// so we leave it out. It should be covered via
		// the ReadSlice test since ReadLine simply calls
		// ReadSlice, and it's that function that handles
		// the last byte.
	}

	// Try all readers with UnreadByte.
	for rno, read := range readers {
		// Some input data that is longer than the minimum reader buffer size.
		const n = 10
		var buf bytes.Buffer
		for i := 0; i < n; i++ {

	}
}

// mangle replaces references to C names in arg with the mangled names,
// rewriting calls when it finds them.
// It removes the corresponding references in f.Ref and f.Calls, so that we
// don't try to do the replacement again in rewriteRef or rewriteCall.
// If addPosition is true, add position info to the idents of C names in arg.
func (p *Package) mangle(f *File, arg *ast.Expr, addPosition bool) (ast.Expr, bool) {

		for _, window := range windows {
			if window > len(b[i:]) {
				window = len(b[i:])
			}
			// Fill the window with non-match
			for j := 0; j < window; j++ {
				b[i+j] = byte(100)
			}
			// Try to find something that doesn't exist
			p := Count(b[i:i+window], []byte{0})
			if p != 0 {
				t.Errorf("TestCountByteNoMatch(%q, 0) = %d", b[i:i+window], p)
			}
			for j := 0; j < window; j++ {
				b[i+j] = byte(0)