text: /*
  ** $Id: lua.h $
  ** Lua - A Scripting Language
  ** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
  ** See Copyright Notice at the end of this file
  */
  
  
  #ifndef lua_h
  #define lua_h
  
  #include <stdarg.h>
  #include <stddef.h>
  
  
  #include "luaconf.h"
  
  
  #define LUA_VERSION_MAJOR	"5"
  #define LUA_VERSION_MINOR	"4"
  #define LUA_VERSION_RELEASE	"0"
  
  #define LUA_VERSION_NUM			504
  #define LUA_VERSION_RELEASE_NUM		(LUA_VERSION_NUM * 100 + 0)
  
  #define LUA_VERSION	"Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
  #define LUA_RELEASE	LUA_VERSION "." LUA_VERSION_RELEASE
  #define LUA_COPYRIGHT	LUA_RELEASE "  Copyright (C) 1994-2018 Lua.org, PUC-Rio"
  #define LUA_AUTHORS	"R. Ierusalimschy, L. H. de Figueiredo, W. Celes"
  
  
  /* mark for precompiled code ('<esc>Lua') */
  #define LUA_SIGNATURE	"\x1bLua"
  
  /* option for multiple returns in 'lua_pcall' and 'lua_call' */
  #define LUA_MULTRET	(-1)
  
  
  /*
  ** Pseudo-indices
  ** (-LUAI_MAXSTACK is the minimum valid index; we keep some free empty
  ** space after that to help overflow detection)
  */
  #define LUA_REGISTRYINDEX	(-LUAI_MAXSTACK - 1000)
  #define lua_upvalueindex(i)	(LUA_REGISTRYINDEX - (i))
  
  
  /* thread status */
  #define LUA_OK		0
  #define LUA_YIELD	1
  #define LUA_ERRRUN	2
  #define LUA_ERRSYNTAX	3
  #define LUA_ERRMEM	4
  #define LUA_ERRERR	5
  
  
  typedef struct lua_State lua_State;
  
  
  /*
  ** basic types
  */
  #define LUA_TNONE		(-1)
  
  #define LUA_TNIL		0
  #define LUA_TBOOLEAN		1
  #define LUA_TLIGHTUSERDATA	2
  #define LUA_TNUMBER		3
  #define LUA_TSTRING		4
  #define LUA_TTABLE		5
  #define LUA_TFUNCTION		6
  #define LUA_TUSERDATA		7
  #define LUA_TTHREAD		8
  
  #define LUA_NUMTAGS		9
  
  
  
  /* minimum Lua stack available to a C function */
  #define LUA_MINSTACK	20
  
  
  /* predefined values in the registry */
  #define LUA_RIDX_MAINTHREAD	1
  #define LUA_RIDX_GLOBALS	2
  #define LUA_RIDX_LAST		LUA_RIDX_GLOBALS
  
  
  /* type of numbers in Lua */
  typedef LUA_NUMBER lua_Number;
  
  
  /* type for integer functions */
  typedef LUA_INTEGER lua_Integer;
  
  /* unsigned integer type */
  typedef LUA_UNSIGNED lua_Unsigned;
  
  /* type for continuation-function contexts */
  typedef LUA_KCONTEXT lua_KContext;
  
  
  /*
  ** Type for C functions registered with Lua
  */
  typedef int (*lua_CFunction) (lua_State *L);
  
  /*
  ** Type for continuation functions
  */
  typedef int (*lua_KFunction) (lua_State *L, int status, lua_KContext ctx);
  
  
  /*
  ** Type for functions that read/write blocks when loading/dumping Lua chunks
  */
  typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz);
  
  typedef int (*lua_Writer) (lua_State *L, const void *p, size_t sz, void *ud);
  
  
  /*
  ** Type for memory-allocation functions
  */
  typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
  
  
  /*
  ** Type for warning functions
  */
  typedef void (*lua_WarnFunction) (void **pud, const char *msg);
  
  
  
  
  /*
  ** generic extra include file
  */
  #if defined(LUA_USER_H)
  #include LUA_USER_H
  #endif
  
  
  /*
  ** RCS ident string
  */
  extern const char lua_ident[];
  
  
  /*
  ** state manipulation
  */
  LUA_API lua_State *(lua_newstate) (lua_Alloc f, void *ud);
  LUA_API void       (lua_close) (lua_State *L);
  LUA_API lua_State *(lua_newthread) (lua_State *L);
  LUA_API int        (lua_resetthread) (lua_State *L);
  
  LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf);
  
  
  LUA_API lua_Number (lua_version) (lua_State *L);
  
  
  /*
  ** basic stack manipulation
  */
  LUA_API int   (lua_absindex) (lua_State *L, int idx);
  LUA_API int   (lua_gettop) (lua_State *L);
  LUA_API void  (lua_settop) (lua_State *L, int idx);
  LUA_API void  (lua_pushvalue) (lua_State *L, int idx);
  LUA_API void  (lua_rotate) (lua_State *L, int idx, int n);
  LUA_API void  (lua_copy) (lua_State *L, int fromidx, int toidx);
  LUA_API int   (lua_checkstack) (lua_State *L, int n);
  
  LUA_API void  (lua_xmove) (lua_State *from, lua_State *to, int n);
  
  
  /*
  ** access functions (stack -> C)
  */
  
  LUA_API int             (lua_isnumber) (lua_State *L, int idx);
  LUA_API int             (lua_isstring) (lua_State *L, int idx);
  LUA_API int             (lua_iscfunction) (lua_State *L, int idx);
  LUA_API int             (lua_isinteger) (lua_State *L, int idx);
  LUA_API int             (lua_isuserdata) (lua_State *L, int idx);
  LUA_API int             (lua_type) (lua_State *L, int idx);
  LUA_API const char     *(lua_typename) (lua_State *L, int tp);
  
  LUA_API lua_Number      (lua_tonumberx) (lua_State *L, int idx, int *isnum);
  LUA_API lua_Integer     (lua_tointegerx) (lua_State *L, int idx, int *isnum);
  LUA_API int             (lua_toboolean) (lua_State *L, int idx);
  LUA_API const char     *(lua_tolstring) (lua_State *L, int idx, size_t *len);
  LUA_API lua_Unsigned    (lua_rawlen) (lua_State *L, int idx);
  LUA_API lua_CFunction   (lua_tocfunction) (lua_State *L, int idx);
  LUA_API void	       *(lua_touserdata) (lua_State *L, int idx);
  LUA_API lua_State      *(lua_tothread) (lua_State *L, int idx);
  LUA_API const void     *(lua_topointer) (lua_State *L, int idx);
  
  
  /*
  ** Comparison and arithmetic functions
  */
  
  #define LUA_OPADD	0	/* ORDER TM, ORDER OP */
  #define LUA_OPSUB	1
  #define LUA_OPMUL	2
  #define LUA_OPMOD	3
  #define LUA_OPPOW	4
  #define LUA_OPDIV	5
  #define LUA_OPIDIV	6
  #define LUA_OPBAND	7
  #define LUA_OPBOR	8
  #define LUA_OPBXOR	9
  #define LUA_OPSHL	10
  #define LUA_OPSHR	11
  #define LUA_OPUNM	12
  #define LUA_OPBNOT	13
  
  LUA_API void  (lua_arith) (lua_State *L, int op);
  
  #define LUA_OPEQ	0
  #define LUA_OPLT	1
  #define LUA_OPLE	2
  
  LUA_API int   (lua_rawequal) (lua_State *L, int idx1, int idx2);
  LUA_API int   (lua_compare) (lua_State *L, int idx1, int idx2, int op);
  
  
  /*
  ** push functions (C -> stack)
  */
  LUA_API void        (lua_pushnil) (lua_State *L);
  LUA_API void        (lua_pushnumber) (lua_State *L, lua_Number n);
  LUA_API void        (lua_pushinteger) (lua_State *L, lua_Integer n);
  LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t len);
  LUA_API const char *(lua_pushstring) (lua_State *L, const char *s);
  LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,
                                                        va_list argp);
  LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...);
  LUA_API void  (lua_pushcclosure) (lua_State *L, lua_CFunction fn, int n);
  LUA_API void  (lua_pushboolean) (lua_State *L, int b);
  LUA_API void  (lua_pushlightuserdata) (lua_State *L, void *p);
  LUA_API int   (lua_pushthread) (lua_State *L);
  
  
  /*
  ** get functions (Lua -> stack)
  */
  LUA_API int (lua_getglobal) (lua_State *L, const char *name);
  LUA_API int (lua_gettable) (lua_State *L, int idx);
  LUA_API int (lua_getfield) (lua_State *L, int idx, const char *k);
  LUA_API int (lua_geti) (lua_State *L, int idx, lua_Integer n);
  LUA_API int (lua_rawget) (lua_State *L, int idx);
  LUA_API int (lua_rawgeti) (lua_State *L, int idx, lua_Integer n);
  LUA_API int (lua_rawgetp) (lua_State *L, int idx, const void *p);
  
  LUA_API void  (lua_createtable) (lua_State *L, int narr, int nrec);
  LUA_API void *(lua_newuserdatauv) (lua_State *L, size_t sz, int nuvalue);
  LUA_API int   (lua_getmetatable) (lua_State *L, int objindex);
  LUA_API int  (lua_getiuservalue) (lua_State *L, int idx, int n);
  
  
  /*
  ** set functions (stack -> Lua)
  */
  LUA_API void  (lua_setglobal) (lua_State *L, const char *name);
  LUA_API void  (lua_settable) (lua_State *L, int idx);
  LUA_API void  (lua_setfield) (lua_State *L, int idx, const char *k);
  LUA_API void  (lua_seti) (lua_State *L, int idx, lua_Integer n);
  LUA_API void  (lua_rawset) (lua_State *L, int idx);
  LUA_API void  (lua_rawseti) (lua_State *L, int idx, lua_Integer n);
  LUA_API void  (lua_rawsetp) (lua_State *L, int idx, const void *p);
  LUA_API int   (lua_setmetatable) (lua_State *L, int objindex);
  LUA_API int   (lua_setiuservalue) (lua_State *L, int idx, int n);
  
  
  /*
  ** 'load' and 'call' functions (load and run Lua code)
  */
  LUA_API void  (lua_callk) (lua_State *L, int nargs, int nresults,
                             lua_KContext ctx, lua_KFunction k);
  #define lua_call(L,n,r)		lua_callk(L, (n), (r), 0, NULL)
  
  LUA_API int   (lua_pcallk) (lua_State *L, int nargs, int nresults, int errfunc,
                              lua_KContext ctx, lua_KFunction k);
  #define lua_pcall(L,n,r,f)	lua_pcallk(L, (n), (r), (f), 0, NULL)
  
  LUA_API int   (lua_load) (lua_State *L, lua_Reader reader, void *dt,
                            const char *chunkname, const char *mode);
  
  LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data, int strip);
  
  
  /*
  ** coroutine functions
  */
  LUA_API int  (lua_yieldk)     (lua_State *L, int nresults, lua_KContext ctx,
                                 lua_KFunction k);
  LUA_API int  (lua_resume)     (lua_State *L, lua_State *from, int narg,
                                 int *nres);
  LUA_API int  (lua_status)     (lua_State *L);
  LUA_API int (lua_isyieldable) (lua_State *L);
  
  #define lua_yield(L,n)		lua_yieldk(L, (n), 0, NULL)
  
  
  /*
  ** Warning-related functions
  */
  LUA_API void (lua_setwarnf) (lua_State *L, lua_WarnFunction f, void *ud);
  LUA_API void (lua_warning)  (lua_State *L, const char *msg);
  
  
  /*
  ** garbage-collection function and options
  */
  
  #define LUA_GCSTOP		0
  #define LUA_GCRESTART		1
  #define LUA_GCCOLLECT		2
  #define LUA_GCCOUNT		3
  #define LUA_GCCOUNTB		4
  #define LUA_GCSTEP		5
  #define LUA_GCSETPAUSE		6
  #define LUA_GCSETSTEPMUL	7
  #define LUA_GCISRUNNING		9
  #define LUA_GCGEN		10
  #define LUA_GCINC		11
  
  LUA_API int (lua_gc) (lua_State *L, int what, ...);
  
  
  /*
  ** miscellaneous functions
  */
  
  LUA_API int   (lua_error) (lua_State *L);
  
  LUA_API int   (lua_next) (lua_State *L, int idx);
  
  LUA_API void  (lua_concat) (lua_State *L, int n);
  LUA_API void  (lua_len)    (lua_State *L, int idx);
  
  LUA_API size_t   (lua_stringtonumber) (lua_State *L, const char *s);
  
  LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
  LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
  
  LUA_API void  (lua_toclose) (lua_State *L, int idx);
  
  
  /*
  ** {==============================================================
  ** some useful macros
  ** ===============================================================
  */
  
  #define lua_getextraspace(L)	((void *)((char *)(L) - LUA_EXTRASPACE))
  
  #define lua_tonumber(L,i)	lua_tonumberx(L,(i),NULL)
  #define lua_tointeger(L,i)	lua_tointegerx(L,(i),NULL)
  
  #define lua_pop(L,n)		lua_settop(L, -(n)-1)
  
  #define lua_newtable(L)		lua_createtable(L, 0, 0)
  
  #define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n)))
  
  #define lua_pushcfunction(L,f)	lua_pushcclosure(L, (f), 0)
  
  #define lua_isfunction(L,n)	(lua_type(L, (n)) == LUA_TFUNCTION)
  #define lua_istable(L,n)	(lua_type(L, (n)) == LUA_TTABLE)
  #define lua_islightuserdata(L,n)	(lua_type(L, (n)) == LUA_TLIGHTUSERDATA)
  #define lua_isnil(L,n)		(lua_type(L, (n)) == LUA_TNIL)
  #define lua_isboolean(L,n)	(lua_type(L, (n)) == LUA_TBOOLEAN)
  #define lua_isthread(L,n)	(lua_type(L, (n)) == LUA_TTHREAD)
  #define lua_isnone(L,n)		(lua_type(L, (n)) == LUA_TNONE)
  #define lua_isnoneornil(L, n)	(lua_type(L, (n)) <= 0)
  
  #define lua_pushliteral(L, s)	lua_pushstring(L, "" s)
  
  #define lua_pushglobaltable(L)  \
  	((void)lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS))
  
  #define lua_tostring(L,i)	lua_tolstring(L, (i), NULL)
  
  
  #define lua_insert(L,idx)	lua_rotate(L, (idx), 1)
  
  #define lua_remove(L,idx)	(lua_rotate(L, (idx), -1), lua_pop(L, 1))
  
  #define lua_replace(L,idx)	(lua_copy(L, -1, (idx)), lua_pop(L, 1))
  
  /* }============================================================== */
  
  
  /*
  ** {==============================================================
  ** compatibility macros
  ** ===============================================================
  */
  #if defined(LUA_COMPAT_APIINTCASTS)
  
  #define lua_pushunsigned(L,n)	lua_pushinteger(L, (lua_Integer)(n))
  #define lua_tounsignedx(L,i,is)	((lua_Unsigned)lua_tointegerx(L,i,is))
  #define lua_tounsigned(L,i)	lua_tounsignedx(L,(i),NULL)
  
  #endif
  
  #define lua_newuserdata(L,s)	lua_newuserdatauv(L,s,1)
  #define lua_getuservalue(L,idx)	lua_getiuservalue(L,idx,1)
  #define lua_setuservalue(L,idx)	lua_setiuservalue(L,idx,1)
  
  /* }============================================================== */
  
  /*
  ** {======================================================================
  ** Debug API
  ** =======================================================================
  */
  
  
  /*
  ** Event codes
  */
  #define LUA_HOOKCALL	0
  #define LUA_HOOKRET	1
  #define LUA_HOOKLINE	2
  #define LUA_HOOKCOUNT	3
  #define LUA_HOOKTAILCALL 4
  
  
  /*
  ** Event masks
  */
  #define LUA_MASKCALL	(1 << LUA_HOOKCALL)
  #define LUA_MASKRET	(1 << LUA_HOOKRET)
  #define LUA_MASKLINE	(1 << LUA_HOOKLINE)
  #define LUA_MASKCOUNT	(1 << LUA_HOOKCOUNT)
  
  typedef struct lua_Debug lua_Debug;  /* activation record */
  
  
  /* Functions to be called by the debugger in specific events */
  typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar);
  
  
  LUA_API int (lua_getstack) (lua_State *L, int level, lua_Debug *ar);
  LUA_API int (lua_getinfo) (lua_State *L, const char *what, lua_Debug *ar);
  LUA_API const char *(lua_getlocal) (lua_State *L, const lua_Debug *ar, int n);
  LUA_API const char *(lua_setlocal) (lua_State *L, const lua_Debug *ar, int n);
  LUA_API const char *(lua_getupvalue) (lua_State *L, int funcindex, int n);
  LUA_API const char *(lua_setupvalue) (lua_State *L, int funcindex, int n);
  
  LUA_API void *(lua_upvalueid) (lua_State *L, int fidx, int n);
  LUA_API void  (lua_upvaluejoin) (lua_State *L, int fidx1, int n1,
                                                 int fidx2, int n2);
  
  LUA_API void (lua_sethook) (lua_State *L, lua_Hook func, int mask, int count);
  LUA_API lua_Hook (lua_gethook) (lua_State *L);
  LUA_API int (lua_gethookmask) (lua_State *L);
  LUA_API int (lua_gethookcount) (lua_State *L);
  
  
  struct lua_Debug {
    int event;
    const char *name;	/* (n) */
    const char *namewhat;	/* (n) 'global', 'local', 'field', 'method' */
    const char *what;	/* (S) 'Lua', 'C', 'main', 'tail' */
    const char *source;	/* (S) */
    int currentline;	/* (l) */
    int linedefined;	/* (S) */
    int lastlinedefined;	/* (S) */
    unsigned char nups;	/* (u) number of upvalues */
    unsigned char nparams;/* (u) number of parameters */
    char isvararg;        /* (u) */
    char istailcall;	/* (t) */
    unsigned short ftransfer;   /* (r) index of first value transferred */
    unsigned short ntransfer;   /* (r) number of transferred values */
    char short_src[LUA_IDSIZE]; /* (S) */
    /* private part */
    struct CallInfo *i_ci;  /* active function */
  };
  
  /* }====================================================================== */
  
  
  /******************************************************************************
  * Copyright (C) 1994-2018 Lua.org, PUC-Rio.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
  * without limitation the rights to use, copy, modify, merge, publish,
  * distribute, sublicense, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
  *
  * The above copyright notice and this permission notice shall be
  * included in all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  ******************************************************************************/
  
  
  #endif
  