Simple and Powerful ORM for Go, support mysql,postgres,tidb,sqlite3,sqlite,mssql,oracle,cockroach https://xorm.io
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// Copyright 2019 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 statements
import (
"fmt"
"reflect"
"strings"
"time"
"xorm.io/builder"
"xorm.io/xorm/schemas"
)
func quoteNeeded(a interface{}) bool {
switch a.(type) {
case int, int8, int16, int32, int64:
return false
case uint, uint8, uint16, uint32, uint64:
return false
case float32, float64:
return false
case bool:
return false
case string:
return true
case time.Time, *time.Time:
return true
case builder.Builder, *builder.Builder:
return false
}
t := reflect.TypeOf(a)
switch t.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return false
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return false
case reflect.Float32, reflect.Float64:
return false
case reflect.Bool:
return false
case reflect.String:
return true
}
return true
}
func convertStringSingleQuote(arg string) string {
return "'" + strings.Replace(arg, "'", "''", -1) + "'"
}
func convertString(arg string) string {
var buf strings.Builder
buf.WriteRune('\'')
for _, c := range arg {
if c == '\\' || c == '\'' {
buf.WriteRune('\\')
}
buf.WriteRune(c)
}
buf.WriteRune('\'')
return buf.String()
}
func convertArg(arg interface{}, convertFunc func(string) string) string {
if quoteNeeded(arg) {
argv := fmt.Sprintf("%v", arg)
return convertFunc(argv)
}
return fmt.Sprintf("%v", arg)
}
const insertSelectPlaceHolder = true
// WriteArg writes an arg
func (statement *Statement) WriteArg(w *builder.BytesWriter, arg interface{}) error {
switch argv := arg.(type) {
case *builder.Builder:
if _, err := w.WriteString("("); err != nil {
return err
}
if err := argv.WriteTo(w); err != nil {
return err
}
if _, err := w.WriteString(")"); err != nil {
return err
}
default:
if insertSelectPlaceHolder {
if err := w.WriteByte('?'); err != nil {
return err
}
if v, ok := arg.(bool); ok && statement.dialect.URI().DBType == schemas.MSSQL {
if v {
w.Append(1)
} else {
w.Append(0)
}
} else {
w.Append(arg)
}
} else {
var convertFunc = convertStringSingleQuote
if statement.dialect.URI().DBType == schemas.MYSQL {
convertFunc = convertString
}
if _, err := w.WriteString(convertArg(arg, convertFunc)); err != nil {
return err
}
}
}
return nil
}
// WriteArgs writes args
func (statement *Statement) WriteArgs(w *builder.BytesWriter, args []interface{}) error {
for i, arg := range args {
if err := statement.WriteArg(w, arg); err != nil {
return err
}
if i+1 != len(args) {
if _, err := w.WriteString(","); err != nil {
return err
}
}
}
return nil
}