SerializableHdf5Reader00.cpp

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 2010 Soeren Sonnenburg
 * Copyright (C) 2010 Berlin Institute of Technology
 */

#include <shogun/lib/config.h>
#ifdef HAVE_HDF5

#include <shogun/io/SerializableHdf5Reader00.h>

using namespace shogun;

SerializableHdf5Reader00::SerializableHdf5Reader00(
    CSerializableHdf5File* file) { m_file = file; }

SerializableHdf5Reader00::~SerializableHdf5Reader00(void) {}

bool
SerializableHdf5Reader00::read_scalar_wrapped(
    const TSGDataType* type, void* param)
{
    CSerializableHdf5File::type_item_t* m
        = m_file->m_stack_type.back();

    switch (type->m_stype) {
    case ST_NONE:
        if (m->y != 0 || m->x != 0) return true;
        break;
    case ST_STRING:
        if (m->y == -1 || m->x == -1) break;

        if (m->sub_y != 0) return true;

        memcpy(param, m->vltype[m->x*m->dims[1] + m->y].p,
               m->vltype[m->x*m->dims[1] + m->y].len
               *type->sizeof_ptype());

        return true;
    case ST_SPARSE:
        if (m->sub_y != 0) return true;
        break;
    }

    hid_t mem_type_id;
    if ((mem_type_id = CSerializableHdf5File::new_stype2hdf5(
             type->m_stype, type->m_ptype)) < 0) return false;

    switch (type->m_stype) {
    case ST_NONE:
        if (H5Dread(m->dset, mem_type_id, H5S_ALL, H5S_ALL,
                    H5P_DEFAULT, param) < 0) return false;
        break;
    case ST_STRING:
        if (H5Dread(m->dset, mem_type_id, H5S_ALL, H5S_ALL,
                    H5P_DEFAULT, m->vltype) < 0) return false;
        break;
    case ST_SPARSE:
        if (H5Dread(m->dset, m->dtype, H5S_ALL, H5S_ALL,
                    H5P_DEFAULT, m->sparse_ptr) < 0) return false;
        break;
    }

    if (H5Tclose(mem_type_id) < 0) return false;

    return true;
}

bool
SerializableHdf5Reader00::read_cont_begin_wrapped(
    const TSGDataType* type, index_t* len_read_y, index_t* len_read_x)
{
    CSerializableHdf5File::type_item_t* m
        = m_file->m_stack_type.back();

    if (type->m_ptype != PT_SGOBJECT) {
        switch (type->m_ctype) {
        case CT_NDARRAY:
            SG_NOTIMPLEMENTED;
        case CT_SCALAR:
            SG_ERROR("read_cont_begin_wrapped(): Implementation error"
                     " during writing Hdf5File (0)!");
            return false;
        case CT_VECTOR: case CT_SGVECTOR: *len_read_y = m->dims[0]; break;
        case CT_MATRIX: case CT_SGMATRIX:
            *len_read_x = m->dims[0]; *len_read_y = m->dims[1];
            break;
        default: return false;
        }

        return true;
    }

    if (!m_file->attr_exists(STR_IS_CONT)) return false;

    string_t ctype_buf, buf;
    type->to_string(ctype_buf, STRING_LEN);
    if (!m_file->attr_read_string(STR_CTYPE_NAME, buf, STRING_LEN))
        return false;
    if (strcmp(ctype_buf, buf) != 0) return false;

    switch (type->m_ctype) {
    case CT_NDARRAY:
        SG_NOTIMPLEMENTED;
    case CT_SCALAR:
        SG_ERROR("read_cont_begin_wrapped(): Implementation error"
                 " during writing Hdf5File (1)!");
        return false;
    case CT_MATRIX: case CT_SGMATRIX:
        if (!m_file->attr_read_scalar(TYPE_INDEX, STR_LENGTH_X,
                                      len_read_x))
            return false;
        /* break;  */
    case CT_VECTOR: case CT_SGVECTOR:
        if (!m_file->attr_read_scalar(TYPE_INDEX, STR_LENGTH_Y,
                                      len_read_y))
            return false;
        break;
    default: return false;
    }

    return true;
}

bool
SerializableHdf5Reader00::read_cont_end_wrapped(
    const TSGDataType* type, index_t len_read_y, index_t len_read_x)
{
    return true;
}

bool
SerializableHdf5Reader00::read_string_begin_wrapped(
    const TSGDataType* type, index_t* length)
{
    CSerializableHdf5File::type_item_t* m
        = m_file->m_stack_type.back();

    if (m->y == 0 && m->x == 0) {
        m->y = -1; m->x = -1;
        read_scalar_wrapped(type, NULL);
        m->y = 0; m->x = 0;
    }

    *length = m->vltype[m->x*m->dims[1] + m->y].len;

    return true;
}

bool
SerializableHdf5Reader00::read_string_end_wrapped(
    const TSGDataType* type, index_t length)
{
    return true;
}

bool
SerializableHdf5Reader00::read_stringentry_begin_wrapped(
    const TSGDataType* type, index_t y)
{
    CSerializableHdf5File::type_item_t* m
        = m_file->m_stack_type.back();

    m->sub_y = y;

    return true;
}

bool
SerializableHdf5Reader00::read_stringentry_end_wrapped(
    const TSGDataType* type, index_t y)
{
    return true;
}

bool
SerializableHdf5Reader00::read_sparse_begin_wrapped(
    const TSGDataType* type, index_t* vec_index,
    index_t* length)
{
    CSerializableHdf5File::type_item_t* m_prev
        = m_file->m_stack_type.back();

    if(!m_file->dspace_select(type->m_ctype, m_prev->y, m_prev->x))
        return false;

    CSerializableHdf5File::type_item_t* m = new CSerializableHdf5File
        ::type_item_t(m_prev->name);
    m_file->m_stack_type.push_back(m);

    /* ************************************************************ */

    if (!m_file->group_open(m->name, STR_GROUP_PREFIX)) return false;
    if (!m_file->attr_exists(STR_IS_SPARSE)) return false;

    string_t name;
    CSerializableHdf5File::index2string(
        name, STRING_LEN, type->m_ctype, m_prev->y, m_prev->x);
    if ((m->dset = H5Dopen2(m_file->m_stack_h5stream.back(), name,
                            H5P_DEFAULT)) < 0)
        return false;

    if ((m->dtype = H5Dget_type(m->dset)) < 0) return false;
    if (!CSerializableHdf5File::isequal_stype2hdf5(
            type->m_stype, type->m_ptype, m->dtype)) return false;

    if ((m->dspace = H5Dget_space(m->dset)) < 0) return false;
    if (H5Sget_simple_extent_ndims(m->dspace) != 1) return false;


    if ((m->rank = H5Sget_simple_extent_dims(m->dspace, m->dims, NULL)
            ) < 0) return false;

    if (H5Sget_simple_extent_type(m->dspace) != H5S_NULL
        && m->rank != 1) return false;

    *length = m->dims[0];

    /* ************************************************************ */

    char* buf = SG_MALLOC(char, CSerializableHdf5File::sizeof_sparsetype());

    hid_t mem_type_id;
    if ((mem_type_id = CSerializableHdf5File::new_sparsetype()) < 0)
        return false;

    hid_t mem_space_id;
    if ((mem_space_id = H5Screate_simple(0, NULL, NULL)) < 0)
        return false;

    if (H5Dread(m_prev->dset, mem_type_id, mem_space_id,
                m_prev->dspace, H5P_DEFAULT, buf) < 0) return false;

    if (H5Sclose(mem_space_id) < 0) return false;
    if (H5Tclose(mem_type_id) < 0) return false;

    *vec_index = *(index_t*) buf;

    delete buf;

    return true;
}

bool
SerializableHdf5Reader00::read_sparse_end_wrapped(
    const TSGDataType* type, index_t* vec_index,
    index_t length)
{
    if (!m_file->group_close()) return false;

    delete m_file->m_stack_type.back();
    m_file->m_stack_type.pop_back();

    return true;
}

bool
SerializableHdf5Reader00::read_sparseentry_begin_wrapped(
    const TSGDataType* type, SGSparseVectorEntry<char>* first_entry,
    index_t* feat_index, index_t y)
{
    CSerializableHdf5File::type_item_t* m
        = m_file->m_stack_type.back();

    m->sparse_ptr = first_entry;
    m->sub_y = y;

    return true;
}

bool
SerializableHdf5Reader00::read_sparseentry_end_wrapped(
    const TSGDataType* type, SGSparseVectorEntry<char>* first_entry,
    index_t* feat_index, index_t y)
{
    return true;
}

bool
SerializableHdf5Reader00::read_item_begin_wrapped(
    const TSGDataType* type, index_t y, index_t x)
{
    CSerializableHdf5File::type_item_t* m
        = m_file->m_stack_type.back();
    m->y = y; m->x = x;

    if (type->m_ptype != PT_SGOBJECT) return true;

    string_t name;
    if (!CSerializableHdf5File::index2string(
            name, STRING_LEN, type->m_ctype, y, x)) return false;
    if (!m_file->group_open(name, "")) return false;

    return true;
}

bool
SerializableHdf5Reader00::read_item_end_wrapped(
    const TSGDataType* type, index_t y, index_t x)
{
    if (type->m_ptype == PT_SGOBJECT)
        if (!m_file->group_close()) return false;

    return true;
}

bool
SerializableHdf5Reader00::read_sgserializable_begin_wrapped(
    const TSGDataType* type, char* sgserializable_name,
    EPrimitiveType* generic)
{
    if (!m_file->attr_exists(STR_IS_SGSERIALIZABLE)) return false;

    if (m_file->attr_exists(STR_IS_NULL)) {
        *sgserializable_name = '\0'; return true;
    }

    if (!m_file->attr_read_string(
            STR_INSTANCE_NAME, sgserializable_name, STRING_LEN))
        return false;

    if (m_file->attr_exists(STR_GENERIC_NAME)) {
        string_t buf;
        if (!m_file->attr_read_string(
                STR_GENERIC_NAME, buf, STRING_LEN)) return false;
        if (!TSGDataType::string_to_ptype(generic, buf))
            return false;
    }

    return true;
}

bool
SerializableHdf5Reader00::read_sgserializable_end_wrapped(
    const TSGDataType* type, const char* sgserializable_name,
    EPrimitiveType generic)
{
    return true;
}

bool
SerializableHdf5Reader00::read_type_begin_wrapped(
    const TSGDataType* type, const char* name, const char* prefix)
{
    CSerializableHdf5File::type_item_t* m = new CSerializableHdf5File
        ::type_item_t(name);
    m_file->m_stack_type.push_back(m);

    if (type->m_ptype == PT_SGOBJECT) {
        if (!m_file->group_open(name, "")) return false;
        return true;
    }

    if ((m->dset = H5Dopen2(m_file->m_stack_h5stream.back(), name,
                            H5P_DEFAULT)) < 0)
        return false;

    if ((m->dtype = H5Dget_type(m->dset)) < 0) return false;
    if (!CSerializableHdf5File::isequal_stype2hdf5(
            type->m_stype, type->m_ptype, m->dtype)) return false;

    if ((m->dspace = H5Dget_space(m->dset)) < 0) return false;

    if (H5Sget_simple_extent_ndims(m->dspace) > 2) return false;
    if ((m->rank = H5Sget_simple_extent_dims(m->dspace, m->dims, NULL)
            ) < 0) return false;

    switch (type->m_ctype) {
    case CT_NDARRAY:
        SG_NOTIMPLEMENTED;
    case CT_SCALAR:
        if (m->rank != 0) return false;
        if (type->m_stype == ST_STRING) m->vltype = SG_MALLOC(hvl_t, 1);
        break;
    case CT_VECTOR: case CT_SGVECTOR:
        if (H5Sget_simple_extent_type(m->dspace) != H5S_NULL
            && m->rank != 1) return false;
        if (type->m_stype == ST_STRING)
            m->vltype = SG_MALLOC(hvl_t, m->dims[0]);
        break;
    case CT_MATRIX: case CT_SGMATRIX:
        if (H5Sget_simple_extent_type(m->dspace) != H5S_NULL
            && m->rank != 2) return false;
        if (type->m_stype == ST_STRING)
            m->vltype = SG_MALLOC(hvl_t, m->dims[0] *m->dims[1]);
        break;
    default: return false;
    }

    return true;
}

bool
SerializableHdf5Reader00::read_type_end_wrapped(
    const TSGDataType* type, const char* name, const char* prefix)
{
    if (type->m_ptype == PT_SGOBJECT)
        if (!m_file->group_close()) return false;

    delete m_file->m_stack_type.back();
    m_file->m_stack_type.pop_back();
    return true;
}

#endif /* HAVE_HDF5  */