AliBarber

File Creation Ordering

Problem Statement:

We wish to sort a set of arbitrary files by the order in which they were created. We cannot however rely on the system clock (hence the 'created at' time), file name, or time since reboot (e.g. millis). We do however have a linux operating system and file system. We should therefore be able to use the inode ids of the file to order them.

Example

Setup

Create some files, resetting the system clock in between each creation. The files will start with a number that is deliberately out of sequence in order to show that we're not sorting just by name.

AliBarber

#include <iostream>
#include <math.h>

using namespace std;

int main(int argc, char **argv){
	if(argc != 2){
		cout << "Usage:\n" << argv[0] << "\t BASE_FREQUENCY" << endl;
		return 1;
	}

AliBarber

#include <iostream>
#include <iomanip>
#include <string>
#include <fstream>

#define RISE_FALL_TIME 1e-9
#define LOW 0.0
#define HIGH 3.3

#define MAX(a,b) ((a) > (b)) ? (a) : (b)

AliBarber

unsigned char constant BitReverseTable256[256]  = 
{
#   define R2(n)     n,     n + 2*64,     n + 1*64,     n + 3*64
#   define R4(n) R2(n), R2(n + 2*16), R2(n + 1*16), R2(n + 3*16)
#   define R6(n) R4(n), R4(n + 2*4 ), R4(n + 1*4 ), R4(n + 3*4 )
    R6(0), R6(2), R6(1), R6(3)
};

int constant MultiplyDeBruijnBitPosition[32] = 
{

AliBarber

/*
 * AudioPipe.cpp - Alastair Barber 2017.
 * Will open a device, read from it, and write the audio to another device. Eg. Mic -> HDMI sound output
 */

#include "portaudio.h"
#include <iostream>
#include <signal.h>
#include <unistd.h>
#include <stdlib.h>