/* This example shows how to read a data field in HDF-EOS5 grid data. */

#include <HE5_HdfEosDef.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv)
{
	hid_t gridfile1;
	hid_t grid1;
	int datafield1rank;
	hsize_t datafield1dimsize[32];
	hid_t datafield1type;
	char datafield1dimname[512];
	char datafield1maxdimname[512];
	float *datafield1data;
	hsize_t i, j, k;

	/* Open 'MLS-Aura_L3DM-Temperature_v02-21-c01_2006d020.he5' using grid API */
	if ((gridfile1 = HE5_GDopen("MLS-Aura_L3DM-Temperature_v02-21-c01_2006d020.he5", H5F_ACC_RDONLY)) == -1) {
		fprintf(stderr, "error: cannot open grid 'MLS-Aura_L3DM-Temperature_v02-21-c01_2006d020.he5'\n");
		return -1;
	}

	/* Open a grid named 'Temperature' */
	if ((grid1 = HE5_GDattach(gridfile1, "Temperature")) == -1) {
		fprintf(stderr, "error: cannot attach to 'Temperature'\n");
		return -1;
	}

	/* Retrieve information about 'L3dmValue' datafield */
	if ((HE5_GDfieldinfo(grid1, "L3dmValue", &datafield1rank, datafield1dimsize, &datafield1type, datafield1dimname, datafield1maxdimname)) == -1) {
		fprintf(stderr, "error: cannot get the field info for 'L3dmValue'\n");
		return -1;
	}
	/* Allocate buffer for 'L3dmValue' */
	if ((datafield1data = malloc(sizeof(float) * 32 * 83 * 90)) == NULL) {
		fprintf(stderr, "error: cannot allocate memory for 'L3dmValue'\n");
		return -1;
	}
	/* Read data from 'L3dmValue' */
	if ((HE5_GDreadfield(grid1, "L3dmValue", NULL, NULL, NULL, datafield1data)) == -1) {
		fprintf(stderr, "error: cannot read field 'L3dmValue'\n");
		return -1;
	}
	/* Dump data from 'L3dmValue' */
	for (i = 0; i < 3; ++i) {
		for (j = 0; j < 8; ++j) {
			for (k = 0; k < 9; ++k) {
				printf("%f ", datafield1data[k + 90 * (j + 83 * i)]);
			}
			printf("\n");
		}
		printf("\n");
	}
	/* Release the buffer for 'L3dmValue' */
	free(datafield1data);

	/* Close the grid named 'Temperature' */
	if ((HE5_GDdetach(grid1)) == -1) {
		fprintf(stderr, "error: cannot detach from 'Temperature'\n");
		return -1;
	}

	/* Close 'MLS-Aura_L3DM-Temperature_v02-21-c01_2006d020.he5' */
	if ((HE5_GDclose(gridfile1)) == -1) {
		fprintf(stderr, "error: cannot close grid 'MLS-Aura_L3DM-Temperature_v02-21-c01_2006d020.he5'\n");
		return -1;
	}

	return 0;
}