mudgangster

Tiny, scriptable MUD client
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ltable.h (2094B)

      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 
     43 LUAI_FUNC const TValue *luaH_getint (Table *t, lua_Integer key);
     44 LUAI_FUNC void luaH_setint (lua_State *L, Table *t, lua_Integer key,
     45                                                     TValue *value);
     46 LUAI_FUNC const TValue *luaH_getshortstr (Table *t, TString *key);
     47 LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
     48 LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
     49 LUAI_FUNC TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key);
     50 LUAI_FUNC TValue *luaH_set (lua_State *L, Table *t, const TValue *key);
     51 LUAI_FUNC Table *luaH_new (lua_State *L);
     52 LUAI_FUNC void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
     53                                                     unsigned int nhsize);
     54 LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize);
     55 LUAI_FUNC void luaH_free (lua_State *L, Table *t);
     56 LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);
     57 LUAI_FUNC lua_Unsigned luaH_getn (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