From 52a8a00698baf463a9b421a294a403feec6fa483 Mon Sep 17 00:00:00 2001
From: Graham <gpe@openrs2.dev>
Date: Sun, 8 Mar 2020 19:39:35 +0000
Subject: [PATCH] Add OriginalPcTable attribute decoder

---
 .../struct/attr/StructGeneralAttribute.java   |  4 +++
 .../attr/StructOriginalPcTableAttribute.java  | 31 +++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 src/org/jetbrains/java/decompiler/struct/attr/StructOriginalPcTableAttribute.java

diff --git a/src/org/jetbrains/java/decompiler/struct/attr/StructGeneralAttribute.java b/src/org/jetbrains/java/decompiler/struct/attr/StructGeneralAttribute.java
index f421671..02ddbec 100644
--- a/src/org/jetbrains/java/decompiler/struct/attr/StructGeneralAttribute.java
+++ b/src/org/jetbrains/java/decompiler/struct/attr/StructGeneralAttribute.java
@@ -34,6 +34,7 @@ public class StructGeneralAttribute {
   public static final Key<StructGeneralAttribute> ATTRIBUTE_DEPRECATED = new Key<>("Deprecated");
   public static final Key<StructLineNumberTableAttribute> ATTRIBUTE_LINE_NUMBER_TABLE = new Key<>("LineNumberTable");
   public static final Key<StructMethodParametersAttribute> ATTRIBUTE_METHOD_PARAMETERS = new Key<>("MethodParameters");
+  public static final Key<StructOriginalPcTableAttribute> ATTRIBUTE_ORIGINAL_PC_TABLE = new Key<>("OriginalPcTable");
 
   public static class Key<T extends StructGeneralAttribute> {
     private final String name;
@@ -97,6 +98,9 @@ public class StructGeneralAttribute {
     else if (ATTRIBUTE_METHOD_PARAMETERS.getName().equals(name)) {
       attr = new StructMethodParametersAttribute();
     }
+    else if (ATTRIBUTE_ORIGINAL_PC_TABLE.getName().equals(name)) {
+      attr = new StructOriginalPcTableAttribute();
+    }
     else {
       // unsupported attribute
       return null;
diff --git a/src/org/jetbrains/java/decompiler/struct/attr/StructOriginalPcTableAttribute.java b/src/org/jetbrains/java/decompiler/struct/attr/StructOriginalPcTableAttribute.java
new file mode 100644
index 0000000..1c27ef2
--- /dev/null
+++ b/src/org/jetbrains/java/decompiler/struct/attr/StructOriginalPcTableAttribute.java
@@ -0,0 +1,31 @@
+package org.jetbrains.java.decompiler.struct.attr;
+
+import org.jetbrains.java.decompiler.struct.consts.ConstantPool;
+import org.jetbrains.java.decompiler.util.DataInputFullStream;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+public final class StructOriginalPcTableAttribute extends StructGeneralAttribute {
+  private final Map<Integer, Integer> pcs = new HashMap<>();
+
+  @Override
+  public void initContent(DataInputFullStream data, ConstantPool pool) throws IOException {
+    int len = data.readUnsignedShort();
+
+    for (int i = 0; i < len; i++) {
+      int pc = data.readUnsignedShort();
+      int originalPc = data.readUnsignedShort();
+      pcs.put(pc, originalPc);
+    }
+  }
+
+  public boolean hasOriginalPc(int pc) {
+    return pcs.containsKey(pc);
+  }
+
+  public int getOriginalPc(int pc) {
+    return pcs.get(pc);
+  }
+}