david7482’s gists

david7482 / ssm-agent.json

Created November 17, 2018 17:04

	{
	"Version": "2012-10-17",
	"Statement": [
	{
	"Effect": "Allow",
	"Action": [
	"ssm:DescribeAssociation",
	"ssm:GetDeployablePatchSnapshotForInstance",
	"ssm:GetDocument",
	"ssm:GetManifest",

david7482 / packer-build.log

Last active September 30, 2018 15:40

	amazon-ebs output will be in this color.

	==> amazon-ebs: Prevalidating AMI Name: ubuntu-18.04-root-encryption-2018-09-29T14-40-02Z
	amazon-ebs: Found Image ID: ami-0ac019f4fcb7cb7e6
	==> amazon-ebs: Creating temporary keypair: packer_5baf8ec2-f229-8c17-afd9-76b501a75f67
	==> amazon-ebs: Creating temporary security group for this instance: packer_5baf8ec5-e1ba-73cb-8dca-dfec2c8ccfc2
	==> amazon-ebs: Authorizing access to port 22 from 0.0.0.0/0 in the temporary security group...
	==> amazon-ebs: Launching a source AWS instance...
	==> amazon-ebs: Adding tags to source instance
	amazon-ebs: Adding tag: "Name": "Packer Builder"

david7482 / ec2-ami.json

Last active September 30, 2018 15:16

	{
	"variables": {
	"ami-name": "ubuntu-18.04-{{ isotime }}"
	},
	"builders": [
	{
	"type": "amazon-ebs",
	"ami_name": "{{ user `ami-name` \| clean_ami_name }}",
	"region": "us-east-1",
	"source_ami_filter": {

david7482 / packer-structure.json

Last active September 30, 2018 14:46

david7482 / install-packer.sh

Created September 29, 2018 18:46

	wget -O packer.zip https://releases.hashicorp.com/packer/1.3.1/packer_1.3.1_linux_amd64.zip
	sudo unzip -d /usr/local/bin packer.zip

david7482 / cfileptr.cpp

Created March 7, 2016 13:55 — forked from armornick/cfileptr.cpp

Using a C pointer (stdio) with a unique_ptr (C++11) (code from: https://codereview.stackexchange.com/questions/4679/shared-ptr-and-file-for-wrapping-cstdio-update-also-dlfcn-h)

	#include <memory>
	#include <cstdio>

	/////////////////////////////////////////////////////////////////////////////

	typedef std::unique_ptr<std::FILE, int ()(std::FILE )> unique_file_ptr;
	typedef std::shared_ptr<std::FILE> shared_file_ptr;

	static shared_file_ptr make_shared_file(const char * filename, const char * flags)
	{

david7482 / mp4v2_reader.c

Created September 22, 2015 12:30

MP4V2 library test

	#include <stdio.h>

	#include "mp4.h"


	char *mp4FileName = "\\Storage Card\\TestVectors\\Downloaded\\[Ani]Conan-01.mp4";

	int WINAPI WinMain( HINSTANCE hInstance,
	HINSTANCE hPrevInstance,
	LPTSTR lpCmdLine,

david7482 / get_base_file_name_compile_time.cpp

Created July 22, 2015 18:27

Get base file name at compile time

	// Extract base file name at compile time. E.g., "bar.cc" when __FILE__ == "/foo/bar.cc"
	static constexpr const char* BASE_FILE(const char* dp, const char* p) {
	return p == '\0' ? dp : p == '/' ? BASE_FILE(p + 1, p + 1) : BASE_FILE(dp, p + 1);
	}
	static constexpr const char* BASE_FILE(const char* s) { return BASE_FILE(s,s); }

david7482 / test_hash_func.cpp

Created July 17, 2015 17:16

Simple program to test hash function

	/* Nick Mudge 24 February 2008 */
	// http://nickmudge.info/?post=84

	#include <stdio.h>
	#include <stdlib.h>
	#include <time.h>
	#include <string.h>
	#define SIZE 50000

	void make_random_strings(unsigned char *strings[]);

david7482 / C++11_string_swtich.cpp

Last active December 14, 2023 21:09

Use C++11's constexpr to achieve string switch

	// http://stackoverflow.com/a/107657
	constexpr unsigned long long int HashStringToInt(const char *str, unsigned long long int hash = 0)
	{
	return (str == 0) ? hash : 101 HashStringToInt(str + 1) + *str;
	}

	void simple_switch(const std::string &str)
	{
	switch (HashStringToInt(str.c_str()))
	{