test-mem.c

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/* test-mem.c
 *
 * Copyright (c) 2002 Lutz Mueller <lutz@users.sourceforge.net>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details. 
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301  USA.
 *
 * SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
#include <config.h>
 
#include <libexif/exif-data.h>
#include <libexif/exif-ifd.h>
#include <libexif/exif-loader.h>
 
#include <stdio.h>
#include <stdlib.h>
 
int
main (void)
{
        ExifData *ed;
        /* ExifEntry *e; */
        unsigned char *eb, size[2];
        unsigned int ebs;
        ExifLoader *loader;
        unsigned int i;
 
        printf ("Creating EXIF data...\n");
        ed = exif_data_new ();
        if (!ed) {
                fprintf(stderr, "Out of memory\n");
                exit(13);
        }
 
        exif_data_set_data_type (ed, EXIF_DATA_TYPE_UNCOMPRESSED_CHUNKY);
 
        printf ("Fill EXIF data with all necessary entries to follow specs...\n");
        exif_data_fix (ed);
 
        /* Add a dummy thumbnail */
        ed->size = 4;
        ed->data = calloc(1, ed->size);
        if (!ed->data) {
                fprintf(stderr, "Out of memory\n");
                exif_data_unref (ed);
                exit(13);
        }
 
        exif_data_dump (ed);
 
        printf ("Saving EXIF data to memory...\n");
        exif_data_save_data (ed, &eb, &ebs);
        exif_data_unref (ed);
 
        printf ("Writing %i byte(s) EXIF data to loader...\n", ebs);
        loader = exif_loader_new ();
        if (!loader) {
                fprintf(stderr, "Out of memory\n");
                free (eb);
                exit(13);
        }
        size[0] = (unsigned char) ebs;
        size[1] = (unsigned char) (ebs >> 8);
        exif_loader_write (loader, size, 2);
        for (i = 0; i < ebs && exif_loader_write (loader, eb + i, 1); i++);
        printf ("Wrote %i byte(s).\n", i);
        free (eb);
        ed = exif_loader_get_data (loader);
        if (!ed) {
                fprintf(stderr, "Out of memory\n");
                exit(13);
        }
        exif_loader_unref (loader);
        exif_data_dump (ed);
        exif_data_unref (ed);
 
        return 0;
}