Category talk:Wren-big: Difference between revisions
Content added Content deleted
(→Source code: Added testBit method to BigInt.) |
(→Source code: Bug fix.) |
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static integerLogarithm_(value, base) { |
static integerLogarithm_(value, base) { |
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if (base <= value) { |
if (base <= value) { |
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System.write("") // guard against VM recursion bug |
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var tmp = integerLogarithm_(value, base.square) |
var tmp = integerLogarithm_(value, base.square) |
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var p = tmp[0] |
var p = tmp[0] |
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| Line 344: | Line 343: | ||
// Private method to multiply two lists 'x' and 'y' using the Karatsuba algorithm. |
// Private method to multiply two lists 'x' and 'y' using the Karatsuba algorithm. |
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static multiplyKaratsuba_(x, y) { |
static multiplyKaratsuba_(x, y) { |
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var n = (x.count > y.count) ? |
var n = (x.count > y.count) ? y.count : x.count |
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if (n <= 30) return multiplyLong_(x, y) |
if (n <= 30) return multiplyLong_(x, y) |
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n = (n/2). |
n = (n/2).floor |
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var a = x[0...n] |
var a = x[0...n] |
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var b = x[n..-1] |
var b = x[n..-1] |
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var c = y[0...n] |
var c = y[0...n] |
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var d = y[n..-1] |
var d = y[n..-1] |
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System.write("") // guard against VM recursion bug |
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var ac = multiplyKaratsuba_(a, c) |
var ac = multiplyKaratsuba_(a, c) |
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var bd = multiplyKaratsuba_(b, d) |
var bd = multiplyKaratsuba_(b, d) |
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