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14 lines
258 B
Go
14 lines
258 B
Go
package mathextra
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import "math/big"
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var BigIntOne = big.NewInt(1)
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func BigIntSetBytesSigned(n *big.Int, buf []byte) *big.Int {
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n.SetBytes(buf)
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if len(buf) > 0 && buf[0]&0x80 > 0 {
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n.Sub(n, new(big.Int).Lsh(BigIntOne, uint(len(buf))*8))
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}
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return n
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}
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