// SPDX-License-Identifier: MIT /* * uemis.c * * UEMIS SDA file importer * AUTHOR: Dirk Hohndel - Copyright 2011 * * Licensed under the MIT license. */ #include #include #include #include "gettext.h" #include "uemis.h" #include "divesite.h" #include "errorhelper.h" #include "sample.h" #include #include /* * following code is based on code found in at base64.sourceforge.net/b64.c * AUTHOR: Bob Trower 08/04/01 * COPYRIGHT: Copyright (c) Trantor Standard Systems Inc., 2001 * NOTE: This source code may be used as you wish, subject to * the MIT license. */ /* * Translation Table to decode (created by Bob Trower) */ static const char cd64[] = "|$$$}rstuvwxyz{$$$$$$$>?@ABCDEFGHIJKLMNOPQRSTUVW$$$$$$XYZ[\\]^_`abcdefghijklmnopq"; /* * decodeblock -- decode 4 '6-bit' characters into 3 8-bit binary bytes */ static void decodeblock(unsigned char in[4], unsigned char out[3]) { out[0] = (unsigned char)(in[0] << 2 | in[1] >> 4); out[1] = (unsigned char)(in[1] << 4 | in[2] >> 2); out[2] = (unsigned char)(((in[2] << 6) & 0xc0) | in[3]); } /* * decode a base64 encoded stream discarding padding, line breaks and noise */ static void decode(uint8_t *inbuf, uint8_t *outbuf, int inbuf_len) { uint8_t in[4], out[3], v; int i, len, indx_in = 0, indx_out = 0; while (indx_in < inbuf_len) { for (len = 0, i = 0; i < 4 && (indx_in < inbuf_len); i++) { v = 0; while ((indx_in < inbuf_len) && v == 0) { v = inbuf[indx_in++]; v = ((v < 43 || v > 122) ? 0 : cd64[v - 43]); if (v) v = ((v == '$') ? 0 : v - 61); } if (indx_in < inbuf_len) { len++; if (v) in[i] = (v - 1); } else in[i] = 0; } if (len) { decodeblock(in, out); for (i = 0; i < len - 1; i++) outbuf[indx_out++] = out[i]; } } } /* end code from Bob Trower */ /* * convert the base64 data blog */ static int uemis_convert_base64(char *base64, uint8_t **data) { int len, datalen; len = strlen(base64); datalen = (len / 4 + 1) * 3; if (datalen < 0x123 + 0x25) /* less than header + 1 sample??? */ report_info("suspiciously short data block %d", datalen); *data = malloc(datalen); if (!*data) { fprintf(stderr, "Out of memory\n"); return 0; } decode((unsigned char *)base64, *data, len); if (memcmp(*data, "Dive\01\00\00", 7)) report_info("Missing Dive100 header"); return datalen; } struct uemis_helper { uint32_t diveid; int lbs; int divespot; struct dive_site *dive_site; struct uemis_helper *next; }; static struct uemis_helper *uemis_helper = NULL; static struct uemis_helper *uemis_get_helper(uint32_t diveid) { struct uemis_helper **php = &uemis_helper; struct uemis_helper *hp = *php; while (hp) { if (hp->diveid == diveid) return hp; if (hp->next) { hp = hp->next; continue; } php = &hp->next; break; } hp = *php = calloc(1, sizeof(struct uemis_helper)); hp->diveid = diveid; hp->next = NULL; return hp; } static void uemis_weight_unit(int diveid, int lbs) { struct uemis_helper *hp = uemis_get_helper(diveid); if (hp) hp->lbs = lbs; } int uemis_get_weight_unit(uint32_t diveid) { struct uemis_helper *hp = uemis_helper; while (hp) { if (hp->diveid == diveid) return hp->lbs; hp = hp->next; } /* odd - we should have found this; default to kg */ return 0; } void uemis_mark_divelocation(int diveid, int divespot, struct dive_site *ds) { struct uemis_helper *hp = uemis_get_helper(diveid); hp->divespot = divespot; hp->dive_site = ds; } /* support finding a dive spot based on the diveid */ int uemis_get_divespot_id_by_diveid(uint32_t diveid) { struct uemis_helper *hp = uemis_helper; while (hp) { if (hp->diveid == diveid) return hp->divespot; hp = hp->next; } return -1; } void uemis_set_divelocation(int divespot, char *text, double longitude, double latitude) { struct uemis_helper *hp = uemis_helper; while (hp) { if (hp->divespot == divespot) { struct dive_site *ds = hp->dive_site; if (ds) { ds->name = strdup(text); ds->location = create_location(latitude, longitude); } } hp = hp->next; } } /* Create events from the flag bits and other data in the sample; * These bits basically represent what is displayed on screen at sample time. * Many of these 'warnings' are way hyper-active and seriously clutter the * profile plot - so these are disabled by default * * we mark all the strings for translation, but we store the untranslated * strings and only convert them when displaying them on screen - this way * when we write them to the XML file we'll always have the English strings, * regardless of locale */ static void uemis_event(struct dive *dive, struct divecomputer *dc, struct sample *sample, uemis_sample_t *u_sample) { uint8_t *flags = u_sample->flags; int stopdepth; static int lastndl; if (flags[1] & 0x01) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Safety stop violation")); if (flags[1] & 0x08) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Speed alarm")); #if WANT_CRAZY_WARNINGS if (flags[1] & 0x06) /* both bits 1 and 2 are a warning */ add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Speed warning")); if (flags[1] & 0x10) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "pO₂ green warning")); #endif if (flags[1] & 0x20) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "pO₂ ascend warning")); if (flags[1] & 0x40) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "pO₂ ascend alarm")); /* flags[2] reflects the deco / time bar * flags[3] reflects more display details on deco and pO2 */ if (flags[4] & 0x01) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Tank pressure info")); if (flags[4] & 0x04) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "RGT warning")); if (flags[4] & 0x08) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "RGT alert")); if (flags[4] & 0x40) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Tank change suggested")); if (flags[4] & 0x80) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Depth limit exceeded")); if (flags[5] & 0x01) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Max deco time warning")); if (flags[5] & 0x04) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Dive time info")); if (flags[5] & 0x08) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Dive time alert")); if (flags[5] & 0x10) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Marker")); if (flags[6] & 0x02) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "No tank data")); if (flags[6] & 0x04) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Low battery warning")); if (flags[6] & 0x08) add_event(dc, sample->time.seconds, 0, 0, 0, QT_TRANSLATE_NOOP("gettextFromC", "Low battery alert")); /* flags[7] reflects the little on screen icons that remind of previous * warnings / alerts - not useful for events */ #if UEMIS_DEBUG & 32 int i, j; for (i = 0; i < 8; i++) { printf(" %d: ", 29 + i); for (j = 7; j >= 0; j--) printf("%c", flags[i] & 1 << j ? '1' : '0'); } printf("\n"); #endif /* now add deco / NDL * we don't use events but store this in the sample - that makes much more sense * for the way we display this information * What we know about the encoding so far: * flags[3].bit0 | flags[5].bit1 != 0 ==> in deco * flags[0].bit7 == 1 ==> Safety Stop * otherwise NDL */ stopdepth = rel_mbar_to_depth(u_sample->hold_depth, dive); if ((flags[3] & 1) | (flags[5] & 2)) { /* deco */ sample->in_deco = true; sample->stopdepth.mm = stopdepth; sample->stoptime.seconds = u_sample->hold_time * 60; sample->ndl.seconds = 0; } else if (flags[0] & 128) { /* safety stop - distinguished from deco stop by having * both ndl and stop information */ sample->in_deco = false; sample->stopdepth.mm = stopdepth; sample->stoptime.seconds = u_sample->hold_time * 60; sample->ndl.seconds = lastndl; } else { /* NDL */ sample->in_deco = false; lastndl = sample->ndl.seconds = u_sample->hold_time * 60; sample->stopdepth.mm = 0; sample->stoptime.seconds = 0; } #if UEMIS_DEBUG & 32 printf("%dm:%ds: p_amb_tol:%d surface:%d holdtime:%d holddepth:%d/%d ---> stopdepth:%d stoptime:%d ndl:%d\n", sample->time.seconds / 60, sample->time.seconds % 60, u_sample->p_amb_tol, dive->dc.surface_pressure.mbar, u_sample->hold_time, u_sample->hold_depth, stopdepth, sample->stopdepth.mm, sample->stoptime.seconds, sample->ndl.seconds); #endif } /* * parse uemis base64 data blob into struct dive */ void uemis_parse_divelog_binary(char *base64, void *datap) { int datalen; int i; uint8_t *data; struct sample *sample = NULL; uemis_sample_t *u_sample; struct dive *dive = datap; struct divecomputer *dc = &dive->dc; int template, gasoffset; uint8_t active = 0; datalen = uemis_convert_base64(base64, &data); dive->dc.airtemp.mkelvin = C_to_mkelvin((*(uint16_t *)(data + 45)) / 10.0); dive->dc.surface_pressure.mbar = *(uint16_t *)(data + 43); if (*(uint8_t *)(data + 19)) dive->dc.salinity = SEAWATER_SALINITY; /* avg grams per 10l sea water */ else dive->dc.salinity = FRESHWATER_SALINITY; /* grams per 10l fresh water */ /* this will allow us to find the last dive read so far from this computer */ dc->model = strdup("Uemis Zurich"); dc->deviceid = *(uint32_t *)(data + 9); dc->diveid = *(uint16_t *)(data + 7); /* remember the weight units used in this dive - we may need this later when * parsing the weight */ uemis_weight_unit(dc->diveid, *(uint8_t *)(data + 24)); /* dive template in use: 0 = air 1 = nitrox (B) 2 = nitrox (B+D) 3 = nitrox (B+T+D) uemis cylinder data is insane - it stores seven tank settings in a block and the template tells us which of the four groups of tanks we need to look at */ gasoffset = template = *(uint8_t *)(data + 115); if (template == 3) gasoffset = 4; if (template == 0) template = 1; for (i = 0; i < template; i++) { float volume = *(float *)(data + 116 + 25 * (gasoffset + i)) * 1000.0f; /* uemis always assumes a working pressure of 202.6bar (!?!?) - I first thought * it was 3000psi, but testing against all my dives gets me that strange number. * Still, that's of course completely bogus and shows they don't get how * cylinders are named in non-metric parts of the world... * we store the incorrect working pressure to get the SAC calculations "close" * but the user will have to correct this manually */ cylinder_t *cyl = get_or_create_cylinder(dive, i); cyl->type.size.mliter = lrintf(volume); cyl->type.workingpressure.mbar = 202600; cyl->gasmix.o2.permille = *(uint8_t *)(data + 120 + 25 * (gasoffset + i)) * 10; cyl->gasmix.he.permille = 0; } /* first byte of divelog data is at offset 0x123 */ i = 0x123; u_sample = (uemis_sample_t *)(data + i); while ((i <= datalen) && (data[i] != 0 || data[i + 1] != 0)) { if (u_sample->active_tank != active) { if (u_sample->active_tank >= dive->cylinders.nr) { report_info("got invalid sensor #%d was #%d", u_sample->active_tank, active); } else { active = u_sample->active_tank; add_gas_switch_event(dive, dc, u_sample->dive_time, active); } } sample = prepare_sample(dc); sample->time.seconds = u_sample->dive_time; sample->depth.mm = rel_mbar_to_depth(u_sample->water_pressure, dive); sample->temperature.mkelvin = C_to_mkelvin(u_sample->dive_temperature / 10.0); add_sample_pressure(sample, active, (u_sample->tank_pressure_high * 256 + u_sample->tank_pressure_low) * 10); sample->cns = u_sample->cns; uemis_event(dive, dc, sample, u_sample); finish_sample(dc); i += 0x25; u_sample++; } if (sample) dive->dc.duration.seconds = sample->time.seconds - 1; /* get data from the footer */ char buffer[24]; snprintf(buffer, sizeof(buffer), "%1u.%02u", data[18], data[17]); add_extra_data(dc, "FW Version", buffer); snprintf(buffer, sizeof(buffer), "%08x", *(uint32_t *)(data + 9)); add_extra_data(dc, "Serial", buffer); snprintf(buffer, sizeof(buffer), "%d", *(uint16_t *)(data + i + 35)); add_extra_data(dc, "main battery after dive", buffer); snprintf(buffer, sizeof(buffer), "%0u:%02u", FRACTION(*(uint16_t *)(data + i + 24), 60)); add_extra_data(dc, "no fly time", buffer); snprintf(buffer, sizeof(buffer), "%0u:%02u", FRACTION(*(uint16_t *)(data + i + 26), 60)); add_extra_data(dc, "no dive time", buffer); snprintf(buffer, sizeof(buffer), "%0u:%02u", FRACTION(*(uint16_t *)(data + i + 28), 60)); add_extra_data(dc, "desat time", buffer); snprintf(buffer, sizeof(buffer), "%u", *(uint16_t *)(data + i + 30)); add_extra_data(dc, "allowed altitude", buffer); return; }