fq/internal/mathextra/big.go

package mathextra

import "math/big"

var BigIntOne = big.NewInt(1)

func BigIntSetBytesSigned(n *big.Int, buf []byte) *big.Int {
	n.SetBytes(buf)
	if len(buf) > 0 && buf[0]&0x80 > 0 {
		n.Sub(n, new(big.Int).Lsh(BigIntOne, uint(len(buf))*8))
	}
	return n
}
num,mathextra: Rename num package to mathextra Think it makes more sense 2022-01-15 20:55:57 +03:00			`package mathextra`
decode,interp: Add arbitrary large integer support (BigInt) Was already handled in fq in various places as gojq uses them Update msgpack to support negative integers that can't represented as int64 Rename read try* number functions to make them more explicit 2022-01-14 03:58:42 +03:00
			`import "math/big"`

			`var BigIntOne = big.NewInt(1)`

			`func BigIntSetBytesSigned(n big.Int, buf []byte) big.Int {`
			`n.SetBytes(buf)`
			`if len(buf) > 0 && buf[0]&0x80 > 0 {`
			`n.Sub(n, new(big.Int).Lsh(BigIntOne, uint(len(buf))*8))`
			`}`
			`return n`
			`}`