InitHEADmain

1 files changed, 45 insertions, 0 deletions

diff --git a/Homework/cs5300/compiler/p5-compiler/submit/ast/Mutable.java b/Homework/cs5300/compiler/p5-compiler/submit/ast/Mutable.java
new file mode 100644
index 0000000..ac9b7ff
--- /dev/null
+++ b/Homework/cs5300/compiler/p5-compiler/submit/ast/Mutable.java
@@ -0,0 +1,45 @@
+/*
+ * Code formatter project
+ * CS 4481
+ */
+package submit.ast;
+
+import submit.MIPSResult;
+import submit.RegisterAllocator;
+import submit.SymbolTable;
+
+/**
+ *
+ * @author edwajohn
+ */
+public class Mutable implements Expression {
+
+  private final String id;
+  private final Expression index;
+
+  public Mutable(String id, Expression index) {
+    this.id = id;
+    this.index = index;
+  }
+
+  @Override
+  public void toCminus(StringBuilder builder, String prefix) {
+    builder.append(id);
+    if (index != null) {
+      builder.append("[");
+      index.toCminus(builder, prefix);
+      builder.append("]");
+    }
+  }
+
+  public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
+                           SymbolTable symbolTable,
+                           RegisterAllocator regAllocator) {
+    String stackReg = regAllocator.getAny();
+
+    code.append(String.format("li %s %d\n", stackReg, symbolTable.offsetOf(id)))
+        .append(String.format("add %s %s $sp\n", stackReg, stackReg));
+
+    return MIPSResult.createAddressResult(stackReg, VarType.INT);
+  }
+}