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// Copyright 2021 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package convert
import (
"database/sql"
"fmt"
"math/big"
"reflect"
"strconv"
)
// AsFloat64 convets interface as float64
func AsFloat64(src interface{}) (float64, error) {
switch v := src.(type) {
case int:
return float64(v), nil
case int16:
return float64(v), nil
case int32:
return float64(v), nil
case int8:
return float64(v), nil
case int64:
return float64(v), nil
case uint:
return float64(v), nil
case uint8:
return float64(v), nil
case uint16:
return float64(v), nil
case uint32:
return float64(v), nil
case uint64:
return float64(v), nil
case []byte:
return strconv.ParseFloat(string(v), 64)
case string:
return strconv.ParseFloat(v, 64)
case *sql.NullString:
return strconv.ParseFloat(v.String, 64)
case *sql.NullInt32:
return float64(v.Int32), nil
case *sql.NullInt64:
return float64(v.Int64), nil
case *sql.NullFloat64:
return v.Float64, nil
}
rv := reflect.ValueOf(src)
switch rv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return float64(rv.Int()), nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return float64(rv.Uint()), nil
case reflect.Float64, reflect.Float32:
return float64(rv.Float()), nil
case reflect.String:
return strconv.ParseFloat(rv.String(), 64)
}
return 0, fmt.Errorf("unsupported value %T as int64", src)
}
// AsBigFloat converts interface as big.Float
func AsBigFloat(src interface{}) (*big.Float, error) {
res := big.NewFloat(0)
switch v := src.(type) {
case int:
res.SetInt64(int64(v))
return res, nil
case int16:
res.SetInt64(int64(v))
return res, nil
case int32:
res.SetInt64(int64(v))
return res, nil
case int8:
res.SetInt64(int64(v))
return res, nil
case int64:
res.SetInt64(int64(v))
return res, nil
case uint:
res.SetUint64(uint64(v))
return res, nil
case uint8:
res.SetUint64(uint64(v))
return res, nil
case uint16:
res.SetUint64(uint64(v))
return res, nil
case uint32:
res.SetUint64(uint64(v))
return res, nil
case uint64:
res.SetUint64(uint64(v))
return res, nil
case []byte:
res.SetString(string(v))
return res, nil
case string:
res.SetString(v)
return res, nil
case *sql.NullString:
if v.Valid {
res.SetString(v.String)
return res, nil
}
return nil, nil
case *sql.NullInt32:
if v.Valid {
res.SetInt64(int64(v.Int32))
return res, nil
}
return nil, nil
case *sql.NullInt64:
if v.Valid {
res.SetInt64(int64(v.Int64))
return res, nil
}
return nil, nil
}
rv := reflect.ValueOf(src)
switch rv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
res.SetInt64(rv.Int())
return res, nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
res.SetUint64(rv.Uint())
return res, nil
case reflect.Float64, reflect.Float32:
res.SetFloat64(rv.Float())
return res, nil
case reflect.String:
res.SetString(rv.String())
return res, nil
}
return nil, fmt.Errorf("unsupported value %T as big.Float", src)
}
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