adjust some folder levels.

1 files changed, 0 insertions, 1105 deletions

diff --git a/src/lua/lauxlib.c b/src/lua/lauxlib.c
deleted file mode 100644
index 94835ef..0000000
--- a/src/lua/lauxlib.c
+++ /dev/null
@@ -1,1105 +0,0 @@
-/*
-** $Id: lauxlib.c $
-** 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"
-
-
-#if !defined(MAX_SIZET)
-/* maximum value for size_t */
-#define MAX_SIZET       ((size_t)(~(size_t)0))
-#endif
-
-
-/*
-** {======================================================
-** 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. ('objidx' must be an
-** absolute index.) Return 1 + string at top if it found 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 */
-        /* stack: lib_name, lib_table, field_name (top) */
-        lua_pushliteral(L, ".");  /* place '.' between the two names */
-        lua_replace(L, -3);  /* (in the slot occupied by table) */
-        lua_concat(L, 3);  /* lib_name.field_name */
-        return 1;
-      }
-    }
-    lua_pop(L, 1);  /* remove value */
-  }
-  return 0;  /* not found */
-}
-
-
-/*
-** Search for a name for a function in all loaded modules
-*/
-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, LUA_LOADED_TABLE);
-  if (findfield(L, top + 1, 2)) {
-    const char *name = lua_tostring(L, -1);
-    if (strncmp(name, LUA_GNAME ".", 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);  /* copy name to proper place */
-    lua_settop(L, top + 1);  /* remove table "loaded" and name copy */
-    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) {
-  luaL_Buffer b;
-  lua_Debug ar;
-  int last = lastlevel(L1);
-  int limit2show = (last - level > LEVELS1 + LEVELS2) ? LEVELS1 : -1;
-  luaL_buffinit(L, &b);
-  if (msg) {
-    luaL_addstring(&b, msg);
-    luaL_addchar(&b, '\n');
-  }
-  luaL_addstring(&b, "stack traceback:");
-  while (lua_getstack(L1, level++, &ar)) {
-    if (limit2show-- == 0) {  /* too many levels? */
-      int n = last - level - LEVELS2 + 1;  /* number of levels to skip */
-      lua_pushfstring(L, "\n\t...\t(skipping %d levels)", n);
-      luaL_addvalue(&b);  /* add warning about skip */
-      level += n;  /* and skip to last levels */
-    }
-    else {
-      lua_getinfo(L1, "Slnt", &ar);
-      if (ar.currentline <= 0)
-        lua_pushfstring(L, "\n\t%s: in ", ar.short_src);
-      else
-        lua_pushfstring(L, "\n\t%s:%d: in ", ar.short_src, ar.currentline);
-      luaL_addvalue(&b);
-      pushfuncname(L, &ar);
-      luaL_addvalue(&b);
-      if (ar.istailcall)
-        luaL_addstring(&b, "\n\t(...tail calls...)");
-    }
-  }
-  luaL_pushresult(&b);
-}
-
-/* }====================================================== */
-
-
-/*
-** {======================================================
-** 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);
-}
-
-
-LUALIB_API int luaL_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) {
-  luaL_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 {
-    luaL_pushfail(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) {
-  if (stat != 0 && errno != 0)  /* error with an 'errno'? */
-    return luaL_fileresult(L, 0, NULL);
-  else {
-    const char *what = "exit";  /* type of termination */
-    l_inspectstat(stat, what);  /* interpret result */
-    if (*what == 'e' && stat == 0)  /* successful termination? */
-      lua_pushboolean(L, 1);
-    else
-      luaL_pushfail(L);
-    lua_pushstring(L, what);
-    lua_pushinteger(L, stat);
-    return 3;  /* return true/fail,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);
-  luaL_argexpected(L, p != NULL, 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 (l_unlikely(!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 (l_unlikely(lua_type(L, arg) != t))
-    tag_error(L, arg, t);
-}
-
-
-LUALIB_API void luaL_checkany (lua_State *L, int arg) {
-  if (l_unlikely(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 (l_unlikely(!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 (l_unlikely(!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 (l_unlikely(!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 (l_unlikely(temp == NULL && newsize > 0)) {  /* allocation error? */
-    lua_pushliteral(L, "not enough memory");
-    lua_error(L);  /* raise a memory error */
-  }
-  box->box = temp;
-  box->bsize = newsize;
-  return temp;
-}
-
-
-static int boxgc (lua_State *L) {
-  resizebox(L, 1, 0);
-  return 0;
-}
-
-
-static const luaL_Reg boxmt[] = {  /* box metamethods */
-  {"__gc", boxgc},
-  {"__close", boxgc},
-  {NULL, NULL}
-};
-
-
-static void newbox (lua_State *L) {
-  UBox *box = (UBox *)lua_newuserdatauv(L, sizeof(UBox), 0);
-  box->box = NULL;
-  box->bsize = 0;
-  if (luaL_newmetatable(L, "_UBOX*"))  /* creating metatable? */
-    luaL_setfuncs(L, boxmt, 0);  /* set its metamethods */
-  lua_setmetatable(L, -2);
-}
-
-
-/*
-** check whether buffer is using a userdata on the stack as a temporary
-** buffer
-*/
-#define buffonstack(B)  ((B)->b != (B)->init.b)
-
-
-/*
-** Whenever buffer is accessed, slot 'idx' must either be a box (which
-** cannot be NULL) or it is a placeholder for the buffer.
-*/
-#define checkbufferlevel(B,idx)  \
-  lua_assert(buffonstack(B) ? lua_touserdata(B->L, idx) != NULL  \
-                            : lua_touserdata(B->L, idx) == (void*)B)
-
-
-/*
-** Compute new size for buffer 'B', enough to accommodate extra 'sz'
-** bytes.
-*/
-static size_t newbuffsize (luaL_Buffer *B, size_t sz) {
-  size_t newsize = B->size * 2;  /* double buffer size */
-  if (l_unlikely(MAX_SIZET - sz < B->n))  /* overflow in (B->n + sz)? */
-    return luaL_error(B->L, "buffer too large");
-  if (newsize < B->n + sz)  /* double is not big enough? */
-    newsize = B->n + sz;
-  return newsize;
-}
-
-
-/*
-** Returns a pointer to a free area with at least 'sz' bytes in buffer
-** 'B'. 'boxidx' is the relative position in the stack where is the
-** buffer's box or its placeholder.
-*/
-static char *prepbuffsize (luaL_Buffer *B, size_t sz, int boxidx) {
-  checkbufferlevel(B, boxidx);
-  if (B->size - B->n >= sz)  /* enough space? */
-    return B->b + B->n;
-  else {
-    lua_State *L = B->L;
-    char *newbuff;
-    size_t newsize = newbuffsize(B, sz);
-    /* create larger buffer */
-    if (buffonstack(B))  /* buffer already has a box? */
-      newbuff = (char *)resizebox(L, boxidx, newsize);  /* resize it */
-    else {  /* no box yet */
-      lua_remove(L, boxidx);  /* remove placeholder */
-      newbox(L);  /* create a new box */
-      lua_insert(L, boxidx);  /* move box to its intended position */
-      lua_toclose(L, boxidx);
-      newbuff = (char *)resizebox(L, boxidx, newsize);
-      memcpy(newbuff, B->b, B->n * sizeof(char));  /* copy original content */
-    }
-    B->b = newbuff;
-    B->size = newsize;
-    return newbuff + B->n;
-  }
-}
-
-/*
-** returns a pointer to a free area with at least 'sz' bytes
-*/
-LUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) {
-  return prepbuffsize(B, sz, -1);
-}
-
-
-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 = prepbuffsize(B, l, -1);
-    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;
-  checkbufferlevel(B, -1);
-  lua_pushlstring(L, B->b, B->n);
-  if (buffonstack(B))
-    lua_closeslot(L, -2);  /* close the box */
-  lua_remove(L, -2);  /* remove box or placeholder from the stack */
-}
-
-
-LUALIB_API void luaL_pushresultsize (luaL_Buffer *B, size_t sz) {
-  luaL_addsize(B, sz);
-  luaL_pushresult(B);
-}
-
-
-/*
-** 'luaL_addvalue' is the only function in the Buffer system where the
-** box (if existent) is not on the top of the stack. So, instead of
-** calling 'luaL_addlstring', it replicates the code using -2 as the
-** last argument to 'prepbuffsize', signaling that the box is (or will
-** be) bellow the string being added to the buffer. (Box creation can
-** trigger an emergency GC, so we should not remove the string from the
-** stack before we have the space guaranteed.)
-*/
-LUALIB_API void luaL_addvalue (luaL_Buffer *B) {
-  lua_State *L = B->L;
-  size_t len;
-  const char *s = lua_tolstring(L, -1, &len);
-  char *b = prepbuffsize(B, len, -2);
-  memcpy(b, s, len * sizeof(char));
-  luaL_addsize(B, len);
-  lua_pop(L, 1);  /* pop string */
-}
-
-
-LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) {
-  B->L = L;
-  B->b = B->init.b;
-  B->n = 0;
-  B->size = LUAL_BUFFERSIZE;
-  lua_pushlightuserdata(L, (void*)B);  /* push placeholder */
-}
-
-
-LUALIB_API char *luaL_buffinitsize (lua_State *L, luaL_Buffer *B, size_t sz) {
-  luaL_buffinit(L, B);
-  return prepbuffsize(B, sz, -1);
-}
-
-/* }====================================================== */
-
-
-/*
-** {======================================================
-** Reference system
-** =======================================================
-*/
-
-/* index of free-list header (after the predefined values) */
-#define freelist        (LUA_RIDX_LAST + 1)
-
-/*
-** The previously freed references form a linked list:
-** t[freelist] is the index of a first free index, or zero if list is
-** empty; t[t[freelist]] is the index of the second element; etc.
-*/
-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);
-  if (lua_rawgeti(L, t, freelist) == LUA_TNIL) {  /* first access? */
-    ref = 0;  /* list is empty */
-    lua_pushinteger(L, 0);  /* initialize as an empty list */
-    lua_rawseti(L, t, freelist);  /* ref = t[freelist] = 0 */
-  }
-  else {  /* already initialized */
-    lua_assert(lua_isinteger(L, -1));
-    ref = (int)lua_tointeger(L, -1);  /* ref = t[freelist] */
-  }
-  lua_pop(L, 1);  /* remove element 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_assert(lua_isinteger(L, -1));
-    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 (l_unlikely(!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")) {  /* metafield? */
-    if (!lua_isstring(L, -1))
-      luaL_error(L, "'__tostring' must return a string");
-  }
-  else {
-    switch (lua_type(L, idx)) {
-      case LUA_TNUMBER: {
-        if (lua_isinteger(L, idx))
-          lua_pushfstring(L, "%I", (LUAI_UACINT)lua_tointeger(L, idx));
-        else
-          lua_pushfstring(L, "%f", (LUAI_UACNUMBER)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: {
-        int tt = luaL_getmetafield(L, idx, "__name");  /* try name */
-        const char *kind = (tt == LUA_TSTRING) ? lua_tostring(L, -1) :
-                                                 luaL_typename(L, idx);
-        lua_pushfstring(L, "%s: %p", kind, lua_topointer(L, idx));
-        if (tt != LUA_TNIL)
-          lua_remove(L, -2);  /* remove '__name' */
-        break;
-      }
-    }
-  }
-  return lua_tolstring(L, -1, len);
-}
-
-
-/*
-** 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 */
-    if (l->func == NULL)  /* place holder? */
-      lua_pushboolean(L, 0);
-    else {
-      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, LUA_LOADED_TABLE);
-  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 void luaL_addgsub (luaL_Buffer *b, const char *s,
-                                     const char *p, const char *r) {
-  const char *wild;
-  size_t l = strlen(p);
-  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 */
-}
-
-
-LUALIB_API const char *luaL_gsub (lua_State *L, const char *s,
-                                  const char *p, const char *r) {
-  luaL_Buffer b;
-  luaL_buffinit(L, &b);
-  luaL_addgsub(&b, s, p, r);
-  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) {
-  const char *msg = lua_tostring(L, -1);
-  if (msg == NULL) msg = "error object is not a string";
-  lua_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n",
-                        msg);
-  return 0;  /* return to Lua to abort */
-}
-
-
-/*
-** Warning functions:
-** warnfoff: warning system is off
-** warnfon: ready to start a new message
-** warnfcont: previous message is to be continued
-*/
-static void warnfoff (void *ud, const char *message, int tocont);
-static void warnfon (void *ud, const char *message, int tocont);
-static void warnfcont (void *ud, const char *message, int tocont);
-
-
-/*
-** Check whether message is a control message. If so, execute the
-** control or ignore it if unknown.
-*/
-static int checkcontrol (lua_State *L, const char *message, int tocont) {
-  if (tocont || *(message++) != '@')  /* not a control message? */
-    return 0;
-  else {
-    if (strcmp(message, "off") == 0)
-      lua_setwarnf(L, warnfoff, L);  /* turn warnings off */
-    else if (strcmp(message, "on") == 0)
-      lua_setwarnf(L, warnfon, L);   /* turn warnings on */
-    return 1;  /* it was a control message */
-  }
-}
-
-
-static void warnfoff (void *ud, const char *message, int tocont) {
-  checkcontrol((lua_State *)ud, message, tocont);
-}
-
-
-/*
-** Writes the message and handle 'tocont', finishing the message
-** if needed and setting the next warn function.
-*/
-static void warnfcont (void *ud, const char *message, int tocont) {
-  lua_State *L = (lua_State *)ud;
-  lua_writestringerror("%s", message);  /* write message */
-  if (tocont)  /* not the last part? */
-    lua_setwarnf(L, warnfcont, L);  /* to be continued */
-  else {  /* last part */
-    lua_writestringerror("%s", "\n");  /* finish message with end-of-line */
-    lua_setwarnf(L, warnfon, L);  /* next call is a new message */
-  }
-}
-
-
-static void warnfon (void *ud, const char *message, int tocont) {
-  if (checkcontrol((lua_State *)ud, message, tocont))  /* control message? */
-    return;  /* nothing else to be done */
-  lua_writestringerror("%s", "Lua warning: ");  /* start a new warning */
-  warnfcont(ud, message, tocont);  /* finish processing */
-}
-
-
-LUALIB_API lua_State *luaL_newstate (void) {
-  lua_State *L = lua_newstate(l_alloc, NULL);
-  if (l_likely(L)) {
-    lua_atpanic(L, &panic);
-    lua_setwarnf(L, warnfoff, L);  /* default is warnings off */
-  }
-  return L;
-}
-
-
-LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver, size_t sz) {
-  lua_Number v = lua_version(L);
-  if (sz != LUAL_NUMSIZES)  /* check numeric types */
-    luaL_error(L, "core and library have incompatible numeric types");
-  else if (v != ver)
-    luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f",
-                  (LUAI_UACNUMBER)ver, (LUAI_UACNUMBER)v);
-}
-