64 lines
1.3 KiB
Go
64 lines
1.3 KiB
Go
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package pgx
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import (
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"errors"
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"github.com/jackc/pgx/v5/internal/pgio"
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"github.com/jackc/pgx/v5/pgtype"
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)
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// PostgreSQL format codes
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const (
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TextFormatCode = 0
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BinaryFormatCode = 1
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)
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func convertSimpleArgument(m *pgtype.Map, arg any) (any, error) {
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buf, err := m.Encode(0, TextFormatCode, arg, []byte{})
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if err != nil {
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return nil, err
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}
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if buf == nil {
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return nil, nil
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}
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return string(buf), nil
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}
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func encodeCopyValue(m *pgtype.Map, buf []byte, oid uint32, arg any) ([]byte, error) {
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sp := len(buf)
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buf = pgio.AppendInt32(buf, -1)
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argBuf, err := m.Encode(oid, BinaryFormatCode, arg, buf)
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if err != nil {
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if argBuf2, err2 := tryScanStringCopyValueThenEncode(m, buf, oid, arg); err2 == nil {
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argBuf = argBuf2
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} else {
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return nil, err
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}
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}
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if argBuf != nil {
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buf = argBuf
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pgio.SetInt32(buf[sp:], int32(len(buf[sp:])-4))
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}
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return buf, nil
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}
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func tryScanStringCopyValueThenEncode(m *pgtype.Map, buf []byte, oid uint32, arg any) ([]byte, error) {
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s, ok := arg.(string)
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if !ok {
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textBuf, err := m.Encode(oid, TextFormatCode, arg, nil)
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if err != nil {
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return nil, errors.New("not a string and cannot be encoded as text")
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}
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s = string(textBuf)
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}
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var v any
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err := m.Scan(oid, TextFormatCode, []byte(s), &v)
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if err != nil {
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return nil, err
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}
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return m.Encode(oid, BinaryFormatCode, v, buf)
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}
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