From e37026ea3b9d7b121aeb1fd38fe81ab82a1e2e33 Mon Sep 17 00:00:00 2001
From: Kelly Rauchenberger <fefferburbia@gmail.com>
Date: Mon, 1 Feb 2021 09:45:55 -0500
Subject: Fixed bug in LZ77 algo

---
 tools/sprite_dumper/common.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/sprite_dumper/common.h b/tools/sprite_dumper/common.h
index 2aca4fa..d9fb5da 100644
--- a/tools/sprite_dumper/common.h
+++ b/tools/sprite_dumper/common.h
@@ -78,8 +78,11 @@ public:
             int n = ((t >> 12) & 0xF) + 3; // num of bytes to copy
             int o = (t & 0xFFF);
 
-            memcpy(result.data() + bPos, result.data() + bPos - o - 1, n);
-            bPos += n;
+            for (int j=0; j<n; j++) {
+              if (bPos >= length) break;
+              result[bPos] = result[bPos - o - 1];
+              bPos++;
+            }
             break;
           }
           default: break;
-- 
cgit 1.4.1