136 lines
2.6 KiB
Go
136 lines
2.6 KiB
Go
package types
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import (
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"encoding"
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"fmt"
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"math/big"
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"strings"
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"github.com/filecoin-project/lotus/build"
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)
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type FIL BigInt
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func (f FIL) String() string {
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return f.Unitless() + " FIL"
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}
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func (f FIL) Unitless() string {
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r := new(big.Rat).SetFrac(f.Int, big.NewInt(int64(build.FilecoinPrecision)))
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if r.Sign() == 0 {
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return "0"
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}
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return strings.TrimRight(strings.TrimRight(r.FloatString(18), "0"), ".")
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}
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var AttoFil = NewInt(1)
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var FemtoFil = BigMul(AttoFil, NewInt(1000))
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var PicoFil = BigMul(FemtoFil, NewInt(1000))
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var NanoFil = BigMul(PicoFil, NewInt(1000))
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var unitPrefixes = []string{"a", "f", "p", "n", "μ", "m"}
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func (f FIL) Short() string {
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n := BigInt(f).Abs()
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dn := uint64(1)
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var prefix string
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for _, p := range unitPrefixes {
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if n.LessThan(NewInt(dn * 1000)) {
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prefix = p
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break
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}
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dn *= 1000
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}
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r := new(big.Rat).SetFrac(f.Int, big.NewInt(int64(dn)))
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if r.Sign() == 0 {
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return "0"
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}
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return strings.TrimRight(strings.TrimRight(r.FloatString(3), "0"), ".") + " " + prefix + "FIL"
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}
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func (f FIL) Nano() string {
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r := new(big.Rat).SetFrac(f.Int, big.NewInt(int64(1e9)))
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if r.Sign() == 0 {
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return "0"
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}
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return strings.TrimRight(strings.TrimRight(r.FloatString(9), "0"), ".") + " nFIL"
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}
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func (f FIL) Format(s fmt.State, ch rune) {
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switch ch {
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case 's', 'v':
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fmt.Fprint(s, f.String())
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default:
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f.Int.Format(s, ch)
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}
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}
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func (f FIL) MarshalText() (text []byte, err error) {
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return []byte(f.String()), nil
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}
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func (f FIL) UnmarshalText(text []byte) error {
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p, err := ParseFIL(string(text))
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if err != nil {
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return err
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}
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f.Int.Set(p.Int)
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return nil
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}
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func ParseFIL(s string) (FIL, error) {
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suffix := strings.TrimLeft(s, "-.1234567890")
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s = s[:len(s)-len(suffix)]
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var attofil bool
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if suffix != "" {
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norm := strings.ToLower(strings.TrimSpace(suffix))
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switch norm {
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case "", "fil":
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case "attofil", "afil":
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attofil = true
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default:
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return FIL{}, fmt.Errorf("unrecognized suffix: %q", suffix)
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}
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}
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if len(s) > 50 {
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return FIL{}, fmt.Errorf("string length too large: %d", len(s))
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}
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r, ok := new(big.Rat).SetString(s)
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if !ok {
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return FIL{}, fmt.Errorf("failed to parse %q as a decimal number", s)
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}
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if !attofil {
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r = r.Mul(r, big.NewRat(int64(build.FilecoinPrecision), 1))
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}
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if !r.IsInt() {
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var pref string
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if attofil {
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pref = "atto"
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}
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return FIL{}, fmt.Errorf("invalid %sFIL value: %q", pref, s)
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}
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return FIL{r.Num()}, nil
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}
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func MustParseFIL(s string) FIL {
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n, err := ParseFIL(s)
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if err != nil {
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panic(err)
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}
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return n
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}
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var _ encoding.TextMarshaler = (*FIL)(nil)
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var _ encoding.TextUnmarshaler = (*FIL)(nil)
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