65 lines
1.3 KiB
Go
65 lines
1.3 KiB
Go
package builtin
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import (
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"encoding/json"
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"math"
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"reflect"
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"git.xdrm.io/go/aicra/datatype"
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)
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// UintDataType is what its name tells
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type UintDataType struct{}
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// Type returns the type of data
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func (UintDataType) Type() reflect.Type {
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return reflect.TypeOf(uint(0))
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}
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// Build returns the validator
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func (UintDataType) Build(typeName string, registry ...datatype.T) datatype.Validator {
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// nothing if type not handled
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if typeName != "uint" {
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return nil
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}
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return func(value interface{}) (interface{}, bool) {
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switch cast := value.(type) {
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case int:
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return uint(cast), cast >= 0
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case uint:
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return cast, true
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case float64:
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uintVal := uint(cast)
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overflows := cast < 0 || cast > math.MaxUint64
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return uintVal, cast == float64(uintVal) && !overflows
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// serialized string -> try to convert to float
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case string:
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num := json.Number(cast)
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floatVal, err := num.Float64()
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if err != nil {
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return 0, false
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}
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overflows := floatVal < 0 || floatVal > math.MaxUint64
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return uint(floatVal), !overflows
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case []byte:
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num := json.Number(cast)
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floatVal, err := num.Float64()
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if err != nil {
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return 0, false
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}
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overflows := floatVal < 0 || floatVal > math.MaxUint64
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return uint(floatVal), !overflows
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// unknown type
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default:
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return 0, false
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}
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}
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}
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