New WSL stack transformation script

This is an experimental script that was used to tune the
stack operations. It is mostly included as an example.

diff --git a/src-wsl/transf-stack.wsl b/src-wsl/transf-stack.wsl
new file mode 100755 (executable)
index 0000000..5f277da
--- /dev/null
+++ b/src-wsl/transf-stack.wsl
@@ -0,0 +1,142 @@
+C:"
+Copyright (C) 2015 Doni Pracner http://perun.dmi.rs/pracner
+
+This program is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public
+License as published by the Free Software Foundation; either
+version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be
+useful, but WITHOUT ANY WARRANTY; without even the implied
+warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+PURPOSE. See the GNU General Public License for more
+details.
+
+You should have received a copy of the GNU General Public
+License along with this program. If not, see
+<http://www.gnu.org/licenses/>.
+==========================================================";
+
+C:"This version was used for some experiments with stacks.
+
+It is left in here as an example of how some transformations
+can be applied.";
+MW_PROC @Process_Prog() ==
+       
+       had_trans := 1;
+       WHILE had_trans > 0 DO
+       
+       had_trans := 0;
+       
+       C:"start of the program";
+       @Goto(< >);
+       C:"'manual' navigating to find the procedures";
+       DO IF @Spec_Type(@Item) = T_Proc THEN 
+               IF @Trans?(TR_Stack_To_Par) THEN
+                       had_trans := 1; PRINT("----- STACK TO PAR -------"); @Trans(TR_Stack_To_Par, "") FI; FI;
+     IF @Down? THEN @Down
+     ELSIF @Right? THEN @Right
+     ELSIF @Up?
+       THEN @Up; WHILE @Up? AND NOT @Right? DO @Up OD;
+           IF @Right? THEN @Right ELSE EXIT(1) FI
+       ELSE EXIT(1) FI OD
+       ;
+       
+       ATEACH Statement DO
+             IF @Trans?(TR_Stack_To_Var) THEN
+                       had_trans := 1; PRINT("----- STACK TO VAR -------"); @Trans(TR_Stack_To_Var,"")
+             FI
+       OD
+       OD;
+       SKIP
+END;
+
+C:"Here are some pieces that are not used, but could be
+useful in some experiments later";
+MW_PROC @Not_Used() ==
+       @Goto(< >);
+       IF @Trans?(TR_Remove_Redundant_Vars) THEN
+               @Trans(TR_Remove_Redundant_Vars,"") FI;
+       SKIP
+END;
+
+C:"----------------------------------------";
+
+C:"The rest of the code is loaders and similar procedures,
+very similar to other transf programs.";
+
+MW_PROC @Process_File(filename) ==
+               IF @File_Exists?(filename) THEN
+                       @New_Program(@Parse_File(filename, T_Statements));
+                       PRINT("Processing: ", filename);
+                       prog := @Program;
+                       @Process_Prog();
+                       @Get_New_Name(VAR filename);
+                       @PP_Item(@Program, 80, filename);
+                       PRINT("<Metrics>");
+                       PRINT(filename);
+                       @Prog_Stat_Comp(prog, @Program);
+                       PRINT("</Metrics>")
+               ELSE
+                       PRINT("ERROR: File ",filename," not found");
+               FI
+END;
+
+MW_PROC @Get_New_Name(VAR str) == 
+       IF @Ends_With?(str, ".wsl") THEN
+               str := SUBSTR(str, 0, SLENGTH(str)-4)
+       FI;
+       str := str ++ "_t.wsl"
+END;
+
+MW_PROC @Prog_Stat_Comp(Pro, After VAR)==
+  VAR < ma := 0, mb :=1 > :
+  ma := @McCabe(Pro);
+  mb := @McCabe(After);
+  PRINT ("McCabe ", ma, "  ", mb, "  ",(mb-ma));
+  ma := @Stat_Count(Pro);
+  mb := @Stat_Count(After);
+  PRINT ("Statem ", ma, "  ",mb, "  ",(mb-ma));
+  ma := @CFDF_Metric(Pro);
+  mb := @CFDF_Metric(After);
+  PRINT ("CF/DF  ", ma,"  ", mb,"  ", (mb-ma));
+  ma := @Total_Size(Pro);
+  mb := @Total_Size(After);
+  PRINT ("Size   ", ma,"  ", mb, "  ",(mb-ma));
+  ma := @Struct_Metric(Pro);
+  mb := @Struct_Metric(After);
+  PRINT ("Struct ", ma, "  ",mb, "  ",(mb-ma));
+  SKIP
+  ENDVAR
+END;
+
+VAR< prog := < >, inifilename := "transf.ini", 
+       filename:="", file := "", inifile:= "",
+       Argv := @Argv 
+>:
+C:"First one is the script name that is being executed";
+Argv := TAIL(Argv);
+
+IF Argv = < > THEN 
+               PRINT("no arguments passed; using ",inifilename);
+               IF @File_Exists?(inifilename) THEN
+                       inifile := @Open_Input_File(inifilename);
+                       filename := @Read_Line(inifile);
+                       WHILE NOT @EOF?(filename) DO
+                               PRINT("");
+                               @Process_File(filename);
+                               filename := @Read_Line(inifile)
+                       OD;
+                       @Close_Input_Port(inifile);
+               ELSE
+                       PRINT("ini file (",inifilename,") not found.",
+                       " it should contain a list of filenames to be converted");
+                       PRINT("OR you can give command line arguments to be processed");
+               FI
+ELSE
+       FOR arg IN Argv DO
+               @Process_File(arg);
+       OD
+FI
+ENDVAR
\ No newline at end of file