Add strutils::starts_with and strutils::ends_with

simgear/misc/strutils.cxx

@@ -200,5 +200,18 @@ namespace simgear {
 	    return reply.insert( 0, length-l, c );
 	}
 
+	bool
+	starts_with( const string & s, const string & substr )
+	{	
+		return s.find( substr ) == 0;
+	}
+
+	bool
+	ends_with( const string & s, const string & substr )
+	{	
+		size_t n = s.rfind( substr );
+		return (n != string::npos) && (n == s.length() - substr.length());
+	}
+
     } // end namespace strutils
 } // end namespace simgear

simgear/misc/strutils.hxx

@@ -97,6 +97,24 @@ namespace simgear {
 	split( const std::string& s,
 	       const char* sep = 0,
 	       int maxsplit = 0 );
+
+	/**
+	 * Test if a string starts with a string 
+	 *
+	 * @param s The string to be tested
+	 * @param substr The string to test
+	 * @return True, if s starts with substr, False otherwise
+	 */
+	bool starts_with( const std::string & s, const std::string & substr );
+
+	/**
+	 * Test if a string ends with a string 
+	 *
+	 * @param s The string to be tested
+	 * @param substr The string to test
+	 * @return True, if s ends with substr, False otherwise
+	 */
+	bool ends_with( const std::string & s, const std::string & substr );
   
   } // end namespace strutils
 } // end namespace simgear