From 0319d8ad7f5f6d69867f8aea08ee6a142879ea27 Mon Sep 17 00:00:00 2001
From: Jonathan Bradley <jcb@pikum.xyz>
Date: Wed, 13 Dec 2023 15:48:25 -0500
Subject: add PkeArray

---
 CMakeLists.txt |  1 +
 src/array.hpp  | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 src/array.hpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7ed862b..f4317ba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,7 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -pthread")
 
 set(PKE_SOURCE_FILES
 	src/macros.hpp
+	src/array.hpp
 	src/camera.hpp
 	src/camera.cpp
 	src/components.hpp
diff --git a/src/array.hpp b/src/array.hpp
new file mode 100644
index 0000000..1fd6266
--- /dev/null
+++ b/src/array.hpp
@@ -0,0 +1,54 @@
+#ifndef PKE_ARRAY_HPP
+#define PKE_ARRAY_HPP
+
+#include "macros.hpp"
+#include "memory-type-defs.hpp"
+
+#include <cstdint>
+
+struct PkeArray_Base {
+	uint32_t next = 0;
+	uint32_t reserved = 0;
+};
+
+template<typename D>
+struct PkeArray : PkeArray_Base {
+	using PkeArray_Base::next;
+	using PkeArray_Base::reserved;
+	D *data = nullptr;
+};
+
+template<typename D>
+void PkeArray_HardReset(PkeArray_Base *arrIn) {
+	auto *arr = static_cast<PkeArray<D> *>(arrIn);
+	arr->next = 0;
+	arr->reserved = 0;
+	arr->data = CAFE_BABE(D);
+}
+
+template<typename D>
+inline void PkeArray_Add(PkeArray_Base *arrIn, const D &val, MemBucket *bkt = nullptr) {
+	auto *arr = static_cast<PkeArray<D> *>(arrIn);
+	if (arr->reserved == arr->next) {
+		long originalCount = arr->reserved;
+		long diff = 0;
+		if (arr->reserved == 0) {
+			diff = 16;
+			arr->reserved = 16;
+		} else {
+			arr->reserved *= 2.5;
+			diff = arr->reserved - originalCount;
+		}
+		auto *newData = Pke_New<D>(arr->reserved, bkt);
+		memset(newData + (sizeof(D) * originalCount), 0xFF, sizeof(D) * diff);
+		if (arr->data != nullptr && arr->data != CAFE_BABE(D)) {
+			memcpy(newData, arr->data, sizeof(D) * originalCount);
+			Pke_Delete<D>(arr->data, originalCount, bkt);
+		}
+		arr->data = newData;
+	}
+	arr->data[arr->next++] = val;
+}
+
+
+#endif /* PKE_ARRAY_HPP */
-- 
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