[Kernel] Add support for XFileEndOfFileInformation.

src/xenia/vfs/devices/disc_image_file.h

@@ -30,6 +30,7 @@ class DiscImageFile : public File {
                      size_t byte_offset, size_t* out_bytes_written) override {
     return X_STATUS_ACCESS_DENIED;
   }
+  X_STATUS SetLength(size_t length) override { return X_STATUS_ACCESS_DENIED; }
 
  private:
   DiscImageEntry* entry_;

src/xenia/vfs/devices/host_path_file.cc

@@ -52,5 +52,17 @@ X_STATUS HostPathFile::WriteSync(const void* buffer, size_t buffer_length,
   }
 }
 
+X_STATUS HostPathFile::SetLength(size_t length) {
+  if (!(file_access_ & FileAccess::kFileWriteData)) {
+    return X_STATUS_ACCESS_DENIED;
+  }
+
+  if (file_handle_->SetLength(length)) {
+    return X_STATUS_SUCCESS;
+  } else {
+    return X_STATUS_END_OF_FILE;
+  }
+}
+
 }  // namespace vfs
 }  // namespace xe

src/xenia/vfs/devices/host_path_file.h

@@ -32,6 +32,7 @@ class HostPathFile : public File {
                     size_t* out_bytes_read) override;
   X_STATUS WriteSync(const void* buffer, size_t buffer_length,
                      size_t byte_offset, size_t* out_bytes_written) override;
+  X_STATUS SetLength(size_t length) override;
 
  private:
   std::unique_ptr<xe::filesystem::FileHandle> file_handle_;

src/xenia/vfs/devices/stfs_container_file.h

@@ -32,6 +32,7 @@ class StfsContainerFile : public File {
                      size_t byte_offset, size_t* out_bytes_written) override {
     return X_STATUS_ACCESS_DENIED;
   }
+  X_STATUS SetLength(size_t length) override { return X_STATUS_ACCESS_DENIED; }
 
  private:
   StfsContainerEntry* entry_;

src/xenia/vfs/file.h

@@ -44,6 +44,8 @@ class File {
     return X_STATUS_NOT_IMPLEMENTED;
   }
 
+  virtual X_STATUS SetLength(size_t length) { return X_STATUS_NOT_IMPLEMENTED; }
+
   // xe::filesystem::FileAccess
   uint32_t file_access() const { return file_access_; }
   const Entry* entry() const { return entry_; }