mirror of https://github.com/jackc/pgx.git
149 lines
3.4 KiB
Go
149 lines
3.4 KiB
Go
package pgtype
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import (
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"encoding/binary"
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"fmt"
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"io"
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"math"
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"strconv"
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"github.com/jackc/pgx/pgio"
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)
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type Int2 struct {
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Int int16
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Status Status
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}
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func (dst *Int2) ConvertFrom(src interface{}) error {
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switch value := src.(type) {
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case Int2:
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*dst = value
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case int8:
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*dst = Int2{Int: int16(value), Status: Present}
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case uint8:
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*dst = Int2{Int: int16(value), Status: Present}
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case int16:
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*dst = Int2{Int: int16(value), Status: Present}
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case uint16:
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if value > math.MaxInt16 {
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return fmt.Errorf("%d is greater than maximum value for Int2", value)
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}
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*dst = Int2{Int: int16(value), Status: Present}
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case int32:
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if value < math.MinInt16 {
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return fmt.Errorf("%d is greater than maximum value for Int2", value)
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}
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if value > math.MaxInt16 {
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return fmt.Errorf("%d is greater than maximum value for Int2", value)
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}
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*dst = Int2{Int: int16(value), Status: Present}
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case uint32:
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if value > math.MaxInt16 {
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return fmt.Errorf("%d is greater than maximum value for Int2", value)
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}
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*dst = Int2{Int: int16(value), Status: Present}
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case int64:
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if value < math.MinInt16 {
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return fmt.Errorf("%d is greater than maximum value for Int2", value)
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}
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if value > math.MaxInt16 {
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return fmt.Errorf("%d is greater than maximum value for Int2", value)
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}
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*dst = Int2{Int: int16(value), Status: Present}
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case uint64:
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if value > math.MaxInt16 {
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return fmt.Errorf("%d is greater than maximum value for Int2", value)
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}
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*dst = Int2{Int: int16(value), Status: Present}
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case int:
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if value < math.MinInt16 {
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return fmt.Errorf("%d is greater than maximum value for Int2", value)
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}
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if value > math.MaxInt16 {
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return fmt.Errorf("%d is greater than maximum value for Int2", value)
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}
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*dst = Int2{Int: int16(value), Status: Present}
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case uint:
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if value > math.MaxInt16 {
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return fmt.Errorf("%d is greater than maximum value for Int2", value)
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}
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*dst = Int2{Int: int16(value), Status: Present}
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case string:
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num, err := strconv.ParseInt(value, 10, 16)
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if err != nil {
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return err
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}
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*dst = Int2{Int: int16(num), Status: Present}
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default:
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if originalSrc, ok := underlyingNumberType(src); ok {
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return dst.ConvertFrom(originalSrc)
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}
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return fmt.Errorf("cannot convert %v to Int2", value)
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}
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return nil
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}
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func (src *Int2) AssignTo(dst interface{}) error {
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return int64AssignTo(int64(src.Int), src.Status, dst)
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}
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func (dst *Int2) DecodeText(src []byte) error {
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if src == nil {
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*dst = Int2{Status: Null}
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return nil
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}
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n, err := strconv.ParseInt(string(src), 10, 16)
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if err != nil {
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return err
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}
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*dst = Int2{Int: int16(n), Status: Present}
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return nil
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}
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func (dst *Int2) DecodeBinary(src []byte) error {
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if src == nil {
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*dst = Int2{Status: Null}
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return nil
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}
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if len(src) != 2 {
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return fmt.Errorf("invalid length for int2: %v", len(src))
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}
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n := int16(binary.BigEndian.Uint16(src))
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*dst = Int2{Int: n, Status: Present}
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return nil
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}
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func (src Int2) EncodeText(w io.Writer) error {
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if done, err := encodeNotPresent(w, src.Status); done {
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return err
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}
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s := strconv.FormatInt(int64(src.Int), 10)
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_, err := pgio.WriteInt32(w, int32(len(s)))
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if err != nil {
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return nil
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}
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_, err = w.Write([]byte(s))
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return err
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}
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func (src Int2) EncodeBinary(w io.Writer) error {
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if done, err := encodeNotPresent(w, src.Status); done {
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return err
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}
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_, err := pgio.WriteInt32(w, 2)
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if err != nil {
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return err
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}
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_, err = pgio.WriteInt16(w, src.Int)
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return err
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}
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