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 67