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package internal |
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import ( |
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"math" |
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"reflect" |
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"strconv" |
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"github.com/gotilty/gotil/internal/errs" |
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) |
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//ToInt64 returns int64(0) with an error if the parameter is unsupported type. |
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//Just works with all primitive types. |
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func ToInt64(a interface{}) (int64, error) { |
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val := reflect.ValueOf(a) |
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switch val.Kind() { |
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: |
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return int64(val.Int()), nil |
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case reflect.Float32, reflect.Float64: |
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return fromFloat64ToInt64(val.Float()) |
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case reflect.String: |
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return fromStringToInt64(val.String()) |
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64: |
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return fromUint64ToInt64(val.Uint()) |
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case reflect.Bool: |
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return fromBoolToInt64(val.Bool()) |
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default: |
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if a == nil { |
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return 0, nil |
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} |
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return 0, errs.Int64Error(val.Kind().String()) |
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} |
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} |
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func fromFloat64ToInt64(s float64) (int64, error) { |
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var maxInt int64 = math.MaxInt64 |
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if s > float64(maxInt) { |
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return 0, errs.CustomError("the entered number cannot be greater than max int64.") |
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} |
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return int64(s), nil |
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} |
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func fromStringToInt64(s string) (int64, error) { |
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if s == "" { |
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return 0, nil |
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} |
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d, err := strconv.ParseInt(s, 10, 64) |
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if err == nil { |
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return int64(d), nil |
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} |
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return 0, err |
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} |
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func fromUint64ToInt64(s uint64) (int64, error) { |
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var maxInt int64 = math.MaxInt32 + 1 |
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if s > uint64(maxInt) { |
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return 0, errs.CustomError("The entered number cannot be greater than max int64.") |
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} |
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return int64(s), nil |
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} |
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func fromBoolToInt64(s bool) (int64, error) { |
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if s { |
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return 1, nil |
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} else { |
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return 0, nil |
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} |
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} |
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gotilty /
gotil
