#include <stdio.h>
#include "block.h"
#define ICON_CPU "  "
FILE *proc_stat;
int stat[8], cpu_delay = 6;
double prev_idle, prev_total, total, idle, usage_p;
char usage_str[11];
void cpu(void) {
	if (cpu_delay++ < 6) goto show_stat;
	else cpu_delay = 0;
	prev_idle = idle;
	prev_total = total;
	if (!proc_stat) proc_stat = fopen("/proc/stat","r");
	if (proc_stat) {
		int c, i;
		fseek(proc_stat,5,0);
		for (i = 0;i < 8;i++) stat[i] = 0;
		for (i = 0; i < 8;) {
			c = fgetc(proc_stat);
			if (c != ' ')
				stat[i] = 10 * stat[i] + (c - '0');
			else i++;
		}
		total = stat[0]+stat[1]+stat[2];
		idle = stat[3]+stat[4];
		total += stat[5]+stat[6]+stat[7];
	}
	usage_p = (idle + total) - (prev_idle + prev_total);
	usage_p -= (idle - prev_idle);
	usage_p *= 100;
	usage_p /= (idle + total) - (prev_idle + prev_total);
	snprintf(usage_str,11,ICON_CPU"%02.2f%%",usage_p);
show_stat:
	if (usage_p < 60)
		block(usage_str,"#222222","#acae3299","#acae3299");
	else
		block(usage_str,"#222222","#ea544399","#ea544399");
}