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