Implement HDF5 save dataset IO utility function

include/caffe/util/io.hpp

@@ -15,6 +15,8 @@
 using std::string;
 using ::google::protobuf::Message;
 
+#define HDF5_NUM_DIMS 4
+
 namespace caffe {
 
 void ReadProtoFromTextFile(const char* filename,
@@ -60,6 +62,10 @@ void hdf5_load_nd_dataset(
   hid_t file_id, const char* dataset_name_, int min_dim, int max_dim,
   Blob<Dtype>* blob);
 
+template <typename Dtype>
+void hdf5_save_nd_dataset(
+  const hid_t file_id, const string dataset_name, const Blob<Dtype>& blob);
+
 }  // namespace caffe
 
 #endif   // CAFFE_UTIL_IO_H_

src/caffe/util/io.cpp

@@ -142,4 +142,30 @@ void hdf5_load_nd_dataset<double>(hid_t file_id, const char* dataset_name_,
     file_id, dataset_name_, blob->mutable_cpu_data());
 }
 
+template <>
+void hdf5_save_nd_dataset<float>(
+    const hid_t file_id, const string dataset_name, const Blob<float>& blob) {
+  hsize_t dims[HDF5_NUM_DIMS];
+  dims[0] = blob.num();
+  dims[1] = blob.channels();
+  dims[2] = blob.height();
+  dims[3] = blob.width();
+  herr_t status = H5LTmake_dataset_float(
+      file_id, dataset_name.c_str(), HDF5_NUM_DIMS, dims, blob.cpu_data());
+  CHECK_GE(status, 0) << "Failed to make float dataset " << dataset_name;
+}
+
+template <>
+void hdf5_save_nd_dataset<double>(
+    const hid_t file_id, const string dataset_name, const Blob<double>& blob) {
+  hsize_t dims[HDF5_NUM_DIMS];
+  dims[0] = blob.num();
+  dims[1] = blob.channels();
+  dims[2] = blob.height();
+  dims[3] = blob.width();
+  herr_t status = H5LTmake_dataset_double(
+      file_id, dataset_name.c_str(), HDF5_NUM_DIMS, dims, blob.cpu_data());
+  CHECK_GE(status, 0) << "Failed to make double dataset " << dataset_name;
+}
+
 }  // namespace caffe