Merge branch 'tidy-up-folder-structure' into 'develop-BA-FS26'

rename files to snake_case (temp_device part1 -> renamed to device later, due...

See merge request teachos/kernel!12

1 files changed, 42 insertions, 0 deletions

diff --git a/kernel/src/devices/block_device.cpp b/kernel/src/devices/block_device.cpp
new file mode 100644
index 0000000..d12251b
--- /dev/null
+++ b/kernel/src/devices/block_device.cpp
@@ -0,0 +1,42 @@
+#include "kernel/devices/block_device.hpp"
+
+#include "kapi/system.hpp"
+
+#include "kernel/devices/device.hpp"
+
+#include <cstddef>
+#include <string_view>
+
+namespace devices
+{
+  block_device::block_device(size_t major, size_t minor, std::string_view name, size_t block_size)
+      : device(major, minor, name)
+      , m_block_size(block_size)
+  {
+    if (m_block_size == 0)
+    {
+      kapi::system::panic("[DEVICES] block_device constructed with zero block size.");
+    }
+  }
+
+  auto block_device::calculate_transfer(size_t block_index) const -> transfer_info
+  {
+    size_t const offset = block_index * m_block_size;
+    size_t const limit = size();
+
+    size_t const available = (offset < limit) ? (limit - offset) : 0;
+    size_t const to_transfer = (available < m_block_size) ? available : m_block_size;
+
+    return {offset, to_transfer, m_block_size - to_transfer};
+  }
+
+  auto block_device::block_size() const -> size_t
+  {
+    return m_block_size;
+  }
+
+  auto block_device::capacity() const -> size_t
+  {
+    return size();
+  }
+}  // namespace devices
\ No newline at end of file