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// SPDX-License-Identifier: GPL-2.0
#include "spark.h"
#include <limits.h>
#include <linux/kernel.h>
#define SPARK_SHIFT 8
/* Print spark lines on outf for numval values in val. */
int print_spark(char *bf, int size, unsigned long *val, int numval)
{
static const char *ticks[NUM_SPARKS] = {
"▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"
};
int i, printed = 0;
unsigned long min = ULONG_MAX, max = 0, f;
for (i = 0; i < numval; i++) {
if (val[i] < min)
min = val[i];
if (val[i] > max)
max = val[i];
}
f = ((max - min) << SPARK_SHIFT) / (NUM_SPARKS - 1);
if (f < 1)
f = 1;
for (i = 0; i < numval; i++) {
printed += scnprintf(bf + printed, size - printed, "%s",
ticks[((val[i] - min) << SPARK_SHIFT) / f]);
}
return printed;
}
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