| // Copyright 2015 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 bind |
| |
| import ( |
| "fmt" |
| "go/constant" |
| "go/types" |
| "math" |
| "strings" |
| |
| "golang.org/x/mobile/internal/importers/objc" |
| ) |
| |
| // TODO(hyangah): handle method name conflicts. |
| // - struct with SetF method and exported F field. |
| // - method names conflicting with NSObject methods. e.g. Init |
| // - interface type with InitWithRef. |
| |
| // TODO(hyangah): error code/domain propagation |
| |
| type ObjcGen struct { |
| Prefix string // prefix arg passed by flag. |
| |
| *Generator |
| |
| // fields set by init. |
| namePrefix string |
| // Map of all wrapped Objc types |
| wrapMap map[string]*objc.Named |
| // Structs that embeds Objc wrapper types. |
| ostructs map[*types.TypeName]*objcClassInfo |
| modules []string |
| // Constructors is a map from Go struct types to a list |
| // of exported constructor functions for the type, on the form |
| // func New<Type>(...) *Type |
| constructors map[*types.TypeName][]*types.Func |
| } |
| |
| type objcClassInfo struct { |
| // The Objc class this class extends. |
| extends *objc.Named |
| // All classes and protocols this class extends and conforms to. |
| supers []*objc.Named |
| methods map[string]*objc.Func |
| } |
| |
| func (g *ObjcGen) Init(wrappers []*objc.Named) { |
| g.Generator.Init() |
| g.namePrefix = g.namePrefixOf(g.Pkg) |
| g.wrapMap = make(map[string]*objc.Named) |
| g.constructors = make(map[*types.TypeName][]*types.Func) |
| modMap := make(map[string]struct{}) |
| for _, w := range wrappers { |
| g.wrapMap[w.GoName] = w |
| if _, exists := modMap[w.Module]; !exists { |
| if !w.Generated { |
| g.modules = append(g.modules, w.Module) |
| } |
| modMap[w.Module] = struct{}{} |
| } |
| } |
| if _, exists := modMap["Foundation"]; !exists { |
| g.modules = append(g.modules, "Foundation") |
| } |
| g.ostructs = make(map[*types.TypeName]*objcClassInfo) |
| for _, s := range g.structs { |
| embds := embeddedObjcTypes(s.t) |
| if len(embds) == 0 { |
| continue |
| } |
| inf := &objcClassInfo{ |
| methods: make(map[string]*objc.Func), |
| } |
| for _, n := range embds { |
| t := g.wrapMap[n] |
| for _, f := range t.AllMethods { |
| inf.methods[f.GoName] = f |
| } |
| inf.supers = append(inf.supers, t) |
| if !t.Protocol { |
| if inf.extends != nil { |
| g.errorf("%s embeds more than one ObjC class; only one is allowed.", s.obj) |
| } |
| inf.extends = t |
| } |
| } |
| g.ostructs[s.obj] = inf |
| } |
| for _, f := range g.funcs { |
| if t := g.constructorType(f); t != nil { |
| g.constructors[t] = append(g.constructors[t], f) |
| } |
| } |
| } |
| |
| func (g *ObjcGen) namePrefixOf(pkg *types.Package) string { |
| if pkg == nil { |
| return "Universe" |
| } |
| p := g.Prefix |
| return p + strings.Title(pkg.Name()) |
| } |
| |
| func (g *ObjcGen) GenGoH() error { |
| var pkgPath string |
| if g.Pkg != nil { |
| pkgPath = g.Pkg.Path() |
| } |
| g.Printf(objcPreamble, pkgPath, g.gobindOpts(), pkgPath) |
| g.Printf("#ifndef __GO_%s_H__\n", g.pkgName) |
| g.Printf("#define __GO_%s_H__\n\n", g.pkgName) |
| g.Printf("#include <stdint.h>\n") |
| g.Printf("#include <objc/objc.h>\n") |
| |
| for _, i := range g.interfaces { |
| if !i.summary.implementable { |
| continue |
| } |
| for _, m := range i.summary.callable { |
| if !g.isSigSupported(m.Type()) { |
| g.Printf("// skipped method %s.%s with unsupported parameter or return types\n\n", i.obj.Name(), m.Name()) |
| continue |
| } |
| g.genInterfaceMethodSignature(m, i.obj.Name(), true, g.paramName) |
| g.Printf("\n") |
| } |
| } |
| |
| g.Printf("#endif\n") |
| |
| if len(g.err) > 0 { |
| return g.err |
| } |
| return nil |
| } |
| |
| func (g *ObjcGen) GenH() error { |
| var pkgPath string |
| if g.Pkg != nil { |
| pkgPath = g.Pkg.Path() |
| } |
| g.Printf(objcPreamble, pkgPath, g.gobindOpts(), pkgPath) |
| g.Printf("#ifndef __%s_H__\n", g.namePrefix) |
| g.Printf("#define __%s_H__\n", g.namePrefix) |
| g.Printf("\n") |
| for _, m := range g.modules { |
| g.Printf("@import %s;\n", m) |
| } |
| g.Printf("#include \"ref.h\"\n") |
| if g.Pkg != nil { |
| g.Printf("#include \"Universe.objc.h\"\n\n") |
| } |
| |
| if g.Pkg != nil { |
| for _, pkg := range g.Pkg.Imports() { |
| if g.validPkg(pkg) { |
| g.Printf("#include %q\n", g.namePrefixOf(pkg)+".objc.h") |
| } |
| } |
| } |
| g.Printf("\n") |
| |
| // Forward declaration of @class and @protocol |
| for _, s := range g.structs { |
| g.Printf("@class %s%s;\n", g.namePrefix, s.obj.Name()) |
| } |
| for _, i := range g.interfaces { |
| g.Printf("@protocol %s%s;\n", g.namePrefix, i.obj.Name()) |
| if i.summary.implementable { |
| g.Printf("@class %s%s;\n", g.namePrefix, i.obj.Name()) |
| // Forward declaration for other cases will be handled at the beginning of GenM. |
| } |
| } |
| if len(g.structs) > 0 || len(g.interfaces) > 0 { |
| g.Printf("\n") |
| } |
| |
| // @interfaces |
| for _, i := range g.interfaces { |
| g.genInterfaceH(i.obj, i.t) |
| g.Printf("\n") |
| } |
| for _, s := range g.structs { |
| g.genStructH(s.obj, s.t) |
| g.Printf("\n") |
| } |
| |
| // const |
| // TODO: prefix with k?, or use a class method? |
| for _, obj := range g.constants { |
| if _, ok := obj.Type().(*types.Basic); !ok || !g.isSupported(obj.Type()) { |
| g.Printf("// skipped const %s with unsupported type: %s\n\n", obj.Name(), obj.Type()) |
| continue |
| } |
| g.objcdoc(g.docs[obj.Name()].Doc()) |
| switch b := obj.Type().(*types.Basic); b.Kind() { |
| case types.String, types.UntypedString: |
| g.Printf("FOUNDATION_EXPORT NSString* _Nonnull const %s%s;\n", g.namePrefix, obj.Name()) |
| default: |
| g.Printf("FOUNDATION_EXPORT const %s %s%s;\n", g.objcType(obj.Type()), g.namePrefix, obj.Name()) |
| } |
| } |
| if len(g.constants) > 0 { |
| g.Printf("\n") |
| } |
| |
| // var |
| if len(g.vars) > 0 { |
| g.Printf("@interface %s : NSObject\n", g.namePrefix) |
| for _, obj := range g.vars { |
| if t := obj.Type(); !g.isSupported(t) { |
| g.Printf("// skipped variable %s with unsupported type: %s\n\n", obj.Name(), t) |
| continue |
| } |
| objcType := g.objcType(obj.Type()) |
| g.objcdoc(g.docs[obj.Name()].Doc()) |
| g.Printf("+ (%s) %s;\n", objcType, objcNameReplacer(lowerFirst(obj.Name()))) |
| g.Printf("+ (void) set%s:(%s)v;\n", obj.Name(), objcType) |
| g.Printf("\n") |
| } |
| g.Printf("@end\n\n") |
| } |
| |
| // static functions. |
| for _, obj := range g.funcs { |
| g.genFuncH(obj) |
| g.Printf("\n") |
| } |
| |
| for _, i := range g.interfaces { |
| if i.summary.implementable { |
| g.Printf("@class %s%s;\n\n", g.namePrefix, i.obj.Name()) |
| } |
| } |
| for _, i := range g.interfaces { |
| if i.summary.implementable { |
| // @interface Interface -- similar to what genStructH does. |
| g.genInterfaceInterface(i.obj, i.summary, true) |
| g.Printf("\n") |
| } |
| } |
| |
| g.Printf("#endif\n") |
| |
| if len(g.err) > 0 { |
| return g.err |
| } |
| return nil |
| } |
| |
| func (g *ObjcGen) gobindOpts() string { |
| opts := []string{"-lang=objc"} |
| if g.Prefix != "" { |
| opts = append(opts, fmt.Sprintf("-prefix=%q", g.Prefix)) |
| } |
| return strings.Join(opts, " ") |
| } |
| |
| func (g *ObjcGen) GenM() error { |
| var pkgPath string |
| if g.Pkg != nil { |
| pkgPath = g.Pkg.Path() |
| } |
| g.Printf(objcPreamble, pkgPath, g.gobindOpts(), pkgPath) |
| g.Printf("#include <Foundation/Foundation.h>\n") |
| g.Printf("#include \"seq.h\"\n") |
| g.Printf("#include \"_cgo_export.h\"\n") |
| g.Printf("#include %q\n", g.namePrefix+".objc.h") |
| g.Printf("\n") |
| |
| // struct |
| for _, s := range g.structs { |
| g.genStructM(s.obj, s.t) |
| g.Printf("\n") |
| } |
| |
| // interface |
| var needProxy []*types.TypeName |
| for _, i := range g.interfaces { |
| if g.genInterfaceM(i.obj, i.t) { |
| needProxy = append(needProxy, i.obj) |
| } |
| g.Printf("\n") |
| } |
| |
| // const |
| for _, o := range g.constants { |
| g.genConstM(o) |
| } |
| if len(g.constants) > 0 { |
| g.Printf("\n") |
| } |
| |
| // vars |
| if len(g.vars) > 0 { |
| g.Printf("@implementation %s\n", g.namePrefix) |
| for _, o := range g.vars { |
| g.genVarM(o) |
| } |
| g.Printf("@end\n\n") |
| } |
| |
| g.Printf("\n") |
| |
| for _, obj := range g.funcs { |
| if !g.isSigSupported(obj.Type()) { |
| g.Printf("// skipped function %s with unsupported parameter or return types\n\n", obj.Name()) |
| continue |
| } |
| g.genFuncM(obj) |
| g.Printf("\n") |
| } |
| |
| for _, i := range g.interfaces { |
| for _, m := range i.summary.callable { |
| if !g.isSigSupported(m.Type()) { |
| g.Printf("// skipped method %s.%s with unsupported parameter or return types\n\n", i.obj.Name(), m.Name()) |
| continue |
| } |
| g.genInterfaceMethodProxy(i.obj, m) |
| } |
| } |
| |
| g.Printf("__attribute__((constructor)) static void init() {\n") |
| g.Indent() |
| g.Printf("init_seq();\n") |
| g.Outdent() |
| g.Printf("}\n") |
| |
| if len(g.err) > 0 { |
| return g.err |
| } |
| |
| return nil |
| } |
| |
| func (g *ObjcGen) genVarM(o *types.Var) { |
| if t := o.Type(); !g.isSupported(t) { |
| g.Printf("// skipped variable %s with unsupported type: %s\n\n", o.Name(), t) |
| return |
| } |
| objcType := g.objcType(o.Type()) |
| |
| // setter |
| g.Printf("+ (void) set%s:(%s)v {\n", o.Name(), objcType) |
| g.Indent() |
| g.genWrite("v", o.Type(), modeRetained) |
| g.Printf("var_set%s_%s(_v);\n", g.pkgPrefix, o.Name()) |
| g.genRelease("v", o.Type(), modeRetained) |
| g.Outdent() |
| g.Printf("}\n\n") |
| |
| // getter |
| g.Printf("+ (%s) %s {\n", objcType, objcNameReplacer(lowerFirst(o.Name()))) |
| g.Indent() |
| g.Printf("%s r0 = ", g.cgoType(o.Type())) |
| g.Printf("var_get%s_%s();\n", g.pkgPrefix, o.Name()) |
| g.genRead("_r0", "r0", o.Type(), modeRetained) |
| g.Printf("return _r0;\n") |
| g.Outdent() |
| g.Printf("}\n\n") |
| } |
| |
| func (g *ObjcGen) genConstM(o *types.Const) { |
| if _, ok := o.Type().(*types.Basic); !ok || !g.isSupported(o.Type()) { |
| g.Printf("// skipped const %s with unsupported type: %s\n\n", o.Name(), o.Type()) |
| return |
| } |
| cName := fmt.Sprintf("%s%s", g.namePrefix, o.Name()) |
| objcType := g.objcType(o.Type()) |
| |
| switch b := o.Type().(*types.Basic); b.Kind() { |
| case types.Bool, types.UntypedBool: |
| v := "NO" |
| if constant.BoolVal(o.Val()) { |
| v = "YES" |
| } |
| g.Printf("const BOOL %s = %s;\n", cName, v) |
| |
| case types.String, types.UntypedString: |
| g.Printf("NSString* const %s = @%s;\n", cName, o.Val().ExactString()) |
| |
| case types.Int, types.Int8, types.Int16, types.Int32: |
| g.Printf("const %s %s = %s;\n", objcType, cName, o.Val()) |
| |
| case types.Int64, types.UntypedInt: |
| i, exact := constant.Int64Val(o.Val()) |
| if !exact { |
| g.errorf("const value %s for %s cannot be represented as %s", o.Val(), o.Name(), objcType) |
| return |
| } |
| if i == math.MinInt64 { |
| // -9223372036854775808LL does not work because 922337203685477508 is |
| // larger than max int64. |
| g.Printf("const int64_t %s = %dLL-1;\n", cName, i+1) |
| } else { |
| g.Printf("const int64_t %s = %dLL;\n", cName, i) |
| } |
| |
| case types.Float32, types.Float64, types.UntypedFloat: |
| f, _ := constant.Float64Val(o.Val()) |
| if math.IsInf(f, 0) || math.Abs(f) > math.MaxFloat64 { |
| g.errorf("const value %s for %s cannot be represented as double", o.Val(), o.Name()) |
| return |
| } |
| g.Printf("const %s %s = %g;\n", objcType, cName, f) |
| |
| default: |
| g.errorf("unsupported const type %s for %s", b, o.Name()) |
| } |
| } |
| |
| type funcSummary struct { |
| name string |
| goname string |
| ret string |
| sig *types.Signature |
| params, retParams []paramInfo |
| hasself bool |
| initName string |
| } |
| |
| type paramInfo struct { |
| typ types.Type |
| name string |
| } |
| |
| func (g *ObjcGen) funcSummary(obj *types.TypeName, f *types.Func) *funcSummary { |
| sig := f.Type().(*types.Signature) |
| s := &funcSummary{goname: f.Name(), sig: sig} |
| var om *objc.Func |
| var sigElems []string |
| oinf := g.ostructs[obj] |
| if oinf != nil { |
| om = oinf.methods[f.Name()] |
| } |
| if om != nil { |
| sigElems = strings.Split(om.Sig, ":") |
| s.name = sigElems[0] |
| } else { |
| s.name = f.Name() |
| } |
| params := sig.Params() |
| first := 0 |
| if oinf != nil { |
| if params.Len() > 0 { |
| v := params.At(0) |
| if v.Name() == "self" { |
| t := v.Type() |
| if t, ok := t.(*types.Named); ok { |
| if pkg := t.Obj().Pkg(); pkgFirstElem(pkg) == "ObjC" { |
| s.hasself = true |
| module := pkg.Path()[len("ObjC/"):] |
| typName := module + "." + t.Obj().Name() |
| exp := g.namePrefix + "." + obj.Name() |
| if typName != exp { |
| g.errorf("the type %s of the `this` argument to method %s is not %s", typName, f.Name(), exp) |
| } |
| } |
| } |
| } |
| } |
| } |
| for i := first; i < params.Len(); i++ { |
| p := params.At(i) |
| v := paramInfo{ |
| typ: p.Type(), |
| } |
| if om != nil { |
| v.name = sigElems[i-first] |
| } else { |
| v.name = g.paramName(params, i) |
| } |
| s.params = append(s.params, v) |
| } |
| if obj != nil { |
| if pref := "New" + obj.Name(); strings.Index(f.Name(), pref) != -1 { |
| s.initName = "init" + f.Name()[len(pref):] |
| } |
| } |
| res := sig.Results() |
| switch res.Len() { |
| case 0: |
| s.ret = "void" |
| case 1: |
| p := res.At(0) |
| if isErrorType(p.Type()) { |
| s.retParams = append(s.retParams, paramInfo{ |
| typ: p.Type(), |
| name: "error", |
| }) |
| s.ret = "BOOL" |
| } else { |
| name := p.Name() |
| if name == "" || paramRE.MatchString(name) { |
| name = "ret0_" |
| } |
| typ := p.Type() |
| s.retParams = append(s.retParams, paramInfo{typ: typ, name: name}) |
| s.ret = g.objcType(typ) |
| } |
| case 2: |
| name := res.At(0).Name() |
| if name == "" || paramRE.MatchString(name) { |
| name = "ret0_" |
| } |
| typ := res.At(0).Type() |
| s.retParams = append(s.retParams, paramInfo{ |
| typ: typ, |
| name: name, |
| }) |
| if isNullableType(typ) { |
| s.ret = g.objcType(typ) // Return is nullable, so satisfies the ObjC/Swift error protocol |
| } else { |
| s.ret = "BOOL" // Return is not nullable, must use an output parameter and return bool |
| } |
| |
| if !isErrorType(res.At(1).Type()) { |
| g.errorf("second result value must be of type error: %s", f) |
| return nil |
| } |
| s.retParams = append(s.retParams, paramInfo{ |
| typ: res.At(1).Type(), |
| name: "error", // TODO(hyangah): name collision check. |
| }) |
| default: |
| // TODO(hyangah): relax the constraint on multiple return params. |
| g.errorf("too many result values: %s", f) |
| return nil |
| } |
| |
| return s |
| } |
| |
| func (s *funcSummary) asFunc(g *ObjcGen) string { |
| var params []string |
| for _, p := range s.params { |
| params = append(params, g.objcParamType(p.typ)+" "+p.name) |
| } |
| skip := 0 |
| if s.returnsVal() { |
| skip = 1 |
| } |
| for _, p := range s.retParams[skip:] { |
| params = append(params, g.objcType(p.typ)+"* _Nullable "+p.name) |
| } |
| paramContents := "void" |
| if len(params) > 0 { |
| paramContents = strings.Join(params, ", ") |
| } |
| return fmt.Sprintf("%s %s%s(%s)", s.ret, g.namePrefix, s.name, paramContents) |
| } |
| |
| func (s *funcSummary) asMethod(g *ObjcGen) string { |
| return fmt.Sprintf("(%s)%s%s", s.ret, objcNameReplacer(lowerFirst(s.name)), s.asSignature(g)) |
| } |
| |
| func (s *funcSummary) asSignature(g *ObjcGen) string { |
| var params []string |
| skip := 0 |
| if s.hasself { |
| skip = 1 |
| } |
| for i, p := range s.params[skip:] { |
| var key string |
| if i != 0 { |
| key = p.name |
| } |
| params = append(params, fmt.Sprintf("%s:(%s)%s", key, g.objcParamType(p.typ), p.name)) |
| } |
| skip = 0 |
| if s.returnsVal() { |
| skip = 1 |
| } |
| for _, p := range s.retParams[skip:] { |
| var key string |
| if len(params) > 0 { |
| key = p.name |
| } |
| params = append(params, fmt.Sprintf("%s:(%s)%s", key, g.objcType(p.typ)+"* _Nullable", p.name)) |
| } |
| return strings.Join(params, " ") |
| } |
| |
| func (s *funcSummary) asInitSignature(g *ObjcGen) string { |
| var params []string |
| for i, p := range s.params { |
| var key string |
| if i > 0 { |
| key = p.name |
| } |
| params = append(params, fmt.Sprintf("%s:(%s)%s", key, g.objcParamType(p.typ), p.name)) |
| } |
| return strings.Join(params, " ") |
| } |
| |
| func (s *funcSummary) callMethod(g *ObjcGen) string { |
| var params []string |
| for i, p := range s.params { |
| var key string |
| if i != 0 { |
| key = p.name |
| } |
| params = append(params, fmt.Sprintf("%s:_%s", key, p.name)) |
| } |
| skip := 0 |
| if s.returnsVal() { |
| skip = 1 |
| } |
| for _, p := range s.retParams[skip:] { |
| var key string |
| if len(params) > 0 { |
| key = p.name |
| } |
| params = append(params, fmt.Sprintf("%s:&%s", key, p.name)) |
| } |
| return fmt.Sprintf("%s%s", objcNameReplacer(lowerFirst(s.name)), strings.Join(params, " ")) |
| } |
| |
| func (s *funcSummary) returnsVal() bool { |
| return (len(s.retParams) == 1 && !isErrorType(s.retParams[0].typ)) || (len(s.retParams) == 2 && isNullableType(s.retParams[0].typ)) |
| } |
| |
| func (g *ObjcGen) paramName(params *types.Tuple, pos int) string { |
| name := basicParamName(params, pos) |
| return objcNameReplacer(name) |
| } |
| |
| func (g *ObjcGen) genFuncH(obj *types.Func) { |
| if !g.isSigSupported(obj.Type()) { |
| g.Printf("// skipped function %s with unsupported parameter or return types\n\n", obj.Name()) |
| return |
| } |
| if s := g.funcSummary(nil, obj); s != nil { |
| g.objcdoc(g.docs[obj.Name()].Doc()) |
| g.Printf("FOUNDATION_EXPORT %s;\n", s.asFunc(g)) |
| } |
| } |
| |
| func (g *ObjcGen) genFuncM(obj *types.Func) { |
| s := g.funcSummary(nil, obj) |
| if s == nil { |
| return |
| } |
| g.Printf("%s {\n", s.asFunc(g)) |
| g.Indent() |
| g.genFunc(s, "") |
| g.Outdent() |
| g.Printf("}\n") |
| } |
| |
| func (g *ObjcGen) genGetter(oName string, f *types.Var) { |
| t := f.Type() |
| g.Printf("- (%s)%s {\n", g.objcType(t), objcNameReplacer(lowerFirst(f.Name()))) |
| g.Indent() |
| g.Printf("int32_t refnum = go_seq_go_to_refnum(self._ref);\n") |
| g.Printf("%s r0 = ", g.cgoType(f.Type())) |
| g.Printf("proxy%s_%s_%s_Get(refnum);\n", g.pkgPrefix, oName, f.Name()) |
| g.genRead("_r0", "r0", f.Type(), modeRetained) |
| g.Printf("return _r0;\n") |
| g.Outdent() |
| g.Printf("}\n\n") |
| } |
| |
| func (g *ObjcGen) genSetter(oName string, f *types.Var) { |
| t := f.Type() |
| |
| g.Printf("- (void)set%s:(%s)v {\n", f.Name(), g.objcType(t)) |
| g.Indent() |
| g.Printf("int32_t refnum = go_seq_go_to_refnum(self._ref);\n") |
| g.genWrite("v", f.Type(), modeRetained) |
| g.Printf("proxy%s_%s_%s_Set(refnum, _v);\n", g.pkgPrefix, oName, f.Name()) |
| g.genRelease("v", f.Type(), modeRetained) |
| g.Outdent() |
| g.Printf("}\n\n") |
| } |
| |
| func (g *ObjcGen) genWrite(varName string, t types.Type, mode varMode) { |
| switch t := t.(type) { |
| case *types.Basic: |
| switch t.Kind() { |
| case types.String: |
| g.Printf("nstring _%s = go_seq_from_objc_string(%s);\n", varName, varName) |
| default: |
| g.Printf("%s _%s = (%s)%s;\n", g.cgoType(t), varName, g.cgoType(t), varName) |
| } |
| case *types.Slice: |
| switch e := t.Elem().(type) { |
| case *types.Basic: |
| switch e.Kind() { |
| case types.Uint8: // Byte. |
| g.Printf("nbyteslice _%s = go_seq_from_objc_bytearray(%s, %d);\n", varName, varName, toCFlag(mode == modeRetained)) |
| default: |
| g.errorf("unsupported type: %s", t) |
| } |
| default: |
| g.errorf("unsupported type: %s", t) |
| } |
| case *types.Named: |
| switch u := t.Underlying().(type) { |
| case *types.Interface: |
| g.genRefWrite(varName) |
| default: |
| g.errorf("unsupported named type: %s / %T", u, u) |
| } |
| case *types.Pointer: |
| g.genRefWrite(varName) |
| default: |
| g.Printf("%s _%s = (%s)%s;\n", g.cgoType(t), varName, g.cgoType(t), varName) |
| } |
| } |
| |
| func (g *ObjcGen) genRefWrite(varName string) { |
| g.Printf("int32_t _%s;\n", varName) |
| g.Printf("if ([%s conformsToProtocol:@protocol(goSeqRefInterface)]) {\n", varName) |
| g.Indent() |
| g.Printf("id<goSeqRefInterface> %[1]s_proxy = (id<goSeqRefInterface>)(%[1]s);\n", varName) |
| g.Printf("_%s = go_seq_go_to_refnum(%s_proxy._ref);\n", varName, varName) |
| g.Outdent() |
| g.Printf("} else {\n") |
| g.Indent() |
| g.Printf("_%s = go_seq_to_refnum(%s);\n", varName, varName) |
| g.Outdent() |
| g.Printf("}\n") |
| } |
| |
| func (g *ObjcGen) genRefRead(toName, fromName string, t types.Type) { |
| ptype := g.refTypeBase(t) |
| g.Printf("%s* %s = nil;\n", ptype, toName) |
| g.Printf("GoSeqRef* %s_ref = go_seq_from_refnum(%s);\n", toName, fromName) |
| g.Printf("if (%s_ref != NULL) {\n", toName) |
| g.Printf(" %s = %s_ref.obj;\n", toName, toName) |
| g.Printf(" if (%s == nil) {\n", toName) |
| if isObjcType(t) { |
| g.Printf(" LOG_FATAL(@\"unexpected NULL reference\");\n") |
| } else { |
| g.Printf(" %s = [[%s alloc] initWithRef:%s_ref];\n", toName, ptype, toName) |
| } |
| g.Printf(" }\n") |
| g.Printf("}\n") |
| } |
| |
| func (g *ObjcGen) genRead(toName, fromName string, t types.Type, mode varMode) { |
| switch t := t.(type) { |
| case *types.Basic: |
| switch t.Kind() { |
| case types.String: |
| g.Printf("NSString *%s = go_seq_to_objc_string(%s);\n", toName, fromName) |
| case types.Bool: |
| g.Printf("BOOL %s = %s ? YES : NO;\n", toName, fromName) |
| default: |
| g.Printf("%s %s = (%s)%s;\n", g.objcType(t), toName, g.objcType(t), fromName) |
| } |
| case *types.Slice: |
| switch e := t.Elem().(type) { |
| case *types.Basic: |
| switch e.Kind() { |
| case types.Uint8: // Byte. |
| g.Printf("NSData *%s = go_seq_to_objc_bytearray(%s, %d);\n", toName, fromName, toCFlag(mode == modeRetained)) |
| default: |
| g.errorf("unsupported type: %s", t) |
| } |
| default: |
| g.errorf("unsupported type: %s", t) |
| } |
| case *types.Pointer: |
| switch t := t.Elem().(type) { |
| case *types.Named: |
| g.genRefRead(toName, fromName, types.NewPointer(t)) |
| default: |
| g.errorf("unsupported type %s", t) |
| } |
| case *types.Named: |
| switch t.Underlying().(type) { |
| case *types.Interface, *types.Pointer: |
| g.genRefRead(toName, fromName, t) |
| default: |
| g.errorf("unsupported, direct named type %s", t) |
| } |
| default: |
| g.Printf("%s %s = (%s)%s;\n", g.objcType(t), toName, g.objcType(t), fromName) |
| } |
| } |
| |
| func (g *ObjcGen) genFunc(s *funcSummary, objName string) { |
| skip := 0 |
| if objName != "" { |
| g.Printf("int32_t refnum = go_seq_go_to_refnum(self._ref);\n") |
| if s.hasself { |
| skip = 1 |
| g.Printf("int32_t _self = go_seq_to_refnum(self);\n") |
| } |
| } |
| for _, p := range s.params[skip:] { |
| g.genWrite(p.name, p.typ, modeTransient) |
| } |
| resPrefix := "" |
| if len(s.retParams) > 0 { |
| if len(s.retParams) == 1 { |
| g.Printf("%s r0 = ", g.cgoType(s.retParams[0].typ)) |
| } else { |
| resPrefix = "res." |
| g.Printf("struct proxy%s_%s_%s_return res = ", g.pkgPrefix, objName, s.goname) |
| } |
| } |
| g.Printf("proxy%s_%s_%s(", g.pkgPrefix, objName, s.goname) |
| if objName != "" { |
| g.Printf("refnum") |
| if s.hasself { |
| g.Printf(", _self") |
| } |
| } |
| for i, p := range s.params[skip:] { |
| if i > 0 || objName != "" { |
| g.Printf(", ") |
| } |
| g.Printf("_%s", p.name) |
| } |
| g.Printf(");\n") |
| for _, p := range s.params { |
| g.genRelease(p.name, p.typ, modeTransient) |
| } |
| |
| for i, r := range s.retParams { |
| g.genRead("_"+r.name, fmt.Sprintf("%sr%d", resPrefix, i), r.typ, modeRetained) |
| } |
| skip = 0 |
| if s.returnsVal() { |
| skip = 1 |
| } |
| for _, p := range s.retParams[skip:] { |
| if isErrorType(p.typ) { |
| g.Printf("if (_%s != nil && %s != nil) {\n", p.name, p.name) |
| g.Indent() |
| g.Printf("*%s = _%s;\n", p.name, p.name) |
| g.Outdent() |
| g.Printf("}\n") |
| } else { |
| g.Printf("*%s = _%s;\n", p.name, p.name) |
| } |
| } |
| |
| if n := len(s.retParams); n > 0 { |
| var ( |
| first = s.retParams[0] |
| last = s.retParams[n-1] |
| ) |
| if (n == 1 && isErrorType(last.typ)) || (n == 2 && !isNullableType(first.typ) && isErrorType(last.typ)) { |
| g.Printf("return (_%s == nil);\n", last.name) |
| } else { |
| if s.returnsVal() && isErrorType(last.typ) { |
| g.Printf("if (_%s != nil) {\n", last.name) |
| g.Indent() |
| g.Printf("return nil;\n") |
| g.Outdent() |
| g.Printf("}\n") |
| } |
| g.Printf("return _%s;\n", first.name) |
| } |
| } |
| } |
| |
| func (g *ObjcGen) genInterfaceInterface(obj *types.TypeName, summary ifaceSummary, isProtocol bool) { |
| doc := g.docs[obj.Name()] |
| g.objcdoc(doc.Doc()) |
| g.Printf("@interface %[1]s%[2]s : ", g.namePrefix, obj.Name()) |
| if isErrorType(obj.Type()) { |
| g.Printf("NSError") |
| } else { |
| g.Printf("NSObject") |
| } |
| prots := []string{"goSeqRefInterface"} |
| if isProtocol { |
| prots = append(prots, fmt.Sprintf("%[1]s%[2]s", g.namePrefix, obj.Name())) |
| } |
| g.Printf(" <%s>", strings.Join(prots, ", ")) |
| g.Printf(" {\n}\n") |
| g.Printf("@property(strong, readonly) _Nonnull id _ref;\n") |
| g.Printf("\n") |
| g.Printf("- (nonnull instancetype)initWithRef:(_Nonnull id)ref;\n") |
| for _, m := range summary.callable { |
| if !g.isSigSupported(m.Type()) { |
| g.Printf("// skipped method %s.%s with unsupported parameter or return types\n\n", obj.Name(), m.Name()) |
| continue |
| } |
| s := g.funcSummary(nil, m) |
| g.objcdoc(doc.Member(m.Name())) |
| g.Printf("- %s;\n", s.asMethod(g)) |
| } |
| g.Printf("@end\n") |
| } |
| |
| func (g *ObjcGen) genInterfaceH(obj *types.TypeName, t *types.Interface) { |
| doc := g.docs[obj.Name()] |
| summary := makeIfaceSummary(t) |
| if !summary.implementable { |
| g.genInterfaceInterface(obj, summary, false) |
| return |
| } |
| g.Printf("@protocol %s%s <NSObject>\n", g.namePrefix, obj.Name()) |
| for _, m := range makeIfaceSummary(t).callable { |
| if !g.isSigSupported(m.Type()) { |
| g.Printf("// skipped method %s.%s with unsupported parameter or return types\n\n", obj.Name(), m.Name()) |
| continue |
| } |
| s := g.funcSummary(nil, m) |
| g.objcdoc(doc.Member(m.Name())) |
| g.Printf("- %s;\n", s.asMethod(g)) |
| } |
| g.Printf("@end\n") |
| } |
| |
| func (g *ObjcGen) genInterfaceM(obj *types.TypeName, t *types.Interface) bool { |
| summary := makeIfaceSummary(t) |
| |
| // @implementation Interface -- similar to what genStructM does. |
| g.Printf("@implementation %s%s {\n", g.namePrefix, obj.Name()) |
| g.Printf("}\n") |
| g.Printf("\n") |
| g.Printf("- (nonnull instancetype)initWithRef:(id)ref {\n") |
| g.Indent() |
| if isErrorType(obj.Type()) { |
| g.Printf("if (self) {\n") |
| g.Printf(" __ref = ref;\n") |
| g.Printf(" self = [super initWithDomain:@\"go\" code:1 userInfo:@{NSLocalizedDescriptionKey: [self error]}];\n") |
| g.Printf("}\n") |
| } else { |
| g.Printf("self = [super init];\n") |
| g.Printf("if (self) { __ref = ref; }\n") |
| } |
| g.Printf("return self;\n") |
| g.Outdent() |
| g.Printf("}\n") |
| g.Printf("\n") |
| |
| for _, m := range summary.callable { |
| if !g.isSigSupported(m.Type()) { |
| g.Printf("// skipped method %s.%s with unsupported parameter or return types\n\n", obj.Name(), m.Name()) |
| continue |
| } |
| s := g.funcSummary(nil, m) |
| g.Printf("- %s {\n", s.asMethod(g)) |
| g.Indent() |
| g.genFunc(s, obj.Name()) |
| g.Outdent() |
| g.Printf("}\n\n") |
| } |
| g.Printf("@end\n") |
| g.Printf("\n") |
| |
| return summary.implementable |
| } |
| |
| func (g *ObjcGen) genInterfaceMethodProxy(obj *types.TypeName, m *types.Func) { |
| oName := obj.Name() |
| s := g.funcSummary(nil, m) |
| g.genInterfaceMethodSignature(m, oName, false, g.paramName) |
| g.Indent() |
| g.Printf("@autoreleasepool {\n") |
| g.Indent() |
| g.Printf("%s* o = go_seq_objc_from_refnum(refnum);\n", g.refTypeBase(obj.Type())) |
| for _, p := range s.params { |
| g.genRead("_"+p.name, p.name, p.typ, modeTransient) |
| } |
| |
| // call method |
| for _, p := range s.retParams { |
| if isErrorType(p.typ) { |
| g.Printf("NSError* %s = nil;\n", p.name) |
| } else { |
| g.Printf("%s %s;\n", g.objcType(p.typ), p.name) |
| } |
| } |
| |
| if isErrorType(obj.Type()) && m.Name() == "Error" { |
| // As a special case, ObjC NSErrors are passed to Go pretending to implement the Go error interface. |
| // They don't actually have an Error method, so calls to to it needs to be rerouted. |
| g.Printf("%s = [o localizedDescription];\n", s.retParams[0].name) |
| } else { |
| if s.ret == "void" { |
| g.Printf("[o %s];\n", s.callMethod(g)) |
| } else if !s.returnsVal() { |
| g.Printf("%s returnVal = [o %s];\n", s.ret, s.callMethod(g)) |
| } else { |
| g.Printf("%s = [o %s];\n", s.retParams[0].name, s.callMethod(g)) |
| } |
| } |
| |
| if len(s.retParams) > 0 { |
| if len(s.retParams) == 1 && !isErrorType(s.retParams[0].typ) { |
| p := s.retParams[0] |
| g.genWrite(p.name, p.typ, modeRetained) |
| g.Printf("return _%s;\n", p.name) |
| } else { |
| var rets []string |
| for _, p := range s.retParams { |
| if isErrorType(p.typ) { |
| g.Printf("NSError *_%s = nil;\n", p.name) |
| if !s.returnsVal() { |
| g.Printf("if (!returnVal) {\n") |
| } else { |
| g.Printf("if (%s != nil) {\n", p.name) |
| } |
| g.Indent() |
| g.Printf("_%[1]s = %[1]s;\n", p.name) |
| g.Outdent() |
| g.Printf("}\n") |
| g.genWrite("_"+p.name, p.typ, modeRetained) |
| rets = append(rets, "__"+p.name) |
| } else { |
| g.genWrite(p.name, p.typ, modeRetained) |
| rets = append(rets, "_"+p.name) |
| } |
| } |
| if len(rets) > 1 { |
| g.Printf("cproxy%s_%s_%s_return _sres = {\n", g.pkgPrefix, oName, m.Name()) |
| g.Printf(" %s\n", strings.Join(rets, ", ")) |
| g.Printf("};\n") |
| g.Printf("return _sres;\n") |
| } else { |
| g.Printf("return %s;\n", rets[0]) |
| } |
| } |
| } |
| g.Outdent() |
| g.Printf("}\n") |
| g.Outdent() |
| g.Printf("}\n\n") |
| } |
| |
| // genRelease cleans up arguments that weren't copied in genWrite. |
| func (g *ObjcGen) genRelease(varName string, t types.Type, mode varMode) { |
| switch t := t.(type) { |
| case *types.Slice: |
| switch e := t.Elem().(type) { |
| case *types.Basic: |
| switch e.Kind() { |
| case types.Uint8: // Byte. |
| if mode == modeTransient { |
| // If the argument was not mutable, go_seq_from_objc_bytearray created a copy. |
| // Free it here. |
| g.Printf("if (![%s isKindOfClass:[NSMutableData class]]) {\n", varName) |
| g.Printf(" free(_%s.ptr);\n", varName) |
| g.Printf("}\n") |
| } |
| } |
| } |
| } |
| } |
| |
| func (g *ObjcGen) genStructH(obj *types.TypeName, t *types.Struct) { |
| doc := g.docs[obj.Name()] |
| g.objcdoc(doc.Doc()) |
| g.Printf("@interface %s%s : ", g.namePrefix, obj.Name()) |
| oinf := g.ostructs[obj] |
| var prots []string |
| if oinf != nil { |
| for _, sup := range oinf.supers { |
| if !sup.Protocol { |
| g.Printf(sup.Name) |
| } else { |
| prots = append(prots, sup.Name) |
| } |
| } |
| } else { |
| g.Printf("NSObject") |
| prots = append(prots, "goSeqRefInterface") |
| } |
| pT := types.NewPointer(obj.Type()) |
| for _, iface := range g.allIntf { |
| p := iface.obj.Pkg() |
| if g.Pkg != nil && g.Pkg != p { |
| // To avoid header include cycles, only declare implementation of interfaces |
| // from imported packages. TODO(elias.naur): Include every interface that |
| // doesn't introduce an include cycle. |
| found := false |
| for _, imp := range g.Pkg.Imports() { |
| if imp == p { |
| found = true |
| break |
| } |
| } |
| if !found { |
| continue |
| } |
| } |
| obj := iface.obj |
| if types.AssignableTo(pT, obj.Type()) { |
| n := fmt.Sprintf("%s%s", g.namePrefixOf(obj.Pkg()), obj.Name()) |
| prots = append(prots, n) |
| } |
| } |
| |
| if len(prots) > 0 { |
| g.Printf(" <%s>", strings.Join(prots, ", ")) |
| } |
| g.Printf(" {\n") |
| g.Printf("}\n") |
| g.Printf("@property(strong, readonly) _Nonnull id _ref;\n") |
| g.Printf("\n") |
| g.Printf("- (nonnull instancetype)initWithRef:(_Nonnull id)ref;\n") |
| cons := g.constructors[obj] |
| if oinf == nil { |
| for _, f := range cons { |
| if !g.isSigSupported(f.Type()) { |
| g.Printf("// skipped constructor %s.%s with unsupported parameter or return types\n\n", obj.Name(), f.Name()) |
| continue |
| } |
| g.genInitH(obj, f) |
| } |
| } |
| if oinf != nil || len(cons) == 0 { |
| // default constructor won't return nil |
| g.Printf("- (nonnull instancetype)init;\n") |
| } |
| |
| // accessors to exported fields. |
| for _, f := range exportedFields(t) { |
| if t := f.Type(); !g.isSupported(t) { |
| g.Printf("// skipped field %s.%s with unsupported type: %s\n\n", obj.Name(), f.Name(), t) |
| continue |
| } |
| name, typ := f.Name(), g.objcType(f.Type()) |
| g.objcdoc(doc.Member(f.Name())) |
| |
| // properties are atomic by default so explicitly say otherwise |
| g.Printf("@property (nonatomic) %s %s;\n", typ, objcNameReplacer(lowerFirst(name))) |
| } |
| |
| // exported methods |
| for _, m := range exportedMethodSet(types.NewPointer(obj.Type())) { |
| if !g.isSigSupported(m.Type()) { |
| g.Printf("// skipped method %s.%s with unsupported parameter or return types\n\n", obj.Name(), m.Name()) |
| continue |
| } |
| s := g.funcSummary(obj, m) |
| g.objcdoc(doc.Member(m.Name())) |
| g.Printf("- %s;\n", s.asMethod(g)) |
| } |
| g.Printf("@end\n") |
| } |
| |
| func (g *ObjcGen) objcdoc(doc string) { |
| if doc == "" { |
| return |
| } |
| g.Printf("/**\n * %s */\n", doc) |
| } |
| |
| func (g *ObjcGen) genStructM(obj *types.TypeName, t *types.Struct) { |
| fields := exportedFields(t) |
| methods := exportedMethodSet(types.NewPointer(obj.Type())) |
| |
| g.Printf("\n") |
| oinf := g.ostructs[obj] |
| g.Printf("@implementation %s%s {\n", g.namePrefix, obj.Name()) |
| g.Printf("}\n\n") |
| g.Printf("- (nonnull instancetype)initWithRef:(_Nonnull id)ref {\n") |
| g.Indent() |
| g.Printf("self = [super init];\n") |
| g.Printf("if (self) { __ref = ref; }\n") |
| g.Printf("return self;\n") |
| g.Outdent() |
| g.Printf("}\n\n") |
| cons := g.constructors[obj] |
| if oinf == nil { |
| for _, f := range cons { |
| if !g.isSigSupported(f.Type()) { |
| g.Printf("// skipped constructor %s.%s with unsupported parameter or return types\n\n", obj, f.Name()) |
| continue |
| } |
| g.genInitM(obj, f) |
| } |
| } |
| if oinf != nil || len(cons) == 0 { |
| g.Printf("- (nonnull instancetype)init {\n") |
| g.Indent() |
| g.Printf("self = [super init];\n") |
| g.Printf("if (self) {\n") |
| g.Indent() |
| g.Printf("__ref = go_seq_from_refnum(new_%s_%s());\n", g.pkgPrefix, obj.Name()) |
| g.Outdent() |
| g.Printf("}\n") |
| g.Printf("return self;\n") |
| g.Outdent() |
| g.Printf("}\n\n") |
| } |
| |
| for _, f := range fields { |
| if !g.isSupported(f.Type()) { |
| g.Printf("// skipped unsupported field %s with type %s\n\n", f.Name(), f.Type()) |
| continue |
| } |
| g.genGetter(obj.Name(), f) |
| g.genSetter(obj.Name(), f) |
| } |
| |
| for _, m := range methods { |
| if !g.isSigSupported(m.Type()) { |
| g.Printf("// skipped method %s.%s with unsupported parameter or return types\n\n", obj.Name(), m.Name()) |
| continue |
| } |
| s := g.funcSummary(obj, m) |
| g.Printf("- %s {\n", s.asMethod(g)) |
| g.Indent() |
| g.genFunc(s, obj.Name()) |
| g.Outdent() |
| g.Printf("}\n\n") |
| } |
| g.Printf("@end\n\n") |
| } |
| |
| func (g *ObjcGen) genInitH(obj *types.TypeName, f *types.Func) { |
| s := g.funcSummary(obj, f) |
| doc := g.docs[f.Name()] |
| g.objcdoc(doc.Doc()) |
| |
| // custom inits can return nil in Go so make them nullable |
| g.Printf("- (nullable instancetype)%s%s;\n", s.initName, s.asInitSignature(g)) |
| } |
| |
| func (g *ObjcGen) genInitM(obj *types.TypeName, f *types.Func) { |
| s := g.funcSummary(obj, f) |
| g.Printf("- (instancetype)%s%s {\n", s.initName, s.asInitSignature(g)) |
| g.Indent() |
| g.Printf("self = [super init];\n") |
| g.Printf("if (!self) return nil;\n") |
| for _, p := range s.params { |
| g.genWrite(p.name, p.typ, modeTransient) |
| } |
| // Constructors always return a mandatory *T and an optional error |
| if len(s.retParams) == 1 { |
| g.Printf("%s refnum = ", g.cgoType(s.retParams[0].typ)) |
| } else { |
| g.Printf("struct proxy%s__%s_return res = ", g.pkgPrefix, s.goname) |
| } |
| g.Printf("proxy%s__%s(", g.pkgPrefix, s.goname) |
| for i, p := range s.params { |
| if i > 0 { |
| g.Printf(", ") |
| } |
| g.Printf("_%s", p.name) |
| } |
| g.Printf(");\n") |
| for _, p := range s.params { |
| g.genRelease(p.name, p.typ, modeTransient) |
| } |
| if len(s.retParams) == 2 { |
| g.Printf("int32_t refnum = res.r0;\n") |
| g.Printf("GoSeqRef *_err = go_seq_from_refnum(res.r1);\n") |
| } |
| g.Printf("__ref = go_seq_from_refnum(refnum);\n") |
| if len(s.retParams) == 2 { |
| g.Printf("if (_err != NULL)\n") |
| g.Printf(" return nil;\n") |
| } |
| g.Printf("return self;\n") |
| g.Outdent() |
| g.Printf("}\n\n") |
| } |
| |
| func (g *ObjcGen) errorf(format string, args ...interface{}) { |
| g.err = append(g.err, fmt.Errorf(format, args...)) |
| } |
| |
| func (g *ObjcGen) refTypeBase(typ types.Type) string { |
| switch typ := typ.(type) { |
| case *types.Pointer: |
| if _, ok := typ.Elem().(*types.Named); ok { |
| return g.objcType(typ.Elem()) |
| } |
| case *types.Named: |
| n := typ.Obj() |
| if isObjcType(typ) { |
| return g.wrapMap[n.Name()].Name |
| } |
| if isErrorType(typ) || g.validPkg(n.Pkg()) { |
| switch typ.Underlying().(type) { |
| case *types.Interface, *types.Struct: |
| return g.namePrefixOf(n.Pkg()) + n.Name() |
| } |
| } |
| } |
| |
| // fallback to whatever objcType returns. This must not happen. |
| return g.objcType(typ) |
| } |
| |
| func (g *ObjcGen) objcParamType(t types.Type) string { |
| |
| switch typ := t.(type) { |
| case *types.Basic: |
| switch typ.Kind() { |
| case types.String, types.UntypedString: |
| return "NSString* _Nullable" |
| } |
| } |
| |
| return g.objcType(t) |
| |
| } |
| |
| func (g *ObjcGen) objcType(typ types.Type) string { |
| |
| if isErrorType(typ) { |
| return "NSError* _Nullable" |
| } |
| |
| switch typ := typ.(type) { |
| case *types.Basic: |
| switch typ.Kind() { |
| case types.Bool, types.UntypedBool: |
| return "BOOL" |
| case types.Int: |
| return "long" |
| case types.Int8: |
| return "int8_t" |
| case types.Int16: |
| return "int16_t" |
| case types.Int32, types.UntypedRune: // types.Rune |
| return "int32_t" |
| case types.Int64, types.UntypedInt: |
| return "int64_t" |
| case types.Uint8: |
| // byte is an alias of uint8, and the alias is lost. |
| return "byte" |
| case types.Uint16: |
| return "uint16_t" |
| case types.Uint32: |
| return "uint32_t" |
| case types.Uint64: |
| return "uint64_t" |
| case types.Float32: |
| return "float" |
| case types.Float64, types.UntypedFloat: |
| return "double" |
| case types.String, types.UntypedString: |
| return "NSString* _Nonnull" |
| default: |
| g.errorf("unsupported type: %s", typ) |
| return "TODO" |
| } |
| case *types.Slice: |
| elem := g.objcType(typ.Elem()) |
| // Special case: NSData seems to be a better option for byte slice. |
| if elem == "byte" { |
| return "NSData* _Nullable" |
| } |
| // TODO(hyangah): support other slice types: NSArray or CFArrayRef. |
| // Investigate the performance implication. |
| g.errorf("unsupported type: %s", typ) |
| return "TODO" |
| case *types.Pointer: |
| if _, ok := typ.Elem().(*types.Named); ok { |
| return g.objcType(typ.Elem()) + "* _Nullable" |
| } |
| g.errorf("unsupported pointer to type: %s", typ) |
| return "TODO" |
| case *types.Named: |
| n := typ.Obj() |
| if isObjcType(typ) { |
| w := g.wrapMap[n.Name()] |
| return w.ObjcType() |
| } |
| if !isErrorType(typ) && !g.validPkg(n.Pkg()) { |
| g.errorf("type %s is in package %s, which is not bound", n.Name(), n.Pkg().Name()) |
| return "TODO" |
| } |
| switch t := typ.Underlying().(type) { |
| case *types.Interface: |
| if makeIfaceSummary(t).implementable { |
| return "id<" + g.namePrefixOf(n.Pkg()) + n.Name() + "> _Nullable" |
| } else { |
| return g.namePrefixOf(n.Pkg()) + n.Name() + "* _Nullable" |
| } |
| case *types.Struct: |
| return g.namePrefixOf(n.Pkg()) + n.Name() |
| } |
| g.errorf("unsupported, named type %s", typ) |
| return "TODO" |
| default: |
| g.errorf("unsupported type: %#+v, %s", typ, typ) |
| return "TODO" |
| } |
| } |
| |
| // embeddedObjcTypes returns the possible empty list of Objc types embedded |
| // in the given struct type. |
| func embeddedObjcTypes(t *types.Struct) []string { |
| typeSet := make(map[string]struct{}) |
| var typs []string |
| for i := 0; i < t.NumFields(); i++ { |
| f := t.Field(i) |
| if !f.Exported() { |
| continue |
| } |
| if ft := f.Type(); isObjcType(ft) { |
| name := ft.(*types.Named).Obj().Name() |
| if _, exists := typeSet[name]; !exists { |
| typeSet[name] = struct{}{} |
| typs = append(typs, name) |
| } |
| } |
| } |
| return typs |
| } |
| |
| func isObjcType(t types.Type) bool { |
| return typePkgFirstElem(t) == "ObjC" |
| } |
| |
| var objcNameReplacer = newNameSanitizer([]string{ |
| "bool", "bycopy", "byref", "char", "const", "double", "float", |
| "id", "in", "init", "inout", "int", "long", "nil", "oneway", |
| "out", "self", "short", "signed", "super", "unsigned", "void", |
| "volatile"}) |
| |
| const ( |
| objcPreamble = `// Objective-C API for talking to %[1]s Go package. |
| // gobind %[2]s %[3]s |
| // |
| // File is generated by gobind. Do not edit. |
| |
| ` |
| ) |
