25 lines
517 B
Go
25 lines
517 B
Go
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package octal
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import (
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"errors"
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"math"
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)
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// ParseOctal takes a string representation of an octal number
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// and returns the decimal value of that number, or an error if it
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// was unparseable as an octal number
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func ParseOctal(v string) (int64, error) {
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var ret float64
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octLen := float64(len(v))
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for i := range v {
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octLen--
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switch {
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case v[i] > 47 && v[i] < 56:
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ret = ret + float64(v[i]-48)*math.Pow(8, octLen)
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default:
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return 0, errors.New("Unparseable as octal")
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}
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}
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return int64(ret), nil
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}
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