}

void
callGoStackCheck(void)
{
	extern void goStackCheck(void);
	goStackCheck();
}

int
returnAfterGrow(void)
{
	extern int goReturnVal(void);
	goReturnVal();
	return 123456;
}

int
returnAfterGrowFromGo(void)
{
	extern int goReturnVal(void);
	return goReturnVal();
}

void
callGoWithString(void)
{
	extern void goWithString(GoString);

	PSTB R1, $1, 12345678(R2)               // 061000bc9822614e
	PSTD R1, $1, 12345678(R2)               // 041000bcf422614e
	PSTFD F1, $1, 12345678(R2)              // 061000bcd822614e
	PSTFS F1, $1, 123456789(R7)             // 0610075bd027cd15
	PSTH R1, $1, 12345678(R2)               // 061000bcb022614e
	PSTQ R2, $1, 12345678(R2)               // 041000bcf042614e
	PSTW R1, $1, 12345678(R2)               // 061000bc9022614e

	}
	if got, want := NewReaderSize(nil, 1234).Size(), 1234; got != want {
		t.Errorf("NewReaderSize's Reader.Size = %d; want %d", got, want)
	}
}

func TestWriterSize(t *testing.T) {
	if got, want := NewWriter(nil).Size(), DefaultBufSize; got != want {
		t.Errorf("NewWriter's Writer.Size = %d; want %d", got, want)
	}
	if got, want := NewWriterSize(nil, 1234).Size(), 1234; got != want {

// causes a stack copy.
func testReturnAfterGrow(t *testing.T) {
	// Use a new goroutine so that we get a small stack.
	c := make(chan int)
	go func() {
		c <- int(C.returnAfterGrow())
	}()
	if got, want := <-c, 123456; got != want {
		t.Errorf("got %d want %d", got, want)
	}
}

// Test that we can return a value from Go->C->Go if the Go code
// causes a stack copy.
func testReturnAfterGrowFromGo(t *testing.T) {

hex_exponent      = ( "p" | "P" ) [ "+" | "-" ] decimal_digits .
</pre>

<pre>
0.
72.40
072.40       // == 72.40
2.71828
1.e+0
6.67428e-11
1E6
.25
.12345E+5
1_5.         // == 15.0
0.15e+0_2    // == 15.0

0x1p-2       // == 0.25
0x2.p10      // == 2048.0
0x1.Fp+0     // == 1.9375
0X.8p-0      // == 0.5
0X_1FFFP-16  // == 0.1249847412109375

For example, if the directory `6-stdlib/99-minor` is present,
then an `api/next` file with the line

    pkg net/http, function F #12345

should have a corresponding file named `doc/next/6-stdlib/99-minor/net/http/12345.md`.
At a minimum, that file should contain either a full sentence or a TODO,
ideally referring to a person with the responsibility to complete the note.

	MOVD $-32768, R6                // 38c08000
	MOVD $1234567, R5               // 6405001260a5d687 or 0600001238a0d687
	MOVW $1, R3                     // 38600001
	MOVW $-1, R4                    // 3880ffff
	MOVW $65535, R5                 // 6005ffff
	MOVW $65536, R6                 // 3cc00001
	MOVW $-32767, R5                // 38a08001
	MOVW $-32768, R6                // 38c08000
	MOVW $1234567, R5               // 6405001260a5d687 or 0600001238a0d687

	MOVF	$8(SP), X5			// ERROR "unsupported address load"
	MOV	$1234, 0(SP)			// ERROR "constant load must target register"
	MOV	$1234, 8(SP)			// ERROR "constant load must target register"
	MOV	$0, 0(SP)			// ERROR "constant load must target register"
	MOV	$0, 8(SP)			// ERROR "constant load must target register"
	MOV	$1234, 0(SP)			// ERROR "constant load must target register"
	MOV	$1234, 8(SP)			// ERROR "constant load must target register"

type TitleTest struct {
	in, out string
}

var TitleTests = []TitleTest{
	{"", ""},
	{"a", "A"},
	{" aaa aaa aaa ", " Aaa Aaa Aaa "},
	{" Aaa Aaa Aaa ", " Aaa Aaa Aaa "},
	{"123a456", "123a456"},
	{"double-blind", "Double-Blind"},
	{"ÿøû", "Ÿøû"},
	{"with_underscore", "With_underscore"},
	{"unicode \xe2\x80\xa8 line separator", "Unicode \xe2\x80\xa8 Line Separator"},
}

		wantErr: ErrHeader,
	}, {
		input:    makeInput(FormatGNU, "1234", "fewa"),
		wantSize: 01234,
		wantErr:  ErrHeader,
	}, {
		input:    makeInput(FormatGNU, "0031"),
		wantSize: 031,
	}, {
		input:   makeInput(FormatGNU, "80"),
		wantErr: ErrHeader,
	}, {
		input: makeInput(FormatGNU, "1234",
			makeSparseStrings(sparseDatas{{0, 0}, {1, 1}})...),