func (c *PkgContext) loadStruct(array, target string, s *types.Struct) {
view := c.newVariable("_view")
c.Printf("%s = new DataView(%s.buffer, %s.byteOffset);", view, array, array)
var fields []*types.Var
var collectFields func(s *types.Struct, path string)
collectFields = func(s *types.Struct, path string) {
for i := 0; i < s.NumFields(); i++ {
field := s.Field(i)
if fs, isStruct := field.Type().Underlying().(*types.Struct); isStruct {
collectFields(fs, path+"."+field.Name())
continue
}
fields = append(fields, types.NewVar(0, nil, path+"."+field.Name(), field.Type()))
}
}
collectFields(s, target)
offsets := sizes32.Offsetsof(fields)
for i, field := range fields {
switch t := field.Type().Underlying().(type) {
case *types.Basic:
if t.Info()&types.IsNumeric != 0 {
if is64Bit(t) {
c.Printf("%s = new %s(%s.getUint32(%d, true), %s.getUint32(%d, true));", field.Name(), c.typeName(field.Type()), view, offsets[i]+4, view, offsets[i])
continue
}
c.Printf("%s = %s.get%s(%d, true);", field.Name(), view, toJavaScriptType(t), offsets[i])
}
continue
case *types.Array:
c.Printf("%s = new %s(%s.buffer, Go$min(%s.byteOffset + %d, %s.buffer.byteLength));", field.Name(), toArrayType(t.Elem()), array, array, offsets[i], array)
continue
}
c.Printf("// skipped: %s %s", field.Name(), field.Type().String())
}
}
func fieldName(t *types.Struct, i int) string {
name := t.Field(i).Name()
if name == "_" || reservedKeywords[name] {
return fmt.Sprintf("%s$%d", name, i)
}
return name
}
func (c *funcContext) loadStruct(array, target string, s *types.Struct) string {
view := c.newVariable("_view")
code := fmt.Sprintf("%s = new DataView(%s.buffer, %s.byteOffset)", view, array, array)
var fields []*types.Var
var collectFields func(s *types.Struct, path string)
collectFields = func(s *types.Struct, path string) {
for i := 0; i < s.NumFields(); i++ {
field := s.Field(i)
if fs, isStruct := field.Type().Underlying().(*types.Struct); isStruct {
collectFields(fs, path+"."+fieldName(s, i))
continue
}
fields = append(fields, types.NewVar(0, nil, path+"."+fieldName(s, i), field.Type()))
}
}
collectFields(s, target)
offsets := sizes32.Offsetsof(fields)
for i, field := range fields {
switch t := field.Type().Underlying().(type) {
case *types.Basic:
if t.Info()&types.IsNumeric != 0 {
if is64Bit(t) {
code += fmt.Sprintf(", %s = new %s(%s.getUint32(%d, true), %s.getUint32(%d, true))", field.Name(), c.typeName(field.Type()), view, offsets[i]+4, view, offsets[i])
break
}
code += fmt.Sprintf(", %s = %s.get%s(%d, true)", field.Name(), view, toJavaScriptType(t), offsets[i])
}
case *types.Array:
code += fmt.Sprintf(`, %s = new ($nativeArray("%s"))(%s.buffer, $min(%s.byteOffset + %d, %s.buffer.byteLength))`, field.Name(), typeKind(t.Elem()), array, array, offsets[i], array)
}
}
return code
}
// matchStructArgType reports whether all the elements of the struct match the expected
// type. For instance, with "%d" all the elements must be printable with the "%d" format.
func (f *File) matchStructArgType(t printfArgType, typ *types.Struct, arg ast.Expr, inProgress map[types.Type]bool) bool {
for i := 0; i < typ.NumFields(); i++ {
if !f.matchArgTypeInternal(t, typ.Field(i).Type(), arg, inProgress) {
return false
}
}
return true
}
func fieldIndex(s *types.Struct, name string) int {
for i := 0; i < s.NumFields(); i++ {
f := s.Field(i)
if f.Name() == name {
return i
}
}
return -1
}
func (m *TypeMap) descriptorStruct(t *types.Struct, name string) TypeDebugDescriptor {
members := make([]DebugDescriptor, t.NumFields())
for i := range members {
f := t.Field(i)
member := NewMemberDerivedType(m.TypeDebugDescriptor(f.Type()))
member.Name = f.Name()
members[i] = member
}
dt := NewStructCompositeType(members)
dt.Name = name
return dt
}
// For a given struct type and (promoted) field Id, findEmbeddedField
// returns the path of implicit anonymous field selections, and the
// field index of the explicit (=outermost) selection.
//
// TODO(gri): if go/types/operand.go's lookupFieldBreadthFirst were to
// record (e.g. call a client-provided callback) the implicit field
// selection path discovered for a particular ast.SelectorExpr, we could
// eliminate this function.
//
func findPromotedField(st *types.Struct, id Id) (*anonFieldPath, int) {
// visited records the types that have been searched already.
// Invariant: keys are all *types.Named.
// (types.Type is not a sound map key in general.)
visited := make(map[types.Type]bool)
var list, next []*anonFieldPath
i := 0
st.ForEachField(func(f *types.Field) {
if f.IsAnonymous {
list = append(list, &anonFieldPath{nil, i, f})
}
i++
})
// Search the current level if there is any work to do and collect
// embedded types of the next lower level in the next list.
for {
// look for name in all types at this level
for _, node := range list {
typ := node.field.Type.Deref().(*types.Named)
if visited[typ] {
continue
}
visited[typ] = true
switch typ := typ.Underlying().(type) {
case *types.Struct:
for i, n := 0, typ.NumFields(); i < n; i++ {
f := typ.Field(i)
if MakeId(f.Name, f.Pkg) == id {
return node, i
}
}
i := 0
typ.ForEachField(func(f *types.Field) {
if f.IsAnonymous {
next = append(next, &anonFieldPath{node, i, f})
}
i++
})
}
}
if len(next) == 0 {
panic("field not found: " + id.String())
}
// No match so far.
list, next = next, list[:0] // reuse arrays
}
panic("unreachable")
}
func (tm *llvmTypeMap) structLLVMType(s *types.Struct, name string) llvm.Type {
typ, ok := tm.types.At(s).(llvm.Type)
if !ok {
typ = llvm.GlobalContext().StructCreateNamed(name)
tm.types.Set(s, typ)
elements := make([]llvm.Type, s.NumFields())
for i := range elements {
f := s.Field(i)
ft := f.Type()
elements[i] = tm.ToLLVM(ft)
}
typ.StructSetBody(elements, false)
}
return typ
}
func (tm *LLVMTypeMap) structLLVMType(tstr string, s *types.Struct) llvm.Type {
typ, ok := tm.types[tstr]
if !ok {
typ = llvm.GlobalContext().StructCreateNamed("")
tm.types[tstr] = typ
elements := make([]llvm.Type, s.NumFields())
for i := range elements {
f := s.Field(i)
ft := f.Type
elements[i] = tm.ToLLVM(ft)
}
typ.StructSetBody(elements, false)
}
return typ
}
func (w *Walker) emitStructType(name string, typ *types.Struct) {
typeStruct := fmt.Sprintf("type %s struct", name)
w.emitf(typeStruct)
defer w.pushScope(typeStruct)()
for i := 0; i < typ.NumFields(); i++ {
f := typ.Field(i)
if !f.IsExported() {
continue
}
typ := f.Type()
if f.Anonymous() {
w.emitf("embedded %s", w.typeString(typ))
continue
}
w.emitf("%s %s", f.Name(), w.typeString(typ))
}
}
func (tm *TypeMap) structRuntimeType(s *types.Struct) (global, ptr llvm.Value) {
rtype := tm.makeRtype(s, reflect.Struct)
structType := llvm.ConstNull(tm.runtime.structType.llvm)
structType = llvm.ConstInsertValue(structType, rtype, []uint32{0})
global, ptr = tm.makeRuntimeTypeGlobal(structType, typeString(s))
tm.types.Set(s, runtimeTypeInfo{global, ptr})
fieldVars := make([]*types.Var, s.NumFields())
for i := range fieldVars {
fieldVars[i] = s.Field(i)
}
offsets := tm.Offsetsof(fieldVars)
structFields := make([]llvm.Value, len(fieldVars))
for i := range structFields {
field := fieldVars[i]
structField := llvm.ConstNull(tm.runtime.structField.llvm)
if !field.Anonymous() {
name := tm.globalStringPtr(field.Name())
name = llvm.ConstBitCast(name, tm.runtime.structField.llvm.StructElementTypes()[0])
structField = llvm.ConstInsertValue(structField, name, []uint32{0})
}
if !ast.IsExported(field.Name()) {
pkgpath := tm.globalStringPtr(field.Pkg().Path())
pkgpath = llvm.ConstBitCast(pkgpath, tm.runtime.structField.llvm.StructElementTypes()[1])
structField = llvm.ConstInsertValue(structField, pkgpath, []uint32{1})
}
fieldType := tm.ToRuntime(field.Type())
structField = llvm.ConstInsertValue(structField, fieldType, []uint32{2})
if tag := s.Tag(i); tag != "" {
tag := tm.globalStringPtr(tag)
tag = llvm.ConstBitCast(tag, tm.runtime.structField.llvm.StructElementTypes()[3])
structField = llvm.ConstInsertValue(structField, tag, []uint32{3})
}
offset := llvm.ConstInt(tm.runtime.structField.llvm.StructElementTypes()[4], uint64(offsets[i]), false)
structField = llvm.ConstInsertValue(structField, offset, []uint32{4})
structFields[i] = structField
}
structFieldsSliceType := tm.runtime.structType.llvm.StructElementTypes()[1]
structFieldsSlice := tm.makeSlice(structFields, structFieldsSliceType)
structType = llvm.ConstInsertValue(structType, structFieldsSlice, []uint32{1})
global.SetInitializer(structType)
return global, ptr
}
