if...

L1::: Copyright 2012 The Go Authors. All rights reserved.
L2::: Use of this source code is governed by a BSD-style
L3::: license that can be found in the LICENSE file.
L4:
L5:@echo off
L6:
L7:setlocal
L8:
L9:set GOBUILDFAIL=0
L10:
L11:go tool dist env -w -p >env.bat
L12:if errorlevel 1 goto fail
L13:call .\env.bat
L14:del env.bat
L15:echo.
L16:
L17:if exist %GOTOOLDIR%\dist.exe goto distok
L18:echo cannot find %GOTOOLDIR%\dist; nothing to clean
L19:goto fail
L20::distok
L21:
...

	for _, growLen := range []int{0, 100, 1000, 10000, 100000} {
		for _, startLen := range []int{0, 100, 1000, 10000, 100000} {
			xBytes := Repeat(x, startLen)

			buf := NewBuffer(xBytes)
			// If we read, this affects buf.off, which is good to test.
			readBytes, _ := buf.Read(tmp)
			yBytes := Repeat(y, growLen)
			allocs := testing.AllocsPerRun(100, func() {
				buf.Grow(growLen)
				buf.Write(yBytes)
			})

		// don't spend all our time copying.
		copy(b.buf, b.buf[b.off:])
	} else if c > maxInt-c-n {
		panic(ErrTooLarge)
	} else {
		// Add b.off to account for b.buf[:b.off] being sliced off the front.
		b.buf = growSlice(b.buf[b.off:], b.off+n)
	}
	// Restore b.off and len(b.buf).
	b.off = 0
	b.buf = b.buf[:m+n]
	return m
}

pkg syscall (openbsd-386), func SendmsgN(int, []uint8, []uint8, Sockaddr, int) (int, error)
pkg syscall (openbsd-386), type Dirent struct, Fileno uint64
pkg syscall (openbsd-386), type Dirent struct, Off int64
pkg syscall (openbsd-386), type Dirent struct, X__d_padding [4]uint8
pkg syscall (openbsd-386), type FdSet struct, Bits [32]uint32
pkg syscall (openbsd-386), type Kevent_t struct, Data int64

	}
	buf := make([]byte, ss.Size())
	for off := int64(0); off < ss.Size(); off++ {
		for size := 1; size <= int(ss.Size()-off); size++ {
			readBuf := buf[:size]
			n, err := ss.ReadAt(readBuf, off)
			if off < ss.Size()-keep {
				if err != errDiscardedBytes {
					t.Errorf("off %d, size %d = %v, %v (%q); want errDiscardedBytes", off, size, n, err, readBuf[:n])
				}
				continue
			}

	r := NewReader([]byte("0123456789"))
	tests := []struct {
		off     int64
		seek    int
		n       int
		want    string
		wantpos int64
		readerr error
		seekerr string
	}{
		{seek: io.SeekStart, off: 0, n: 20, want: "0123456789"},
		{seek: io.SeekStart, off: 1, n: 1, want: "1"},
		{seek: io.SeekCurrent, off: 1, wantpos: 3, n: 2, want: "34"},
		{seek: io.SeekStart, off: -1, seekerr: "bytes.Reader.Seek: negative position"},

	return
}

// ReadAt implements the [io.ReaderAt] interface.
func (r *Reader) ReadAt(b []byte, off int64) (n int, err error) {
	// cannot modify state - see io.ReaderAt
	if off < 0 {
		return 0, errors.New("bytes.Reader.ReadAt: negative offset")
	}
	if off >= int64(len(r.s)) {
		return 0, io.EOF
	}
	n = copy(b, r.s[off:])
	if n < len(b) {
		err = io.EOF
	}
	return
}

pkg syscall (freebsd-386), func Mknod(string, uint32, uint64) error
pkg syscall (freebsd-386), type Dirent struct, Fileno uint64
pkg syscall (freebsd-386), type Dirent struct, Namlen uint16
pkg syscall (freebsd-386), type Dirent struct, Off int64
pkg syscall (freebsd-386), type Dirent struct, Pad0 uint8
pkg syscall (freebsd-386), type Dirent struct, Pad1 uint16
pkg syscall (freebsd-386), type Stat_t struct, Atim_ext int32

	if _, err := io.ReadFull(r, buf[:4]); err != nil {
		return err
	}
	off := 0
	maybeSig := readBuf(buf[:4])
	if maybeSig.uint32() != dataDescriptorSignature {
		// No data descriptor signature. Keep these four
		// bytes.
		off += 4
	}
	if _, err := io.ReadFull(r, buf[off:12]); err != nil {
		return err
	}
	b := readBuf(buf[:12])
	if b.uint32() != f.CRC32 {