refactoring

1 files changed, 10 insertions, 21 deletions

diff --git a/kernel/src/filesystem/open_file_table.cpp b/kernel/src/filesystem/open_file_table.cpp
index e47d229..4d52d36 100644
--- a/kernel/src/filesystem/open_file_table.cpp
+++ b/kernel/src/filesystem/open_file_table.cpp
@@ -9,6 +9,7 @@
 #include <algorithm>
 #include <cstddef>
 #include <optional>
+#include <unistd.h>
 
 namespace
 {
@@ -37,7 +38,7 @@ namespace kernel::filesystem
     return *global_open_file_table;
   }
 
-  auto open_file_table::add_file(kstd::shared_ptr<open_file_descriptor> const & file_descriptor) -> int
+  auto open_file_table::add_file(kstd::shared_ptr<open_file_descriptor> const & file_descriptor) -> ssize_t
   {
     if (!file_descriptor)
     {
@@ -48,43 +49,31 @@ namespace kernel::filesystem
     if (it != m_open_files.end())
     {
       *it = file_descriptor;
-      return static_cast<int>(it - m_open_files.begin());
+      return it - m_open_files.begin();
     }
 
     m_open_files.push_back(file_descriptor);
-    return static_cast<int>(m_open_files.size() - 1);
+    return m_open_files.size() - 1;
   }
 
-  auto open_file_table::get_file(int fd) const -> kstd::shared_ptr<open_file_descriptor>
+  auto open_file_table::file(size_t fd) const -> kstd::shared_ptr<open_file_descriptor>
   {
-    if (fd < 0)
+    if (fd >= m_open_files.size())
     {
       return nullptr;
     }
 
-    auto const index = static_cast<size_t>(fd);
-    if (index >= m_open_files.size())
-    {
-      return nullptr;
-    }
-
-    return m_open_files.at(index);
+    return m_open_files.at(fd);
   }
 
-  auto open_file_table::remove_file(int fd) -> int
+  auto open_file_table::remove_file(size_t fd) -> ssize_t
   {
-    if (fd < 0)
-    {
-      return -1;
-    }
-
-    auto const index = static_cast<size_t>(fd);
-    if (index >= m_open_files.size())
+    if (fd >= m_open_files.size())
     {
       return -1;
     }
 
-    m_open_files.at(index) = nullptr;
+    m_open_files.at(fd) = nullptr;
     return 0;
   }
 }  // namespace kernel::filesystem