mirror of
https://github.com/triqs/dft_tools
synced 2024-12-26 06:14:14 +01:00
4af1afbdaf
- For users : only change is :
H5::H5File in apps. to be replaced by triqs::h5::file, same API.
- using only the C API because :
- it is cleaner, better documented, more examples.
- it is the native hdf5 interface.
- simplify the installation e.g. on mac. Indeed, hdf5 is
usually installed without C++ interface, which is optional.
E.g. EPD et al., brew by default.
Also the infamous mpi+ hdf5_cpp bug, for which we have no clean solution.
- clean the notion of parent of a group. Not needed, better iterate function in C LT API.
- modified doc : no need for C++ bindings any more.
- modified cmake to avoid requiring CPP bindings.
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
#include "./file.hpp"
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#include "./base.hpp"
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namespace triqs {
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namespace h5 {
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file::file(const char* name, unsigned flags) {
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if ((flags == H5F_ACC_RDWR) || (flags == H5F_ACC_RDONLY)) {
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id = H5Fopen(name, flags, H5P_DEFAULT);
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if (id < 0) TRIQS_RUNTIME_ERROR << "HDF5 : can not open file" << name;
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return;
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}
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if (flags == H5F_ACC_TRUNC) {
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id = H5Fcreate(name, flags, H5P_DEFAULT, H5P_DEFAULT);
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if (id < 0) TRIQS_RUNTIME_ERROR << "HDF5 : can not create file " << name;
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return;
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}
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if (flags == H5F_ACC_EXCL) {
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id = H5Fcreate(name, flags, H5P_DEFAULT, H5P_DEFAULT);
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if (id < 0) TRIQS_RUNTIME_ERROR << "HDF5 : can not create file " << name << ". Does it exists ?";
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return;
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}
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TRIQS_RUNTIME_ERROR << "HDF5 file opening : flag not recognized";
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}
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//---------------------------------------------
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file::file (hid_t id_) : h5_object(h5_object(id_)){}
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file::file(h5_object obj) : h5_object(std::move(obj)) {
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if (!H5Iis_valid(this->id)) TRIQS_RUNTIME_ERROR << "Invalid input in h5::file constructor from id";
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if (H5Iget_type(this->id) != H5I_FILE) TRIQS_RUNTIME_ERROR << "h5::file constructor must take the id of a file ";
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}
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//---------------------------------------------
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std::string file::name() const { // same function as for group
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char _n[1];
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ssize_t size = H5Fget_name(id, _n, 1); // first call, get the size only
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std::vector<char> buf(size + 1, 0x00);
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H5Fget_name(id, buf.data(), 1); // now get the name
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std::string res = "";
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res.append(&(buf.front()));
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return res;
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}
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}
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}
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