// This fix finds nils initializing these types and replaces the nils with 0s.
func cftypefix(f *ast.File) bool {
	return typefix(f, func(s string) bool {
		return strings.HasPrefix(s, "C.") && strings.HasSuffix(s, "Ref") && s != "C.CFAllocatorRef"
	})
}

// typefix replaces nil with 0 for all nils whose type, when passed to badType, returns true.
func typefix(f *ast.File, badType func(string) bool) bool {
	if !imports(f, "C") {
		return false

// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

func init() {
	addTestCases(cftypeTests, cftypefix)
}

var cftypeTests = []testCase{
	{
		Name: "cftype.localVariable",
		In: `package main

// typedef const void *CFTypeRef;
import "C"

func f() {
	var x C.CFTypeRef = nil
	x = nil

//
//	type EGLDisplay unsafe.Pointer
//
// New state:
//
//	type EGLDisplay uintptr
//
// This fix finds nils initializing these types and replaces the nils with 0s.
func eglfixDisp(f *ast.File) bool {
	return typefix(f, func(s string) bool {
		return s == "C.EGLDisplay"
	})
}

var eglFixConfig = fix{
	name:     "eglconf",
	date:     "2020-05-30",
	f:        eglfixConfig,
	desc:     `Fixes initializers of EGLConfig`,

//
// New state:
//
//	type jobject uintptr
//
// and similar for subtypes of jobject.
// This fix finds nils initializing these types and replaces the nils with 0s.
func jnifix(f *ast.File) bool {
	return typefix(f, func(s string) bool {
		switch s {
		case "C.jobject":
			return true
		case "C.jclass":
			return true
		case "C.jthrowable":
			return true
		case "C.jstring":
			return true
		case "C.jarray":

		if e.Tag != dwarf.TagCompileUnit {
			r.SkipChildren()
		}
	}

	// Record types and typedef information.
	for i, n := range names {
		if strings.HasSuffix(n.Go, "GetTypeID") && types[i].String() == "func() CFTypeID" {
			conv.getTypeIDs[n.Go[:len(n.Go)-9]] = true
		}
	}
	for i, n := range names {
		if types[i] == nil {
			continue
		}
		pos := f.NamePos[n]
		f, fok := types[i].(*dwarf.FuncType)