From b8345246dcc2121bcb6d1515a9341789de20199f Mon Sep 17 00:00:00 2001
From: Dominick Allen <djallen@librehumanitas.org>
Date: Sun, 27 Oct 2024 09:04:05 -0500
Subject: First crack at file objects.

---
 include/fud_memory.hpp | 26 +++++++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

(limited to 'include/fud_memory.hpp')

diff --git a/include/fud_memory.hpp b/include/fud_memory.hpp
index 6ce6312..6f6816f 100644
--- a/include/fud_memory.hpp
+++ b/include/fud_memory.hpp
@@ -73,6 +73,18 @@ constexpr void setMemory(Container<Size>& container, T&& value)
     }
 }
 
+template <typename T>
+constexpr void zeroObject(T& object)
+{
+    static_assert(std::is_standard_layout_v<T>);
+    static_assert(std::is_trivially_copyable_v<T>);
+
+    auto* objPtr = reinterpret_cast<uint8_t*>(&object);
+    for (size_t idx = 0; idx < sizeof(object); ++idx) {
+        objPtr[idx] = 0;
+    }
+}
+
 template <size_t Count, typename T, typename U>
 void copyMem(T& destination, const U& source)
 {
@@ -80,11 +92,16 @@ void copyMem(T& destination, const U& source)
     static_assert(Count <= sizeof(T));
     static_assert(std::is_standard_layout_v<T>);
     static_assert(std::is_standard_layout_v<U>);
+    static_assert(std::is_trivially_copyable_v<T>);
+    static_assert(std::is_trivially_copyable_v<U>);
+
+    // NOLINTBEGIN(cppcoreguidelines-pro-type-reinterpret-cast)
+    auto* destPtr = reinterpret_cast<char*>(&destination);
+    const auto* srcPtr = reinterpret_cast<const char*>(&source);
+    // NOLINTEND(cppcoreguidelines-pro-type-reinterpret-cast)
 
     for (size_t idx = 0; idx < Count; ++idx) {
-        // NOLINTBEGIN(cppcoreguidelines-pro-type-reinterpret-cast)
-        reinterpret_cast<char*>(&destination)[idx] = reinterpret_cast<const char*>(&source)[idx];
-        // NOLINTEND(cppcoreguidelines-pro-type-reinterpret-cast)
+        destPtr[idx] = srcPtr[idx];
     }
 }
 
@@ -126,8 +143,7 @@ int compareMem(const T& lhs, U&& rhs)
     int difference = 0;
     for (size_t idx = 0; idx < Count; ++idx) {
         // NOLINTBEGIN(cppcoreguidelines-pro-type-reinterpret-cast)
-        difference = reinterpret_cast<const uint8_t*>(&lhs)[idx] -
-            reinterpret_cast<const uint8_t*>(&uRhs)[idx];
+        difference = reinterpret_cast<const uint8_t*>(&lhs)[idx] - reinterpret_cast<const uint8_t*>(&uRhs)[idx];
         // NOLINTEND(cppcoreguidelines-pro-type-reinterpret-cast)
         if (difference != 0) {
             break;
-- 
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