/*
** $Id: ltable.h,v 2.21 2015/11/03 15:47:30 roberto Exp $
** Lua tables (hash)
** See Copyright Notice in lua.h
*/

#ifndef ltable_h
#define ltable_h

#include "lobject.h"

#define gnode(t, i) (&(t)->node[i])
#define gval(n) (&(n)->i_val)
#define gnext(n) ((n)->i_key.nk.next)

/* 'const' to avoid wrong writings that can mess up field 'next' */
#define gkey(n) cast(const TValue*, (&(n)->i_key.tvk))

/*
** writable version of 'gkey'; allows updates to individual fields,
** but not to the whole (which has incompatible type)
*/
#define wgkey(n) (&(n)->i_key.nk)

#define invalidateTMcache(t) ((t)->flags = 0)

/* returns the key, given the value of a table entry */
#define keyfromval(v) (gkey(cast(Node*, cast(char*, (v)) - offsetof(Node, i_val))))

LUAI_FUNC const TValue* luaH_getint(Table* t, lua_Integer key);
LUAI_FUNC void luaH_setint(lua_State* L, Table* t, lua_Integer key, TValue* value);
LUAI_FUNC const TValue* luaH_getshortstr(Table* t, TString* key);
LUAI_FUNC const TValue* luaH_getstr(Table* t, TString* key);
LUAI_FUNC const TValue* luaH_get(Table* t, const TValue* key);
LUAI_FUNC TValue* luaH_newkey(lua_State* L, Table* t, const TValue* key);
LUAI_FUNC TValue* luaH_set(lua_State* L, Table* t, const TValue* key);
LUAI_FUNC Table* luaH_new(lua_State* L);
LUAI_FUNC void luaH_resize(lua_State* L, Table* t, unsigned int nasize, unsigned int nhsize);
LUAI_FUNC void luaH_resizearray(lua_State* L, Table* t, unsigned int nasize);
LUAI_FUNC void luaH_free(lua_State* L, Table* t);
LUAI_FUNC int luaH_next(lua_State* L, Table* t, StkId key);
LUAI_FUNC int luaH_getn(Table* t);

#if defined(LUA_DEBUG)
LUAI_FUNC Node* luaH_mainposition(const Table* t, const TValue* key);
LUAI_FUNC int luaH_isdummy(Node* n);
#endif

#endif
