text: /*
  ** $Id: lbaselib.c,v 1.191.1.6 2008/02/14 16:46:22 roberto Exp $
  ** Basic library
  ** See Copyright Notice in lua.h
  */
  
  
  
  #include "c_ctype.h"
  #include "c_stdio.h"
  #include "c_stdlib.h"
  #include "c_string.h"
  
  #define lbaselib_c
  #define LUA_LIB
  
  #include "lua.h"
  
  #include "lauxlib.h"
  #include "lualib.h"
  #include "lrotable.h"
  
  
  
  
  /*
  ** If your system does not support `stdout', you can just remove this function.
  ** If you need, you can define your own `print' function, following this
  ** model but changing `fputs' to put the strings at a proper place
  ** (a console window or a log file, for instance).
  */
  static int luaB_print (lua_State *L) {
    int n = lua_gettop(L);  /* number of arguments */
    int i;
    lua_getglobal(L, "tostring");
    for (i=1; i<=n; i++) {
      const char *s;
      lua_pushvalue(L, -1);  /* function to be called */
      lua_pushvalue(L, i);   /* value to print */
      lua_call(L, 1, 1);
      s = lua_tostring(L, -1);  /* get result */
      if (s == NULL)
        return luaL_error(L, LUA_QL("tostring") " must return a string to "
                             LUA_QL("print"));
  #if defined(LUA_USE_STDIO)
      if (i>1) c_fputs("\t", c_stdout);
      c_fputs(s, c_stdout);
  #else
      if (i>1)  luai_writestring("\t", 1);
      luai_writestring(s, c_strlen(s));
  #endif
      lua_pop(L, 1);  /* pop result */
    }
  #if defined(LUA_USE_STDIO)
    c_fputs("\n", c_stdout);
  #else
    luai_writeline();
  #endif
    return 0;
  }
  
  
  static int luaB_tonumber (lua_State *L) {
    int base = luaL_optint(L, 2, 10);
    if (base == 10) {  /* standard conversion */
      luaL_checkany(L, 1);
      if (lua_isnumber(L, 1)) {
        lua_pushnumber(L, lua_tonumber(L, 1));
        return 1;
      }
    }
    else {
      const char *s1 = luaL_checkstring(L, 1);
      char *s2;
      unsigned long n;
      luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
      n = c_strtoul(s1, &s2, base);
      if (s1 != s2) {  /* at least one valid digit? */
        while (isspace((unsigned char)(*s2))) s2++;  /* skip trailing spaces */
        if (*s2 == '\0') {  /* no invalid trailing characters? */
          lua_pushnumber(L, (lua_Number)n);
          return 1;
        }
      }
    }
    lua_pushnil(L);  /* else not a number */
    return 1;
  }
  
  
  static int luaB_error (lua_State *L) {
    int level = luaL_optint(L, 2, 1);
    lua_settop(L, 1);
    if (lua_isstring(L, 1) && level > 0) {  /* add extra information? */
      luaL_where(L, level);
      lua_pushvalue(L, 1);
      lua_concat(L, 2);
    }
    return lua_error(L);
  }
  
  
  static int luaB_getmetatable (lua_State *L) {
    luaL_checkany(L, 1);
    if (!lua_getmetatable(L, 1)) {
      lua_pushnil(L);
      return 1;  /* no metatable */
    }
    luaL_getmetafield(L, 1, "__metatable");
    return 1;  /* returns either __metatable field (if present) or metatable */
  }
  
  
  static int luaB_setmetatable (lua_State *L) {
    int t = lua_type(L, 2);
    luaL_checktype(L, 1, LUA_TTABLE);
    luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE || t == LUA_TROTABLE, 2,
                      "nil or table expected");
    if (luaL_getmetafield(L, 1, "__metatable"))
      luaL_error(L, "cannot change a protected metatable");
    lua_settop(L, 2);
    lua_setmetatable(L, 1);
    return 1;
  }
  
  
  static void getfunc (lua_State *L, int opt) {
    if (lua_isfunction(L, 1)) lua_pushvalue(L, 1);
    else {
      lua_Debug ar;
      int level = opt ? luaL_optint(L, 1, 1) : luaL_checkint(L, 1);
      luaL_argcheck(L, level >= 0, 1, "level must be non-negative");
      if (lua_getstack(L, level, &ar) == 0)
        luaL_argerror(L, 1, "invalid level");
      lua_getinfo(L, "f", &ar);
      if (lua_isnil(L, -1))
        luaL_error(L, "no function environment for tail call at level %d",
                      level);
    }
  }
  
  
  static int luaB_getfenv (lua_State *L) {
    getfunc(L, 1);
    if (lua_iscfunction(L, -1))  /* is a C function? */
      lua_pushvalue(L, LUA_GLOBALSINDEX);  /* return the thread's global env. */
    else
      lua_getfenv(L, -1);
    return 1;
  }
  
  
  static int luaB_setfenv (lua_State *L) {
    luaL_checktype(L, 2, LUA_TTABLE);
    getfunc(L, 0);
    lua_pushvalue(L, 2);
    if (lua_isnumber(L, 1) && lua_tonumber(L, 1) == 0) {
      /* change environment of current thread */
      lua_pushthread(L);
      lua_insert(L, -2);
      lua_setfenv(L, -2);
      return 0;
    }
    else if (lua_iscfunction(L, -2) || lua_setfenv(L, -2) == 0)
      luaL_error(L,
            LUA_QL("setfenv") " cannot change environment of given object");
    return 1;
  }
  
  
  static int luaB_rawequal (lua_State *L) {
    luaL_checkany(L, 1);
    luaL_checkany(L, 2);
    lua_pushboolean(L, lua_rawequal(L, 1, 2));
    return 1;
  }
  
  
  static int luaB_rawget (lua_State *L) {
    luaL_checkanytable(L, 1);
    luaL_checkany(L, 2);
    lua_settop(L, 2);
    lua_rawget(L, 1);
    return 1;
  }
  
  static int luaB_rawset (lua_State *L) {
    luaL_checktype(L, 1, LUA_TTABLE);
    luaL_checkany(L, 2);
    luaL_checkany(L, 3);
    lua_settop(L, 3);
    lua_rawset(L, 1);
    return 1;
  }
  
  
  static int luaB_gcinfo (lua_State *L) {
    lua_pushinteger(L, lua_getgccount(L));
    return 1;
  }
  
  
  static int luaB_collectgarbage (lua_State *L) {
    static const char *const opts[] = {"stop", "restart", "collect",
      "count", "step", "setpause", "setstepmul","setmemlimit","getmemlimit", NULL};
    static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
      LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL,
  		LUA_GCSETMEMLIMIT,LUA_GCGETMEMLIMIT};
    int o = luaL_checkoption(L, 1, "collect", opts);
    int ex = luaL_optint(L, 2, 0);
    int res = lua_gc(L, optsnum[o], ex);
    switch (optsnum[o]) {
      case LUA_GCCOUNT: {
        int b = lua_gc(L, LUA_GCCOUNTB, 0);
        lua_pushnumber(L, res + ((lua_Number)b/1024));
        return 1;
      }
      case LUA_GCSTEP: {
        lua_pushboolean(L, res);
        return 1;
      }
      default: {
        lua_pushnumber(L, res);
        return 1;
      }
    }
  }
  
  
  static int luaB_type (lua_State *L) {
    luaL_checkany(L, 1);
    lua_pushstring(L, luaL_typename(L, 1));
    return 1;
  }
  
  
  static int luaB_next (lua_State *L) {
    luaL_checkanytable(L, 1);
    lua_settop(L, 2);  /* create a 2nd argument if there isn't one */
    if (lua_next(L, 1))
      return 2;
    else {
      lua_pushnil(L);
      return 1;
    }
  }
  
  
  static int luaB_pairs (lua_State *L) {
    luaL_checkanytable(L, 1);
    lua_pushvalue(L, lua_upvalueindex(1));  /* return generator, */
    lua_pushvalue(L, 1);  /* state, */
    lua_pushnil(L);  /* and initial value */
    return 3;
  }
  
  
  static int ipairsaux (lua_State *L) {
    int i = luaL_checkint(L, 2);
    luaL_checkanytable(L, 1);
    i++;  /* next value */
    lua_pushinteger(L, i);
    lua_rawgeti(L, 1, i);
    return (lua_isnil(L, -1)) ? 0 : 2;
  }
  
  
  static int luaB_ipairs (lua_State *L) {
    luaL_checkanytable(L, 1);
    lua_pushvalue(L, lua_upvalueindex(1));  /* return generator, */
    lua_pushvalue(L, 1);  /* state, */
    lua_pushinteger(L, 0);  /* and initial value */
    return 3;
  }
  
  
  static int load_aux (lua_State *L, int status) {
    if (status == 0)  /* OK? */
      return 1;
    else {
      lua_pushnil(L);
      lua_insert(L, -2);  /* put before error message */
      return 2;  /* return nil plus error message */
    }
  }
  
  
  static int luaB_loadstring (lua_State *L) {
    size_t l;
    const char *s = luaL_checklstring(L, 1, &l);
    const char *chunkname = luaL_optstring(L, 2, s);
    return load_aux(L, luaL_loadbuffer(L, s, l, chunkname));
  }
  
  
  static int luaB_loadfile (lua_State *L) {
    const char *fname = luaL_optstring(L, 1, NULL);
  #if 0
    return load_aux(L, luaL_loadfile(L, fname));
  #else
    return load_aux(L, luaL_loadfsfile(L, fname));
  #endif
  }
  
  
  /*
  ** Reader for generic `load' function: `lua_load' uses the
  ** stack for internal stuff, so the reader cannot change the
  ** stack top. Instead, it keeps its resulting string in a
  ** reserved slot inside the stack.
  */
  static const char *generic_reader (lua_State *L, void *ud, size_t *size) {
    (void)ud;  /* to avoid warnings */
    if (L == NULL && size == NULL) // direct mode check, doesn't happen
      return NULL;
    luaL_checkstack(L, 2, "too many nested functions");
    lua_pushvalue(L, 1);  /* get function */
    lua_call(L, 0, 1);  /* call it */
    if (lua_isnil(L, -1)) {
      *size = 0;
      return NULL;
    }
    else if (lua_isstring(L, -1)) {
      lua_replace(L, 3);  /* save string in a reserved stack slot */
      return lua_tolstring(L, 3, size);
    }
    else luaL_error(L, "reader function must return a string");
    return NULL;  /* to avoid warnings */
  }
  
  
  static int luaB_load (lua_State *L) {
    int status;
    const char *cname = luaL_optstring(L, 2, "=(load)");
    luaL_checktype(L, 1, LUA_TFUNCTION);
    lua_settop(L, 3);  /* function, eventual name, plus one reserved slot */
    status = lua_load(L, generic_reader, NULL, cname);
    return load_aux(L, status);
  }
  
  
  static int luaB_dofile (lua_State *L) {
    const char *fname = luaL_optstring(L, 1, NULL);
    int n = lua_gettop(L);
  #if 0
    if (luaL_loadfile(L, fname) != 0) lua_error(L);
  #else
    if (luaL_loadfsfile(L, fname) != 0) lua_error(L);
  #endif
    lua_call(L, 0, LUA_MULTRET);
    return lua_gettop(L) - n;
  }
  
  
  static int luaB_assert (lua_State *L) {
    luaL_checkany(L, 1);
    if (!lua_toboolean(L, 1))
      return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!"));
    return lua_gettop(L);
  }
  
  
  static int luaB_unpack (lua_State *L) {
    int i, e, n;
    luaL_checktype(L, 1, LUA_TTABLE);
    i = luaL_optint(L, 2, 1);
    e = luaL_opt(L, luaL_checkint, 3, luaL_getn(L, 1));
    if (i > e) return 0;  /* empty range */
    n = e - i + 1;  /* number of elements */
    if (n <= 0 || !lua_checkstack(L, n))  /* n <= 0 means arith. overflow */
      return luaL_error(L, "too many results to unpack");
    lua_rawgeti(L, 1, i);  /* push arg[i] (avoiding overflow problems) */
    while (i++ < e)  /* push arg[i + 1...e] */
      lua_rawgeti(L, 1, i);
    return n;
  }
  
  
  static int luaB_select (lua_State *L) {
    int n = lua_gettop(L);
    if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') {
      lua_pushinteger(L, n-1);
      return 1;
    }
    else {
      int i = luaL_checkint(L, 1);
      if (i < 0) i = n + i;
      else if (i > n) i = n;
      luaL_argcheck(L, 1 <= i, 1, "index out of range");
      return n - i;
    }
  }
  
  
  static int luaB_pcall (lua_State *L) {
    int status;
    luaL_checkany(L, 1);
    status = lua_pcall(L, lua_gettop(L) - 1, LUA_MULTRET, 0);
    lua_pushboolean(L, (status == 0));
    lua_insert(L, 1);
    return lua_gettop(L);  /* return status + all results */
  }
  
  
  static int luaB_xpcall (lua_State *L) {
    int status;
    luaL_checkany(L, 2);
    lua_settop(L, 2);
    lua_insert(L, 1);  /* put error function under function to be called */
    status = lua_pcall(L, 0, LUA_MULTRET, 1);
    lua_pushboolean(L, (status == 0));
    lua_replace(L, 1);
    return lua_gettop(L);  /* return status + all results */
  }
  
  
  static int luaB_tostring (lua_State *L) {
    luaL_checkany(L, 1);
    if (luaL_callmeta(L, 1, "__tostring"))  /* is there a metafield? */
      return 1;  /* use its value */
    switch (lua_type(L, 1)) {
      case LUA_TNUMBER:
        lua_pushstring(L, lua_tostring(L, 1));
        break;
      case LUA_TSTRING:
        lua_pushvalue(L, 1);
        break;
      case LUA_TBOOLEAN:
        lua_pushstring(L, (lua_toboolean(L, 1) ? "true" : "false"));
        break;
      case LUA_TNIL:
        lua_pushliteral(L, "nil");
        break;
      default:
        lua_pushfstring(L, "%s: %p", luaL_typename(L, 1), lua_topointer(L, 1));
        break;
    }
    return 1;
  }
  
  
  static int luaB_newproxy (lua_State *L) {
    lua_settop(L, 1);
    lua_newuserdata(L, 0);  /* create proxy */
    if (lua_toboolean(L, 1) == 0)
      return 1;  /* no metatable */
    else if (lua_isboolean(L, 1)) {
      lua_newtable(L);  /* create a new metatable `m' ... */
      lua_pushvalue(L, -1);  /* ... and mark `m' as a valid metatable */
      lua_pushboolean(L, 1);
      lua_rawset(L, lua_upvalueindex(1));  /* weaktable[m] = true */
    }
    else {
      int validproxy = 0;  /* to check if weaktable[metatable(u)] == true */
      if (lua_getmetatable(L, 1)) {
        lua_rawget(L, lua_upvalueindex(1));
        validproxy = lua_toboolean(L, -1);
        lua_pop(L, 1);  /* remove value */
      }
      luaL_argcheck(L, validproxy, 1, "boolean or proxy expected");
      lua_getmetatable(L, 1);  /* metatable is valid; get it */
    }
    lua_setmetatable(L, 2);
    return 1;
  }
  
  #define LUA_BASELIB_FUNCLIST\
    {LSTRKEY("assert"), LFUNCVAL(luaB_assert)},\
    {LSTRKEY("collectgarbage"), LFUNCVAL(luaB_collectgarbage)},\
    {LSTRKEY("dofile"), LFUNCVAL(luaB_dofile)},\
    {LSTRKEY("error"), LFUNCVAL(luaB_error)},\
    {LSTRKEY("gcinfo"), LFUNCVAL(luaB_gcinfo)},\
    {LSTRKEY("getfenv"), LFUNCVAL(luaB_getfenv)},\
    {LSTRKEY("getmetatable"), LFUNCVAL(luaB_getmetatable)},\
    {LSTRKEY("loadfile"), LFUNCVAL(luaB_loadfile)},\
    {LSTRKEY("load"), LFUNCVAL(luaB_load)},\
    {LSTRKEY("loadstring"), LFUNCVAL(luaB_loadstring)},\
    {LSTRKEY("next"), LFUNCVAL(luaB_next)},\
    {LSTRKEY("pcall"), LFUNCVAL(luaB_pcall)},\
    {LSTRKEY("print"), LFUNCVAL(luaB_print)},\
    {LSTRKEY("rawequal"), LFUNCVAL(luaB_rawequal)},\
    {LSTRKEY("rawget"), LFUNCVAL(luaB_rawget)},\
    {LSTRKEY("rawset"), LFUNCVAL(luaB_rawset)},\
    {LSTRKEY("select"), LFUNCVAL(luaB_select)},\
    {LSTRKEY("setfenv"), LFUNCVAL(luaB_setfenv)},\
    {LSTRKEY("setmetatable"), LFUNCVAL(luaB_setmetatable)},\
    {LSTRKEY("tonumber"), LFUNCVAL(luaB_tonumber)},\
    {LSTRKEY("tostring"), LFUNCVAL(luaB_tostring)},\
    {LSTRKEY("type"), LFUNCVAL(luaB_type)},\
    {LSTRKEY("unpack"), LFUNCVAL(luaB_unpack)},\
    {LSTRKEY("xpcall"), LFUNCVAL(luaB_xpcall)}
    
  #if LUA_OPTIMIZE_MEMORY == 2
  #define MIN_OPT_LEVEL 2
  #include "lrodefs.h"
  const LUA_REG_TYPE base_funcs_list[] = {
    LUA_BASELIB_FUNCLIST,
    {LNILKEY, LNILVAL}
  };
  #endif
  
  
  static int luaB_index(lua_State *L) {
  #if LUA_OPTIMIZE_MEMORY == 2
    int fres;
    if ((fres = luaR_findfunction(L, base_funcs_list)) != 0)
      return fres;
  #endif  
    const char *keyname = luaL_checkstring(L, 2);
    if (!c_strcmp(keyname, "_VERSION")) {
      lua_pushliteral(L, LUA_VERSION);
      return 1;
    }
    void *res = luaR_findglobal(keyname, c_strlen(keyname));
    if (!res)
      return 0;
    else {
      lua_pushrotable(L, res);
      return 1;
    }
  }
  
  static const luaL_Reg base_funcs[] = {
  #if LUA_OPTIMIZE_MEMORY != 2
  #undef MIN_OPT_LEVEL
  #define MIN_OPT_LEVEL 0
  #include "lrodefs.h"
    LUA_BASELIB_FUNCLIST,
  #endif
    {"__index", luaB_index},
    {NULL, NULL}
  };
  
  
  /*
  ** {======================================================
  ** Coroutine library
  ** =======================================================
  */
  
  #define CO_RUN	0	/* running */
  #define CO_SUS	1	/* suspended */
  #define CO_NOR	2	/* 'normal' (it resumed another coroutine) */
  #define CO_DEAD	3
  
  static const char *const statnames[] =
      {"running", "suspended", "normal", "dead"};
  
  static int costatus (lua_State *L, lua_State *co) {
    if (L == co) return CO_RUN;
    switch (lua_status(co)) {
      case LUA_YIELD:
        return CO_SUS;
      case 0: {
        lua_Debug ar;
        if (lua_getstack(co, 0, &ar) > 0)  /* does it have frames? */
          return CO_NOR;  /* it is running */
        else if (lua_gettop(co) == 0)
            return CO_DEAD;
        else
          return CO_SUS;  /* initial state */
      }
      default:  /* some error occured */
        return CO_DEAD;
    }
  }
  
  
  static int luaB_costatus (lua_State *L) {
    lua_State *co = lua_tothread(L, 1);
    luaL_argcheck(L, co, 1, "coroutine expected");
    lua_pushstring(L, statnames[costatus(L, co)]);
    return 1;
  }
  
  
  static int auxresume (lua_State *L, lua_State *co, int narg) {
    int status = costatus(L, co);
    if (!lua_checkstack(co, narg))
      luaL_error(L, "too many arguments to resume");
    if (status != CO_SUS) {
      lua_pushfstring(L, "cannot resume %s coroutine", statnames[status]);
      return -1;  /* error flag */
    }
    lua_xmove(L, co, narg);
    lua_setlevel(L, co);
    status = lua_resume(co, narg);
    if (status == 0 || status == LUA_YIELD) {
      int nres = lua_gettop(co);
      if (!lua_checkstack(L, nres + 1))
        luaL_error(L, "too many results to resume");
      lua_xmove(co, L, nres);  /* move yielded values */
      return nres;
    }
    else {
      lua_xmove(co, L, 1);  /* move error message */
      return -1;  /* error flag */
    }
  }
  
  
  static int luaB_coresume (lua_State *L) {
    lua_State *co = lua_tothread(L, 1);
    int r;
    luaL_argcheck(L, co, 1, "coroutine expected");
    r = auxresume(L, co, lua_gettop(L) - 1);
    if (r < 0) {
      lua_pushboolean(L, 0);
      lua_insert(L, -2);
      return 2;  /* return false + error message */
    }
    else {
      lua_pushboolean(L, 1);
      lua_insert(L, -(r + 1));
      return r + 1;  /* return true + `resume' returns */
    }
  }
  
  
  static int luaB_auxwrap (lua_State *L) {
    lua_State *co = lua_tothread(L, lua_upvalueindex(1));
    int r = auxresume(L, co, lua_gettop(L));
    if (r < 0) {
      if (lua_isstring(L, -1)) {  /* error object is a string? */
        luaL_where(L, 1);  /* add extra info */
        lua_insert(L, -2);
        lua_concat(L, 2);
      }
      lua_error(L);  /* propagate error */
    }
    return r;
  }
  
  
  static int luaB_cocreate (lua_State *L) {
    lua_State *NL = lua_newthread(L);
    luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,
      "Lua function expected");
    lua_pushvalue(L, 1);  /* move function to top */
    lua_xmove(L, NL, 1);  /* move function from L to NL */
    return 1;
  }
  
  
  static int luaB_cowrap (lua_State *L) {
    luaB_cocreate(L);
    lua_pushcclosure(L, luaB_auxwrap, 1);
    return 1;
  }
  
  
  static int luaB_yield (lua_State *L) {
    return lua_yield(L, lua_gettop(L));
  }
  
  
  static int luaB_corunning (lua_State *L) {
    if (lua_pushthread(L))
      lua_pushnil(L);  /* main thread is not a coroutine */
    return 1;
  }
  
  #undef MIN_OPT_LEVEL
  #define MIN_OPT_LEVEL 1
  #include "lrodefs.h"
  const LUA_REG_TYPE co_funcs[] = {
    {LSTRKEY("create"), LFUNCVAL(luaB_cocreate)},
    {LSTRKEY("resume"), LFUNCVAL(luaB_coresume)},
    {LSTRKEY("running"), LFUNCVAL(luaB_corunning)},
    {LSTRKEY("status"), LFUNCVAL(luaB_costatus)},
    {LSTRKEY("wrap"), LFUNCVAL(luaB_cowrap)},
    {LSTRKEY("yield"), LFUNCVAL(luaB_yield)},
    {LNILKEY, LNILVAL}
  };
  
  /* }====================================================== */
  
  
  static void auxopen (lua_State *L, const char *name,
                       lua_CFunction f, lua_CFunction u) {
    lua_pushcfunction(L, u);
    lua_pushcclosure(L, f, 1);
    lua_setfield(L, -2, name);
  }
  
  
  static void base_open (lua_State *L) {
    /* set global _G */
    lua_pushvalue(L, LUA_GLOBALSINDEX);
    lua_setglobal(L, "_G");
    /* open lib into global table */
    luaL_register_light(L, "_G", base_funcs);
  #if LUA_OPTIMIZE_MEMORY > 0
    lua_pushvalue(L, -1);
    lua_setmetatable(L, -2);  
  #else
    lua_pushliteral(L, LUA_VERSION);
    lua_setglobal(L, "_VERSION");  /* set global _VERSION */
  #endif
    /* `ipairs' and `pairs' need auxliliary functions as upvalues */
    auxopen(L, "ipairs", luaB_ipairs, ipairsaux);
    auxopen(L, "pairs", luaB_pairs, luaB_next);
    /* `newproxy' needs a weaktable as upvalue */
    lua_createtable(L, 0, 1);  /* new table `w' */
    lua_pushvalue(L, -1);  /* `w' will be its own metatable */
    lua_setmetatable(L, -2);
    lua_pushliteral(L, "kv");
    lua_setfield(L, -2, "__mode");  /* metatable(w).__mode = "kv" */
    lua_pushcclosure(L, luaB_newproxy, 1);
    lua_setglobal(L, "newproxy");  /* set global `newproxy' */
  }
  
  
  LUALIB_API int luaopen_base (lua_State *L) {
    base_open(L);
  #if LUA_OPTIMIZE_MEMORY == 0
    luaL_register(L, LUA_COLIBNAME, co_funcs);
    return 2;
  #else
    return 1;
  #endif
  }
  