// returns the size of a type, works only for TypeExact
func TypeSize(ti *gi.TypeInfo, flags TypeFlags) int {
ptrsize := int(unsafe.Sizeof(unsafe.Pointer(nil)))
switch tag := ti.Tag(); tag {
case gi.TYPE_TAG_VOID:
if ti.IsPointer() {
return ptrsize
}
panic("Non-pointer void type is not supported")
case gi.TYPE_TAG_UTF8, gi.TYPE_TAG_FILENAME, gi.TYPE_TAG_GLIST,
gi.TYPE_TAG_GSLIST, gi.TYPE_TAG_GHASH:
return ptrsize
case gi.TYPE_TAG_ARRAY:
size := ti.ArrayFixedSize()
if size != -1 {
return size * TypeSize(ti.ParamType(0), flags)
}
return ptrsize
case gi.TYPE_TAG_INTERFACE:
if ti.IsPointer() {
flags |= TypePointer
}
return TypeSizeForInterface(ti.Interface(), flags)
default:
if ti.IsPointer() {
flags |= TypePointer
}
return TypeSizeForTag(tag, flags)
}
panic("unreachable: " + ti.Tag().String())
}
func TypeNeedsWrapper(ti *gi.TypeInfo) bool {
switch tag := ti.Tag(); tag {
case gi.TYPE_TAG_VOID:
if ti.IsPointer() {
return false
}
panic("Non-pointer void type is not supported")
case gi.TYPE_TAG_UTF8, gi.TYPE_TAG_FILENAME, gi.TYPE_TAG_GLIST,
gi.TYPE_TAG_GSLIST, gi.TYPE_TAG_GHASH:
return true
case gi.TYPE_TAG_ARRAY:
size := ti.ArrayFixedSize()
if size != -1 {
return TypeNeedsWrapper(ti.ParamType(0))
}
return true
case gi.TYPE_TAG_ERROR:
panic("not implemented")
case gi.TYPE_TAG_INTERFACE:
switch ti.Interface().Type() {
case gi.INFO_TYPE_CALLBACK, gi.INFO_TYPE_ENUM, gi.INFO_TYPE_FLAGS,
gi.INFO_TYPE_STRUCT, gi.INFO_TYPE_UNION:
return false
}
return true
}
return false
}
func SimpleCgoType(ti *gi.TypeInfo, flags TypeFlags) string {
tag := ti.Tag()
switch tag {
case gi.TYPE_TAG_VOID:
if ti.IsPointer() {
return "unsafe.Pointer"
}
panic("Non-pointer void type is not supported")
case gi.TYPE_TAG_INTERFACE:
bi := ti.Interface()
switch bi.Type() {
case gi.INFO_TYPE_ENUM, gi.INFO_TYPE_FLAGS:
ei := gi.ToEnumInfo(bi)
return GoTypeForTag(ei.StorageType(), flags|TypeExact)
case gi.INFO_TYPE_STRUCT:
ns := bi.Namespace()
nm := bi.Name()
fullnm := strings.ToLower(ns) + "." + nm
if _, ok := GConfig.Sys.DisguisedTypes[fullnm]; ok {
return "unsafe.Pointer"
}
}
}
if !strings.HasPrefix(CgoType(ti, flags), "*") {
return GoTypeForTag(tag, flags|TypeExact)
}
return "unsafe.Pointer"
}
func simple_cgo_type(ti *gi.TypeInfo, flags type_flags) string {
tag := ti.Tag()
switch tag {
case gi.TYPE_TAG_VOID:
if ti.IsPointer() {
return "unsafe.Pointer"
}
panic("Non-pointer void type is not supported")
case gi.TYPE_TAG_INTERFACE:
bi := ti.Interface()
switch bi.Type() {
case gi.INFO_TYPE_ENUM, gi.INFO_TYPE_FLAGS:
ei := gi.ToEnumInfo(bi)
return go_type_for_tag(ei.StorageType(), flags|type_exact)
case gi.INFO_TYPE_STRUCT:
ns := bi.Namespace()
nm := bi.Name()
fullnm := strings.ToLower(ns) + "." + nm
if config.is_disguised(fullnm) {
return "unsafe.Pointer"
}
}
}
if !strings.HasPrefix(cgo_type(ti, flags), "*") {
return go_type_for_tag(tag, flags|type_exact)
}
return "unsafe.Pointer"
}
func CgoType(ti *gi.TypeInfo, flags TypeFlags) string {
var out bytes.Buffer
switch tag := ti.Tag(); tag {
case gi.TYPE_TAG_VOID:
if ti.IsPointer() {
out.WriteString("unsafe.Pointer")
break
}
panic("Non-pointer void type is not supported in cgo")
case gi.TYPE_TAG_UTF8, gi.TYPE_TAG_FILENAME:
out.WriteString("*C.char")
case gi.TYPE_TAG_ARRAY:
switch ti.ArrayType() {
case gi.ARRAY_TYPE_C:
out.WriteString("*")
out.WriteString(CgoType(ti.ParamType(0), flags))
case gi.ARRAY_TYPE_ARRAY:
out.WriteString("*C.GArray")
case gi.ARRAY_TYPE_PTR_ARRAY:
out.WriteString("*C.GPtrArray")
case gi.ARRAY_TYPE_BYTE_ARRAY:
out.WriteString("*C.GByteArray")
}
case gi.TYPE_TAG_GLIST:
out.WriteString("*C.GList")
case gi.TYPE_TAG_GSLIST:
out.WriteString("*C.GSList")
case gi.TYPE_TAG_GHASH:
out.WriteString("*C.GHashTable")
case gi.TYPE_TAG_ERROR:
out.WriteString("*C.GError")
case gi.TYPE_TAG_INTERFACE:
if ti.IsPointer() {
flags |= TypePointer
}
out.WriteString(CgoTypeForInterface(ti.Interface(), flags))
default:
if ti.IsPointer() {
out.WriteString("*")
}
out.WriteString(CgoTypeForTag(tag, flags))
}
return out.String()
}
func CType(ti *gi.TypeInfo, flags TypeFlags) string {
var out bytes.Buffer
switch tag := ti.Tag(); tag {
case gi.TYPE_TAG_VOID:
if ti.IsPointer() {
out.WriteString("void*")
break
}
out.WriteString("void")
case gi.TYPE_TAG_UTF8, gi.TYPE_TAG_FILENAME:
out.WriteString("char*")
case gi.TYPE_TAG_ARRAY:
switch ti.ArrayType() {
case gi.ARRAY_TYPE_C:
out.WriteString(CType(ti.ParamType(0), flags))
out.WriteString("*")
case gi.ARRAY_TYPE_ARRAY:
out.WriteString("GArray*")
case gi.ARRAY_TYPE_PTR_ARRAY:
out.WriteString("GPtrArray*")
case gi.ARRAY_TYPE_BYTE_ARRAY:
out.WriteString("GByteArray*")
}
case gi.TYPE_TAG_GLIST:
out.WriteString("GList*")
case gi.TYPE_TAG_GSLIST:
out.WriteString("GSList*")
case gi.TYPE_TAG_GHASH:
out.WriteString("GHashTable*")
case gi.TYPE_TAG_ERROR:
out.WriteString("GError*")
case gi.TYPE_TAG_INTERFACE:
if ti.IsPointer() {
flags |= TypePointer
}
out.WriteString(CTypeForInterface(ti.Interface(), flags))
default:
out.WriteString(CTypeForTag(tag, flags))
if ti.IsPointer() {
out.WriteString("*")
}
}
return out.String()
}
func GoToCgo(ti *gi.TypeInfo, arg0, arg1 string, flags ConvFlags) string {
var out bytes.Buffer
printf := PrinterTo(&out)
switch tag := ti.Tag(); tag {
case gi.TYPE_TAG_VOID:
if ti.IsPointer() {
printf("%s = unsafe.Pointer(%s)", arg1, arg0)
break
}
printf("<ERROR: void>")
case gi.TYPE_TAG_UTF8, gi.TYPE_TAG_FILENAME:
printf("%s = _GoStringToGString(%s)", arg1, arg0)
if flags&ConvOwnEverything == 0 {
printf("\ndefer C.free(unsafe.Pointer(%s))", arg1)
}
case gi.TYPE_TAG_ARRAY:
switch ti.ArrayType() {
case gi.ARRAY_TYPE_C:
var nelem string
if ti.IsZeroTerminated() {
nelem = fmt.Sprintf("(len(%s) + 1)", arg0)
} else {
nelem = fmt.Sprintf("len(%s)", arg0)
}
// alloc memory
printf("%s = (%s)(C.malloc(C.size_t(int(unsafe.Sizeof(*%s)) * %s)))\n",
arg1, CgoType(ti, TypeNone), arg1, nelem)
printf("defer C.free(unsafe.Pointer(%s))\n", arg1)
// convert elements
printf("for i, e := range %s {\n", arg0)
array := CgoArrayToGoArray(ti.ParamType(0), arg1)
conv := GoToCgo(ti.ParamType(0), "e", array+"[i]", flags)
printf(PrintLinesWithIndent(conv))
printf("}")
// write a trailing zero if necessary (TODO: buggy)
if ti.IsZeroTerminated() {
printf("\n%s[len(%s)] = nil", array, arg0)
}
}
case gi.TYPE_TAG_GLIST:
case gi.TYPE_TAG_GSLIST:
case gi.TYPE_TAG_GHASH:
case gi.TYPE_TAG_ERROR:
case gi.TYPE_TAG_INTERFACE:
if ti.IsPointer() {
flags |= ConvPointer
}
printf(GoToCgoForInterface(ti.Interface(), arg0, arg1, flags))
default:
if ti.IsPointer() {
flags |= ConvPointer
}
printf(GoToCgoForTag(tag, arg0, arg1, flags))
}
return out.String()
}
func CgoToGo(ti *gi.TypeInfo, arg1, arg2 string, flags ConvFlags) string {
var out bytes.Buffer
printf := PrinterTo(&out)
switch tag := ti.Tag(); tag {
case gi.TYPE_TAG_VOID:
if ti.IsPointer() {
printf("%s = %s", arg2, arg1)
break
}
printf("<ERROR: void>")
case gi.TYPE_TAG_UTF8, gi.TYPE_TAG_FILENAME:
printf("%s = C.GoString(%s)", arg2, arg1)
if flags&ConvOwnEverything != 0 {
printf("\nC.g_free(unsafe.Pointer(%s))", arg1)
}
case gi.TYPE_TAG_ARRAY:
switch ti.ArrayType() {
case gi.ARRAY_TYPE_C:
// array was allocated already at this point
printf("for i := range %s {\n", arg2)
array := CgoArrayToGoArray(ti.ParamType(0), arg1)
conv := CgoToGo(ti.ParamType(0),
array+"[i]", arg2+"[i]", flags)
printf(PrintLinesWithIndent(conv))
printf("}")
}
case gi.TYPE_TAG_GLIST:
ptype := ti.ParamType(0)
printf("for iter := (*_GList)(unsafe.Pointer(%s)); iter != nil; iter = iter.next {\n", arg1)
elt := fmt.Sprintf("(%s)(iter.data)",
ForcePointer(CgoType(ptype, TypeReturn|TypeListMember)))
printf("\tvar elt %s\n", GoType(ptype, TypeReturn|TypeListMember))
conv := CgoToGo(ptype, elt, "elt", flags|ConvListMember)
printf(PrintLinesWithIndent(conv))
printf("\t%s = append(%s, elt)\n", arg2, arg2)
printf("}")
case gi.TYPE_TAG_GSLIST:
ptype := ti.ParamType(0)
printf("for iter := (*_GSList)(unsafe.Pointer(%s)); iter != nil; iter = iter.next {\n", arg1)
elt := fmt.Sprintf("(%s)(iter.data)",
ForcePointer(CgoType(ptype, TypeReturn|TypeListMember)))
printf("\tvar elt %s\n", GoType(ptype, TypeReturn|TypeListMember))
conv := CgoToGo(ptype, elt, "elt", flags|ConvListMember)
printf(PrintLinesWithIndent(conv))
printf("\t%s = append(%s, elt)\n", arg2, arg2)
printf("}")
case gi.TYPE_TAG_GHASH:
case gi.TYPE_TAG_ERROR:
printf("if %s != nil {\n", arg1)
printf("\t%s = errors.New(C.GoString(((*_GError)(unsafe.Pointer(%s))).message))\n", arg2, arg1)
printf("\tC.g_error_free(%s)\n", arg1)
printf("}\n")
case gi.TYPE_TAG_INTERFACE:
if ti.IsPointer() {
flags |= ConvPointer
}
printf(CgoToGoForInterface(ti.Interface(), arg1, arg2, flags))
default:
if ti.IsPointer() {
flags |= ConvPointer
}
printf(CgoToGoForTag(tag, arg1, arg2, flags))
}
return out.String()
}
func GoType(ti *gi.TypeInfo, flags TypeFlags) string {
var out bytes.Buffer
switch tag := ti.Tag(); tag {
case gi.TYPE_TAG_VOID:
if ti.IsPointer() {
out.WriteString("unsafe.Pointer")
break
}
panic("Non-pointer void type is not supported")
case gi.TYPE_TAG_UTF8, gi.TYPE_TAG_FILENAME:
if flags&TypeExact != 0 {
out.WriteString("unsafe.Pointer")
} else {
out.WriteString("string")
}
case gi.TYPE_TAG_ARRAY:
size := ti.ArrayFixedSize()
if size != -1 {
fmt.Fprintf(&out, "[%d]", size)
} else {
if flags&TypeExact != 0 {
out.WriteString("unsafe.Pointer")
} else {
out.WriteString("[]")
}
}
out.WriteString(GoType(ti.ParamType(0), flags))
case gi.TYPE_TAG_GLIST:
if flags&TypeExact != 0 {
out.WriteString("unsafe.Pointer")
} else {
out.WriteString("[]")
out.WriteString(GoType(ti.ParamType(0), flags|TypeListMember))
}
case gi.TYPE_TAG_GSLIST:
if flags&TypeExact != 0 {
out.WriteString("unsafe.Pointer")
} else {
out.WriteString("[]")
out.WriteString(GoType(ti.ParamType(0), flags|TypeListMember))
}
case gi.TYPE_TAG_GHASH:
if flags&TypeExact != 0 {
out.WriteString("unsafe.Pointer")
} else {
out.WriteString("map[")
out.WriteString(GoType(ti.ParamType(0), flags))
out.WriteString("]")
out.WriteString(GoType(ti.ParamType(1), flags))
}
case gi.TYPE_TAG_ERROR:
// not used?
out.WriteString("error")
case gi.TYPE_TAG_INTERFACE:
if ti.IsPointer() {
flags |= TypePointer
}
out.WriteString(GoTypeForInterface(ti.Interface(), flags))
default:
if ti.IsPointer() {
flags |= TypePointer
}
out.WriteString(GoTypeForTag(tag, flags))
}
return out.String()
}