Partially working text editor

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@99 0fc631ac-6414-0410-93d0-97cfa31319b6

src/util/string.cpp

@@ -62,6 +62,10 @@ String trim_left(const String& s) {
 	}
 }
 
+String substr_replace(const String& input, size_t start, size_t end, const String& replacement) {
+	return input.substr(0,start) + replacement + input.substr(end);
+}
+
 // ----------------------------------------------------------------------------- : Words
 
 String last_word(const String& s) {