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()
}