func ratmod(x, y *big.Rat) *big.Rat {
if x.IsInt() && y.IsInt() {
return new(big.Rat).SetInt(new(big.Int).Mod(x.Num(), y.Num()))
}
panic("operation not permitted")
}
// coinUnits converts a siacoin amount to base units.
func coinUnits(amount string) (string, error) {
units := []string{"pS", "nS", "uS", "mS", "SC", "KS", "MS", "GS", "TS"}
for i, unit := range units {
if strings.HasSuffix(amount, unit) {
// scan into big.Rat
r, ok := new(big.Rat).SetString(strings.TrimSuffix(amount, unit))
if !ok {
return "", errors.New("malformed amount")
}
// convert units
exp := 24 + 3*(int64(i)-4)
mag := new(big.Int).Exp(big.NewInt(10), big.NewInt(exp), nil)
r.Mul(r, new(big.Rat).SetInt(mag))
// r must be an integer at this point
if !r.IsInt() {
return "", errors.New("non-integer number of hastings")
}
return r.RatString(), nil
}
}
// check for hastings separately
if strings.HasSuffix(amount, "H") {
return strings.TrimSuffix(amount, "H"), nil
}
return "", errors.New("amount is missing units; run 'wallet --help' for a list of units")
}
// parseFilesize converts strings of form 10GB to a size in bytes. Fractional
// sizes are truncated at the byte size.
func parseFilesize(strSize string) (string, error) {
units := []struct {
suffix string
multiplier int64
}{
{"kb", 1e3},
{"mb", 1e6},
{"gb", 1e9},
{"tb", 1e12},
{"kib", 1 << 10},
{"mib", 1 << 20},
{"gib", 1 << 30},
{"tib", 1 << 40},
{"b", 1}, // must be after others else it'll match on them all
{"", 1}, // no suffix is still a valid suffix
}
strSize = strings.ToLower(strSize)
for _, unit := range units {
if strings.HasSuffix(strSize, unit.suffix) {
r, ok := new(big.Rat).SetString(strings.TrimSuffix(strSize, unit.suffix))
if !ok {
return "", errUnableToParseSize
}
r.Mul(r, new(big.Rat).SetInt(big.NewInt(unit.multiplier)))
if !r.IsInt() {
f, _ := r.Float64()
return fmt.Sprintf("%d", int64(f)), nil
}
return r.RatString(), nil
}
}
return "", errUnableToParseSize
}
// Returns the parsed duration in nanoseconds, support 'u', 's', 'm',
// 'h', 'd', 'W', 'M', and 'Y' suffixes.
func ParseTimeDuration(value string) (int64, error) {
var constant time.Duration
prefixSize := 1
switch value[len(value)-1] {
case 'u':
constant = time.Microsecond
case 's':
constant = time.Second
case 'm':
constant = time.Minute
case 'h':
constant = time.Hour
case 'd':
constant = 24 * time.Hour
case 'w', 'W':
constant = Week
case 'M':
constant = Month
case 'y', 'Y':
constant = Year
default:
prefixSize = 0
}
if value[len(value)-2:] == "ms" {
constant = time.Millisecond
prefixSize = 2
}
t := big.Rat{}
timeString := value
if prefixSize > 0 {
timeString = value[:len(value)-prefixSize]
}
_, err := fmt.Sscan(timeString, &t)
if err != nil {
return 0, err
}
if prefixSize > 0 {
c := big.Rat{}
c.SetFrac64(int64(constant), 1)
t.Mul(&t, &c)
}
if t.IsInt() {
return t.Num().Int64(), nil
}
f, _ := t.Float64()
return int64(f), nil
}
func NewRational(r *big.Rat) Rational {
if !r.IsInt() || r.Cmp(min) < 0 || r.Cmp(max) > 0 {
return Rational{r}
}
n := r.Num().Int64()
i := n + 256
p := rat[i]
if p.v == nil {
p = Rational{r}
rat[i] = p
}
return p
}
func parseResourceCPU(flags *pflag.FlagSet, resources *api.Resources, name string) error {
cpu, err := flags.GetString(name)
if err != nil {
return err
}
nanoCPUs, ok := new(big.Rat).SetString(cpu)
if !ok {
return fmt.Errorf("invalid cpu: %s", cpu)
}
cpuRat := new(big.Rat).Mul(nanoCPUs, big.NewRat(1e9, 1))
if !cpuRat.IsInt() {
return fmt.Errorf("CPU value cannot have more than 9 decimal places: %s", cpu)
}
resources.NanoCPUs = cpuRat.Num().Int64()
return nil
}
// Returns the parsed duration in nanoseconds, support 'u', 's', 'm',
// 'h', 'd' and 'w' suffixes.
func ParseTimeDuration(value string) (int64, error) {
var constant time.Duration
hasPrefix := true
switch value[len(value)-1] {
case 'u':
constant = time.Microsecond
case 's':
constant = time.Second
case 'm':
constant = time.Minute
case 'h':
constant = time.Hour
case 'd':
constant = 24 * time.Hour
case 'w':
constant = 7 * 24 * time.Hour
case 'y':
constant = 365 * 24 * time.Hour
default:
hasPrefix = false
}
t := big.Rat{}
timeString := value
if hasPrefix {
timeString = value[:len(value)-1]
}
_, err := fmt.Sscan(timeString, &t)
if err != nil {
return 0, err
}
if hasPrefix {
c := big.Rat{}
c.SetFrac64(int64(constant), 1)
t.Mul(&t, &c)
}
if t.IsInt() {
return t.Num().Int64(), nil
}
f, _ := t.Float64()
return int64(f), nil
}
func NewRational(r *big.Rat) *Rational {
if !r.IsInt() || r.Cmp(min) < 0 || r.Cmp(max) > 0 {
return (*Rational)(r)
}
n := r.Num().Int64()
i := n + 256
ratl.RLock()
p := rat[i]
ratl.RUnlock()
if p == nil {
p = (*Rational)(r)
ratl.Lock()
rat[i] = p
ratl.Unlock()
}
return p
}
// normalizeRatConst returns the smallest constant representation
// for the specific value of x; either an int64, *big.Int value,
// or *big.Rat value.
//
func normalizeRatConst(x *big.Rat) interface{} {
if x.IsInt() {
return normalizeIntConst(x.Num())
}
return x
}
func normFloat(x *big.Rat) Value {
if x.IsInt() {
return normInt(x.Num())
}
return floatVal{x}
}
func num(x *big.Rat) string {
if x.IsInt() {
return x.Num().String()
}
return x.String()
}
