1 files changed, 41 insertions, 0 deletions
diff --git a/src/data_buffer.h b/src/data_buffer.h
new file mode 100644
index 0000000..bc264d2
--- /dev/null
+++ b/src/data_buffer.h
@@ -0,0 +1,41 @@
+#pragma once
+
+/* SPDX-License-Identifier: Unlicense
+ */
+
+#include "common.h"
+
+#include <cstddef>
+#include <cstdint>
+
+struct DataView {
+    const uint8_t *const buffer{};
+    const size_t size{};
+};
+
+struct DataBuffer {
+    DataBuffer(){};
+    DataBuffer(const DataBuffer&) = delete;
+    constexpr DataBuffer(DataBuffer&& other)
+        : buffer(other.buffer)
+        , buffer_size(other.buffer_size)
+        , occupied_size(other.occupied_size)
+    {
+        other.occupied_size = 0;
+        other.buffer_size = 0;
+        other.buffer = nullptr;
+    };
+    static constexpr size_t kInitialSize = 4 * 1024;
+    uint8_t *buffer{new uint8_t[kInitialSize]};
+    size_t buffer_size{kInitialSize};
+    size_t occupied_size{};
+    void Expand(size_t new_size);
+    constexpr auto View(size_t offset = 0, size_t size = SIZE_MAX) const
+    {
+        if (offset >= occupied_size) {
+            return DataView{};
+        }
+        return DataView{buffer + offset, Min(occupied_size - offset, size)};
+    };
+    ~DataBuffer();
+};