Move stuff around

16 files changed, 0 insertions, 7434 deletions

diff --git a/src/lib/lualib/lauxlib.c b/src/lib/lualib/lauxlib.c
deleted file mode 100644
index bacf43b..0000000
--- a/src/lib/lualib/lauxlib.c
+++ /dev/null
@@ -1,1035 +0,0 @@
-/*
-** $Id: lauxlib.c,v 1.286 2016/01/08 15:33:09 roberto Exp $
-** Auxiliary functions for building Lua libraries
-** See Copyright Notice in lua.h
-*/
-
-#define lauxlib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <errno.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-
-/*
-** This file uses only the official API of Lua.
-** Any function declared here could be written as an application function.
-*/
-
-#include "lua.h"
-
-#include "lauxlib.h"
-
-
-/*
-** {======================================================
-** Traceback
-** =======================================================
-*/
-
-
-#define LEVELS1	10	/* size of the first part of the stack */
-#define LEVELS2	11	/* size of the second part of the stack */
-
-
-
-/*
-** search for 'objidx' in table at index -1.
-** return 1 + string at top if find a good name.
-*/
-static int findfield (lua_State *L, int objidx, int level) {
-  if (level == 0 || !lua_istable(L, -1))
-    return 0;  /* not found */
-  lua_pushnil(L);  /* start 'next' loop */
-  while (lua_next(L, -2)) {  /* for each pair in table */
-    if (lua_type(L, -2) == LUA_TSTRING) {  /* ignore non-string keys */
-      if (lua_rawequal(L, objidx, -1)) {  /* found object? */
-        lua_pop(L, 1);  /* remove value (but keep name) */
-        return 1;
-      }
-      else if (findfield(L, objidx, level - 1)) {  /* try recursively */
-        lua_remove(L, -2);  /* remove table (but keep name) */
-        lua_pushliteral(L, ".");
-        lua_insert(L, -2);  /* place '.' between the two names */
-        lua_concat(L, 3);
-        return 1;
-      }
-    }
-    lua_pop(L, 1);  /* remove value */
-  }
-  return 0;  /* not found */
-}
-
-
-/*
-** Search for a name for a function in all loaded modules
-** (registry._LOADED).
-*/
-static int pushglobalfuncname (lua_State *L, lua_Debug *ar) {
-  int top = lua_gettop(L);
-  lua_getinfo(L, "f", ar);  /* push function */
-  lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
-  if (findfield(L, top + 1, 2)) {
-    const char *name = lua_tostring(L, -1);
-    if (strncmp(name, "_G.", 3) == 0) {  /* name start with '_G.'? */
-      lua_pushstring(L, name + 3);  /* push name without prefix */
-      lua_remove(L, -2);  /* remove original name */
-    }
-    lua_copy(L, -1, top + 1);  /* move name to proper place */
-    lua_pop(L, 2);  /* remove pushed values */
-    return 1;
-  }
-  else {
-    lua_settop(L, top);  /* remove function and global table */
-    return 0;
-  }
-}
-
-
-static void pushfuncname (lua_State *L, lua_Debug *ar) {
-  if (pushglobalfuncname(L, ar)) {  /* try first a global name */
-    lua_pushfstring(L, "function '%s'", lua_tostring(L, -1));
-    lua_remove(L, -2);  /* remove name */
-  }
-  else if (*ar->namewhat != '\0')  /* is there a name from code? */
-    lua_pushfstring(L, "%s '%s'", ar->namewhat, ar->name);  /* use it */
-  else if (*ar->what == 'm')  /* main? */
-      lua_pushliteral(L, "main chunk");
-  else if (*ar->what != 'C')  /* for Lua functions, use <file:line> */
-    lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined);
-  else  /* nothing left... */
-    lua_pushliteral(L, "?");
-}
-
-
-static int lastlevel (lua_State *L) {
-  lua_Debug ar;
-  int li = 1, le = 1;
-  /* find an upper bound */
-  while (lua_getstack(L, le, &ar)) { li = le; le *= 2; }
-  /* do a binary search */
-  while (li < le) {
-    int m = (li + le)/2;
-    if (lua_getstack(L, m, &ar)) li = m + 1;
-    else le = m;
-  }
-  return le - 1;
-}
-
-
-LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1,
-                                const char *msg, int level) {
-  lua_Debug ar;
-  int top = lua_gettop(L);
-  int last = lastlevel(L1);
-  int n1 = (last - level > LEVELS1 + LEVELS2) ? LEVELS1 : -1;
-  if (msg)
-    lua_pushfstring(L, "%s\n", msg);
-  luaL_checkstack(L, 10, NULL);
-  lua_pushliteral(L, "stack traceback:");
-  while (lua_getstack(L1, level++, &ar)) {
-    if (n1-- == 0) {  /* too many levels? */
-      lua_pushliteral(L, "\n\t...");  /* add a '...' */
-      level = last - LEVELS2 + 1;  /* and skip to last ones */
-    }
-    else {
-      lua_getinfo(L1, "Slnt", &ar);
-      lua_pushfstring(L, "\n\t%s:", ar.short_src);
-      if (ar.currentline > 0)
-        lua_pushfstring(L, "%d:", ar.currentline);
-      lua_pushliteral(L, " in ");
-      pushfuncname(L, &ar);
-      if (ar.istailcall)
-        lua_pushliteral(L, "\n\t(...tail calls...)");
-      lua_concat(L, lua_gettop(L) - top);
-    }
-  }
-  lua_concat(L, lua_gettop(L) - top);
-}
-
-/* }====================================================== */
-
-
-/*
-** {======================================================
-** Error-report functions
-** =======================================================
-*/
-
-LUALIB_API int luaL_argerror (lua_State *L, int arg, const char *extramsg) {
-  lua_Debug ar;
-  if (!lua_getstack(L, 0, &ar))  /* no stack frame? */
-    return luaL_error(L, "bad argument #%d (%s)", arg, extramsg);
-  lua_getinfo(L, "n", &ar);
-  if (strcmp(ar.namewhat, "method") == 0) {
-    arg--;  /* do not count 'self' */
-    if (arg == 0)  /* error is in the self argument itself? */
-      return luaL_error(L, "calling '%s' on bad self (%s)",
-                           ar.name, extramsg);
-  }
-  if (ar.name == NULL)
-    ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?";
-  return luaL_error(L, "bad argument #%d to '%s' (%s)",
-                        arg, ar.name, extramsg);
-}
-
-
-static int typeerror (lua_State *L, int arg, const char *tname) {
-  const char *msg;
-  const char *typearg;  /* name for the type of the actual argument */
-  if (luaL_getmetafield(L, arg, "__name") == LUA_TSTRING)
-    typearg = lua_tostring(L, -1);  /* use the given type name */
-  else if (lua_type(L, arg) == LUA_TLIGHTUSERDATA)
-    typearg = "light userdata";  /* special name for messages */
-  else
-    typearg = luaL_typename(L, arg);  /* standard name */
-  msg = lua_pushfstring(L, "%s expected, got %s", tname, typearg);
-  return luaL_argerror(L, arg, msg);
-}
-
-
-static void tag_error (lua_State *L, int arg, int tag) {
-  typeerror(L, arg, lua_typename(L, tag));
-}
-
-
-/*
-** The use of 'lua_pushfstring' ensures this function does not
-** need reserved stack space when called.
-*/
-LUALIB_API void luaL_where (lua_State *L, int level) {
-  lua_Debug ar;
-  if (lua_getstack(L, level, &ar)) {  /* check function at level */
-    lua_getinfo(L, "Sl", &ar);  /* get info about it */
-    if (ar.currentline > 0) {  /* is there info? */
-      lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline);
-      return;
-    }
-  }
-  lua_pushfstring(L, "");  /* else, no information available... */
-}
-
-
-/*
-** Again, the use of 'lua_pushvfstring' ensures this function does
-** not need reserved stack space when called. (At worst, it generates
-** an error with "stack overflow" instead of the given message.)
-*/
-LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {
-  va_list argp;
-  va_start(argp, fmt);
-  luaL_where(L, 1);
-  lua_pushvfstring(L, fmt, argp);
-  va_end(argp);
-  lua_concat(L, 2);
-  return lua_error(L);
-}
-
-
-LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
-  int en = errno;  /* calls to Lua API may change this value */
-  if (stat) {
-    lua_pushboolean(L, 1);
-    return 1;
-  }
-  else {
-    lua_pushnil(L);
-    if (fname)
-      lua_pushfstring(L, "%s: %s", fname, strerror(en));
-    else
-      lua_pushstring(L, strerror(en));
-    lua_pushinteger(L, en);
-    return 3;
-  }
-}
-
-
-#if !defined(l_inspectstat)	/* { */
-
-#if defined(LUA_USE_POSIX)
-
-#include <sys/wait.h>
-
-/*
-** use appropriate macros to interpret 'pclose' return status
-*/
-#define l_inspectstat(stat,what)  \
-   if (WIFEXITED(stat)) { stat = WEXITSTATUS(stat); } \
-   else if (WIFSIGNALED(stat)) { stat = WTERMSIG(stat); what = "signal"; }
-
-#else
-
-#define l_inspectstat(stat,what)  /* no op */
-
-#endif
-
-#endif				/* } */
-
-
-LUALIB_API int luaL_execresult (lua_State *L, int stat) {
-  const char *what = "exit";  /* type of termination */
-  if (stat == -1)  /* error? */
-    return luaL_fileresult(L, 0, NULL);
-  else {
-    l_inspectstat(stat, what);  /* interpret result */
-    if (*what == 'e' && stat == 0)  /* successful termination? */
-      lua_pushboolean(L, 1);
-    else
-      lua_pushnil(L);
-    lua_pushstring(L, what);
-    lua_pushinteger(L, stat);
-    return 3;  /* return true/nil,what,code */
-  }
-}
-
-/* }====================================================== */
-
-
-/*
-** {======================================================
-** Userdata's metatable manipulation
-** =======================================================
-*/
-
-LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {
-  if (luaL_getmetatable(L, tname) != LUA_TNIL)  /* name already in use? */
-    return 0;  /* leave previous value on top, but return 0 */
-  lua_pop(L, 1);
-  lua_createtable(L, 0, 2);  /* create metatable */
-  lua_pushstring(L, tname);
-  lua_setfield(L, -2, "__name");  /* metatable.__name = tname */
-  lua_pushvalue(L, -1);
-  lua_setfield(L, LUA_REGISTRYINDEX, tname);  /* registry.name = metatable */
-  return 1;
-}
-
-
-LUALIB_API void luaL_setmetatable (lua_State *L, const char *tname) {
-  luaL_getmetatable(L, tname);
-  lua_setmetatable(L, -2);
-}
-
-
-LUALIB_API void *luaL_testudata (lua_State *L, int ud, const char *tname) {
-  void *p = lua_touserdata(L, ud);
-  if (p != NULL) {  /* value is a userdata? */
-    if (lua_getmetatable(L, ud)) {  /* does it have a metatable? */
-      luaL_getmetatable(L, tname);  /* get correct metatable */
-      if (!lua_rawequal(L, -1, -2))  /* not the same? */
-        p = NULL;  /* value is a userdata with wrong metatable */
-      lua_pop(L, 2);  /* remove both metatables */
-      return p;
-    }
-  }
-  return NULL;  /* value is not a userdata with a metatable */
-}
-
-
-LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) {
-  void *p = luaL_testudata(L, ud, tname);
-  if (p == NULL) typeerror(L, ud, tname);
-  return p;
-}
-
-/* }====================================================== */
-
-
-/*
-** {======================================================
-** Argument check functions
-** =======================================================
-*/
-
-LUALIB_API int luaL_checkoption (lua_State *L, int arg, const char *def,
-                                 const char *const lst[]) {
-  const char *name = (def) ? luaL_optstring(L, arg, def) :
-                             luaL_checkstring(L, arg);
-  int i;
-  for (i=0; lst[i]; i++)
-    if (strcmp(lst[i], name) == 0)
-      return i;
-  return luaL_argerror(L, arg,
-                       lua_pushfstring(L, "invalid option '%s'", name));
-}
-
-
-/*
-** Ensures the stack has at least 'space' extra slots, raising an error
-** if it cannot fulfill the request. (The error handling needs a few
-** extra slots to format the error message. In case of an error without
-** this extra space, Lua will generate the same 'stack overflow' error,
-** but without 'msg'.)
-*/
-LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) {
-  if (!lua_checkstack(L, space)) {
-    if (msg)
-      luaL_error(L, "stack overflow (%s)", msg);
-    else
-      luaL_error(L, "stack overflow");
-  }
-}
-
-
-LUALIB_API void luaL_checktype (lua_State *L, int arg, int t) {
-  if (lua_type(L, arg) != t)
-    tag_error(L, arg, t);
-}
-
-
-LUALIB_API void luaL_checkany (lua_State *L, int arg) {
-  if (lua_type(L, arg) == LUA_TNONE)
-    luaL_argerror(L, arg, "value expected");
-}
-
-
-LUALIB_API const char *luaL_checklstring (lua_State *L, int arg, size_t *len) {
-  const char *s = lua_tolstring(L, arg, len);
-  if (!s) tag_error(L, arg, LUA_TSTRING);
-  return s;
-}
-
-
-LUALIB_API const char *luaL_optlstring (lua_State *L, int arg,
-                                        const char *def, size_t *len) {
-  if (lua_isnoneornil(L, arg)) {
-    if (len)
-      *len = (def ? strlen(def) : 0);
-    return def;
-  }
-  else return luaL_checklstring(L, arg, len);
-}
-
-
-LUALIB_API lua_Number luaL_checknumber (lua_State *L, int arg) {
-  int isnum;
-  lua_Number d = lua_tonumberx(L, arg, &isnum);
-  if (!isnum)
-    tag_error(L, arg, LUA_TNUMBER);
-  return d;
-}
-
-
-LUALIB_API lua_Number luaL_optnumber (lua_State *L, int arg, lua_Number def) {
-  return luaL_opt(L, luaL_checknumber, arg, def);
-}
-
-
-static void interror (lua_State *L, int arg) {
-  if (lua_isnumber(L, arg))
-    luaL_argerror(L, arg, "number has no integer representation");
-  else
-    tag_error(L, arg, LUA_TNUMBER);
-}
-
-
-LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int arg) {
-  int isnum;
-  lua_Integer d = lua_tointegerx(L, arg, &isnum);
-  if (!isnum) {
-    interror(L, arg);
-  }
-  return d;
-}
-
-
-LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int arg,
-                                                      lua_Integer def) {
-  return luaL_opt(L, luaL_checkinteger, arg, def);
-}
-
-/* }====================================================== */
-
-
-/*
-** {======================================================
-** Generic Buffer manipulation
-** =======================================================
-*/
-
-/* userdata to box arbitrary data */
-typedef struct UBox {
-  void *box;
-  size_t bsize;
-} UBox;
-
-
-static void *resizebox (lua_State *L, int idx, size_t newsize) {
-  void *ud;
-  lua_Alloc allocf = lua_getallocf(L, &ud);
-  UBox *box = (UBox *)lua_touserdata(L, idx);
-  void *temp = allocf(ud, box->box, box->bsize, newsize);
-  if (temp == NULL && newsize > 0) {  /* allocation error? */
-    resizebox(L, idx, 0);  /* free buffer */
-    luaL_error(L, "not enough memory for buffer allocation");
-  }
-  box->box = temp;
-  box->bsize = newsize;
-  return temp;
-}
-
-
-static int boxgc (lua_State *L) {
-  resizebox(L, 1, 0);
-  return 0;
-}
-
-
-static void *newbox (lua_State *L, size_t newsize) {
-  UBox *box = (UBox *)lua_newuserdata(L, sizeof(UBox));
-  box->box = NULL;
-  box->bsize = 0;
-  if (luaL_newmetatable(L, "LUABOX")) {  /* creating metatable? */
-    lua_pushcfunction(L, boxgc);
-    lua_setfield(L, -2, "__gc");  /* metatable.__gc = boxgc */
-  }
-  lua_setmetatable(L, -2);
-  return resizebox(L, -1, newsize);
-}
-
-
-/*
-** check whether buffer is using a userdata on the stack as a temporary
-** buffer
-*/
-#define buffonstack(B)	((B)->b != (B)->initb)
-
-
-/*
-** returns a pointer to a free area with at least 'sz' bytes
-*/
-LUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) {
-  lua_State *L = B->L;
-  if (B->size - B->n < sz) {  /* not enough space? */
-    char *newbuff;
-    size_t newsize = B->size * 2;  /* double buffer size */
-    if (newsize - B->n < sz)  /* not big enough? */
-      newsize = B->n + sz;
-    if (newsize < B->n || newsize - B->n < sz)
-      luaL_error(L, "buffer too large");
-    /* create larger buffer */
-    if (buffonstack(B))
-      newbuff = (char *)resizebox(L, -1, newsize);
-    else {  /* no buffer yet */
-      newbuff = (char *)newbox(L, newsize);
-      memcpy(newbuff, B->b, B->n * sizeof(char));  /* copy original content */
-    }
-    B->b = newbuff;
-    B->size = newsize;
-  }
-  return &B->b[B->n];
-}
-
-
-LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) {
-  if (l > 0) {  /* avoid 'memcpy' when 's' can be NULL */
-    char *b = luaL_prepbuffsize(B, l);
-    memcpy(b, s, l * sizeof(char));
-    luaL_addsize(B, l);
-  }
-}
-
-
-LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) {
-  luaL_addlstring(B, s, strlen(s));
-}
-
-
-LUALIB_API void luaL_pushresult (luaL_Buffer *B) {
-  lua_State *L = B->L;
-  lua_pushlstring(L, B->b, B->n);
-  if (buffonstack(B)) {
-    resizebox(L, -2, 0);  /* delete old buffer */
-    lua_remove(L, -2);  /* remove its header from the stack */
-  }
-}
-
-
-LUALIB_API void luaL_pushresultsize (luaL_Buffer *B, size_t sz) {
-  luaL_addsize(B, sz);
-  luaL_pushresult(B);
-}
-
-
-LUALIB_API void luaL_addvalue (luaL_Buffer *B) {
-  lua_State *L = B->L;
-  size_t l;
-  const char *s = lua_tolstring(L, -1, &l);
-  if (buffonstack(B))
-    lua_insert(L, -2);  /* put value below buffer */
-  luaL_addlstring(B, s, l);
-  lua_remove(L, (buffonstack(B)) ? -2 : -1);  /* remove value */
-}
-
-
-LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) {
-  B->L = L;
-  B->b = B->initb;
-  B->n = 0;
-  B->size = LUAL_BUFFERSIZE;
-}
-
-
-LUALIB_API char *luaL_buffinitsize (lua_State *L, luaL_Buffer *B, size_t sz) {
-  luaL_buffinit(L, B);
-  return luaL_prepbuffsize(B, sz);
-}
-
-/* }====================================================== */
-
-
-/*
-** {======================================================
-** Reference system
-** =======================================================
-*/
-
-/* index of free-list header */
-#define freelist	0
-
-
-LUALIB_API int luaL_ref (lua_State *L, int t) {
-  int ref;
-  if (lua_isnil(L, -1)) {
-    lua_pop(L, 1);  /* remove from stack */
-    return LUA_REFNIL;  /* 'nil' has a unique fixed reference */
-  }
-  t = lua_absindex(L, t);
-  lua_rawgeti(L, t, freelist);  /* get first free element */
-  ref = (int)lua_tointeger(L, -1);  /* ref = t[freelist] */
-  lua_pop(L, 1);  /* remove it from stack */
-  if (ref != 0) {  /* any free element? */
-    lua_rawgeti(L, t, ref);  /* remove it from list */
-    lua_rawseti(L, t, freelist);  /* (t[freelist] = t[ref]) */
-  }
-  else  /* no free elements */
-    ref = (int)lua_rawlen(L, t) + 1;  /* get a new reference */
-  lua_rawseti(L, t, ref);
-  return ref;
-}
-
-
-LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {
-  if (ref >= 0) {
-    t = lua_absindex(L, t);
-    lua_rawgeti(L, t, freelist);
-    lua_rawseti(L, t, ref);  /* t[ref] = t[freelist] */
-    lua_pushinteger(L, ref);
-    lua_rawseti(L, t, freelist);  /* t[freelist] = ref */
-  }
-}
-
-/* }====================================================== */
-
-
-/*
-** {======================================================
-** Load functions
-** =======================================================
-*/
-
-typedef struct LoadF {
-  int n;  /* number of pre-read characters */
-  FILE *f;  /* file being read */
-  char buff[BUFSIZ];  /* area for reading file */
-} LoadF;
-
-
-static const char *getF (lua_State *L, void *ud, size_t *size) {
-  LoadF *lf = (LoadF *)ud;
-  (void)L;  /* not used */
-  if (lf->n > 0) {  /* are there pre-read characters to be read? */
-    *size = lf->n;  /* return them (chars already in buffer) */
-    lf->n = 0;  /* no more pre-read characters */
-  }
-  else {  /* read a block from file */
-    /* 'fread' can return > 0 *and* set the EOF flag. If next call to
-       'getF' called 'fread', it might still wait for user input.
-       The next check avoids this problem. */
-    if (feof(lf->f)) return NULL;
-    *size = fread(lf->buff, 1, sizeof(lf->buff), lf->f);  /* read block */
-  }
-  return lf->buff;
-}
-
-
-static int errfile (lua_State *L, const char *what, int fnameindex) {
-  const char *serr = strerror(errno);
-  const char *filename = lua_tostring(L, fnameindex) + 1;
-  lua_pushfstring(L, "cannot %s %s: %s", what, filename, serr);
-  lua_remove(L, fnameindex);
-  return LUA_ERRFILE;
-}
-
-
-static int skipBOM (LoadF *lf) {
-  const char *p = "\xEF\xBB\xBF";  /* UTF-8 BOM mark */
-  int c;
-  lf->n = 0;
-  do {
-    c = getc(lf->f);
-    if (c == EOF || c != *(const unsigned char *)p++) return c;
-    lf->buff[lf->n++] = c;  /* to be read by the parser */
-  } while (*p != '\0');
-  lf->n = 0;  /* prefix matched; discard it */
-  return getc(lf->f);  /* return next character */
-}
-
-
-/*
-** reads the first character of file 'f' and skips an optional BOM mark
-** in its beginning plus its first line if it starts with '#'. Returns
-** true if it skipped the first line.  In any case, '*cp' has the
-** first "valid" character of the file (after the optional BOM and
-** a first-line comment).
-*/
-static int skipcomment (LoadF *lf, int *cp) {
-  int c = *cp = skipBOM(lf);
-  if (c == '#') {  /* first line is a comment (Unix exec. file)? */
-    do {  /* skip first line */
-      c = getc(lf->f);
-    } while (c != EOF && c != '\n');
-    *cp = getc(lf->f);  /* skip end-of-line, if present */
-    return 1;  /* there was a comment */
-  }
-  else return 0;  /* no comment */
-}
-
-
-LUALIB_API int luaL_loadfilex (lua_State *L, const char *filename,
-                                             const char *mode) {
-  LoadF lf;
-  int status, readstatus;
-  int c;
-  int fnameindex = lua_gettop(L) + 1;  /* index of filename on the stack */
-  if (filename == NULL) {
-    lua_pushliteral(L, "=stdin");
-    lf.f = stdin;
-  }
-  else {
-    lua_pushfstring(L, "@%s", filename);
-    lf.f = fopen(filename, "r");
-    if (lf.f == NULL) return errfile(L, "open", fnameindex);
-  }
-  if (skipcomment(&lf, &c))  /* read initial portion */
-    lf.buff[lf.n++] = '\n';  /* add line to correct line numbers */
-  if (c == LUA_SIGNATURE[0] && filename) {  /* binary file? */
-    lf.f = freopen(filename, "rb", lf.f);  /* reopen in binary mode */
-    if (lf.f == NULL) return errfile(L, "reopen", fnameindex);
-    skipcomment(&lf, &c);  /* re-read initial portion */
-  }
-  if (c != EOF)
-    lf.buff[lf.n++] = c;  /* 'c' is the first character of the stream */
-  status = lua_load(L, getF, &lf, lua_tostring(L, -1), mode);
-  readstatus = ferror(lf.f);
-  if (filename) fclose(lf.f);  /* close file (even in case of errors) */
-  if (readstatus) {
-    lua_settop(L, fnameindex);  /* ignore results from 'lua_load' */
-    return errfile(L, "read", fnameindex);
-  }
-  lua_remove(L, fnameindex);
-  return status;
-}
-
-
-typedef struct LoadS {
-  const char *s;
-  size_t size;
-} LoadS;
-
-
-static const char *getS (lua_State *L, void *ud, size_t *size) {
-  LoadS *ls = (LoadS *)ud;
-  (void)L;  /* not used */
-  if (ls->size == 0) return NULL;
-  *size = ls->size;
-  ls->size = 0;
-  return ls->s;
-}
-
-
-LUALIB_API int luaL_loadbufferx (lua_State *L, const char *buff, size_t size,
-                                 const char *name, const char *mode) {
-  LoadS ls;
-  ls.s = buff;
-  ls.size = size;
-  return lua_load(L, getS, &ls, name, mode);
-}
-
-
-LUALIB_API int luaL_loadstring (lua_State *L, const char *s) {
-  return luaL_loadbuffer(L, s, strlen(s), s);
-}
-
-/* }====================================================== */
-
-
-
-LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {
-  if (!lua_getmetatable(L, obj))  /* no metatable? */
-    return LUA_TNIL;
-  else {
-    int tt;
-    lua_pushstring(L, event);
-    tt = lua_rawget(L, -2);
-    if (tt == LUA_TNIL)  /* is metafield nil? */
-      lua_pop(L, 2);  /* remove metatable and metafield */
-    else
-      lua_remove(L, -2);  /* remove only metatable */
-    return tt;  /* return metafield type */
-  }
-}
-
-
-LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
-  obj = lua_absindex(L, obj);
-  if (luaL_getmetafield(L, obj, event) == LUA_TNIL)  /* no metafield? */
-    return 0;
-  lua_pushvalue(L, obj);
-  lua_call(L, 1, 1);
-  return 1;
-}
-
-
-LUALIB_API lua_Integer luaL_len (lua_State *L, int idx) {
-  lua_Integer l;
-  int isnum;
-  lua_len(L, idx);
-  l = lua_tointegerx(L, -1, &isnum);
-  if (!isnum)
-    luaL_error(L, "object length is not an integer");
-  lua_pop(L, 1);  /* remove object */
-  return l;
-}
-
-
-LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) {
-  if (!luaL_callmeta(L, idx, "__tostring")) {  /* no metafield? */
-    switch (lua_type(L, idx)) {
-      case LUA_TNUMBER: {
-        if (lua_isinteger(L, idx))
-          lua_pushfstring(L, "%I", lua_tointeger(L, idx));
-        else
-          lua_pushfstring(L, "%f", lua_tonumber(L, idx));
-        break;
-      }
-      case LUA_TSTRING:
-        lua_pushvalue(L, idx);
-        break;
-      case LUA_TBOOLEAN:
-        lua_pushstring(L, (lua_toboolean(L, idx) ? "true" : "false"));
-        break;
-      case LUA_TNIL:
-        lua_pushliteral(L, "nil");
-        break;
-      default:
-        lua_pushfstring(L, "%s: %p", luaL_typename(L, idx),
-                                            lua_topointer(L, idx));
-        break;
-    }
-  }
-  return lua_tolstring(L, -1, len);
-}
-
-
-/*
-** {======================================================
-** Compatibility with 5.1 module functions
-** =======================================================
-*/
-#if defined(LUA_COMPAT_MODULE)
-
-static const char *luaL_findtable (lua_State *L, int idx,
-                                   const char *fname, int szhint) {
-  const char *e;
-  if (idx) lua_pushvalue(L, idx);
-  do {
-    e = strchr(fname, '.');
-    if (e == NULL) e = fname + strlen(fname);
-    lua_pushlstring(L, fname, e - fname);
-    if (lua_rawget(L, -2) == LUA_TNIL) {  /* no such field? */
-      lua_pop(L, 1);  /* remove this nil */
-      lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */
-      lua_pushlstring(L, fname, e - fname);
-      lua_pushvalue(L, -2);
-      lua_settable(L, -4);  /* set new table into field */
-    }
-    else if (!lua_istable(L, -1)) {  /* field has a non-table value? */
-      lua_pop(L, 2);  /* remove table and value */
-      return fname;  /* return problematic part of the name */
-    }
-    lua_remove(L, -2);  /* remove previous table */
-    fname = e + 1;
-  } while (*e == '.');
-  return NULL;
-}
-
-
-/*
-** Count number of elements in a luaL_Reg list.
-*/
-static int libsize (const luaL_Reg *l) {
-  int size = 0;
-  for (; l && l->name; l++) size++;
-  return size;
-}
-
-
-/*
-** Find or create a module table with a given name. The function
-** first looks at the _LOADED table and, if that fails, try a
-** global variable with that name. In any case, leaves on the stack
-** the module table.
-*/
-LUALIB_API void luaL_pushmodule (lua_State *L, const char *modname,
-                                 int sizehint) {
-  luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1);  /* get _LOADED table */
-  if (lua_getfield(L, -1, modname) != LUA_TTABLE) {  /* no _LOADED[modname]? */
-    lua_pop(L, 1);  /* remove previous result */
-    /* try global variable (and create one if it does not exist) */
-    lua_pushglobaltable(L);
-    if (luaL_findtable(L, 0, modname, sizehint) != NULL)
-      luaL_error(L, "name conflict for module '%s'", modname);
-    lua_pushvalue(L, -1);
-    lua_setfield(L, -3, modname);  /* _LOADED[modname] = new table */
-  }
-  lua_remove(L, -2);  /* remove _LOADED table */
-}
-
-
-LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
-                               const luaL_Reg *l, int nup) {
-  luaL_checkversion(L);
-  if (libname) {
-    luaL_pushmodule(L, libname, libsize(l));  /* get/create library table */
-    lua_insert(L, -(nup + 1));  /* move library table to below upvalues */
-  }
-  if (l)
-    luaL_setfuncs(L, l, nup);
-  else
-    lua_pop(L, nup);  /* remove upvalues */
-}
-
-#endif
-/* }====================================================== */
-
-/*
-** set functions from list 'l' into table at top - 'nup'; each
-** function gets the 'nup' elements at the top as upvalues.
-** Returns with only the table at the stack.
-*/
-LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
-  luaL_checkstack(L, nup, "too many upvalues");
-  for (; l->name != NULL; l++) {  /* fill the table with given functions */
-    int i;
-    for (i = 0; i < nup; i++)  /* copy upvalues to the top */
-      lua_pushvalue(L, -nup);
-    lua_pushcclosure(L, l->func, nup);  /* closure with those upvalues */
-    lua_setfield(L, -(nup + 2), l->name);
-  }
-  lua_pop(L, nup);  /* remove upvalues */
-}
-
-
-/*
-** ensure that stack[idx][fname] has a table and push that table
-** into the stack
-*/
-LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) {
-  if (lua_getfield(L, idx, fname) == LUA_TTABLE)
-    return 1;  /* table already there */
-  else {
-    lua_pop(L, 1);  /* remove previous result */
-    idx = lua_absindex(L, idx);
-    lua_newtable(L);
-    lua_pushvalue(L, -1);  /* copy to be left at top */
-    lua_setfield(L, idx, fname);  /* assign new table to field */
-    return 0;  /* false, because did not find table there */
-  }
-}
-
-
-/*
-** Stripped-down 'require': After checking "loaded" table, calls 'openf'
-** to open a module, registers the result in 'package.loaded' table and,
-** if 'glb' is true, also registers the result in the global table.
-** Leaves resulting module on the top.
-*/
-LUALIB_API void luaL_requiref (lua_State *L, const char *modname,
-                               lua_CFunction openf, int glb) {
-  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
-  lua_getfield(L, -1, modname);  /* _LOADED[modname] */
-  if (!lua_toboolean(L, -1)) {  /* package not already loaded? */
-    lua_pop(L, 1);  /* remove field */
-    lua_pushcfunction(L, openf);
-    lua_pushstring(L, modname);  /* argument to open function */
-    lua_call(L, 1, 1);  /* call 'openf' to open module */
-    lua_pushvalue(L, -1);  /* make copy of module (call result) */
-    lua_setfield(L, -3, modname);  /* _LOADED[modname] = module */
-  }
-  lua_remove(L, -2);  /* remove _LOADED table */
-  if (glb) {
-    lua_pushvalue(L, -1);  /* copy of module */
-    lua_setglobal(L, modname);  /* _G[modname] = module */
-  }
-}
-
-
-LUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *p,
-                                                               const char *r) {
-  const char *wild;
-  size_t l = strlen(p);
-  luaL_Buffer b;
-  luaL_buffinit(L, &b);
-  while ((wild = strstr(s, p)) != NULL) {
-    luaL_addlstring(&b, s, wild - s);  /* push prefix */
-    luaL_addstring(&b, r);  /* push replacement in place of pattern */
-    s = wild + l;  /* continue after 'p' */
-  }
-  luaL_addstring(&b, s);  /* push last suffix */
-  luaL_pushresult(&b);
-  return lua_tostring(L, -1);
-}
-
-
-static void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) {
-  (void)ud; (void)osize;  /* not used */
-  if (nsize == 0) {
-    free(ptr);
-    return NULL;
-  }
-  else
-    return realloc(ptr, nsize);
-}
-
-
-static int panic (lua_State *L) {
-  lua_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n",
-                        lua_tostring(L, -1));
-  return 0;  /* return to Lua to abort */
-}
-
-
-LUALIB_API lua_State *luaL_newstate (void) {
-  lua_State *L = lua_newstate(l_alloc, NULL);
-  if (L) lua_atpanic(L, &panic);
-  return L;
-}
-
-
-LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver, size_t sz) {
-  const lua_Number *v = lua_version(L);
-  if (sz != LUAL_NUMSIZES)  /* check numeric types */
-    luaL_error(L, "core and library have incompatible numeric types");
-  if (v != lua_version(NULL))
-    luaL_error(L, "multiple Lua VMs detected");
-  else if (*v != ver)
-    luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f",
-                  ver, *v);
-}
-
diff --git a/src/lib/lualib/lauxlib.h b/src/lib/lualib/lauxlib.h
deleted file mode 100644
index ddb7c22..0000000
--- a/src/lib/lualib/lauxlib.h
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
-** $Id: lauxlib.h,v 1.129 2015/11/23 11:29:43 roberto Exp $
-** Auxiliary functions for building Lua libraries
-** See Copyright Notice in lua.h
-*/
-
-
-#ifndef lauxlib_h
-#define lauxlib_h
-
-
-#include <stddef.h>
-#include <stdio.h>
-
-#include "lua.h"
-
-
-
-/* extra error code for 'luaL_load' */
-#define LUA_ERRFILE     (LUA_ERRERR+1)
-
-
-typedef struct luaL_Reg {
-  const char *name;
-  lua_CFunction func;
-} luaL_Reg;
-
-
-#define LUAL_NUMSIZES	(sizeof(lua_Integer)*16 + sizeof(lua_Number))
-
-LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver, size_t sz);
-#define luaL_checkversion(L)  \
-	  luaL_checkversion_(L, LUA_VERSION_NUM, LUAL_NUMSIZES)
-
-LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
-LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
-LUALIB_API const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len);
-LUALIB_API int (luaL_argerror) (lua_State *L, int arg, const char *extramsg);
-LUALIB_API const char *(luaL_checklstring) (lua_State *L, int arg,
-                                                          size_t *l);
-LUALIB_API const char *(luaL_optlstring) (lua_State *L, int arg,
-                                          const char *def, size_t *l);
-LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int arg);
-LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int arg, lua_Number def);
-
-LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int arg);
-LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int arg,
-                                          lua_Integer def);
-
-LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
-LUALIB_API void (luaL_checktype) (lua_State *L, int arg, int t);
-LUALIB_API void (luaL_checkany) (lua_State *L, int arg);
-
-LUALIB_API int   (luaL_newmetatable) (lua_State *L, const char *tname);
-LUALIB_API void  (luaL_setmetatable) (lua_State *L, const char *tname);
-LUALIB_API void *(luaL_testudata) (lua_State *L, int ud, const char *tname);
-LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
-
-LUALIB_API void (luaL_where) (lua_State *L, int lvl);
-LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
-
-LUALIB_API int (luaL_checkoption) (lua_State *L, int arg, const char *def,
-                                   const char *const lst[]);
-
-LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname);
-LUALIB_API int (luaL_execresult) (lua_State *L, int stat);
-
-/* predefined references */
-#define LUA_NOREF       (-2)
-#define LUA_REFNIL      (-1)
-
-LUALIB_API int (luaL_ref) (lua_State *L, int t);
-LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
-
-LUALIB_API int (luaL_loadfilex) (lua_State *L, const char *filename,
-                                               const char *mode);
-
-#define luaL_loadfile(L,f)	luaL_loadfilex(L,f,NULL)
-
-LUALIB_API int (luaL_loadbufferx) (lua_State *L, const char *buff, size_t sz,
-                                   const char *name, const char *mode);
-LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
-
-LUALIB_API lua_State *(luaL_newstate) (void);
-
-LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx);
-
-LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
-                                                  const char *r);
-
-LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup);
-
-LUALIB_API int (luaL_getsubtable) (lua_State *L, int idx, const char *fname);
-
-LUALIB_API void (luaL_traceback) (lua_State *L, lua_State *L1,
-                                  const char *msg, int level);
-
-LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname,
-                                 lua_CFunction openf, int glb);
-
-/*
-** ===============================================================
-** some useful macros
-** ===============================================================
-*/
-
-
-#define luaL_newlibtable(L,l)	\
-  lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1)
-
-#define luaL_newlib(L,l)  \
-  (luaL_checkversion(L), luaL_newlibtable(L,l), luaL_setfuncs(L,l,0))
-
-#define luaL_argcheck(L, cond,arg,extramsg)	\
-		((void)((cond) || luaL_argerror(L, (arg), (extramsg))))
-#define luaL_checkstring(L,n)	(luaL_checklstring(L, (n), NULL))
-#define luaL_optstring(L,n,d)	(luaL_optlstring(L, (n), (d), NULL))
-
-#define luaL_typename(L,i)	lua_typename(L, lua_type(L,(i)))
-
-#define luaL_dofile(L, fn) \
-	(luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0))
-
-#define luaL_dostring(L, s) \
-	(luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0))
-
-#define luaL_getmetatable(L,n)	(lua_getfield(L, LUA_REGISTRYINDEX, (n)))
-
-#define luaL_opt(L,f,n,d)	(lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
-
-#define luaL_loadbuffer(L,s,sz,n)	luaL_loadbufferx(L,s,sz,n,NULL)
-
-
-/*
-** {======================================================
-** Generic Buffer manipulation
-** =======================================================
-*/
-
-typedef struct luaL_Buffer {
-  char *b;  /* buffer address */
-  size_t size;  /* buffer size */
-  size_t n;  /* number of characters in buffer */
-  lua_State *L;
-  char initb[LUAL_BUFFERSIZE];  /* initial buffer */
-} luaL_Buffer;
-
-
-#define luaL_addchar(B,c) \
-  ((void)((B)->n < (B)->size || luaL_prepbuffsize((B), 1)), \
-   ((B)->b[(B)->n++] = (c)))
-
-#define luaL_addsize(B,s)	((B)->n += (s))
-
-LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
-LUALIB_API char *(luaL_prepbuffsize) (luaL_Buffer *B, size_t sz);
-LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
-LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s);
-LUALIB_API void (luaL_addvalue) (luaL_Buffer *B);
-LUALIB_API void (luaL_pushresult) (luaL_Buffer *B);
-LUALIB_API void (luaL_pushresultsize) (luaL_Buffer *B, size_t sz);
-LUALIB_API char *(luaL_buffinitsize) (lua_State *L, luaL_Buffer *B, size_t sz);
-
-#define luaL_prepbuffer(B)	luaL_prepbuffsize(B, LUAL_BUFFERSIZE)
-
-/* }====================================================== */
-
-
-
-/*
-** {======================================================
-** File handles for IO library
-** =======================================================
-*/
-
-/*
-** A file handle is a userdata with metatable 'LUA_FILEHANDLE' and
-** initial structure 'luaL_Stream' (it may contain other fields
-** after that initial structure).
-*/
-
-#define LUA_FILEHANDLE          "FILE*"
-
-
-typedef struct luaL_Stream {
-  FILE *f;  /* stream (NULL for incompletely created streams) */
-  lua_CFunction closef;  /* to close stream (NULL for closed streams) */
-} luaL_Stream;
-
-/* }====================================================== */
-
-
-
-/* compatibility with old module system */
-#if defined(LUA_COMPAT_MODULE)
-
-LUALIB_API void (luaL_pushmodule) (lua_State *L, const char *modname,
-                                   int sizehint);
-LUALIB_API void (luaL_openlib) (lua_State *L, const char *libname,
-                                const luaL_Reg *l, int nup);
-
-#define luaL_register(L,n,l)	(luaL_openlib(L,(n),(l),0))
-
-#endif
-
-
-/*
-** {==================================================================
-** "Abstraction Layer" for basic report of messages and errors
-** ===================================================================
-*/
-
-/* print a string */
-#if !defined(lua_writestring)
-#define lua_writestring(s,l)   fwrite((s), sizeof(char), (l), stdout)
-#endif
-
-/* print a newline and flush the output */
-#if !defined(lua_writeline)
-#define lua_writeline()        (lua_writestring("\n", 1), fflush(stdout))
-#endif
-
-/* print an error message */
-#if !defined(lua_writestringerror)
-#define lua_writestringerror(s,p) \
-        (fprintf(stderr, (s), (p)), fflush(stderr))
-#endif
-
-/* }================================================================== */
-
-
-/*
-** {============================================================
-** Compatibility with deprecated conversions
-** =============================================================
-*/
-#if defined(LUA_COMPAT_APIINTCASTS)
-
-#define luaL_checkunsigned(L,a)	((lua_Unsigned)luaL_checkinteger(L,a))
-#define luaL_optunsigned(L,a,d)	\
-	((lua_Unsigned)luaL_optinteger(L,a,(lua_Integer)(d)))
-
-#define luaL_checkint(L,n)	((int)luaL_checkinteger(L, (n)))
-#define luaL_optint(L,n,d)	((int)luaL_optinteger(L, (n), (d)))
-
-#define luaL_checklong(L,n)	((long)luaL_checkinteger(L, (n)))
-#define luaL_optlong(L,n,d)	((long)luaL_optinteger(L, (n), (d)))
-
-#endif
-/* }============================================================ */
-
-
-
-#endif
-
-
diff --git a/src/lib/lualib/lbaselib.c b/src/lib/lualib/lbaselib.c
deleted file mode 100644
index d481c4e..0000000
--- a/src/lib/lualib/lbaselib.c
+++ /dev/null
@@ -1,498 +0,0 @@
-/*
-** $Id: lbaselib.c,v 1.313 2016/04/11 19:18:40 roberto Exp $
-** Basic library
-** See Copyright Notice in lua.h
-*/
-
-#define lbaselib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <ctype.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-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;
-    size_t l;
-    lua_pushvalue(L, -1);  /* function to be called */
-    lua_pushvalue(L, i);   /* value to print */
-    lua_call(L, 1, 1);
-    s = lua_tolstring(L, -1, &l);  /* get result */
-    if (s == NULL)
-      return luaL_error(L, "'tostring' must return a string to 'print'");
-    if (i>1) lua_writestring("\t", 1);
-    lua_writestring(s, l);
-    lua_pop(L, 1);  /* pop result */
-  }
-  lua_writeline();
-  return 0;
-}
-
-
-#define SPACECHARS	" \f\n\r\t\v"
-
-static const char *b_str2int (const char *s, int base, lua_Integer *pn) {
-  lua_Unsigned n = 0;
-  int neg = 0;
-  s += strspn(s, SPACECHARS);  /* skip initial spaces */
-  if (*s == '-') { s++; neg = 1; }  /* handle signal */
-  else if (*s == '+') s++;
-  if (!isalnum((unsigned char)*s))  /* no digit? */
-    return NULL;
-  do {
-    int digit = (isdigit((unsigned char)*s)) ? *s - '0'
-                   : (toupper((unsigned char)*s) - 'A') + 10;
-    if (digit >= base) return NULL;  /* invalid numeral */
-    n = n * base + digit;
-    s++;
-  } while (isalnum((unsigned char)*s));
-  s += strspn(s, SPACECHARS);  /* skip trailing spaces */
-  *pn = (lua_Integer)((neg) ? (0u - n) : n);
-  return s;
-}
-
-
-static int luaB_tonumber (lua_State *L) {
-  if (lua_isnoneornil(L, 2)) {  /* standard conversion? */
-    luaL_checkany(L, 1);
-    if (lua_type(L, 1) == LUA_TNUMBER) {  /* already a number? */
-      lua_settop(L, 1);  /* yes; return it */
-      return 1;
-    }
-    else {
-      size_t l;
-      const char *s = lua_tolstring(L, 1, &l);
-      if (s != NULL && lua_stringtonumber(L, s) == l + 1)
-        return 1;  /* successful conversion to number */
-      /* else not a number */
-    }
-  }
-  else {
-    size_t l;
-    const char *s;
-    lua_Integer n = 0;  /* to avoid warnings */
-    lua_Integer base = luaL_checkinteger(L, 2);
-    luaL_checktype(L, 1, LUA_TSTRING);  /* no numbers as strings */
-    s = lua_tolstring(L, 1, &l);
-    luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
-    if (b_str2int(s, (int)base, &n) == s + l) {
-      lua_pushinteger(L, n);
-      return 1;
-    }  /* else not a number */
-  }  /* else not a number */
-  lua_pushnil(L);  /* not a number */
-  return 1;
-}
-
-
-static int luaB_error (lua_State *L) {
-  int level = (int)luaL_optinteger(L, 2, 1);
-  lua_settop(L, 1);
-  if (lua_type(L, 1) == LUA_TSTRING && level > 0) {
-    luaL_where(L, level);   /* add extra information */
-    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, 2,
-                    "nil or table expected");
-  if (luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL)
-    return luaL_error(L, "cannot change a protected metatable");
-  lua_settop(L, 2);
-  lua_setmetatable(L, 1);
-  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_rawlen (lua_State *L) {
-  int t = lua_type(L, 1);
-  luaL_argcheck(L, t == LUA_TTABLE || t == LUA_TSTRING, 1,
-                   "table or string expected");
-  lua_pushinteger(L, lua_rawlen(L, 1));
-  return 1;
-}
-
-
-static int luaB_rawget (lua_State *L) {
-  luaL_checktype(L, 1, LUA_TTABLE);
-  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_collectgarbage (lua_State *L) {
-  static const char *const opts[] = {"stop", "restart", "collect",
-    "count", "step", "setpause", "setstepmul",
-    "isrunning", NULL};
-  static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
-    LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL,
-    LUA_GCISRUNNING};
-  int o = optsnum[luaL_checkoption(L, 1, "collect", opts)];
-  int ex = (int)luaL_optinteger(L, 2, 0);
-  int res = lua_gc(L, o, ex);
-  switch (o) {
-    case LUA_GCCOUNT: {
-      int b = lua_gc(L, LUA_GCCOUNTB, 0);
-      lua_pushnumber(L, (lua_Number)res + ((lua_Number)b/1024));
-      return 1;
-    }
-    case LUA_GCSTEP: case LUA_GCISRUNNING: {
-      lua_pushboolean(L, res);
-      return 1;
-    }
-    default: {
-      lua_pushinteger(L, res);
-      return 1;
-    }
-  }
-}
-
-
-static int luaB_type (lua_State *L) {
-  int t = lua_type(L, 1);
-  luaL_argcheck(L, t != LUA_TNONE, 1, "value expected");
-  lua_pushstring(L, lua_typename(L, t));
-  return 1;
-}
-
-
-static int pairsmeta (lua_State *L, const char *method, int iszero,
-                      lua_CFunction iter) {
-  if (luaL_getmetafield(L, 1, method) == LUA_TNIL) {  /* no metamethod? */
-    luaL_checktype(L, 1, LUA_TTABLE);  /* argument must be a table */
-    lua_pushcfunction(L, iter);  /* will return generator, */
-    lua_pushvalue(L, 1);  /* state, */
-    if (iszero) lua_pushinteger(L, 0);  /* and initial value */
-    else lua_pushnil(L);
-  }
-  else {
-    lua_pushvalue(L, 1);  /* argument 'self' to metamethod */
-    lua_call(L, 1, 3);  /* get 3 values from metamethod */
-  }
-  return 3;
-}
-
-
-static int luaB_next (lua_State *L) {
-  luaL_checktype(L, 1, LUA_TTABLE);
-  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) {
-  return pairsmeta(L, "__pairs", 0, luaB_next);
-}
-
-
-/*
-** Traversal function for 'ipairs'
-*/
-static int ipairsaux (lua_State *L) {
-  lua_Integer i = luaL_checkinteger(L, 2) + 1;
-  lua_pushinteger(L, i);
-  return (lua_geti(L, 1, i) == LUA_TNIL) ? 1 : 2;
-}
-
-
-/*
-** 'ipairs' function. Returns 'ipairsaux', given "table", 0.
-** (The given "table" may not be a table.)
-*/
-static int luaB_ipairs (lua_State *L) {
-#if defined(LUA_COMPAT_IPAIRS)
-  return pairsmeta(L, "__ipairs", 1, ipairsaux);
-#else
-  luaL_checkany(L, 1);
-  lua_pushcfunction(L, ipairsaux);  /* iteration function */
-  lua_pushvalue(L, 1);  /* state */
-  lua_pushinteger(L, 0);  /* initial value */
-  return 3;
-#endif
-}
-
-
-static int load_aux (lua_State *L, int status, int envidx) {
-  if (status == LUA_OK) {
-    if (envidx != 0) {  /* 'env' parameter? */
-      lua_pushvalue(L, envidx);  /* environment for loaded function */
-      if (!lua_setupvalue(L, -2, 1))  /* set it as 1st upvalue */
-        lua_pop(L, 1);  /* remove 'env' if not used by previous call */
-    }
-    return 1;
-  }
-  else {  /* error (message is on top of the stack) */
-    lua_pushnil(L);
-    lua_insert(L, -2);  /* put before error message */
-    return 2;  /* return nil plus error message */
-  }
-}
-
-
-static int luaB_loadfile (lua_State *L) {
-  const char *fname = luaL_optstring(L, 1, NULL);
-  const char *mode = luaL_optstring(L, 2, NULL);
-  int env = (!lua_isnone(L, 3) ? 3 : 0);  /* 'env' index or 0 if no 'env' */
-  int status = luaL_loadfilex(L, fname, mode);
-  return load_aux(L, status, env);
-}
-
-
-/*
-** {======================================================
-** Generic Read function
-** =======================================================
-*/
-
-
-/*
-** reserved slot, above all arguments, to hold a copy of the returned
-** string to avoid it being collected while parsed. 'load' has four
-** optional arguments (chunk, source name, mode, and environment).
-*/
-#define RESERVEDSLOT	5
-
-
-/*
-** 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);  /* not used */
-  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)) {
-    lua_pop(L, 1);  /* pop result */
-    *size = 0;
-    return NULL;
-  }
-  else if (!lua_isstring(L, -1))
-    luaL_error(L, "reader function must return a string");
-  lua_replace(L, RESERVEDSLOT);  /* save string in reserved slot */
-  return lua_tolstring(L, RESERVEDSLOT, size);
-}
-
-
-static int luaB_load (lua_State *L) {
-  int status;
-  size_t l;
-  const char *s = lua_tolstring(L, 1, &l);
-  const char *mode = luaL_optstring(L, 3, "bt");
-  int env = (!lua_isnone(L, 4) ? 4 : 0);  /* 'env' index or 0 if no 'env' */
-  if (s != NULL) {  /* loading a string? */
-    const char *chunkname = luaL_optstring(L, 2, s);
-    status = luaL_loadbufferx(L, s, l, chunkname, mode);
-  }
-  else {  /* loading from a reader function */
-    const char *chunkname = luaL_optstring(L, 2, "=(load)");
-    luaL_checktype(L, 1, LUA_TFUNCTION);
-    lua_settop(L, RESERVEDSLOT);  /* create reserved slot */
-    status = lua_load(L, generic_reader, NULL, chunkname, mode);
-  }
-  return load_aux(L, status, env);
-}
-
-/* }====================================================== */
-
-
-static int dofilecont (lua_State *L, int d1, lua_KContext d2) {
-  (void)d1;  (void)d2;  /* only to match 'lua_Kfunction' prototype */
-  return lua_gettop(L) - 1;
-}
-
-
-static int luaB_dofile (lua_State *L) {
-  const char *fname = luaL_optstring(L, 1, NULL);
-  lua_settop(L, 1);
-  if (luaL_loadfile(L, fname) != LUA_OK)
-    return lua_error(L);
-  lua_callk(L, 0, LUA_MULTRET, 0, dofilecont);
-  return dofilecont(L, 0, 0);
-}
-
-
-static int luaB_assert (lua_State *L) {
-  if (lua_toboolean(L, 1))  /* condition is true? */
-    return lua_gettop(L);  /* return all arguments */
-  else {  /* error */
-    luaL_checkany(L, 1);  /* there must be a condition */
-    lua_remove(L, 1);  /* remove it */
-    lua_pushliteral(L, "assertion failed!");  /* default message */
-    lua_settop(L, 1);  /* leave only message (default if no other one) */
-    return luaB_error(L);  /* call 'error' */
-  }
-}
-
-
-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 {
-    lua_Integer i = luaL_checkinteger(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 - (int)i;
-  }
-}
-
-
-/*
-** Continuation function for 'pcall' and 'xpcall'. Both functions
-** already pushed a 'true' before doing the call, so in case of success
-** 'finishpcall' only has to return everything in the stack minus
-** 'extra' values (where 'extra' is exactly the number of items to be
-** ignored).
-*/
-static int finishpcall (lua_State *L, int status, lua_KContext extra) {
-  if (status != LUA_OK && status != LUA_YIELD) {  /* error? */
-    lua_pushboolean(L, 0);  /* first result (false) */
-    lua_pushvalue(L, -2);  /* error message */
-    return 2;  /* return false, msg */
-  }
-  else
-    return lua_gettop(L) - (int)extra;  /* return all results */
-}
-
-
-static int luaB_pcall (lua_State *L) {
-  int status;
-  luaL_checkany(L, 1);
-  lua_pushboolean(L, 1);  /* first result if no errors */
-  lua_insert(L, 1);  /* put it in place */
-  status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, finishpcall);
-  return finishpcall(L, status, 0);
-}
-
-
-/*
-** Do a protected call with error handling. After 'lua_rotate', the
-** stack will have <f, err, true, f, [args...]>; so, the function passes
-** 2 to 'finishpcall' to skip the 2 first values when returning results.
-*/
-static int luaB_xpcall (lua_State *L) {
-  int status;
-  int n = lua_gettop(L);
-  luaL_checktype(L, 2, LUA_TFUNCTION);  /* check error function */
-  lua_pushboolean(L, 1);  /* first result */
-  lua_pushvalue(L, 1);  /* function */
-  lua_rotate(L, 3, 2);  /* move them below function's arguments */
-  status = lua_pcallk(L, n - 2, LUA_MULTRET, 2, 2, finishpcall);
-  return finishpcall(L, status, 2);
-}
-
-
-static int luaB_tostring (lua_State *L) {
-  luaL_checkany(L, 1);
-  luaL_tolstring(L, 1, NULL);
-  return 1;
-}
-
-
-static const luaL_Reg base_funcs[] = {
-  {"assert", luaB_assert},
-  {"collectgarbage", luaB_collectgarbage},
-  {"dofile", luaB_dofile},
-  {"error", luaB_error},
-  {"getmetatable", luaB_getmetatable},
-  {"ipairs", luaB_ipairs},
-  {"loadfile", luaB_loadfile},
-  {"load", luaB_load},
-#if defined(LUA_COMPAT_LOADSTRING)
-  {"loadstring", luaB_load},
-#endif
-  {"next", luaB_next},
-  {"pairs", luaB_pairs},
-  {"pcall", luaB_pcall},
-  {"print", luaB_print},
-  {"rawequal", luaB_rawequal},
-  {"rawlen", luaB_rawlen},
-  {"rawget", luaB_rawget},
-  {"rawset", luaB_rawset},
-  {"select", luaB_select},
-  {"setmetatable", luaB_setmetatable},
-  {"tonumber", luaB_tonumber},
-  {"tostring", luaB_tostring},
-  {"type", luaB_type},
-  {"xpcall", luaB_xpcall},
-  /* placeholders */
-  {"_G", NULL},
-  {"_VERSION", NULL},
-  {NULL, NULL}
-};
-
-
-LUAMOD_API int luaopen_base (lua_State *L) {
-  /* open lib into global table */
-  lua_pushglobaltable(L);
-  luaL_setfuncs(L, base_funcs, 0);
-  /* set global _G */
-  lua_pushvalue(L, -1);
-  lua_setfield(L, -2, "_G");
-  /* set global _VERSION */
-  lua_pushliteral(L, LUA_VERSION);
-  lua_setfield(L, -2, "_VERSION");
-  return 1;
-}
-
diff --git a/src/lib/lualib/lbitlib.c b/src/lib/lualib/lbitlib.c
deleted file mode 100644
index 1cb1d5b..0000000
--- a/src/lib/lualib/lbitlib.c
+++ /dev/null
@@ -1,233 +0,0 @@
-/*
-** $Id: lbitlib.c,v 1.30 2015/11/11 19:08:09 roberto Exp $
-** Standard library for bitwise operations
-** See Copyright Notice in lua.h
-*/
-
-#define lbitlib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-#if defined(LUA_COMPAT_BITLIB)		/* { */
-
-
-#define pushunsigned(L,n)	lua_pushinteger(L, (lua_Integer)(n))
-#define checkunsigned(L,i)	((lua_Unsigned)luaL_checkinteger(L,i))
-
-
-/* number of bits to consider in a number */
-#if !defined(LUA_NBITS)
-#define LUA_NBITS	32
-#endif
-
-
-/*
-** a lua_Unsigned with its first LUA_NBITS bits equal to 1. (Shift must
-** be made in two parts to avoid problems when LUA_NBITS is equal to the
-** number of bits in a lua_Unsigned.)
-*/
-#define ALLONES		(~(((~(lua_Unsigned)0) << (LUA_NBITS - 1)) << 1))
-
-
-/* macro to trim extra bits */
-#define trim(x)		((x) & ALLONES)
-
-
-/* builds a number with 'n' ones (1 <= n <= LUA_NBITS) */
-#define mask(n)		(~((ALLONES << 1) << ((n) - 1)))
-
-
-
-static lua_Unsigned andaux (lua_State *L) {
-  int i, n = lua_gettop(L);
-  lua_Unsigned r = ~(lua_Unsigned)0;
-  for (i = 1; i <= n; i++)
-    r &= checkunsigned(L, i);
-  return trim(r);
-}
-
-
-static int b_and (lua_State *L) {
-  lua_Unsigned r = andaux(L);
-  pushunsigned(L, r);
-  return 1;
-}
-
-
-static int b_test (lua_State *L) {
-  lua_Unsigned r = andaux(L);
-  lua_pushboolean(L, r != 0);
-  return 1;
-}
-
-
-static int b_or (lua_State *L) {
-  int i, n = lua_gettop(L);
-  lua_Unsigned r = 0;
-  for (i = 1; i <= n; i++)
-    r |= checkunsigned(L, i);
-  pushunsigned(L, trim(r));
-  return 1;
-}
-
-
-static int b_xor (lua_State *L) {
-  int i, n = lua_gettop(L);
-  lua_Unsigned r = 0;
-  for (i = 1; i <= n; i++)
-    r ^= checkunsigned(L, i);
-  pushunsigned(L, trim(r));
-  return 1;
-}
-
-
-static int b_not (lua_State *L) {
-  lua_Unsigned r = ~checkunsigned(L, 1);
-  pushunsigned(L, trim(r));
-  return 1;
-}
-
-
-static int b_shift (lua_State *L, lua_Unsigned r, lua_Integer i) {
-  if (i < 0) {  /* shift right? */
-    i = -i;
-    r = trim(r);
-    if (i >= LUA_NBITS) r = 0;
-    else r >>= i;
-  }
-  else {  /* shift left */
-    if (i >= LUA_NBITS) r = 0;
-    else r <<= i;
-    r = trim(r);
-  }
-  pushunsigned(L, r);
-  return 1;
-}
-
-
-static int b_lshift (lua_State *L) {
-  return b_shift(L, checkunsigned(L, 1), luaL_checkinteger(L, 2));
-}
-
-
-static int b_rshift (lua_State *L) {
-  return b_shift(L, checkunsigned(L, 1), -luaL_checkinteger(L, 2));
-}
-
-
-static int b_arshift (lua_State *L) {
-  lua_Unsigned r = checkunsigned(L, 1);
-  lua_Integer i = luaL_checkinteger(L, 2);
-  if (i < 0 || !(r & ((lua_Unsigned)1 << (LUA_NBITS - 1))))
-    return b_shift(L, r, -i);
-  else {  /* arithmetic shift for 'negative' number */
-    if (i >= LUA_NBITS) r = ALLONES;
-    else
-      r = trim((r >> i) | ~(trim(~(lua_Unsigned)0) >> i));  /* add signal bit */
-    pushunsigned(L, r);
-    return 1;
-  }
-}
-
-
-static int b_rot (lua_State *L, lua_Integer d) {
-  lua_Unsigned r = checkunsigned(L, 1);
-  int i = d & (LUA_NBITS - 1);  /* i = d % NBITS */
-  r = trim(r);
-  if (i != 0)  /* avoid undefined shift of LUA_NBITS when i == 0 */
-    r = (r << i) | (r >> (LUA_NBITS - i));
-  pushunsigned(L, trim(r));
-  return 1;
-}
-
-
-static int b_lrot (lua_State *L) {
-  return b_rot(L, luaL_checkinteger(L, 2));
-}
-
-
-static int b_rrot (lua_State *L) {
-  return b_rot(L, -luaL_checkinteger(L, 2));
-}
-
-
-/*
-** get field and width arguments for field-manipulation functions,
-** checking whether they are valid.
-** ('luaL_error' called without 'return' to avoid later warnings about
-** 'width' being used uninitialized.)
-*/
-static int fieldargs (lua_State *L, int farg, int *width) {
-  lua_Integer f = luaL_checkinteger(L, farg);
-  lua_Integer w = luaL_optinteger(L, farg + 1, 1);
-  luaL_argcheck(L, 0 <= f, farg, "field cannot be negative");
-  luaL_argcheck(L, 0 < w, farg + 1, "width must be positive");
-  if (f + w > LUA_NBITS)
-    luaL_error(L, "trying to access non-existent bits");
-  *width = (int)w;
-  return (int)f;
-}
-
-
-static int b_extract (lua_State *L) {
-  int w;
-  lua_Unsigned r = trim(checkunsigned(L, 1));
-  int f = fieldargs(L, 2, &w);
-  r = (r >> f) & mask(w);
-  pushunsigned(L, r);
-  return 1;
-}
-
-
-static int b_replace (lua_State *L) {
-  int w;
-  lua_Unsigned r = trim(checkunsigned(L, 1));
-  lua_Unsigned v = trim(checkunsigned(L, 2));
-  int f = fieldargs(L, 3, &w);
-  lua_Unsigned m = mask(w);
-  r = (r & ~(m << f)) | ((v & m) << f);
-  pushunsigned(L, r);
-  return 1;
-}
-
-
-static const luaL_Reg bitlib[] = {
-  {"arshift", b_arshift},
-  {"band", b_and},
-  {"bnot", b_not},
-  {"bor", b_or},
-  {"bxor", b_xor},
-  {"btest", b_test},
-  {"extract", b_extract},
-  {"lrotate", b_lrot},
-  {"lshift", b_lshift},
-  {"replace", b_replace},
-  {"rrotate", b_rrot},
-  {"rshift", b_rshift},
-  {NULL, NULL}
-};
-
-
-
-LUAMOD_API int luaopen_bit32 (lua_State *L) {
-  luaL_newlib(L, bitlib);
-  return 1;
-}
-
-
-#else					/* }{ */
-
-
-LUAMOD_API int luaopen_bit32 (lua_State *L) {
-  return luaL_error(L, "library 'bit32' has been deprecated");
-}
-
-#endif					/* } */
diff --git a/src/lib/lualib/lcorolib.c b/src/lib/lualib/lcorolib.c
deleted file mode 100644
index 2303429..0000000
--- a/src/lib/lualib/lcorolib.c
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
-** $Id: lcorolib.c,v 1.10 2016/04/11 19:19:55 roberto Exp $
-** Coroutine Library
-** See Copyright Notice in lua.h
-*/
-
-#define lcorolib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <stdlib.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-static lua_State *getco (lua_State *L) {
-  lua_State *co = lua_tothread(L, 1);
-  luaL_argcheck(L, co, 1, "thread expected");
-  return co;
-}
-
-
-static int auxresume (lua_State *L, lua_State *co, int narg) {
-  int status;
-  if (!lua_checkstack(co, narg)) {
-    lua_pushliteral(L, "too many arguments to resume");
-    return -1;  /* error flag */
-  }
-  if (lua_status(co) == LUA_OK && lua_gettop(co) == 0) {
-    lua_pushliteral(L, "cannot resume dead coroutine");
-    return -1;  /* error flag */
-  }
-  lua_xmove(L, co, narg);
-  status = lua_resume(co, L, narg);
-  if (status == LUA_OK || status == LUA_YIELD) {
-    int nres = lua_gettop(co);
-    if (!lua_checkstack(L, nres + 1)) {
-      lua_pop(co, nres);  /* remove results anyway */
-      lua_pushliteral(L, "too many results to resume");
-      return -1;  /* error flag */
-    }
-    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 = getco(L);
-  int r;
-  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_type(L, -1) == LUA_TSTRING) {  /* error object is a string? */
-      luaL_where(L, 1);  /* add extra info */
-      lua_insert(L, -2);
-      lua_concat(L, 2);
-    }
-    return lua_error(L);  /* propagate error */
-  }
-  return r;
-}
-
-
-static int luaB_cocreate (lua_State *L) {
-  lua_State *NL;
-  luaL_checktype(L, 1, LUA_TFUNCTION);
-  NL = lua_newthread(L);
-  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_costatus (lua_State *L) {
-  lua_State *co = getco(L);
-  if (L == co) lua_pushliteral(L, "running");
-  else {
-    switch (lua_status(co)) {
-      case LUA_YIELD:
-        lua_pushliteral(L, "suspended");
-        break;
-      case LUA_OK: {
-        lua_Debug ar;
-        if (lua_getstack(co, 0, &ar) > 0)  /* does it have frames? */
-          lua_pushliteral(L, "normal");  /* it is running */
-        else if (lua_gettop(co) == 0)
-            lua_pushliteral(L, "dead");
-        else
-          lua_pushliteral(L, "suspended");  /* initial state */
-        break;
-      }
-      default:  /* some error occurred */
-        lua_pushliteral(L, "dead");
-        break;
-    }
-  }
-  return 1;
-}
-
-
-static int luaB_yieldable (lua_State *L) {
-  lua_pushboolean(L, lua_isyieldable(L));
-  return 1;
-}
-
-
-static int luaB_corunning (lua_State *L) {
-  int ismain = lua_pushthread(L);
-  lua_pushboolean(L, ismain);
-  return 2;
-}
-
-
-static const luaL_Reg co_funcs[] = {
-  {"create", luaB_cocreate},
-  {"resume", luaB_coresume},
-  {"running", luaB_corunning},
-  {"status", luaB_costatus},
-  {"wrap", luaB_cowrap},
-  {"yield", luaB_yield},
-  {"isyieldable", luaB_yieldable},
-  {NULL, NULL}
-};
-
-
-
-LUAMOD_API int luaopen_coroutine (lua_State *L) {
-  luaL_newlib(L, co_funcs);
-  return 1;
-}
-
diff --git a/src/lib/lualib/ldblib.c b/src/lib/lualib/ldblib.c
deleted file mode 100644
index 786f6cd..0000000
--- a/src/lib/lualib/ldblib.c
+++ /dev/null
@@ -1,456 +0,0 @@
-/*
-** $Id: ldblib.c,v 1.151 2015/11/23 11:29:43 roberto Exp $
-** Interface from Lua to its debug API
-** See Copyright Notice in lua.h
-*/
-
-#define ldblib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-/*
-** The hook table at registry[&HOOKKEY] maps threads to their current
-** hook function. (We only need the unique address of 'HOOKKEY'.)
-*/
-static const int HOOKKEY = 0;
-
-
-/*
-** If L1 != L, L1 can be in any state, and therefore there are no
-** guarantees about its stack space; any push in L1 must be
-** checked.
-*/
-static void checkstack (lua_State *L, lua_State *L1, int n) {
-  if (L != L1 && !lua_checkstack(L1, n))
-    luaL_error(L, "stack overflow");
-}
-
-
-static int db_getregistry (lua_State *L) {
-  lua_pushvalue(L, LUA_REGISTRYINDEX);
-  return 1;
-}
-
-
-static int db_getmetatable (lua_State *L) {
-  luaL_checkany(L, 1);
-  if (!lua_getmetatable(L, 1)) {
-    lua_pushnil(L);  /* no metatable */
-  }
-  return 1;
-}
-
-
-static int db_setmetatable (lua_State *L) {
-  int t = lua_type(L, 2);
-  luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
-                    "nil or table expected");
-  lua_settop(L, 2);
-  lua_setmetatable(L, 1);
-  return 1;  /* return 1st argument */
-}
-
-
-static int db_getuservalue (lua_State *L) {
-  if (lua_type(L, 1) != LUA_TUSERDATA)
-    lua_pushnil(L);
-  else
-    lua_getuservalue(L, 1);
-  return 1;
-}
-
-
-static int db_setuservalue (lua_State *L) {
-  luaL_checktype(L, 1, LUA_TUSERDATA);
-  luaL_checkany(L, 2);
-  lua_settop(L, 2);
-  lua_setuservalue(L, 1);
-  return 1;
-}
-
-
-/*
-** Auxiliary function used by several library functions: check for
-** an optional thread as function's first argument and set 'arg' with
-** 1 if this argument is present (so that functions can skip it to
-** access their other arguments)
-*/
-static lua_State *getthread (lua_State *L, int *arg) {
-  if (lua_isthread(L, 1)) {
-    *arg = 1;
-    return lua_tothread(L, 1);
-  }
-  else {
-    *arg = 0;
-    return L;  /* function will operate over current thread */
-  }
-}
-
-
-/*
-** Variations of 'lua_settable', used by 'db_getinfo' to put results
-** from 'lua_getinfo' into result table. Key is always a string;
-** value can be a string, an int, or a boolean.
-*/
-static void settabss (lua_State *L, const char *k, const char *v) {
-  lua_pushstring(L, v);
-  lua_setfield(L, -2, k);
-}
-
-static void settabsi (lua_State *L, const char *k, int v) {
-  lua_pushinteger(L, v);
-  lua_setfield(L, -2, k);
-}
-
-static void settabsb (lua_State *L, const char *k, int v) {
-  lua_pushboolean(L, v);
-  lua_setfield(L, -2, k);
-}
-
-
-/*
-** In function 'db_getinfo', the call to 'lua_getinfo' may push
-** results on the stack; later it creates the result table to put
-** these objects. Function 'treatstackoption' puts the result from
-** 'lua_getinfo' on top of the result table so that it can call
-** 'lua_setfield'.
-*/
-static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) {
-  if (L == L1)
-    lua_rotate(L, -2, 1);  /* exchange object and table */
-  else
-    lua_xmove(L1, L, 1);  /* move object to the "main" stack */
-  lua_setfield(L, -2, fname);  /* put object into table */
-}
-
-
-/*
-** Calls 'lua_getinfo' and collects all results in a new table.
-** L1 needs stack space for an optional input (function) plus
-** two optional outputs (function and line table) from function
-** 'lua_getinfo'.
-*/
-static int db_getinfo (lua_State *L) {
-  lua_Debug ar;
-  int arg;
-  lua_State *L1 = getthread(L, &arg);
-  const char *options = luaL_optstring(L, arg+2, "flnStu");
-  checkstack(L, L1, 3);
-  if (lua_isfunction(L, arg + 1)) {  /* info about a function? */
-    options = lua_pushfstring(L, ">%s", options);  /* add '>' to 'options' */
-    lua_pushvalue(L, arg + 1);  /* move function to 'L1' stack */
-    lua_xmove(L, L1, 1);
-  }
-  else {  /* stack level */
-    if (!lua_getstack(L1, (int)luaL_checkinteger(L, arg + 1), &ar)) {
-      lua_pushnil(L);  /* level out of range */
-      return 1;
-    }
-  }
-  if (!lua_getinfo(L1, options, &ar))
-    return luaL_argerror(L, arg+2, "invalid option");
-  lua_newtable(L);  /* table to collect results */
-  if (strchr(options, 'S')) {
-    settabss(L, "source", ar.source);
-    settabss(L, "short_src", ar.short_src);
-    settabsi(L, "linedefined", ar.linedefined);
-    settabsi(L, "lastlinedefined", ar.lastlinedefined);
-    settabss(L, "what", ar.what);
-  }
-  if (strchr(options, 'l'))
-    settabsi(L, "currentline", ar.currentline);
-  if (strchr(options, 'u')) {
-    settabsi(L, "nups", ar.nups);
-    settabsi(L, "nparams", ar.nparams);
-    settabsb(L, "isvararg", ar.isvararg);
-  }
-  if (strchr(options, 'n')) {
-    settabss(L, "name", ar.name);
-    settabss(L, "namewhat", ar.namewhat);
-  }
-  if (strchr(options, 't'))
-    settabsb(L, "istailcall", ar.istailcall);
-  if (strchr(options, 'L'))
-    treatstackoption(L, L1, "activelines");
-  if (strchr(options, 'f'))
-    treatstackoption(L, L1, "func");
-  return 1;  /* return table */
-}
-
-
-static int db_getlocal (lua_State *L) {
-  int arg;
-  lua_State *L1 = getthread(L, &arg);
-  lua_Debug ar;
-  const char *name;
-  int nvar = (int)luaL_checkinteger(L, arg + 2);  /* local-variable index */
-  if (lua_isfunction(L, arg + 1)) {  /* function argument? */
-    lua_pushvalue(L, arg + 1);  /* push function */
-    lua_pushstring(L, lua_getlocal(L, NULL, nvar));  /* push local name */
-    return 1;  /* return only name (there is no value) */
-  }
-  else {  /* stack-level argument */
-    int level = (int)luaL_checkinteger(L, arg + 1);
-    if (!lua_getstack(L1, level, &ar))  /* out of range? */
-      return luaL_argerror(L, arg+1, "level out of range");
-    checkstack(L, L1, 1);
-    name = lua_getlocal(L1, &ar, nvar);
-    if (name) {
-      lua_xmove(L1, L, 1);  /* move local value */
-      lua_pushstring(L, name);  /* push name */
-      lua_rotate(L, -2, 1);  /* re-order */
-      return 2;
-    }
-    else {
-      lua_pushnil(L);  /* no name (nor value) */
-      return 1;
-    }
-  }
-}
-
-
-static int db_setlocal (lua_State *L) {
-  int arg;
-  const char *name;
-  lua_State *L1 = getthread(L, &arg);
-  lua_Debug ar;
-  int level = (int)luaL_checkinteger(L, arg + 1);
-  int nvar = (int)luaL_checkinteger(L, arg + 2);
-  if (!lua_getstack(L1, level, &ar))  /* out of range? */
-    return luaL_argerror(L, arg+1, "level out of range");
-  luaL_checkany(L, arg+3);
-  lua_settop(L, arg+3);
-  checkstack(L, L1, 1);
-  lua_xmove(L, L1, 1);
-  name = lua_setlocal(L1, &ar, nvar);
-  if (name == NULL)
-    lua_pop(L1, 1);  /* pop value (if not popped by 'lua_setlocal') */
-  lua_pushstring(L, name);
-  return 1;
-}
-
-
-/*
-** get (if 'get' is true) or set an upvalue from a closure
-*/
-static int auxupvalue (lua_State *L, int get) {
-  const char *name;
-  int n = (int)luaL_checkinteger(L, 2);  /* upvalue index */
-  luaL_checktype(L, 1, LUA_TFUNCTION);  /* closure */
-  name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);
-  if (name == NULL) return 0;
-  lua_pushstring(L, name);
-  lua_insert(L, -(get+1));  /* no-op if get is false */
-  return get + 1;
-}
-
-
-static int db_getupvalue (lua_State *L) {
-  return auxupvalue(L, 1);
-}
-
-
-static int db_setupvalue (lua_State *L) {
-  luaL_checkany(L, 3);
-  return auxupvalue(L, 0);
-}
-
-
-/*
-** Check whether a given upvalue from a given closure exists and
-** returns its index
-*/
-static int checkupval (lua_State *L, int argf, int argnup) {
-  int nup = (int)luaL_checkinteger(L, argnup);  /* upvalue index */
-  luaL_checktype(L, argf, LUA_TFUNCTION);  /* closure */
-  luaL_argcheck(L, (lua_getupvalue(L, argf, nup) != NULL), argnup,
-                   "invalid upvalue index");
-  return nup;
-}
-
-
-static int db_upvalueid (lua_State *L) {
-  int n = checkupval(L, 1, 2);
-  lua_pushlightuserdata(L, lua_upvalueid(L, 1, n));
-  return 1;
-}
-
-
-static int db_upvaluejoin (lua_State *L) {
-  int n1 = checkupval(L, 1, 2);
-  int n2 = checkupval(L, 3, 4);
-  luaL_argcheck(L, !lua_iscfunction(L, 1), 1, "Lua function expected");
-  luaL_argcheck(L, !lua_iscfunction(L, 3), 3, "Lua function expected");
-  lua_upvaluejoin(L, 1, n1, 3, n2);
-  return 0;
-}
-
-
-/*
-** Call hook function registered at hook table for the current
-** thread (if there is one)
-*/
-static void hookf (lua_State *L, lua_Debug *ar) {
-  static const char *const hooknames[] =
-    {"call", "return", "line", "count", "tail call"};
-  lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY);
-  lua_pushthread(L);
-  if (lua_rawget(L, -2) == LUA_TFUNCTION) {  /* is there a hook function? */
-    lua_pushstring(L, hooknames[(int)ar->event]);  /* push event name */
-    if (ar->currentline >= 0)
-      lua_pushinteger(L, ar->currentline);  /* push current line */
-    else lua_pushnil(L);
-    lua_assert(lua_getinfo(L, "lS", ar));
-    lua_call(L, 2, 0);  /* call hook function */
-  }
-}
-
-
-/*
-** Convert a string mask (for 'sethook') into a bit mask
-*/
-static int makemask (const char *smask, int count) {
-  int mask = 0;
-  if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
-  if (strchr(smask, 'r')) mask |= LUA_MASKRET;
-  if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
-  if (count > 0) mask |= LUA_MASKCOUNT;
-  return mask;
-}
-
-
-/*
-** Convert a bit mask (for 'gethook') into a string mask
-*/
-static char *unmakemask (int mask, char *smask) {
-  int i = 0;
-  if (mask & LUA_MASKCALL) smask[i++] = 'c';
-  if (mask & LUA_MASKRET) smask[i++] = 'r';
-  if (mask & LUA_MASKLINE) smask[i++] = 'l';
-  smask[i] = '\0';
-  return smask;
-}
-
-
-static int db_sethook (lua_State *L) {
-  int arg, mask, count;
-  lua_Hook func;
-  lua_State *L1 = getthread(L, &arg);
-  if (lua_isnoneornil(L, arg+1)) {  /* no hook? */
-    lua_settop(L, arg+1);
-    func = NULL; mask = 0; count = 0;  /* turn off hooks */
-  }
-  else {
-    const char *smask = luaL_checkstring(L, arg+2);
-    luaL_checktype(L, arg+1, LUA_TFUNCTION);
-    count = (int)luaL_optinteger(L, arg + 3, 0);
-    func = hookf; mask = makemask(smask, count);
-  }
-  if (lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY) == LUA_TNIL) {
-    lua_createtable(L, 0, 2);  /* create a hook table */
-    lua_pushvalue(L, -1);
-    lua_rawsetp(L, LUA_REGISTRYINDEX, &HOOKKEY);  /* set it in position */
-    lua_pushstring(L, "k");
-    lua_setfield(L, -2, "__mode");  /** hooktable.__mode = "k" */
-    lua_pushvalue(L, -1);
-    lua_setmetatable(L, -2);  /* setmetatable(hooktable) = hooktable */
-  }
-  checkstack(L, L1, 1);
-  lua_pushthread(L1); lua_xmove(L1, L, 1);  /* key (thread) */
-  lua_pushvalue(L, arg + 1);  /* value (hook function) */
-  lua_rawset(L, -3);  /* hooktable[L1] = new Lua hook */
-  lua_sethook(L1, func, mask, count);
-  return 0;
-}
-
-
-static int db_gethook (lua_State *L) {
-  int arg;
-  lua_State *L1 = getthread(L, &arg);
-  char buff[5];
-  int mask = lua_gethookmask(L1);
-  lua_Hook hook = lua_gethook(L1);
-  if (hook == NULL)  /* no hook? */
-    lua_pushnil(L);
-  else if (hook != hookf)  /* external hook? */
-    lua_pushliteral(L, "external hook");
-  else {  /* hook table must exist */
-    lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY);
-    checkstack(L, L1, 1);
-    lua_pushthread(L1); lua_xmove(L1, L, 1);
-    lua_rawget(L, -2);   /* 1st result = hooktable[L1] */
-    lua_remove(L, -2);  /* remove hook table */
-  }
-  lua_pushstring(L, unmakemask(mask, buff));  /* 2nd result = mask */
-  lua_pushinteger(L, lua_gethookcount(L1));  /* 3rd result = count */
-  return 3;
-}
-
-
-static int db_debug (lua_State *L) {
-  for (;;) {
-    char buffer[250];
-    lua_writestringerror("%s", "lua_debug> ");
-    if (fgets(buffer, sizeof(buffer), stdin) == 0 ||
-        strcmp(buffer, "cont\n") == 0)
-      return 0;
-    if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") ||
-        lua_pcall(L, 0, 0, 0))
-      lua_writestringerror("%s\n", lua_tostring(L, -1));
-    lua_settop(L, 0);  /* remove eventual returns */
-  }
-}
-
-
-static int db_traceback (lua_State *L) {
-  int arg;
-  lua_State *L1 = getthread(L, &arg);
-  const char *msg = lua_tostring(L, arg + 1);
-  if (msg == NULL && !lua_isnoneornil(L, arg + 1))  /* non-string 'msg'? */
-    lua_pushvalue(L, arg + 1);  /* return it untouched */
-  else {
-    int level = (int)luaL_optinteger(L, arg + 2, (L == L1) ? 1 : 0);
-    luaL_traceback(L, L1, msg, level);
-  }
-  return 1;
-}
-
-
-static const luaL_Reg dblib[] = {
-  {"debug", db_debug},
-  {"getuservalue", db_getuservalue},
-  {"gethook", db_gethook},
-  {"getinfo", db_getinfo},
-  {"getlocal", db_getlocal},
-  {"getregistry", db_getregistry},
-  {"getmetatable", db_getmetatable},
-  {"getupvalue", db_getupvalue},
-  {"upvaluejoin", db_upvaluejoin},
-  {"upvalueid", db_upvalueid},
-  {"setuservalue", db_setuservalue},
-  {"sethook", db_sethook},
-  {"setlocal", db_setlocal},
-  {"setmetatable", db_setmetatable},
-  {"setupvalue", db_setupvalue},
-  {"traceback", db_traceback},
-  {NULL, NULL}
-};
-
-
-LUAMOD_API int luaopen_debug (lua_State *L) {
-  luaL_newlib(L, dblib);
-  return 1;
-}
-
diff --git a/src/lib/lualib/linit.c b/src/lib/lualib/linit.c
deleted file mode 100644
index 8ce94cc..0000000
--- a/src/lib/lualib/linit.c
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
-** $Id: linit.c,v 1.38 2015/01/05 13:48:33 roberto Exp $
-** Initialization of libraries for lua.c and other clients
-** See Copyright Notice in lua.h
-*/
-
-
-#define linit_c
-#define LUA_LIB
-
-/*
-** If you embed Lua in your program and need to open the standard
-** libraries, call luaL_openlibs in your program. If you need a
-** different set of libraries, copy this file to your project and edit
-** it to suit your needs.
-**
-** You can also *preload* libraries, so that a later 'require' can
-** open the library, which is already linked to the application.
-** For that, do the following code:
-**
-**  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
-**  lua_pushcfunction(L, luaopen_modname);
-**  lua_setfield(L, -2, modname);
-**  lua_pop(L, 1);  // remove _PRELOAD table
-*/
-
-#include "lprefix.h"
-
-
-#include <stddef.h>
-
-#include "lua.h"
-
-#include "lualib.h"
-#include "lauxlib.h"
-
-
-/*
-** these libs are loaded by lua.c and are readily available to any Lua
-** program
-*/
-static const luaL_Reg loadedlibs[] = {
-  {"_G", luaopen_base},
-  {LUA_LOADLIBNAME, luaopen_package},
-  {LUA_COLIBNAME, luaopen_coroutine},
-  {LUA_TABLIBNAME, luaopen_table},
-  {LUA_IOLIBNAME, luaopen_io},
-  {LUA_OSLIBNAME, luaopen_os},
-  {LUA_STRLIBNAME, luaopen_string},
-  {LUA_MATHLIBNAME, luaopen_math},
-  {LUA_UTF8LIBNAME, luaopen_utf8},
-  {LUA_DBLIBNAME, luaopen_debug},
-#if defined(LUA_COMPAT_BITLIB)
-  {LUA_BITLIBNAME, luaopen_bit32},
-#endif
-  {NULL, NULL}
-};
-
-
-LUALIB_API void luaL_openlibs (lua_State *L) {
-  const luaL_Reg *lib;
-  /* "require" functions from 'loadedlibs' and set results to global table */
-  for (lib = loadedlibs; lib->func; lib++) {
-    luaL_requiref(L, lib->name, lib->func, 1);
-    lua_pop(L, 1);  /* remove lib */
-  }
-}
-
diff --git a/src/lib/lualib/liolib.c b/src/lib/lualib/liolib.c
deleted file mode 100644
index aa78e59..0000000
--- a/src/lib/lualib/liolib.c
+++ /dev/null
@@ -1,768 +0,0 @@
-/*
-** $Id: liolib.c,v 2.149 2016/05/02 14:03:19 roberto Exp $
-** Standard I/O (and system) library
-** See Copyright Notice in lua.h
-*/
-
-#define liolib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <ctype.h>
-#include <errno.h>
-#include <locale.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-
-
-/*
-** Change this macro to accept other modes for 'fopen' besides
-** the standard ones.
-*/
-#if !defined(l_checkmode)
-
-/* accepted extensions to 'mode' in 'fopen' */
-#if !defined(L_MODEEXT)
-#define L_MODEEXT	"b"
-#endif
-
-/* Check whether 'mode' matches '[rwa]%+?[L_MODEEXT]*' */
-#define l_checkmode(mode) \
-	(*mode != '\0' && strchr("rwa", *(mode++)) != NULL &&	\
-	(*mode != '+' || (++mode, 1)) &&  /* skip if char is '+' */	\
-	(strspn(mode, L_MODEEXT) == strlen(mode)))
-
-#endif
-
-/*
-** {======================================================
-** l_popen spawns a new process connected to the current
-** one through the file streams.
-** =======================================================
-*/
-
-#if !defined(l_popen)		/* { */
-
-#if defined(LUA_USE_POSIX)	/* { */
-
-#define l_popen(L,c,m)		(fflush(NULL), popen(c,m))
-#define l_pclose(L,file)	(pclose(file))
-
-#elif defined(LUA_USE_WINDOWS)	/* }{ */
-
-#define l_popen(L,c,m)		(_popen(c,m))
-#define l_pclose(L,file)	(_pclose(file))
-
-#else				/* }{ */
-
-/* ISO C definitions */
-#define l_popen(L,c,m)  \
-	  ((void)((void)c, m), \
-	  luaL_error(L, "'popen' not supported"), \
-	  (FILE*)0)
-#define l_pclose(L,file)		((void)L, (void)file, -1)
-
-#endif				/* } */
-
-#endif				/* } */
-
-/* }====================================================== */
-
-
-#if !defined(l_getc)		/* { */
-
-#if defined(LUA_USE_POSIX)
-#define l_getc(f)		getc_unlocked(f)
-#define l_lockfile(f)		flockfile(f)
-#define l_unlockfile(f)		funlockfile(f)
-#else
-#define l_getc(f)		getc(f)
-#define l_lockfile(f)		((void)0)
-#define l_unlockfile(f)		((void)0)
-#endif
-
-#endif				/* } */
-
-
-/*
-** {======================================================
-** l_fseek: configuration for longer offsets
-** =======================================================
-*/
-
-#if !defined(l_fseek)		/* { */
-
-#if defined(LUA_USE_POSIX)	/* { */
-
-#include <sys/types.h>
-
-#define l_fseek(f,o,w)		fseeko(f,o,w)
-#define l_ftell(f)		ftello(f)
-#define l_seeknum		off_t
-
-#elif defined(LUA_USE_WINDOWS) && !defined(_CRTIMP_TYPEINFO) \
-   && defined(_MSC_VER) && (_MSC_VER >= 1400)	/* }{ */
-
-/* Windows (but not DDK) and Visual C++ 2005 or higher */
-#define l_fseek(f,o,w)		_fseeki64(f,o,w)
-#define l_ftell(f)		_ftelli64(f)
-#define l_seeknum		__int64
-
-#else				/* }{ */
-
-/* ISO C definitions */
-#define l_fseek(f,o,w)		fseek(f,o,w)
-#define l_ftell(f)		ftell(f)
-#define l_seeknum		long
-
-#endif				/* } */
-
-#endif				/* } */
-
-/* }====================================================== */
-
-
-#define IO_PREFIX	"_IO_"
-#define IOPREF_LEN	(sizeof(IO_PREFIX)/sizeof(char) - 1)
-#define IO_INPUT	(IO_PREFIX "input")
-#define IO_OUTPUT	(IO_PREFIX "output")
-
-
-typedef luaL_Stream LStream;
-
-
-#define tolstream(L)	((LStream *)luaL_checkudata(L, 1, LUA_FILEHANDLE))
-
-#define isclosed(p)	((p)->closef == NULL)
-
-
-static int io_type (lua_State *L) {
-  LStream *p;
-  luaL_checkany(L, 1);
-  p = (LStream *)luaL_testudata(L, 1, LUA_FILEHANDLE);
-  if (p == NULL)
-    lua_pushnil(L);  /* not a file */
-  else if (isclosed(p))
-    lua_pushliteral(L, "closed file");
-  else
-    lua_pushliteral(L, "file");
-  return 1;
-}
-
-
-static int f_tostring (lua_State *L) {
-  LStream *p = tolstream(L);
-  if (isclosed(p))
-    lua_pushliteral(L, "file (closed)");
-  else
-    lua_pushfstring(L, "file (%p)", p->f);
-  return 1;
-}
-
-
-static FILE *tofile (lua_State *L) {
-  LStream *p = tolstream(L);
-  if (isclosed(p))
-    luaL_error(L, "attempt to use a closed file");
-  lua_assert(p->f);
-  return p->f;
-}
-
-
-/*
-** When creating file handles, always creates a 'closed' file handle
-** before opening the actual file; so, if there is a memory error, the
-** handle is in a consistent state.
-*/
-static LStream *newprefile (lua_State *L) {
-  LStream *p = (LStream *)lua_newuserdata(L, sizeof(LStream));
-  p->closef = NULL;  /* mark file handle as 'closed' */
-  luaL_setmetatable(L, LUA_FILEHANDLE);
-  return p;
-}
-
-
-/*
-** Calls the 'close' function from a file handle. The 'volatile' avoids
-** a bug in some versions of the Clang compiler (e.g., clang 3.0 for
-** 32 bits).
-*/
-static int aux_close (lua_State *L) {
-  LStream *p = tolstream(L);
-  volatile lua_CFunction cf = p->closef;
-  p->closef = NULL;  /* mark stream as closed */
-  return (*cf)(L);  /* close it */
-}
-
-
-static int io_close (lua_State *L) {
-  if (lua_isnone(L, 1))  /* no argument? */
-    lua_getfield(L, LUA_REGISTRYINDEX, IO_OUTPUT);  /* use standard output */
-  tofile(L);  /* make sure argument is an open stream */
-  return aux_close(L);
-}
-
-
-static int f_gc (lua_State *L) {
-  LStream *p = tolstream(L);
-  if (!isclosed(p) && p->f != NULL)
-    aux_close(L);  /* ignore closed and incompletely open files */
-  return 0;
-}
-
-
-/*
-** function to close regular files
-*/
-static int io_fclose (lua_State *L) {
-  LStream *p = tolstream(L);
-  int res = fclose(p->f);
-  return luaL_fileresult(L, (res == 0), NULL);
-}
-
-
-static LStream *newfile (lua_State *L) {
-  LStream *p = newprefile(L);
-  p->f = NULL;
-  p->closef = &io_fclose;
-  return p;
-}
-
-
-static void opencheck (lua_State *L, const char *fname, const char *mode) {
-  LStream *p = newfile(L);
-  p->f = fopen(fname, mode);
-  if (p->f == NULL)
-    luaL_error(L, "cannot open file '%s' (%s)", fname, strerror(errno));
-}
-
-
-static int io_open (lua_State *L) {
-  const char *filename = luaL_checkstring(L, 1);
-  const char *mode = luaL_optstring(L, 2, "r");
-  LStream *p = newfile(L);
-  const char *md = mode;  /* to traverse/check mode */
-  luaL_argcheck(L, l_checkmode(md), 2, "invalid mode");
-  p->f = fopen(filename, mode);
-  return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
-}
-
-
-/*
-** function to close 'popen' files
-*/
-static int io_pclose (lua_State *L) {
-  LStream *p = tolstream(L);
-  return luaL_execresult(L, l_pclose(L, p->f));
-}
-
-
-static int io_popen (lua_State *L) {
-  const char *filename = luaL_checkstring(L, 1);
-  const char *mode = luaL_optstring(L, 2, "r");
-  LStream *p = newprefile(L);
-  p->f = l_popen(L, filename, mode);
-  p->closef = &io_pclose;
-  return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
-}
-
-
-static int io_tmpfile (lua_State *L) {
-  LStream *p = newfile(L);
-  p->f = tmpfile();
-  return (p->f == NULL) ? luaL_fileresult(L, 0, NULL) : 1;
-}
-
-
-static FILE *getiofile (lua_State *L, const char *findex) {
-  LStream *p;
-  lua_getfield(L, LUA_REGISTRYINDEX, findex);
-  p = (LStream *)lua_touserdata(L, -1);
-  if (isclosed(p))
-    luaL_error(L, "standard %s file is closed", findex + IOPREF_LEN);
-  return p->f;
-}
-
-
-static int g_iofile (lua_State *L, const char *f, const char *mode) {
-  if (!lua_isnoneornil(L, 1)) {
-    const char *filename = lua_tostring(L, 1);
-    if (filename)
-      opencheck(L, filename, mode);
-    else {
-      tofile(L);  /* check that it's a valid file handle */
-      lua_pushvalue(L, 1);
-    }
-    lua_setfield(L, LUA_REGISTRYINDEX, f);
-  }
-  /* return current value */
-  lua_getfield(L, LUA_REGISTRYINDEX, f);
-  return 1;
-}
-
-
-static int io_input (lua_State *L) {
-  return g_iofile(L, IO_INPUT, "r");
-}
-
-
-static int io_output (lua_State *L) {
-  return g_iofile(L, IO_OUTPUT, "w");
-}
-
-
-static int io_readline (lua_State *L);
-
-
-/*
-** maximum number of arguments to 'f:lines'/'io.lines' (it + 3 must fit
-** in the limit for upvalues of a closure)
-*/
-#define MAXARGLINE	250
-
-static void aux_lines (lua_State *L, int toclose) {
-  int n = lua_gettop(L) - 1;  /* number of arguments to read */
-  luaL_argcheck(L, n <= MAXARGLINE, MAXARGLINE + 2, "too many arguments");
-  lua_pushinteger(L, n);  /* number of arguments to read */
-  lua_pushboolean(L, toclose);  /* close/not close file when finished */
-  lua_rotate(L, 2, 2);  /* move 'n' and 'toclose' to their positions */
-  lua_pushcclosure(L, io_readline, 3 + n);
-}
-
-
-static int f_lines (lua_State *L) {
-  tofile(L);  /* check that it's a valid file handle */
-  aux_lines(L, 0);
-  return 1;
-}
-
-
-static int io_lines (lua_State *L) {
-  int toclose;
-  if (lua_isnone(L, 1)) lua_pushnil(L);  /* at least one argument */
-  if (lua_isnil(L, 1)) {  /* no file name? */
-    lua_getfield(L, LUA_REGISTRYINDEX, IO_INPUT);  /* get default input */
-    lua_replace(L, 1);  /* put it at index 1 */
-    tofile(L);  /* check that it's a valid file handle */
-    toclose = 0;  /* do not close it after iteration */
-  }
-  else {  /* open a new file */
-    const char *filename = luaL_checkstring(L, 1);
-    opencheck(L, filename, "r");
-    lua_replace(L, 1);  /* put file at index 1 */
-    toclose = 1;  /* close it after iteration */
-  }
-  aux_lines(L, toclose);
-  return 1;
-}
-
-
-/*
-** {======================================================
-** READ
-** =======================================================
-*/
-
-
-/* maximum length of a numeral */
-#if !defined (L_MAXLENNUM)
-#define L_MAXLENNUM     200
-#endif
-
-
-/* auxiliary structure used by 'read_number' */
-typedef struct {
-  FILE *f;  /* file being read */
-  int c;  /* current character (look ahead) */
-  int n;  /* number of elements in buffer 'buff' */
-  char buff[L_MAXLENNUM + 1];  /* +1 for ending '\0' */
-} RN;
-
-
-/*
-** Add current char to buffer (if not out of space) and read next one
-*/
-static int nextc (RN *rn) {
-  if (rn->n >= L_MAXLENNUM) {  /* buffer overflow? */
-    rn->buff[0] = '\0';  /* invalidate result */
-    return 0;  /* fail */
-  }
-  else {
-    rn->buff[rn->n++] = rn->c;  /* save current char */
-    rn->c = l_getc(rn->f);  /* read next one */
-    return 1;
-  }
-}
-
-
-/*
-** Accept current char if it is in 'set' (of size 2)
-*/
-static int test2 (RN *rn, const char *set) {
-  if (rn->c == set[0] || rn->c == set[1])
-    return nextc(rn);
-  else return 0;
-}
-
-
-/*
-** Read a sequence of (hex)digits
-*/
-static int readdigits (RN *rn, int hex) {
-  int count = 0;
-  while ((hex ? isxdigit(rn->c) : isdigit(rn->c)) && nextc(rn))
-    count++;
-  return count;
-}
-
-
-/*
-** Read a number: first reads a valid prefix of a numeral into a buffer.
-** Then it calls 'lua_stringtonumber' to check whether the format is
-** correct and to convert it to a Lua number
-*/
-static int read_number (lua_State *L, FILE *f) {
-  RN rn;
-  int count = 0;
-  int hex = 0;
-  char decp[2];
-  rn.f = f; rn.n = 0;
-  decp[0] = lua_getlocaledecpoint();  /* get decimal point from locale */
-  decp[1] = '.';  /* always accept a dot */
-  l_lockfile(rn.f);
-  do { rn.c = l_getc(rn.f); } while (isspace(rn.c));  /* skip spaces */
-  test2(&rn, "-+");  /* optional signal */
-  if (test2(&rn, "00")) {
-    if (test2(&rn, "xX")) hex = 1;  /* numeral is hexadecimal */
-    else count = 1;  /* count initial '0' as a valid digit */
-  }
-  count += readdigits(&rn, hex);  /* integral part */
-  if (test2(&rn, decp))  /* decimal point? */
-    count += readdigits(&rn, hex);  /* fractional part */
-  if (count > 0 && test2(&rn, (hex ? "pP" : "eE"))) {  /* exponent mark? */
-    test2(&rn, "-+");  /* exponent signal */
-    readdigits(&rn, 0);  /* exponent digits */
-  }
-  ungetc(rn.c, rn.f);  /* unread look-ahead char */
-  l_unlockfile(rn.f);
-  rn.buff[rn.n] = '\0';  /* finish string */
-  if (lua_stringtonumber(L, rn.buff))  /* is this a valid number? */
-    return 1;  /* ok */
-  else {  /* invalid format */
-   lua_pushnil(L);  /* "result" to be removed */
-   return 0;  /* read fails */
-  }
-}
-
-
-static int test_eof (lua_State *L, FILE *f) {
-  int c = getc(f);
-  ungetc(c, f);  /* no-op when c == EOF */
-  lua_pushliteral(L, "");
-  return (c != EOF);
-}
-
-
-static int read_line (lua_State *L, FILE *f, int chop) {
-  luaL_Buffer b;
-  int c = '\0';
-  luaL_buffinit(L, &b);
-  while (c != EOF && c != '\n') {  /* repeat until end of line */
-    char *buff = luaL_prepbuffer(&b);  /* preallocate buffer */
-    int i = 0;
-    l_lockfile(f);  /* no memory errors can happen inside the lock */
-    while (i < LUAL_BUFFERSIZE && (c = l_getc(f)) != EOF && c != '\n')
-      buff[i++] = c;
-    l_unlockfile(f);
-    luaL_addsize(&b, i);
-  }
-  if (!chop && c == '\n')  /* want a newline and have one? */
-    luaL_addchar(&b, c);  /* add ending newline to result */
-  luaL_pushresult(&b);  /* close buffer */
-  /* return ok if read something (either a newline or something else) */
-  return (c == '\n' || lua_rawlen(L, -1) > 0);
-}
-
-
-static void read_all (lua_State *L, FILE *f) {
-  size_t nr;
-  luaL_Buffer b;
-  luaL_buffinit(L, &b);
-  do {  /* read file in chunks of LUAL_BUFFERSIZE bytes */
-    char *p = luaL_prepbuffer(&b);
-    nr = fread(p, sizeof(char), LUAL_BUFFERSIZE, f);
-    luaL_addsize(&b, nr);
-  } while (nr == LUAL_BUFFERSIZE);
-  luaL_pushresult(&b);  /* close buffer */
-}
-
-
-static int read_chars (lua_State *L, FILE *f, size_t n) {
-  size_t nr;  /* number of chars actually read */
-  char *p;
-  luaL_Buffer b;
-  luaL_buffinit(L, &b);
-  p = luaL_prepbuffsize(&b, n);  /* prepare buffer to read whole block */
-  nr = fread(p, sizeof(char), n, f);  /* try to read 'n' chars */
-  luaL_addsize(&b, nr);
-  luaL_pushresult(&b);  /* close buffer */
-  return (nr > 0);  /* true iff read something */
-}
-
-
-static int g_read (lua_State *L, FILE *f, int first) {
-  int nargs = lua_gettop(L) - 1;
-  int success;
-  int n;
-  clearerr(f);
-  if (nargs == 0) {  /* no arguments? */
-    success = read_line(L, f, 1);
-    n = first+1;  /* to return 1 result */
-  }
-  else {  /* ensure stack space for all results and for auxlib's buffer */
-    luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");
-    success = 1;
-    for (n = first; nargs-- && success; n++) {
-      if (lua_type(L, n) == LUA_TNUMBER) {
-        size_t l = (size_t)luaL_checkinteger(L, n);
-        success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
-      }
-      else {
-        const char *p = luaL_checkstring(L, n);
-        if (*p == '*') p++;  /* skip optional '*' (for compatibility) */
-        switch (*p) {
-          case 'n':  /* number */
-            success = read_number(L, f);
-            break;
-          case 'l':  /* line */
-            success = read_line(L, f, 1);
-            break;
-          case 'L':  /* line with end-of-line */
-            success = read_line(L, f, 0);
-            break;
-          case 'a':  /* file */
-            read_all(L, f);  /* read entire file */
-            success = 1; /* always success */
-            break;
-          default:
-            return luaL_argerror(L, n, "invalid format");
-        }
-      }
-    }
-  }
-  if (ferror(f))
-    return luaL_fileresult(L, 0, NULL);
-  if (!success) {
-    lua_pop(L, 1);  /* remove last result */
-    lua_pushnil(L);  /* push nil instead */
-  }
-  return n - first;
-}
-
-
-static int io_read (lua_State *L) {
-  return g_read(L, getiofile(L, IO_INPUT), 1);
-}
-
-
-static int f_read (lua_State *L) {
-  return g_read(L, tofile(L), 2);
-}
-
-
-static int io_readline (lua_State *L) {
-  LStream *p = (LStream *)lua_touserdata(L, lua_upvalueindex(1));
-  int i;
-  int n = (int)lua_tointeger(L, lua_upvalueindex(2));
-  if (isclosed(p))  /* file is already closed? */
-    return luaL_error(L, "file is already closed");
-  lua_settop(L , 1);
-  luaL_checkstack(L, n, "too many arguments");
-  for (i = 1; i <= n; i++)  /* push arguments to 'g_read' */
-    lua_pushvalue(L, lua_upvalueindex(3 + i));
-  n = g_read(L, p->f, 2);  /* 'n' is number of results */
-  lua_assert(n > 0);  /* should return at least a nil */
-  if (lua_toboolean(L, -n))  /* read at least one value? */
-    return n;  /* return them */
-  else {  /* first result is nil: EOF or error */
-    if (n > 1) {  /* is there error information? */
-      /* 2nd result is error message */
-      return luaL_error(L, "%s", lua_tostring(L, -n + 1));
-    }
-    if (lua_toboolean(L, lua_upvalueindex(3))) {  /* generator created file? */
-      lua_settop(L, 0);
-      lua_pushvalue(L, lua_upvalueindex(1));
-      aux_close(L);  /* close it */
-    }
-    return 0;
-  }
-}
-
-/* }====================================================== */
-
-
-static int g_write (lua_State *L, FILE *f, int arg) {
-  int nargs = lua_gettop(L) - arg;
-  int status = 1;
-  for (; nargs--; arg++) {
-    if (lua_type(L, arg) == LUA_TNUMBER) {
-      /* optimization: could be done exactly as for strings */
-      int len = lua_isinteger(L, arg)
-                ? fprintf(f, LUA_INTEGER_FMT, lua_tointeger(L, arg))
-                : fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg));
-      status = status && (len > 0);
-    }
-    else {
-      size_t l;
-      const char *s = luaL_checklstring(L, arg, &l);
-      status = status && (fwrite(s, sizeof(char), l, f) == l);
-    }
-  }
-  if (status) return 1;  /* file handle already on stack top */
-  else return luaL_fileresult(L, status, NULL);
-}
-
-
-static int io_write (lua_State *L) {
-  return g_write(L, getiofile(L, IO_OUTPUT), 1);
-}
-
-
-static int f_write (lua_State *L) {
-  FILE *f = tofile(L);
-  lua_pushvalue(L, 1);  /* push file at the stack top (to be returned) */
-  return g_write(L, f, 2);
-}
-
-
-static int f_seek (lua_State *L) {
-  static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
-  static const char *const modenames[] = {"set", "cur", "end", NULL};
-  FILE *f = tofile(L);
-  int op = luaL_checkoption(L, 2, "cur", modenames);
-  lua_Integer p3 = luaL_optinteger(L, 3, 0);
-  l_seeknum offset = (l_seeknum)p3;
-  luaL_argcheck(L, (lua_Integer)offset == p3, 3,
-                  "not an integer in proper range");
-  op = l_fseek(f, offset, mode[op]);
-  if (op)
-    return luaL_fileresult(L, 0, NULL);  /* error */
-  else {
-    lua_pushinteger(L, (lua_Integer)l_ftell(f));
-    return 1;
-  }
-}
-
-
-static int f_setvbuf (lua_State *L) {
-  static const int mode[] = {_IONBF, _IOFBF, _IOLBF};
-  static const char *const modenames[] = {"no", "full", "line", NULL};
-  FILE *f = tofile(L);
-  int op = luaL_checkoption(L, 2, NULL, modenames);
-  lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE);
-  int res = setvbuf(f, NULL, mode[op], (size_t)sz);
-  return luaL_fileresult(L, res == 0, NULL);
-}
-
-
-
-static int io_flush (lua_State *L) {
-  return luaL_fileresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);
-}
-
-
-static int f_flush (lua_State *L) {
-  return luaL_fileresult(L, fflush(tofile(L)) == 0, NULL);
-}
-
-
-/*
-** functions for 'io' library
-*/
-static const luaL_Reg iolib[] = {
-  {"close", io_close},
-  {"flush", io_flush},
-  {"input", io_input},
-  {"lines", io_lines},
-  {"open", io_open},
-  {"output", io_output},
-  {"popen", io_popen},
-  {"read", io_read},
-  {"tmpfile", io_tmpfile},
-  {"type", io_type},
-  {"write", io_write},
-  {NULL, NULL}
-};
-
-
-/*
-** methods for file handles
-*/
-static const luaL_Reg flib[] = {
-  {"close", io_close},
-  {"flush", f_flush},
-  {"lines", f_lines},
-  {"read", f_read},
-  {"seek", f_seek},
-  {"setvbuf", f_setvbuf},
-  {"write", f_write},
-  {"__gc", f_gc},
-  {"__tostring", f_tostring},
-  {NULL, NULL}
-};
-
-
-static void createmeta (lua_State *L) {
-  luaL_newmetatable(L, LUA_FILEHANDLE);  /* create metatable for file handles */
-  lua_pushvalue(L, -1);  /* push metatable */
-  lua_setfield(L, -2, "__index");  /* metatable.__index = metatable */
-  luaL_setfuncs(L, flib, 0);  /* add file methods to new metatable */
-  lua_pop(L, 1);  /* pop new metatable */
-}
-
-
-/*
-** function to (not) close the standard files stdin, stdout, and stderr
-*/
-static int io_noclose (lua_State *L) {
-  LStream *p = tolstream(L);
-  p->closef = &io_noclose;  /* keep file opened */
-  lua_pushnil(L);
-  lua_pushliteral(L, "cannot close standard file");
-  return 2;
-}
-
-
-static void createstdfile (lua_State *L, FILE *f, const char *k,
-                           const char *fname) {
-  LStream *p = newprefile(L);
-  p->f = f;
-  p->closef = &io_noclose;
-  if (k != NULL) {
-    lua_pushvalue(L, -1);
-    lua_setfield(L, LUA_REGISTRYINDEX, k);  /* add file to registry */
-  }
-  lua_setfield(L, -2, fname);  /* add file to module */
-}
-
-
-LUAMOD_API int luaopen_io (lua_State *L) {
-  luaL_newlib(L, iolib);  /* new module */
-  createmeta(L);
-  /* create (and set) default files */
-  createstdfile(L, stdin, IO_INPUT, "stdin");
-  createstdfile(L, stdout, IO_OUTPUT, "stdout");
-  createstdfile(L, stderr, NULL, "stderr");
-  return 1;
-}
-
diff --git a/src/lib/lualib/lmathlib.c b/src/lib/lualib/lmathlib.c
deleted file mode 100644
index 94815f1..0000000
--- a/src/lib/lualib/lmathlib.c
+++ /dev/null
@@ -1,407 +0,0 @@
-/*
-** $Id: lmathlib.c,v 1.117 2015/10/02 15:39:23 roberto Exp $
-** Standard mathematical library
-** See Copyright Notice in lua.h
-*/
-
-#define lmathlib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <stdlib.h>
-#include <math.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-#undef PI
-#define PI	(l_mathop(3.141592653589793238462643383279502884))
-
-
-#if !defined(l_rand)		/* { */
-#if defined(LUA_USE_POSIX)
-#define l_rand()	random()
-#define l_srand(x)	srandom(x)
-#define L_RANDMAX	2147483647	/* (2^31 - 1), following POSIX */
-#else
-#define l_rand()	rand()
-#define l_srand(x)	srand(x)
-#define L_RANDMAX	RAND_MAX
-#endif
-#endif				/* } */
-
-
-static int math_abs (lua_State *L) {
-  if (lua_isinteger(L, 1)) {
-    lua_Integer n = lua_tointeger(L, 1);
-    if (n < 0) n = (lua_Integer)(0u - (lua_Unsigned)n);
-    lua_pushinteger(L, n);
-  }
-  else
-    lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_sin (lua_State *L) {
-  lua_pushnumber(L, l_mathop(sin)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_cos (lua_State *L) {
-  lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_tan (lua_State *L) {
-  lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_asin (lua_State *L) {
-  lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_acos (lua_State *L) {
-  lua_pushnumber(L, l_mathop(acos)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_atan (lua_State *L) {
-  lua_Number y = luaL_checknumber(L, 1);
-  lua_Number x = luaL_optnumber(L, 2, 1);
-  lua_pushnumber(L, l_mathop(atan2)(y, x));
-  return 1;
-}
-
-
-static int math_toint (lua_State *L) {
-  int valid;
-  lua_Integer n = lua_tointegerx(L, 1, &valid);
-  if (valid)
-    lua_pushinteger(L, n);
-  else {
-    luaL_checkany(L, 1);
-    lua_pushnil(L);  /* value is not convertible to integer */
-  }
-  return 1;
-}
-
-
-static void pushnumint (lua_State *L, lua_Number d) {
-  lua_Integer n;
-  if (lua_numbertointeger(d, &n))  /* does 'd' fit in an integer? */
-    lua_pushinteger(L, n);  /* result is integer */
-  else
-    lua_pushnumber(L, d);  /* result is float */
-}
-
-
-static int math_floor (lua_State *L) {
-  if (lua_isinteger(L, 1))
-    lua_settop(L, 1);  /* integer is its own floor */
-  else {
-    lua_Number d = l_mathop(floor)(luaL_checknumber(L, 1));
-    pushnumint(L, d);
-  }
-  return 1;
-}
-
-
-static int math_ceil (lua_State *L) {
-  if (lua_isinteger(L, 1))
-    lua_settop(L, 1);  /* integer is its own ceil */
-  else {
-    lua_Number d = l_mathop(ceil)(luaL_checknumber(L, 1));
-    pushnumint(L, d);
-  }
-  return 1;
-}
-
-
-static int math_fmod (lua_State *L) {
-  if (lua_isinteger(L, 1) && lua_isinteger(L, 2)) {
-    lua_Integer d = lua_tointeger(L, 2);
-    if ((lua_Unsigned)d + 1u <= 1u) {  /* special cases: -1 or 0 */
-      luaL_argcheck(L, d != 0, 2, "zero");
-      lua_pushinteger(L, 0);  /* avoid overflow with 0x80000... / -1 */
-    }
-    else
-      lua_pushinteger(L, lua_tointeger(L, 1) % d);
-  }
-  else
-    lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1),
-                                     luaL_checknumber(L, 2)));
-  return 1;
-}
-
-
-/*
-** next function does not use 'modf', avoiding problems with 'double*'
-** (which is not compatible with 'float*') when lua_Number is not
-** 'double'.
-*/
-static int math_modf (lua_State *L) {
-  if (lua_isinteger(L ,1)) {
-    lua_settop(L, 1);  /* number is its own integer part */
-    lua_pushnumber(L, 0);  /* no fractional part */
-  }
-  else {
-    lua_Number n = luaL_checknumber(L, 1);
-    /* integer part (rounds toward zero) */
-    lua_Number ip = (n < 0) ? l_mathop(ceil)(n) : l_mathop(floor)(n);
-    pushnumint(L, ip);
-    /* fractional part (test needed for inf/-inf) */
-    lua_pushnumber(L, (n == ip) ? l_mathop(0.0) : (n - ip));
-  }
-  return 2;
-}
-
-
-static int math_sqrt (lua_State *L) {
-  lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-
-static int math_ult (lua_State *L) {
-  lua_Integer a = luaL_checkinteger(L, 1);
-  lua_Integer b = luaL_checkinteger(L, 2);
-  lua_pushboolean(L, (lua_Unsigned)a < (lua_Unsigned)b);
-  return 1;
-}
-
-static int math_log (lua_State *L) {
-  lua_Number x = luaL_checknumber(L, 1);
-  lua_Number res;
-  if (lua_isnoneornil(L, 2))
-    res = l_mathop(log)(x);
-  else {
-    lua_Number base = luaL_checknumber(L, 2);
-#if !defined(LUA_USE_C89)
-    if (base == 2.0) res = l_mathop(log2)(x); else
-#endif
-    if (base == 10.0) res = l_mathop(log10)(x);
-    else res = l_mathop(log)(x)/l_mathop(log)(base);
-  }
-  lua_pushnumber(L, res);
-  return 1;
-}
-
-static int math_exp (lua_State *L) {
-  lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_deg (lua_State *L) {
-  lua_pushnumber(L, luaL_checknumber(L, 1) * (l_mathop(180.0) / PI));
-  return 1;
-}
-
-static int math_rad (lua_State *L) {
-  lua_pushnumber(L, luaL_checknumber(L, 1) * (PI / l_mathop(180.0)));
-  return 1;
-}
-
-
-static int math_min (lua_State *L) {
-  int n = lua_gettop(L);  /* number of arguments */
-  int imin = 1;  /* index of current minimum value */
-  int i;
-  luaL_argcheck(L, n >= 1, 1, "value expected");
-  for (i = 2; i <= n; i++) {
-    if (lua_compare(L, i, imin, LUA_OPLT))
-      imin = i;
-  }
-  lua_pushvalue(L, imin);
-  return 1;
-}
-
-
-static int math_max (lua_State *L) {
-  int n = lua_gettop(L);  /* number of arguments */
-  int imax = 1;  /* index of current maximum value */
-  int i;
-  luaL_argcheck(L, n >= 1, 1, "value expected");
-  for (i = 2; i <= n; i++) {
-    if (lua_compare(L, imax, i, LUA_OPLT))
-      imax = i;
-  }
-  lua_pushvalue(L, imax);
-  return 1;
-}
-
-/*
-** This function uses 'double' (instead of 'lua_Number') to ensure that
-** all bits from 'l_rand' can be represented, and that 'RANDMAX + 1.0'
-** will keep full precision (ensuring that 'r' is always less than 1.0.)
-*/
-static int math_random (lua_State *L) {
-  lua_Integer low, up;
-  double r = (double)l_rand() * (1.0 / ((double)L_RANDMAX + 1.0));
-  switch (lua_gettop(L)) {  /* check number of arguments */
-    case 0: {  /* no arguments */
-      lua_pushnumber(L, (lua_Number)r);  /* Number between 0 and 1 */
-      return 1;
-    }
-    case 1: {  /* only upper limit */
-      low = 1;
-      up = luaL_checkinteger(L, 1);
-      break;
-    }
-    case 2: {  /* lower and upper limits */
-      low = luaL_checkinteger(L, 1);
-      up = luaL_checkinteger(L, 2);
-      break;
-    }
-    default: return luaL_error(L, "wrong number of arguments");
-  }
-  /* random integer in the interval [low, up] */
-  luaL_argcheck(L, low <= up, 1, "interval is empty"); 
-  luaL_argcheck(L, low >= 0 || up <= LUA_MAXINTEGER + low, 1,
-                   "interval too large");
-  r *= (double)(up - low) + 1.0;
-  lua_pushinteger(L, (lua_Integer)r + low);
-  return 1;
-}
-
-
-static int math_randomseed (lua_State *L) {
-  l_srand((unsigned int)(lua_Integer)luaL_checknumber(L, 1));
-  (void)l_rand(); /* discard first value to avoid undesirable correlations */
-  return 0;
-}
-
-
-static int math_type (lua_State *L) {
-  if (lua_type(L, 1) == LUA_TNUMBER) {
-      if (lua_isinteger(L, 1))
-        lua_pushliteral(L, "integer"); 
-      else
-        lua_pushliteral(L, "float"); 
-  }
-  else {
-    luaL_checkany(L, 1);
-    lua_pushnil(L);
-  }
-  return 1;
-}
-
-
-/*
-** {==================================================================
-** Deprecated functions (for compatibility only)
-** ===================================================================
-*/
-#if defined(LUA_COMPAT_MATHLIB)
-
-static int math_cosh (lua_State *L) {
-  lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_sinh (lua_State *L) {
-  lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_tanh (lua_State *L) {
-  lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_pow (lua_State *L) {
-  lua_Number x = luaL_checknumber(L, 1);
-  lua_Number y = luaL_checknumber(L, 2);
-  lua_pushnumber(L, l_mathop(pow)(x, y));
-  return 1;
-}
-
-static int math_frexp (lua_State *L) {
-  int e;
-  lua_pushnumber(L, l_mathop(frexp)(luaL_checknumber(L, 1), &e));
-  lua_pushinteger(L, e);
-  return 2;
-}
-
-static int math_ldexp (lua_State *L) {
-  lua_Number x = luaL_checknumber(L, 1);
-  int ep = (int)luaL_checkinteger(L, 2);
-  lua_pushnumber(L, l_mathop(ldexp)(x, ep));
-  return 1;
-}
-
-static int math_log10 (lua_State *L) {
-  lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-#endif
-/* }================================================================== */
-
-
-
-static const luaL_Reg mathlib[] = {
-  {"abs",   math_abs},
-  {"acos",  math_acos},
-  {"asin",  math_asin},
-  {"atan",  math_atan},
-  {"ceil",  math_ceil},
-  {"cos",   math_cos},
-  {"deg",   math_deg},
-  {"exp",   math_exp},
-  {"tointeger", math_toint},
-  {"floor", math_floor},
-  {"fmod",   math_fmod},
-  {"ult",   math_ult},
-  {"log",   math_log},
-  {"max",   math_max},
-  {"min",   math_min},
-  {"modf",   math_modf},
-  {"rad",   math_rad},
-  {"random",     math_random},
-  {"randomseed", math_randomseed},
-  {"sin",   math_sin},
-  {"sqrt",  math_sqrt},
-  {"tan",   math_tan},
-  {"type", math_type},
-#if defined(LUA_COMPAT_MATHLIB)
-  {"atan2", math_atan},
-  {"cosh",   math_cosh},
-  {"sinh",   math_sinh},
-  {"tanh",   math_tanh},
-  {"pow",   math_pow},
-  {"frexp", math_frexp},
-  {"ldexp", math_ldexp},
-  {"log10", math_log10},
-#endif
-  /* placeholders */
-  {"pi", NULL},
-  {"huge", NULL},
-  {"maxinteger", NULL},
-  {"mininteger", NULL},
-  {NULL, NULL}
-};
-
-
-/*
-** Open math library
-*/
-LUAMOD_API int luaopen_math (lua_State *L) {
-  luaL_newlib(L, mathlib);
-  lua_pushnumber(L, PI);
-  lua_setfield(L, -2, "pi");
-  lua_pushnumber(L, (lua_Number)HUGE_VAL);
-  lua_setfield(L, -2, "huge");
-  lua_pushinteger(L, LUA_MAXINTEGER);
-  lua_setfield(L, -2, "maxinteger");
-  lua_pushinteger(L, LUA_MININTEGER);
-  lua_setfield(L, -2, "mininteger");
-  return 1;
-}
-
diff --git a/src/lib/lualib/loadlib.c b/src/lib/lualib/loadlib.c
deleted file mode 100644
index 7911928..0000000
--- a/src/lib/lualib/loadlib.c
+++ /dev/null
@@ -1,787 +0,0 @@
-/*
-** $Id: loadlib.c,v 1.127 2015/11/23 11:30:45 roberto Exp $
-** Dynamic library loader for Lua
-** See Copyright Notice in lua.h
-**
-** This module contains an implementation of loadlib for Unix systems
-** that have dlfcn, an implementation for Windows, and a stub for other
-** systems.
-*/
-
-#define loadlib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-/*
-** LUA_PATH_VAR and LUA_CPATH_VAR are the names of the environment
-** variables that Lua check to set its paths.
-*/
-#if !defined(LUA_PATH_VAR)
-#define LUA_PATH_VAR	"LUA_PATH"
-#endif
-
-#if !defined(LUA_CPATH_VAR)
-#define LUA_CPATH_VAR	"LUA_CPATH"
-#endif
-
-#define LUA_PATHSUFFIX		"_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
-
-#define LUA_PATHVARVERSION		LUA_PATH_VAR LUA_PATHSUFFIX
-#define LUA_CPATHVARVERSION		LUA_CPATH_VAR LUA_PATHSUFFIX
-
-/*
-** LUA_PATH_SEP is the character that separates templates in a path.
-** LUA_PATH_MARK is the string that marks the substitution points in a
-** template.
-** LUA_EXEC_DIR in a Windows path is replaced by the executable's
-** directory.
-** LUA_IGMARK is a mark to ignore all before it when building the
-** luaopen_ function name.
-*/
-#if !defined (LUA_PATH_SEP)
-#define LUA_PATH_SEP		";"
-#endif
-#if !defined (LUA_PATH_MARK)
-#define LUA_PATH_MARK		"?"
-#endif
-#if !defined (LUA_EXEC_DIR)
-#define LUA_EXEC_DIR		"!"
-#endif
-#if !defined (LUA_IGMARK)
-#define LUA_IGMARK		"-"
-#endif
-
-
-/*
-** LUA_CSUBSEP is the character that replaces dots in submodule names
-** when searching for a C loader.
-** LUA_LSUBSEP is the character that replaces dots in submodule names
-** when searching for a Lua loader.
-*/
-#if !defined(LUA_CSUBSEP)
-#define LUA_CSUBSEP		LUA_DIRSEP
-#endif
-
-#if !defined(LUA_LSUBSEP)
-#define LUA_LSUBSEP		LUA_DIRSEP
-#endif
-
-
-/* prefix for open functions in C libraries */
-#define LUA_POF		"luaopen_"
-
-/* separator for open functions in C libraries */
-#define LUA_OFSEP	"_"
-
-
-/*
-** unique key for table in the registry that keeps handles
-** for all loaded C libraries
-*/
-static const int CLIBS = 0;
-
-#define LIB_FAIL	"open"
-
-#define setprogdir(L)		((void)0)
-
-
-/*
-** system-dependent functions
-*/
-
-/*
-** unload library 'lib'
-*/
-static void lsys_unloadlib (void *lib);
-
-/*
-** load C library in file 'path'. If 'seeglb', load with all names in
-** the library global.
-** Returns the library; in case of error, returns NULL plus an
-** error string in the stack.
-*/
-static void *lsys_load (lua_State *L, const char *path, int seeglb);
-
-/*
-** Try to find a function named 'sym' in library 'lib'.
-** Returns the function; in case of error, returns NULL plus an
-** error string in the stack.
-*/
-static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym);
-
-
-
-
-#if defined(LUA_USE_DLOPEN)	/* { */
-/*
-** {========================================================================
-** This is an implementation of loadlib based on the dlfcn interface.
-** The dlfcn interface is available in Linux, SunOS, Solaris, IRIX, FreeBSD,
-** NetBSD, AIX 4.2, HPUX 11, and  probably most other Unix flavors, at least
-** as an emulation layer on top of native functions.
-** =========================================================================
-*/
-
-#include <dlfcn.h>
-
-/*
-** Macro to convert pointer-to-void* to pointer-to-function. This cast
-** is undefined according to ISO C, but POSIX assumes that it works.
-** (The '__extension__' in gnu compilers is only to avoid warnings.)
-*/
-#if defined(__GNUC__)
-#define cast_func(p) (__extension__ (lua_CFunction)(p))
-#else
-#define cast_func(p) ((lua_CFunction)(p))
-#endif
-
-
-static void lsys_unloadlib (void *lib) {
-  dlclose(lib);
-}
-
-
-static void *lsys_load (lua_State *L, const char *path, int seeglb) {
-  void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL));
-  if (lib == NULL) lua_pushstring(L, dlerror());
-  return lib;
-}
-
-
-static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
-  lua_CFunction f = cast_func(dlsym(lib, sym));
-  if (f == NULL) lua_pushstring(L, dlerror());
-  return f;
-}
-
-/* }====================================================== */
-
-
-
-#elif defined(LUA_DL_DLL)	/* }{ */
-/*
-** {======================================================================
-** This is an implementation of loadlib for Windows using native functions.
-** =======================================================================
-*/
-
-#include <windows.h>
-
-#undef setprogdir
-
-/*
-** optional flags for LoadLibraryEx
-*/
-#if !defined(LUA_LLE_FLAGS)
-#define LUA_LLE_FLAGS	0
-#endif
-
-
-static void setprogdir (lua_State *L) {
-  char buff[MAX_PATH + 1];
-  char *lb;
-  DWORD nsize = sizeof(buff)/sizeof(char);
-  DWORD n = GetModuleFileNameA(NULL, buff, nsize);
-  if (n == 0 || n == nsize || (lb = strrchr(buff, '\\')) == NULL)
-    luaL_error(L, "unable to get ModuleFileName");
-  else {
-    *lb = '\0';
-    luaL_gsub(L, lua_tostring(L, -1), LUA_EXEC_DIR, buff);
-    lua_remove(L, -2);  /* remove original string */
-  }
-}
-
-
-static void pusherror (lua_State *L) {
-  int error = GetLastError();
-  char buffer[128];
-  if (FormatMessageA(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
-      NULL, error, 0, buffer, sizeof(buffer)/sizeof(char), NULL))
-    lua_pushstring(L, buffer);
-  else
-    lua_pushfstring(L, "system error %d\n", error);
-}
-
-static void lsys_unloadlib (void *lib) {
-  FreeLibrary((HMODULE)lib);
-}
-
-
-static void *lsys_load (lua_State *L, const char *path, int seeglb) {
-  HMODULE lib = LoadLibraryExA(path, NULL, LUA_LLE_FLAGS);
-  (void)(seeglb);  /* not used: symbols are 'global' by default */
-  if (lib == NULL) pusherror(L);
-  return lib;
-}
-
-
-static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
-  lua_CFunction f = (lua_CFunction)GetProcAddress((HMODULE)lib, sym);
-  if (f == NULL) pusherror(L);
-  return f;
-}
-
-/* }====================================================== */
-
-
-#else				/* }{ */
-/*
-** {======================================================
-** Fallback for other systems
-** =======================================================
-*/
-
-#undef LIB_FAIL
-#define LIB_FAIL	"absent"
-
-
-#define DLMSG	"dynamic libraries not enabled; check your Lua installation"
-
-
-static void lsys_unloadlib (void *lib) {
-  (void)(lib);  /* not used */
-}
-
-
-static void *lsys_load (lua_State *L, const char *path, int seeglb) {
-  (void)(path); (void)(seeglb);  /* not used */
-  lua_pushliteral(L, DLMSG);
-  return NULL;
-}
-
-
-static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
-  (void)(lib); (void)(sym);  /* not used */
-  lua_pushliteral(L, DLMSG);
-  return NULL;
-}
-
-/* }====================================================== */
-#endif				/* } */
-
-
-/*
-** return registry.CLIBS[path]
-*/
-static void *checkclib (lua_State *L, const char *path) {
-  void *plib;
-  lua_rawgetp(L, LUA_REGISTRYINDEX, &CLIBS);
-  lua_getfield(L, -1, path);
-  plib = lua_touserdata(L, -1);  /* plib = CLIBS[path] */
-  lua_pop(L, 2);  /* pop CLIBS table and 'plib' */
-  return plib;
-}
-
-
-/*
-** registry.CLIBS[path] = plib        -- for queries
-** registry.CLIBS[#CLIBS + 1] = plib  -- also keep a list of all libraries
-*/
-static void addtoclib (lua_State *L, const char *path, void *plib) {
-  lua_rawgetp(L, LUA_REGISTRYINDEX, &CLIBS);
-  lua_pushlightuserdata(L, plib);
-  lua_pushvalue(L, -1);
-  lua_setfield(L, -3, path);  /* CLIBS[path] = plib */
-  lua_rawseti(L, -2, luaL_len(L, -2) + 1);  /* CLIBS[#CLIBS + 1] = plib */
-  lua_pop(L, 1);  /* pop CLIBS table */
-}
-
-
-/*
-** __gc tag method for CLIBS table: calls 'lsys_unloadlib' for all lib
-** handles in list CLIBS
-*/
-static int gctm (lua_State *L) {
-  lua_Integer n = luaL_len(L, 1);
-  for (; n >= 1; n--) {  /* for each handle, in reverse order */
-    lua_rawgeti(L, 1, n);  /* get handle CLIBS[n] */
-    lsys_unloadlib(lua_touserdata(L, -1));
-    lua_pop(L, 1);  /* pop handle */
-  }
-  return 0;
-}
-
-
-
-/* error codes for 'lookforfunc' */
-#define ERRLIB		1
-#define ERRFUNC		2
-
-/*
-** Look for a C function named 'sym' in a dynamically loaded library
-** 'path'.
-** First, check whether the library is already loaded; if not, try
-** to load it.
-** Then, if 'sym' is '*', return true (as library has been loaded).
-** Otherwise, look for symbol 'sym' in the library and push a
-** C function with that symbol.
-** Return 0 and 'true' or a function in the stack; in case of
-** errors, return an error code and an error message in the stack.
-*/
-static int lookforfunc (lua_State *L, const char *path, const char *sym) {
-  void *reg = checkclib(L, path);  /* check loaded C libraries */
-  if (reg == NULL) {  /* must load library? */
-    reg = lsys_load(L, path, *sym == '*');  /* global symbols if 'sym'=='*' */
-    if (reg == NULL) return ERRLIB;  /* unable to load library */
-    addtoclib(L, path, reg);
-  }
-  if (*sym == '*') {  /* loading only library (no function)? */
-    lua_pushboolean(L, 1);  /* return 'true' */
-    return 0;  /* no errors */
-  }
-  else {
-    lua_CFunction f = lsys_sym(L, reg, sym);
-    if (f == NULL)
-      return ERRFUNC;  /* unable to find function */
-    lua_pushcfunction(L, f);  /* else create new function */
-    return 0;  /* no errors */
-  }
-}
-
-
-static int ll_loadlib (lua_State *L) {
-  const char *path = luaL_checkstring(L, 1);
-  const char *init = luaL_checkstring(L, 2);
-  int stat = lookforfunc(L, path, init);
-  if (stat == 0)  /* no errors? */
-    return 1;  /* return the loaded function */
-  else {  /* error; error message is on stack top */
-    lua_pushnil(L);
-    lua_insert(L, -2);
-    lua_pushstring(L, (stat == ERRLIB) ?  LIB_FAIL : "init");
-    return 3;  /* return nil, error message, and where */
-  }
-}
-
-
-
-/*
-** {======================================================
-** 'require' function
-** =======================================================
-*/
-
-
-static int readable (const char *filename) {
-  FILE *f = fopen(filename, "r");  /* try to open file */
-  if (f == NULL) return 0;  /* open failed */
-  fclose(f);
-  return 1;
-}
-
-
-static const char *pushnexttemplate (lua_State *L, const char *path) {
-  const char *l;
-  while (*path == *LUA_PATH_SEP) path++;  /* skip separators */
-  if (*path == '\0') return NULL;  /* no more templates */
-  l = strchr(path, *LUA_PATH_SEP);  /* find next separator */
-  if (l == NULL) l = path + strlen(path);
-  lua_pushlstring(L, path, l - path);  /* template */
-  return l;
-}
-
-
-static const char *searchpath (lua_State *L, const char *name,
-                                             const char *path,
-                                             const char *sep,
-                                             const char *dirsep) {
-  luaL_Buffer msg;  /* to build error message */
-  luaL_buffinit(L, &msg);
-  if (*sep != '\0')  /* non-empty separator? */
-    name = luaL_gsub(L, name, sep, dirsep);  /* replace it by 'dirsep' */
-  while ((path = pushnexttemplate(L, path)) != NULL) {
-    const char *filename = luaL_gsub(L, lua_tostring(L, -1),
-                                     LUA_PATH_MARK, name);
-    lua_remove(L, -2);  /* remove path template */
-    if (readable(filename))  /* does file exist and is readable? */
-      return filename;  /* return that file name */
-    lua_pushfstring(L, "\n\tno file '%s'", filename);
-    lua_remove(L, -2);  /* remove file name */
-    luaL_addvalue(&msg);  /* concatenate error msg. entry */
-  }
-  luaL_pushresult(&msg);  /* create error message */
-  return NULL;  /* not found */
-}
-
-
-static int ll_searchpath (lua_State *L) {
-  const char *f = searchpath(L, luaL_checkstring(L, 1),
-                                luaL_checkstring(L, 2),
-                                luaL_optstring(L, 3, "."),
-                                luaL_optstring(L, 4, LUA_DIRSEP));
-  if (f != NULL) return 1;
-  else {  /* error message is on top of the stack */
-    lua_pushnil(L);
-    lua_insert(L, -2);
-    return 2;  /* return nil + error message */
-  }
-}
-
-
-static const char *findfile (lua_State *L, const char *name,
-                                           const char *pname,
-                                           const char *dirsep) {
-  const char *path;
-  lua_getfield(L, lua_upvalueindex(1), pname);
-  path = lua_tostring(L, -1);
-  if (path == NULL)
-    luaL_error(L, "'package.%s' must be a string", pname);
-  return searchpath(L, name, path, ".", dirsep);
-}
-
-
-static int checkload (lua_State *L, int stat, const char *filename) {
-  if (stat) {  /* module loaded successfully? */
-    lua_pushstring(L, filename);  /* will be 2nd argument to module */
-    return 2;  /* return open function and file name */
-  }
-  else
-    return luaL_error(L, "error loading module '%s' from file '%s':\n\t%s",
-                          lua_tostring(L, 1), filename, lua_tostring(L, -1));
-}
-
-
-static int searcher_Lua (lua_State *L) {
-  const char *filename;
-  const char *name = luaL_checkstring(L, 1);
-  filename = findfile(L, name, "path", LUA_LSUBSEP);
-  if (filename == NULL) return 1;  /* module not found in this path */
-  return checkload(L, (luaL_loadfile(L, filename) == LUA_OK), filename);
-}
-
-
-/*
-** Try to find a load function for module 'modname' at file 'filename'.
-** First, change '.' to '_' in 'modname'; then, if 'modname' has
-** the form X-Y (that is, it has an "ignore mark"), build a function
-** name "luaopen_X" and look for it. (For compatibility, if that
-** fails, it also tries "luaopen_Y".) If there is no ignore mark,
-** look for a function named "luaopen_modname".
-*/
-static int loadfunc (lua_State *L, const char *filename, const char *modname) {
-  const char *openfunc;
-  const char *mark;
-  modname = luaL_gsub(L, modname, ".", LUA_OFSEP);
-  mark = strchr(modname, *LUA_IGMARK);
-  if (mark) {
-    int stat;
-    openfunc = lua_pushlstring(L, modname, mark - modname);
-    openfunc = lua_pushfstring(L, LUA_POF"%s", openfunc);
-    stat = lookforfunc(L, filename, openfunc);
-    if (stat != ERRFUNC) return stat;
-    modname = mark + 1;  /* else go ahead and try old-style name */
-  }
-  openfunc = lua_pushfstring(L, LUA_POF"%s", modname);
-  return lookforfunc(L, filename, openfunc);
-}
-
-
-static int searcher_C (lua_State *L) {
-  const char *name = luaL_checkstring(L, 1);
-  const char *filename = findfile(L, name, "cpath", LUA_CSUBSEP);
-  if (filename == NULL) return 1;  /* module not found in this path */
-  return checkload(L, (loadfunc(L, filename, name) == 0), filename);
-}
-
-
-static int searcher_Croot (lua_State *L) {
-  const char *filename;
-  const char *name = luaL_checkstring(L, 1);
-  const char *p = strchr(name, '.');
-  int stat;
-  if (p == NULL) return 0;  /* is root */
-  lua_pushlstring(L, name, p - name);
-  filename = findfile(L, lua_tostring(L, -1), "cpath", LUA_CSUBSEP);
-  if (filename == NULL) return 1;  /* root not found */
-  if ((stat = loadfunc(L, filename, name)) != 0) {
-    if (stat != ERRFUNC)
-      return checkload(L, 0, filename);  /* real error */
-    else {  /* open function not found */
-      lua_pushfstring(L, "\n\tno module '%s' in file '%s'", name, filename);
-      return 1;
-    }
-  }
-  lua_pushstring(L, filename);  /* will be 2nd argument to module */
-  return 2;
-}
-
-
-static int searcher_preload (lua_State *L) {
-  const char *name = luaL_checkstring(L, 1);
-  lua_getfield(L, LUA_REGISTRYINDEX, "_PRELOAD");
-  if (lua_getfield(L, -1, name) == LUA_TNIL)  /* not found? */
-    lua_pushfstring(L, "\n\tno field package.preload['%s']", name);
-  return 1;
-}
-
-
-static void findloader (lua_State *L, const char *name) {
-  int i;
-  luaL_Buffer msg;  /* to build error message */
-  luaL_buffinit(L, &msg);
-  /* push 'package.searchers' to index 3 in the stack */
-  if (lua_getfield(L, lua_upvalueindex(1), "searchers") != LUA_TTABLE)
-    luaL_error(L, "'package.searchers' must be a table");
-  /*  iterate over available searchers to find a loader */
-  for (i = 1; ; i++) {
-    if (lua_rawgeti(L, 3, i) == LUA_TNIL) {  /* no more searchers? */
-      lua_pop(L, 1);  /* remove nil */
-      luaL_pushresult(&msg);  /* create error message */
-      luaL_error(L, "module '%s' not found:%s", name, lua_tostring(L, -1));
-    }
-    lua_pushstring(L, name);
-    lua_call(L, 1, 2);  /* call it */
-    if (lua_isfunction(L, -2))  /* did it find a loader? */
-      return;  /* module loader found */
-    else if (lua_isstring(L, -2)) {  /* searcher returned error message? */
-      lua_pop(L, 1);  /* remove extra return */
-      luaL_addvalue(&msg);  /* concatenate error message */
-    }
-    else
-      lua_pop(L, 2);  /* remove both returns */
-  }
-}
-
-
-static int ll_require (lua_State *L) {
-  const char *name = luaL_checkstring(L, 1);
-  lua_settop(L, 1);  /* _LOADED table will be at index 2 */
-  lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
-  lua_getfield(L, 2, name);  /* _LOADED[name] */
-  if (lua_toboolean(L, -1))  /* is it there? */
-    return 1;  /* package is already loaded */
-  /* else must load package */
-  lua_pop(L, 1);  /* remove 'getfield' result */
-  findloader(L, name);
-  lua_pushstring(L, name);  /* pass name as argument to module loader */
-  lua_insert(L, -2);  /* name is 1st argument (before search data) */
-  lua_call(L, 2, 1);  /* run loader to load module */
-  if (!lua_isnil(L, -1))  /* non-nil return? */
-    lua_setfield(L, 2, name);  /* _LOADED[name] = returned value */
-  if (lua_getfield(L, 2, name) == LUA_TNIL) {   /* module set no value? */
-    lua_pushboolean(L, 1);  /* use true as result */
-    lua_pushvalue(L, -1);  /* extra copy to be returned */
-    lua_setfield(L, 2, name);  /* _LOADED[name] = true */
-  }
-  return 1;
-}
-
-/* }====================================================== */
-
-
-
-/*
-** {======================================================
-** 'module' function
-** =======================================================
-*/
-#if defined(LUA_COMPAT_MODULE)
-
-/*
-** changes the environment variable of calling function
-*/
-static void set_env (lua_State *L) {
-  lua_Debug ar;
-  if (lua_getstack(L, 1, &ar) == 0 ||
-      lua_getinfo(L, "f", &ar) == 0 ||  /* get calling function */
-      lua_iscfunction(L, -1))
-    luaL_error(L, "'module' not called from a Lua function");
-  lua_pushvalue(L, -2);  /* copy new environment table to top */
-  lua_setupvalue(L, -2, 1);
-  lua_pop(L, 1);  /* remove function */
-}
-
-
-static void dooptions (lua_State *L, int n) {
-  int i;
-  for (i = 2; i <= n; i++) {
-    if (lua_isfunction(L, i)) {  /* avoid 'calling' extra info. */
-      lua_pushvalue(L, i);  /* get option (a function) */
-      lua_pushvalue(L, -2);  /* module */
-      lua_call(L, 1, 0);
-    }
-  }
-}
-
-
-static void modinit (lua_State *L, const char *modname) {
-  const char *dot;
-  lua_pushvalue(L, -1);
-  lua_setfield(L, -2, "_M");  /* module._M = module */
-  lua_pushstring(L, modname);
-  lua_setfield(L, -2, "_NAME");
-  dot = strrchr(modname, '.');  /* look for last dot in module name */
-  if (dot == NULL) dot = modname;
-  else dot++;
-  /* set _PACKAGE as package name (full module name minus last part) */
-  lua_pushlstring(L, modname, dot - modname);
-  lua_setfield(L, -2, "_PACKAGE");
-}
-
-
-static int ll_module (lua_State *L) {
-  const char *modname = luaL_checkstring(L, 1);
-  int lastarg = lua_gettop(L);  /* last parameter */
-  luaL_pushmodule(L, modname, 1);  /* get/create module table */
-  /* check whether table already has a _NAME field */
-  if (lua_getfield(L, -1, "_NAME") != LUA_TNIL)
-    lua_pop(L, 1);  /* table is an initialized module */
-  else {  /* no; initialize it */
-    lua_pop(L, 1);
-    modinit(L, modname);
-  }
-  lua_pushvalue(L, -1);
-  set_env(L);
-  dooptions(L, lastarg);
-  return 1;
-}
-
-
-static int ll_seeall (lua_State *L) {
-  luaL_checktype(L, 1, LUA_TTABLE);
-  if (!lua_getmetatable(L, 1)) {
-    lua_createtable(L, 0, 1); /* create new metatable */
-    lua_pushvalue(L, -1);
-    lua_setmetatable(L, 1);
-  }
-  lua_pushglobaltable(L);
-  lua_setfield(L, -2, "__index");  /* mt.__index = _G */
-  return 0;
-}
-
-#endif
-/* }====================================================== */
-
-
-
-/* auxiliary mark (for internal use) */
-#define AUXMARK		"\1"
-
-
-/*
-** return registry.LUA_NOENV as a boolean
-*/
-static int noenv (lua_State *L) {
-  int b;
-  lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
-  b = lua_toboolean(L, -1);
-  lua_pop(L, 1);  /* remove value */
-  return b;
-}
-
-
-static void setpath (lua_State *L, const char *fieldname, const char *envname1,
-                                   const char *envname2, const char *def) {
-  const char *path = getenv(envname1);
-  if (path == NULL)  /* no environment variable? */
-    path = getenv(envname2);  /* try alternative name */
-  if (path == NULL || noenv(L))  /* no environment variable? */
-    lua_pushstring(L, def);  /* use default */
-  else {
-    /* replace ";;" by ";AUXMARK;" and then AUXMARK by default path */
-    path = luaL_gsub(L, path, LUA_PATH_SEP LUA_PATH_SEP,
-                              LUA_PATH_SEP AUXMARK LUA_PATH_SEP);
-    luaL_gsub(L, path, AUXMARK, def);
-    lua_remove(L, -2);
-  }
-  setprogdir(L);
-  lua_setfield(L, -2, fieldname);
-}
-
-
-static const luaL_Reg pk_funcs[] = {
-  {"loadlib", ll_loadlib},
-  {"searchpath", ll_searchpath},
-#if defined(LUA_COMPAT_MODULE)
-  {"seeall", ll_seeall},
-#endif
-  /* placeholders */
-  {"preload", NULL},
-  {"cpath", NULL},
-  {"path", NULL},
-  {"searchers", NULL},
-  {"loaded", NULL},
-  {NULL, NULL}
-};
-
-
-static const luaL_Reg ll_funcs[] = {
-#if defined(LUA_COMPAT_MODULE)
-  {"module", ll_module},
-#endif
-  {"require", ll_require},
-  {NULL, NULL}
-};
-
-
-static void createsearcherstable (lua_State *L) {
-  static const lua_CFunction searchers[] =
-    {searcher_preload, searcher_Lua, searcher_C, searcher_Croot, NULL};
-  int i;
-  /* create 'searchers' table */
-  lua_createtable(L, sizeof(searchers)/sizeof(searchers[0]) - 1, 0);
-  /* fill it with predefined searchers */
-  for (i=0; searchers[i] != NULL; i++) {
-    lua_pushvalue(L, -2);  /* set 'package' as upvalue for all searchers */
-    lua_pushcclosure(L, searchers[i], 1);
-    lua_rawseti(L, -2, i+1);
-  }
-#if defined(LUA_COMPAT_LOADERS)
-  lua_pushvalue(L, -1);  /* make a copy of 'searchers' table */
-  lua_setfield(L, -3, "loaders");  /* put it in field 'loaders' */
-#endif
-  lua_setfield(L, -2, "searchers");  /* put it in field 'searchers' */
-}
-
-
-/*
-** create table CLIBS to keep track of loaded C libraries,
-** setting a finalizer to close all libraries when closing state.
-*/
-static void createclibstable (lua_State *L) {
-  lua_newtable(L);  /* create CLIBS table */
-  lua_createtable(L, 0, 1);  /* create metatable for CLIBS */
-  lua_pushcfunction(L, gctm);
-  lua_setfield(L, -2, "__gc");  /* set finalizer for CLIBS table */
-  lua_setmetatable(L, -2);
-  lua_rawsetp(L, LUA_REGISTRYINDEX, &CLIBS);  /* set CLIBS table in registry */
-}
-
-
-LUAMOD_API int luaopen_package (lua_State *L) {
-  createclibstable(L);
-  luaL_newlib(L, pk_funcs);  /* create 'package' table */
-  createsearcherstable(L);
-  /* set field 'path' */
-  setpath(L, "path", LUA_PATHVARVERSION, LUA_PATH_VAR, LUA_PATH_DEFAULT);
-  /* set field 'cpath' */
-  setpath(L, "cpath", LUA_CPATHVARVERSION, LUA_CPATH_VAR, LUA_CPATH_DEFAULT);
-  /* store config information */
-  lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATH_SEP "\n" LUA_PATH_MARK "\n"
-                     LUA_EXEC_DIR "\n" LUA_IGMARK "\n");
-  lua_setfield(L, -2, "config");
-  /* set field 'loaded' */
-  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
-  lua_setfield(L, -2, "loaded");
-  /* set field 'preload' */
-  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
-  lua_setfield(L, -2, "preload");
-  lua_pushglobaltable(L);
-  lua_pushvalue(L, -2);  /* set 'package' as upvalue for next lib */
-  luaL_setfuncs(L, ll_funcs, 1);  /* open lib into global table */
-  lua_pop(L, 1);  /* pop global table */
-  return 1;  /* return 'package' table */
-}
-
diff --git a/src/lib/lualib/loslib.c b/src/lib/lualib/loslib.c
deleted file mode 100644
index 4810655..0000000
--- a/src/lib/lualib/loslib.c
+++ /dev/null
@@ -1,403 +0,0 @@
-/*
-** $Id: loslib.c,v 1.64 2016/04/18 13:06:55 roberto Exp $
-** Standard Operating System library
-** See Copyright Notice in lua.h
-*/
-
-#define loslib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <errno.h>
-#include <locale.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-/*
-** {==================================================================
-** List of valid conversion specifiers for the 'strftime' function;
-** options are grouped by length; group of length 2 start with '||'.
-** ===================================================================
-*/
-#if !defined(LUA_STRFTIMEOPTIONS)	/* { */
-
-/* options for ANSI C 89 */
-#define L_STRFTIMEC89		"aAbBcdHIjmMpSUwWxXyYZ%"
-
-/* options for ISO C 99 and POSIX */
-#define L_STRFTIMEC99 "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%" \
-	"||" "EcECExEXEyEY" "OdOeOHOIOmOMOSOuOUOVOwOWOy"
-
-/* options for Windows */
-#define L_STRFTIMEWIN "aAbBcdHIjmMpSUwWxXyYzZ%" \
-	"||" "#c#x#d#H#I#j#m#M#S#U#w#W#y#Y"
-
-#if defined(LUA_USE_WINDOWS)
-#define LUA_STRFTIMEOPTIONS	L_STRFTIMEWIN
-#elif defined(LUA_USE_C89)
-#define LUA_STRFTIMEOPTIONS	L_STRFTIMEC89
-#else  /* C99 specification */
-#define LUA_STRFTIMEOPTIONS	L_STRFTIMEC99
-#endif
-
-#endif					/* } */
-/* }================================================================== */
-
-
-/*
-** {==================================================================
-** Configuration for time-related stuff
-** ===================================================================
-*/
-
-#if !defined(l_time_t)		/* { */
-/*
-** type to represent time_t in Lua
-*/
-#define l_timet			lua_Integer
-#define l_pushtime(L,t)		lua_pushinteger(L,(lua_Integer)(t))
-
-static time_t l_checktime (lua_State *L, int arg) {
-  lua_Integer t = luaL_checkinteger(L, arg);
-  luaL_argcheck(L, (time_t)t == t, arg, "time out-of-bounds");
-  return (time_t)t;
-}
-
-#endif				/* } */
-
-
-#if !defined(l_gmtime)		/* { */
-/*
-** By default, Lua uses gmtime/localtime, except when POSIX is available,
-** where it uses gmtime_r/localtime_r
-*/
-
-#if defined(LUA_USE_POSIX)	/* { */
-
-#define l_gmtime(t,r)		gmtime_r(t,r)
-#define l_localtime(t,r)	localtime_r(t,r)
-
-#else				/* }{ */
-
-/* ISO C definitions */
-#define l_gmtime(t,r)		((void)(r)->tm_sec, gmtime(t))
-#define l_localtime(t,r)  	((void)(r)->tm_sec, localtime(t))
-
-#endif				/* } */
-
-#endif				/* } */
-
-/* }================================================================== */
-
-
-/*
-** {==================================================================
-** Configuration for 'tmpnam':
-** By default, Lua uses tmpnam except when POSIX is available, where
-** it uses mkstemp.
-** ===================================================================
-*/
-#if !defined(lua_tmpnam)	/* { */
-
-#if defined(LUA_USE_POSIX)	/* { */
-
-#include <unistd.h>
-
-#define LUA_TMPNAMBUFSIZE	32
-
-#if !defined(LUA_TMPNAMTEMPLATE)
-#define LUA_TMPNAMTEMPLATE	"/tmp/lua_XXXXXX"
-#endif
-
-#define lua_tmpnam(b,e) { \
-        strcpy(b, LUA_TMPNAMTEMPLATE); \
-        e = mkstemp(b); \
-        if (e != -1) close(e); \
-        e = (e == -1); }
-
-#else				/* }{ */
-
-/* ISO C definitions */
-#define LUA_TMPNAMBUFSIZE	L_tmpnam
-#define lua_tmpnam(b,e)		{ e = (tmpnam(b) == NULL); }
-
-#endif				/* } */
-
-#endif				/* } */
-/* }================================================================== */
-
-
-
-
-static int os_execute (lua_State *L) {
-  const char *cmd = luaL_optstring(L, 1, NULL);
-  int stat = system(cmd);
-  if (cmd != NULL)
-    return luaL_execresult(L, stat);
-  else {
-    lua_pushboolean(L, stat);  /* true if there is a shell */
-    return 1;
-  }
-}
-
-
-static int os_remove (lua_State *L) {
-  const char *filename = luaL_checkstring(L, 1);
-  return luaL_fileresult(L, remove(filename) == 0, filename);
-}
-
-
-static int os_rename (lua_State *L) {
-  const char *fromname = luaL_checkstring(L, 1);
-  const char *toname = luaL_checkstring(L, 2);
-  return luaL_fileresult(L, rename(fromname, toname) == 0, NULL);
-}
-
-
-static int os_tmpname (lua_State *L) {
-  char buff[LUA_TMPNAMBUFSIZE];
-  int err;
-  lua_tmpnam(buff, err);
-  if (err)
-    return luaL_error(L, "unable to generate a unique filename");
-  lua_pushstring(L, buff);
-  return 1;
-}
-
-
-static int os_getenv (lua_State *L) {
-  lua_pushstring(L, getenv(luaL_checkstring(L, 1)));  /* if NULL push nil */
-  return 1;
-}
-
-
-static int os_clock (lua_State *L) {
-  lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
-  return 1;
-}
-
-
-/*
-** {======================================================
-** Time/Date operations
-** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,
-**   wday=%w+1, yday=%j, isdst=? }
-** =======================================================
-*/
-
-static void setfield (lua_State *L, const char *key, int value) {
-  lua_pushinteger(L, value);
-  lua_setfield(L, -2, key);
-}
-
-static void setboolfield (lua_State *L, const char *key, int value) {
-  if (value < 0)  /* undefined? */
-    return;  /* does not set field */
-  lua_pushboolean(L, value);
-  lua_setfield(L, -2, key);
-}
-
-
-/*
-** Set all fields from structure 'tm' in the table on top of the stack
-*/
-static void setallfields (lua_State *L, struct tm *stm) {
-  setfield(L, "sec", stm->tm_sec);
-  setfield(L, "min", stm->tm_min);
-  setfield(L, "hour", stm->tm_hour);
-  setfield(L, "day", stm->tm_mday);
-  setfield(L, "month", stm->tm_mon + 1);
-  setfield(L, "year", stm->tm_year + 1900);
-  setfield(L, "wday", stm->tm_wday + 1);
-  setfield(L, "yday", stm->tm_yday + 1);
-  setboolfield(L, "isdst", stm->tm_isdst);
-}
-
-
-static int getboolfield (lua_State *L, const char *key) {
-  int res;
-  res = (lua_getfield(L, -1, key) == LUA_TNIL) ? -1 : lua_toboolean(L, -1);
-  lua_pop(L, 1);
-  return res;
-}
-
-
-/* maximum value for date fields (to avoid arithmetic overflows with 'int') */
-#if !defined(L_MAXDATEFIELD)
-#define L_MAXDATEFIELD	(INT_MAX / 2)
-#endif
-
-static int getfield (lua_State *L, const char *key, int d, int delta) {
-  int isnum;
-  int t = lua_getfield(L, -1, key);  /* get field and its type */
-  lua_Integer res = lua_tointegerx(L, -1, &isnum);
-  if (!isnum) {  /* field is not an integer? */
-    if (t != LUA_TNIL)  /* some other value? */
-      return luaL_error(L, "field '%s' is not an integer", key);
-    else if (d < 0)  /* absent field; no default? */
-      return luaL_error(L, "field '%s' missing in date table", key);
-    res = d;
-  }
-  else {
-    if (!(-L_MAXDATEFIELD <= res && res <= L_MAXDATEFIELD))
-      return luaL_error(L, "field '%s' is out-of-bound", key);
-    res -= delta;
-  }
-  lua_pop(L, 1);
-  return (int)res;
-}
-
-
-static const char *checkoption (lua_State *L, const char *conv, char *buff) {
-  const char *option;
-  int oplen = 1;
-  for (option = LUA_STRFTIMEOPTIONS; *option != '\0'; option += oplen) {
-    if (*option == '|')  /* next block? */
-      oplen++;  /* next length */
-    else if (memcmp(conv, option, oplen) == 0) {  /* match? */
-      memcpy(buff, conv, oplen);  /* copy valid option to buffer */
-      buff[oplen] = '\0';
-      return conv + oplen;  /* return next item */
-    }
-  }
-  luaL_argerror(L, 1,
-    lua_pushfstring(L, "invalid conversion specifier '%%%s'", conv));
-  return conv;  /* to avoid warnings */
-}
-
-
-/* maximum size for an individual 'strftime' item */
-#define SIZETIMEFMT	250
-
-
-static int os_date (lua_State *L) {
-  const char *s = luaL_optstring(L, 1, "%c");
-  time_t t = luaL_opt(L, l_checktime, 2, time(NULL));
-  struct tm tmr, *stm;
-  if (*s == '!') {  /* UTC? */
-    stm = l_gmtime(&t, &tmr);
-    s++;  /* skip '!' */
-  }
-  else
-    stm = l_localtime(&t, &tmr);
-  if (stm == NULL)  /* invalid date? */
-    luaL_error(L, "time result cannot be represented in this installation");
-  if (strcmp(s, "*t") == 0) {
-    lua_createtable(L, 0, 9);  /* 9 = number of fields */
-    setallfields(L, stm);
-  }
-  else {
-    char cc[4];  /* buffer for individual conversion specifiers */
-    luaL_Buffer b;
-    cc[0] = '%';
-    luaL_buffinit(L, &b);
-    while (*s) {
-      if (*s != '%')  /* not a conversion specifier? */
-        luaL_addchar(&b, *s++);
-      else {
-        size_t reslen;
-        char *buff = luaL_prepbuffsize(&b, SIZETIMEFMT);
-        s = checkoption(L, s + 1, cc + 1);  /* copy specifier to 'cc' */
-        reslen = strftime(buff, SIZETIMEFMT, cc, stm);
-        luaL_addsize(&b, reslen);
-      }
-    }
-    luaL_pushresult(&b);
-  }
-  return 1;
-}
-
-
-static int os_time (lua_State *L) {
-  time_t t;
-  if (lua_isnoneornil(L, 1))  /* called without args? */
-    t = time(NULL);  /* get current time */
-  else {
-    struct tm ts;
-    luaL_checktype(L, 1, LUA_TTABLE);
-    lua_settop(L, 1);  /* make sure table is at the top */
-    ts.tm_sec = getfield(L, "sec", 0, 0);
-    ts.tm_min = getfield(L, "min", 0, 0);
-    ts.tm_hour = getfield(L, "hour", 12, 0);
-    ts.tm_mday = getfield(L, "day", -1, 0);
-    ts.tm_mon = getfield(L, "month", -1, 1);
-    ts.tm_year = getfield(L, "year", -1, 1900);
-    ts.tm_isdst = getboolfield(L, "isdst");
-    t = mktime(&ts);
-    setallfields(L, &ts);  /* update fields with normalized values */
-  }
-  if (t != (time_t)(l_timet)t || t == (time_t)(-1))
-    luaL_error(L, "time result cannot be represented in this installation");
-  l_pushtime(L, t);
-  return 1;
-}
-
-
-static int os_difftime (lua_State *L) {
-  time_t t1 = l_checktime(L, 1);
-  time_t t2 = l_checktime(L, 2);
-  lua_pushnumber(L, (lua_Number)difftime(t1, t2));
-  return 1;
-}
-
-/* }====================================================== */
-
-
-static int os_setlocale (lua_State *L) {
-  static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
-                      LC_NUMERIC, LC_TIME};
-  static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
-     "numeric", "time", NULL};
-  const char *l = luaL_optstring(L, 1, NULL);
-  int op = luaL_checkoption(L, 2, "all", catnames);
-  lua_pushstring(L, setlocale(cat[op], l));
-  return 1;
-}
-
-
-static int os_exit (lua_State *L) {
-  int status;
-  if (lua_isboolean(L, 1))
-    status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);
-  else
-    status = (int)luaL_optinteger(L, 1, EXIT_SUCCESS);
-  if (lua_toboolean(L, 2))
-    lua_close(L);
-  if (L) exit(status);  /* 'if' to avoid warnings for unreachable 'return' */
-  return 0;
-}
-
-
-static const luaL_Reg syslib[] = {
-  {"clock",     os_clock},
-  {"date",      os_date},
-  {"difftime",  os_difftime},
-  {"execute",   os_execute},
-  {"exit",      os_exit},
-  {"getenv",    os_getenv},
-  {"remove",    os_remove},
-  {"rename",    os_rename},
-  {"setlocale", os_setlocale},
-  {"time",      os_time},
-  {"tmpname",   os_tmpname},
-  {NULL, NULL}
-};
-
-/* }====================================================== */
-
-
-
-LUAMOD_API int luaopen_os (lua_State *L) {
-  luaL_newlib(L, syslib);
-  return 1;
-}
-
diff --git a/src/lib/lualib/lstrlib.c b/src/lib/lualib/lstrlib.c
deleted file mode 100644
index 12264f8..0000000
--- a/src/lib/lualib/lstrlib.c
+++ /dev/null
@@ -1,1582 +0,0 @@
-/*
-** $Id: lstrlib.c,v 1.251 2016/05/20 14:13:21 roberto Exp $
-** Standard library for string operations and pattern-matching
-** See Copyright Notice in lua.h
-*/
-
-#define lstrlib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <ctype.h>
-#include <float.h>
-#include <limits.h>
-#include <locale.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-/*
-** maximum number of captures that a pattern can do during
-** pattern-matching. This limit is arbitrary, but must fit in
-** an unsigned char.
-*/
-#if !defined(LUA_MAXCAPTURES)
-#define LUA_MAXCAPTURES		32
-#endif
-
-
-/* macro to 'unsign' a character */
-#define uchar(c)	((unsigned char)(c))
-
-
-/*
-** Some sizes are better limited to fit in 'int', but must also fit in
-** 'size_t'. (We assume that 'lua_Integer' cannot be smaller than 'int'.)
-*/
-#define MAX_SIZET	((size_t)(~(size_t)0))
-
-#define MAXSIZE  \
-	(sizeof(size_t) < sizeof(int) ? MAX_SIZET : (size_t)(INT_MAX))
-
-
-
-
-static int str_len (lua_State *L) {
-  size_t l;
-  luaL_checklstring(L, 1, &l);
-  lua_pushinteger(L, (lua_Integer)l);
-  return 1;
-}
-
-
-/* translate a relative string position: negative means back from end */
-static lua_Integer posrelat (lua_Integer pos, size_t len) {
-  if (pos >= 0) return pos;
-  else if (0u - (size_t)pos > len) return 0;
-  else return (lua_Integer)len + pos + 1;
-}
-
-
-static int str_sub (lua_State *L) {
-  size_t l;
-  const char *s = luaL_checklstring(L, 1, &l);
-  lua_Integer start = posrelat(luaL_checkinteger(L, 2), l);
-  lua_Integer end = posrelat(luaL_optinteger(L, 3, -1), l);
-  if (start < 1) start = 1;
-  if (end > (lua_Integer)l) end = l;
-  if (start <= end)
-    lua_pushlstring(L, s + start - 1, (size_t)(end - start) + 1);
-  else lua_pushliteral(L, "");
-  return 1;
-}
-
-
-static int str_reverse (lua_State *L) {
-  size_t l, i;
-  luaL_Buffer b;
-  const char *s = luaL_checklstring(L, 1, &l);
-  char *p = luaL_buffinitsize(L, &b, l);
-  for (i = 0; i < l; i++)
-    p[i] = s[l - i - 1];
-  luaL_pushresultsize(&b, l);
-  return 1;
-}
-
-
-static int str_lower (lua_State *L) {
-  size_t l;
-  size_t i;
-  luaL_Buffer b;
-  const char *s = luaL_checklstring(L, 1, &l);
-  char *p = luaL_buffinitsize(L, &b, l);
-  for (i=0; i<l; i++)
-    p[i] = tolower(uchar(s[i]));
-  luaL_pushresultsize(&b, l);
-  return 1;
-}
-
-
-static int str_upper (lua_State *L) {
-  size_t l;
-  size_t i;
-  luaL_Buffer b;
-  const char *s = luaL_checklstring(L, 1, &l);
-  char *p = luaL_buffinitsize(L, &b, l);
-  for (i=0; i<l; i++)
-    p[i] = toupper(uchar(s[i]));
-  luaL_pushresultsize(&b, l);
-  return 1;
-}
-
-
-static int str_rep (lua_State *L) {
-  size_t l, lsep;
-  const char *s = luaL_checklstring(L, 1, &l);
-  lua_Integer n = luaL_checkinteger(L, 2);
-  const char *sep = luaL_optlstring(L, 3, "", &lsep);
-  if (n <= 0) lua_pushliteral(L, "");
-  else if (l + lsep < l || l + lsep > MAXSIZE / n)  /* may overflow? */
-    return luaL_error(L, "resulting string too large");
-  else {
-    size_t totallen = (size_t)n * l + (size_t)(n - 1) * lsep;
-    luaL_Buffer b;
-    char *p = luaL_buffinitsize(L, &b, totallen);
-    while (n-- > 1) {  /* first n-1 copies (followed by separator) */
-      memcpy(p, s, l * sizeof(char)); p += l;
-      if (lsep > 0) {  /* empty 'memcpy' is not that cheap */
-        memcpy(p, sep, lsep * sizeof(char));
-        p += lsep;
-      }
-    }
-    memcpy(p, s, l * sizeof(char));  /* last copy (not followed by separator) */
-    luaL_pushresultsize(&b, totallen);
-  }
-  return 1;
-}
-
-
-static int str_byte (lua_State *L) {
-  size_t l;
-  const char *s = luaL_checklstring(L, 1, &l);
-  lua_Integer posi = posrelat(luaL_optinteger(L, 2, 1), l);
-  lua_Integer pose = posrelat(luaL_optinteger(L, 3, posi), l);
-  int n, i;
-  if (posi < 1) posi = 1;
-  if (pose > (lua_Integer)l) pose = l;
-  if (posi > pose) return 0;  /* empty interval; return no values */
-  if (pose - posi >= INT_MAX)  /* arithmetic overflow? */
-    return luaL_error(L, "string slice too long");
-  n = (int)(pose -  posi) + 1;
-  luaL_checkstack(L, n, "string slice too long");
-  for (i=0; i<n; i++)
-    lua_pushinteger(L, uchar(s[posi+i-1]));
-  return n;
-}
-
-
-static int str_char (lua_State *L) {
-  int n = lua_gettop(L);  /* number of arguments */
-  int i;
-  luaL_Buffer b;
-  char *p = luaL_buffinitsize(L, &b, n);
-  for (i=1; i<=n; i++) {
-    lua_Integer c = luaL_checkinteger(L, i);
-    luaL_argcheck(L, uchar(c) == c, i, "value out of range");
-    p[i - 1] = uchar(c);
-  }
-  luaL_pushresultsize(&b, n);
-  return 1;
-}
-
-
-static int writer (lua_State *L, const void *b, size_t size, void *B) {
-  (void)L;
-  luaL_addlstring((luaL_Buffer *) B, (const char *)b, size);
-  return 0;
-}
-
-
-static int str_dump (lua_State *L) {
-  luaL_Buffer b;
-  int strip = lua_toboolean(L, 2);
-  luaL_checktype(L, 1, LUA_TFUNCTION);
-  lua_settop(L, 1);
-  luaL_buffinit(L,&b);
-  if (lua_dump(L, writer, &b, strip) != 0)
-    return luaL_error(L, "unable to dump given function");
-  luaL_pushresult(&b);
-  return 1;
-}
-
-
-
-/*
-** {======================================================
-** PATTERN MATCHING
-** =======================================================
-*/
-
-
-#define CAP_UNFINISHED	(-1)
-#define CAP_POSITION	(-2)
-
-
-typedef struct MatchState {
-  const char *src_init;  /* init of source string */
-  const char *src_end;  /* end ('\0') of source string */
-  const char *p_end;  /* end ('\0') of pattern */
-  lua_State *L;
-  int matchdepth;  /* control for recursive depth (to avoid C stack overflow) */
-  unsigned char level;  /* total number of captures (finished or unfinished) */
-  struct {
-    const char *init;
-    ptrdiff_t len;
-  } capture[LUA_MAXCAPTURES];
-} MatchState;
-
-
-/* recursive function */
-static const char *match (MatchState *ms, const char *s, const char *p);
-
-
-/* maximum recursion depth for 'match' */
-#if !defined(MAXCCALLS)
-#define MAXCCALLS	200
-#endif
-
-
-#define L_ESC		'%'
-#define SPECIALS	"^$*+?.([%-"
-
-
-static int check_capture (MatchState *ms, int l) {
-  l -= '1';
-  if (l < 0 || l >= ms->level || ms->capture[l].len == CAP_UNFINISHED)
-    return luaL_error(ms->L, "invalid capture index %%%d", l + 1);
-  return l;
-}
-
-
-static int capture_to_close (MatchState *ms) {
-  int level = ms->level;
-  for (level--; level>=0; level--)
-    if (ms->capture[level].len == CAP_UNFINISHED) return level;
-  return luaL_error(ms->L, "invalid pattern capture");
-}
-
-
-static const char *classend (MatchState *ms, const char *p) {
-  switch (*p++) {
-    case L_ESC: {
-      if (p == ms->p_end)
-        luaL_error(ms->L, "malformed pattern (ends with '%%')");
-      return p+1;
-    }
-    case '[': {
-      if (*p == '^') p++;
-      do {  /* look for a ']' */
-        if (p == ms->p_end)
-          luaL_error(ms->L, "malformed pattern (missing ']')");
-        if (*(p++) == L_ESC && p < ms->p_end)
-          p++;  /* skip escapes (e.g. '%]') */
-      } while (*p != ']');
-      return p+1;
-    }
-    default: {
-      return p;
-    }
-  }
-}
-
-
-static int match_class (int c, int cl) {
-  int res;
-  switch (tolower(cl)) {
-    case 'a' : res = isalpha(c); break;
-    case 'c' : res = iscntrl(c); break;
-    case 'd' : res = isdigit(c); break;
-    case 'g' : res = isgraph(c); break;
-    case 'l' : res = islower(c); break;
-    case 'p' : res = ispunct(c); break;
-    case 's' : res = isspace(c); break;
-    case 'u' : res = isupper(c); break;
-    case 'w' : res = isalnum(c); break;
-    case 'x' : res = isxdigit(c); break;
-    case 'z' : res = (c == 0); break;  /* deprecated option */
-    default: return (cl == c);
-  }
-  return (islower(cl) ? res : !res);
-}
-
-
-static int matchbracketclass (int c, const char *p, const char *ec) {
-  int sig = 1;
-  if (*(p+1) == '^') {
-    sig = 0;
-    p++;  /* skip the '^' */
-  }
-  while (++p < ec) {
-    if (*p == L_ESC) {
-      p++;
-      if (match_class(c, uchar(*p)))
-        return sig;
-    }
-    else if ((*(p+1) == '-') && (p+2 < ec)) {
-      p+=2;
-      if (uchar(*(p-2)) <= c && c <= uchar(*p))
-        return sig;
-    }
-    else if (uchar(*p) == c) return sig;
-  }
-  return !sig;
-}
-
-
-static int singlematch (MatchState *ms, const char *s, const char *p,
-                        const char *ep) {
-  if (s >= ms->src_end)
-    return 0;
-  else {
-    int c = uchar(*s);
-    switch (*p) {
-      case '.': return 1;  /* matches any char */
-      case L_ESC: return match_class(c, uchar(*(p+1)));
-      case '[': return matchbracketclass(c, p, ep-1);
-      default:  return (uchar(*p) == c);
-    }
-  }
-}
-
-
-static const char *matchbalance (MatchState *ms, const char *s,
-                                   const char *p) {
-  if (p >= ms->p_end - 1)
-    luaL_error(ms->L, "malformed pattern (missing arguments to '%%b')");
-  if (*s != *p) return NULL;
-  else {
-    int b = *p;
-    int e = *(p+1);
-    int cont = 1;
-    while (++s < ms->src_end) {
-      if (*s == e) {
-        if (--cont == 0) return s+1;
-      }
-      else if (*s == b) cont++;
-    }
-  }
-  return NULL;  /* string ends out of balance */
-}
-
-
-static const char *max_expand (MatchState *ms, const char *s,
-                                 const char *p, const char *ep) {
-  ptrdiff_t i = 0;  /* counts maximum expand for item */
-  while (singlematch(ms, s + i, p, ep))
-    i++;
-  /* keeps trying to match with the maximum repetitions */
-  while (i>=0) {
-    const char *res = match(ms, (s+i), ep+1);
-    if (res) return res;
-    i--;  /* else didn't match; reduce 1 repetition to try again */
-  }
-  return NULL;
-}
-
-
-static const char *min_expand (MatchState *ms, const char *s,
-                                 const char *p, const char *ep) {
-  for (;;) {
-    const char *res = match(ms, s, ep+1);
-    if (res != NULL)
-      return res;
-    else if (singlematch(ms, s, p, ep))
-      s++;  /* try with one more repetition */
-    else return NULL;
-  }
-}
-
-
-static const char *start_capture (MatchState *ms, const char *s,
-                                    const char *p, int what) {
-  const char *res;
-  int level = ms->level;
-  if (level >= LUA_MAXCAPTURES) luaL_error(ms->L, "too many captures");
-  ms->capture[level].init = s;
-  ms->capture[level].len = what;
-  ms->level = level+1;
-  if ((res=match(ms, s, p)) == NULL)  /* match failed? */
-    ms->level--;  /* undo capture */
-  return res;
-}
-
-
-static const char *end_capture (MatchState *ms, const char *s,
-                                  const char *p) {
-  int l = capture_to_close(ms);
-  const char *res;
-  ms->capture[l].len = s - ms->capture[l].init;  /* close capture */
-  if ((res = match(ms, s, p)) == NULL)  /* match failed? */
-    ms->capture[l].len = CAP_UNFINISHED;  /* undo capture */
-  return res;
-}
-
-
-static const char *match_capture (MatchState *ms, const char *s, int l) {
-  size_t len;
-  l = check_capture(ms, l);
-  len = ms->capture[l].len;
-  if ((size_t)(ms->src_end-s) >= len &&
-      memcmp(ms->capture[l].init, s, len) == 0)
-    return s+len;
-  else return NULL;
-}
-
-
-static const char *match (MatchState *ms, const char *s, const char *p) {
-  if (ms->matchdepth-- == 0)
-    luaL_error(ms->L, "pattern too complex");
-  init: /* using goto's to optimize tail recursion */
-  if (p != ms->p_end) {  /* end of pattern? */
-    switch (*p) {
-      case '(': {  /* start capture */
-        if (*(p + 1) == ')')  /* position capture? */
-          s = start_capture(ms, s, p + 2, CAP_POSITION);
-        else
-          s = start_capture(ms, s, p + 1, CAP_UNFINISHED);
-        break;
-      }
-      case ')': {  /* end capture */
-        s = end_capture(ms, s, p + 1);
-        break;
-      }
-      case '$': {
-        if ((p + 1) != ms->p_end)  /* is the '$' the last char in pattern? */
-          goto dflt;  /* no; go to default */
-        s = (s == ms->src_end) ? s : NULL;  /* check end of string */
-        break;
-      }
-      case L_ESC: {  /* escaped sequences not in the format class[*+?-]? */
-        switch (*(p + 1)) {
-          case 'b': {  /* balanced string? */
-            s = matchbalance(ms, s, p + 2);
-            if (s != NULL) {
-              p += 4; goto init;  /* return match(ms, s, p + 4); */
-            }  /* else fail (s == NULL) */
-            break;
-          }
-          case 'f': {  /* frontier? */
-            const char *ep; char previous;
-            p += 2;
-            if (*p != '[')
-              luaL_error(ms->L, "missing '[' after '%%f' in pattern");
-            ep = classend(ms, p);  /* points to what is next */
-            previous = (s == ms->src_init) ? '\0' : *(s - 1);
-            if (!matchbracketclass(uchar(previous), p, ep - 1) &&
-               matchbracketclass(uchar(*s), p, ep - 1)) {
-              p = ep; goto init;  /* return match(ms, s, ep); */
-            }
-            s = NULL;  /* match failed */
-            break;
-          }
-          case '0': case '1': case '2': case '3':
-          case '4': case '5': case '6': case '7':
-          case '8': case '9': {  /* capture results (%0-%9)? */
-            s = match_capture(ms, s, uchar(*(p + 1)));
-            if (s != NULL) {
-              p += 2; goto init;  /* return match(ms, s, p + 2) */
-            }
-            break;
-          }
-          default: goto dflt;
-        }
-        break;
-      }
-      default: dflt: {  /* pattern class plus optional suffix */
-        const char *ep = classend(ms, p);  /* points to optional suffix */
-        /* does not match at least once? */
-        if (!singlematch(ms, s, p, ep)) {
-          if (*ep == '*' || *ep == '?' || *ep == '-') {  /* accept empty? */
-            p = ep + 1; goto init;  /* return match(ms, s, ep + 1); */
-          }
-          else  /* '+' or no suffix */
-            s = NULL;  /* fail */
-        }
-        else {  /* matched once */
-          switch (*ep) {  /* handle optional suffix */
-            case '?': {  /* optional */
-              const char *res;
-              if ((res = match(ms, s + 1, ep + 1)) != NULL)
-                s = res;
-              else {
-                p = ep + 1; goto init;  /* else return match(ms, s, ep + 1); */
-              }
-              break;
-            }
-            case '+':  /* 1 or more repetitions */
-              s++;  /* 1 match already done */
-              /* FALLTHROUGH */
-            case '*':  /* 0 or more repetitions */
-              s = max_expand(ms, s, p, ep);
-              break;
-            case '-':  /* 0 or more repetitions (minimum) */
-              s = min_expand(ms, s, p, ep);
-              break;
-            default:  /* no suffix */
-              s++; p = ep; goto init;  /* return match(ms, s + 1, ep); */
-          }
-        }
-        break;
-      }
-    }
-  }
-  ms->matchdepth++;
-  return s;
-}
-
-
-
-static const char *lmemfind (const char *s1, size_t l1,
-                               const char *s2, size_t l2) {
-  if (l2 == 0) return s1;  /* empty strings are everywhere */
-  else if (l2 > l1) return NULL;  /* avoids a negative 'l1' */
-  else {
-    const char *init;  /* to search for a '*s2' inside 's1' */
-    l2--;  /* 1st char will be checked by 'memchr' */
-    l1 = l1-l2;  /* 's2' cannot be found after that */
-    while (l1 > 0 && (init = (const char *)memchr(s1, *s2, l1)) != NULL) {
-      init++;   /* 1st char is already checked */
-      if (memcmp(init, s2+1, l2) == 0)
-        return init-1;
-      else {  /* correct 'l1' and 's1' to try again */
-        l1 -= init-s1;
-        s1 = init;
-      }
-    }
-    return NULL;  /* not found */
-  }
-}
-
-
-static void push_onecapture (MatchState *ms, int i, const char *s,
-                                                    const char *e) {
-  if (i >= ms->level) {
-    if (i == 0)  /* ms->level == 0, too */
-      lua_pushlstring(ms->L, s, e - s);  /* add whole match */
-    else
-      luaL_error(ms->L, "invalid capture index %%%d", i + 1);
-  }
-  else {
-    ptrdiff_t l = ms->capture[i].len;
-    if (l == CAP_UNFINISHED) luaL_error(ms->L, "unfinished capture");
-    if (l == CAP_POSITION)
-      lua_pushinteger(ms->L, (ms->capture[i].init - ms->src_init) + 1);
-    else
-      lua_pushlstring(ms->L, ms->capture[i].init, l);
-  }
-}
-
-
-static int push_captures (MatchState *ms, const char *s, const char *e) {
-  int i;
-  int nlevels = (ms->level == 0 && s) ? 1 : ms->level;
-  luaL_checkstack(ms->L, nlevels, "too many captures");
-  for (i = 0; i < nlevels; i++)
-    push_onecapture(ms, i, s, e);
-  return nlevels;  /* number of strings pushed */
-}
-
-
-/* check whether pattern has no special characters */
-static int nospecials (const char *p, size_t l) {
-  size_t upto = 0;
-  do {
-    if (strpbrk(p + upto, SPECIALS))
-      return 0;  /* pattern has a special character */
-    upto += strlen(p + upto) + 1;  /* may have more after \0 */
-  } while (upto <= l);
-  return 1;  /* no special chars found */
-}
-
-
-static void prepstate (MatchState *ms, lua_State *L,
-                       const char *s, size_t ls, const char *p, size_t lp) {
-  ms->L = L;
-  ms->matchdepth = MAXCCALLS;
-  ms->src_init = s;
-  ms->src_end = s + ls;
-  ms->p_end = p + lp;
-}
-
-
-static void reprepstate (MatchState *ms) {
-  ms->level = 0;
-  lua_assert(ms->matchdepth == MAXCCALLS);
-}
-
-
-static int str_find_aux (lua_State *L, int find) {
-  size_t ls, lp;
-  const char *s = luaL_checklstring(L, 1, &ls);
-  const char *p = luaL_checklstring(L, 2, &lp);
-  lua_Integer init = posrelat(luaL_optinteger(L, 3, 1), ls);
-  if (init < 1) init = 1;
-  else if (init > (lua_Integer)ls + 1) {  /* start after string's end? */
-    lua_pushnil(L);  /* cannot find anything */
-    return 1;
-  }
-  /* explicit request or no special characters? */
-  if (find && (lua_toboolean(L, 4) || nospecials(p, lp))) {
-    /* do a plain search */
-    const char *s2 = lmemfind(s + init - 1, ls - (size_t)init + 1, p, lp);
-    if (s2) {
-      lua_pushinteger(L, (s2 - s) + 1);
-      lua_pushinteger(L, (s2 - s) + lp);
-      return 2;
-    }
-  }
-  else {
-    MatchState ms;
-    const char *s1 = s + init - 1;
-    int anchor = (*p == '^');
-    if (anchor) {
-      p++; lp--;  /* skip anchor character */
-    }
-    prepstate(&ms, L, s, ls, p, lp);
-    do {
-      const char *res;
-      reprepstate(&ms);
-      if ((res=match(&ms, s1, p)) != NULL) {
-        if (find) {
-          lua_pushinteger(L, (s1 - s) + 1);  /* start */
-          lua_pushinteger(L, res - s);   /* end */
-          return push_captures(&ms, NULL, 0) + 2;
-        }
-        else
-          return push_captures(&ms, s1, res);
-      }
-    } while (s1++ < ms.src_end && !anchor);
-  }
-  lua_pushnil(L);  /* not found */
-  return 1;
-}
-
-
-static int str_find (lua_State *L) {
-  return str_find_aux(L, 1);
-}
-
-
-static int str_match (lua_State *L) {
-  return str_find_aux(L, 0);
-}
-
-
-/* state for 'gmatch' */
-typedef struct GMatchState {
-  const char *src;  /* current position */
-  const char *p;  /* pattern */
-  const char *lastmatch;  /* end of last match */
-  MatchState ms;  /* match state */
-} GMatchState;
-
-
-static int gmatch_aux (lua_State *L) {
-  GMatchState *gm = (GMatchState *)lua_touserdata(L, lua_upvalueindex(3));
-  const char *src;
-  gm->ms.L = L;
-  for (src = gm->src; src <= gm->ms.src_end; src++) {
-    const char *e;
-    reprepstate(&gm->ms);
-    if ((e = match(&gm->ms, src, gm->p)) != NULL && e != gm->lastmatch) {
-      gm->src = gm->lastmatch = e;
-      return push_captures(&gm->ms, src, e);
-    }
-  }
-  return 0;  /* not found */
-}
-
-
-static int gmatch (lua_State *L) {
-  size_t ls, lp;
-  const char *s = luaL_checklstring(L, 1, &ls);
-  const char *p = luaL_checklstring(L, 2, &lp);
-  GMatchState *gm;
-  lua_settop(L, 2);  /* keep them on closure to avoid being collected */
-  gm = (GMatchState *)lua_newuserdata(L, sizeof(GMatchState));
-  prepstate(&gm->ms, L, s, ls, p, lp);
-  gm->src = s; gm->p = p; gm->lastmatch = NULL;
-  lua_pushcclosure(L, gmatch_aux, 3);
-  return 1;
-}
-
-
-static void add_s (MatchState *ms, luaL_Buffer *b, const char *s,
-                                                   const char *e) {
-  size_t l, i;
-  lua_State *L = ms->L;
-  const char *news = lua_tolstring(L, 3, &l);
-  for (i = 0; i < l; i++) {
-    if (news[i] != L_ESC)
-      luaL_addchar(b, news[i]);
-    else {
-      i++;  /* skip ESC */
-      if (!isdigit(uchar(news[i]))) {
-        if (news[i] != L_ESC)
-          luaL_error(L, "invalid use of '%c' in replacement string", L_ESC);
-        luaL_addchar(b, news[i]);
-      }
-      else if (news[i] == '0')
-          luaL_addlstring(b, s, e - s);
-      else {
-        push_onecapture(ms, news[i] - '1', s, e);
-        luaL_tolstring(L, -1, NULL);  /* if number, convert it to string */
-        lua_remove(L, -2);  /* remove original value */
-        luaL_addvalue(b);  /* add capture to accumulated result */
-      }
-    }
-  }
-}
-
-
-static void add_value (MatchState *ms, luaL_Buffer *b, const char *s,
-                                       const char *e, int tr) {
-  lua_State *L = ms->L;
-  switch (tr) {
-    case LUA_TFUNCTION: {
-      int n;
-      lua_pushvalue(L, 3);
-      n = push_captures(ms, s, e);
-      lua_call(L, n, 1);
-      break;
-    }
-    case LUA_TTABLE: {
-      push_onecapture(ms, 0, s, e);
-      lua_gettable(L, 3);
-      break;
-    }
-    default: {  /* LUA_TNUMBER or LUA_TSTRING */
-      add_s(ms, b, s, e);
-      return;
-    }
-  }
-  if (!lua_toboolean(L, -1)) {  /* nil or false? */
-    lua_pop(L, 1);
-    lua_pushlstring(L, s, e - s);  /* keep original text */
-  }
-  else if (!lua_isstring(L, -1))
-    luaL_error(L, "invalid replacement value (a %s)", luaL_typename(L, -1));
-  luaL_addvalue(b);  /* add result to accumulator */
-}
-
-
-static int str_gsub (lua_State *L) {
-  size_t srcl, lp;
-  const char *src = luaL_checklstring(L, 1, &srcl);  /* subject */
-  const char *p = luaL_checklstring(L, 2, &lp);  /* pattern */
-  const char *lastmatch = NULL;  /* end of last match */
-  int tr = lua_type(L, 3);  /* replacement type */
-  lua_Integer max_s = luaL_optinteger(L, 4, srcl + 1);  /* max replacements */
-  int anchor = (*p == '^');
-  lua_Integer n = 0;  /* replacement count */
-  MatchState ms;
-  luaL_Buffer b;
-  luaL_argcheck(L, tr == LUA_TNUMBER || tr == LUA_TSTRING ||
-                   tr == LUA_TFUNCTION || tr == LUA_TTABLE, 3,
-                      "string/function/table expected");
-  luaL_buffinit(L, &b);
-  if (anchor) {
-    p++; lp--;  /* skip anchor character */
-  }
-  prepstate(&ms, L, src, srcl, p, lp);
-  while (n < max_s) {
-    const char *e;
-    reprepstate(&ms);  /* (re)prepare state for new match */
-    if ((e = match(&ms, src, p)) != NULL && e != lastmatch) {  /* match? */
-      n++;
-      add_value(&ms, &b, src, e, tr);  /* add replacement to buffer */
-      src = lastmatch = e;
-    }
-    else if (src < ms.src_end)  /* otherwise, skip one character */
-      luaL_addchar(&b, *src++);
-    else break;  /* end of subject */
-    if (anchor) break;
-  }
-  luaL_addlstring(&b, src, ms.src_end-src);
-  luaL_pushresult(&b);
-  lua_pushinteger(L, n);  /* number of substitutions */
-  return 2;
-}
-
-/* }====================================================== */
-
-
-
-/*
-** {======================================================
-** STRING FORMAT
-** =======================================================
-*/
-
-#if !defined(lua_number2strx)	/* { */
-
-/*
-** Hexadecimal floating-point formatter
-*/
-
-#include <math.h>
-
-#define SIZELENMOD	(sizeof(LUA_NUMBER_FRMLEN)/sizeof(char))
-
-
-/*
-** Number of bits that goes into the first digit. It can be any value
-** between 1 and 4; the following definition tries to align the number
-** to nibble boundaries by making what is left after that first digit a
-** multiple of 4.
-*/
-#define L_NBFD		((l_mathlim(MANT_DIG) - 1)%4 + 1)
-
-
-/*
-** Add integer part of 'x' to buffer and return new 'x'
-*/
-static lua_Number adddigit (char *buff, int n, lua_Number x) {
-  lua_Number dd = l_mathop(floor)(x);  /* get integer part from 'x' */
-  int d = (int)dd;
-  buff[n] = (d < 10 ? d + '0' : d - 10 + 'a');  /* add to buffer */
-  return x - dd;  /* return what is left */
-}
-
-
-static int num2straux (char *buff, int sz, lua_Number x) {
-  if (x != x || x == HUGE_VAL || x == -HUGE_VAL)  /* inf or NaN? */
-    return l_sprintf(buff, sz, LUA_NUMBER_FMT, x);  /* equal to '%g' */
-  else if (x == 0) {  /* can be -0... */
-    /* create "0" or "-0" followed by exponent */
-    return l_sprintf(buff, sz, LUA_NUMBER_FMT "x0p+0", x);
-  }
-  else {
-    int e;
-    lua_Number m = l_mathop(frexp)(x, &e);  /* 'x' fraction and exponent */
-    int n = 0;  /* character count */
-    if (m < 0) {  /* is number negative? */
-      buff[n++] = '-';  /* add signal */
-      m = -m;  /* make it positive */
-    }
-    buff[n++] = '0'; buff[n++] = 'x';  /* add "0x" */
-    m = adddigit(buff, n++, m * (1 << L_NBFD));  /* add first digit */
-    e -= L_NBFD;  /* this digit goes before the radix point */
-    if (m > 0) {  /* more digits? */
-      buff[n++] = lua_getlocaledecpoint();  /* add radix point */
-      do {  /* add as many digits as needed */
-        m = adddigit(buff, n++, m * 16);
-      } while (m > 0);
-    }
-    n += l_sprintf(buff + n, sz - n, "p%+d", e);  /* add exponent */
-    lua_assert(n < sz);
-    return n;
-  }
-}
-
-
-static int lua_number2strx (lua_State *L, char *buff, int sz,
-                            const char *fmt, lua_Number x) {
-  int n = num2straux(buff, sz, x);
-  if (fmt[SIZELENMOD] == 'A') {
-    int i;
-    for (i = 0; i < n; i++)
-      buff[i] = toupper(uchar(buff[i]));
-  }
-  else if (fmt[SIZELENMOD] != 'a')
-    luaL_error(L, "modifiers for format '%%a'/'%%A' not implemented");
-  return n;
-}
-
-#endif				/* } */
-
-
-/*
-** Maximum size of each formatted item. This maximum size is produced
-** by format('%.99f', -maxfloat), and is equal to 99 + 3 ('-', '.',
-** and '\0') + number of decimal digits to represent maxfloat (which
-** is maximum exponent + 1). (99+3+1 then rounded to 120 for "extra
-** expenses", such as locale-dependent stuff)
-*/
-#define MAX_ITEM        (120 + l_mathlim(MAX_10_EXP))
-
-
-/* valid flags in a format specification */
-#define FLAGS	"-+ #0"
-
-/*
-** maximum size of each format specification (such as "%-099.99d")
-*/
-#define MAX_FORMAT	32
-
-
-static void addquoted (luaL_Buffer *b, const char *s, size_t len) {
-  luaL_addchar(b, '"');
-  while (len--) {
-    if (*s == '"' || *s == '\\' || *s == '\n') {
-      luaL_addchar(b, '\\');
-      luaL_addchar(b, *s);
-    }
-    else if (iscntrl(uchar(*s))) {
-      char buff[10];
-      if (!isdigit(uchar(*(s+1))))
-        l_sprintf(buff, sizeof(buff), "\\%d", (int)uchar(*s));
-      else
-        l_sprintf(buff, sizeof(buff), "\\%03d", (int)uchar(*s));
-      luaL_addstring(b, buff);
-    }
-    else
-      luaL_addchar(b, *s);
-    s++;
-  }
-  luaL_addchar(b, '"');
-}
-
-
-/*
-** Ensures the 'buff' string uses a dot as the radix character.
-*/
-static void checkdp (char *buff, int nb) {
-  if (memchr(buff, '.', nb) == NULL) {  /* no dot? */
-    char point = lua_getlocaledecpoint();  /* try locale point */
-    char *ppoint = memchr(buff, point, nb);
-    if (ppoint) *ppoint = '.';  /* change it to a dot */
-  }
-}
-
-
-static void addliteral (lua_State *L, luaL_Buffer *b, int arg) {
-  switch (lua_type(L, arg)) {
-    case LUA_TSTRING: {
-      size_t len;
-      const char *s = lua_tolstring(L, arg, &len);
-      addquoted(b, s, len);
-      break;
-    }
-    case LUA_TNUMBER: {
-      char *buff = luaL_prepbuffsize(b, MAX_ITEM);
-      int nb;
-      if (!lua_isinteger(L, arg)) {  /* float? */
-        lua_Number n = lua_tonumber(L, arg);  /* write as hexa ('%a') */
-        nb = lua_number2strx(L, buff, MAX_ITEM, "%" LUA_NUMBER_FRMLEN "a", n);
-        checkdp(buff, nb);  /* ensure it uses a dot */
-      }
-      else {  /* integers */
-        lua_Integer n = lua_tointeger(L, arg);
-        const char *format = (n == LUA_MININTEGER)  /* corner case? */
-                           ? "0x%" LUA_INTEGER_FRMLEN "x"  /* use hexa */
-                           : LUA_INTEGER_FMT;  /* else use default format */
-        nb = l_sprintf(buff, MAX_ITEM, format, n);
-      }
-      luaL_addsize(b, nb);
-      break;
-    }
-    case LUA_TNIL: case LUA_TBOOLEAN: {
-      luaL_tolstring(L, arg, NULL);
-      luaL_addvalue(b);
-      break;
-    }
-    default: {
-      luaL_argerror(L, arg, "value has no literal form");
-    }
-  }
-}
-
-
-static const char *scanformat (lua_State *L, const char *strfrmt, char *form) {
-  const char *p = strfrmt;
-  while (*p != '\0' && strchr(FLAGS, *p) != NULL) p++;  /* skip flags */
-  if ((size_t)(p - strfrmt) >= sizeof(FLAGS)/sizeof(char))
-    luaL_error(L, "invalid format (repeated flags)");
-  if (isdigit(uchar(*p))) p++;  /* skip width */
-  if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */
-  if (*p == '.') {
-    p++;
-    if (isdigit(uchar(*p))) p++;  /* skip precision */
-    if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */
-  }
-  if (isdigit(uchar(*p)))
-    luaL_error(L, "invalid format (width or precision too long)");
-  *(form++) = '%';
-  memcpy(form, strfrmt, ((p - strfrmt) + 1) * sizeof(char));
-  form += (p - strfrmt) + 1;
-  *form = '\0';
-  return p;
-}
-
-
-/*
-** add length modifier into formats
-*/
-static void addlenmod (char *form, const char *lenmod) {
-  size_t l = strlen(form);
-  size_t lm = strlen(lenmod);
-  char spec = form[l - 1];
-  strcpy(form + l - 1, lenmod);
-  form[l + lm - 1] = spec;
-  form[l + lm] = '\0';
-}
-
-
-static int str_format (lua_State *L) {
-  int top = lua_gettop(L);
-  int arg = 1;
-  size_t sfl;
-  const char *strfrmt = luaL_checklstring(L, arg, &sfl);
-  const char *strfrmt_end = strfrmt+sfl;
-  luaL_Buffer b;
-  luaL_buffinit(L, &b);
-  while (strfrmt < strfrmt_end) {
-    if (*strfrmt != L_ESC)
-      luaL_addchar(&b, *strfrmt++);
-    else if (*++strfrmt == L_ESC)
-      luaL_addchar(&b, *strfrmt++);  /* %% */
-    else { /* format item */
-      char form[MAX_FORMAT];  /* to store the format ('%...') */
-      char *buff = luaL_prepbuffsize(&b, MAX_ITEM);  /* to put formatted item */
-      int nb = 0;  /* number of bytes in added item */
-      if (++arg > top)
-        luaL_argerror(L, arg, "no value");
-      strfrmt = scanformat(L, strfrmt, form);
-      switch (*strfrmt++) {
-        case 'c': {
-          nb = l_sprintf(buff, MAX_ITEM, form, (int)luaL_checkinteger(L, arg));
-          break;
-        }
-        case 'd': case 'i':
-        case 'o': case 'u': case 'x': case 'X': {
-          lua_Integer n = luaL_checkinteger(L, arg);
-          addlenmod(form, LUA_INTEGER_FRMLEN);
-          nb = l_sprintf(buff, MAX_ITEM, form, n);
-          break;
-        }
-        case 'a': case 'A':
-          addlenmod(form, LUA_NUMBER_FRMLEN);
-          nb = lua_number2strx(L, buff, MAX_ITEM, form,
-                                  luaL_checknumber(L, arg));
-          break;
-        case 'e': case 'E': case 'f':
-        case 'g': case 'G': {
-          addlenmod(form, LUA_NUMBER_FRMLEN);
-          nb = l_sprintf(buff, MAX_ITEM, form, luaL_checknumber(L, arg));
-          break;
-        }
-        case 'q': {
-          addliteral(L, &b, arg);
-          break;
-        }
-        case 's': {
-          size_t l;
-          const char *s = luaL_tolstring(L, arg, &l);
-          if (form[2] == '\0')  /* no modifiers? */
-            luaL_addvalue(&b);  /* keep entire string */
-          else {
-            luaL_argcheck(L, l == strlen(s), arg, "string contains zeros");
-            if (!strchr(form, '.') && l >= 100) {
-              /* no precision and string is too long to be formatted */
-              luaL_addvalue(&b);  /* keep entire string */
-            }
-            else {  /* format the string into 'buff' */
-              nb = l_sprintf(buff, MAX_ITEM, form, s);
-              lua_pop(L, 1);  /* remove result from 'luaL_tolstring' */
-            }
-          }
-          break;
-        }
-        default: {  /* also treat cases 'pnLlh' */
-          return luaL_error(L, "invalid option '%%%c' to 'format'",
-                               *(strfrmt - 1));
-        }
-      }
-      lua_assert(nb < MAX_ITEM);
-      luaL_addsize(&b, nb);
-    }
-  }
-  luaL_pushresult(&b);
-  return 1;
-}
-
-/* }====================================================== */
-
-
-/*
-** {======================================================
-** PACK/UNPACK
-** =======================================================
-*/
-
-
-/* value used for padding */
-#if !defined(LUAL_PACKPADBYTE)
-#define LUAL_PACKPADBYTE		0x00
-#endif
-
-/* maximum size for the binary representation of an integer */
-#define MAXINTSIZE	16
-
-/* number of bits in a character */
-#define NB	CHAR_BIT
-
-/* mask for one character (NB 1's) */
-#define MC	((1 << NB) - 1)
-
-/* size of a lua_Integer */
-#define SZINT	((int)sizeof(lua_Integer))
-
-
-/* dummy union to get native endianness */
-static const union {
-  int dummy;
-  char little;  /* true iff machine is little endian */
-} nativeendian = {1};
-
-
-/* dummy structure to get native alignment requirements */
-struct cD {
-  char c;
-  union { double d; void *p; lua_Integer i; lua_Number n; } u;
-};
-
-#define MAXALIGN	(offsetof(struct cD, u))
-
-
-/*
-** Union for serializing floats
-*/
-typedef union Ftypes {
-  float f;
-  double d;
-  lua_Number n;
-  char buff[5 * sizeof(lua_Number)];  /* enough for any float type */
-} Ftypes;
-
-
-/*
-** information to pack/unpack stuff
-*/
-typedef struct Header {
-  lua_State *L;
-  int islittle;
-  int maxalign;
-} Header;
-
-
-/*
-** options for pack/unpack
-*/
-typedef enum KOption {
-  Kint,		/* signed integers */
-  Kuint,	/* unsigned integers */
-  Kfloat,	/* floating-point numbers */
-  Kchar,	/* fixed-length strings */
-  Kstring,	/* strings with prefixed length */
-  Kzstr,	/* zero-terminated strings */
-  Kpadding,	/* padding */
-  Kpaddalign,	/* padding for alignment */
-  Knop		/* no-op (configuration or spaces) */
-} KOption;
-
-
-/*
-** Read an integer numeral from string 'fmt' or return 'df' if
-** there is no numeral
-*/
-static int digit (int c) { return '0' <= c && c <= '9'; }
-
-static int getnum (const char **fmt, int df) {
-  if (!digit(**fmt))  /* no number? */
-    return df;  /* return default value */
-  else {
-    int a = 0;
-    do {
-      a = a*10 + (*((*fmt)++) - '0');
-    } while (digit(**fmt) && a <= ((int)MAXSIZE - 9)/10);
-    return a;
-  }
-}
-
-
-/*
-** Read an integer numeral and raises an error if it is larger
-** than the maximum size for integers.
-*/
-static int getnumlimit (Header *h, const char **fmt, int df) {
-  int sz = getnum(fmt, df);
-  if (sz > MAXINTSIZE || sz <= 0)
-    luaL_error(h->L, "integral size (%d) out of limits [1,%d]",
-                     sz, MAXINTSIZE);
-  return sz;
-}
-
-
-/*
-** Initialize Header
-*/
-static void initheader (lua_State *L, Header *h) {
-  h->L = L;
-  h->islittle = nativeendian.little;
-  h->maxalign = 1;
-}
-
-
-/*
-** Read and classify next option. 'size' is filled with option's size.
-*/
-static KOption getoption (Header *h, const char **fmt, int *size) {
-  int opt = *((*fmt)++);
-  *size = 0;  /* default */
-  switch (opt) {
-    case 'b': *size = sizeof(char); return Kint;
-    case 'B': *size = sizeof(char); return Kuint;
-    case 'h': *size = sizeof(short); return Kint;
-    case 'H': *size = sizeof(short); return Kuint;
-    case 'l': *size = sizeof(long); return Kint;
-    case 'L': *size = sizeof(long); return Kuint;
-    case 'j': *size = sizeof(lua_Integer); return Kint;
-    case 'J': *size = sizeof(lua_Integer); return Kuint;
-    case 'T': *size = sizeof(size_t); return Kuint;
-    case 'f': *size = sizeof(float); return Kfloat;
-    case 'd': *size = sizeof(double); return Kfloat;
-    case 'n': *size = sizeof(lua_Number); return Kfloat;
-    case 'i': *size = getnumlimit(h, fmt, sizeof(int)); return Kint;
-    case 'I': *size = getnumlimit(h, fmt, sizeof(int)); return Kuint;
-    case 's': *size = getnumlimit(h, fmt, sizeof(size_t)); return Kstring;
-    case 'c':
-      *size = getnum(fmt, -1);
-      if (*size == -1)
-        luaL_error(h->L, "missing size for format option 'c'");
-      return Kchar;
-    case 'z': return Kzstr;
-    case 'x': *size = 1; return Kpadding;
-    case 'X': return Kpaddalign;
-    case ' ': break;
-    case '<': h->islittle = 1; break;
-    case '>': h->islittle = 0; break;
-    case '=': h->islittle = nativeendian.little; break;
-    case '!': h->maxalign = getnumlimit(h, fmt, MAXALIGN); break;
-    default: luaL_error(h->L, "invalid format option '%c'", opt);
-  }
-  return Knop;
-}
-
-
-/*
-** Read, classify, and fill other details about the next option.
-** 'psize' is filled with option's size, 'notoalign' with its
-** alignment requirements.
-** Local variable 'size' gets the size to be aligned. (Kpadal option
-** always gets its full alignment, other options are limited by 
-** the maximum alignment ('maxalign'). Kchar option needs no alignment
-** despite its size.
-*/
-static KOption getdetails (Header *h, size_t totalsize,
-                           const char **fmt, int *psize, int *ntoalign) {
-  KOption opt = getoption(h, fmt, psize);
-  int align = *psize;  /* usually, alignment follows size */
-  if (opt == Kpaddalign) {  /* 'X' gets alignment from following option */
-    if (**fmt == '\0' || getoption(h, fmt, &align) == Kchar || align == 0)
-      luaL_argerror(h->L, 1, "invalid next option for option 'X'");
-  }
-  if (align <= 1 || opt == Kchar)  /* need no alignment? */
-    *ntoalign = 0;
-  else {
-    if (align > h->maxalign)  /* enforce maximum alignment */
-      align = h->maxalign;
-    if ((align & (align - 1)) != 0)  /* is 'align' not a power of 2? */
-      luaL_argerror(h->L, 1, "format asks for alignment not power of 2");
-    *ntoalign = (align - (int)(totalsize & (align - 1))) & (align - 1);
-  }
-  return opt;
-}
-
-
-/*
-** Pack integer 'n' with 'size' bytes and 'islittle' endianness.
-** The final 'if' handles the case when 'size' is larger than
-** the size of a Lua integer, correcting the extra sign-extension
-** bytes if necessary (by default they would be zeros).
-*/
-static void packint (luaL_Buffer *b, lua_Unsigned n,
-                     int islittle, int size, int neg) {
-  char *buff = luaL_prepbuffsize(b, size);
-  int i;
-  buff[islittle ? 0 : size - 1] = (char)(n & MC);  /* first byte */
-  for (i = 1; i < size; i++) {
-    n >>= NB;
-    buff[islittle ? i : size - 1 - i] = (char)(n & MC);
-  }
-  if (neg && size > SZINT) {  /* negative number need sign extension? */
-    for (i = SZINT; i < size; i++)  /* correct extra bytes */
-      buff[islittle ? i : size - 1 - i] = (char)MC;
-  }
-  luaL_addsize(b, size);  /* add result to buffer */
-}
-
-
-/*
-** Copy 'size' bytes from 'src' to 'dest', correcting endianness if
-** given 'islittle' is different from native endianness.
-*/
-static void copywithendian (volatile char *dest, volatile const char *src,
-                            int size, int islittle) {
-  if (islittle == nativeendian.little) {
-    while (size-- != 0)
-      *(dest++) = *(src++);
-  }
-  else {
-    dest += size - 1;
-    while (size-- != 0)
-      *(dest--) = *(src++);
-  }
-}
-
-
-static int str_pack (lua_State *L) {
-  luaL_Buffer b;
-  Header h;
-  const char *fmt = luaL_checkstring(L, 1);  /* format string */
-  int arg = 1;  /* current argument to pack */
-  size_t totalsize = 0;  /* accumulate total size of result */
-  initheader(L, &h);
-  lua_pushnil(L);  /* mark to separate arguments from string buffer */
-  luaL_buffinit(L, &b);
-  while (*fmt != '\0') {
-    int size, ntoalign;
-    KOption opt = getdetails(&h, totalsize, &fmt, &size, &ntoalign);
-    totalsize += ntoalign + size;
-    while (ntoalign-- > 0)
-     luaL_addchar(&b, LUAL_PACKPADBYTE);  /* fill alignment */
-    arg++;
-    switch (opt) {
-      case Kint: {  /* signed integers */
-        lua_Integer n = luaL_checkinteger(L, arg);
-        if (size < SZINT) {  /* need overflow check? */
-          lua_Integer lim = (lua_Integer)1 << ((size * NB) - 1);
-          luaL_argcheck(L, -lim <= n && n < lim, arg, "integer overflow");
-        }
-        packint(&b, (lua_Unsigned)n, h.islittle, size, (n < 0));
-        break;
-      }
-      case Kuint: {  /* unsigned integers */
-        lua_Integer n = luaL_checkinteger(L, arg);
-        if (size < SZINT)  /* need overflow check? */
-          luaL_argcheck(L, (lua_Unsigned)n < ((lua_Unsigned)1 << (size * NB)),
-                           arg, "unsigned overflow");
-        packint(&b, (lua_Unsigned)n, h.islittle, size, 0);
-        break;
-      }
-      case Kfloat: {  /* floating-point options */
-        volatile Ftypes u;
-        char *buff = luaL_prepbuffsize(&b, size);
-        lua_Number n = luaL_checknumber(L, arg);  /* get argument */
-        if (size == sizeof(u.f)) u.f = (float)n;  /* copy it into 'u' */
-        else if (size == sizeof(u.d)) u.d = (double)n;
-        else u.n = n;
-        /* move 'u' to final result, correcting endianness if needed */
-        copywithendian(buff, u.buff, size, h.islittle);
-        luaL_addsize(&b, size);
-        break;
-      }
-      case Kchar: {  /* fixed-size string */
-        size_t len;
-        const char *s = luaL_checklstring(L, arg, &len);
-        luaL_argcheck(L, len <= (size_t)size, arg,
-                         "string longer than given size");
-        luaL_addlstring(&b, s, len);  /* add string */
-        while (len++ < (size_t)size)  /* pad extra space */
-          luaL_addchar(&b, LUAL_PACKPADBYTE);
-        break;
-      }
-      case Kstring: {  /* strings with length count */
-        size_t len;
-        const char *s = luaL_checklstring(L, arg, &len);
-        luaL_argcheck(L, size >= (int)sizeof(size_t) ||
-                         len < ((size_t)1 << (size * NB)),
-                         arg, "string length does not fit in given size");
-        packint(&b, (lua_Unsigned)len, h.islittle, size, 0);  /* pack length */
-        luaL_addlstring(&b, s, len);
-        totalsize += len;
-        break;
-      }
-      case Kzstr: {  /* zero-terminated string */
-        size_t len;
-        const char *s = luaL_checklstring(L, arg, &len);
-        luaL_argcheck(L, strlen(s) == len, arg, "string contains zeros");
-        luaL_addlstring(&b, s, len);
-        luaL_addchar(&b, '\0');  /* add zero at the end */
-        totalsize += len + 1;
-        break;
-      }
-      case Kpadding: luaL_addchar(&b, LUAL_PACKPADBYTE);  /* FALLTHROUGH */
-      case Kpaddalign: case Knop:
-        arg--;  /* undo increment */
-        break;
-    }
-  }
-  luaL_pushresult(&b);
-  return 1;
-}
-
-
-static int str_packsize (lua_State *L) {
-  Header h;
-  const char *fmt = luaL_checkstring(L, 1);  /* format string */
-  size_t totalsize = 0;  /* accumulate total size of result */
-  initheader(L, &h);
-  while (*fmt != '\0') {
-    int size, ntoalign;
-    KOption opt = getdetails(&h, totalsize, &fmt, &size, &ntoalign);
-    size += ntoalign;  /* total space used by option */
-    luaL_argcheck(L, totalsize <= MAXSIZE - size, 1,
-                     "format result too large");
-    totalsize += size;
-    switch (opt) {
-      case Kstring:  /* strings with length count */
-      case Kzstr:    /* zero-terminated string */
-        luaL_argerror(L, 1, "variable-length format");
-        /* call never return, but to avoid warnings: *//* FALLTHROUGH */
-      default:  break;
-    }
-  }
-  lua_pushinteger(L, (lua_Integer)totalsize);
-  return 1;
-}
-
-
-/*
-** Unpack an integer with 'size' bytes and 'islittle' endianness.
-** If size is smaller than the size of a Lua integer and integer
-** is signed, must do sign extension (propagating the sign to the
-** higher bits); if size is larger than the size of a Lua integer,
-** it must check the unread bytes to see whether they do not cause an
-** overflow.
-*/
-static lua_Integer unpackint (lua_State *L, const char *str,
-                              int islittle, int size, int issigned) {
-  lua_Unsigned res = 0;
-  int i;
-  int limit = (size  <= SZINT) ? size : SZINT;
-  for (i = limit - 1; i >= 0; i--) {
-    res <<= NB;
-    res |= (lua_Unsigned)(unsigned char)str[islittle ? i : size - 1 - i];
-  }
-  if (size < SZINT) {  /* real size smaller than lua_Integer? */
-    if (issigned) {  /* needs sign extension? */
-      lua_Unsigned mask = (lua_Unsigned)1 << (size*NB - 1);
-      res = ((res ^ mask) - mask);  /* do sign extension */
-    }
-  }
-  else if (size > SZINT) {  /* must check unread bytes */
-    int mask = (!issigned || (lua_Integer)res >= 0) ? 0 : MC;
-    for (i = limit; i < size; i++) {
-      if ((unsigned char)str[islittle ? i : size - 1 - i] != mask)
-        luaL_error(L, "%d-byte integer does not fit into Lua Integer", size);
-    }
-  }
-  return (lua_Integer)res;
-}
-
-
-static int str_unpack (lua_State *L) {
-  Header h;
-  const char *fmt = luaL_checkstring(L, 1);
-  size_t ld;
-  const char *data = luaL_checklstring(L, 2, &ld);
-  size_t pos = (size_t)posrelat(luaL_optinteger(L, 3, 1), ld) - 1;
-  int n = 0;  /* number of results */
-  luaL_argcheck(L, pos <= ld, 3, "initial position out of string");
-  initheader(L, &h);
-  while (*fmt != '\0') {
-    int size, ntoalign;
-    KOption opt = getdetails(&h, pos, &fmt, &size, &ntoalign);
-    if ((size_t)ntoalign + size > ~pos || pos + ntoalign + size > ld)
-      luaL_argerror(L, 2, "data string too short");
-    pos += ntoalign;  /* skip alignment */
-    /* stack space for item + next position */
-    luaL_checkstack(L, 2, "too many results");
-    n++;
-    switch (opt) {
-      case Kint:
-      case Kuint: {
-        lua_Integer res = unpackint(L, data + pos, h.islittle, size,
-                                       (opt == Kint));
-        lua_pushinteger(L, res);
-        break;
-      }
-      case Kfloat: {
-        volatile Ftypes u;
-        lua_Number num;
-        copywithendian(u.buff, data + pos, size, h.islittle);
-        if (size == sizeof(u.f)) num = (lua_Number)u.f;
-        else if (size == sizeof(u.d)) num = (lua_Number)u.d;
-        else num = u.n;
-        lua_pushnumber(L, num);
-        break;
-      }
-      case Kchar: {
-        lua_pushlstring(L, data + pos, size);
-        break;
-      }
-      case Kstring: {
-        size_t len = (size_t)unpackint(L, data + pos, h.islittle, size, 0);
-        luaL_argcheck(L, pos + len + size <= ld, 2, "data string too short");
-        lua_pushlstring(L, data + pos + size, len);
-        pos += len;  /* skip string */
-        break;
-      }
-      case Kzstr: {
-        size_t len = (int)strlen(data + pos);
-        lua_pushlstring(L, data + pos, len);
-        pos += len + 1;  /* skip string plus final '\0' */
-        break;
-      }
-      case Kpaddalign: case Kpadding: case Knop:
-        n--;  /* undo increment */
-        break;
-    }
-    pos += size;
-  }
-  lua_pushinteger(L, pos + 1);  /* next position */
-  return n + 1;
-}
-
-/* }====================================================== */
-
-
-static const luaL_Reg strlib[] = {
-  {"byte", str_byte},
-  {"char", str_char},
-  {"dump", str_dump},
-  {"find", str_find},
-  {"format", str_format},
-  {"gmatch", gmatch},
-  {"gsub", str_gsub},
-  {"len", str_len},
-  {"lower", str_lower},
-  {"match", str_match},
-  {"rep", str_rep},
-  {"reverse", str_reverse},
-  {"sub", str_sub},
-  {"upper", str_upper},
-  {"pack", str_pack},
-  {"packsize", str_packsize},
-  {"unpack", str_unpack},
-  {NULL, NULL}
-};
-
-
-static void createmetatable (lua_State *L) {
-  lua_createtable(L, 0, 1);  /* table to be metatable for strings */
-  lua_pushliteral(L, "");  /* dummy string */
-  lua_pushvalue(L, -2);  /* copy table */
-  lua_setmetatable(L, -2);  /* set table as metatable for strings */
-  lua_pop(L, 1);  /* pop dummy string */
-  lua_pushvalue(L, -2);  /* get string library */
-  lua_setfield(L, -2, "__index");  /* metatable.__index = string */
-  lua_pop(L, 1);  /* pop metatable */
-}
-
-
-/*
-** Open string library
-*/
-LUAMOD_API int luaopen_string (lua_State *L) {
-  luaL_newlib(L, strlib);
-  createmetatable(L);
-  return 1;
-}
-
diff --git a/src/lib/lualib/ltablib.c b/src/lib/lualib/ltablib.c
deleted file mode 100644
index 98b2f87..0000000
--- a/src/lib/lualib/ltablib.c
+++ /dev/null
@@ -1,450 +0,0 @@
-/*
-** $Id: ltablib.c,v 1.93 2016/02/25 19:41:54 roberto Exp $
-** Library for Table Manipulation
-** See Copyright Notice in lua.h
-*/
-
-#define ltablib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <limits.h>
-#include <stddef.h>
-#include <string.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-/*
-** Operations that an object must define to mimic a table
-** (some functions only need some of them)
-*/
-#define TAB_R	1			/* read */
-#define TAB_W	2			/* write */
-#define TAB_L	4			/* length */
-#define TAB_RW	(TAB_R | TAB_W)		/* read/write */
-
-
-#define aux_getn(L,n,w)	(checktab(L, n, (w) | TAB_L), luaL_len(L, n))
-
-
-static int checkfield (lua_State *L, const char *key, int n) {
-  lua_pushstring(L, key);
-  return (lua_rawget(L, -n) != LUA_TNIL);
-}
-
-
-/*
-** Check that 'arg' either is a table or can behave like one (that is,
-** has a metatable with the required metamethods)
-*/
-static void checktab (lua_State *L, int arg, int what) {
-  if (lua_type(L, arg) != LUA_TTABLE) {  /* is it not a table? */
-    int n = 1;  /* number of elements to pop */
-    if (lua_getmetatable(L, arg) &&  /* must have metatable */
-        (!(what & TAB_R) || checkfield(L, "__index", ++n)) &&
-        (!(what & TAB_W) || checkfield(L, "__newindex", ++n)) &&
-        (!(what & TAB_L) || checkfield(L, "__len", ++n))) {
-      lua_pop(L, n);  /* pop metatable and tested metamethods */
-    }
-    else
-      luaL_checktype(L, arg, LUA_TTABLE);  /* force an error */
-  }
-}
-
-
-#if defined(LUA_COMPAT_MAXN)
-static int maxn (lua_State *L) {
-  lua_Number max = 0;
-  luaL_checktype(L, 1, LUA_TTABLE);
-  lua_pushnil(L);  /* first key */
-  while (lua_next(L, 1)) {
-    lua_pop(L, 1);  /* remove value */
-    if (lua_type(L, -1) == LUA_TNUMBER) {
-      lua_Number v = lua_tonumber(L, -1);
-      if (v > max) max = v;
-    }
-  }
-  lua_pushnumber(L, max);
-  return 1;
-}
-#endif
-
-
-static int tinsert (lua_State *L) {
-  lua_Integer e = aux_getn(L, 1, TAB_RW) + 1;  /* first empty element */
-  lua_Integer pos;  /* where to insert new element */
-  switch (lua_gettop(L)) {
-    case 2: {  /* called with only 2 arguments */
-      pos = e;  /* insert new element at the end */
-      break;
-    }
-    case 3: {
-      lua_Integer i;
-      pos = luaL_checkinteger(L, 2);  /* 2nd argument is the position */
-      luaL_argcheck(L, 1 <= pos && pos <= e, 2, "position out of bounds");
-      for (i = e; i > pos; i--) {  /* move up elements */
-        lua_geti(L, 1, i - 1);
-        lua_seti(L, 1, i);  /* t[i] = t[i - 1] */
-      }
-      break;
-    }
-    default: {
-      return luaL_error(L, "wrong number of arguments to 'insert'");
-    }
-  }
-  lua_seti(L, 1, pos);  /* t[pos] = v */
-  return 0;
-}
-
-
-static int tremove (lua_State *L) {
-  lua_Integer size = aux_getn(L, 1, TAB_RW);
-  lua_Integer pos = luaL_optinteger(L, 2, size);
-  if (pos != size)  /* validate 'pos' if given */
-    luaL_argcheck(L, 1 <= pos && pos <= size + 1, 1, "position out of bounds");
-  lua_geti(L, 1, pos);  /* result = t[pos] */
-  for ( ; pos < size; pos++) {
-    lua_geti(L, 1, pos + 1);
-    lua_seti(L, 1, pos);  /* t[pos] = t[pos + 1] */
-  }
-  lua_pushnil(L);
-  lua_seti(L, 1, pos);  /* t[pos] = nil */
-  return 1;
-}
-
-
-/*
-** Copy elements (1[f], ..., 1[e]) into (tt[t], tt[t+1], ...). Whenever
-** possible, copy in increasing order, which is better for rehashing.
-** "possible" means destination after original range, or smaller
-** than origin, or copying to another table.
-*/
-static int tmove (lua_State *L) {
-  lua_Integer f = luaL_checkinteger(L, 2);
-  lua_Integer e = luaL_checkinteger(L, 3);
-  lua_Integer t = luaL_checkinteger(L, 4);
-  int tt = !lua_isnoneornil(L, 5) ? 5 : 1;  /* destination table */
-  checktab(L, 1, TAB_R);
-  checktab(L, tt, TAB_W);
-  if (e >= f) {  /* otherwise, nothing to move */
-    lua_Integer n, i;
-    luaL_argcheck(L, f > 0 || e < LUA_MAXINTEGER + f, 3,
-                  "too many elements to move");
-    n = e - f + 1;  /* number of elements to move */
-    luaL_argcheck(L, t <= LUA_MAXINTEGER - n + 1, 4,
-                  "destination wrap around");
-    if (t > e || t <= f || (tt != 1 && !lua_compare(L, 1, tt, LUA_OPEQ))) {
-      for (i = 0; i < n; i++) {
-        lua_geti(L, 1, f + i);
-        lua_seti(L, tt, t + i);
-      }
-    }
-    else {
-      for (i = n - 1; i >= 0; i--) {
-        lua_geti(L, 1, f + i);
-        lua_seti(L, tt, t + i);
-      }
-    }
-  }
-  lua_pushvalue(L, tt);  /* return destination table */
-  return 1;
-}
-
-
-static void addfield (lua_State *L, luaL_Buffer *b, lua_Integer i) {
-  lua_geti(L, 1, i);
-  if (!lua_isstring(L, -1))
-    luaL_error(L, "invalid value (%s) at index %d in table for 'concat'",
-                  luaL_typename(L, -1), i);
-  luaL_addvalue(b);
-}
-
-
-static int tconcat (lua_State *L) {
-  luaL_Buffer b;
-  lua_Integer last = aux_getn(L, 1, TAB_R);
-  size_t lsep;
-  const char *sep = luaL_optlstring(L, 2, "", &lsep);
-  lua_Integer i = luaL_optinteger(L, 3, 1);
-  last = luaL_optinteger(L, 4, last);
-  luaL_buffinit(L, &b);
-  for (; i < last; i++) {
-    addfield(L, &b, i);
-    luaL_addlstring(&b, sep, lsep);
-  }
-  if (i == last)  /* add last value (if interval was not empty) */
-    addfield(L, &b, i);
-  luaL_pushresult(&b);
-  return 1;
-}
-
-
-/*
-** {======================================================
-** Pack/unpack
-** =======================================================
-*/
-
-static int pack (lua_State *L) {
-  int i;
-  int n = lua_gettop(L);  /* number of elements to pack */
-  lua_createtable(L, n, 1);  /* create result table */
-  lua_insert(L, 1);  /* put it at index 1 */
-  for (i = n; i >= 1; i--)  /* assign elements */
-    lua_seti(L, 1, i);
-  lua_pushinteger(L, n);
-  lua_setfield(L, 1, "n");  /* t.n = number of elements */
-  return 1;  /* return table */
-}
-
-
-static int unpack (lua_State *L) {
-  lua_Unsigned n;
-  lua_Integer i = luaL_optinteger(L, 2, 1);
-  lua_Integer e = luaL_opt(L, luaL_checkinteger, 3, luaL_len(L, 1));
-  if (i > e) return 0;  /* empty range */
-  n = (lua_Unsigned)e - i;  /* number of elements minus 1 (avoid overflows) */
-  if (n >= (unsigned int)INT_MAX  || !lua_checkstack(L, (int)(++n)))
-    return luaL_error(L, "too many results to unpack");
-  for (; i < e; i++) {  /* push arg[i..e - 1] (to avoid overflows) */
-    lua_geti(L, 1, i);
-  }
-  lua_geti(L, 1, e);  /* push last element */
-  return (int)n;
-}
-
-/* }====================================================== */
-
-
-
-/*
-** {======================================================
-** Quicksort
-** (based on 'Algorithms in MODULA-3', Robert Sedgewick;
-**  Addison-Wesley, 1993.)
-** =======================================================
-*/
-
-
-/* type for array indices */
-typedef unsigned int IdxT;
-
-
-/*
-** Produce a "random" 'unsigned int' to randomize pivot choice. This
-** macro is used only when 'sort' detects a big imbalance in the result
-** of a partition. (If you don't want/need this "randomness", ~0 is a
-** good choice.)
-*/
-#if !defined(l_randomizePivot)		/* { */
-
-#include <time.h>
-
-/* size of 'e' measured in number of 'unsigned int's */
-#define sof(e)		(sizeof(e) / sizeof(unsigned int))
-
-/*
-** Use 'time' and 'clock' as sources of "randomness". Because we don't
-** know the types 'clock_t' and 'time_t', we cannot cast them to
-** anything without risking overflows. A safe way to use their values
-** is to copy them to an array of a known type and use the array values.
-*/
-static unsigned int l_randomizePivot (void) {
-  clock_t c = clock();
-  time_t t = time(NULL);
-  unsigned int buff[sof(c) + sof(t)];
-  unsigned int i, rnd = 0;
-  memcpy(buff, &c, sof(c) * sizeof(unsigned int));
-  memcpy(buff + sof(c), &t, sof(t) * sizeof(unsigned int));
-  for (i = 0; i < sof(buff); i++)
-    rnd += buff[i];
-  return rnd;
-}
-
-#endif					/* } */
-
-
-/* arrays larger than 'RANLIMIT' may use randomized pivots */
-#define RANLIMIT	100u
-
-
-static void set2 (lua_State *L, IdxT i, IdxT j) {
-  lua_seti(L, 1, i);
-  lua_seti(L, 1, j);
-}
-
-
-/*
-** Return true iff value at stack index 'a' is less than the value at
-** index 'b' (according to the order of the sort).
-*/
-static int sort_comp (lua_State *L, int a, int b) {
-  if (lua_isnil(L, 2))  /* no function? */
-    return lua_compare(L, a, b, LUA_OPLT);  /* a < b */
-  else {  /* function */
-    int res;
-    lua_pushvalue(L, 2);    /* push function */
-    lua_pushvalue(L, a-1);  /* -1 to compensate function */
-    lua_pushvalue(L, b-2);  /* -2 to compensate function and 'a' */
-    lua_call(L, 2, 1);      /* call function */
-    res = lua_toboolean(L, -1);  /* get result */
-    lua_pop(L, 1);          /* pop result */
-    return res;
-  }
-}
-
-
-/*
-** Does the partition: Pivot P is at the top of the stack.
-** precondition: a[lo] <= P == a[up-1] <= a[up],
-** so it only needs to do the partition from lo + 1 to up - 2.
-** Pos-condition: a[lo .. i - 1] <= a[i] == P <= a[i + 1 .. up]
-** returns 'i'.
-*/
-static IdxT partition (lua_State *L, IdxT lo, IdxT up) {
-  IdxT i = lo;  /* will be incremented before first use */
-  IdxT j = up - 1;  /* will be decremented before first use */
-  /* loop invariant: a[lo .. i] <= P <= a[j .. up] */
-  for (;;) {
-    /* next loop: repeat ++i while a[i] < P */
-    while (lua_geti(L, 1, ++i), sort_comp(L, -1, -2)) {
-      if (i == up - 1)  /* a[i] < P  but a[up - 1] == P  ?? */
-        luaL_error(L, "invalid order function for sorting");
-      lua_pop(L, 1);  /* remove a[i] */
-    }
-    /* after the loop, a[i] >= P and a[lo .. i - 1] < P */
-    /* next loop: repeat --j while P < a[j] */
-    while (lua_geti(L, 1, --j), sort_comp(L, -3, -1)) {
-      if (j < i)  /* j < i  but  a[j] > P ?? */
-        luaL_error(L, "invalid order function for sorting");
-      lua_pop(L, 1);  /* remove a[j] */
-    }
-    /* after the loop, a[j] <= P and a[j + 1 .. up] >= P */
-    if (j < i) {  /* no elements out of place? */
-      /* a[lo .. i - 1] <= P <= a[j + 1 .. i .. up] */
-      lua_pop(L, 1);  /* pop a[j] */
-      /* swap pivot (a[up - 1]) with a[i] to satisfy pos-condition */
-      set2(L, up - 1, i);
-      return i;
-    }
-    /* otherwise, swap a[i] - a[j] to restore invariant and repeat */
-    set2(L, i, j);
-  }
-}
-
-
-/*
-** Choose an element in the middle (2nd-3th quarters) of [lo,up]
-** "randomized" by 'rnd'
-*/
-static IdxT choosePivot (IdxT lo, IdxT up, unsigned int rnd) {
-  IdxT r4 = (up - lo) / 4;  /* range/4 */
-  IdxT p = rnd % (r4 * 2) + (lo + r4);
-  lua_assert(lo + r4 <= p && p <= up - r4);
-  return p;
-}
-
-
-/*
-** QuickSort algorithm (recursive function)
-*/
-static void auxsort (lua_State *L, IdxT lo, IdxT up,
-                                   unsigned int rnd) {
-  while (lo < up) {  /* loop for tail recursion */
-    IdxT p;  /* Pivot index */
-    IdxT n;  /* to be used later */
-    /* sort elements 'lo', 'p', and 'up' */
-    lua_geti(L, 1, lo);
-    lua_geti(L, 1, up);
-    if (sort_comp(L, -1, -2))  /* a[up] < a[lo]? */
-      set2(L, lo, up);  /* swap a[lo] - a[up] */
-    else
-      lua_pop(L, 2);  /* remove both values */
-    if (up - lo == 1)  /* only 2 elements? */
-      return;  /* already sorted */
-    if (up - lo < RANLIMIT || rnd == 0)  /* small interval or no randomize? */
-      p = (lo + up)/2;  /* middle element is a good pivot */
-    else  /* for larger intervals, it is worth a random pivot */
-      p = choosePivot(lo, up, rnd);
-    lua_geti(L, 1, p);
-    lua_geti(L, 1, lo);
-    if (sort_comp(L, -2, -1))  /* a[p] < a[lo]? */
-      set2(L, p, lo);  /* swap a[p] - a[lo] */
-    else {
-      lua_pop(L, 1);  /* remove a[lo] */
-      lua_geti(L, 1, up);
-      if (sort_comp(L, -1, -2))  /* a[up] < a[p]? */
-        set2(L, p, up);  /* swap a[up] - a[p] */
-      else
-        lua_pop(L, 2);
-    }
-    if (up - lo == 2)  /* only 3 elements? */
-      return;  /* already sorted */
-    lua_geti(L, 1, p);  /* get middle element (Pivot) */
-    lua_pushvalue(L, -1);  /* push Pivot */
-    lua_geti(L, 1, up - 1);  /* push a[up - 1] */
-    set2(L, p, up - 1);  /* swap Pivot (a[p]) with a[up - 1] */
-    p = partition(L, lo, up);
-    /* a[lo .. p - 1] <= a[p] == P <= a[p + 1 .. up] */
-    if (p - lo < up - p) {  /* lower interval is smaller? */
-      auxsort(L, lo, p - 1, rnd);  /* call recursively for lower interval */
-      n = p - lo;  /* size of smaller interval */
-      lo = p + 1;  /* tail call for [p + 1 .. up] (upper interval) */
-    }
-    else {
-      auxsort(L, p + 1, up, rnd);  /* call recursively for upper interval */
-      n = up - p;  /* size of smaller interval */
-      up = p - 1;  /* tail call for [lo .. p - 1]  (lower interval) */
-    }
-    if ((up - lo) / 128 > n) /* partition too imbalanced? */
-      rnd = l_randomizePivot();  /* try a new randomization */
-  }  /* tail call auxsort(L, lo, up, rnd) */
-}
-
-
-static int sort (lua_State *L) {
-  lua_Integer n = aux_getn(L, 1, TAB_RW);
-  if (n > 1) {  /* non-trivial interval? */
-    luaL_argcheck(L, n < INT_MAX, 1, "array too big");
-    if (!lua_isnoneornil(L, 2))  /* is there a 2nd argument? */
-      luaL_checktype(L, 2, LUA_TFUNCTION);  /* must be a function */
-    lua_settop(L, 2);  /* make sure there are two arguments */
-    auxsort(L, 1, (IdxT)n, 0);
-  }
-  return 0;
-}
-
-/* }====================================================== */
-
-
-static const luaL_Reg tab_funcs[] = {
-  {"concat", tconcat},
-#if defined(LUA_COMPAT_MAXN)
-  {"maxn", maxn},
-#endif
-  {"insert", tinsert},
-  {"pack", pack},
-  {"unpack", unpack},
-  {"remove", tremove},
-  {"move", tmove},
-  {"sort", sort},
-  {NULL, NULL}
-};
-
-
-LUAMOD_API int luaopen_table (lua_State *L) {
-  luaL_newlib(L, tab_funcs);
-#if defined(LUA_COMPAT_UNPACK)
-  /* _G.unpack = table.unpack */
-  lua_getfield(L, -1, "unpack");
-  lua_setglobal(L, "unpack");
-#endif
-  return 1;
-}
-
diff --git a/src/lib/lualib/lua.hpp b/src/lib/lualib/lua.hpp
deleted file mode 100644
index ec417f5..0000000
--- a/src/lib/lualib/lua.hpp
+++ /dev/null
@@ -1,9 +0,0 @@
-// lua.hpp
-// Lua header files for C++
-// <<extern "C">> not supplied automatically because Lua also compiles as C++
-
-extern "C" {
-#include "lua.h"
-#include "lualib.h"
-#include "lauxlib.h"
-}
diff --git a/src/lib/lualib/lualib.h b/src/lib/lualib/lualib.h
deleted file mode 100644
index 5165c0f..0000000
--- a/src/lib/lualib/lualib.h
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
-** $Id: lualib.h,v 1.44 2014/02/06 17:32:33 roberto Exp $
-** Lua standard libraries
-** See Copyright Notice in lua.h
-*/
-
-
-#ifndef lualib_h
-#define lualib_h
-
-#include "lua.h"
-
-
-
-LUAMOD_API int (luaopen_base) (lua_State *L);
-
-#define LUA_COLIBNAME	"coroutine"
-LUAMOD_API int (luaopen_coroutine) (lua_State *L);
-
-#define LUA_TABLIBNAME	"table"
-LUAMOD_API int (luaopen_table) (lua_State *L);
-
-#define LUA_IOLIBNAME	"io"
-LUAMOD_API int (luaopen_io) (lua_State *L);
-
-#define LUA_OSLIBNAME	"os"
-LUAMOD_API int (luaopen_os) (lua_State *L);
-
-#define LUA_STRLIBNAME	"string"
-LUAMOD_API int (luaopen_string) (lua_State *L);
-
-#define LUA_UTF8LIBNAME	"utf8"
-LUAMOD_API int (luaopen_utf8) (lua_State *L);
-
-#define LUA_BITLIBNAME	"bit32"
-LUAMOD_API int (luaopen_bit32) (lua_State *L);
-
-#define LUA_MATHLIBNAME	"math"
-LUAMOD_API int (luaopen_math) (lua_State *L);
-
-#define LUA_DBLIBNAME	"debug"
-LUAMOD_API int (luaopen_debug) (lua_State *L);
-
-#define LUA_LOADLIBNAME	"package"
-LUAMOD_API int (luaopen_package) (lua_State *L);
-
-
-/* open all previous libraries */
-LUALIB_API void (luaL_openlibs) (lua_State *L);
-
-
-
-#if !defined(lua_assert)
-#define lua_assert(x)	((void)0)
-#endif
-
-
-#endif
diff --git a/src/lib/lualib/lutf8lib.c b/src/lib/lualib/lutf8lib.c
deleted file mode 100644
index 9042582..0000000
--- a/src/lib/lualib/lutf8lib.c
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
-** $Id: lutf8lib.c,v 1.15 2015/03/28 19:16:55 roberto Exp $
-** Standard library for UTF-8 manipulation
-** See Copyright Notice in lua.h
-*/
-
-#define lutf8lib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <assert.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-#define MAXUNICODE	0x10FFFF
-
-#define iscont(p)	((*(p) & 0xC0) == 0x80)
-
-
-/* from strlib */
-/* translate a relative string position: negative means back from end */
-static lua_Integer u_posrelat (lua_Integer pos, size_t len) {
-  if (pos >= 0) return pos;
-  else if (0u - (size_t)pos > len) return 0;
-  else return (lua_Integer)len + pos + 1;
-}
-
-
-/*
-** Decode one UTF-8 sequence, returning NULL if byte sequence is invalid.
-*/
-static const char *utf8_decode (const char *o, int *val) {
-  static const unsigned int limits[] = {0xFF, 0x7F, 0x7FF, 0xFFFF};
-  const unsigned char *s = (const unsigned char *)o;
-  unsigned int c = s[0];
-  unsigned int res = 0;  /* final result */
-  if (c < 0x80)  /* ascii? */
-    res = c;
-  else {
-    int count = 0;  /* to count number of continuation bytes */
-    while (c & 0x40) {  /* still have continuation bytes? */
-      int cc = s[++count];  /* read next byte */
-      if ((cc & 0xC0) != 0x80)  /* not a continuation byte? */
-        return NULL;  /* invalid byte sequence */
-      res = (res << 6) | (cc & 0x3F);  /* add lower 6 bits from cont. byte */
-      c <<= 1;  /* to test next bit */
-    }
-    res |= ((c & 0x7F) << (count * 5));  /* add first byte */
-    if (count > 3 || res > MAXUNICODE || res <= limits[count])
-      return NULL;  /* invalid byte sequence */
-    s += count;  /* skip continuation bytes read */
-  }
-  if (val) *val = res;
-  return (const char *)s + 1;  /* +1 to include first byte */
-}
-
-
-/*
-** utf8len(s [, i [, j]]) --> number of characters that start in the
-** range [i,j], or nil + current position if 's' is not well formed in
-** that interval
-*/
-static int utflen (lua_State *L) {
-  int n = 0;
-  size_t len;
-  const char *s = luaL_checklstring(L, 1, &len);
-  lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len);
-  lua_Integer posj = u_posrelat(luaL_optinteger(L, 3, -1), len);
-  luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 2,
-                   "initial position out of string");
-  luaL_argcheck(L, --posj < (lua_Integer)len, 3,
-                   "final position out of string");
-  while (posi <= posj) {
-    const char *s1 = utf8_decode(s + posi, NULL);
-    if (s1 == NULL) {  /* conversion error? */
-      lua_pushnil(L);  /* return nil ... */
-      lua_pushinteger(L, posi + 1);  /* ... and current position */
-      return 2;
-    }
-    posi = s1 - s;
-    n++;
-  }
-  lua_pushinteger(L, n);
-  return 1;
-}
-
-
-/*
-** codepoint(s, [i, [j]])  -> returns codepoints for all characters
-** that start in the range [i,j]
-*/
-static int codepoint (lua_State *L) {
-  size_t len;
-  const char *s = luaL_checklstring(L, 1, &len);
-  lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len);
-  lua_Integer pose = u_posrelat(luaL_optinteger(L, 3, posi), len);
-  int n;
-  const char *se;
-  luaL_argcheck(L, posi >= 1, 2, "out of range");
-  luaL_argcheck(L, pose <= (lua_Integer)len, 3, "out of range");
-  if (posi > pose) return 0;  /* empty interval; return no values */
-  if (pose - posi >= INT_MAX)  /* (lua_Integer -> int) overflow? */
-    return luaL_error(L, "string slice too long");
-  n = (int)(pose -  posi) + 1;
-  luaL_checkstack(L, n, "string slice too long");
-  n = 0;
-  se = s + pose;
-  for (s += posi - 1; s < se;) {
-    int code;
-    s = utf8_decode(s, &code);
-    if (s == NULL)
-      return luaL_error(L, "invalid UTF-8 code");
-    lua_pushinteger(L, code);
-    n++;
-  }
-  return n;
-}
-
-
-static void pushutfchar (lua_State *L, int arg) {
-  lua_Integer code = luaL_checkinteger(L, arg);
-  luaL_argcheck(L, 0 <= code && code <= MAXUNICODE, arg, "value out of range");
-  lua_pushfstring(L, "%U", (long)code);
-}
-
-
-/*
-** utfchar(n1, n2, ...)  -> char(n1)..char(n2)...
-*/
-static int utfchar (lua_State *L) {
-  int n = lua_gettop(L);  /* number of arguments */
-  if (n == 1)  /* optimize common case of single char */
-    pushutfchar(L, 1);
-  else {
-    int i;
-    luaL_Buffer b;
-    luaL_buffinit(L, &b);
-    for (i = 1; i <= n; i++) {
-      pushutfchar(L, i);
-      luaL_addvalue(&b);
-    }
-    luaL_pushresult(&b);
-  }
-  return 1;
-}
-
-
-/*
-** offset(s, n, [i])  -> index where n-th character counting from
-**   position 'i' starts; 0 means character at 'i'.
-*/
-static int byteoffset (lua_State *L) {
-  size_t len;
-  const char *s = luaL_checklstring(L, 1, &len);
-  lua_Integer n  = luaL_checkinteger(L, 2);
-  lua_Integer posi = (n >= 0) ? 1 : len + 1;
-  posi = u_posrelat(luaL_optinteger(L, 3, posi), len);
-  luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 3,
-                   "position out of range");
-  if (n == 0) {
-    /* find beginning of current byte sequence */
-    while (posi > 0 && iscont(s + posi)) posi--;
-  }
-  else {
-    if (iscont(s + posi))
-      luaL_error(L, "initial position is a continuation byte");
-    if (n < 0) {
-       while (n < 0 && posi > 0) {  /* move back */
-         do {  /* find beginning of previous character */
-           posi--;
-         } while (posi > 0 && iscont(s + posi));
-         n++;
-       }
-     }
-     else {
-       n--;  /* do not move for 1st character */
-       while (n > 0 && posi < (lua_Integer)len) {
-         do {  /* find beginning of next character */
-           posi++;
-         } while (iscont(s + posi));  /* (cannot pass final '\0') */
-         n--;
-       }
-     }
-  }
-  if (n == 0)  /* did it find given character? */
-    lua_pushinteger(L, posi + 1);
-  else  /* no such character */
-    lua_pushnil(L);
-  return 1;  
-}
-
-
-static int iter_aux (lua_State *L) {
-  size_t len;
-  const char *s = luaL_checklstring(L, 1, &len);
-  lua_Integer n = lua_tointeger(L, 2) - 1;
-  if (n < 0)  /* first iteration? */
-    n = 0;  /* start from here */
-  else if (n < (lua_Integer)len) {
-    n++;  /* skip current byte */
-    while (iscont(s + n)) n++;  /* and its continuations */
-  }
-  if (n >= (lua_Integer)len)
-    return 0;  /* no more codepoints */
-  else {
-    int code;
-    const char *next = utf8_decode(s + n, &code);
-    if (next == NULL || iscont(next))
-      return luaL_error(L, "invalid UTF-8 code");
-    lua_pushinteger(L, n + 1);
-    lua_pushinteger(L, code);
-    return 2;
-  }
-}
-
-
-static int iter_codes (lua_State *L) {
-  luaL_checkstring(L, 1);
-  lua_pushcfunction(L, iter_aux);
-  lua_pushvalue(L, 1);
-  lua_pushinteger(L, 0);
-  return 3;
-}
-
-
-/* pattern to match a single UTF-8 character */
-#define UTF8PATT	"[\0-\x7F\xC2-\xF4][\x80-\xBF]*"
-
-
-static const luaL_Reg funcs[] = {
-  {"offset", byteoffset},
-  {"codepoint", codepoint},
-  {"char", utfchar},
-  {"len", utflen},
-  {"codes", iter_codes},
-  /* placeholders */
-  {"charpattern", NULL},
-  {NULL, NULL}
-};
-
-
-LUAMOD_API int luaopen_utf8 (lua_State *L) {
-  luaL_newlib(L, funcs);
-  lua_pushlstring(L, UTF8PATT, sizeof(UTF8PATT)/sizeof(char) - 1);
-  lua_setfield(L, -2, "charpattern");
-  return 1;
-}
-