89 lines
1.9 KiB
Go
89 lines
1.9 KiB
Go
package pretty
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import (
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"errors"
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"fmt"
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"math"
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"strconv"
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)
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func PrettyPrintInt(n int) {
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switch {
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case math.Abs(float64(n)) >= 1_000_000_000_000:
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fmt.Printf("%dT", n/1_000_000_000_000)
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case math.Abs(float64(n)) >= 1_000_000_000:
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fmt.Printf("%dB", n/1_000_000_000)
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case math.Abs(float64(n)) >= 1_000_000:
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fmt.Printf("%dM", n/1_000_000)
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case math.Abs(float64(n)) >= 1_000:
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fmt.Printf("%dK", n/1_000)
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default:
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fmt.Printf("%df", n)
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}
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}
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func PrettyPrintFloat(f float64) {
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switch {
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case math.Abs(f) >= 1_000_000_000_000:
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fmt.Printf("%.1fT", f/1_000_000_000_000)
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case math.Abs(f) >= 1_000_000_000:
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fmt.Printf("%.1fB", f/1_000_000_000)
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case math.Abs(f) >= 1_000_000:
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fmt.Printf("%.1fM", f/1_000_000)
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case math.Abs(f) >= 1_000:
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fmt.Printf("%.1fK", f/1_000)
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case math.Abs(f) <= 0.0001:
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fmt.Printf("%.5f", f)
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case math.Abs(f) <= 0.001:
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fmt.Printf("%.4f", f)
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case math.Abs(f) <= 0.01:
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fmt.Printf("%.3f", f)
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case math.Abs(f) <= 0.1:
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fmt.Printf("%.2f", f)
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default:
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fmt.Printf("%.1f", f)
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}
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}
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func PrettyPrint2Floats(low float64, high float64) {
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PrettyPrintFloat(low)
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fmt.Printf(" ")
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PrettyPrintFloat(high)
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}
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func multiplyOrPassThroughError(a float64, b float64, err error) (float64, error) {
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if err != nil {
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return b, err
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} else {
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return a * b, nil
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}
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}
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func ParseFloat(word string) (float64, error) {
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// l = len(word) // assuming no UTF stuff
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switch len(word) {
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case 0:
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return 0, errors.New("String to be parsed into float must not be the empty string")
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case 1:
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return strconv.ParseFloat(word, 64)
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}
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n := len(word) - 1
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f, err := strconv.ParseFloat(word[:n], 64)
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switch word[n] {
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case 'K':
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return multiplyOrPassThroughError(1_000, f, err)
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case 'M':
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return multiplyOrPassThroughError(1_000_000, f, err)
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case 'B':
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return multiplyOrPassThroughError(1_000_000_000, f, err)
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case 'T':
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return multiplyOrPassThroughError(1_000_000_000_000, f, err)
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default:
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return f, err
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}
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}
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