From 747f7d92b900d86bfa4d62b037047bbc94543578 Mon Sep 17 00:00:00 2001
From: Musa Mahmood <Musasmahmood@gmail.com>
Date: Fri, 28 Nov 2025 09:39:23 -0500
Subject: [PATCH] Add deserialization code.

---
 lib/Base/Serializer.cpp |  2 +-
 lib/Base/Serializer.h   | 75 +++++++++++++++++++++++++++++++++++++++--
 2 files changed, 74 insertions(+), 3 deletions(-)

diff --git a/lib/Base/Serializer.cpp b/lib/Base/Serializer.cpp
index b2a5c7d..e77a68a 100644
--- a/lib/Base/Serializer.cpp
+++ b/lib/Base/Serializer.cpp
@@ -11,4 +11,4 @@ force_inline void free_serializer (Serializer* serializer) {
   arena_array_free(*serializer);
 }
 
-// #redundant to_view () #note, just call to_view (ArenaArray<T>&)
\ No newline at end of file
+// #redundant to_view () #note, just call to_view (ArenaArray<T>&)
diff --git a/lib/Base/Serializer.h b/lib/Base/Serializer.h
index 9b91154..0e3c242 100644
--- a/lib/Base/Serializer.h
+++ b/lib/Base/Serializer.h
@@ -7,7 +7,7 @@ force_inline void free_serializer (Serializer* serializer);
 // force_inline ArrayView<u8> to_view (Serializer* serializer); #redundant, just call to_view (ArenaArray<T>&)
 
 template <typename T> force_inline void Add (Serializer* serializer, T item) {
-  T* current_point = &serializer->data[serializer->count];
+  u8* current_point = &serializer->data[serializer->count];
   s64 final_count = serializer->allocated + sizeof(T);
   
   if (serializer->allocated < final_count) {
@@ -20,7 +20,7 @@ template <typename T> force_inline void Add (Serializer* serializer, T item) {
 }
 
 template <typename T> force_inline void AddArray_NoSize (Serializer* serializer, ArrayView<T> view) {
-  T* current_point = &serializer->data[serializer->count];
+  u8* current_point = &serializer->data[serializer->count];
   s64 final_count = serializer->allocated + (view.count * sizeof(T));
   
   if (serializer->allocated < final_count) {
@@ -53,3 +53,74 @@ template <typename T> force_inline void AddString16 (Serializer* serializer, str
   Add(serializer, string_length);
   AddArray_NoSize(serializer, to_view(s));
 }
+
+struct Deserializer { // downcasts to ArrayView<u8>
+  s64 count;
+  u8* data;
+  s64 cursor;
+  
+  Deserializer (ArrayView<u8> view) {
+    count  = view.count;
+    data   = view.data;
+    cursor = 0;
+  }
+};
+
+template <typename T> force_inline void Read (Deserializer* ds, T* item) {
+  u8* current_point = &ds->data[ds->cursor];
+  
+  memcpy(item, current_point, sizeof(T));
+  
+  ds->cursor += sizeof(T);
+}
+
+template <typename T> force_inline void ReadArrayView (Deserializer* ds, ArrayView<T>& view, s64 view_count) {
+  view.count = view_count;
+  view.data  = &ds->data[ds->cursor];
+  
+  ds->cursor += (view_count * sizeof(T));
+}
+
+// Here array should be allocated and have a non-zero count!
+template <typename T> force_inline void ReadArray (Deserializer* ds, ArrayView<T> view) {
+  u8* current_point = &ds->data[ds->cursor];
+  memcpy(view.data, current_point, view.count * sizeof(T));
+  
+  ds->cursor += view.count * sizeof(T);
+}
+
+template <typename T> force_inline ArrayView<T> ReadSizedArray (Deserializer* ds) { // #allocates
+  ArrayView<T> array;
+  
+  Read(ds, &array.count);
+  array.data = NewArray<T>(array.count, false);
+  ReadArray(ds, array);
+  
+  return array;
+}
+
+force_inline void ReadStringView (Deserializer* ds, string& sv, s64 view_count) {
+  sv.count = view_count;
+  sv.data  = &ds->data[ds->cursor];
+  
+  ds->cursor += view_count;
+}
+
+force_inline void ReadString (Deserializer* ds, string& s) { // #no_alloc
+  Read(ds, &s.count);
+  ReadStringView(ds, s, s.count);
+}
+
+force_inline void ReadString32 (Deserializer* ds, string& s) { // #no_alloc
+  u32 str_len = 0;
+  Read(ds, &str_len);
+  ReadStringView(ds, s, (s64)str_len);
+}
+
+force_inline void ReadString16 (Deserializer* ds, string& s) { // #no_alloc
+  u16 str_len = 0;
+  Read(ds, &str_len);
+  ReadStringView(ds, s, (s64)str_len);
+}
+
+// ReadString_MakeCopy...