kammce’s gists

kammce / constexpr-constuctor.cpp

Last active November 8, 2018 15:39

Demonstrates that C++ constexpr constructors do not appear in symbol tables if their objects are defined globally even at optimization level 0.

	// Using g++ (Ubuntu 7.3.0-27ubuntu1~18.04) 7.3.0
	// Notice: that I am using optimization level 0 here.
	//
	// To compile:
	// g++ -g3 -O0 -std=c++17 -o constexpr-constuctor.exe constexpr-constuctor.cpp
	//
	// To dump disassembly along with symbol table:
	// objdump --disassemble --all-headers --source --demangle --wide constexpr-constuctor.exe > constexpr-constuctor.asm
	//
	// To dump contents of .data section:

kammce / source_location_dummy.cpp

Last active March 8, 2020 17:02

source_location_dummy


	#include <cstdint>

	namespace std::experimental
	{
	class source_location
	{
	public:
	constexpr const char * file_name() const { return ""; }
	constexpr const char * function_name() const { return ""; }

kammce / pll_constants_calculator.cpp

Created April 5, 2020 04:54

PLL Constants Calculator

	#include <cstdio>
	#include <cstdint>
	#include <cinttypes>

	struct PllSettings_t
	{
	uint32_t multiplier;
	uint32_t feedback_divider;
	uint32_t output_divider;

kammce / FixedAllocator.hpp

Created December 6, 2020 17:50

Fixed size stack based allocator for std::containers. Removing this from SJSU-Dev2 but wanted to preserve it here for those who may want to use it. This allocator will be replaced with std::pmr going forward.

	#pragma once

	#include <cstdint>
	#include <cstdlib>

	#include "utility/log.hpp"

	namespace sjsu
	{
	/// Arena class is a memory management class that takes an external buffer and

kammce / MockGpio.hpp

Created December 8, 2020 15:22

Partial implementation of a mock peripheral for SJSU. This was used in test to verify if using a hand written mock was faster than FakeIt (24 seconds for small test). It was, but only by 1s.

	namespace sjsu
	{
	/// Mock Gpio for usage in testing
	class MockGpio : public sjsu::Gpio
	{
	public:
	// Return values
	std::deque<bool> read_;
	std::deque<std::variant<Direction, State, std::pair<InterruptCallback, Edge>>>
	captures_;

kammce / picolibc_attempt_notes.cpp

Created July 3, 2021 16:58

Getting picolibc to work


	struct _reent r = {0, (FILE ) 0, (FILE ) 1, (FILE *) 0};
	struct _reent *_impure_ptr = &r;

	extern "C" void __cxa_pure_virtual()
	{
	// put your error handling here
	}

	extern "C" void __cxa_atexit() {}

kammce / xstdbitset.cpp

Last active August 6, 2021 14:28

[Benchmark] C-style multibit insert vs C++ bitset

	#include <bitset>
	#include <cinttypes>
	#include <cstdio>
	#include <limits>
	#include <type_traits>

	namespace xstd {

	struct bitrange {
	uint32_t position;

kammce / example_xbitset.cpp

Last active August 8, 2021 16:40

	#include <bitset>
	#include <cinttypes>
	#include <cstdio>
	#include <limits>
	#include <type_traits>

	namespace xstd {

	struct bitrange {
	uint32_t position;

kammce / std-style-gpio.cpp

Created August 11, 2021 22:29

	#include <cinttypes>
	#include <cstdio>
	#include <functional>

	namespace embed {

	/// An empty settings structure used to indicate that a module or interface does
	/// not have generic settings.
	struct empty_settings {};

kammce / test_badge.json

Last active May 28, 2022 22:17

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	"schemaVersion": 1,
	"label": "",
	"logoSvg": "<svg version='1.1' id='Capa_1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 310.797 310.797' style='enable-background:new 0 0 310.797 310.797;' xml:space='preserve'><g><path d='M208.859,27.307L208.8,11.308L189.311,0l-87.893,51.407l0.11,19.635L63.697,93.104l0.073,47.457l-18.592,11.161 l-0.155,101.334l20.214,11.833l12.422-7.502l18.173,11.395v30.12l20.075,11.895l87.333-50.921l-0.053-21.302l45.583-26.463v-38.133 l17.004-10.152V60.551L208.859,27.307z M187.302,33.392l6.559-3.846l0.048,23.674l-6.607,3.86V33.392z M158.816,50.059l6.558-3.836 l0.049,23.653l-6.606,3.86V50.059z M129.173,67.389l6.558-3.844l0.049,23.68l-6.606,3.871V67.389z M101.529,87.725l-0.049,13.891 l20.164,11.813l87.158-51.046l0.095-17.363l23.033,14.225l-107.389,63.021L83.517,98.361L101.529,87.725z M73.18,167.153 l20.375-12.225l-0.105,7.768l-20.383,12.171L73.18,167.153z M72.604,203.263l0.018-1.205l20.374-12.225l-0.105,7.768l-20.382,12.17 L

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