test-mnote.c

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/* exif-mnote.c
 *
 * Copyright 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 <stdio.h>
#include <stdlib.h>
 
#include <libexif/exif-data.h>
 
static const char *strornull(const char *ptr) {
        if (!ptr)
                return "(none)";
        return ptr;
}
 
static int
test_exif_data (ExifData *d)
{
        unsigned int i, c;
        char v[1024], *p;
        ExifMnoteData *md;
 
        printf("Byte order: %s\n",
                exif_byte_order_get_name (exif_data_get_byte_order (d)));
 
        printf("Parsing maker note...\n");
        md = exif_data_get_mnote_data (d);
        if (!md) {
                fprintf (stderr, "Could not parse maker note!\n");
                exif_data_unref (d);
                return 1;
        }
 
        printf("Increasing ref-count...\n");
        exif_mnote_data_ref (md);
 
        printf("Decreasing ref-count...\n");
        exif_mnote_data_unref (md);
 
        printf("Counting entries...\n");
        c = exif_mnote_data_count (md);
        printf("Found %i entries.\n", c);
        for (i = 0; i < c; i++) {
                printf("Dumping entry number %i...\n", i);
                printf("  Name: '%s'\n",
                                strornull(exif_mnote_data_get_name (md, i)));
                printf("  Title: '%s'\n",
                                strornull(exif_mnote_data_get_title (md, i)));
                printf("  Description: '%s'\n",
                                strornull(exif_mnote_data_get_description (md, i)));
                p = exif_mnote_data_get_value (md, i, v, sizeof (v));
                if (p) { printf("  Value: '%s'\n", v); }
        }
 
        return 0;
}
 
int
main (int argc, char **argv)
{
        ExifData *d;
        unsigned int buf_size;
        unsigned char *buf;
        int r;
 
        if (argc <= 1) {
                fprintf (stderr, "You need to supply a filename!\n");
                return 1;
        }
 
        printf("Loading '%s'...\n", argv[1]);
        d = exif_data_new_from_file (argv[1]);
        if (!d) {
                fprintf (stderr, "Could not load data from '%s'!\n", argv[1]);
                return 1;
        }
        printf("Loaded '%s'.\n", argv[1]);
 
        printf("######### Test 1 #########\n");
        r = test_exif_data (d);
        if (r) return r;
 
        exif_data_save_data (d, &buf, &buf_size);
        exif_data_unref (d);
        d = exif_data_new_from_data (buf, buf_size);
        free (buf);
        if (!d) {
                fprintf (stderr, "Could not load data from buf!\n");
                return 1;
        }
 
        printf ("######### Test 2 #########\n");
        r = test_exif_data (d);
        exif_data_unref (d);
        if (r) return r;
 
        printf ("Test successful!\n");
 
        return 0;
}