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
24 #include <libexif/exif-utils.h>
25 #include <libexif/exif-data.h>
26
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <stdint.h>
31
32 /*
33 * List of tags to test,
34 */
35 const uint16_t test_tags [] = {
36 EXIF_TAG_GPS_VERSION_ID,
37 EXIF_TAG_GPS_LATITUDE_REF,
38 EXIF_TAG_GPS_LATITUDE,
39 EXIF_TAG_GPS_LONGITUDE_REF,
40 EXIF_TAG_GPS_LONGITUDE,
41 EXIF_TAG_GPS_ALTITUDE_REF,
42 EXIF_TAG_GPS_ALTITUDE,
43 EXIF_TAG_GPS_TIME_STAMP,
44 EXIF_TAG_GPS_SATELLITES,
45 EXIF_TAG_GPS_STATUS,
46 EXIF_TAG_GPS_MEASURE_MODE,
47 EXIF_TAG_GPS_DOP,
48 EXIF_TAG_GPS_SPEED_REF,
49 EXIF_TAG_GPS_SPEED,
50 EXIF_TAG_GPS_TRACK_REF,
51 EXIF_TAG_GPS_TRACK,
52 EXIF_TAG_GPS_IMG_DIRECTION_REF,
53 EXIF_TAG_GPS_IMG_DIRECTION,
54 EXIF_TAG_GPS_MAP_DATUM,
55 EXIF_TAG_GPS_DEST_LATITUDE_REF,
56 EXIF_TAG_GPS_DEST_LATITUDE,
57 EXIF_TAG_GPS_DEST_LONGITUDE_REF,
58 EXIF_TAG_GPS_DEST_LONGITUDE,
59 EXIF_TAG_GPS_DEST_BEARING_REF,
60 EXIF_TAG_GPS_DEST_BEARING,
61 EXIF_TAG_GPS_DEST_DISTANCE_REF,
62 EXIF_TAG_GPS_DEST_DISTANCE,
63 EXIF_TAG_GPS_PROCESSING_METHOD,
64 EXIF_TAG_GPS_AREA_INFORMATION,
65 EXIF_TAG_GPS_DATE_STAMP,
66 EXIF_TAG_GPS_DIFFERENTIAL,
67 EXIF_TAG_GPS_H_POSITIONING_ERROR,
68 0xFFFFu
69 };
70
71
72 /*
73 * Verify that the entry is properly initialized.
74 */
check_entry_format(ExifEntry * e)75 static int check_entry_format(ExifEntry *e)
76 {
77 if(e->tag > EXIF_TAG_GPS_H_POSITIONING_ERROR) {
78 /* unknown tags should get EXIF_FORMAT_UNDEFINED, no size and no data */
79 if(e->format != EXIF_FORMAT_UNDEFINED || e->size || e->components || e->data) {
80 fprintf(stderr, "check_entry_format: Unknown tag not handled correctly (tag=%x)\n", e->tag);
81 return 1;
82 }
83 return 0;
84 }
85 switch(e->format) {
86 case EXIF_FORMAT_UNDEFINED:
87 case EXIF_FORMAT_ASCII:
88 /* entries with ASCII or UNDEFINED format do not necessarily need to have the component count set.
89 only check here is, if component count is set, the size should match the count */
90 if(e->size != e->components) {
91 fprintf (stderr, "check_entry_format: Entry has bad component count or size (tag=%x)\n", e->tag);
92 return 1;
93 }
94 break;
95
96 default:
97 /* All other formats should have a nonzero component count. */
98 if(!e->components) {
99 fprintf (stderr, "check_entry_format: Entry should have component count set (tag=%x)\n", e->tag);
100 return 1;
101 }
102 return 0;
103 }
104
105 /* If a value is present the size should be set to the right value */
106 if(e->data && e->size != e->components * exif_format_get_size(e->format)) {
107 fprintf (stderr, "check_entry_format: Entry has bad size (tag=%x)\n", e->tag);
108 return 1;
109 }
110 return 0;
111 }
112
113 int
main()114 main ()
115 {
116 size_t i;
117 ExifData *data = NULL;
118 ExifEntry *e = NULL;
119
120 data = exif_data_new ();
121 if (!data) {
122 fprintf (stderr, "Error running exif_data_new()\n");
123 goto ERROR_EXIT;
124 }
125
126 /* Run tests */
127 for (i=0; i < sizeof(test_tags)/sizeof(test_tags[0]); ++i) {
128 e = exif_entry_new ();
129 if (!e) {
130 fprintf (stderr, "Error running exif_entry_new()\n");
131 goto ERROR_EXIT;
132 }
133 exif_content_add_entry(data->ifd[EXIF_IFD_GPS], e);
134 exif_entry_initialize (e, (ExifTag)test_tags[i]);
135 if(check_entry_format(e)) goto ERROR_EXIT;
136 exif_content_remove_entry (data->ifd[EXIF_IFD_GPS], e);
137 exif_entry_unref (e);
138 }
139 exif_data_unref(data);
140 return 0;
141 ERROR_EXIT:
142 exif_entry_unref (e);
143 exif_data_unref (data);
144 exit(EXIT_FAILURE);
145 }
146
147