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Use the timezone setting of the dive computer

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The Ratio dive computers with the latest APOS4 firmware support a
timezone setting. Take this timezone into account instead of using the
timezone of the host system.
This commit is contained in:
Jef Driesen 2019-01-16 20:06:17 +01:00
parent e363e5b1fd
commit 2b96b2f52c
1 changed files with 87 additions and 2 deletions
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89
src/divesystem_idive_parser.c
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@ -26,6 +26,8 @@
#include "parser-private.h"
#include "array.h"
#define C_ARRAY_SIZE(array) (sizeof (array) / sizeof *(array))
#define ISINSTANCE(parser) dc_device_isinstance((parser), &divesystem_idive_parser_vtable)
#define IX3M_EASY 0x22
@ -151,13 +153,96 @@ divesystem_idive_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *date
{
divesystem_idive_parser_t *parser = (divesystem_idive_parser_t *) abstract;
static const signed char tz_array[] = {
-12, 0, /* UTC-12 */
-11, 0, /* UTC-11 */
-10, 0, /* UTC-10 */
-9, 30, /* UTC-9:30 */
-9, 0, /* UTC-9 */
-8, 0, /* UTC-8 */
-7, 0, /* UTC-7 */
-6, 0, /* UTC-6 */
-5, 0, /* UTC-5 */
-4, 30, /* UTC-4:30 */
-4, 0, /* UTC-4 */
-3, 30, /* UTC-3:30 */
-3, 0, /* UTC-3 */
-2, 0, /* UTC-2 */
-1, 0, /* UTC-1 */
0, 0, /* UTC */
1, 0, /* UTC+1 */
2, 0, /* UTC+2 */
3, 0, /* UTC+3 */
3, 30, /* UTC+3:30 */
4, 0, /* UTC+4 */
4, 30, /* UTC+4:30 */
5, 0, /* UTC+5 */
5, 30, /* UTC+5:30 */
5, 45, /* UTC+5:45 */
6, 0, /* UTC+6 */
6, 30, /* UTC+6:30 */
7, 0, /* UTC+7 */
8, 0, /* UTC+8 */
8, 45, /* UTC+8:45 */
9, 0, /* UTC+9 */
9, 30, /* UTC+9:30 */
9, 45, /* UTC+9:45 */
10, 0, /* UTC+10 */
10, 30, /* UTC+10:30 */
11, 0, /* UTC+11 */
11, 30, /* UTC+11:30 */
12, 0, /* UTC+12 */
12, 45, /* UTC+12:45 */
13, 0, /* UTC+13 */
13, 45, /* UTC+13:45 */
14, 0 /* UTC+14 */
};
if (abstract->size < parser->headersize)
return DC_STATUS_DATAFORMAT;
dc_ticks_t ticks = array_uint32_le(abstract->data + 7) + EPOCH;
if (!dc_datetime_localtime (datetime, ticks))
return DC_STATUS_DATAFORMAT;
// Detect the APOS4 firmware.
unsigned int firmware = 0;
unsigned int apos4 = 0;
if (parser->model >= IX3M_EASY) {
firmware = array_uint32_le(abstract->data + 0x2A);
apos4 = (firmware / 10000000) >= 4;
} else {
firmware = array_uint32_le(abstract->data + 0x2E);
apos4 = 0;
}
if (apos4) {
// For devices with timezone support, the UTC offset of the
// device is used. The UTC offset is stored as an index in the
// timezone table.
unsigned int tz_idx = abstract->data[48];
if ((tz_idx % 2) != 0 || tz_idx >= C_ARRAY_SIZE(tz_array)) {
ERROR (abstract->context, "Invalid timezone index (%u).", tz_idx);
return DC_STATUS_DATAFORMAT;
}
int timezone = tz_array[tz_idx] * 3600;
if (timezone < 0) {
timezone -= tz_array[tz_idx + 1] * 60;
} else {
timezone += tz_array[tz_idx + 1] * 60;
}
ticks += timezone;
if (!dc_datetime_gmtime (datetime, ticks))
return DC_STATUS_DATAFORMAT;
datetime->timezone = timezone;
} else {
// For devices without timezone support, the current timezone of
// the host system is used.
if (!dc_datetime_localtime (datetime, ticks))
return DC_STATUS_DATAFORMAT;
}
return DC_STATUS_SUCCESS;
}