feat: new mp_aligndecimal macro

Includes a test, and an update to the mp_assertcolvals test to include a new test type (NOVAL)

base/mp_aligndecimal.sas

@@ -0,0 +1,94 @@
+/**
+  @file
+  @brief Apply leading blanks to align numbers vertically in a char variable
+  @details This is particularly useful when storing numbers (as character) that
+  need to be sorted.
+
+  It works by splitting the number left and right of the decimal place, and
+  aligning it accordingly.  A temporary variable is created as part of this
+  process (which is automatically dropped)
+
+  The macro can be used only in data step, eg as follows:
+
+      data _null_;
+        length myvar $50;
+        do i=1 to 1000 by 50;
+          if mod(i,2)=0 then j=ranuni(0)*i*100;
+          else j=i*100;
+
+          %mp_aligndecimal(myvar,width=7)
+
+          leading_spaces=length(myvar)-length(cats(myvar));
+          putlog +leading_spaces myvar;
+        end;
+      run;
+
+  The generated code will look something like this:
+
+      length aligndp4e49996 $7;
+      if index(myvar,'.') then do;
+        aligndp4e49996=cats(scan(myvar,1,'.'));
+        aligndp4e49996=right(aligndp4e49996);
+        myvar=aligndp4e49996!!'.'!!cats(scan(myvar,2,'.'));
+      end;
+      else do;
+        aligndp4e49996=myvar;
+        aligndp4e49996=right(aligndp4e49996);
+        myvar=aligndp4e49996;
+      end;
+
+  Results (myvar variable):
+
+                0.7683559324
+              122.8232796
+            99419.50552
+            42938.5143414
+              763.3799189
+            15170.606073
+            15083.285773
+            85443.198707
+          2022999.2251
+            12038.658867
+          1350582.6734
+            52777.258221
+            11723.347628
+            33101.268376
+          6181622.8603
+          7390614.0669
+            73384.537893
+          1788362.1016
+          2774586.2219
+          7998580.8415
+
+
+  @param var The (data step) variable to create
+  @param width= (8) The number of characters BEFORE the decimal point
+
+  <h4> SAS Macros </h4>
+  @li mf_getuniquename.sas
+
+  <h4> Related Programs </h4>
+  @li mp_aligndecimal.test.sas
+
+  @version 9.2
+  @author Allan Bowe
+**/
+
+%macro mp_aligndecimal(var,width=8);
+
+  %local tmpvar;
+  %let tmpvar=%mf_getuniquename(prefix=aligndp);
+  length &tmpvar $&width;
+  if index(&var,'.') then do;
+    &tmpvar=cats(scan(&var,1,'.'));
+    &tmpvar=right(&tmpvar);
+    &var=&tmpvar!!'.'!!cats(scan(&var,2,'.'));
+  end;
+  else do;
+    &tmpvar=cats(&var);
+    &tmpvar=right(&tmpvar);
+    &var=&tmpvar;
+  end;
+  drop &tmpvar;
+
+%mend mp_aligndecimal;