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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
..
arm_atsam [Core] Update mpaland/printf to eyalroz/printf fork (#16163) 3 years ago
avr Remove deprecated USBasp and bootloadHID bootloader types (#18195) 3 years ago
chibios Use a macro to compute the size of arrays at compile time (#18044) 3 years ago
test Rework paths for eeprom locations. (#17326) 4 years ago
atomic_util.h Move tmk_core/common/<plat> (#13918) 4 years ago
bootloader.h [Core] Add Reboot keycode to core (#15990) 4 years ago
common.mk Expose API for hardware unique ID (#16869) 4 years ago
eeprom.h Wear-leveling EEPROM drivers: `embedded_flash`, `spi_flash`, `legacy` (#17376) 3 years ago
gpio.h Move tmk_core/common/<plat> (#13918) 4 years ago
hardware_id.h Expose API for hardware unique ID (#16869) 4 years ago
pin_defs.h Redo workaround for pin_def errors on KINETIS (#16620) 4 years ago
progmem.h Remove use of __flash due to LTO issues (#15268) 4 years ago
sleep_led.h Move tmk_core/common/<plat> (#13918) 4 years ago
suspend.c Format code according to conventions (#16322) 4 years ago
suspend.h Remove unused suspend_idle (#16063) 4 years ago
synchronization_util.h [Fix] Fix compilation warning for non-split keebs after #17423 (#17439) 4 years ago
timer.h Format code according to conventions (#16322) 4 years ago
wait.h Move tmk_core/common/<plat> (#13918) 4 years ago