q5/convert.go

package q5

import (
	"errors"
	"strconv"
	"strings"
)

// ToInt converts a value to an integer.
func ToInt32[T string | int | int32 | int64 | float32 | float64](value T) int32 {
	return int32(ToInt64(value))
}

// ToInt converts a value to an integer.
func ToInt[T string | int32 | int64 | float32 | float64](value T) int {
	return int(ToInt64(value))
}

// ToInt64 converts a value to an int64.
func ToInt64[T string | int | int32 | int64 | float32 | float64](value T) int64 {
	var x interface{} = value
	switch i := x.(type) {
	case int:
		return int64(i)
	case int32:
		return int64(i)
	case int64:
		return i
	case float32:
		return int64(i)
	case float64:
		return int64(i)
	case string:
		intValue, err := strconv.ParseInt(i, 10, 64)
		if err != nil {
			return 0
		}
		return intValue
	}
	return 0
}

func ToFloat32[T string | int | int32 | int64 | float32 | float64](value T) float32 {
	return float32(ToFloat64(value))
}

// ToFloat converts a value to a float64.
func ToFloat64[T string | int | int32 | int64 | float32 | float64](value T) float64 {
	var x interface{} = value
	switch i := x.(type) {
	case int:
		return float64(i)
	case int32:
		return float64(i)
	case int64:
		return float64(i)
	case float32:
		return float64(i)
	case float64:
		return i
	case string:
		f, _ := strconv.ParseFloat(strings.TrimSpace(i), 64)
		return f
	}
	return 0.0
}

// ToString converts a value to a string.
func ToString[T string | int | int32 | int64 | float32 | float64](value T) string {
	var x interface{} = value
	switch i := x.(type) {
	case int:
		return strconv.Itoa(i)
	case int32:
		return strconv.Itoa(int(i))
	case int64:
		return strconv.FormatInt(i, 10)
	case float32:
		return strconv.FormatFloat(float64(i), 'f', -1, 32)
	case float64:
		return strconv.FormatFloat(i, 'f', -1, 64)
	case string:
		return i
	}
	return ""
}

func ToInt64Ex(x interface{}) (int64, error) {
	switch i := x.(type) {
	case int:
		return int64(i), nil
	case int32:
		return int64(i), nil
	case int64:
		return i, nil
	case float32:
		return int64(i), nil
	case float64:
		return int64(i), nil
	case string:
		intValue, err := strconv.ParseInt(i, 10, 64)
		if err != nil {
			return 0, nil
		}
		return intValue, nil
	}
	return 0, errors.New("ToInt64Ex error type")
}

func ToFloat64Ex(x interface{}) (float64, error) {
	switch i := x.(type) {
	case int:
		return float64(i), nil
	case int32:
		return float64(i), nil
	case int64:
		return float64(i), nil
	case float32:
		return float64(i), nil
	case float64:
		return i, nil
	case string:
		f, _ := strconv.ParseFloat(strings.TrimSpace(i), 64)
		return f, nil
	}
	return 0, errors.New("ToFloat64Ex error type")
}

func ToStringEx(x interface{}) (string, error) {
	switch i := x.(type) {
	case int:
		return strconv.Itoa(i), nil
	case int32:
		return strconv.Itoa(int(i)), nil
	case int64:
		return strconv.FormatInt(i, 10), nil
	case float32:
		return strconv.FormatFloat(float64(i), 'f', -1, 32), nil
	case float64:
		return strconv.FormatFloat(i, 'f', -1, 64), nil
	case string:
		return i, nil
	}
	return "", errors.New("ToStringEx error type")
}

func DuckToSimple[T string | int | int32 | int64 | float32 | float64](
	d interface{}, s *T) bool {
	var sx interface{} = s
	switch sv := sx.(type) {
	case *int:
		{
			if val, err := ToInt64Ex(d); err == nil {
				*sv = int(val)
			} else {
				return false
			}
		}
	case *int32:
		{
			if val, err := ToInt64Ex(d); err == nil {
				*sv = int32(val)
			} else {
				return false
			}
		}
	case *int64:
		{
			if val, err := ToInt64Ex(d); err == nil {
				*sv = val
			} else {
				return false
			}
		}
	case *float32:
		{
			if val, err := ToFloat64Ex(d); err == nil {
				*sv = float32(val)
			} else {
				return false
			}
		}
	case *float64:
		{
			if val, err := ToFloat64Ex(d); err == nil {
				*sv = val
			} else {
				return false
			}
		}
	case *string:
		{
			if val, err := ToStringEx(d); err == nil {
				*sv = val
			} else {
				return false
			}
		}
	}
	return true
}