readdir.cpp

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#include "filesystem.hpp"
#include "kernel_log.hpp"
#include "kstd_cstring"
#include "spinlock.hpp"
#include "vfs_internal.hpp"
 
namespace vfs {
 
auto ReadDir(File* file, DirEntry* dirent, size_t count) -> Expected<size_t> {
  if (file == nullptr || dirent == nullptr) {
    return std::unexpected(Error(ErrorCode::kInvalidArgument));
  }
 
  LockGuard<SpinLock> guard(GetVfsState().vfs_lock_);
  if (file->inode == nullptr || file->inode->type != FileType::kDirectory) {
    return std::unexpected(Error(ErrorCode::kFsNotADirectory));
  }
 
  if (file->ops == nullptr) {
    return std::unexpected(Error(ErrorCode::kDeviceNotSupported));
  }
 
  return file->ops->ReadDir(file, dirent, count);
}
}  // namespace vfs