mirror of https://github.com/jackc/pgx.git
150 lines
3.0 KiB
Go
150 lines
3.0 KiB
Go
package pgtype
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"math"
|
|
"strconv"
|
|
|
|
"github.com/jackc/pgx/pgio"
|
|
)
|
|
|
|
type Int8 struct {
|
|
Int int64
|
|
Status Status
|
|
}
|
|
|
|
func (dst *Int8) ConvertFrom(src interface{}) error {
|
|
switch value := src.(type) {
|
|
case Int8:
|
|
*dst = value
|
|
case int8:
|
|
*dst = Int8{Int: int64(value), Status: Present}
|
|
case uint8:
|
|
*dst = Int8{Int: int64(value), Status: Present}
|
|
case int16:
|
|
*dst = Int8{Int: int64(value), Status: Present}
|
|
case uint16:
|
|
*dst = Int8{Int: int64(value), Status: Present}
|
|
case int32:
|
|
*dst = Int8{Int: int64(value), Status: Present}
|
|
case uint32:
|
|
*dst = Int8{Int: int64(value), Status: Present}
|
|
case int64:
|
|
*dst = Int8{Int: int64(value), Status: Present}
|
|
case uint64:
|
|
if value > math.MaxInt64 {
|
|
return fmt.Errorf("%d is greater than maximum value for Int8", value)
|
|
}
|
|
*dst = Int8{Int: int64(value), Status: Present}
|
|
case int:
|
|
if int64(value) < math.MinInt64 {
|
|
return fmt.Errorf("%d is greater than maximum value for Int8", value)
|
|
}
|
|
if int64(value) > math.MaxInt64 {
|
|
return fmt.Errorf("%d is greater than maximum value for Int8", value)
|
|
}
|
|
*dst = Int8{Int: int64(value), Status: Present}
|
|
case uint:
|
|
if uint64(value) > math.MaxInt64 {
|
|
return fmt.Errorf("%d is greater than maximum value for Int8", value)
|
|
}
|
|
*dst = Int8{Int: int64(value), Status: Present}
|
|
case string:
|
|
num, err := strconv.ParseInt(value, 10, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
*dst = Int8{Int: num, Status: Present}
|
|
default:
|
|
if originalSrc, ok := underlyingNumberType(src); ok {
|
|
return dst.ConvertFrom(originalSrc)
|
|
}
|
|
return fmt.Errorf("cannot convert %v to Int8", value)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (src *Int8) AssignTo(dst interface{}) error {
|
|
return int64AssignTo(int64(src.Int), src.Status, dst)
|
|
}
|
|
|
|
func (dst *Int8) DecodeText(r io.Reader) error {
|
|
size, err := pgio.ReadInt32(r)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if size == -1 {
|
|
*dst = Int8{Status: Null}
|
|
return nil
|
|
}
|
|
|
|
buf := make([]byte, int(size))
|
|
_, err = r.Read(buf)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
n, err := strconv.ParseInt(string(buf), 10, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
*dst = Int8{Int: n, Status: Present}
|
|
return nil
|
|
}
|
|
|
|
func (dst *Int8) DecodeBinary(r io.Reader) error {
|
|
size, err := pgio.ReadInt32(r)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if size == -1 {
|
|
*dst = Int8{Status: Null}
|
|
return nil
|
|
}
|
|
|
|
if size != 8 {
|
|
return fmt.Errorf("invalid length for int8: %v", size)
|
|
}
|
|
|
|
n, err := pgio.ReadInt64(r)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
*dst = Int8{Int: n, Status: Present}
|
|
return nil
|
|
}
|
|
|
|
func (src Int8) EncodeText(w io.Writer) error {
|
|
if done, err := encodeNotPresent(w, src.Status); done {
|
|
return err
|
|
}
|
|
|
|
s := strconv.FormatInt(src.Int, 10)
|
|
_, err := pgio.WriteInt32(w, int32(len(s)))
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
_, err = w.Write([]byte(s))
|
|
return err
|
|
}
|
|
|
|
func (src Int8) EncodeBinary(w io.Writer) error {
|
|
if done, err := encodeNotPresent(w, src.Status); done {
|
|
return err
|
|
}
|
|
|
|
_, err := pgio.WriteInt32(w, 8)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = pgio.WriteInt64(w, src.Int)
|
|
return err
|
|
}
|