From bf90905a5ded3995af5677685bc31228d485e64b Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Wed, 8 Apr 2026 18:52:11 +0200
Subject: add test block_device

---
 kernel/src/test_support/devices/block_device.cpp | 58 ++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 kernel/src/test_support/devices/block_device.cpp

(limited to 'kernel/src/test_support')

diff --git a/kernel/src/test_support/devices/block_device.cpp b/kernel/src/test_support/devices/block_device.cpp
new file mode 100644
index 0000000..bce415f
--- /dev/null
+++ b/kernel/src/test_support/devices/block_device.cpp
@@ -0,0 +1,58 @@
+#include "kernel/test_support/devices/block_device.hpp"
+
+#include "kernel/devices/block_device.hpp"
+
+#include <kstd/string>
+#include <kstd/vector>
+
+#include <algorithm>
+#include <cstddef>
+#include <cstdint>
+#include <cstring>
+#include <string.h>
+
+namespace kernel::tests::devices
+{
+  block_device::block_device(size_t major, size_t minor, kstd::string const & name, size_t block_size)
+      : kernel::devices::block_device(major, minor, name, block_size)
+  {}
+
+  auto block_device::init() -> bool
+  {
+    return true;
+  }
+
+  auto block_device::read_block(size_t block_index, void * buffer) const -> void
+  {
+    auto const offset = block_index * block_size();
+    if (offset >= data.size())
+    {
+      kstd::libc::memset(buffer, 0, block_size());
+      return;
+    }
+
+    auto const bytes_to_read = std::min(block_size(), data.size() - offset);
+    kstd::libc::memcpy(buffer, data.data() + offset, bytes_to_read);
+    if (bytes_to_read < block_size())
+    {
+      kstd::libc::memset(static_cast<uint8_t *>(buffer) + bytes_to_read, 0, block_size() - bytes_to_read);
+    }
+  }
+
+  auto block_device::write_block(size_t block_index, void const * buffer) -> void
+  {
+    auto const offset = block_index * block_size();
+    auto const write_end = offset + block_size();
+    if (write_end > data.size())
+    {
+      data.resize(write_end, 0);
+    }
+
+    kstd::libc::memcpy(data.data() + offset, static_cast<uint8_t const *>(buffer), block_size());
+  }
+
+  auto block_device::size() const -> size_t
+  {
+    return data.size();
+  }
+}  // namespace kernel::tests::devices
\ No newline at end of file
-- 
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