1*cebf7d51SJin Yao #include <stdio.h>
2*cebf7d51SJin Yao #include <limits.h>
3*cebf7d51SJin Yao #include <string.h>
4*cebf7d51SJin Yao #include <stdlib.h>
5*cebf7d51SJin Yao #include "spark.h"
6*cebf7d51SJin Yao #include "stat.h"
7*cebf7d51SJin Yao
8*cebf7d51SJin Yao #define SPARK_SHIFT 8
9*cebf7d51SJin Yao
10*cebf7d51SJin Yao /* Print spark lines on outf for numval values in val. */
print_spark(char * bf,int size,unsigned long * val,int numval)11*cebf7d51SJin Yao int print_spark(char *bf, int size, unsigned long *val, int numval)
12*cebf7d51SJin Yao {
13*cebf7d51SJin Yao static const char *ticks[NUM_SPARKS] = {
14*cebf7d51SJin Yao "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"
15*cebf7d51SJin Yao };
16*cebf7d51SJin Yao int i, printed = 0;
17*cebf7d51SJin Yao unsigned long min = ULONG_MAX, max = 0, f;
18*cebf7d51SJin Yao
19*cebf7d51SJin Yao for (i = 0; i < numval; i++) {
20*cebf7d51SJin Yao if (val[i] < min)
21*cebf7d51SJin Yao min = val[i];
22*cebf7d51SJin Yao if (val[i] > max)
23*cebf7d51SJin Yao max = val[i];
24*cebf7d51SJin Yao }
25*cebf7d51SJin Yao f = ((max - min) << SPARK_SHIFT) / (NUM_SPARKS - 1);
26*cebf7d51SJin Yao if (f < 1)
27*cebf7d51SJin Yao f = 1;
28*cebf7d51SJin Yao for (i = 0; i < numval; i++) {
29*cebf7d51SJin Yao printed += scnprintf(bf + printed, size - printed, "%s",
30*cebf7d51SJin Yao ticks[((val[i] - min) << SPARK_SHIFT) / f]);
31*cebf7d51SJin Yao }
32*cebf7d51SJin Yao
33*cebf7d51SJin Yao return printed;
34*cebf7d51SJin Yao }
35