Greg
4f260dda0e
char* to and from Go strings. Parse block (^) types. Skip methods with functions as parameters. Fix passing pointers go C code.
696 lines
15 KiB
Go
696 lines
15 KiB
Go
package wrap
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import (
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"fmt"
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//"reflect"
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"strings"
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"gitlab.wow.st/gmp/clast/ast"
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"gitlab.wow.st/gmp/clast/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 cStruct struct {
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goName, cName string
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}
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type Wrapper struct {
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Interfaces map[string]Interface
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Tps map[string]*types.Node
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Types map[string]string
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gtMap map[string]string
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ctMap map[string]*types.Node // map from go type as a string.
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goStructTypes map[string]cStruct // map from gotype to struct descr.
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goInterfaceTypes []string
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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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Processed2 map[string]bool
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}
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var gobuiltinTypes map[string]bool = map[string]bool{
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"byte": true,
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"int": true,
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"float64": true,
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}
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// translate C builtin types to CGo
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var builtinTypes map[string]string = map[string]string{
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"char": "C.char",
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"signed char": "C.schar",
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"unsigned char": "C.uchar",
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"short": "C.short",
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"unsigned short": "C.ushort",
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"int": "C.int",
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"unsigned int": "C.uint",
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"long": "C.long",
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"unsigned long": "C.ulong",
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"long long": "C.longlong",
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"unsigned long long": "C.ulonglong",
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"float": "C.float",
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"double": "C.double",
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"complex float": "C.complexfloat",
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"complex double": "C.complexdouble",
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}
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//AddType registers a type that needs a Go wrapper struct
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func (w *Wrapper) AddType(t, class string) {
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//fmt.Printf("Type: %s\n",t)
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if _,ok := builtinTypes[t]; ok {
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return
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}
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nt := w.goType(t,class)
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if Debug {
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fmt.Printf("AddType(): (%s) -> %s\n",t,nt)
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}
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if nt == "" {
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return
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}
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if _,ok := w.Interfaces[nt]; !ok { // not an interface
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return
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}
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}
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func (w *Wrapper) goType(t,class string) string {
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if len(t) > 1 && t[:2] == "id" { t = "NSObject *" }
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if len(t) > 11 {
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if t[:12] == "instancename" { t = class }
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if t[:12] == "instancetype" { t = class + " *" }
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}
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n,err := types.Parse(t)
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if err != nil {
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//fmt.Printf("Cannot parse type %s\n",t)
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return ""
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}
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if n.HasFunc() {
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//fmt.Printf("Function types not supported (%s)\n",t)
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return ""
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}
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ct := n.CtypeSimplified()
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ret := ""
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if nt, ok := w.gtMap[ct]; ok { // we already know this type
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return nt
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}
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if x := n.PointsTo(); x != nil {
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pt := x.CtypeSimplified()
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// if _,ok := w.Interfaces[pt]; ok {
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// // pointer to Objective-C interface, stop here
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// //fmt.Printf("goType(): %s -> %s\n",t,pt)
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// w.gtMap[ct] = pt
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// w.goInterfaceTypes = append(w.goInterfaceTypes,pt)
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// return pt
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// }
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// pt = x.BaseType().CtypeSimplified()
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// if _,ok := w.Interfaces[pt]; ok {
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// // ultimately points to an interface, so need a wrapper
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// w.AddType(pt,class)
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// ret = w.goType(pt,class) + "Ptr"
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// //fmt.Printf("goType(): %s -> %s\n",t,ret)
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// w.gtMap[ct] = ret
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// return ret
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// }
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// pointer to non-interface type
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ret = "*" + w.goType(pt,class)
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w.gtMap[ct] = ret
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w.ctMap[ret] = n
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return ret
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}
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if x := n.ArrayOf(); x != nil {
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pt := x.CtypeSimplified()
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w.AddType(pt,class)
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ret = "[]" + w.goType(pt,class)
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//fmt.Printf("goType(): %s -> %s\n",t,ret)
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w.gtMap[ct] = ret
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w.ctMap[ret] = n
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return ret
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}
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if bt,ok := builtinTypes[ct]; ok {
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ct = bt
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}
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if _,ok := w.Interfaces[ct]; ok {
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// pointer to Objective-C interface, stop here
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//fmt.Printf("goType(): %s -> %s\n",t,pt)
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w.gtMap[ct] = ct
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w.goInterfaceTypes = append(w.goInterfaceTypes,ct)
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w.ctMap[ct] = n
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w.Types[ct] = t
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return ct
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}
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if n.IsStruct() {
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gt := strings.Title(ct)
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gt = strings.ReplaceAll(gt, " ", "")
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w.gtMap[ct] = gt
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w.goStructTypes[gt] = cStruct{ goName: gt, cName: ct }
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//fmt.Printf("goType(): %s -> %s\n",t,gt)
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w.ctMap[gt] = n
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return gt
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}
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//fmt.Printf("goType(): %s -> %s\n",t,ct)
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w.gtMap[ct] = ct
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w.ctMap[ct] = n
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return ct
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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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return &Wrapper{
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Interfaces: map[string]Interface{},
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Types: map[string]string{},
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gtMap: map[string]string{},
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ctMap: map[string]*types.Node{},
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goStructTypes: map[string]cStruct{},
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Processed: map[string]bool{},
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Processed2: map[string]bool{},
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}
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}
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type Property struct {
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Name, Type, Attr string
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Tp *types.Type
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}
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type Parameter struct {
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Pname, Vname, Type string
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Tp *types.Type
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}
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type Method struct {
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Name, Type, Class string
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Tp *types.Type
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ClassMethod bool
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Parameters []Parameter
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}
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func (m Method) isVoid() bool {
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return m.Type == "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.Tp.Node.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) isObject(tp string) bool { // takes a goType
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if _,ok := w.Interfaces[tp]; ok {
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return true
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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.Tp.Node.IsPointer() {
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tp = "void*"
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} else {
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tp = p.Tp.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 {
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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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ret = append(ret, p.Pname + ":" + p.Vname)
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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.Tp)
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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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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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func (w Wrapper) goparamlist(m Method) (string,[]string,bool) {
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ret := []string{}
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tps := []string{}
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for _,p := range m.Parameters {
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gname := p.Vname
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w.AddType(p.Type,m.Class)
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tp := w.goType(p.Type,m.Class)
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if tp == "" {
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return "UNSUPPORTED TYPE", []string{},false
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}
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if w.isObject(tp) {
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tp = "*" + tp
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}
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if goreserved[gname] {
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gname = gname + "_"
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}
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tps = append(tps,tp)
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ret = append(ret,fmt.Sprintf("%s %s",gname,tp))
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}
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return strings.Join(ret,", "),tps,true
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}
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func (w Wrapper) goparamnames(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,"o.ptr")
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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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gt := w.goType(p.Type,m.Class)
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if gt == "" {
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return "UNSUPPORTED TYPE " + p.Type
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}
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if w.isObject(gt) {
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gname = gname + ".ptr"
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} else {
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n := w.ctMap[gt]
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star := ""
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for pt := n.PointsTo(); pt != nil; pt = pt.PointsTo() {
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star = star + "*"
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}
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ct := n.BaseType().CtypeSimplified()
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if n.IsStruct() {
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ct = strings.ReplaceAll(ct,"struct ","")
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ct = "struct_" + ct
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}
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if gt[0] == '*' { // wrap pointers in unsafe.Pointer()
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gname = "unsafe.Pointer(" + gname + ")"
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}
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gname = "(" + star + "C." + ct + ")(" + gname + ")"
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}
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ret = append(ret,gname)
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}
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return strings.Join(ret, ", ")
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}
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type Interface struct {
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Name, Super 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 (i Interface) IsRoot() bool {
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if i.Super == "" || i.Super == i.Name {
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return true
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}
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return false
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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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w.AddType(name,name) // need this?
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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: x.Type,
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Tp: 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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// w.AddType(x.Type,name)
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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\n",x.Name)
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m := Method{
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Name: x.Name,
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Type: x.Type,
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Tp: 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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m.Parameters, avail = w.GetParms(x,name)
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if avail {
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// w.AddType(x.Type,name)
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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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i.Super = x.Name
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types.SetSuper(name,x.Name)
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}
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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: x.Type,
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Tp: 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.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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// new version of ProcessType
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func (w *Wrapper) pt2(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._pt2(tps[0])
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default:
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for _,tp := range tps {
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w.pt2(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) _pt2(tp *types.Type) {
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bt := tp.BaseType()
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if w.Processed2[bt.GoType()] { return }
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w.Processed2[bt.GoType()] = true
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if bt.Node.IsFunction() {
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return
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}
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w.goTypes.WriteString(tp.GoTypeDecl())
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if tp.GoType() == "*Char" {
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w.CharHelpers()
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}
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super := types.Super(bt.GoType())
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if super != "" {
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types.Wrap(super)
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pt := types.NewTypeFromString(super + "*","")
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w._pt2(pt)
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}
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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 {
|
|
return C.GoString((*C.char)(c))
|
|
}
|
|
`)
|
|
}
|
|
|
|
func (w *Wrapper) ProcessType(gotype string) {
|
|
if gotype == "" {
|
|
return
|
|
}
|
|
if gotype[0] == '*' {
|
|
gotype = gotype[1:]
|
|
}
|
|
if w.Processed[gotype] {
|
|
return
|
|
}
|
|
w.Processed[gotype] = true
|
|
if _,ok := gobuiltinTypes[gotype]; ok {
|
|
return
|
|
}
|
|
ctype := w.Types[gotype]
|
|
if _,ok := builtinTypes[ctype]; ok {
|
|
return
|
|
}
|
|
if Debug {
|
|
fmt.Printf("Processing %s (%s)\n",gotype,ctype)
|
|
}
|
|
if i,ok := w.Interfaces[gotype]; ok {
|
|
if Debug {
|
|
fmt.Printf("Have interface for %s. super = %s\n",gotype,i.Super)
|
|
}
|
|
if i.Name != i.Super {
|
|
w.ProcessType(i.Super)
|
|
}
|
|
var fields string
|
|
// if there is an Interface known for this type, decide if it is the
|
|
// root object and if so give it a pointer element:
|
|
if i.IsRoot() {
|
|
fields = "ptr unsafe.Pointer"
|
|
} else {
|
|
fields = i.Super // embed superclass
|
|
}
|
|
w.goTypes.WriteString(fmt.Sprintf(`
|
|
// %s
|
|
type %s struct { %s }
|
|
`,ctype, gotype, fields))
|
|
}
|
|
if s,ok := w.goStructTypes[gotype]; ok {
|
|
ct := strings.ReplaceAll(s.cName," ","_")
|
|
w.goTypes.WriteString(fmt.Sprintf(`
|
|
type %s %s
|
|
`,s.goName,"C." + ct))
|
|
}
|
|
}
|
|
|
|
func (w *Wrapper) ProcessTypes(tps []string) {
|
|
for _,tp := range tps {
|
|
w.ProcessType(tp)
|
|
}
|
|
}
|
|
|
|
func (w *Wrapper) Wrap(toproc []string) {
|
|
|
|
w.cCode.WriteString(`/*
|
|
#cgo CFLAGS: -x objective-c
|
|
#cgo LDFLAGS: -framework Foundation
|
|
|
|
#import <Foundation/Foundation.h>
|
|
`)
|
|
|
|
pInterfaces := map[string]Interface{}
|
|
for _,iface := range toproc {
|
|
pInterfaces[iface] = w.Interfaces[iface]
|
|
}
|
|
for iname,i := range pInterfaces {
|
|
if Debug {
|
|
fmt.Printf("Interface %s: %d properties, %d methods\n",
|
|
iname, len(i.Properties), len(i.Methods))
|
|
}
|
|
|
|
w.goCode.WriteString(fmt.Sprintf(`
|
|
func New%s() *%s {
|
|
ret := &%s{}
|
|
ret.ptr = unsafe.Pointer(C.New%s())
|
|
ret = ret.Init()
|
|
return ret
|
|
}
|
|
`,i.Name,i.Name,i.Name,i.Name))
|
|
|
|
w.cCode.WriteString(fmt.Sprintf(`
|
|
%s*
|
|
New%s() {
|
|
return [%s alloc];
|
|
}
|
|
`, i.Name, i.Name, i.Name))
|
|
|
|
for _,p := range i.Properties {
|
|
if Debug {
|
|
fmt.Printf(" property: %s (%s)\n", p.Name, p.Type)
|
|
}
|
|
w.AddType(p.Type,i.Name)
|
|
}
|
|
for _,m := range i.Methods {
|
|
if Debug {
|
|
fmt.Printf(" method: %s (%s)\n", m.Name, m.Type)
|
|
}
|
|
if m.Tp.Node.IsFunction() {
|
|
continue
|
|
}
|
|
if m.hasFunctionParam() {
|
|
continue
|
|
}
|
|
gname := strings.Title(m.Name)
|
|
cname := i.Name + "_" + m.Name
|
|
|
|
w.AddType(m.Type,i.Name)
|
|
//cmtype := w.ctMap[w.goType(m.Type,i.Name)].CtypeSimplified()
|
|
cmtype := m.Tp.CType()
|
|
ns,tps,gplist := m.gpntp()
|
|
w.pt2(tps...)
|
|
w.pt2(m.Tp)
|
|
grtype := m.Tp.GoType()
|
|
if grtype == "Void" {
|
|
grtype = ""
|
|
}
|
|
w.goCode.WriteString(fmt.Sprintf(`
|
|
func (o *%s) %s(%s) %s {
|
|
`,i.Name,gname,gplist,grtype))
|
|
w.goCode.WriteString(
|
|
types.GoToC(cname,ns,m.Tp,tps) + "}\n\n")
|
|
|
|
cret := ""
|
|
if !m.isVoid() {
|
|
cret = "return "
|
|
}
|
|
var cobj string
|
|
if m.ClassMethod {
|
|
cobj = i.Name
|
|
} else {
|
|
cobj = "(id)obj"
|
|
}
|
|
w.cCode.WriteString(fmt.Sprintf(`
|
|
%s
|
|
%s(%s) {
|
|
%s[%s %s];
|
|
}`, cmtype, cname, w.cparamlist(m), cret, cobj, w.objcparamlist(m)))
|
|
}
|
|
}
|
|
fmt.Println(`package main
|
|
`)
|
|
fmt.Println(w.cCode.String())
|
|
fmt.Println(`
|
|
*/
|
|
import "C"
|
|
|
|
import (
|
|
"unsafe"
|
|
)
|
|
`)
|
|
fmt.Println(w.goTypes.String())
|
|
fmt.Println(w.goHelpers.String())
|
|
fmt.Println(w.goCode.String())
|
|
}
|