Ensure enough data available while disassembling

src/iw5/stdafx.hpp

@@ -1,38 +1,39 @@
-// Copyright 2021 xensik. All rights reserved.
-//
-// Use of this source code is governed by a GNU GPLv3 license
-// that can be found in the LICENSE file.
-
-#pragma once
-
-// Warnings
-#ifdef _WIN32
-#pragma warning(disable:4244)
-#pragma warning(disable:4267)
-#pragma warning(disable:4005)
-#pragma warning(disable:4065)
-#define _CRT_SECURE_NO_WARNINGS
-#endif
-
-// C/C++
-#include <regex>
-#include <string>
-#include <vector>
-#include <memory>
-#include <algorithm>
-#include <filesystem>
-#include <functional>
-#include <stdexcept>
-#include <map>
-#include <stack>
-#include <array>
-#include <iostream>
-#include <sstream>
-#include <fstream>
-#include <unordered_map>
-#include <stdio.h>
-
-// Ext
-using namespace std::literals;
-
-#include "xsk/iw5.hpp"
+// Copyright 2021 xensik. All rights reserved.
+//
+// Use of this source code is governed by a GNU GPLv3 license
+// that can be found in the LICENSE file.
+
+#pragma once
+
+// Warnings
+#ifdef _WIN32
+#pragma warning(disable:4244)
+#pragma warning(disable:4267)
+#pragma warning(disable:4005)
+#pragma warning(disable:4065)
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+
+// C/C++
+#include <regex>
+#include <string>
+#include <vector>
+#include <memory>
+#include <algorithm>
+#include <filesystem>
+#include <functional>
+#include <stdexcept>
+#include <map>
+#include <stack>
+#include <array>
+#include <iostream>
+#include <sstream>
+#include <fstream>
+#include <unordered_map>
+#include <stdio.h>
+#include <cassert>
+
+// Ext
+using namespace std::literals;
+
+#include "xsk/iw5.hpp"

src/iw5/xsk/disassembler.cpp

@@ -71,6 +71,7 @@ void disassembler::dissasemble_function(const gsc::function_ptr& func)
         func->instructions.push_back(std::make_unique<gsc::instruction>());
         auto& inst = func->instructions.back();
         inst->index = static_cast<std::uint32_t>(script_->pos());
+        assert(script_->is_avail());
         inst->opcode = script_->read<std::uint8_t>();
         inst->size = opcode_size(inst->opcode);