h5_file.cc

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// -*- C++ -*-
#include "h5_file.h"
#include <fstream>
 
namespace CNORXZ
{
    namespace hdf5
    {
    File::File(const String& fname, bool _ro) :
        Group(fname, nullptr),
        mRo(_ro)
    {}
 
    File::~File()
    {
        this->close();
    }
 
    ContentType File::type() const
    {
        return ContentType::FILE;
    }
    
    bool File::ro() const
    {
        return mRo;
    }
    
    File& File::open()
    {
        if(isOpen()){
        return *this;
        }
        Int ex = this->exists();
        const String fn = this->filename();
        CXZ_ASSERT( ishdf5(), "tried to open non-h5 file '" << fn << "'" );
        if(mRo){
        CXZ_ASSERT( ex == 1, "could not open file as read-only: '"
                << fn << "' does not exist'");
        mId = H5Fopen( fn.c_str(), H5F_ACC_RDONLY, H5P_DEFAULT );
        }
        else {
        if(ex == 1){
            mId = H5Fopen( fn.c_str(), H5F_ACC_RDWR, H5P_DEFAULT );
        }
        else {
            mId = H5Fcreate( fn.c_str(), H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT );
        }
        }
        CXZ_ASSERT( mId > 0, "error while opening file '" << fn << "'" );
        this->mkCont();
        return *this;
    }
    
    File& File::close()
    {
        if(mCont.range() != nullptr){
        for(auto& x: mCont){
            if(x != nullptr){
            x->close();
            }
        }
        }
        if(mId != 0){
        H5Fclose(mId);
        }
        mId = 0;
        return *this;
    }
    
    String File::path() const
    {
        return "";
    }
    
    String File::filename() const
    {
        return name();
    }
 
    bool File::exists() const
    {
        bool ex = false;
        std::ifstream fs(this->filename().c_str(), std::ios_base::binary);
        if(fs.good()){
        ex = true; // file exists
        }
        fs.close();
        return ex;
    }
 
    bool File::ishdf5() const
    {
        if(exists()){
        if(H5Fis_hdf5(this->filename().c_str()) <= 0){
            return false;
        }
        }
        return true; // a non-existing file can be created in hdf5 format
    }
    }
}