Function UnsafeConvertStringToBytes

postgres/parser/encoding/encoding.go:452–465

UnsafeConvertStringToBytes converts a string to a byte array to be used with string encoding functions. Note that the output byte array should not be modified if the input string is expected to be used again - doing so could violate Go semantics.

(s string)

// modified if the input string is expected to be used again - doing so could
// violate Go semantics.
func UnsafeConvertStringToBytes(s string) []byte {
	if len(s) == 0 {
		return nil
	}
	// We unsafely convert the string to a []byte to avoid the
	// usual allocation when converting to a []byte. This is
	// kosher because we know that EncodeBytes{,Descending} does
	// not keep a reference to the value it encodes. The first
	// step is getting access to the string internals.
	data := unsafe.StringData(s)
	// Next we treat the string data as a maximally sized array which we
	// slice. This usage is safe because the pointer value remains in the string.
	return (*[0x7fffffff]byte)(unsafe.Pointer(data))[:len(s):len(s)]
}

// EncodeStringAscending encodes the string value using an escape-based encoding. See
// EncodeBytes for details. The encoded bytes are append to the supplied buffer