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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"
"reflect"
"strconv"
)
// AsString converts interface as string
func AsString(src interface{}) string {
switch v := src.(type) {
case string:
return v
case []byte:
return string(v)
case *sql.NullString:
return v.String
case *sql.NullInt32:
return fmt.Sprintf("%d", v.Int32)
case *sql.NullInt64:
return fmt.Sprintf("%d", v.Int64)
}
rv := reflect.ValueOf(src)
switch rv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return strconv.FormatInt(rv.Int(), 10)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return strconv.FormatUint(rv.Uint(), 10)
case reflect.Float64:
return strconv.FormatFloat(rv.Float(), 'g', -1, 64)
case reflect.Float32:
return strconv.FormatFloat(rv.Float(), 'g', -1, 32)
case reflect.Bool:
return strconv.FormatBool(rv.Bool())
}
return fmt.Sprintf("%v", src)
}
// AsBytes converts interface as bytes
func AsBytes(src interface{}) ([]byte, bool) {
switch t := src.(type) {
case []byte:
return t, true
case *sql.NullString:
if !t.Valid {
return nil, true
}
return []byte(t.String), true
case *sql.RawBytes:
return *t, true
}
rv := reflect.ValueOf(src)
switch rv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return strconv.AppendInt(nil, rv.Int(), 10), true
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return strconv.AppendUint(nil, rv.Uint(), 10), true
case reflect.Float32:
return strconv.AppendFloat(nil, rv.Float(), 'g', -1, 32), true
case reflect.Float64:
return strconv.AppendFloat(nil, rv.Float(), 'g', -1, 64), true
case reflect.Bool:
return strconv.AppendBool(nil, rv.Bool()), true
case reflect.String:
return []byte(rv.String()), true
}
return nil, false
}
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