| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1 | #include <stdio.h> |
| 2 | #include <limits.h> |
| 3 | #include <string.h> |
| 4 | #include <stdlib.h> |
| 5 | #include "spark.h" |
| 6 | #include "stat.h" |
| 7 | |
| 8 | #define SPARK_SHIFT 8 |
| 9 | |
| 10 | /* Print spark lines on outf for numval values in val. */ |
| 11 | int print_spark(char *bf, int size, unsigned long *val, int numval) |
| 12 | { |
| 13 | static const char *ticks[NUM_SPARKS] = { |
| 14 | "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" |
| 15 | }; |
| 16 | int i, printed = 0; |
| 17 | unsigned long min = ULONG_MAX, max = 0, f; |
| 18 | |
| 19 | for (i = 0; i < numval; i++) { |
| 20 | if (val[i] < min) |
| 21 | min = val[i]; |
| 22 | if (val[i] > max) |
| 23 | max = val[i]; |
| 24 | } |
| 25 | f = ((max - min) << SPARK_SHIFT) / (NUM_SPARKS - 1); |
| 26 | if (f < 1) |
| 27 | f = 1; |
| 28 | for (i = 0; i < numval; i++) { |
| 29 | printed += scnprintf(bf + printed, size - printed, "%s", |
| 30 | ticks[((val[i] - min) << SPARK_SHIFT) / f]); |
| 31 | } |
| 32 | |
| 33 | return printed; |
| 34 | } |