string pad/rpad/lpad

ml_string.h

@@ -6,9 +6,10 @@
 #include <string>
 #include <regex>
 
-
 // Replace a substring with a replacement string in a source string
 void replace_substring(std::string &src, const std::string &substr, const std::string &replacement);
 
 // Returns true if where contains regex
 bool regexp_search(const std::string &where, const std::string &regex_str);
+
+std::string string_padd(const std::string & str, int pad_len, char fill_char, bool from_right);