/*<pre><b>
/ Program   : trim.sas
/ Version   : 1.0
/ Author    : Roland Rashleigh-Berry
/ Date      : 04-May-2011
/ Purpose   : Function-style macro to trim the contents of a macro variable
/ SubMacros : %verifyb
/ Notes     : This is a function-style macro.
/ Usage     : %let macvar=%trim(&macvar);
/ 
/===============================================================================
/ PARAMETERS:
/-------name------- -------------------------description------------------------
/ string            (pos) String to trim
/===============================================================================
/ AMENDMENT HISTORY:
/ init --date-- mod-id ----------------------description------------------------
/ rrb  13Feb07         "macro called" message added
/ rrb  30Jul07         Header tidy
/ rrb  04May11         Code tidy
/===============================================================================
/ This is public domain software. No guarantee as to suitability or accuracy is
/ given or implied. User uses this code entirely at their own risk.
/=============================================================================*/

%put MACRO CALLED: trim v1.0;

%macro trim(string);
  %if %length(%sysfunc(compress(&string,%str( ))))
    %then %substr(&string,1,%verifyb(&string,%str( )));
%mend trim;