40 lines
821 B
Bash
40 lines
821 B
Bash
#!/bin/bash
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cache_vals(){
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echo "$1" > "$3"
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echo -n "$2" >> "$3"
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}
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cached_eval(){
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local dir
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local a0
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local t0
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local a1
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local t1
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dir="/tmp/$1"
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a1="$2"
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t1="$3"
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if [ -f "$dir" ]; then
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a0="$(head -n1 "$dir")"
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t0="$(tail -n+2 "$dir")"
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cache_vals "$a1" "$t1" "$dir"
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awk -v a1="$a1" \
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-v t1="$t1" \
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-v a0="$a0" \
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-v t0="$t0" \
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'BEGIN {print (a1-a0)/(t1-t0)}'
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else
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cache_vals "$a1" "$t1" "$dir"
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echo -n 0
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fi
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}
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fmt_percent(){
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awk "$(printf '%s' \
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'{x=$1*100} END { '\
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'if (x>=100) printf("%d%% ", x); '\
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'else if (x>=10) printf("%.1f%%", x); '\
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'else printf("%.2f%%", x)'\
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'}')"
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}
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