Move most StreamBuffer code into base-buffer.hpp

luprex/cpp/core/drivenengine.cpp

@@ -3,6 +3,7 @@
 #include "util.hpp"
 #include "drivenengine.hpp"
 #include "world.hpp"
+#include "base-buffer.hpp"
 
 #include <string_view>
 #include <utility>
@@ -481,7 +482,7 @@ void DrivenEngine::drv_invoke_event_update(double clock) {
 }
 
 void DrivenEngine::drv_set_lua_source(uint32_t srcpklen, const char *srcpk) {
-    StreamBuffer sb(srcpk, srcpklen);
+    StreamBuffer sb(std::string_view(srcpk, srcpklen));
     uint32_t nfiles = sb.read_uint32();
     lua_source_.reset(new util::LuaSourceVec);
     lua_source_->resize(nfiles);