1 files changed, 84 insertions, 0 deletions
diff --git a/meshmc/libraries/classparser/src/javaendian.h b/meshmc/libraries/classparser/src/javaendian.h
new file mode 100644
index 0000000000..693df89964
--- /dev/null
+++ b/meshmc/libraries/classparser/src/javaendian.h
@@ -0,0 +1,84 @@
+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include <stdint.h>
+
+/**
+ * Swap bytes between big endian and local number representation
+ */
+namespace util
+{
+#ifdef MULTIMC_BIG_ENDIAN
+	inline uint64_t bigswap(uint64_t x)
+	{
+		return x;
+	}
+
+	inline uint32_t bigswap(uint32_t x)
+	{
+		return x;
+	}
+
+	inline uint16_t bigswap(uint16_t x)
+	{
+		return x;
+	}
+
+#else
+	inline uint64_t bigswap(uint64_t x)
+	{
+		return (x >> 56) | ((x << 40) & 0x00FF000000000000) |
+			   ((x << 24) & 0x0000FF0000000000) |
+			   ((x << 8) & 0x000000FF00000000) |
+			   ((x >> 8) & 0x00000000FF000000) |
+			   ((x >> 24) & 0x0000000000FF0000) |
+			   ((x >> 40) & 0x000000000000FF00) | (x << 56);
+	}
+
+	inline uint32_t bigswap(uint32_t x)
+	{
+		return (x >> 24) | ((x << 8) & 0x00FF0000) | ((x >> 8) & 0x0000FF00) |
+			   (x << 24);
+	}
+
+	inline uint16_t bigswap(uint16_t x)
+	{
+		return (x >> 8) | (x << 8);
+	}
+
+#endif
+
+	inline int64_t bigswap(int64_t x)
+	{
+		return static_cast<int64_t>(bigswap(static_cast<uint64_t>(x)));
+	}
+
+	inline int32_t bigswap(int32_t x)
+	{
+		return static_cast<int32_t>(bigswap(static_cast<uint32_t>(x)));
+	}
+
+	inline int16_t bigswap(int16_t x)
+	{
+		return static_cast<int16_t>(bigswap(static_cast<uint16_t>(x)));
+	}
+} // namespace util