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subsurface/core/datatrak.cpp
Berthold Stoeger ae81b42fe2 core: introduce a few user-defined literals for unit types 
Thise makes initialization of unit types more palatable.

For example:

    surface.time = sample.time - duration_t { .seconds = 20 };
=>  surface.time = sample.time - 20_sec;

    delta_depth.mm = feet_to_mm(1.0); // 1ft
=>  delta_depth = 1_ft;

    get_cylinderid_at_time(..., { .seconds = 20 * 60 + 1 }));
=>  get_cylinderid_at_time(..., 20_min + 1_sec));

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2024-09-11 10:23:07 +02:00

710 lines
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// SPDX-License-Identifier: GPL-2.0
#ifdef __clang__
// Clang has a bug on zero-initialization of C structs.
#pragma clang diagnostic ignored "-Wmissing-field-initializers"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <time.h>
#include "gettext.h"
#include "datatrak.h"
#include "subsurface-string.h"
#include "units.h"
#include "device.h"
#include "file.h"
#include "format.h"
#include "divesite.h"
#include "dive.h"
#include "divelog.h"
#include "errorhelper.h"
#include "tag.h"
static unsigned int two_bytes_to_int(unsigned char x, unsigned char y)
{
return (x << 8) + y;
}
static unsigned long four_bytes_to_long(unsigned char x, unsigned char y, unsigned char z, unsigned char t)
{
return ((long)x << 24) + ((long)y << 16) + ((long)z << 8) + (long)t;
}
static bool bit_set(unsigned char byte, int bit)
{
return byte & (1 << bit);
}
/*
* Datatrak stores the date in days since 01-01-1600, while Subsurface uses
* time_t (seconds since 00:00 01-01-1970). Function subtracts
* (1970 - 1600) * 365,2425 = 135139,725 to our date variable, getting the
* days since Epoch.
*/
static time_t date_time_to_ssrfc(unsigned long date, int time)
{
time_t tmp;
tmp = (date - 135140) * 86400 + time * 60;
return tmp;
}
static unsigned char to_8859(unsigned char char_cp850)
{
static const unsigned char char_8859[46] = { 0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7,
0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5,
0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9,
0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x66,
0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba,
0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1 };
return char_8859[char_cp850 - 0x80];
}
static char *to_utf8(unsigned char *in_string)
{
int outlen, inlen, i = 0, j = 0;
inlen = strlen((char *)in_string);
outlen = inlen * 2 + 1;
char *out_string = (char *)calloc(outlen, 1);
for (i = 0; i < inlen; i++) {
if (in_string[i] < 127) {
out_string[j] = in_string[i];
} else {
if (in_string[i] > 127 && in_string[i] <= 173)
in_string[i] = to_8859(in_string[i]);
out_string[j] = (in_string[i] >> 6) | 0xC0;
j++;
out_string[j] = (in_string[i] & 0x3F) | 0x80;
}
j++;
}
out_string[j + 1] = '\0';
return out_string;
}
/*
* Reads the header of a datatrak buffer and returns the number of
* dives; zero on error (meaning this isn't a datatrak file).
* All other info in the header is useless for Subsurface.
*/
static int read_file_header(unsigned char *buffer)
{
int n = 0;
if (two_bytes_to_int(buffer[0], buffer[1]) == 0xA100)
n = two_bytes_to_int(buffer[7], buffer[6]);
return n;
}
/*
* Fills a device_data_t structure based on the info from g_models table, using
* the dc's model number as start point.
* Returns libdc's equivalent model number (also from g_models) or zero if
* this a manual dive.
*/
static int dtrak_prepare_data(int model, device_data_t &dev_data)
{
dc_descriptor_t *d = NULL;
int i = 0;
while (model != g_models[i].model_num && g_models[i].model_num != 0xEE)
i++;
dev_data.model = g_models[i].name;
dev_data.vendor.clear();
for (const char *s = g_models[i].name; isalpha(*s); ++s)
dev_data.vendor += *s;
dev_data.product = strchr(g_models[i].name, ' ') + 1;
d = get_descriptor(g_models[i].type, g_models[i].libdc_num);
if (d)
dev_data.descriptor = d;
else
return 0;
return g_models[i].libdc_num;
}
/*
* Return a default name for a tank based on it's size.
* Just get the first in the user's list for given size.
* Reaching the end of the list means there is no tank of this size.
*/
static std::string cyl_type_by_size(int size)
{
auto it = std::find_if(tank_info_table.begin(), tank_info_table.end(),
[size] (const tank_info &info) { return info.ml == size; });
return it != tank_info_table.end() ? it->name : std::string();
}
/*
* Reads the size of a datatrak profile from actual position in buffer *ptr,
* zero padds it with a faked header and inserts the model number for
* libdivecomputer parsing. Puts the completed buffer in a pre-allocated
* compl_buffer, and returns status.
*/
static dc_status_t dt_libdc_buffer(unsigned char *ptr, int prf_length, int dc_model, unsigned char *compl_buffer)
{
if (compl_buffer == NULL)
return DC_STATUS_NOMEMORY;
compl_buffer[3] = (unsigned char) dc_model;
memcpy(compl_buffer + 18, ptr, prf_length);
return DC_STATUS_SUCCESS;
}
/*
* Parses a mem buffer extracting its data and filling a subsurface's dive structure.
* Returns a pointer to last position in buffer, or NULL on failure.
*/
static char *dt_dive_parser(unsigned char *runner, struct dive *dt_dive, struct divelog *log, char *maxbuf)
{
int rc, profile_length, libdc_model;
unsigned char *tmp_string1 = NULL,
*locality = NULL,
*dive_point = NULL,
*compl_buffer,
*membuf = runner;
unsigned char tmp_1byte;
unsigned int tmp_2bytes;
unsigned long tmp_4bytes;
std::string tmp_notes_str;
char is_nitrox = 0, is_O2 = 0, is_SCR = 0;
device_data_t devdata;
devdata.log = log;
/*
* Parse byte to byte till next dive entry
*/
while (membuf[0] != 0xA0 || membuf[1] != 0x00) {
JUMP(membuf, 1);
}
JUMP(membuf, 2);
/*
* Begin parsing
* First, Date of dive, 4 bytes
*/
read_bytes(4);
/*
* Next, Time in minutes since 00:00
*/
read_bytes(2);
dt_dive->dcs[0].when = dt_dive->when = (timestamp_t)date_time_to_ssrfc(tmp_4bytes, tmp_2bytes);
/*
* Now, Locality, 1st byte is long of string, rest is string
*/
read_bytes(1);
read_string(locality);
/*
* Next, Dive point, defined as Locality
*/
read_bytes(1);
read_string(dive_point);
/*
* Subsurface only have a location variable, so we have to merge DTrak's
* Locality and Dive points.
*/
{
std::string buffer2 = std::string((char *)locality) + " " + (char *)dive_point;
struct dive_site *ds = log->sites.get_by_name(buffer2);
if (!ds)
ds = log->sites.create(buffer2);
ds->add_dive(dt_dive);
}
free(locality);
locality = NULL;
free(dive_point);
/*
* Altitude. Don't exist in Subsurface, the equivalent would be
* surface air pressure which can, be calculated from altitude.
* As dtrak registers altitude intervals, we, arbitrarily, choose
* the lower altitude/pressure equivalence for each segment. So
*
* Datatrak table * Conversion formula:
* *
* byte = 1 0 - 700 m * P = P0 * exp(-(g * M * h ) / (R * T0))
* byte = 2 700 - 1700m * P0 = sealevel pressure = 101325 Pa
* byte = 3 1700 - 2700 m * g = grav. acceleration = 9,80665 m/s²
* byte = 4 2700 - * m * M = molar mass (dry air) = 0,0289644 Kg/mol
* * h = altitude over sea level (m)
* * R = Universal gas constant = 8,31447 J/(mol*K)
* * T0 = sea level standard temperature = 288,15 K
*/
read_bytes(1);
switch (tmp_1byte) {
case 1:
dt_dive->dcs[0].surface_pressure = 1_atm;
break;
case 2:
dt_dive->dcs[0].surface_pressure = 932_mbar;
break;
case 3:
dt_dive->dcs[0].surface_pressure = 828_mbar;
break;
case 4:
dt_dive->dcs[0].surface_pressure = 735_mbar;
break;
default:
dt_dive->dcs[0].surface_pressure = 1_atm;
}
/*
* Interval (minutes)
*/
read_bytes(2);
if (tmp_2bytes != 0x7FFF)
dt_dive->dcs[0].surfacetime.seconds = (uint32_t) tmp_2bytes * 60;
/*
* Weather, values table, 0 to 6
* Subsurface don't have this record but we can use tags
*/
dt_dive->tags.clear();
read_bytes(1);
switch (tmp_1byte) {
case 1:
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "clear"));
break;
case 2:
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "misty"));
break;
case 3:
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "fog"));
break;
case 4:
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "rain"));
break;
case 5:
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "storm"));
break;
case 6:
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "snow"));
break;
default:
// unknown, do nothing
break;
}
/*
* Air Temperature
*/
read_bytes(2);
if (tmp_2bytes != 0x7FFF)
dt_dive->dcs[0].airtemp.mkelvin = C_to_mkelvin((double)(tmp_2bytes / 100));
/*
* Dive suit, values table, 0 to 6
*/
read_bytes(1);
switch (tmp_1byte) {
case 1:
dt_dive->suit = "No suit";
break;
case 2:
dt_dive->suit = "Shorty";
break;
case 3:
dt_dive->suit = "Combi";
break;
case 4:
dt_dive->suit = "Wet suit";
break;
case 5:
dt_dive->suit = "Semidry suit";
break;
case 6:
dt_dive->suit = "Dry suit";
break;
default:
// unknown, do nothing
break;
}
/*
* Tank, volume size in liter*100. And initialize gasmix to air (default).
* Dtrak doesn't record init and end pressures, but consumed bar, so let's
* init a default pressure of 200 bar.
*/
read_bytes(2);
if (tmp_2bytes != 0x7FFF) {
cylinder_t cyl;
cyl.type.size.mliter = tmp_2bytes * 10;
cyl.type.description = cyl_type_by_size(tmp_2bytes * 10);
cyl.start = 200_bar;
cyl.gasmix.he = 0_percent;
cyl.gasmix.o2 = 21_percent;
cyl.manually_added = true;
dt_dive->cylinders.push_back(std::move(cyl));
}
/*
* Maximum depth, in cm.
*/
read_bytes(2);
if (tmp_2bytes != 0x7FFF)
dt_dive->maxdepth.mm = dt_dive->dcs[0].maxdepth.mm = (int32_t)tmp_2bytes * 10;
/*
* Dive time in minutes.
*/
read_bytes(2);
if (tmp_2bytes != 0x7FFF)
dt_dive->duration.seconds = dt_dive->dcs[0].duration.seconds = (uint32_t)tmp_2bytes * 60;
/*
* Minimum water temperature in C*100. If unknown, set it to 0K which
* is subsurface's value for "unknown"
*/
read_bytes(2);
if (tmp_2bytes != 0x7fff)
dt_dive->watertemp.mkelvin = dt_dive->dcs[0].watertemp.mkelvin = C_to_mkelvin((double)(tmp_2bytes / 100));
else
dt_dive->watertemp = 0_K;
/*
* Air used in bar*100.
*/
read_bytes(2);
if (tmp_2bytes != 0x7FFF && dt_dive->cylinders.size() > 0)
dt_dive->get_cylinder(0)->gas_used.mliter = lrint(dt_dive->get_cylinder(0)->type.size.mliter * (tmp_2bytes / 100.0));
/*
* Dive Type 1 - Bit table. Subsurface don't have this record, but
* will use tags. Bits 0 and 1 are not used. Reuse coincident tags.
*/
read_bytes(1);
if (bit_set(tmp_1byte, 2))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "no stop"));
if (bit_set(tmp_1byte, 3))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "deco"));
if (bit_set(tmp_1byte, 4))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "single ascent"));
if (bit_set(tmp_1byte, 5))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "multiple ascent"));
if (bit_set(tmp_1byte, 6))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "fresh water"));
if (bit_set(tmp_1byte, 7))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "salt water"));
/*
* Dive Type 2 - Bit table, use tags again
*/
read_bytes(1);
if (bit_set(tmp_1byte, 0)) {
taglist_add_tag(dt_dive->tags, "nitrox");
is_nitrox = 1;
}
if (bit_set(tmp_1byte, 1)) {
taglist_add_tag(dt_dive->tags, "rebreather");
is_SCR = 1;
dt_dive->dcs[0].divemode = PSCR;
}
/*
* Dive Activity 1 - Bit table, use tags again
*/
read_bytes(1);
if (bit_set(tmp_1byte, 0))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "sight seeing"));
if (bit_set(tmp_1byte, 1))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "club dive"));
if (bit_set(tmp_1byte, 2))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "instructor"));
if (bit_set(tmp_1byte, 3))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "instruction"));
if (bit_set(tmp_1byte, 4))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "night"));
if (bit_set(tmp_1byte, 5))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "cave"));
if (bit_set(tmp_1byte, 6))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "ice"));
if (bit_set(tmp_1byte, 7))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "search"));
/*
* Dive Activity 2 - Bit table, use tags again
*/
read_bytes(1);
if (bit_set(tmp_1byte, 0))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "wreck"));
if (bit_set(tmp_1byte, 1))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "river"));
if (bit_set(tmp_1byte, 2))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "drift"));
if (bit_set(tmp_1byte, 3))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "photo"));
if (bit_set(tmp_1byte, 4))
taglist_add_tag(dt_dive->tags, translate("gettextFromC", "other"));
/*
* Other activities - String 1st byte = long
* Will put this in dive notes before the true notes
*/
read_bytes(1);
if (tmp_1byte != 0) {
read_string(tmp_string1);
tmp_notes_str= format_string_std("%s: %s\n",
translate("gettextFromC", "Other activities"),
tmp_string1);
free(tmp_string1);
}
/*
* Dive buddies
*/
read_bytes(1);
if (tmp_1byte != 0) {
read_string(tmp_string1);
dt_dive->buddy = (const char *)tmp_string1;
free(tmp_string1);
}
/*
* Dive notes
*/
read_bytes(1);
if (tmp_1byte != 0) {
read_string(tmp_string1);
dt_dive->notes = format_string_std("%s%s:\n%s",
tmp_notes_str.c_str(),
translate("gettextFromC", "Datatrak/Wlog notes"),
tmp_string1);
free(tmp_string1);
}
/*
* Alarms 1 and Alarms2 - Bit tables - Not in Subsurface, we use the profile
*/
JUMP(membuf, 2);
/*
* Dive number (in datatrak, after import user has to renumber)
*/
read_bytes(2);
dt_dive->number = tmp_2bytes;
/*
* Computer timestamp - Useless for Subsurface
*/
JUMP(membuf, 4);
/*
* Model number to check against equivalence with libdivecomputer table.
* The number also defines if the model is nitrox or O2 capable.
*/
read_bytes(1);
switch (tmp_1byte & 0xF0) {
case 0xF0:
is_nitrox = 1;
break;
case 0xA0:
is_O2 = 1;
break;
default:
is_nitrox = 0;
is_O2 = 0;
break;
}
libdc_model = dtrak_prepare_data(tmp_1byte, devdata);
if (!libdc_model)
report_error(translate("gettextFromC", "[Warning] Manual dive # %d\n"), dt_dive->number);
dt_dive->dcs[0].model = devdata.model;
/*
* Air usage, unknown use. Probably allows or deny manually entering gas
* comsumption based on dc model - Useless for Subsurface
* And 6 bytes without known use.
*/
JUMP(membuf, 7);
/*
* Profile data length
*/
read_bytes(2);
profile_length = tmp_2bytes;
/*
* Profile parsing, only if we have a profile and a dc model.
* If just a profile, skip parsing and seek the buffer to the end of dive.
*/
if (profile_length != 0 && libdc_model != 0) {
compl_buffer = (unsigned char *) calloc(18 + profile_length, 1);
rc = dt_libdc_buffer(membuf, profile_length, libdc_model, compl_buffer);
if (rc == DC_STATUS_SUCCESS) {
libdc_buffer_parser(dt_dive, &devdata, compl_buffer, profile_length + 18);
} else {
report_error(translate("gettextFromC", "[Error] Out of memory for dive %d. Abort parsing."), dt_dive->number);
free(compl_buffer);
goto bail;
}
if (is_nitrox && dt_dive->cylinders.size() > 0)
dt_dive->get_cylinder(0)->gasmix.o2.permille =
lrint(membuf[23] & 0x0F ? 20.0 + 2 * (membuf[23] & 0x0F) : 21.0) * 10;
if (is_O2 && dt_dive->cylinders.size() > 0)
dt_dive->get_cylinder(0)->gasmix.o2.permille = membuf[23] * 10;
free(compl_buffer);
}
JUMP(membuf, profile_length);
/*
* Initialize some dive data not supported by Datatrak/WLog
*/
if (!libdc_model)
dt_dive->dcs[0].deviceid = 0;
else
dt_dive->dcs[0].deviceid = 0xffffffff;
if (!is_SCR && dt_dive->cylinders.size() > 0) {
dt_dive->get_cylinder(0)->end.mbar = dt_dive->get_cylinder(0)->start.mbar -
((dt_dive->get_cylinder(0)->gas_used.mliter / dt_dive->get_cylinder(0)->type.size.mliter) * 1000);
}
return (char *)membuf;
bail:
free(locality);
return NULL;
}
/*
* Parses the header of the .add file, returns the number of dives in
* the archive (must be the same than number of dives in .log file).
*/
static int wlog_header_parser (std::string &mem)
{
int tmp;
unsigned char *runner = (unsigned char *) mem.data();
if (!runner)
return -1;
if (!memcmp(runner, "\x52\x02", 2)) {
runner += 8;
tmp = (int) two_bytes_to_int(runner[1], runner[0]);
return tmp;
} else {
fprintf(stderr, "Error, not a Wlog .add file\n");
return -1;
}
}
#define NOTES_LENGTH 256
#define SUIT_LENGTH 26
static void wlog_compl_parser(std::string &wl_mem, struct dive *dt_dive, int dcount)
{
int tmp = 0, offset = 12 + (dcount * 850),
pos_weight = offset + 256,
pos_viz = offset + 258,
pos_tank_init = offset + 266,
pos_suit = offset + 268;
char *wlog_notes = NULL, *wlog_suit = NULL;
unsigned char *runner = (unsigned char *) wl_mem.data();
/*
* Extended notes string. Fixed length 256 bytes. 0 padded if not complete
*/
if (*(runner + offset)) {
char wlog_notes_temp[NOTES_LENGTH + 1];
wlog_notes_temp[NOTES_LENGTH] = 0;
(void)memcpy(wlog_notes_temp, runner + offset, NOTES_LENGTH);
wlog_notes = to_utf8((unsigned char *) wlog_notes_temp);
}
if (wlog_notes)
dt_dive->notes += wlog_notes;
/*
* Weight in Kg * 100
*/
tmp = (int) two_bytes_to_int(runner[pos_weight + 1], runner[pos_weight]);
if (tmp != 0x7fff) {
weightsystem_t ws = { {.grams = tmp * 10}, translate("gettextFromC", "unknown"), false };
dt_dive->weightsystems.push_back(std::move(ws));
}
/*
* 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 = (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);
}
/*
* Tank initial pressure in bar * 100
* If we know initial pressure, rework end pressure.
*/
tmp = (int) two_bytes_to_int(runner[pos_tank_init + 1], runner[pos_tank_init]);
if (tmp != 0x7fff) {
dt_dive->get_cylinder(0)->start.mbar = tmp * 10;
dt_dive->get_cylinder(0)->end.mbar = dt_dive->get_cylinder(0)->start.mbar - lrint(dt_dive->get_cylinder(0)->gas_used.mliter / dt_dive->get_cylinder(0)->type.size.mliter) * 1000;
}
/*
* Dive suit, fixed length of 26 bytes, zero padded if shorter.
* Expected to be preferred by the user if he did the work of setting it.
*/
if (*(runner + pos_suit)) {
char wlog_suit_temp[SUIT_LENGTH + 1];
wlog_suit_temp[SUIT_LENGTH] = 0;
(void)memcpy(wlog_suit_temp, runner + pos_suit, SUIT_LENGTH);
wlog_suit = to_utf8((unsigned char *) wlog_suit_temp);
}
if (wlog_suit)
dt_dive->suit = wlog_suit;
free(wlog_suit);
}
/*
* Main function call from file.c data is allocated (and freed) there.
* If parsing is aborted due to errors, stores correctly parsed dives.
*/
int datatrak_import(std::string &mem, std::string &wl_mem, struct divelog *log)
{
char *runner;
int i = 0, numdives = 0, rc = 0;
char *maxbuf = mem.data() + mem.size();
// Verify fileheader, get number of dives in datatrak divelog, zero on error
numdives = read_file_header((unsigned char *)mem.data());
if (!numdives) {
report_error("%s", translate("gettextFromC", "[Error] File is not a DataTrak file. Aborted"));
goto bail;
}
// Verify WLog .add file, Beginning sequence and Nº dives
if(!wl_mem.empty()) {
int compl_dives_n = wlog_header_parser(wl_mem);
if (compl_dives_n != numdives) {
report_error("ERROR: Not the same number of dives in .log %d and .add file %d.\nWill not parse .add file", numdives , compl_dives_n);
wl_mem.clear();
}
}
// Point to the expected begining of 1st. dive data
runner = mem.data();
JUMP(runner, 12);
// Sequential parsing. Abort if received NULL from dt_dive_parser.
while ((i < numdives) && (runner < maxbuf)) {
auto ptdive = std::make_unique<dive>();
runner = dt_dive_parser((unsigned char *)runner, ptdive.get(), log, maxbuf);
if (!wl_mem.empty())
wlog_compl_parser(wl_mem, ptdive.get(), i);
if (runner == NULL) {
report_error("%s", translate("gettextFromC", "Error: no dive"));
rc = 1;
goto out;
} else {
log->dives.record_dive(std::move(ptdive));
}
i++;
}
out:
log->dives.sort();
return rc;
bail:
return 1;
}
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