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Jeff Epler 9632360caa
Use a macro to compute the size of arrays at compile time (#18044)
* Add ARRAY_SIZE and CEILING utility macros

* Apply a coccinelle patch to use ARRAY_SIZE

* fix up some straggling items

* Fix 'make test:secure'

* Enhance ARRAY_SIZE macro to reject acting on pointers

The previous definition would not produce a diagnostic for
```
int *p;
size_t num_elem = ARRAY_SIZE(p)
```
but the new one will.

* explicitly get definition of ARRAY_SIZE

* Convert to ARRAY_SIZE when const is involved

The following spatch finds additional instances where the array is
const and the division is by the size of the type, not the size of
the first element:
```
@ rule5a using "empty.iso" @
type T;
const T[] E;
@@

- (sizeof(E)/sizeof(T))
+ ARRAY_SIZE(E)

@ rule6a using "empty.iso" @
type T;
const T[] E;
@@

- sizeof(E)/sizeof(T)
+ ARRAY_SIZE(E)
```

* New instances of ARRAY_SIZE added since initial spatch run

* Use `ARRAY_SIZE` in docs (found by grep)

* Manually use ARRAY_SIZE

hs_set is expected to be the same size as uint16_t, though it's made
of two 8-bit integers

* Just like char, sizeof(uint8_t) is guaranteed to be 1

This is at least true on any plausible system where qmk is actually used.

Per my understanding it's universally true, assuming that uint8_t exists:
https://stackoverflow.com/questions/48655310/can-i-assume-that-sizeofuint8-t-1

* Run qmk-format on core C files touched in this branch

Co-authored-by: Stefan Kerkmann <karlk90@pm.me>
3 years ago
..
bluetooth Format code according to conventions (#16322) 4 years ago
eeprom Fixup SPI. (#17534) 3 years ago
flash Fixup compilation of printf-like functions with uint32_t args. (#17904) 3 years ago
gpio Pca9505/6 driver (#17333) 3 years ago
haptic Use a macro to compute the size of arrays at compile time (#18044) 3 years ago
lcd Format code according to conventions (#16686) 4 years ago
led Add led matrix support for CKLED2001 (#17643) 3 years ago
oled Format code according to conventions (#16322) 4 years ago
painter Format code according to conventions (#17869) 3 years ago
ps2 Improve PS/2 mouse performance (#17111) 4 years ago
sensors Use a macro to compute the size of arrays at compile time (#18044) 3 years ago
wear_leveling Wear-leveling EEPROM drivers: `embedded_flash`, `spi_flash`, `legacy` (#17376) 3 years ago
serial.h [Core] Split ChibiOS usart split driver in protocol and hardware driver part (#16669) 4 years ago
usb2422.c Format code according to conventions (#16322) 4 years ago
usb2422.h Initial USB2422 driver (#14835) 4 years ago
usbpd.h Add support for analog USBPD on STM32G4xx. (#11824) 5 years ago
ws2812.h Format code according to conventions (#16322) 4 years ago