97 lines
2.0 KiB
Go
97 lines
2.0 KiB
Go
package types
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import (
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"fmt"
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"math/big"
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big2 "github.com/filecoin-project/specs-actors/actors/abi/big"
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"github.com/filecoin-project/lotus/build"
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)
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const BigIntMaxSerializedLen = 128 // is this big enough? or too big?
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var TotalFilecoinInt = FromFil(build.TotalFilecoin)
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var EmptyInt = BigInt{}
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type BigInt = big2.Int
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func NewInt(i uint64) BigInt {
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return BigInt{Int: big.NewInt(0).SetUint64(i)}
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}
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func FromFil(i uint64) BigInt {
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return BigMul(NewInt(i), NewInt(build.FilecoinPrecision))
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}
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func BigFromBytes(b []byte) BigInt {
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i := big.NewInt(0).SetBytes(b)
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return BigInt{Int: i}
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}
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func BigFromString(s string) (BigInt, error) {
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v, ok := big.NewInt(0).SetString(s, 10)
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if !ok {
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return BigInt{}, fmt.Errorf("failed to parse string as a big int")
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}
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return BigInt{Int: v}, nil
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}
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func BigMul(a, b BigInt) BigInt {
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return BigInt{Int: big.NewInt(0).Mul(a.Int, b.Int)}
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}
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func BigDiv(a, b BigInt) BigInt {
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return BigInt{Int: big.NewInt(0).Div(a.Int, b.Int)}
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}
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func BigMod(a, b BigInt) BigInt {
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return BigInt{Int: big.NewInt(0).Mod(a.Int, b.Int)}
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}
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func BigAdd(a, b BigInt) BigInt {
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return BigInt{Int: big.NewInt(0).Add(a.Int, b.Int)}
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}
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func BigSub(a, b BigInt) BigInt {
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return BigInt{Int: big.NewInt(0).Sub(a.Int, b.Int)}
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}
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func BigCmp(a, b BigInt) int {
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return a.Int.Cmp(b.Int)
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}
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var byteSizeUnits = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB"}
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func SizeStr(bi BigInt) string {
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r := new(big.Rat).SetInt(bi.Int)
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den := big.NewRat(1, 1024)
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var i int
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for f, _ := r.Float64(); f >= 1024 && i+1 < len(byteSizeUnits); f, _ = r.Float64() {
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i++
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r = r.Mul(r, den)
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}
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f, _ := r.Float64()
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return fmt.Sprintf("%.4g %s", f, byteSizeUnits[i])
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}
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var deciUnits = []string{"", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi"}
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func DeciStr(bi BigInt) string {
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r := new(big.Rat).SetInt(bi.Int)
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den := big.NewRat(1, 1024)
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var i int
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for f, _ := r.Float64(); f >= 1024 && i+1 < len(deciUnits); f, _ = r.Float64() {
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i++
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r = r.Mul(r, den)
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}
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f, _ := r.Float64()
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return fmt.Sprintf("%.3g %s", f, deciUnits[i])
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}
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