505 lines
11 KiB
Go
505 lines
11 KiB
Go
package wrap
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import (
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"fmt"
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"os"
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"path"
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"strconv"
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"strings"
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"gitlab.wow.st/gmp/nswrap/ast"
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"gitlab.wow.st/gmp/nswrap/types"
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)
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var (
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Debug = false
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)
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type Wrapper struct {
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Package string
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Interfaces map[string]Interface
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cCode strings.Builder // put cGo code here
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goTypes strings.Builder // put Go type declarations here
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goCode strings.Builder // put Go code here
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goHelpers strings.Builder // put Go helper functions here
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Processed map[string]bool
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VaArgs int
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}
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func NewWrapper(debug bool) *Wrapper {
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Debug = debug
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if Debug { fmt.Println("// Debug mode") }
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ret := &Wrapper{
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Interfaces: map[string]Interface{},
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Processed: map[string]bool{},
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VaArgs: 16,
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}
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ret.cCode.WriteString(`/*
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#cgo CFLAGS: -x objective-c
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#cgo LDFLAGS: -framework Foundation
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`)
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ret.goTypes.WriteString(`
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type Id struct { }
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func (o *Id) Ptr() unsafe.Pointer { return unsafe.Pointer(o) }
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`)
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return ret
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}
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func (w *Wrapper) Import(ss []string) {
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for _,s := range ss {
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w.cCode.WriteString(`
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#import "` + s + `"
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`)
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}
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}
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func (w *Wrapper) SysImport(ss []string) {
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for _,s := range ss {
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w.cCode.WriteString("\n#import <" + s + ">\n")
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}
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}
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func (w *Wrapper) Pragma(ss []string) {
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for _,s := range ss {
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w.cCode.WriteString("\n#pragma " + s + "\n")
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}
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}
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type Property struct {
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Name, Attr string
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Type *types.Type
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}
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type Parameter struct {
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Pname, Vname string
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Type *types.Type
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}
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type Method struct {
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Name, Class string
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Type *types.Type
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ClassMethod bool
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Parameters []Parameter
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}
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//isVoid() returns true if the method has no return value.
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func (m Method) isVoid() bool {
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return m.Type.CType() == "void"
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}
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//hasFunctionParam() returns true if a method has a function as a parameter.
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func (m Method) hasFunctionParam() bool {
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for _,p := range m.Parameters {
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if p.Type.IsFunction() {
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return true
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}
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}
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return false
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}
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func (w Wrapper) cparamlist(m Method) string {
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ret := make([]string,0)
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if !m.ClassMethod {
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ret = append(ret,"void* obj")
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}
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for _,p := range m.Parameters {
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var tp string
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if p.Type.Node.IsPointer() || p.Type.Variadic {
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tp = "void*"
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} else {
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tp = p.Type.CType()
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}
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ret = append(ret,fmt.Sprintf("%s %s",tp,p.Vname))
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}
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return strings.Join(ret,", ")
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}
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func (w Wrapper) objcparamlist(m Method) string {
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if len(m.Parameters) == 0 {
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return m.Name
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}
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first := true
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ret := []string{}
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for _,p := range m.Parameters {
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if first && !p.Type.Variadic {
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ret = append(ret,m.Name + ":" + p.Vname)
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first = false
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} else {
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if p.Type.Variadic {
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str := []string{m.Name + ":arr[0]"}
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for i := 1; i < w.VaArgs; i++ {
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str = append(str,"arr["+strconv.Itoa(i)+"]")
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}
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str = append(str,"nil")
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ret = append(ret, strings.Join(str,", "))
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} else {
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ret = append(ret, p.Pname + ":" + p.Vname)
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}
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}
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}
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return strings.Join(ret," ")
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}
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//goreserved is a map telling whether a word is a go reserved word that is not
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//also a C/Objective-C reserved word.
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var goreserved map[string]bool = map[string]bool{
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"range": true,
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}
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func (m *Method) gpntp() ([]string,[]*types.Type,string) {
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ns := []string{}
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tps := []*types.Type{}
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if !m.ClassMethod {
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ns = append(ns,"o")
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tps = append(tps,types.NewTypeFromString(m.Class + "*",""))
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}
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for _,p := range m.Parameters {
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gname := p.Vname
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if goreserved[gname] {
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gname = gname + "_"
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}
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ns = append(ns,gname)
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tps = append(tps,p.Type)
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}
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ret := []string{}
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i := 0
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if !m.ClassMethod { i = 1 }
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for ; i < len(ns); i++ {
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gt := tps[i].GoType()
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if gt == "*Void" {
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gt = "unsafe.Pointer"
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}
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if tps[i].Variadic {
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gt = "..." + gt
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ns[i] = ns[i] + "s"
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}
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ret = append(ret,ns[i] + " " + gt)
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}
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return ns, tps, strings.Join(ret,", ")
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}
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type Interface struct {
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Name string
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Properties map[string]Property
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Methods map[string]Method
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}
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func (w *Wrapper) AddInterface(n *ast.ObjCInterfaceDecl) {
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//fmt.Printf("ast.ObjCInterfaceDecl: %s\n",n.Name)
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w.add(n.Name, n.Children())
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}
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func (w *Wrapper) AddCategory(n *ast.ObjCCategoryDecl) {
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ns := n.Children()
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if len(ns) > 0 {
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switch x := ns[0].(type) {
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case *ast.ObjCInterface:
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w.add(x.Name, ns[1:])
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return
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}
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}
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fmt.Printf("Not adding methods for %s: interface name not found in first child node of category defclaration\n",n.Name)
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}
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func (w *Wrapper) add(name string, ns []ast.Node) {
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var i Interface
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var ok bool
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if i,ok = w.Interfaces[name]; !ok {
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i = Interface{
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Name: name,
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Properties: map[string]Property{},
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Methods: map[string]Method{},
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}
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}
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tp := types.NewTypeFromString(name,name)
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types.Wrap(tp.GoType())
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var avail bool
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for _,c := range ns {
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switch x := c.(type) {
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case *ast.ObjCPropertyDecl:
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//fmt.Printf("ObjCPropertyDecl: %s\n",x.Name)
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p := Property{
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Name: x.Name,
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Type: types.NewTypeFromString(x.Type,name),
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}
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//_,avail = w.GetParms(x,name) // TODO
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//if avail {
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i.Properties[p.Name] = p
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//}
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case *ast.ObjCMethodDecl:
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//fmt.Printf("ObjCMethodDecl: %s (%s) %s\n",x.Type,name,x.Name)
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m := Method{
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Name: x.Name,
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Type: types.NewTypeFromString(x.Type,name),
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Class: name,
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ClassMethod: x.ClassMethod,
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}
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//fmt.Println(m.Type.Node.String())
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m.Parameters, avail = w.GetParms(x,name)
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if avail {
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i.Methods[m.Name] = m
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}
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case *ast.ObjCProtocol:
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//fmt.Printf("ast.ObjCProtocol: %s\n",x.Name)
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case *ast.ObjCInterface:
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if x.Super {
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//fmt.Printf("ast.ObjCInterface: %s inherits from %s\n",name,x.Name)
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types.SetSuper(name,x.Name)
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}
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case *ast.ObjCTypeParamDecl:
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//fmt.Printf("ObjCTypeParamDecl: %s = %s\n",x.Name,x.Type)
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types.SetTypeParam(name,x.Name,x.Type)
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case *ast.Unknown:
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//fmt.Printf("(*ast.Unkonwn %s: %s)\n",x.Name,x.Content)
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default:
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//fmt.Println(reflect.TypeOf(x))
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}
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}
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//fmt.Println("Add interface ",i.Name)
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w.Interfaces[i.Name] = i
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}
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type AvailAttr struct {
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OS, Version string
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Deprecated bool
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}
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//GetParms returns the parameters of a method declaration and a bool
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//indicating whether the given method is available on MacOS and not
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//deprecated.
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func (w *Wrapper) GetParms(n *ast.ObjCMethodDecl,class string) ([]Parameter,bool) {
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ret := make([]Parameter,0)
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avail := make([]AvailAttr,0)
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j := 0
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for _,c := range n.Children() {
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switch x := c.(type) {
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case *ast.ParmVarDecl:
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p := Parameter{
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Pname: n.Parameters[j],
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Vname: x.Name,
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Type: types.NewTypeFromString(x.Type,class),
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}
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ret = append(ret,p)
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j++
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case *ast.Variadic:
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ret[j-1].Type.Variadic = true
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case *ast.AvailabilityAttr:
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avail = append(avail,
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AvailAttr{
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OS: x.OS,
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Version: x.Version,
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Deprecated: x.Unknown1 != "0",
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})
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//fmt.Println("AvailAttr ",avail,x)
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case *ast.UnavailableAttr:
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avail = append(avail,
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AvailAttr{ OS: "macos", Deprecated: true })
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case *ast.Unknown:
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if Debug { fmt.Printf("GetParms(): ast.Unknown: %s\n",x.Name) }
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}
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}
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// check that the method is available for this OS and not deprecated
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a := func() bool {
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if len(avail) == 0 {
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return true
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}
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for _,x := range avail {
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if x.OS == "macos" && x.Deprecated == false {
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return true
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}
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}
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return false
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}()
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if !a {
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return nil, false
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}
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// check that we found the right number of parameters
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if len(ret) != len(n.Parameters) {
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fmt.Printf("Error in method declaration %s: Wrong number of ParmVarDecl children: %d parameters but %d ParmVarDecl children\n",n.Name,len(n.Parameters),len(ret))
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}
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return ret, true
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}
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func (w *Wrapper) processTypes(tps []*types.Type) {
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switch len(tps) {
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case 0:
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return
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case 1:
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w.processType(tps[0])
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default:
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for _,tp := range tps {
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w.processType(tp)
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}
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return
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}
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}
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func (w *Wrapper) processType(tp *types.Type) {
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bt := tp.BaseType()
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gt := bt.GoType()
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if gt == "" {
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return
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}
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if gt[0] == '*' {
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w.processType(bt.PointsTo())
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return
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}
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if w.Processed[gt] { return }
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w.Processed[gt] = true
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if gt == "Char" {
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w.CharHelpers()
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}
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if bt.IsFunction() {
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return
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}
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super := types.Super(gt)
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if super != "" {
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types.Wrap(super)
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w.processType(types.NewTypeFromString(super,""))
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}
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w.goTypes.WriteString(bt.GoTypeDecl())
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}
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func (w *Wrapper) CharHelpers() {
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w.goHelpers.WriteString(`
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func CharFromString(s string) *Char {
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return (*Char)(unsafe.Pointer(C.CString(s)))
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}
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func CharFromBytes(b []byte) *Char {
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return (*Char)(unsafe.Pointer(C.CString(string(b))))
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}
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func (c *Char) String() string {
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return C.GoString((*C.char)(c))
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}
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`)
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}
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func (w *Wrapper) Wrap(toproc []string) {
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if w.Package == "" { w.Package = "ns" }
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err := os.MkdirAll(w.Package,0755)
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if err != nil {
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fmt.Printf("Error creating directory '%s'\n%s\n",w.Package,err)
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os.Exit(-1)
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}
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of,err := os.Create(path.Join(w.Package,"main.go"))
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if err != nil {
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fmt.Printf("Error opening file %s\n%s\n",path.Join(w.Package,"main.go"),err)
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os.Exit(-1)
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}
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fmt.Printf("Writing output to %s\n",path.Join(w.Package,"main.go"))
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pInterfaces := map[string]Interface{}
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for _,iface := range toproc {
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pInterfaces[iface] = w.Interfaces[iface]
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}
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//FIXME: sort pInterfaces
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for _,i := range pInterfaces {
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fmt.Printf("Interface %s: %d properties, %d methods\n",
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i.Name, len(i.Properties), len(i.Methods))
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w.goCode.WriteString(fmt.Sprintf(`
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func New%s() *%s {
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return (*%s)(unsafe.Pointer(C.New%s()))
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}
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`,i.Name,i.Name,i.Name,i.Name))
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w.cCode.WriteString(fmt.Sprintf(`
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%s*
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New%s() {
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return [%s alloc];
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}
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`, i.Name, i.Name, i.Name))
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//FIXME: sort properties
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for _,p := range i.Properties {
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if Debug {
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fmt.Printf(" property: %s (%s)\n", p.Name, p.Type.CType())
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}
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}
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//FIXME: sort methods
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for _,m := range i.Methods {
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if Debug {
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fmt.Printf(" method: %s (%s)\n", m.Name, m.Type)
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}
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if m.Type.IsFunction() {
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continue
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}
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if m.hasFunctionParam() {
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continue
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}
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gname := strings.Title(m.Name)
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if !m.ClassMethod {
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gname = "(o *" + i.Name + ") " + gname
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}
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cname := i.Name + "_" + m.Name
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cmtype := m.Type.CTypeAttrib()
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ns,tps,gplist := m.gpntp()
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w.processTypes(tps)
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w.processType(m.Type)
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grtype := m.Type.GoType()
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if grtype == "Void" {
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grtype = ""
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}
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w.goCode.WriteString(fmt.Sprintf(`
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//%s
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func %s(%s) %s {
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`,m.Type.CType(),gname,gplist,grtype))
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lparm := len(tps)-1
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if len(tps) > 0 && tps[lparm].Variadic {
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vn := ns[lparm]
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vn = vn[:len(vn)-1]
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ns[lparm] = vn
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w.goCode.WriteString(fmt.Sprintf(
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` var %s [%d]unsafe.Pointer
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for i,o := range %ss {
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%s[i] = o.Ptr()
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}
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`,vn,w.VaArgs,vn,vn))
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}
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w.goCode.WriteString(
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types.GoToC(cname,ns,m.Type,tps) + "}\n\n")
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cret := ""
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if !m.isVoid() {
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cret = "return "
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}
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var cobj string
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if m.ClassMethod {
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cobj = i.Name
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} else {
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cobj = "(id)obj"
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}
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w.cCode.WriteString(fmt.Sprintf(`
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%s
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%s(%s) {
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`, cmtype, cname, w.cparamlist(m)))
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if len(tps) > 0 && tps[lparm].Variadic {
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w.cCode.WriteString(fmt.Sprintf(
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` %s* arr = %s;
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`, tps[lparm].CType(), ns[lparm]))
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}
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w.cCode.WriteString(fmt.Sprintf(` %s[%s %s];
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}`, cret, cobj, w.objcparamlist(m)))
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}
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}
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of.WriteString("package " + w.Package + "\n\n")
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of.WriteString(w.cCode.String())
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of.WriteString(`
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*/
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import "C"
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import (
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"unsafe"
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)
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`)
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of.WriteString(w.goTypes.String())
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of.WriteString(w.goHelpers.String())
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of.WriteString(w.goCode.String())
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of.Close()
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}
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