Import to pgx main repo in pgtype subdir

2021-12-04 13:07:54 -06:00
parent 550cc7b529
commit 44214b7854
237 changed files with 0 additions and 0 deletions
@@ -0,0 +1,146 @@
+package pgtype
+
+import (
+	"database/sql/driver"
+	"encoding/hex"
+	"fmt"
+)
+
+type Bytea struct {
+	Bytes []byte
+	Valid bool
+}
+
+func (dst *Bytea) Set(src interface{}) error {
+	if src == nil {
+		*dst = Bytea{}
+		return nil
+	}
+
+	if value, ok := src.(interface{ Get() interface{} }); ok {
+		value2 := value.Get()
+		if value2 != value {
+			return dst.Set(value2)
+		}
+	}
+
+	switch value := src.(type) {
+	case []byte:
+		if value != nil {
+			*dst = Bytea{Bytes: value, Valid: true}
+		} else {
+			*dst = Bytea{}
+		}
+	default:
+		if originalSrc, ok := underlyingBytesType(src); ok {
+			return dst.Set(originalSrc)
+		}
+		return fmt.Errorf("cannot convert %v to Bytea", value)
+	}
+
+	return nil
+}
+
+func (dst Bytea) Get() interface{} {
+	if !dst.Valid {
+		return nil
+	}
+	return dst.Bytes
+}
+
+func (src *Bytea) AssignTo(dst interface{}) error {
+	if !src.Valid {
+		return NullAssignTo(dst)
+	}
+
+	switch v := dst.(type) {
+	case *[]byte:
+		buf := make([]byte, len(src.Bytes))
+		copy(buf, src.Bytes)
+		*v = buf
+		return nil
+	default:
+		if nextDst, retry := GetAssignToDstType(dst); retry {
+			return src.AssignTo(nextDst)
+		}
+		return fmt.Errorf("unable to assign to %T", dst)
+	}
+}
+
+// DecodeText only supports the hex format. This has been the default since
+// PostgreSQL 9.0.
+func (dst *Bytea) DecodeText(ci *ConnInfo, src []byte) error {
+	if src == nil {
+		*dst = Bytea{}
+		return nil
+	}
+
+	if len(src) < 2 || src[0] != '\\' || src[1] != 'x' {
+		return fmt.Errorf("invalid hex format")
+	}
+
+	buf := make([]byte, (len(src)-2)/2)
+	_, err := hex.Decode(buf, src[2:])
+	if err != nil {
+		return err
+	}
+
+	*dst = Bytea{Bytes: buf, Valid: true}
+	return nil
+}
+
+func (dst *Bytea) DecodeBinary(ci *ConnInfo, src []byte) error {
+	if src == nil {
+		*dst = Bytea{}
+		return nil
+	}
+
+	*dst = Bytea{Bytes: src, Valid: true}
+	return nil
+}
+
+func (src Bytea) EncodeText(ci *ConnInfo, buf []byte) ([]byte, error) {
+	if !src.Valid {
+		return nil, nil
+	}
+
+	buf = append(buf, `\x`...)
+	buf = append(buf, hex.EncodeToString(src.Bytes)...)
+	return buf, nil
+}
+
+func (src Bytea) EncodeBinary(ci *ConnInfo, buf []byte) ([]byte, error) {
+	if !src.Valid {
+		return nil, nil
+	}
+
+	return append(buf, src.Bytes...), nil
+}
+
+// Scan implements the database/sql Scanner interface.
+func (dst *Bytea) Scan(src interface{}) error {
+	if src == nil {
+		*dst = Bytea{}
+		return nil
+	}
+
+	switch src := src.(type) {
+	case string:
+		return dst.DecodeText(nil, []byte(src))
+	case []byte:
+		buf := make([]byte, len(src))
+		copy(buf, src)
+		*dst = Bytea{Bytes: buf, Valid: true}
+		return nil
+	}
+
+	return fmt.Errorf("cannot scan %T", src)
+}
+
+// Value implements the database/sql/driver Valuer interface.
+func (src Bytea) Value() (driver.Value, error) {
+	if !src.Valid {
+		return nil, nil
+	}
+	return src.Bytes, nil
+}