squash all the thingsHEADmain

1 files changed, 61 insertions, 6 deletions

diff --git a/submit/SymbolTable.java b/submit/SymbolTable.java
index 7ca6b27..09251bc 100644
--- a/submit/SymbolTable.java
+++ b/submit/SymbolTable.java
@@ -3,6 +3,7 @@ package submit;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
+import submit.ast.VarType;
 
 /*
  * Code formatter project
@@ -17,14 +18,71 @@ public class SymbolTable {
   private SymbolTable parent;
   private final List<SymbolTable> children;
 
+  private int offset;
+
+  public static int LABEL_IDENTIFIER = 0;
+
+  public static String nextId() {
+    return Integer.toString(SymbolTable.LABEL_IDENTIFIER++);
+  }
+
   public SymbolTable() {
+    offset = 0;
     table = new HashMap<>();
     parent = null;
     children = new ArrayList<>();
+
+    this.addGlobalSymbols();
+  }
+
+  public List<String> symbolNames() { return new ArrayList<>(table.keySet()); }
+
+  public void addGlobalSymbols() {
+    SymbolInfo println = new SymbolInfo("println", null, true);
+    this.addSymbol("println", println);
+  }
+
+  public void addSymbol(String id, SymbolInfo symbol) { table.put(id, symbol); }
+
+  public int addOffset(int n) {
+    offset -= 4 * n;
+    return offset;
+  }
+
+  public int getOffset() { return this.offset; }
+
+  // Add symbols in before and reorder offsets such that symbols in before have
+  // a "higher" offset
+  public void addOtherTableBefore(SymbolTable before) {
+    offset = 0;
+    List<String> thisSymbols = symbolNames();
+
+    for (String id : before.symbolNames()) {
+      SymbolInfo symbol = before.find(id);
+      if (!symbol.isFunction()) {
+        addOffset(1);
+        symbol.setOffset(offset);
+      }
+      addSymbol(id, symbol);
+    }
+
+    for (String id : thisSymbols) {
+      SymbolInfo symbol = table.get(id);
+      if (!symbol.isFunction()) {
+        addOffset(1);
+        table.get(id).setOffset(offset);
+      }
+    }
   }
 
-  public void addSymbol(String id, SymbolInfo symbol) {
-    table.put(id, symbol);
+  public int offsetOf(String id) {
+    if (table.containsKey(id)) {
+      return table.get(id).getOffset();
+    }
+    if (parent != null) {
+      return -parent.getOffset() + parent.offsetOf(id);
+    }
+    return 0; // This shouldn't happen :D
   }
 
   /**
@@ -56,8 +114,5 @@ public class SymbolTable {
     return child;
   }
 
-  public SymbolTable getParent() {
-    return parent;
-  }
-
+  public SymbolTable getParent() { return parent; }
 }