From ba6ab6759e4257e543ca5da4caf2705711e5b3ed Mon Sep 17 00:00:00 2001
From: Tom Willemse
Date: Wed, 12 Jan 2022 22:58:10 -0800
Subject: Chapter 23.2

---
 clox/src/debug.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'clox/src/debug.c')

diff --git a/clox/src/debug.c b/clox/src/debug.c
index 5a3cedc..b3f756a 100644
--- a/clox/src/debug.c
+++ b/clox/src/debug.c
@@ -30,6 +30,14 @@ static int byteInstruction(const char *name, Chunk *chunk, int offset) {
   return offset + 2;
 }
 
+static int jumpInstruction(const char *name, int sign, Chunk *chunk,
+                           int offset) {
+  uint16_t jump = (uint16_t)(chunk->code[offset + 1] << 8);
+  jump |= chunk->code[offset + 2];
+  printf("%-16s %4d -> %d\n", name, offset, offset + 3 + sign * jump);
+  return offset + 3;
+}
+
 int disassembleInstruction(Chunk *chunk, int offset) {
   printf("%04d ", offset);
   if (offset > 0 && chunk->lines[offset] == chunk->lines[offset - 1]) {
@@ -80,6 +88,10 @@ int disassembleInstruction(Chunk *chunk, int offset) {
     return simpleInstruction("OP_NEGATE", offset);
   case OP_PRINT:
     return simpleInstruction("OP_PRINT", offset);
+  case OP_JUMP:
+    return jumpInstruction("OP_JUMP", 1, chunk, offset);
+  case OP_JUMP_IF_FALSE:
+    return jumpInstruction("OP_JUMP_IF_FALSE", 1, chunk, offset);
   case OP_RETURN:
     return simpleInstruction("OP_RETURN", offset);
   default:
-- 
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