Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2#include "spark.h"
3#include <limits.h>
4#include <linux/kernel.h>
5
6#define SPARK_SHIFT 8
7
8/* Print spark lines on outf for numval values in val. */
9int print_spark(char *bf, int size, unsigned long *val, int numval)
10{
11 static const char *ticks[NUM_SPARKS] = {
12 "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"
13 };
14 int i, printed = 0;
15 unsigned long min = ULONG_MAX, max = 0, f;
16
17 for (i = 0; i < numval; i++) {
18 if (val[i] < min)
19 min = val[i];
20 if (val[i] > max)
21 max = val[i];
22 }
23 f = ((max - min) << SPARK_SHIFT) / (NUM_SPARKS - 1);
24 if (f < 1)
25 f = 1;
26 for (i = 0; i < numval; i++) {
27 printed += scnprintf(bf + printed, size - printed, "%s",
28 ticks[((val[i] - min) << SPARK_SHIFT) / f]);
29 }
30
31 return printed;
32}