/*
* call-seq:
* MessageClass.decode_json(data) => message
*
* Decodes the given data (as a string containing bytes in protocol buffers wire
* format) under the interpretration given by this message class's definition
* and returns a message object with the corresponding field values.
*/
VALUE Message_decode_json(VALUE klass, VALUE data) {
VALUE descriptor = rb_ivar_get(klass, descriptor_instancevar_interned);
Descriptor* desc = ruby_to_Descriptor(descriptor);
VALUE msgklass = Descriptor_msgclass(descriptor);
VALUE msg_rb;
MessageHeader* msg;
if (TYPE(data) != T_STRING) {
rb_raise(rb_eArgError, "Expected string for JSON data.");
}
// TODO(cfallin): Check and respect string encoding. If not UTF-8, we need to
// convert, because string handlers pass data directly to message string
// fields.
msg_rb = rb_class_new_instance(0, NULL, msgklass);
TypedData_Get_Struct(msg_rb, MessageHeader, &Message_type, msg);
{
stackenv se;
upb_sink sink;
upb_json_parser* parser;
stackenv_init(&se, "Error occurred during parsing: %s");
upb_sink_reset(&sink, get_fill_handlers(desc), msg);
parser = upb_json_parser_create(&se.env, &sink);
upb_bufsrc_putbuf(RSTRING_PTR(data), RSTRING_LEN(data),
upb_json_parser_input(parser));
stackenv_uninit(&se);
}
return msg_rb;
}
static void check_repeated_field_type(VALUE val, const upb_fielddef* field) {
RepeatedField* self;
assert(upb_fielddef_label(field) == UPB_LABEL_REPEATED);
if (!RB_TYPE_P(val, T_DATA) || !RTYPEDDATA_P(val) ||
RTYPEDDATA_TYPE(val) != &RepeatedField_type) {
rb_raise(cTypeError, "Expected repeated field array");
}
self = ruby_to_RepeatedField(val);
if (self->field_type != upb_fielddef_type(field)) {
rb_raise(cTypeError, "Repeated field array has wrong element type");
}
if (self->field_type == UPB_TYPE_MESSAGE) {
if (self->field_type_class !=
Descriptor_msgclass(get_def_obj(upb_fielddef_subdef(field)))) {
rb_raise(cTypeError,
"Repeated field array has wrong message class");
}
}
if (self->field_type == UPB_TYPE_ENUM) {
if (self->field_type_class !=
EnumDescriptor_enummodule(get_def_obj(upb_fielddef_subdef(field)))) {
rb_raise(cTypeError,
"Repeated field array has wrong enum class");
}
}
}
/*
* call-seq:
* MessageClass.decode(data) => message
*
* Decodes the given data (as a string containing bytes in protocol buffers wire
* format) under the interpretration given by this message class's definition
* and returns a message object with the corresponding field values.
*/
VALUE Message_decode(VALUE klass, VALUE data) {
VALUE descriptor = rb_ivar_get(klass, descriptor_instancevar_interned);
Descriptor* desc = ruby_to_Descriptor(descriptor);
VALUE msgklass = Descriptor_msgclass(descriptor);
VALUE msg_rb;
MessageHeader* msg;
if (TYPE(data) != T_STRING) {
rb_raise(rb_eArgError, "Expected string for binary protobuf data.");
}
msg_rb = rb_class_new_instance(0, NULL, msgklass);
TypedData_Get_Struct(msg_rb, MessageHeader, &Message_type, msg);
{
const upb_pbdecodermethod* method = msgdef_decodermethod(desc);
const upb_handlers* h = upb_pbdecodermethod_desthandlers(method);
stackenv se;
upb_sink sink;
upb_pbdecoder* decoder;
stackenv_init(&se, "Error occurred during parsing: %s");
upb_sink_reset(&sink, h, msg);
decoder = upb_pbdecoder_create(&se.env, method, &sink);
upb_bufsrc_putbuf(RSTRING_PTR(data), RSTRING_LEN(data),
upb_pbdecoder_input(decoder));
stackenv_uninit(&se);
}
return msg_rb;
}
// Handler for a submessage field in a oneof.
static void *oneofsubmsg_handler(void *closure,
const void *hd) {
MessageHeader* msg = closure;
const oneof_handlerdata_t *oneofdata = hd;
uint32_t oldcase = DEREF(msg, oneofdata->case_ofs, uint32_t);
VALUE subdesc =
get_def_obj((void*)oneofdata->md);
VALUE subklass = Descriptor_msgclass(subdesc);
VALUE submsg_rb;
MessageHeader* submsg;
if (oldcase != oneofdata->oneof_case_num ||
DEREF(msg, oneofdata->ofs, VALUE) == Qnil) {
DEREF(msg, oneofdata->ofs, VALUE) =
rb_class_new_instance(0, NULL, subklass);
}
// Set the oneof case *after* allocating the new class instance -- otherwise,
// if the Ruby GC is invoked as part of a call into the VM, it might invoke
// our mark routines, and our mark routines might see the case value
// indicating a VALUE is present and expect a valid VALUE. See comment in
// layout_set() for more detail: basically, the change to the value and the
// case must be atomic w.r.t. the Ruby VM.
DEREF(msg, oneofdata->case_ofs, uint32_t) =
oneofdata->oneof_case_num;
submsg_rb = DEREF(msg, oneofdata->ofs, VALUE);
TypedData_Get_Struct(submsg_rb, MessageHeader, &Message_type, submsg);
return submsg;
}
VALUE field_type_class(const upb_fielddef* field) {
VALUE type_class = Qnil;
if (upb_fielddef_type(field) == UPB_TYPE_MESSAGE) {
VALUE submsgdesc =
get_def_obj(upb_fielddef_subdef(field));
type_class = Descriptor_msgclass(submsgdesc);
} else if (upb_fielddef_type(field) == UPB_TYPE_ENUM) {
VALUE subenumdesc =
get_def_obj(upb_fielddef_subdef(field));
type_class = EnumDescriptor_enummodule(subenumdesc);
}
return type_class;
}
// Appends a submessage to a repeated field (a regular Ruby array for now).
static void *appendsubmsg_handler(void *closure, const void *hd) {
VALUE ary = (VALUE)closure;
const submsg_handlerdata_t *submsgdata = hd;
VALUE subdesc =
get_def_obj((void*)submsgdata->md);
VALUE subklass = Descriptor_msgclass(subdesc);
MessageHeader* submsg;
VALUE submsg_rb = rb_class_new_instance(0, NULL, subklass);
RepeatedField_push(ary, submsg_rb);
TypedData_Get_Struct(submsg_rb, MessageHeader, &Message_type, submsg);
return submsg;
}
// Sets a non-repeated submessage field in a message.
static void *submsg_handler(void *closure, const void *hd) {
MessageHeader* msg = closure;
const submsg_handlerdata_t* submsgdata = hd;
VALUE subdesc =
get_def_obj((void*)submsgdata->md);
VALUE subklass = Descriptor_msgclass(subdesc);
if (DEREF(msg, submsgdata->ofs, VALUE) == Qnil) {
DEREF(msg, submsgdata->ofs, VALUE) =
rb_class_new_instance(0, NULL, subklass);
}
VALUE submsg_rb = DEREF(msg, submsgdata->ofs, VALUE);
MessageHeader* submsg;
TypedData_Get_Struct(submsg_rb, MessageHeader, &Message_type, submsg);
return submsg;
}