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  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.