Major string_view refactor. Added namespace sv

luprex/core/cpp/drivenengine.cpp

@@ -1,12 +1,12 @@
 #include "wrap-string.hpp"
 #include "wrap-vector.hpp"
+#include "util.hpp"
+#include "drivenengine.hpp"
 
 #include <utility>
 #include <iostream>
 #include <cstring>
 
-#include "drivenengine.hpp"
-
 DrivenEngineReg *DrivenEngineReg::All;
 
 DrivenEngineReg::DrivenEngineReg(const char *n, DrivenEngineMaker fn) {
@@ -66,7 +66,7 @@ void Channel::echo_command() {
     }
 
     // Find out how much of the command matches.
-    int match = util::common_prefix_length(current_command_, desired_command_);
+    int match = sv::common_prefix_length(current_command_, desired_command_);
 
     // Echo backspaces to remove the non-matching part.
     int remove = current_command_.size() - match;