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h4fromh5.c

/* Copyright (c) 2005 Massachusetts Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

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

#include <unistd.h>

#include "config.h"
#include "arrayh5.h"
#include "arrayh4.h"
#include "copyright.h"
#include "h5utils.h"

#define CHECK(cond, msg) { if (!(cond)) { fprintf(stderr, "h4fromh5 error: %s\n", msg); exit(EXIT_FAILURE); } }

void usage(FILE *f)
{
     fprintf(f, "Usage: h4fromh5 [options] [<hdf4-files>]\n"
           "Options:\n"
           "         -h : this help message\n"
             "         -V : print version number and copyright\n"
           "         -v : verbose output\n"
           "         -T : transposed output\n"
           "  -o <file> : output to HDF4 file <file>\n"
           "  -d <name> : use dataset <name> in the input file\n"
           "              -- you can also specify a dataset via <file>:<name>\n"
        );
}

int main(int argc, char **argv)
{
     char *h4_fname = NULL;
     char *data_name = NULL;
     extern char *optarg;
     extern int optind;
     int c;
     int ifile;
     int verbose = 0, transpose = 0;

     while ((c = getopt(argc, argv, "hd:vTo:V")) != -1)
        switch (c) {
            case 'h':
               usage(stdout);
               return EXIT_SUCCESS;
            case 'V':
               printf("h4fromh5 " PACKAGE_VERSION " by Steven G. Johnson\n" 
                    COPYRIGHT);
               return EXIT_SUCCESS;
            case 'v':
               verbose = 1;
               break;
            case 'T':
               transpose = 1;
               break;
            case 'd':
               free(data_name);
               data_name = my_strdup(optarg);
               break;            
            case 'o':
               free(h4_fname);
               h4_fname = my_strdup(optarg);
               break;
            default:
               fprintf(stderr, "Invalid argument -%c\n", c);
               usage(stderr);
               return EXIT_FAILURE;
        }
     if (optind == argc) {  /* no parameters left */
        usage(stderr);
        return EXIT_FAILURE;
     }

     if (h4_fname && optind + 1 < argc) {
        fprintf(stderr, "h4fromh5: only one .h5 file can be used with -o\n");
        return EXIT_FAILURE;
     }

     for (ifile = optind; ifile < argc; ++ifile) {
        char *h5_fname, *dname;
        arrayh4 a4;
        int i, err;
        int32 dims_copy[ARRAYH4_MAX_RANK];
        char *cur_h4_fname = h4_fname;
        arrayh5 a;

        h5_fname = split_fname(argv[ifile], &dname);
        if (!dname[0])
               dname = data_name;

        if (!cur_h4_fname)
             cur_h4_fname = replace_suffix(h5_fname, ".h5", ".hdf");

        if (verbose)
             printf("Reading HDF5 input file \"%s\"...\n", h5_fname);
        err = arrayh5_read(&a, h5_fname, dname, NULL, 0, 0, 0, 0);
        CHECK(!err, arrayh5_read_strerror[err]);

        if (transpose)
             arrayh5_transpose(&a);

        CHECK(a.rank <= ARRAYH4_MAX_RANK, "HDF5 rank is too big");
        for (i = 0; i < a.rank; ++i)
             dims_copy[i] = a.dims[i];

        CHECK(arrayh4_create(&a4, DFNT_FLOAT64, a.rank, dims_copy),
            "error allocating HDF4 data");
        
        for (i = 0; i < a.N; ++i)
             a4.p.d[i] = a.data[i];

        if (verbose) {
             double a_min, a_max;
             arrayh5_getrange(a, &a_min, &a_max);
             printf("data ranges from %g to %g.\n", a_min, a_max);
        }
        
        if (verbose) {
             int i;
             printf("Writing size %d", a.dims[0]);
             for (i = 1; i < a.rank; ++i)
                printf("x%d", a.dims[i]);
             printf(" data to %s\n", cur_h4_fname);
        }

        arrayh5_destroy(a);

        arrayh4_write(cur_h4_fname, a4);
        arrayh4_destroy(a4);

        if (h4_fname != cur_h4_fname)
             free(cur_h4_fname);
        free(h5_fname);
     }

     return EXIT_SUCCESS;
}

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