bool upb_fielddef_resolvedefault(upb_fielddef *f) {
if (!upb_fielddef_default_is_symbolic(f)) return true;
upb_byteregion *bytes = upb_value_getbyteregion(f->defaultval);
const upb_enumdef *e = upb_downcast_enumdef(upb_fielddef_subdef(f));
assert(bytes); // Points to either a real default or the empty string.
assert(e);
if (upb_byteregion_len(bytes) == 0) {
// The "default default" for an enum is the first defined value.
upb_value_setint32(&f->defaultval, e->defaultval);
} else {
size_t len;
int32_t val = 0;
// ptr is guaranteed to be NULL-terminated because the byteregion was
// created with upb_byteregion_newl().
const char *ptr = upb_byteregion_getptr(
bytes, upb_byteregion_startofs(bytes), &len);
assert(len == upb_byteregion_len(bytes)); // Should all be in one chunk
if (!upb_enumdef_ntoi(e, ptr, &val)) {
return false;
}
upb_value_setint32(&f->defaultval, val);
}
f->default_is_string = false;
upb_byteregion_free(bytes);
return true;
}
void upb_decoder_resetinput(upb_decoder *d, upb_byteregion *input,
void *closure) {
assert(d->plan);
assert(upb_byteregion_discardofs(input) == upb_byteregion_startofs(input));
upb_dispatcher_frame *f =
upb_dispatcher_reset(&d->dispatcher, closure, d->plan->handlers->msgs[0]);
upb_status_clear(&d->status);
f->end_ofs = UPB_NONDELIMITED;
d->input = input;
d->str_byteregion.bytesrc = input->bytesrc;
// Protect against assert in skiptonewbuf().
d->bufstart_ofs = 0;
d->ptr = NULL;
d->buf = NULL;
upb_decoder_skiptonewbuf(d, upb_byteregion_startofs(input));
}