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package safecast
import "math"
func negative[T Number](t T) bool {
return t < 0
}
func sameSign[T1, T2 Number](a T1, b T2) bool {
return negative(a) == negative(b)
}
func getUpperBoundary(value any) any {
var upper any = math.Inf(1)
switch value.(type) {
case int8:
upper = int8(math.MaxInt8)
case int16:
upper = int16(math.MaxInt16)
case int32:
upper = int32(math.MaxInt32)
case int64:
upper = int64(math.MaxInt64)
case int:
upper = int(math.MaxInt)
case uint8:
upper = uint8(math.MaxUint8)
case uint32:
upper = uint32(math.MaxUint32)
case uint16:
upper = uint16(math.MaxUint16)
case uint64:
upper = uint64(math.MaxUint64)
case uint:
upper = uint(math.MaxUint)
// Note: there is no float64 boundary
// because float64 cannot overflow
case float32:
upper = float32(math.MaxFloat32)
}
return upper
}
func getLowerBoundary(value any) any {
var lower any = math.Inf(-1)
switch value.(type) {
case int64:
lower = int64(math.MinInt64)
case int32:
lower = int32(math.MinInt32)
case int16:
lower = int16(math.MinInt16)
case int8:
lower = int8(math.MinInt8)
case int:
lower = int(math.MinInt)
case uint:
lower = uint(0)
case uint8:
lower = uint8(0)
case uint16:
lower = uint16(0)
case uint32:
lower = uint32(0)
case uint64:
lower = uint64(0)
// Note: there is no float64 boundary
// because float64 cannot overflow
case float32:
lower = float32(-math.MaxFloat32)
}
return lower
}
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