Macro XSET (from Fraktal SAS Programming)

Code executed	Function performed
%MACRO xset(xvar);	Start Macro definition with name and positional parameter 'xvar'
filename path pipe "set" lrecl = 2048;
data _NULL_;
length xvar $256 xval $1024;
infile path dlm = '=';
input xvar $ xval $;
xvar = upcase(translate(xvar,'_','(-)'));
%IF %LENGTH(&XVAR.) <> 0 %THEN %DO;
if trim(xvar) = "%UPCASE(&XVAR.)";
%END;
call symput(compress(xvar),compress(xval));
run;
filename path clear;
%MEND xset;	End Macro definition with name