+%%%%%%%%%%%%%%%% escape to \LaTeX
+\lstloadaspects{escape}
+\gdef\lst@Escape#1#2#3#4{%
+ \lst@CArgX #1\relax\lst@CDefX
+ {}%
+ {\lst@ifdropinput\else
+ \lst@TrackNewLines\lst@OutputLostSpace \lst@XPrintToken
+ \lst@InterruptModes
+ \lst@EnterMode{\lst@TeXmode}{\lst@modetrue}%
+ \ifx\^^M#2%
+ \lst@CArg #2\relax\lst@ActiveCDefX
+ {}%
+ {\lst@escapeend #4\lst@LeaveAllModes\lst@ReenterModes}%
+ {\lst@MProcessListing}%
+ \else
+ \lst@CArg #2\relax\lst@ActiveCDefX
+ {}%
+ {\lst@escapeend #4\lst@LeaveAllModes\lst@ReenterModes
+ \lst@newlines\z@ \lst@whitespacefalse}%
+ {}%
+ \fi
+ #3\catcode"FFFFF=9\lst@escapebegin%"
+ \fi}%
+ {}}
+
+%%%%%%%%%%%%%%%%
+\lstloadaspects{writefile}
+\begingroup \catcode`\^^I=11
+\gdef\lst@WFBegin#1#2{%
+ \begingroup
+ \let\lst@OutputBox#1%
+ \def\lst@Append##1{%
+ \advance\lst@length\@ne
+ \expandafter\lst@token\expandafter{\the\lst@token##1}%
+ \ifx ##1\lst@outputspace \else
+ \lst@WFAppend##1%
+ \fi}%
+ \lst@lAddTo\lst@PreGotoTabStop{\lst@WFAppend{^^I}}%
+ \lst@lAddTo\lst@ProcessSpace{\lst@WFAppend{ }}%
+ \def\ltj@lst@ProcessIVS##1{\lst@whitespacefalse\lst@Append##1}%
+ \def\ltj@lst@ProcessVS##1{\lst@whitespacefalse\lst@Append##1}%
+ \let\lst@DeInit\lst@WFDeInit
+ \let\lst@MProcessListing\lst@WFMProcessListing
+ \lst@WFifopen\else
+ \immediate\openout\lst@WF=#2\relax
+ \global\let\lst@WFifopen\iftrue
+ \@gobbletwo\fi\fi
+ \fi}
+\endgroup
+