adjust some folder levels.

1 files changed, 0 insertions, 828 deletions

diff --git a/src/lua/liolib.c b/src/lua/liolib.c
deleted file mode 100644
index b08397d..0000000
--- a/src/lua/liolib.c
+++ /dev/null
@@ -1,828 +0,0 @@
-/*
-** $Id: liolib.c $
-** 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]*' */
-static int l_checkmode (const char *mode) {
-  return (*mode != '\0' && strchr("rwa", *(mode++)) != NULL &&
-         (*mode != '+' || ((void)(++mode), 1)) &&  /* skip if char is '+' */
-         (strspn(mode, L_MODEEXT) == strlen(mode)));  /* check extensions */
-}
-
-#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))
-
-#if !defined(l_checkmodep)
-/* Windows accepts "[rw][bt]?" as valid modes */
-#define l_checkmodep(m) ((m[0] == 'r' || m[0] == 'w') && \
-  (m[1] == '\0' || ((m[1] == 'b' || m[1] == 't') && m[2] == '\0')))
-#endif
-
-#else                           /* }{ */
-
-/* ISO C definitions */
-#define l_popen(L,c,m)  \
-          ((void)c, (void)m, \
-          luaL_error(L, "'popen' not supported"), \
-          (FILE*)0)
-#define l_pclose(L,file)                ((void)L, (void)file, -1)
-
-#endif                          /* } */
-
-#endif                          /* } */
-
-
-#if !defined(l_checkmodep)
-/* By default, Lua accepts only "r" or "w" as valid modes */
-#define l_checkmodep(m)        ((m[0] == 'r' || m[0] == 'w') && m[1] == '\0')
-#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)
-    luaL_pushfail(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 (l_unlikely(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_newuserdatauv(L, sizeof(LStream), 0);
-  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 f_close (lua_State *L) {
-  tofile(L);  /* make sure argument is an open stream */
-  return aux_close(L);
-}
-
-
-static int io_close (lua_State *L) {
-  if (lua_isnone(L, 1))  /* no argument? */
-    lua_getfield(L, LUA_REGISTRYINDEX, IO_OUTPUT);  /* use default output */
-  return f_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 (l_unlikely(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);
-  errno = 0;
-  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);
-  luaL_argcheck(L, l_checkmodep(mode), 2, "invalid mode");
-  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 (l_unlikely(isclosed(p)))
-    luaL_error(L, "default %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
-
-/*
-** Auxiliary function to create the iteration function for 'lines'.
-** The iteration function is a closure over 'io_readline', with
-** the following upvalues:
-** 1) The file being read (first value in the stack)
-** 2) the number of arguments to read
-** 3) a boolean, true iff file has to be closed when finished ('toclose')
-** *) a variable number of format arguments (rest of the stack)
-*/
-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_pushvalue(L, 1);  /* file */
-  lua_pushinteger(L, n);  /* number of arguments to read */
-  lua_pushboolean(L, toclose);  /* close/not close file when finished */
-  lua_rotate(L, 2, 3);  /* move the three values 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;
-}
-
-
-/*
-** Return an iteration function for 'io.lines'. If file has to be
-** closed, also returns the file itself as a second result (to be
-** closed as the state at the exit of a generic for).
-*/
-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);  /* push iteration function */
-  if (toclose) {
-    lua_pushnil(L);  /* state */
-    lua_pushnil(L);  /* control */
-    lua_pushvalue(L, 1);  /* file is the to-be-closed variable (4th result) */
-    return 4;
-  }
-  else
-    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 (l_unlikely(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 sign */
-  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 sign */
-    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 (l_likely(lua_stringtonumber(L, rn.buff)))
-    return 1;  /* ok, it is a valid number */
-  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;
-  luaL_buffinit(L, &b);
-  do {  /* may need to read several chunks to get whole line */
-    char *buff = luaL_prepbuffer(&b);  /* preallocate buffer space */
-    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;  /* read up to end of line or buffer limit */
-    l_unlockfile(f);
-    luaL_addsize(&b, i);
-  } while (c != EOF && c != '\n');  /* repeat until end of line */
-  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 n, success;
-  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 */
-    luaL_pushfail(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);
-}
-
-
-/*
-** Iteration function for 'lines'.
-*/
-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 false: 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);  /* clear stack */
-      lua_pushvalue(L, lua_upvalueindex(1));  /* push file at index 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,
-                             (LUAI_UACINT)lua_tointeger(L, arg))
-                : fprintf(f, LUA_NUMBER_FMT,
-                             (LUAI_UACNUMBER)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 (l_likely(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 (l_unlikely(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 meth[] = {
-  {"read", f_read},
-  {"write", f_write},
-  {"lines", f_lines},
-  {"flush", f_flush},
-  {"seek", f_seek},
-  {"close", f_close},
-  {"setvbuf", f_setvbuf},
-  {NULL, NULL}
-};
-
-
-/*
-** metamethods for file handles
-*/
-static const luaL_Reg metameth[] = {
-  {"__index", NULL},  /* place holder */
-  {"__gc", f_gc},
-  {"__close", f_gc},
-  {"__tostring", f_tostring},
-  {NULL, NULL}
-};
-
-
-static void createmeta (lua_State *L) {
-  luaL_newmetatable(L, LUA_FILEHANDLE);  /* metatable for file handles */
-  luaL_setfuncs(L, metameth, 0);  /* add metamethods to new metatable */
-  luaL_newlibtable(L, meth);  /* create method table */
-  luaL_setfuncs(L, meth, 0);  /* add file methods to method table */
-  lua_setfield(L, -2, "__index");  /* metatable.__index = method table */
-  lua_pop(L, 1);  /* pop 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 */
-  luaL_pushfail(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;
-}
-