1 /* test-gps.c
2 *
3 * Creates ExifEntries for the GPS ifd and initializes them.
4 * Checks for formats and component counts.
5 *
6 * Copyright 2020 Heiko Lewin <hlewin@gmx.de>
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301 USA.
22 *
23 * SPDX-License-Identifier: LGPL-2.0-or-later
24 */
25
26 #include <libexif/exif-utils.h>
27 #include <libexif/exif-data.h>
28
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <stdint.h>
33
34 /*
35 * List of tags to test,
36 */
37 static const uint16_t test_tags [] = {
38 EXIF_TAG_GPS_VERSION_ID,
39 EXIF_TAG_GPS_LATITUDE_REF,
40 EXIF_TAG_GPS_LATITUDE,
41 EXIF_TAG_GPS_LONGITUDE_REF,
42 EXIF_TAG_GPS_LONGITUDE,
43 EXIF_TAG_GPS_ALTITUDE_REF,
44 EXIF_TAG_GPS_ALTITUDE,
45 EXIF_TAG_GPS_TIME_STAMP,
46 EXIF_TAG_GPS_SATELLITES,
47 EXIF_TAG_GPS_STATUS,
48 EXIF_TAG_GPS_MEASURE_MODE,
49 EXIF_TAG_GPS_DOP,
50 EXIF_TAG_GPS_SPEED_REF,
51 EXIF_TAG_GPS_SPEED,
52 EXIF_TAG_GPS_TRACK_REF,
53 EXIF_TAG_GPS_TRACK,
54 EXIF_TAG_GPS_IMG_DIRECTION_REF,
55 EXIF_TAG_GPS_IMG_DIRECTION,
56 EXIF_TAG_GPS_MAP_DATUM,
57 EXIF_TAG_GPS_DEST_LATITUDE_REF,
58 EXIF_TAG_GPS_DEST_LATITUDE,
59 EXIF_TAG_GPS_DEST_LONGITUDE_REF,
60 EXIF_TAG_GPS_DEST_LONGITUDE,
61 EXIF_TAG_GPS_DEST_BEARING_REF,
62 EXIF_TAG_GPS_DEST_BEARING,
63 EXIF_TAG_GPS_DEST_DISTANCE_REF,
64 EXIF_TAG_GPS_DEST_DISTANCE,
65 EXIF_TAG_GPS_PROCESSING_METHOD,
66 EXIF_TAG_GPS_AREA_INFORMATION,
67 EXIF_TAG_GPS_DATE_STAMP,
68 EXIF_TAG_GPS_DIFFERENTIAL,
69 EXIF_TAG_GPS_H_POSITIONING_ERROR,
70 0xFFFFu
71 };
72
73
74 /*
75 * Verify that the entry is properly initialized.
76 */
check_entry_format(ExifEntry * e)77 static int check_entry_format(ExifEntry *e)
78 {
79 if(e->tag > EXIF_TAG_GPS_H_POSITIONING_ERROR) {
80 /* unknown tags should get EXIF_FORMAT_UNDEFINED, no size and no data */
81 if(e->format != EXIF_FORMAT_UNDEFINED || e->size || e->components || e->data) {
82 fprintf(stderr, "check_entry_format: Unknown tag not handled correctly (tag=%x)\n", e->tag);
83 return 1;
84 }
85 return 0;
86 }
87 switch(e->format) {
88 case EXIF_FORMAT_UNDEFINED:
89 case EXIF_FORMAT_ASCII:
90 /* entries with ASCII or UNDEFINED format do not necessarily need to have the component count set.
91 only check here is, if component count is set, the size should match the count */
92 if(e->size != e->components) {
93 fprintf (stderr, "check_entry_format: Entry has bad component count or size (tag=%x)\n", e->tag);
94 return 1;
95 }
96 break;
97
98 default:
99 /* All other formats should have a nonzero component count. */
100 if(!e->components) {
101 fprintf (stderr, "check_entry_format: Entry should have component count set (tag=%x)\n", e->tag);
102 return 1;
103 }
104 return 0;
105 }
106
107 /* If a value is present the size should be set to the right value */
108 if(e->data && e->size != e->components * exif_format_get_size(e->format)) {
109 fprintf (stderr, "check_entry_format: Entry has bad size (tag=%x)\n", e->tag);
110 return 1;
111 }
112 return 0;
113 }
114
115 int
main(void)116 main (void)
117 {
118 size_t i;
119 ExifData *data = NULL;
120 ExifEntry *e = NULL;
121
122 data = exif_data_new ();
123 if (!data) {
124 fprintf (stderr, "Error running exif_data_new()\n");
125 goto ERROR_EXIT;
126 }
127
128 /* Run tests */
129 for (i=0; i < sizeof(test_tags)/sizeof(test_tags[0]); ++i) {
130 e = exif_entry_new ();
131 if (!e) {
132 fprintf (stderr, "Error running exif_entry_new()\n");
133 goto ERROR_EXIT;
134 }
135 exif_content_add_entry(data->ifd[EXIF_IFD_GPS], e);
136 exif_entry_initialize (e, (ExifTag)test_tags[i]);
137 if(check_entry_format(e)) goto ERROR_EXIT;
138 exif_content_remove_entry (data->ifd[EXIF_IFD_GPS], e);
139 exif_entry_unref (e);
140 }
141 exif_data_unref(data);
142 return 0;
143 ERROR_EXIT:
144 exif_entry_unref (e);
145 exif_data_unref (data);
146 exit(EXIT_FAILURE);
147 }
148
149