From 7c52fde1f8f62a9201236dbe64d6d56cb979079d Mon Sep 17 00:00:00 2001
From: Jan Laupetin <jan@laupetin.net>
Date: Sat, 17 Jan 2026 00:15:59 +0000
Subject: [PATCH] fix: crash on writing float44 type due to misaligned memory

* the compiler in release builds optimizes to use movaps
* this opcode requires memory alignment to 16 byte
* the written memory buffer may be misaligned at this position
---
 src/ZoneWriting/Zone/Stream/ZoneOutputStream.h | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/ZoneWriting/Zone/Stream/ZoneOutputStream.h b/src/ZoneWriting/Zone/Stream/ZoneOutputStream.h
index 0a32486e..34d9bcc7 100644
--- a/src/ZoneWriting/Zone/Stream/ZoneOutputStream.h
+++ b/src/ZoneWriting/Zone/Stream/ZoneOutputStream.h
@@ -34,7 +34,9 @@ public:
     [[nodiscard]] ZoneStreamFillWriteAccessor AtOffset(size_t offset) const;
     [[nodiscard]] ZoneOutputOffset Offset() const;
 
-    template<typename T> void Fill(const T& value, const size_t offset) const
+    template<typename T>
+        requires(sizeof(T) <= sizeof(uintptr_t))
+    void Fill(const T& value, const size_t offset) const
     {
         assert(m_block_buffer);
         assert(offset + sizeof(T) <= m_buffer_size);
@@ -42,6 +44,16 @@ public:
         *reinterpret_cast<T*>(static_cast<char*>(m_block_buffer) + offset) = value;
     }
 
+    template<typename T>
+        requires(sizeof(T) > sizeof(uintptr_t))
+    void Fill(const T& value, const size_t offset) const
+    {
+        assert(m_block_buffer);
+        assert(offset + sizeof(T) <= m_buffer_size);
+
+        std::memcpy(static_cast<char*>(m_block_buffer) + offset, &value, sizeof(T));
+    }
+
     template<typename T, size_t S> void FillArray(T (&value)[S], const size_t offset) const
     {
         assert(m_block_buffer);