cpu_perc: Documentation and readbility improvements

components/cpu.c

@@ -25,6 +25,7 @@
 		long double b[7];
 
 		memcpy(b, a, sizeof(b));
+		/* cpu user nice system idle iowait irq softirq */
 		if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf",
 		           &a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[6]) != 7) {
 			return NULL;
@@ -34,11 +35,10 @@
 			return NULL;
 		}
 
-		perc = 100 *
-		       ((b[0]+b[1]+b[2]+b[5]+b[6]) -
-		        (a[0]+a[1]+a[2]+a[5]+a[6])) /
-		       ((b[0]+b[1]+b[2]+b[3]+b[4]+b[5]+b[6]) -
-		        (a[0]+a[1]+a[2]+a[3]+a[4]+a[5]+a[6]));
+		perc = 100 * ((b[0] + b[1] + b[2] + b[5] + b[6]) -
+		              (a[0] + a[1] + a[2] + a[5] + a[6])) /
+		             ((b[0] + b[1] + b[2] + b[3] + b[4] + b[5] + b[6]) -
+		              (a[0] + a[1] + a[2] + a[3] + a[4] + a[5] + a[6]));
 
 		return bprintf("%d", perc);
 	}
@@ -117,10 +117,10 @@
 		}
 
 		perc = 100 *
-		       ((a[CP_USER]+a[CP_NICE]+a[CP_SYS]+a[CP_INTR]) -
-		        (b[CP_USER]+b[CP_NICE]+b[CP_SYS]+b[CP_INTR])) /
-		       ((a[CP_USER]+a[CP_NICE]+a[CP_SYS]+a[CP_INTR]+a[CP_IDLE]) -
-		        (b[CP_USER]+b[CP_NICE]+b[CP_SYS]+b[CP_INTR]+b[CP_IDLE]));
+		      ((a[CP_USER] + a[CP_NICE] + a[CP_SYS] + a[CP_INTR]) -
+		       (b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR])) /
+		      ((a[CP_USER] + a[CP_NICE] + a[CP_SYS] + a[CP_INTR] + a[CP_IDLE]) -
+		       (b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR] + b[CP_IDLE]));
 
 		return bprintf("%d", perc);
 	}