/**
* lupb_msg_index
*
* Handles:
* msg.foo
* msg["foo"]
* msg[field_descriptor] # (for extensions) (TODO)
*/
static int lupb_msg_index(lua_State *L) {
lupb_msg *lmsg = lupb_msg_check(L, 1);
const upb_fielddef *f = lupb_msg_checkfield(L, lmsg, 2);
const upb_msglayout *l = lmsg->lmsgclass->layout;
if (in_userval(f)) {
lupb_uservalgeti(L, 1, lupb_fieldindex(f));
if (lua_isnil(L, -1)) {
/* Check if we need to lazily create wrapper. */
if (upb_fielddef_isseq(f)) {
/* TODO(haberman) */
} else if (upb_fielddef_issubmsg(f)) {
/* TODO(haberman) */
} else {
UPB_ASSERT(upb_fielddef_isstring(f));
if (upb_msg_has(lmsg->msg, f, l)) {
upb_msgval val = upb_msg_get(lmsg->msg, f, l);
lua_pop(L, 1);
lua_pushlstring(L, val.str.ptr, val.str.len);
lupb_uservalseti(L, 1, lupb_fieldindex(f), -1);
}
}
}
} else {
lupb_pushmsgval(L, upb_fielddef_type(f), upb_msg_get(lmsg->msg, f, l));
}
return 1;
}
static upb_flow_t upb_msg_dispatch(upb_msg *msg, upb_msgdef *md,
upb_dispatcher *d) {
upb_msg_iter i;
for(i = upb_msg_begin(md); !upb_msg_done(i); i = upb_msg_next(md, i)) {
upb_fielddef *f = upb_msg_iter_field(i);
if (!upb_msg_has(msg, f)) continue;
upb_fhandlers *hf = upb_dispatcher_lookup(d, f->number);
if (!hf) continue;
upb_value val = upb_msg_get(msg, f);
if (upb_isarray(f)) {
upb_array *arr = upb_value_getarr(val);
for (uint32_t j = 0; j < upb_array_len(arr); ++j) {
upb_msg_pushval(upb_array_get(arr, f, j), f, d, hf);
}
} else {
upb_msg_pushval(val, f, d, hf);
}
}
return UPB_CONTINUE;
}