#include "getcpuid.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

/*
* This code is adapted from an example at:
* http://brokestream.com/procstat.html
*/

int get_cpu_id()
{
	/* Get the the current process' stat file from the proc filesystem */
	FILE* procfile = fopen("/proc/self/stat", "r");
	long to_read = 8192;
	char buffer[to_read];
	int read = fread(buffer, sizeof(char), to_read, procfile);
	fclose(procfile);

	// Field with index 38 (zero-based counting) is the one we want
	char* line = strtok(buffer, " ");
	for (int i = 1; i < 38; i++)
	{
		line = strtok(NULL, " ");
	}

	line = strtok(NULL, " ");
	int cpu_id = atoi(line);
	return cpu_id;
}