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e654d1f0fc
To aid in composability, these methods no longer write their own length. This is especially useful for text formatted arrays and may be useful for future database/sql compatibility. It also makes the code a little simpler as the types no longer have to compute their own size. Along with this, these methods cannot encode NULL. They now return a boolean if they are NULL. This also benefits text array encoding as numeric arrays require NULL to be exactly `NULL` while string arrays require NULL to be `"NULL"`.
136 lines
3.0 KiB
Go
136 lines
3.0 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 Int4 struct {
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Int int32
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Status Status
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}
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func (dst *Int4) ConvertFrom(src interface{}) error {
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switch value := src.(type) {
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case Int4:
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*dst = value
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case int8:
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*dst = Int4{Int: int32(value), Status: Present}
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case uint8:
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*dst = Int4{Int: int32(value), Status: Present}
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case int16:
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*dst = Int4{Int: int32(value), Status: Present}
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case uint16:
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*dst = Int4{Int: int32(value), Status: Present}
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case int32:
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*dst = Int4{Int: int32(value), Status: Present}
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case uint32:
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if value > math.MaxInt32 {
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return fmt.Errorf("%d is greater than maximum value for Int4", value)
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}
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*dst = Int4{Int: int32(value), Status: Present}
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case int64:
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if value < math.MinInt32 {
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return fmt.Errorf("%d is greater than maximum value for Int4", value)
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}
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if value > math.MaxInt32 {
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return fmt.Errorf("%d is greater than maximum value for Int4", value)
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}
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*dst = Int4{Int: int32(value), Status: Present}
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case uint64:
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if value > math.MaxInt32 {
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return fmt.Errorf("%d is greater than maximum value for Int4", value)
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}
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*dst = Int4{Int: int32(value), Status: Present}
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case int:
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if value < math.MinInt32 {
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return fmt.Errorf("%d is greater than maximum value for Int4", value)
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}
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if value > math.MaxInt32 {
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return fmt.Errorf("%d is greater than maximum value for Int4", value)
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}
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*dst = Int4{Int: int32(value), Status: Present}
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case uint:
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if value > math.MaxInt32 {
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return fmt.Errorf("%d is greater than maximum value for Int4", value)
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}
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*dst = Int4{Int: int32(value), Status: Present}
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case string:
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num, err := strconv.ParseInt(value, 10, 32)
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if err != nil {
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return err
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}
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*dst = Int4{Int: int32(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 Int8", value)
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}
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return nil
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}
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func (src *Int4) 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 *Int4) DecodeText(src []byte) error {
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if src == nil {
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*dst = Int4{Status: Null}
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return nil
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}
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n, err := strconv.ParseInt(string(src), 10, 32)
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if err != nil {
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return err
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}
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*dst = Int4{Int: int32(n), Status: Present}
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return nil
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}
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func (dst *Int4) DecodeBinary(src []byte) error {
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if src == nil {
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*dst = Int4{Status: Null}
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return nil
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}
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if len(src) != 4 {
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return fmt.Errorf("invalid length for int4: %v", len(src))
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}
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n := int32(binary.BigEndian.Uint32(src))
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*dst = Int4{Int: n, Status: Present}
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return nil
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}
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func (src Int4) EncodeText(w io.Writer) (bool, error) {
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switch src.Status {
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case Null:
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return true, nil
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case Undefined:
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return false, errUndefined
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}
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_, err := io.WriteString(w, strconv.FormatInt(int64(src.Int), 10))
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return false, err
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}
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func (src Int4) EncodeBinary(w io.Writer) (bool, error) {
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switch src.Status {
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case Null:
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return true, nil
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case Undefined:
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return false, errUndefined
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}
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_, err := pgio.WriteInt32(w, src.Int)
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return false, err
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}
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