refactor - generalise stack operations for easier future changes

diff --git a/src/mjc2wsl.java b/src/mjc2wsl.java
index 388f1ad39b965402297e05535b2a157482c3cd27..87177112908a7923d7a282be0825afdec10b0659 100644 (file)
--- a/src/mjc2wsl.java
+++ b/src/mjc2wsl.java
@@ -271,26 +271,31 @@ public class mjc2wsl{
        public static String createComment(String str, char type) {
                return "C:\"" + type + str.replace("\"", "''") + "\";";
        }
+       
+       // generalised stack operations
+       
+       private String createToStack(String stack, String var){
+                       return stack + " := <" + var + " > ++ " + stack +";";
+       }
 
-       //Expression stack
+       private String createFromStack(String stack, String var){
+                       return var + ":= HEAD("+stack+"); "+stack+" := TAIL("+stack+");";
+       }
+//Expression stack
        
        private String createToEStack(int i) {
-               String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
-               if (genPrintEStackOnChange)
-                       res += "PRINT(\"eStack\",mjvm_estack);";
-               return res;
+               return createToEStack(i+"");
        }
 
        private String createToEStack(String i) {
-               String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
+               String res = createToStack("mjvm_estack", i);
                if (genPrintEStackOnChange)
                        res += "PRINT(\"eStack\",mjvm_estack);";
                return res;
        }
 
        private String createFromEStack(String st) {
-               String res = st
-                               + " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
+               String res = createFromStack("mjvm_estack",st);
                if (genPrintEStackOnChange)
                        res += "PRINT(\"eStack\",mjvm_estack);";
                return res;
@@ -314,15 +319,15 @@ public class mjc2wsl{
        //Method stack
 
        private String createToMStack(int i) {
-               return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
+               return createToMStack(i+"");
        }
 
        private String createToMStack(String i) {
-               return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
+               return createToStack("mjvm_mstack", i);
        }
 
        private String createFromMStack(String st) {
-               return st + " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
+               return createFromStack("mjvm_mstack", st);
        }
 
        private String getRelationFor(int opcode) throws Exception {