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append_value.go
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append_value.go
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package chschema
import (
"database/sql/driver"
"fmt"
"net"
"reflect"
"strconv"
"time"
"github.com/uptrace/go-clickhouse/ch/internal"
)
var (
driverValuerType = reflect.TypeOf((*driver.Valuer)(nil)).Elem()
queryAppenderType = reflect.TypeOf((*QueryAppender)(nil)).Elem()
)
type AppenderFunc func(fmter Formatter, b []byte, v reflect.Value) []byte
var valueAppenders []AppenderFunc
//nolint
func init() {
valueAppenders = []AppenderFunc{
reflect.Bool: appendBoolValue,
reflect.Int: appendIntValue,
reflect.Int8: appendIntValue,
reflect.Int16: appendIntValue,
reflect.Int32: appendIntValue,
reflect.Int64: appendIntValue,
reflect.Uint: appendUintValue,
reflect.Uint8: appendUintValue,
reflect.Uint16: appendUintValue,
reflect.Uint32: appendUintValue,
reflect.Uint64: appendUintValue,
reflect.Uintptr: nil,
reflect.Float32: appendFloat32Value,
reflect.Float64: appendFloat64Value,
reflect.Complex64: nil,
reflect.Complex128: nil,
reflect.Array: nil,
reflect.Chan: nil,
reflect.Func: nil,
reflect.Interface: appendIfaceValue,
reflect.Map: nil,
reflect.Ptr: nil,
reflect.Slice: nil,
reflect.String: appendStringValue,
reflect.Struct: nil,
reflect.UnsafePointer: nil,
}
}
func Appender(typ reflect.Type) AppenderFunc {
switch typ {
case timeType:
return appendTimeValue
case ipType:
return appendIPValue
case ipNetType:
return appendIPNetValue
}
if typ.Implements(queryAppenderType) {
return appendQueryAppenderValue
}
if typ.Implements(driverValuerType) {
return appendDriverValuerValue
}
kind := typ.Kind()
if kind != reflect.Ptr {
ptr := reflect.PtrTo(typ)
if ptr.Implements(queryAppenderType) {
return addrAppender(appendQueryAppenderValue)
}
if ptr.Implements(driverValuerType) {
return addrAppender(appendDriverValuerValue)
}
}
switch kind {
case reflect.Ptr:
return ptrAppenderFunc(typ)
case reflect.Slice:
if typ.Elem().Kind() == reflect.Uint8 {
return appendBytesValue
}
case reflect.Array:
if typ.Elem().Kind() == reflect.Uint8 {
return appendArrayBytesValue
}
}
return valueAppenders[kind]
}
func ptrAppenderFunc(typ reflect.Type) AppenderFunc {
appender := Appender(typ.Elem())
return func(fmter Formatter, b []byte, v reflect.Value) []byte {
if v.IsNil() {
return AppendNull(b)
}
return appender(fmter, b, v.Elem())
}
}
func AppendValue(fmter Formatter, b []byte, v reflect.Value) []byte {
if v.Kind() == reflect.Ptr && v.IsNil() {
return AppendNull(b)
}
appender := Appender(v.Type())
return appender(fmter, b, v)
}
func appendIfaceValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return Append(fmter, b, v.Interface())
}
func appendBoolValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return AppendBool(b, v.Bool())
}
func appendIntValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return strconv.AppendInt(b, v.Int(), 10)
}
func appendUintValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return strconv.AppendUint(b, v.Uint(), 10)
}
func appendFloat32Value(fmter Formatter, b []byte, v reflect.Value) []byte {
return appendFloat(b, v.Float(), 32)
}
func appendFloat64Value(fmter Formatter, b []byte, v reflect.Value) []byte {
return appendFloat(b, v.Float(), 64)
}
func appendBytesValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return AppendBytes(b, v.Bytes())
}
func appendArrayBytesValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return AppendBytes(b, v.Slice(0, v.Len()).Bytes())
}
func appendStringValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return AppendString(b, v.String())
}
func appendTimeValue(fmter Formatter, b []byte, v reflect.Value) []byte {
tm := v.Interface().(time.Time)
return AppendTime(b, tm)
}
func appendIPValue(fmter Formatter, b []byte, v reflect.Value) []byte {
ip := v.Interface().(net.IP)
return AppendString(b, ip.String())
}
func appendIPNetValue(fmter Formatter, b []byte, v reflect.Value) []byte {
ipnet := v.Interface().(net.IPNet)
return AppendString(b, ipnet.String())
}
func appendJSONRawMessageValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return AppendString(b, internal.String(v.Bytes()))
}
func appendQueryAppenderValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return AppendQueryAppender(fmter, b, v.Interface().(QueryAppender))
}
func appendDriverValuerValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return appendDriverValue(fmter, b, v.Interface().(driver.Valuer))
}
func addrAppender(fn AppenderFunc) AppenderFunc {
return func(fmter Formatter, b []byte, v reflect.Value) []byte {
if !v.CanAddr() {
err := fmt.Errorf("ch: Append(nonaddressable %T)", v.Interface())
return AppendError(b, err)
}
return fn(fmter, b, v.Addr())
}
}
func AppendQueryAppender(fmter Formatter, b []byte, app QueryAppender) []byte {
bb, err := app.AppendQuery(fmter, b)
if err != nil {
return AppendError(b, err)
}
return bb
}
func appendDriverValue(fmter Formatter, b []byte, v driver.Valuer) []byte {
value, err := v.Value()
if err != nil {
return AppendError(b, err)
}
return Append(fmter, b, value)
}