1*4882a593Smuzhiyun #include <stdio.h>
2*4882a593Smuzhiyun #include <limits.h>
3*4882a593Smuzhiyun #include <string.h>
4*4882a593Smuzhiyun #include <stdlib.h>
5*4882a593Smuzhiyun #include "spark.h"
6*4882a593Smuzhiyun #include "stat.h"
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #define SPARK_SHIFT 8
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun /* Print spark lines on outf for numval values in val. */
print_spark(char * bf,int size,unsigned long * val,int numval)11*4882a593Smuzhiyun int print_spark(char *bf, int size, unsigned long *val, int numval)
12*4882a593Smuzhiyun {
13*4882a593Smuzhiyun static const char *ticks[NUM_SPARKS] = {
14*4882a593Smuzhiyun "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"
15*4882a593Smuzhiyun };
16*4882a593Smuzhiyun int i, printed = 0;
17*4882a593Smuzhiyun unsigned long min = ULONG_MAX, max = 0, f;
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun for (i = 0; i < numval; i++) {
20*4882a593Smuzhiyun if (val[i] < min)
21*4882a593Smuzhiyun min = val[i];
22*4882a593Smuzhiyun if (val[i] > max)
23*4882a593Smuzhiyun max = val[i];
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun f = ((max - min) << SPARK_SHIFT) / (NUM_SPARKS - 1);
26*4882a593Smuzhiyun if (f < 1)
27*4882a593Smuzhiyun f = 1;
28*4882a593Smuzhiyun for (i = 0; i < numval; i++) {
29*4882a593Smuzhiyun printed += scnprintf(bf + printed, size - printed, "%s",
30*4882a593Smuzhiyun ticks[((val[i] - min) << SPARK_SHIFT) / f]);
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun return printed;
34*4882a593Smuzhiyun }
35