
+
+	/* size = length + null-terminator */
+	size = qdf_str_len(src) + 1;
+	dup = qdf_mem_malloc(size);
+	if (!dup)
+		return QDF_STATUS_E_NOMEM;
+
+	qdf_mem_copy(dup, src, size);
+	*dest = dup;
+
+	return QDF_STATUS_SUCCESS;
+}
+qdf_export_symbol(qdf_str_dup);
 
 void qdf_str_right_trim(char *str)
 {