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datatrak.c: use two_bytes_to_int() to get little endian values

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And use memcmp() call to avoid conversion + comparison.

Signed-off-by: Salvador Cuñat <salvador.cunat@gmail.com>
This commit is contained in:
Salvador Cuñat 2020-08-29 08:52:54 +02:00 committed by Dirk Hohndel
parent 80ff092533
commit c9c38394c0
1 changed files with 5 additions and 6 deletions
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11
core/datatrak.c
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@ -588,10 +588,9 @@ static int wlog_header_parser (struct memblock *mem)
unsigned char *runner = (unsigned char *) mem->buffer;
if (!runner)
return -1;
tmp = (runner[1] << 8) + runner[0];
if (tmp == 0x0252) {
if (!memcmp(runner, "\x52\x02", 2)) {
runner += 8;
tmp = (runner[1] << 8) + runner[0];
tmp = (int) two_bytes_to_int(runner[1], runner[0]);
return tmp;
} else {
fprintf(stderr, "Error, not a Wlog .add file\n");
@ -631,7 +630,7 @@ static void wlog_compl_parser(struct memblock *wl_mem, struct dive *dt_dive, int
/*
* Weight in Kg * 100
*/
tmp = (runner[pos_weight + 1] << 8) + runner[pos_weight];
tmp = (int) two_bytes_to_int(runner[pos_weight + 1], runner[pos_weight]);
if (tmp != 0x7fff) {
weightsystem_t ws = { {lrint(tmp * 10)}, QT_TRANSLATE_NOOP("gettextFromC", "unknown") };
add_cloned_weightsystem(&dt_dive->weightsystems, ws);
@ -641,7 +640,7 @@ static void wlog_compl_parser(struct memblock *wl_mem, struct dive *dt_dive, int
* Visibility in m * 100. Arbitrarily choosed to be 5 stars if >= 25m and
* then assign a star for each 5 meters, resulting 0 stars if < 5 m
*/
tmp = (runner[pos_viz + 1] << 8) + runner[pos_viz];
tmp = (int) two_bytes_to_int(runner[pos_viz + 1], runner[pos_viz]);
if (tmp != 0x7fff) {
tmp = tmp > 2500 ? 2500 / 100 : tmp / 100;
dt_dive->visibility = (int) floor(tmp / 5);
@ -651,7 +650,7 @@ static void wlog_compl_parser(struct memblock *wl_mem, struct dive *dt_dive, int
* Tank initial pressure in bar * 100
* If we know initial pressure, rework end pressure.
*/
tmp = (runner[pos_tank_init + 1] << 8) + runner[pos_tank_init];
tmp = (int) two_bytes_to_int(runner[pos_tank_init + 1], runner[pos_tank_init]);
if (tmp != 0x7fff) {
get_cylinder(dt_dive, 0)->start.mbar = tmp * 10;
get_cylinder(dt_dive, 0)->end.mbar = get_cylinder(dt_dive, 0)->start.mbar - lrint(get_cylinder(dt_dive, 0)->gas_used.mliter / get_cylinder(dt_dive, 0)->type.size.mliter) * 1000;