func TestEqualFold(t *testing.T) {
	for _, tt := range EqualFoldTests {
		if out := EqualFold([]byte(tt.s), []byte(tt.t)); out != tt.out {
			t.Errorf("EqualFold(%#q, %#q) = %v, want %v", tt.s, tt.t, out, tt.out)
		}
		if out := EqualFold([]byte(tt.t), []byte(tt.s)); out != tt.out {
			t.Errorf("EqualFold(%#q, %#q) = %v, want %v", tt.t, tt.s, out, tt.out)
		}
	}
}

var cutTests = []struct {
	s, sep        string

			}, nil},
			testWrite{"", 0, nil},

			testClose{nil},
		},
	}, {
		// The truncated test file was produced using these commands:
		//   dd if=/dev/zero bs=1048576 count=16384 > /tmp/16gig.txt
		//   tar -b 1 -c -f- /tmp/16gig.txt | dd bs=512 count=8 > writer-big.tar
		file: "testdata/writer-big.tar",
		tests: []testFnc{
			testHeader{Header{
				Typeflag: TypeReg,
				Name:     "tmp/16gig.txt",
				Size:     16 << 30,

		cmd.Env = append(cmd.Environ(),
			"CGO_CFLAGS="+cflags,
			"CGO_CXXFLAGS="+cflags,
			"CGO_LDFLAGS="+cflags+extraLDFlags)
	}
	out, err := cmd.CombinedOutput()
	if string(out) != "OK\n" {
		t.Errorf("%s", string(out))
	}
	if err != nil {
		t.Errorf("%s", err)
	}
}

func mustHaveCxx(t *testing.T) {
	// Ask the go tool for the CXX it's configured to use.

			t.Go = c.Opaque(t.Size)
			break
		}
		count := dt.Count
		if count == -1 {
			// Indicates flexible array member, which Go doesn't support.
			// Translate to zero-length array instead.
			count = 0
		}
		sub := c.Type(dt.Type, pos)
		t.Align = sub.Align
		t.Go = &ast.ArrayType{
			Len: c.intExpr(count),
			Elt: sub.Go,
		}

but instead calls a Go helper function that wraps the C library malloc
but guarantees never to return nil. If C's malloc indicates out of memory,
the helper function crashes the program, like when Go itself runs out
of memory. Because C.malloc cannot fail, it has no two-result form
that returns errno.

# C references to Go

	}
	return nil
}

type (
	stringFormatter func([]byte, string)
	numberFormatter func([]byte, int64)
)

// templateV7Plus fills out the V7 fields of a block using values from hdr.
// It also fills out fields (uname, gname, devmajor, devminor) that are
// shared in the USTAR, PAX, and GNU formats using the provided formatters.
//
// The block returned is only valid until the next call to

		switch err := recover().(type) {
		case nil:
			t.Fatal("bytes.Buffer.ReadFrom didn't panic")
		case error:
			// this is the error string of errNegativeRead
			wantError := "bytes.Buffer: reader returned negative count from Read"
			if err.Error() != wantError {
				t.Fatalf("recovered panic: got %v, want %v", err.Error(), wantError)
			}
		default:
			t.Fatalf("unexpected panic value: %#v", err)
		}
	}()

		if p.arch.Family == sys.ARM64 {
			if x >= 64 {
				p.errorf("register shift count too large: %s", str)
			}
			count = int16((x & 63) << 10)
		} else {
			if x >= 32 {
				p.errorf("register shift count too large: %s", str)
			}
			count = int16((x & 31) << 7)
		}
	default:
		p.errorf("unexpected %s in register shift", tok.String())
	}
	if p.arch.Family == sys.ARM64 {

// issue 3261

func testLibgcc(t *testing.T) {
	var table = []struct {
		in, out C.int
	}{
		{0, 0},
		{1, 1},
		{-42, 42},
		{1000300, 1000300},
		{1 - 1<<31, 1<<31 - 1},
	}
	for _, v := range table {
		if o := C.vabs(v.in); o != v.out {
			t.Fatalf("abs(%d) got %d, should be %d", v.in, o, v.out)
			return
		}
	}
}

// issue 3729

		}
	}

	if t.Failed() {
		t.Logf("actual output:\n%s", out)
	}
}

func sizeofLongDouble(t *testing.T) int {
	testenv.MustHaveGoRun(t)
	testenv.MustHaveCGO(t)
	cmd := exec.Command("go", "run", path("long_double_size.go"))
	out, err := cmd.CombinedOutput()
	if err != nil {
		t.Fatalf("%#q: %v:\n%s", strings.Join(cmd.Args, " "), err, out)
	}

	i, err := strconv.Atoi(strings.TrimSpace(string(out)))