55 lines
924 B
Go
55 lines
924 B
Go
package ar
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import "math/big"
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const lenops int64 = 9
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type OpsFunc func(a, b *big.Int) *big.Int
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var ops [lenops]OpsFunc
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func init() {
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ops[0] = Add
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ops[1] = Mul
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ops[2] = Mod
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ops[3] = Xor
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ops[4] = And
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ops[5] = Or
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ops[6] = Sub1
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ops[7] = XorSub
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ops[8] = Rsh
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}
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func Add(x, y *big.Int) *big.Int {
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return new(big.Int).Add(x, y)
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}
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func Mul(x, y *big.Int) *big.Int {
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return new(big.Int).Mul(x, y)
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}
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func Mod(x, y *big.Int) *big.Int {
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return new(big.Int).Mod(x, y)
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}
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func Xor(x, y *big.Int) *big.Int {
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return new(big.Int).Xor(x, y)
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}
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func And(x, y *big.Int) *big.Int {
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return new(big.Int).And(x, y)
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}
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func Or(x, y *big.Int) *big.Int {
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return new(big.Int).Or(x, y)
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}
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func Sub1(x, y *big.Int) *big.Int {
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a := big.NewInt(-1)
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a.Sub(a, x)
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return a
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}
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func XorSub(x, y *big.Int) *big.Int {
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t := Sub1(x, nil)
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return t.Xor(t, y)
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}
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func Rsh(x, y *big.Int) *big.Int {
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return new(big.Int).Rsh(x, uint(y.Uint64()%64))
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}
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