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|
package xmlrpc
import (
"math"
. "reflect"
)
func isZero(v Value) bool {
switch v.Kind() {
case Bool:
return !v.Bool()
case Int, Int8, Int16, Int32, Int64:
return v.Int() == 0
case Uint, Uint8, Uint16, Uint32, Uint64, Uintptr:
return v.Uint() == 0
case Float32, Float64:
return math.Float64bits(v.Float()) == 0
case Complex64, Complex128:
c := v.Complex()
return math.Float64bits(real(c)) == 0 && math.Float64bits(imag(c)) == 0
case Array:
for i := 0; i < v.Len(); i++ {
if !isZero(v.Index(i)) {
return false
}
}
return true
case Chan, Func, Interface, Map, Ptr, Slice, UnsafePointer:
return v.IsNil()
case String:
return v.Len() == 0
case Struct:
for i := 0; i < v.NumField(); i++ {
if !isZero(v.Field(i)) {
return false
}
}
return true
default:
// This should never happens, but will act as a safeguard for
// later, as a default value doesn't makes sense here.
panic(&ValueError{"reflect.Value.IsZero", v.Kind()})
}
}
|
