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core: add CRTP base class to unit types

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The goal here is to add general addition and scalar multiplication
functions to the unit types.

Thereto, we need a CRTP
(https://en.wikipedia.org/wiki/Curiously_recurring_template_pattern)
base class.

However, this breaks compound initialization, so we have to use
named initializers:
	weight_t { 2000 } -> weight_t { .grams = 2000 }
The good thing is that this is exactly how these classes were
supposed to be used: make the unit explicit!

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2024-09-01 21:48:31 +02:00 • committed by bstoeger
parent 696ba61eef
commit 12ca172a9e
26 changed files with 127 additions and 138 deletions
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4
core/sample.h
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@ -12,7 +12,7 @@ struct sample // BASE TYPE BYTES UNITS RANGE
{ // --------- ----- ----- ----- -----------
duration_t time; // int32_t 4 seconds (0-34 yrs) elapsed dive time up to this sample
duration_t stoptime; // int32_t 4 seconds (0-34 yrs) time duration of next deco stop
duration_t ndl = { -1 }; // int32_t 4 seconds (-1 no val, 0-34 yrs) time duration before no-deco limit
duration_t ndl = { .seconds = -1 };// int32_t 4 seconds (-1 no val, 0-34 yrs) time duration before no-deco limit
duration_t tts; // int32_t 4 seconds (0-34 yrs) time duration to reach the surface
duration_t rbt; // int32_t 4 seconds (0-34 yrs) remaining bottom time
depth_t depth; // int32_t 4 mm (0-2000 km) dive depth of this sample
@ -21,7 +21,7 @@ struct sample // BASE TYPE BYTES UNITS RANGE
pressure_t pressure[MAX_SENSORS]; // int32_t 2x4 mbar (0-2 Mbar) cylinder pressures (main and CCR o2)
o2pressure_t setpoint; // uint16_t 2 mbar (0-65 bar) O2 partial pressure (will be setpoint)
o2pressure_t o2sensor[MAX_O2_SENSORS];// uint16_t 6x2 mbar (0-65 bar) Up to 6 PO2 sensor values (rebreather)
bearing_t bearing = { -1 }; // int16_t 2 degrees (-1 no val, 0-360 deg) compass bearing
bearing_t bearing = { .degrees = -1 };// int16_t 2 degrees (-1 no val, 0-360 deg) compass bearing
int16_t sensor[MAX_SENSORS] = {}; // int16_t 2x2 sensorID (0-16k) ID of cylinder pressure sensor
uint16_t cns = 0; // uint16_t 2 % (0-64k %) cns% accumulated
uint8_t heartbeat = 0; // uint8_t 1 beats/m (0-255) heart rate measurement