简介

直接用c的代码写呢太麻烦，用官网的c++用例写呢还乱码，逼得我只能自己写个类来处理了，要不写的东西太多，c的太繁琐，所以自己封装个类方便调用。

hdf5 封装c++ 类

#ifndef _OPEN_HDF5_
#define _OPEN_HDF5_

#include <iostream>
#include <string>
#include <vector>
#include <typeinfo>
#include "h5Cpp.h"

using namespace std;

struct H5TITLE{
    string name;
    string type;
};

/******** ATTR ********/
class CRattr
{
private:
    hid_t hand_id;
public:
    CRattr(hid_t id){
        hand_id = id;
    };
    ~CRattr(){};
    template <class T>
    shared_ptr<CRattr> attr(string key, T value, int len=1){
        hid_t attr_type, attr_space;
        hsize_t attr_dims[1] = { len };
        char* value2 = new char(len);
        if(typeid(T) == typeid(string) || typeid(T) == typeid(char*)){
            attr_type = H5Tcopy(H5T_C_S1);
            H5Tset_size(attr_type, H5T_VARIABLE);
        }else if(typeid(T) == typeid(int)){
            attr_type = H5T_NATIVE_INT;
        }else if(typeid(T) == typeid(double)){
            attr_type = H5T_NATIVE_DOUBLE;
        }else{
            return NULL;
        }
        attr_space = H5Screate_simple(1, attr_dims, NULL);
        hid_t attr = H5Acreate(hand_id, key.c_str(), attr_type, attr_space, H5P_DEFAULT, H5P_DEFAULT);
        if(typeid(T) == typeid(string) || typeid(T) == typeid(char*)){
            H5Awrite(attr, attr_type, value2);
        }else{
            H5Awrite(attr, attr_type, value);
        }
        shared_ptr<CRattr> tmp = make_shared<CRattr>(hand_id);
        return tmp;
    }
};

/******** DATA ********/
class CRdata
{
private:
    hid_t hand_id;
    string dataset_name;
public:
    CRdata(hid_t id, string name){
        hand_id = id;
        dataset_name = name;
    };
    ~CRdata(){};
    template <class T>
    shared_ptr<CRattr> insert(int len, T* wdata, vector<H5TITLE> &title){
        herr_t status;
        hsize_t dims[1] = { len };
        hid_t memtype, space, dset, strtype = H5Tcopy(H5T_C_S1);
        status = H5Tset_size(strtype, H5T_VARIABLE);
        status = H5Tset_cset(strtype, H5T_CSET_UTF8);
        memtype = H5Tcreate(H5T_COMPOUND, sizeof(T));
        int sizet = 0;
        for (int i = 0; i < title.size(); i++)
        {
            if (title.at(i).type == "string" || title.at(i).type == "char") {
                H5Tinsert(memtype, title.at(i).name.c_str(), sizet, strtype);
            } else if (title.at(i).type == "double") {
                H5Tinsert(memtype, title.at(i).name.c_str(), sizet, H5T_NATIVE_DOUBLE);
            } else if (title.at(i).type == "int") {
                H5Tinsert(memtype, title.at(i).name.c_str(), sizet, H5T_NATIVE_INT);
            }
            sizet += sizeof(char*);
        }
        space = H5Screate_simple(1, dims, NULL);
        // 创建数据集
        dset = H5Dcreate(hand_id, dataset_name.c_str(), memtype, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
        // 插入数据
        status = H5Dwrite(dset, memtype, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata);

        shared_ptr<CRattr> tmp = make_shared<CRattr>(dset);
        return tmp;
    };
    template <class T>
    shared_ptr<CRattr> insertList(int rows, int cols, T* wdata){
        hid_t space, dset;
        hid_t memtype;
        if (typeid(T) == typeid(double)) {
            memtype = H5T_NATIVE_DOUBLE;
        } else if (typeid(T) == typeid(long double)){
            memtype = H5T_NATIVE_LDOUBLE;
        } else {
            memtype = H5T_NATIVE_INT;
        }

        hsize_t dims[] = { rows, cols };
        space = H5Screate_simple(2, dims, NULL);
        // 创建数据集
        dset = H5Dcreate(hand_id, dataset_name.c_str(), memtype, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
        // 插入数据
        herr_t status = H5Dwrite(dset, memtype, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata);
        shared_ptr<CRattr> tmp = make_shared<CRattr>(dset);
        return tmp;
    };
};

/******** GROUP ********/
class CRgroup
{
private:
    hid_t hand_id;
public:
    CRgroup(hid_t id){
        hand_id = id;
    };
    ~CRgroup(){};
    shared_ptr<CRgroup> gopen(string group_name){
        hid_t group_id = H5Gcreate(hand_id, group_name.c_str(), H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
        shared_ptr<CRgroup> tmp = make_shared<CRgroup>(group_id);
        return tmp;
    };
    shared_ptr<CRdata> dataset(string dataset_name){
        shared_ptr<CRdata> tmp = make_shared<CRdata>(hand_id, dataset_name);
        return tmp;
    };
    template <class T>
    shared_ptr<CRattr> attr(string key, T* value, int len = 1){
        shared_ptr<CRattr> tmp = make_shared<CRattr>(hand_id);
        tmp->attr<T>(key, value, len);
        return tmp;
    }
};

/******** FILE ********/
class CRfile
{
private:
    hid_t hand_id;
public:
    CRfile(string file_name){
        hand_id = H5Fcreate(file_name.c_str(), H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    };
    ~CRfile(){};
    shared_ptr<CRgroup> gopen(string group_name){
        shared_ptr<CRgroup> tmp = make_shared<CRgroup>(hand_id);
        return tmp.gopen(group_name);
    };
    shared_ptr<CRdata> dataset(string dataset_name){
        shared_ptr<CRdata> tmp = make_shared<CRdata>(hand_id, dataset_name);
        return tmp;
    };
    hid_t getHand() {
        return hand_id;
    }
};

#endif

封装的使用示例

    struct mtx{
        double x;
        double y;
        string z;
    };
    struct mt{
        double x;
        double y;
        char* z;
    };

    struct mtx mtt1[5];
    for (int i = 0; i < 5; i++)
    {
        mtt1[i].x = i;
        mtt1[i].y = i;
        mtt1[i].z = "test";
    }

    struct mt mtt2[5];
    for (int i = 0; i < 5; i++)
    {
        mtt2[i].x = mtt1[i].x;
        mtt2[i].y = mtt1[i].y;
        mtt2[i].z = (char*)mtt1[i].z.c_str();
    }

    double wdata[4] = {1,2,3,4};
    Rfile test("test.h5");

    struct mt *wdata2 = new struct mt[5];
    vector<H5TITLE> title = {{"X","double"},{"Y","double"},{"Z","char"}};
    for (int i = 0; i < 5; i++)
    {
        wdata2[i].x = mtt1[i].x;
        wdata2[i].y = mtt1[i].y;
        wdata2[i].z = (char*)mtt1[i].z.c_str();
    }
    
    test.gopen("gtest").gopen("gtest2").dataset("dset").insertList<double>(2,2,wdata);
    int value[1] = {1};
    test.dataset("dtest").insert<mt>(5, wdata2, title).attr<int>("Name", value, 1);
    test.gopen("att").attr<int>("test", value, 1).attr<int>("test2", value, 1);

图示