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-rw-r--r--src/universe.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/src/universe.c b/src/universe.c
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1/*
2 * UNIVERSE.C Copyright (c) 2017, Benoit Germain
3 */
4
5/*
6===============================================================================
7
8Copyright (C) 2017 Benoit Germain <bnt.germain@gmail.com>
9
10Permission is hereby granted, free of charge, to any person obtaining a copy
11of this software and associated documentation files (the "Software"), to deal
12in the Software without restriction, including without limitation the rights
13to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14copies of the Software, and to permit persons to whom the Software is
15furnished to do so, subject to the following conditions:
16
17The above copyright notice and this permission notice shall be included in
18all copies or substantial portions of the Software.
19
20THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26THE SOFTWARE.
27
28===============================================================================
29*/
30
31#include "compat.h"
32#include "macros_and_utils.h"
33#include "universe.h"
34
35// crc64/we of string "UNIVERSE_REGKEY" generated at https://www.nitrxgen.net/hashgen/
36static void* const UNIVERSE_REGKEY = ((void*)0x9f877b2cf078f17f);
37
38// ################################################################################################
39
40struct s_Universe* universe_create( lua_State* L)
41{
42 struct s_Universe* U = (struct s_Universe*) lua_newuserdata( L, sizeof(struct s_Universe)); // universe
43 memset( U, 0, sizeof( struct s_Universe));
44 lua_pushlightuserdata( L, UNIVERSE_REGKEY); // universe UNIVERSE_REGKEY
45 lua_pushvalue( L, -2); // universe UNIVERSE_REGKEY universe
46 lua_rawset( L, LUA_REGISTRYINDEX); // universe
47 return U;
48}
49
50// ################################################################################################
51
52void universe_store( lua_State* L, struct s_Universe* U)
53{
54 STACK_CHECK( L);
55 lua_pushlightuserdata( L, UNIVERSE_REGKEY);
56 lua_pushlightuserdata( L, U);
57 lua_rawset( L, LUA_REGISTRYINDEX);
58 STACK_END( L, 0);
59}
60
61// ################################################################################################
62
63struct s_Universe* universe_get( lua_State* L)
64{
65 struct s_Universe* universe;
66 STACK_GROW( L, 2);
67 STACK_CHECK( L);
68 lua_pushlightuserdata( L, UNIVERSE_REGKEY);
69 lua_rawget( L, LUA_REGISTRYINDEX);
70 universe = lua_touserdata( L, -1); // NULL if nil
71 lua_pop( L, 1);
72 STACK_END( L, 0);
73 return universe;
74}