package types import ( "fmt" "math/big" big2 "github.com/filecoin-project/specs-actors/actors/abi/big" "github.com/filecoin-project/lotus/build" ) const BigIntMaxSerializedLen = 128 // is this big enough? or too big? var TotalFilecoinInt = FromFil(build.TotalFilecoin) var EmptyInt = BigInt{} type BigInt = big2.Int func NewInt(i uint64) BigInt { return BigInt{Int: big.NewInt(0).SetUint64(i)} } func FromFil(i uint64) BigInt { return BigMul(NewInt(i), NewInt(build.FilecoinPrecision)) } func BigFromBytes(b []byte) BigInt { i := big.NewInt(0).SetBytes(b) return BigInt{Int: i} } func BigFromString(s string) (BigInt, error) { v, ok := big.NewInt(0).SetString(s, 10) if !ok { return BigInt{}, fmt.Errorf("failed to parse string as a big int") } return BigInt{Int: v}, nil } func BigMul(a, b BigInt) BigInt { return BigInt{Int: big.NewInt(0).Mul(a.Int, b.Int)} } func BigDiv(a, b BigInt) BigInt { return BigInt{Int: big.NewInt(0).Div(a.Int, b.Int)} } func BigMod(a, b BigInt) BigInt { return BigInt{Int: big.NewInt(0).Mod(a.Int, b.Int)} } func BigAdd(a, b BigInt) BigInt { return BigInt{Int: big.NewInt(0).Add(a.Int, b.Int)} } func BigSub(a, b BigInt) BigInt { return BigInt{Int: big.NewInt(0).Sub(a.Int, b.Int)} } func BigCmp(a, b BigInt) int { return a.Int.Cmp(b.Int) } var byteSizeUnits = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB"} func SizeStr(bi BigInt) string { r := new(big.Rat).SetInt(bi.Int) den := big.NewRat(1, 1024) var i int for f, _ := r.Float64(); f >= 1024 && i+1 < len(byteSizeUnits); f, _ = r.Float64() { i++ r = r.Mul(r, den) } f, _ := r.Float64() return fmt.Sprintf("%.3g %s", f, byteSizeUnits[i]) } var decUnits = []string{"", "K", "M", "G", "T", "P", "E", "Z"} func DecStr(bi BigInt) string { r := new(big.Rat).SetInt(bi.Int) den := big.NewRat(1, 1000) var i int for f, _ := r.Float64(); f >= 1000 && i+1 < len(decUnits); f, _ = r.Float64() { i++ r = r.Mul(r, den) } f, _ := r.Float64() return fmt.Sprintf("%.3g %s", f, decUnits[i]) }