Implement probe_lua and add it to lpxclient/lpxserver

luprex/core/cpp/util.cpp

@@ -185,6 +185,18 @@ std::string toupper(std::string input) {
     return input;
 }
 
+bool has_prefix(const std::string &s, const std::string &prefix) {
+    return 0 == s.compare(0, prefix.size(), prefix);
+}
+
+bool has_suffix(const std::string &s, const std::string &suffix) {
+    if (s.length() >= suffix.length()) {
+        return (0 == s.compare (s.length() - suffix.length(), suffix.length(), suffix));
+    } else {
+        return false;
+    }
+}
+
 bool validinteger(const std::string &value) {
     char *endptr;
     if (value.size() == 0) return false;