func needWrapType(typ types.Type) bool {
switch typ := typ.(type) {
case *types.Basic:
return false
case *types.Struct:
return true
case *types.Named:
switch ut := typ.Underlying().(type) {
case *types.Basic:
return false
default:
return needWrapType(ut)
}
case *types.Array:
return true
case *types.Map:
return true
case *types.Slice:
return true
case *types.Interface:
wrap := true
if typ.Underlying() == universe.syms["error"].GoType().Underlying() {
wrap = false
}
return wrap
case *types.Signature:
return true
case *types.Pointer:
return needWrapType(typ.Elem())
}
return false
}
func (f Field) UnderlyingTarget() fieldser {
var t types.Type
switch v := f.v.Type().(type) {
case elemer:
t = v.Elem()
case *types.Named:
t = v
}
if _, ok := t.(underlyinger); !ok {
return nil
}
u := t.(underlyinger).Underlying()
switch t := u.(type) {
case *types.Struct:
return fields{
g: f.gen,
target: t,
}
case *types.Pointer:
return fields{
g: f.gen,
target: t.Elem().(*types.Named).Underlying().(*types.Struct),
}
}
return nil
}
// MethodSet returns the method set of type T. It is thread-safe.
//
// If cache is nil, this function is equivalent to types.NewMethodSet(T).
// Utility functions can thus expose an optional *MethodSetCache
// parameter to clients that care about performance.
//
func (cache *MethodSetCache) MethodSet(T types.Type) *types.MethodSet {
if cache == nil {
return types.NewMethodSet(T)
}
cache.mu.Lock()
defer cache.mu.Unlock()
switch T := T.(type) {
case *types.Named:
return cache.lookupNamed(T).value
case *types.Pointer:
if N, ok := T.Elem().(*types.Named); ok {
return cache.lookupNamed(N).pointer
}
}
// all other types
// (The map uses pointer equivalence, not type identity.)
mset := cache.others[T]
if mset == nil {
mset = types.NewMethodSet(T)
if cache.others == nil {
cache.others = make(map[types.Type]*types.MethodSet)
}
cache.others[T] = mset
}
return mset
}
// isSupported returns whether the generators can handle the type.
func (g *generator) isSupported(t types.Type) bool {
if isErrorType(t) {
return true
}
switch t := t.(type) {
case *types.Basic:
return true
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
return e.Kind() == types.Uint8
}
case *types.Pointer:
switch t := t.Elem().(type) {
case *types.Named:
return g.validPkg(t.Obj().Pkg())
}
case *types.Named:
switch t.Underlying().(type) {
case *types.Interface, *types.Pointer:
return g.validPkg(t.Obj().Pkg())
}
}
return false
}
// cgoType returns the name of a Cgo type suitable for converting a value of
// the given type.
func (g *generator) cgoType(t types.Type) string {
if isErrorType(t) {
return g.cgoType(types.Typ[types.String])
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.Bool, types.UntypedBool:
return "char"
case types.Int:
return "nint"
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: // types.Byte
return "uint8_t"
// TODO(crawshaw): case types.Uint, types.Uint16, types.Uint32, types.Uint64:
case types.Float32:
return "float"
case types.Float64, types.UntypedFloat:
return "double"
case types.String:
return "nstring"
default:
g.errorf("unsupported basic type: %s", t)
}
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
return "nbyteslice"
default:
g.errorf("unsupported slice type: %s", t)
}
default:
g.errorf("unsupported slice type: %s", t)
}
case *types.Pointer:
if _, ok := t.Elem().(*types.Named); ok {
return g.cgoType(t.Elem())
}
g.errorf("unsupported pointer to type: %s", t)
case *types.Named:
return "int32_t"
default:
g.errorf("unsupported type: %s", t)
}
return "TODO"
}
func (g *goGen) genWrite(toVar, fromVar string, t types.Type, mode varMode) {
if isErrorType(t) {
g.Printf("var %s_str string\n", toVar)
g.Printf("if %s == nil {\n", fromVar)
g.Printf(" %s_str = \"\"\n", toVar)
g.Printf("} else {\n")
g.Printf(" %s_str = %s.Error()\n", toVar, fromVar)
g.Printf("}\n")
g.genWrite(toVar, toVar+"_str", types.Typ[types.String], mode)
return
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.String:
g.Printf("%s := encodeString(%s)\n", toVar, fromVar)
case types.Bool:
g.Printf("var %s C.%s = 0\n", toVar, g.cgoType(t))
g.Printf("if %s { %s = 1 }\n", fromVar, toVar)
default:
g.Printf("%s := C.%s(%s)\n", toVar, g.cgoType(t), fromVar)
}
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
g.Printf("%s := fromSlice(%s, %v)\n", toVar, fromVar, mode == modeRetained)
default:
g.errorf("unsupported type: %s", t)
}
default:
g.errorf("unsupported type: %s", t)
}
case *types.Pointer:
// TODO(crawshaw): test *int
// TODO(crawshaw): test **Generator
switch t := t.Elem().(type) {
case *types.Named:
g.genToRefNum(toVar, fromVar)
default:
g.errorf("unsupported type %s", t)
}
case *types.Named:
switch u := t.Underlying().(type) {
case *types.Interface, *types.Pointer:
g.genToRefNum(toVar, fromVar)
default:
g.errorf("unsupported, direct named type %s: %s", t, u)
}
default:
g.errorf("unsupported type %s", t)
}
}
// jniType returns a string that can be used as a JNI type.
func (g *javaGen) jniType(T types.Type) string {
if isErrorType(T) {
// The error type is usually translated into an exception in
// Java, however the type can be exposed in other ways, such
// as an exported field.
return g.jniType(types.Typ[types.String])
}
switch T := T.(type) {
case *types.Basic:
switch T.Kind() {
case types.Bool, types.UntypedBool:
return "jboolean"
case types.Int:
return "jlong"
case types.Int8:
return "jbyte"
case types.Int16:
return "jshort"
case types.Int32, types.UntypedRune: // types.Rune
return "jint"
case types.Int64, types.UntypedInt:
return "jlong"
case types.Uint8: // types.Byte
// TODO(crawshaw): Java bytes are signed, so this is
// questionable, but vital.
return "jbyte"
// TODO(crawshaw): case types.Uint, types.Uint16, types.Uint32, types.Uint64:
case types.Float32:
return "jfloat"
case types.Float64, types.UntypedFloat:
return "jdouble"
case types.String, types.UntypedString:
return "jstring"
default:
g.errorf("unsupported basic type: %s", T)
return "TODO"
}
case *types.Slice:
return "jbyteArray"
case *types.Pointer:
if _, ok := T.Elem().(*types.Named); ok {
return g.jniType(T.Elem())
}
g.errorf("unsupported pointer to type: %s", T)
case *types.Named:
return "jobject"
default:
g.errorf("unsupported jniType: %#+v, %s\n", T, T)
}
return "TODO"
}
func isExported(t types.Type) bool {
if isErrorType(t) {
return true
}
switch t := t.(type) {
case *types.Basic:
return true
case *types.Named:
return t.Obj().Exported()
case *types.Pointer:
return isExported(t.Elem())
default:
return true
}
}
func (g *goGen) genWrite(valName, seqName string, T types.Type) {
if isErrorType(T) {
g.Printf("if %s == nil {\n", valName)
g.Printf(" %s.WriteString(\"\");\n", seqName)
g.Printf("} else {\n")
g.Printf(" %s.WriteString(%s.Error());\n", seqName, valName)
g.Printf("}\n")
return
}
switch T := T.(type) {
case *types.Pointer:
// TODO(crawshaw): test *int
// TODO(crawshaw): test **Generator
switch T := T.Elem().(type) {
case *types.Named:
obj := T.Obj()
if obj.Pkg() != g.pkg {
g.errorf("type %s not defined in package %s", T, g.pkg)
return
}
g.Printf("%s.WriteGoRef(%s)\n", seqName, valName)
default:
g.errorf("unsupported type %s", T)
}
case *types.Named:
switch u := T.Underlying().(type) {
case *types.Interface, *types.Pointer:
g.Printf("%s.WriteGoRef(%s)\n", seqName, valName)
default:
g.errorf("unsupported, direct named type %s: %s", T, u)
}
default:
g.Printf("%s.Write%s(%s);\n", seqName, seqType(T), valName)
}
}
func (g *javaGen) genRead(resName, seqName string, T types.Type) {
switch T := T.(type) {
case *types.Pointer:
// TODO(crawshaw): test *int
// TODO(crawshaw): test **Generator
switch T := T.Elem().(type) {
case *types.Named:
o := T.Obj()
if o.Pkg() != g.pkg {
g.errorf("type %s not defined in %s", T, g.pkg)
return
}
g.Printf("%s = new %s(%s.readRef());\n", resName, o.Name(), seqName)
default:
g.errorf("unsupported type %s", T)
}
case *types.Named:
switch T.Underlying().(type) {
case *types.Interface, *types.Pointer:
o := T.Obj()
if o.Pkg() != g.pkg {
g.errorf("type %s not defined in %s", T, g.pkg)
return
}
g.Printf("%s = new %s.Proxy(%s.readRef());\n", resName, o.Name(), seqName)
default:
g.errorf("unsupported, direct named type %s", T)
}
default:
g.Printf("%s = %s.read%s();\n", resName, seqName, seqType(T))
}
}
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 *javaGen) genCToJava(toName, fromName string, t types.Type, mode varMode) {
if isErrorType(t) {
g.genCToJava(toName, fromName, types.Typ[types.String], mode)
return
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.String:
g.Printf("jstring %s = go_seq_to_java_string(env, %s);\n", toName, fromName)
case types.Bool:
g.Printf("jboolean %s = %s ? JNI_TRUE : JNI_FALSE;\n", toName, fromName)
default:
g.Printf("%s %s = (%s)%s;\n", g.jniType(t), toName, g.jniType(t), fromName)
}
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
g.Printf("jbyteArray %s = go_seq_to_java_bytearray(env, %s, %d);\n", toName, fromName, g.toCFlag(mode == modeRetained))
default:
g.errorf("unsupported type: %s", t)
}
default:
g.errorf("unsupported type: %s", t)
}
case *types.Pointer:
// TODO(crawshaw): test *int
// TODO(crawshaw): test **Generator
switch t := t.Elem().(type) {
case *types.Named:
g.genFromRefnum(toName, fromName, t, t.Obj())
default:
g.errorf("unsupported type %s", t)
}
case *types.Named:
switch t.Underlying().(type) {
case *types.Interface, *types.Pointer:
g.genFromRefnum(toName, fromName, t, t.Obj())
default:
g.errorf("unsupported, direct named type %s", t)
}
default:
g.Printf("%s %s = (%s)%s;\n", g.jniType(t), toName, g.jniType(t), fromName)
}
}
// jniType returns a string that can be used as a JNI type.
func (g *JavaGen) jniType(T types.Type) string {
switch T := T.(type) {
case *types.Basic:
switch T.Kind() {
case types.Bool, types.UntypedBool:
return "jboolean"
case types.Int:
return "jlong"
case types.Int8:
return "jbyte"
case types.Int16:
return "jshort"
case types.Int32, types.UntypedRune: // types.Rune
return "jint"
case types.Int64, types.UntypedInt:
return "jlong"
case types.Uint8: // types.Byte
// TODO(crawshaw): Java bytes are signed, so this is
// questionable, but vital.
return "jbyte"
// TODO(crawshaw): case types.Uint, types.Uint16, types.Uint32, types.Uint64:
case types.Float32:
return "jfloat"
case types.Float64, types.UntypedFloat:
return "jdouble"
case types.String, types.UntypedString:
return "jstring"
default:
g.errorf("unsupported basic type: %s", T)
return "TODO"
}
case *types.Slice:
return "jbyteArray"
case *types.Pointer:
if _, ok := T.Elem().(*types.Named); ok {
return g.jniType(T.Elem())
}
g.errorf("unsupported pointer to type: %s", T)
case *types.Named:
return "jobject"
default:
g.errorf("unsupported jniType: %#+v, %s\n", T, T)
}
return "TODO"
}
func (g *objcGen) genRead(toName, fromName string, t types.Type, mode varMode) {
if isErrorType(t) {
g.genRead(toName, fromName, types.Typ[types.String], mode)
return
}
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, g.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)
}
}
// store stores value v of type T into *addr.
func store(T types.Type, addr *value, v value) {
switch T := T.Underlying().(type) {
case *types.Struct:
lhs := (*addr).(structure)
rhs := v.(structure)
for i := range lhs {
store(T.Field(i).Type(), &lhs[i], rhs[i])
}
case *types.Array:
lhs := (*addr).(array)
rhs := v.(array)
for i := range lhs {
store(T.Elem(), &lhs[i], rhs[i])
}
default:
*addr = v
}
}
func isRefType(t types.Type) bool {
if isErrorType(t) {
return false
}
switch t := t.(type) {
case *types.Named:
switch u := t.Underlying().(type) {
case *types.Interface:
return true
default:
panic(fmt.Sprintf("unsupported named type: %s / %T", u, u))
}
case *types.Pointer:
return isRefType(t.Elem())
default:
return false
}
}
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 n.Pkg() == g.pkg {
switch typ.Underlying().(type) {
case *types.Interface, *types.Struct:
return g.namePrefix + n.Name()
}
}
}
// fallback to whatever objcType returns. This must not happen.
return g.objcType(typ)
}
func (g *javaGen) jniCallType(t types.Type) string {
if isErrorType(t) {
return g.jniCallType(types.Typ[types.String])
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.Bool, types.UntypedBool:
return "Boolean"
case types.Int:
return "Long"
case types.Int8, types.Uint8: // types.Byte
return "Byte"
case types.Int16:
return "Short"
case types.Int32, types.UntypedRune: // types.Rune
return "Int"
case types.Int64, types.UntypedInt:
return "Long"
case types.Float32:
return "Float"
case types.Float64, types.UntypedFloat:
return "Double"
case types.String, types.UntypedString:
return "Object"
default:
g.errorf("unsupported basic type: %s", t)
}
case *types.Slice:
return "Object"
case *types.Pointer:
if _, ok := t.Elem().(*types.Named); ok {
return g.jniCallType(t.Elem())
}
g.errorf("unsupported pointer to type: %s", t)
case *types.Named:
return "Object"
default:
return "Object"
}
return "TODO"
}
// load returns the value of type T in *addr.
func load(T types.Type, addr *value) value {
switch T := T.Underlying().(type) {
case *types.Struct:
v := (*addr).(structure)
a := make(structure, len(v))
for i := range a {
a[i] = load(T.Field(i).Type(), &v[i])
}
return a
case *types.Array:
v := (*addr).(array)
a := make(array, len(v))
for i := range a {
a[i] = load(T.Elem(), &v[i])
}
return a
default:
return *addr
}
}
// typeOKForCgoCall returns true if the type of arg is OK to pass to a
// C function using cgo. This is not true for Go types with embedded
// pointers.
func typeOKForCgoCall(t types.Type) bool {
if t == nil {
return true
}
switch t := t.Underlying().(type) {
case *types.Chan, *types.Map, *types.Signature, *types.Slice:
return false
case *types.Pointer:
return typeOKForCgoCall(t.Elem())
case *types.Array:
return typeOKForCgoCall(t.Elem())
case *types.Struct:
for i := 0; i < t.NumFields(); i++ {
if !typeOKForCgoCall(t.Field(i).Type()) {
return false
}
}
}
return true
}
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)
}
// genRelease cleans up arguments that weren't copied in genJavaToC.
func (g *JavaGen) genRelease(varName string, t types.Type, mode varMode) {
switch t := t.(type) {
case *types.Basic:
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
if mode == modeTransient {
g.Printf("go_seq_release_byte_array(env, %s, _%s.ptr);\n", varName, varName)
}
}
}
}
}
// javaType returns a string that can be used as a Java type.
func (g *javaGen) javaType(T types.Type) string {
switch T := T.(type) {
case *types.Basic:
switch T.Kind() {
case types.Bool:
return "boolean"
case types.Int:
return "long"
case types.Int8:
return "byte"
case types.Int16:
return "short"
case types.Int32:
return "int"
case types.Int64:
return "long"
case types.Uint8:
// TODO(crawshaw): Java bytes are signed, so this is
// questionable, but vital.
return "byte"
// TODO(crawshaw): case types.Uint, types.Uint16, types.Uint32, types.Uint64:
case types.Float32:
return "float"
case types.Float64:
return "double"
case types.String:
return "String"
default:
g.errorf("unsupported return type: %s", T)
return "TODO"
}
case *types.Slice:
elem := g.javaType(T.Elem())
return elem + "[]"
case *types.Pointer:
if _, ok := T.Elem().(*types.Named); ok {
return g.javaType(T.Elem())
}
panic(fmt.Sprintf("unsupporter pointer to type: %s", T))
case *types.Named:
n := T.Obj()
if n.Pkg() != g.pkg {
panic(fmt.Sprintf("type %s is in package %s, must be defined in package %s", n.Name(), n.Pkg().Name(), g.pkg.Name()))
}
// TODO(crawshaw): more checking here
return n.Name()
default:
g.errorf("unsupported javaType: %#+v, %s\n", T, T)
return "TODO"
}
}
// 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")
}
}
}
}
}
// genRelease cleans up arguments that weren't copied in genJavaToC.
func (g *javaGen) genRelease(varName string, t types.Type, mode varMode) {
if isErrorType(t) {
g.genRelease(varName, types.Typ[types.String], mode)
return
}
switch t := t.(type) {
case *types.Basic:
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
if mode == modeTransient {
g.Printf("if (_%s.ptr != NULL) {\n", varName)
g.Printf(" (*env)->ReleaseByteArrayElements(env, %s, _%s.ptr, 0);\n", varName, varName)
g.Printf("}\n")
}
}
}
}
}
func (g *javaGen) genJavaToC(varName string, t types.Type, mode varMode) {
if isErrorType(t) {
g.genJavaToC(varName, types.Typ[types.String], mode)
return
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.String:
g.Printf("nstring _%s = go_seq_from_java_string(env, %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_java_bytearray(env, %s, %d);\n", varName, varName, g.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.Printf("int32_t _%s = go_seq_to_refnum(env, %s);\n", varName, varName)
default:
g.errorf("unsupported named type: %s / %T", u, u)
}
case *types.Pointer:
g.Printf("int32_t _%s = go_seq_to_refnum(env, %s);\n", varName, varName)
default:
g.Printf("%s _%s = (%s)%s;\n", g.cgoType(t), varName, g.cgoType(t), varName)
}
}
func (g *javaGen) jniSigType(T types.Type) string {
if isErrorType(T) {
return g.jniSigType(types.Typ[types.String])
}
switch T := T.(type) {
case *types.Basic:
switch T.Kind() {
case types.Bool, types.UntypedBool:
return "Z"
case types.Int:
return "J"
case types.Int8:
return "B"
case types.Int16:
return "S"
case types.Int32, types.UntypedRune: // types.Rune
return "I"
case types.Int64, types.UntypedInt:
return "J"
case types.Uint8: // types.Byte
return "B"
case types.Float32:
return "F"
case types.Float64, types.UntypedFloat:
return "D"
case types.String, types.UntypedString:
return "Ljava/lang/String;"
default:
g.errorf("unsupported basic type: %s", T)
return "TODO"
}
case *types.Slice:
return "[" + g.jniSigType(T.Elem())
case *types.Pointer:
if _, ok := T.Elem().(*types.Named); ok {
return g.jniSigType(T.Elem())
}
g.errorf("unsupported pointer to type: %s", T)
case *types.Named:
return "L" + g.jniClassSigPrefix(T.Obj().Pkg()) + T.Obj().Name() + ";"
default:
g.errorf("unsupported jniType: %#+v, %s\n", T, T)
}
return "TODO"
}
// javaType returns a string that can be used as a Java type.
func (g *JavaGen) javaType(T types.Type) string {
if isErrorType(T) {
// The error type is usually translated into an exception in
// Java, however the type can be exposed in other ways, such
// as an exported field.
return "java.lang.Exception"
} else if isJavaType(T) {
return classNameFor(T)
}
switch T := T.(type) {
case *types.Basic:
return g.javaBasicType(T)
case *types.Slice:
elem := g.javaType(T.Elem())
return elem + "[]"
case *types.Pointer:
if _, ok := T.Elem().(*types.Named); ok {
return g.javaType(T.Elem())
}
g.errorf("unsupported pointer to type: %s", T)
case *types.Named:
n := T.Obj()
nPkg := n.Pkg()
if !isErrorType(T) && !g.validPkg(nPkg) {
g.errorf("type %s is in %s, which is not bound", n.Name(), nPkg)
break
}
// TODO(crawshaw): more checking here
if nPkg != g.Pkg {
return fmt.Sprintf("%s.%s", g.javaPkgName(nPkg), n.Name())
} else {
return n.Name()
}
default:
g.errorf("unsupported javaType: %#+v, %s\n", T, T)
}
return "TODO"
}
func (f *File) validParamType(typ types.Type) *Error {
if e := f.validVarDeclType(typ); e != nil {
switch typ.(type) {
default:
return e
case *types.Pointer:
typ := typ.(*types.Pointer)
return f.validParamType(typ.Elem())
case *types.Slice:
typ := typ.(*types.Slice)
return f.validParamType(typ.Elem())
case *types.Array:
typ := typ.(*types.Array)
return f.validParamType(typ.Elem())
case *types.Named:
/*named, ok := typ.(*types.Named)
if !ok {
panic("ERROR can't cast to named type")
}
tname := named.Obj()
i := Int(0)
var i4 Int4
ivar := &i
simdIntVar := reflect.TypeOf(ivar)
i4var := &i4
simdInt4Var := reflect.TypeOf(i4var)*/
/*switch tname.Name() {
default:
return e
case simdIntVar.Name():
return nil
case simdInt4Var.Name():
return nil
}*/
return e
}
}
return nil
}
func (p *exporter) typ(t types.Type) {
if t == nil {
log.Fatalf("gcimporter: nil type")
}
// Possible optimization: Anonymous pointer types *T where
// T is a named type are common. We could canonicalize all
// such types *T to a single type PT = *T. This would lead
// to at most one *T entry in typIndex, and all future *T's
// would be encoded as the respective index directly. Would
// save 1 byte (pointerTag) per *T and reduce the typIndex
// size (at the cost of a canonicalization map). We can do
// this later, without encoding format change.
// if we saw the type before, write its index (>= 0)
if i, ok := p.typIndex[t]; ok {
p.index('T', i)
return
}
// otherwise, remember the type, write the type tag (< 0) and type data
if trackAllTypes {
if trace {
p.tracef("T%d = {>\n", len(p.typIndex))
defer p.tracef("<\n} ")
}
p.typIndex[t] = len(p.typIndex)
}
switch t := t.(type) {
case *types.Named:
if !trackAllTypes {
// if we don't track all types, track named types now
p.typIndex[t] = len(p.typIndex)
}
p.tag(namedTag)
p.pos(t.Obj())
p.qualifiedName(t.Obj())
p.typ(t.Underlying())
if !types.IsInterface(t) {
p.assocMethods(t)
}
case *types.Array:
p.tag(arrayTag)
p.int64(t.Len())
p.typ(t.Elem())
case *types.Slice:
p.tag(sliceTag)
p.typ(t.Elem())
case *dddSlice:
p.tag(dddTag)
p.typ(t.elem)
case *types.Struct:
p.tag(structTag)
p.fieldList(t)
case *types.Pointer:
p.tag(pointerTag)
p.typ(t.Elem())
case *types.Signature:
p.tag(signatureTag)
p.paramList(t.Params(), t.Variadic())
p.paramList(t.Results(), false)
case *types.Interface:
p.tag(interfaceTag)
p.iface(t)
case *types.Map:
p.tag(mapTag)
p.typ(t.Key())
p.typ(t.Elem())
case *types.Chan:
p.tag(chanTag)
p.int(int(3 - t.Dir())) // hack
p.typ(t.Elem())
default:
log.Fatalf("gcimporter: unexpected type %T: %s", t, t)
}
}
