mirror of https://github.com/jackc/pgx.git
152 lines
3.0 KiB
Go
152 lines
3.0 KiB
Go
package pgtype
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import (
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"database/sql/driver"
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"encoding/binary"
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"fmt"
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"math"
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"strconv"
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"strings"
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"github.com/jackc/pgx/pgio"
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"github.com/pkg/errors"
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)
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type Circle struct {
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P Vec2
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R float64
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Status Status
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}
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func (dst *Circle) Set(src interface{}) error {
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return errors.Errorf("cannot convert %v to Circle", src)
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}
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func (dst *Circle) Get() interface{} {
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switch dst.Status {
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case Present:
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return dst
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case Null:
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return nil
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default:
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return dst.Status
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}
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}
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func (src *Circle) AssignTo(dst interface{}) error {
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return errors.Errorf("cannot assign %v to %T", src, dst)
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}
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func (dst *Circle) DecodeText(ci *ConnInfo, src []byte) error {
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if src == nil {
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*dst = Circle{Status: Null}
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return nil
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}
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if len(src) < 9 {
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return errors.Errorf("invalid length for Circle: %v", len(src))
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}
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str := string(src[2:])
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end := strings.IndexByte(str, ',')
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x, err := strconv.ParseFloat(str[:end], 64)
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if err != nil {
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return err
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}
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str = str[end+1:]
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end = strings.IndexByte(str, ')')
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y, err := strconv.ParseFloat(str[:end], 64)
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if err != nil {
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return err
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}
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str = str[end+2 : len(str)-1]
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r, err := strconv.ParseFloat(str, 64)
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if err != nil {
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return err
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}
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*dst = Circle{P: Vec2{x, y}, R: r, Status: Present}
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return nil
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}
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func (dst *Circle) DecodeBinary(ci *ConnInfo, src []byte) error {
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if src == nil {
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*dst = Circle{Status: Null}
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return nil
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}
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if len(src) != 24 {
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return errors.Errorf("invalid length for Circle: %v", len(src))
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}
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x := binary.BigEndian.Uint64(src)
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y := binary.BigEndian.Uint64(src[8:])
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r := binary.BigEndian.Uint64(src[16:])
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*dst = Circle{
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P: Vec2{math.Float64frombits(x), math.Float64frombits(y)},
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R: math.Float64frombits(r),
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Status: Present,
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}
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return nil
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}
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func (src *Circle) EncodeText(ci *ConnInfo, buf []byte) ([]byte, error) {
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switch src.Status {
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case Null:
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return nil, nil
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case Undefined:
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return nil, errUndefined
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}
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buf = append(buf, fmt.Sprintf(`<(%s,%s),%s>`,
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strconv.FormatFloat(src.P.X, 'f', -1, 64),
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strconv.FormatFloat(src.P.Y, 'f', -1, 64),
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strconv.FormatFloat(src.R, 'f', -1, 64),
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)...)
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return buf, nil
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}
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func (src *Circle) EncodeBinary(ci *ConnInfo, buf []byte) ([]byte, error) {
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switch src.Status {
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case Null:
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return nil, nil
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case Undefined:
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return nil, errUndefined
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}
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buf = pgio.AppendUint64(buf, math.Float64bits(src.P.X))
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buf = pgio.AppendUint64(buf, math.Float64bits(src.P.Y))
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buf = pgio.AppendUint64(buf, math.Float64bits(src.R))
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return buf, nil
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}
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// Scan implements the database/sql Scanner interface.
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func (dst *Circle) Scan(src interface{}) error {
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if src == nil {
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*dst = Circle{Status: Null}
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return nil
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}
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switch src := src.(type) {
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case string:
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return dst.DecodeText(nil, []byte(src))
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case []byte:
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srcCopy := make([]byte, len(src))
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copy(srcCopy, src)
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return dst.DecodeText(nil, srcCopy)
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}
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return errors.Errorf("cannot scan %T", src)
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}
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// Value implements the database/sql/driver Valuer interface.
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func (src *Circle) Value() (driver.Value, error) {
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return EncodeValueText(src)
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}
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