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diff --git a/src/ceph/src/dmclock/sim/src/str_list.h b/src/ceph/src/dmclock/sim/src/str_list.h
new file mode 100644
index 0000000..4ba0cad
--- /dev/null
+++ b/src/ceph/src/dmclock/sim/src/str_list.h
@@ -0,0 +1,94 @@
+#ifndef CEPH_STRLIST_H
+#define CEPH_STRLIST_H
+
+#include <list>
+#include <set>
+#include <sstream>
+#include <string>
+#include <vector>
+
+/**
+ * Split **str** into a list of strings, using the ";,= \t" delimiters and output the result in **str_list**.
+ * 
+ * @param [in] str String to split and save as list
+ * @param [out] str_list List modified containing str after it has been split
+**/
+extern void get_str_list(const std::string& str,
+			 std::list<std::string>& str_list);
+
+/**
+ * Split **str** into a list of strings, using the **delims** delimiters and output the result in **str_list**.
+ * 
+ * @param [in] str String to split and save as list
+ * @param [in] delims characters used to split **str**
+ * @param [out] str_list List modified containing str after it has been split
+**/
+extern void get_str_list(const std::string& str,
+                         const char *delims,
+			 std::list<std::string>& str_list);
+
+/**
+ * Split **str** into a list of strings, using the ";,= \t" delimiters and output the result in **str_vec**.
+ * 
+ * @param [in] str String to split and save as Vector
+ * @param [out] str_vec Vector modified containing str after it has been split
+**/
+extern void get_str_vec(const std::string& str,
+			 std::vector<std::string>& str_vec);
+
+/**
+ * Split **str** into a list of strings, using the **delims** delimiters and output the result in **str_vec**.
+ * 
+ * @param [in] str String to split and save as Vector
+ * @param [in] delims characters used to split **str**
+ * @param [out] str_vec Vector modified containing str after it has been split
+**/
+extern void get_str_vec(const std::string& str,
+                         const char *delims,
+			 std::vector<std::string>& str_vec);
+
+/**
+ * Split **str** into a list of strings, using the ";,= \t" delimiters and output the result in **str_list**.
+ * 
+ * @param [in] str String to split and save as Set
+ * @param [out] str_list Set modified containing str after it has been split
+**/
+extern void get_str_set(const std::string& str,
+			std::set<std::string>& str_list);
+
+/**
+ * Split **str** into a list of strings, using the **delims** delimiters and output the result in **str_list**.
+ * 
+ * @param [in] str String to split and save as Set
+ * @param [in] delims characters used to split **str**
+ * @param [out] str_list Set modified containing str after it has been split
+**/
+extern void get_str_set(const std::string& str,
+                        const char *delims,
+			std::set<std::string>& str_list);
+
+/**
+ * Return a String containing the vector **v** joined with **sep**
+ * 
+ * If **v** is empty, the function returns an empty string
+ * For each element in **v**,
+ * it will concatenate this element and **sep** with result
+ * 
+ * @param [in] v Vector to join as a String
+ * @param [in] sep String used to join each element from **v**
+ * @return empty string if **v** is empty or concatenated string
+**/
+inline std::string str_join(const std::vector<std::string>& v, std::string sep)
+{
+  if (v.empty())
+    return std::string();
+  std::vector<std::string>::const_iterator i = v.begin();
+  std::string r = *i;
+  for (++i; i != v.end(); ++i) {
+    r += sep;
+    r += *i;
+  }
+  return r;
+}
+
+#endif