mirror of
https://github.com/triqs/dft_tools
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194 lines
10 KiB
C++
194 lines
10 KiB
C++
/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2011-2013 by O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#ifndef TRIQS_ARRAYS_H5_LOWLEVEL_H
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#define TRIQS_ARRAYS_H5_LOWLEVEL_H
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#include <triqs/arrays/array.hpp>
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#include <triqs/arrays/vector.hpp>
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#include <triqs/h5.hpp>
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#include "../cache.hpp"
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namespace triqs { namespace arrays {
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namespace h5_impl {
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template <typename T, int R> const void * get_array_data_cptr ( array_view<T,R> const & A) { return h5::get_data_ptr(&(A.storage()[0]));}
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template <typename T, int R> const void * get_array_data_cptr ( array<T,R> const & A) { return h5::get_data_ptr(&(A.storage()[0]));}
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//template <typename T, int R> void * get_array_data_ptr ( array_view<T,R> & A) { return h5::get_data_ptr(&(A.storage()[0]));}
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//template <typename T, int R> void * get_array_data_ptr ( array<T,R> & A) { return h5::get_data_ptr(&(A.storage()[0]));}
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template <typename A> ENABLE_IF(is_amv_value_or_view_class<A>) *
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get_array_data_ptr (A & x) { return h5::get_data_ptr(&(x.storage()[0]));}
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// the dataspace corresponding to the array. Contiguous data only...
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template <typename ArrayType >
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H5::DataSpace data_space ( ArrayType const & A) {
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static const unsigned int R = ArrayType::rank;
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mini_vector<hsize_t,R> S;
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mini_vector<std::ptrdiff_t,R> const & S1 ( A.indexmap().strides() );
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for (size_t u=0; u<R ; ++u) {
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if (S1[u]<=0) TRIQS_RUNTIME_ERROR<<" negative strides not permitted in h5";
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S[u] =1;
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}
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if (!A.indexmap().is_contiguous()) TRIQS_RUNTIME_ERROR<<" h5 : internal error : array not contiguous";
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static const bool is_complex = boost::is_complex<typename ArrayType::value_type>::value;
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return h5::dataspace_from_LS<R,is_complex > ( A.indexmap().domain().lengths(),A.indexmap().domain().lengths(), S);
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}
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/******************** resize or check the size ****************************************************/
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template <typename A> ENABLE_IF(is_amv_value_class<A>)
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resize_or_check ( A & a, mini_vector<size_t,A::rank> const & dimsf ) { a.resize( indexmaps::cuboid::domain_t<A::rank>( dimsf)); }
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template <typename A> ENABLE_IF(is_amv_view_class<A>)
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resize_or_check ( A const & a, mini_vector<size_t,A::rank> const & dimsf ) {
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if (a.indexmap().domain().lengths() != dimsf) TRIQS_RUNTIME_ERROR<<"Dimension error : the view can not be resized : "
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<< "\n in file : "<< dimsf.to_string()
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<< "\n in view : "<<a.indexmap().domain().lengths().to_string() ;
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}
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/*********************************** WRITE array ****************************************************************/
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/**
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* \brief Write an array or a view into an hdf5 file
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* \tparam
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* \param f The h5 file or group of type H5::H5File or H5::Group
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* \param name The name of the hdf5 array in the file/group where the stack will be stored
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* \param A The array to be stored
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* \param C_reorder bool If true [default] the data will be stored in C order in the hdf5, hence making a temporary
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* cache of the data to reorder them in memory.
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* If false, the array is stored as it [if you know what you are doing]
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* \exception The HDF5 exceptions will be caught and rethrown as TRIQS_RUNTIME_ERROR (with a full stackstrace, cf triqs doc).
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*/
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template <typename T, int R>
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void write_array (h5::group g, std::string const & name, array_view <T,R> const & A, bool C_reorder = true) {
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static_assert( !std::is_base_of<std::string, T>::value, " Not implemented");// 1d is below
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if (C_reorder) { write_array(g,name, make_const_cache(A).view(),false); return; }
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try {
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H5::DataSet ds = g.create_dataset(name, h5::data_type_file<T>(), data_space(A) );
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ds.write( get_array_data_cptr(A), h5::data_type_memory<T>(), data_space(A) );
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// if complex, to be python compatible, we add the __complex__ attribute
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if (boost::is_complex<T>::value) h5::write_string_attribute(&ds,"__complex__","1");
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}
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TRIQS_ARRAYS_H5_CATCH_EXCEPTION;
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}
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template <typename T, int R>
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void write_array (h5::group g, std::string const & name, array <T,R> const & A, bool C_reorder = true) { write_array(g,name,A(),C_reorder);}
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/*********************************** READ array ****************************************************************/
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/**
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* \brief Read an array or a view from an hdf5 file
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* \tparam ArrayType The type of the array/matrix/vector, etc..
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* \param f The h5 file or group of type H5::H5File or H5::Group
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* \param name The name of the hdf5 array in the file/group where the stack will be stored
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* \param A The array to be stored
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* \param C_reorder bool If true [default] the data will be stored in C order in the hdf5, hence making a temporary
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* cache of the data to reorder them in memory. If false, the array is stored as it [if you know what you are doing]
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* \exception The HDF5 exceptions will be caught and rethrown as TRIQS_RUNTIME_ERROR (with a full stackstrace, cf triqs doc).
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*/
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template <typename ArrayType>
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void read_array (h5::group g, std::string const & name, ArrayType & A, bool C_reorder = true) {
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static_assert( !std::is_base_of<std::string, typename ArrayType::value_type>::value, " Not implemented");// 1d is below
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typedef typename ArrayType::value_type V;
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try {
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H5::DataSet ds = g.open_dataset(name);
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H5::DataSpace dataspace = ds.getSpace();
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static const unsigned int Rank = ArrayType::rank + (boost::is_complex<typename ArrayType::value_type>::value ? 1 : 0);
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int rank = dataspace.getSimpleExtentNdims();
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if (rank != Rank) TRIQS_RUNTIME_ERROR << "triqs::array::h5::read. Rank mismatch : the array has rank = "
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<<Rank<<" while the array stored in the hdf5 file has rank = "<<rank;
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mini_vector<hsize_t,Rank> dims_out;
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//int ndims = dataspace.getSimpleExtentDims( &dims_out[0], NULL);
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dataspace.getSimpleExtentDims( &dims_out[0], NULL);
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mini_vector<size_t,ArrayType::rank > d2; for (size_t u=0; u<ArrayType::rank ; ++u) d2[u] = dims_out[u];
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resize_or_check(A, d2 );
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if (C_reorder) { read_array(g,name, cache<ArrayType,typename ArrayType::non_view_type>(A).view(),false);}
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//if (C_reorder) { read_array(g,name, make_cache(A).view(),false);}
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ds.read( get_array_data_ptr(A), h5::data_type_memory<typename ArrayType::value_type>(), data_space(A) , dataspace );
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}
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TRIQS_ARRAYS_H5_CATCH_EXCEPTION;
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}
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// overload : special treatment for arrays of strings (one dimension only).
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inline void write_array (h5::group f, std::string const & name, vector_view<std::string> const & V) {
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h5::detail::write_1darray_vector_of_string_impl(f,name,V);
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}
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inline void write_array (h5::group f, std::string const & name, array_view<std::string,1> const & V) {
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write_array(f,name,vector_view<std::string>(V));
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}
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inline void read_array (h5::group f, std::string const & name, arrays::vector<std::string> & V) {
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h5::detail::read_1darray_vector_of_string_impl(f,name,V);
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}
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// I can not use the generic code, just because the resize of the array take a shape, not a size_t as std::vector and vector
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// Ok, speed is no issue here...
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inline void read_array (h5::group f, std::string const & name, arrays::array<std::string,1> & V) {
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arrays::vector<std::string> res; read_array(f,name,res); V = res;
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}
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}// namespace h5impl
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//template<typename ArrayType> struct is_amv_value_or_view_class_no_string :
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// boost::mpl::and_<is_amv_value_or_view_class<ArrayType>, boost::mpl::not_<boost::is_base_of<std::string, typename ArrayType::value_type> > > {};
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template<typename A, typename Enable=void> struct has_scalar_or_string_value_type : std::false_type{};
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template<typename A> struct has_scalar_or_string_value_type<A, decltype(nop(std::declval<typename A::value_type>()))> :
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boost::mpl::or_<is_scalar<typename A::value_type>,std::is_base_of<std::string,typename A::value_type>>{};
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template <typename ArrayType>
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TYPE_ENABLE_IFC(std::string,is_amv_value_or_view_class<ArrayType>::value)
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get_triqs_hdf5_data_scheme(ArrayType const&) {
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using triqs::get_triqs_hdf5_data_scheme;// for the basic types, not found by ADL
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std::stringstream fs;
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fs<<"array<"<<get_triqs_hdf5_data_scheme(typename ArrayType::value_type())<<","<<ArrayType::rank<<">";
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return fs.str();
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}
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/**
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* \brief Read an array or a view from an hdf5 file
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* \tparam ArrayType The type of the array/matrix/vector, etc..
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* \param fg The h5 file or group of type H5::H5File or H5::Group
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* \param name The name of the hdf5 array in the file/group where the stack will be stored
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* \param A The array to be stored
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* \exception The HDF5 exceptions will be caught and rethrown as TRIQS_RUNTIME_ERROR (with a full stackstrace, cf triqs doc).
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*/
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template <typename ArrayType>
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//ENABLE_IF(is_amv_value_or_view_class<ArrayType>)
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ENABLE_IFC(is_amv_value_or_view_class<ArrayType>::value && has_scalar_or_string_value_type<ArrayType>::value)
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h5_read (h5::group fg, std::string const & name, ArrayType & A) { h5_impl::read_array(fg,name, A);}
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/**
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* \brief Write an array or a view into an hdf5 file
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* \tparam ArrayType The type of the array/matrix/vector, etc..
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* \param fg The h5 file or group of type H5::H5File or H5::Group
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* \param name The name of the hdf5 array in the file/group where the stack will be stored
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* \param A The array to be stored
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* \exception The HDF5 exceptions will be caught and rethrown as TRIQS_RUNTIME_ERROR (with a full stackstrace, cf triqs doc).
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*/
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template <typename ArrayType>
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//ENABLE_IF(is_amv_value_or_view_class<ArrayType>)
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ENABLE_IFC(is_amv_value_or_view_class<ArrayType>::value && has_scalar_or_string_value_type<ArrayType>::value)
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h5_write (h5::group fg, std::string const & name, ArrayType const & A) { h5_impl::write_array(fg,name, array_view<typename ArrayType::value_type, ArrayType::rank>(A));}
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}}
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#endif
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