1/*
2** $Id: ltable.h,v 2.23.1.2 2018/05/24 19:39:05 roberto Exp $
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)->i_key.nk.next)
16
17
18/* 'const' to avoid wrong writings that can mess up field 'next' */
19#define gkey(n) cast(const TValue*, (&(n)->i_key.tvk))
20
21/*
22** writable version of 'gkey'; allows updates to individual fields,
23** but not to the whole (which has incompatible type)
24*/
25#define wgkey(n) (&(n)->i_key.nk)
26
27#define invalidateTMcache(t) ((t)->flags = 0)
28
29
30/* true when 't' is using 'dummynode' as its hash part */
31#define isdummy(t) ((t)->lastfree == NULL)
32
33
34/* allocated size for hash nodes */
35#define allocsizenode(t) (isdummy(t) ? 0 : sizenode(t))
36
37
38/* returns the key, given the value of a table entry */
39#define keyfromval(v) \
40 (gkey(cast(Node *, cast(char *, (v)) - offsetof(Node, i_val))))
41
42
43LUAI_FUNC const TValue *luaH_getint (Table *t, lua_Integer key);
44LUAI_FUNC void luaH_setint (lua_State *L, Table *t, lua_Integer key,
45 TValue *value);
46LUAI_FUNC const TValue *luaH_getshortstr (Table *t, TString *key);
47LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
48LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
49LUAI_FUNC TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key);
50LUAI_FUNC TValue *luaH_set (lua_State *L, Table *t, const TValue *key);
51LUAI_FUNC Table *luaH_new (lua_State *L);
52LUAI_FUNC void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
53 unsigned int nhsize);
54LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize);
55LUAI_FUNC void luaH_free (lua_State *L, Table *t);
56LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);
57LUAI_FUNC lua_Unsigned luaH_getn (Table *t);
58
59
60#if defined(LUA_DEBUG)
61LUAI_FUNC Node *luaH_mainposition (const Table *t, const TValue *key);
62LUAI_FUNC int luaH_isdummy (const Table *t);
63#endif
64
65
66#endif
67