1 /*
2 ** $Id: ltable.h $
3 ** Lua tables (hash)
4 ** See Copyright Notice in lua.h
5 */
6 
7 #ifndef ltable_h
8 #define ltable_h
9 
10 #include "lobject.h"
11 
12 
13 #define gnode(t,i)	(&(t)->node[i])
14 #define gval(n)		(&(n)->i_val)
15 #define gnext(n)	((n)->u.next)
16 
17 
18 /*
19 ** Clear all bits of fast-access metamethods, which means that the table
20 ** may have any of these metamethods. (First access that fails after the
21 ** clearing will set the bit again.)
22 */
23 #define invalidateTMcache(t)	((t)->flags &= ~maskflags)
24 
25 
26 /* true when 't' is using 'dummynode' as its hash part */
27 #define isdummy(t)		((t)->lastfree == NULL)
28 
29 
30 /* allocated size for hash nodes */
31 #define allocsizenode(t)	(isdummy(t) ? 0 : sizenode(t))
32 
33 
34 /* returns the Node, given the value of a table entry */
35 #define nodefromval(v)	cast(Node *, (v))
36 
37 
38 LUAI_FUNC const TValue *luaH_getint (Table *t, lua_Integer key);
39 LUAI_FUNC void luaH_setint (lua_State *L, Table *t, lua_Integer key,
40                                                     TValue *value);
41 LUAI_FUNC const TValue *luaH_getshortstr (Table *t, TString *key);
42 LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
43 LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
44 LUAI_FUNC void luaH_newkey (lua_State *L, Table *t, const TValue *key,
45                                                     TValue *value);
46 LUAI_FUNC void luaH_set (lua_State *L, Table *t, const TValue *key,
47                                                  TValue *value);
48 LUAI_FUNC void luaH_finishset (lua_State *L, Table *t, const TValue *key,
49                                        const TValue *slot, TValue *value);
50 LUAI_FUNC Table *luaH_new (lua_State *L);
51 LUAI_FUNC void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
52                                                     unsigned int nhsize);
53 LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize);
54 LUAI_FUNC void luaH_free (lua_State *L, Table *t);
55 LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);
56 LUAI_FUNC lua_Unsigned luaH_getn (Table *t);
57 LUAI_FUNC unsigned int luaH_realasize (const Table *t);
58 
59 
60 #if defined(LUA_DEBUG)
61 LUAI_FUNC Node *luaH_mainposition (const Table *t, const TValue *key);
62 LUAI_FUNC int luaH_isdummy (const Table *t);
63 #endif
64 
65 
66 #endif
67