for {
		header, err := tr.Next()
		if err == io.EOF {
			break
		}
		if err != nil {
			t.Fatalf("Failed to read header: %s", err)
		}
		if header.Typeflag != TypeReg {
			t.Fatalf("Typeflag should've been %d, found %d", TypeReg, header.Typeflag)
		}
	}
}

// failOnceWriter fails exactly once and then always reports success.
type failOnceWriter bool

pkg archive/zip, method (*File) OpenRaw() (io.Reader, error)
pkg archive/zip, method (*Writer) Copy(*File) error
pkg archive/zip, method (*Writer) CreateRaw(*FileHeader) (io.Writer, error)
pkg compress/lzw, method (*Reader) Close() error
pkg compress/lzw, method (*Reader) Read([]uint8) (int, error)
pkg compress/lzw, method (*Reader) Reset(io.Reader, Order, int)
pkg compress/lzw, method (*Writer) Close() error

pkg bytes, func ContainsAny([]uint8, string) bool
pkg bytes, func ContainsRune([]uint8, int32) bool
pkg bytes, method (*Reader) Reset([]uint8)
pkg compress/flate, const HuffmanOnly = -2
pkg compress/flate, const HuffmanOnly ideal-int
pkg context, func Background() Context
pkg context, func TODO() Context
pkg context, func WithCancel(Context) (Context, CancelFunc)
pkg context, func WithDeadline(Context, time.Time) (Context, CancelFunc)

// The Header.Size determines how many bytes can be written for the next file.
// If the current file is not fully written, then this returns an error.
// This implicitly flushes any padding necessary before writing the header.
func (tw *Writer) WriteHeader(hdr *Header) error {
	if err := tw.Flush(); err != nil {
		return err
	}
	tw.hdr = *hdr // Shallow copy of Header

// NewReaderSize returns a new [Reader] whose buffer has at least the specified
// size. If the argument io.Reader is already a [Reader] with large enough
// size, it returns the underlying [Reader].
func NewReaderSize(rd io.Reader, size int) *Reader {
	// Is it already a Reader?
	b, ok := rd.(*Reader)
	if ok && len(b.buf) >= size {
		return b
	}
	r := new(Reader)
	r.reset(make([]byte, max(size, minReadBufferSize)), rd)

	// Reference:
	//	http://pubs.opengroup.org/onlinepubs/9699919799/utilities/pax.html#tag_20_92_13_06
	FormatUSTAR

	// FormatPAX represents the PAX header format defined in POSIX.1-2001.
	//
	// PAX extends USTAR by writing a special file with Typeflag TypeXHeader
	// preceding the original header. This file contains a set of key-value
	// records, which are used to overcome USTAR's shortcomings, in addition to

pkg compress/flate, type Resetter interface, Reset(io.Reader, []uint8) error
pkg compress/zlib, type Resetter interface { Reset }
pkg compress/zlib, type Resetter interface, Reset(io.Reader, []uint8) error

# CL 159120044 compress/gzip: allow stopping at end of first stream, Russ Cox <******@****.***>
pkg compress/gzip, method (*Reader) Multistream(bool)

pkg archive/tar, type Format int
pkg archive/tar, type Header struct, Format Format
pkg archive/tar, type Header struct, PAXRecords map[string]string
pkg archive/zip, method (*Writer) SetComment(string) error
pkg archive/zip, type FileHeader struct, Modified time.Time
pkg archive/zip, type FileHeader struct, NonUTF8 bool
pkg bufio, method (*Reader) Size() int
pkg bufio, method (*Writer) Size() int

pkg mime, type WordDecoder struct
pkg mime, type WordDecoder struct, CharsetReader func(string, io.Reader) (io.Reader, error)
pkg mime, type WordEncoder uint8
pkg mime/quotedprintable, func NewReader(io.Reader) *Reader
pkg mime/quotedprintable, func NewWriter(io.Writer) *Writer
pkg mime/quotedprintable, method (*Reader) Read([]uint8) (int, error)
pkg mime/quotedprintable, method (*Writer) Close() error

The Go code can then refer to types such as C.size_t, variables such
as C.stdout, or functions such as C.putchar.

If the import of "C" is immediately preceded by a comment, that
comment, called the preamble, is used as a header when compiling
the C parts of the package. For example:

	// #include <stdio.h>
	// #include <errno.h>
	import "C"

The preamble may contain any C code, including function and variable