static void
pack_one(lua_State *L, struct write_block *b, int index, int depth) {
if (depth > MAX_DEPTH) {
wb_free(b);
luaL_error(L, "serialize can't pack too depth table");
}
int type = lua_type(L,index);
switch(type) {
case LUA_TNIL:
wb_nil(b);
break;
case LUA_TNUMBER: {
if (lua_isinteger(L, index)) {
lua_Integer x = lua_tointeger(L,index);
wb_integer(b, x);
} else {
lua_Number n = lua_tonumber(L,index);
wb_real(b,n);
}
break;
}
case LUA_TBOOLEAN:
wb_boolean(b, lua_toboolean(L,index));
break;
case LUA_TSTRING: {
size_t sz = 0;
const char *str = lua_tolstring(L,index,&sz);
wb_string(b, str, (int)sz);
break;
}
case LUA_TLIGHTUSERDATA:
wb_pointer(b, lua_touserdata(L,index));
break;
case LUA_TTABLE: {
if (index < 0) {
index = lua_gettop(L) + index + 1;
}
wb_table(L, b, index, depth+1);
break;
}
default:
wb_free(b);
luaL_error(L, "Unsupport type %s to serialize", lua_typename(L, type));
}
}
static void
wb_table_hash(lua_State *L, struct write_block * wb, int index, int depth, int array_size) {
lua_pushnil(L);
while (lua_next(L, index) != 0) {
if (lua_type(L, -2) == LUA_TNUMBER) {
lua_Number k = lua_tonumber(L, -2);
int32_t x = (int32_t)lua_tointeger(L, -2);
if (k == (lua_Number)x && x > 0 && x <= array_size) {
lua_pop(L, 1);
continue;
}
}
_pack_one(L, wb, -2, depth);
_pack_one(L, wb, -1, depth);
lua_pop(L, 1);
}
wb_nil(wb);
}
static void
wb_table_hash(lua_State *L, struct write_block * wb, int index, int depth, int array_size) {
lua_pushnil(L);
while (lua_next(L, index) != 0) {
if (lua_type(L,-2) == LUA_TNUMBER) {
if (lua_isinteger(L, -2)) {
lua_Integer x = lua_tointeger(L,-2);
if (x>0 && x<=array_size) {
lua_pop(L,1);
continue;
}
}
}
pack_one(L,wb,-2,depth);
pack_one(L,wb,-1,depth);
lua_pop(L, 1);
}
wb_nil(wb);
}
static void
wb_table_metapairs(lua_State *L, struct write_block *wb, int index, int depth) {
uint8_t n = COMBINE_TYPE(TYPE_TABLE, 0);
wb_push(wb, &n, 1);
lua_pushvalue(L, index);
lua_call(L, 1, 3);
for(;;) {
lua_pushvalue(L, -2);
lua_pushvalue(L, -2);
lua_copy(L, -5, -3);
lua_call(L, 2, 2);
int type = lua_type(L, -2);
if (type == LUA_TNIL) {
lua_pop(L, 4);
break;
}
pack_one(L, wb, -2, depth);
pack_one(L, wb, -1, depth);
lua_pop(L, 1);
}
wb_nil(wb);
}
