2 files changed, 0 insertions, 553 deletions

diff --git a/lib/lua b/lib/lua
new file mode 160000
+Subproject dd27acefcd98a28c68e686f414a42302113471f
diff --git a/lib/lua/src/liolib.c b/lib/lua/src/liolib.c
deleted file mode 100644
index e79ed1cb2..000000000
--- a/lib/lua/src/liolib.c
+++ /dev/null
@@ -1,553 +0,0 @@
-/*
-** $Id: liolib.c,v 2.73.1.3 2008/01/18 17:47:43 roberto Exp $
-** Standard I/O (and system) library
-** See Copyright Notice in lua.h
-*/
-
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define liolib_c
-#define LUA_LIB
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-
-#define IO_INPUT	1
-#define IO_OUTPUT	2
-
-
-static const char *const fnames[] = {"input", "output"};
-
-
-static int pushresult (lua_State *L, int i, const char *filename) {
-  int en = errno;  /* calls to Lua API may change this value */
-  if (i) {
-    lua_pushboolean(L, 1);
-    return 1;
-  }
-  else {
-    lua_pushnil(L);
-    if (filename)
-      lua_pushfstring(L, "%s: %s", filename, strerror(en));
-    else
-      lua_pushfstring(L, "%s", strerror(en));
-    lua_pushinteger(L, en);
-    return 3;
-  }
-}
-
-
-static void fileerror (lua_State *L, int arg, const char *filename) {
-  lua_pushfstring(L, "%s: %s", filename, strerror(errno));
-  luaL_argerror(L, arg, lua_tostring(L, -1));
-}
-
-
-#define tofilep(L)	((FILE **)luaL_checkudata(L, 1, LUA_FILEHANDLE))
-
-
-static int io_type (lua_State *L) {
-  void *ud;
-  luaL_checkany(L, 1);
-  ud = lua_touserdata(L, 1);
-  lua_getfield(L, LUA_REGISTRYINDEX, LUA_FILEHANDLE);
-  if (ud == NULL || !lua_getmetatable(L, 1) || !lua_rawequal(L, -2, -1))
-    lua_pushnil(L);  /* not a file */
-  else if (*((FILE **)ud) == NULL)
-    lua_pushliteral(L, "closed file");
-  else
-    lua_pushliteral(L, "file");
-  return 1;
-}
-
-
-static FILE *tofile (lua_State *L) {
-  FILE **f = tofilep(L);
-  if (*f == NULL)
-    luaL_error(L, "attempt to use a closed file");
-  return *f;
-}
-
-
-
-/*
-** When creating file handles, always creates a `closed' file handle
-** before opening the actual file; so, if there is a memory error, the
-** file is not left opened.
-*/
-static FILE **newfile (lua_State *L) {
-  FILE **pf = (FILE **)lua_newuserdata(L, sizeof(FILE *));
-  *pf = NULL;  /* file handle is currently `closed' */
-  luaL_getmetatable(L, LUA_FILEHANDLE);
-  lua_setmetatable(L, -2);
-  return pf;
-}
-
-
-/*
-** function to (not) close the standard files stdin, stdout, and stderr
-*/
-static int io_noclose (lua_State *L) {
-  lua_pushnil(L);
-  lua_pushliteral(L, "cannot close standard file");
-  return 2;
-}
-
-
-/*
-** function to close 'popen' files
-*/
-static int io_pclose (lua_State *L) {
-  FILE **p = tofilep(L);
-  int ok = lua_pclose(L, *p);
-  *p = NULL;
-  return pushresult(L, ok, NULL);
-}
-
-
-/*
-** function to close regular files
-*/
-static int io_fclose (lua_State *L) {
-  FILE **p = tofilep(L);
-  int ok = (fclose(*p) == 0);
-  *p = NULL;
-  return pushresult(L, ok, NULL);
-}
-
-
-static int aux_close (lua_State *L) {
-  lua_getfenv(L, 1);
-  lua_getfield(L, -1, "__close");
-  return (lua_tocfunction(L, -1))(L);
-}
-
-
-static int io_close (lua_State *L) {
-  if (lua_isnone(L, 1))
-    lua_rawgeti(L, LUA_ENVIRONINDEX, IO_OUTPUT);
-  tofile(L);  /* make sure argument is a file */
-  return aux_close(L);
-}
-
-
-static int io_gc (lua_State *L) {
-  FILE *f = *tofilep(L);
-  /* ignore closed files */
-  if (f != NULL)
-    aux_close(L);
-  return 0;
-}
-
-
-static int io_tostring (lua_State *L) {
-  FILE *f = *tofilep(L);
-  if (f == NULL)
-    lua_pushliteral(L, "file (closed)");
-  else
-    lua_pushfstring(L, "file (%p)", f);
-  return 1;
-}
-
-
-static int io_open (lua_State *L) {
-  const char *filename = luaL_checkstring(L, 1);
-  const char *mode = luaL_optstring(L, 2, "r");
-  FILE **pf = newfile(L);
-  *pf = fopen(filename, mode);
-  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
-}
-
-
-/*
-** this function has a separated environment, which defines the
-** correct __close for 'popen' files
-*/
-static int io_popen (lua_State *L) {
-  const char *filename = luaL_checkstring(L, 1);
-  const char *mode = luaL_optstring(L, 2, "r");
-  FILE **pf = newfile(L);
-  *pf = lua_popen(L, filename, mode);
-  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
-}
-
-
-static int io_tmpfile (lua_State *L) {
-  FILE **pf = newfile(L);
-  *pf = tmpfile();
-  return (*pf == NULL) ? pushresult(L, 0, NULL) : 1;
-}
-
-
-static FILE *getiofile (lua_State *L, int findex) {
-  FILE *f;
-  lua_rawgeti(L, LUA_ENVIRONINDEX, findex);
-  f = *(FILE **)lua_touserdata(L, -1);
-  if (f == NULL)
-    luaL_error(L, "standard %s file is closed", fnames[findex - 1]);
-  return f;
-}
-
-
-static int g_iofile (lua_State *L, int f, const char *mode) {
-  if (!lua_isnoneornil(L, 1)) {
-    const char *filename = lua_tostring(L, 1);
-    if (filename) {
-      FILE **pf = newfile(L);
-      *pf = fopen(filename, mode);
-      if (*pf == NULL)
-        fileerror(L, 1, filename);
-    }
-    else {
-      tofile(L);  /* check that it's a valid file handle */
-      lua_pushvalue(L, 1);
-    }
-    lua_rawseti(L, LUA_ENVIRONINDEX, f);
-  }
-  /* return current value */
-  lua_rawgeti(L, LUA_ENVIRONINDEX, 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);
-
-
-static void aux_lines (lua_State *L, int idx, int toclose) {
-  lua_pushvalue(L, idx);
-  lua_pushboolean(L, toclose);  /* close/not close file when finished */
-  lua_pushcclosure(L, io_readline, 2);
-}
-
-
-static int f_lines (lua_State *L) {
-  tofile(L);  /* check that it's a valid file handle */
-  aux_lines(L, 1, 0);
-  return 1;
-}
-
-
-static int io_lines (lua_State *L) {
-  if (lua_isnoneornil(L, 1)) {  /* no arguments? */
-    /* will iterate over default input */
-    lua_rawgeti(L, LUA_ENVIRONINDEX, IO_INPUT);
-    return f_lines(L);
-  }
-  else {
-    const char *filename = luaL_checkstring(L, 1);
-    FILE **pf = newfile(L);
-    *pf = fopen(filename, "r");
-    if (*pf == NULL)
-      fileerror(L, 1, filename);
-    aux_lines(L, lua_gettop(L), 1);
-    return 1;
-  }
-}
-
-
-/*
-** {======================================================
-** READ
-** =======================================================
-*/
-
-
-static int read_number (lua_State *L, FILE *f) {
-  lua_Number d;
-  if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) {
-    lua_pushnumber(L, d);
-    return 1;
-  }
-  else return 0;  /* read fails */
-}
-
-
-static int test_eof (lua_State *L, FILE *f) {
-  int c = getc(f);
-  ungetc(c, f);
-  lua_pushlstring(L, NULL, 0);
-  return (c != EOF);
-}
-
-
-static int read_line (lua_State *L, FILE *f) {
-  luaL_Buffer b;
-  luaL_buffinit(L, &b);
-  for (;;) {
-    size_t l;
-    char *p = luaL_prepbuffer(&b);
-    if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) {  /* eof? */
-      luaL_pushresult(&b);  /* close buffer */
-      return (lua_objlen(L, -1) > 0);  /* check whether read something */
-    }
-    l = strlen(p);
-    if (l == 0 || p[l-1] != '\n')
-      luaL_addsize(&b, l);
-    else {
-      luaL_addsize(&b, l - 1);  /* do not include `eol' */
-      luaL_pushresult(&b);  /* close buffer */
-      return 1;  /* read at least an `eol' */
-    }
-  }
-}
-
-
-static int read_chars (lua_State *L, FILE *f, size_t n) {
-  size_t rlen;  /* how much to read */
-  size_t nr;  /* number of chars actually read */
-  luaL_Buffer b;
-  luaL_buffinit(L, &b);
-  rlen = LUAL_BUFFERSIZE;  /* try to read that much each time */
-  do {
-    char *p = luaL_prepbuffer(&b);
-    if (rlen > n) rlen = n;  /* cannot read more than asked */
-    nr = fread(p, sizeof(char), rlen, f);
-    luaL_addsize(&b, nr);
-    n -= nr;  /* still have to read `n' chars */
-  } while (n > 0 && nr == rlen);  /* until end of count or eof */
-  luaL_pushresult(&b);  /* close buffer */
-  return (n == 0 || lua_objlen(L, -1) > 0);
-}
-
-
-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);
-    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)lua_tointeger(L, n);
-        success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
-      }
-      else {
-        const char *p = lua_tostring(L, n);
-        luaL_argcheck(L, p && p[0] == '*', n, "invalid option");
-        switch (p[1]) {
-          case 'n':  /* number */
-            success = read_number(L, f);
-            break;
-          case 'l':  /* line */
-            success = read_line(L, f);
-            break;
-          case 'a':  /* file */
-            read_chars(L, f, ~((size_t)0));  /* read MAX_SIZE_T chars */
-            success = 1; /* always success */
-            break;
-          default:
-            return luaL_argerror(L, n, "invalid format");
-        }
-      }
-    }
-  }
-  if (ferror(f))
-    return pushresult(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) {
-  FILE *f = *(FILE **)lua_touserdata(L, lua_upvalueindex(1));
-  int sucess;
-  if (f == NULL)  /* file is already closed? */
-    luaL_error(L, "file is already closed");
-  sucess = read_line(L, f);
-  if (ferror(f))
-    return luaL_error(L, "%s", strerror(errno));
-  if (sucess) return 1;
-  else {  /* EOF */
-    if (lua_toboolean(L, lua_upvalueindex(2))) {  /* 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) - 1;
-  int status = 1;
-  for (; nargs--; arg++) {
-    if (lua_type(L, arg) == LUA_TNUMBER) {
-      /* optimization: could be done exactly as for strings */
-      status = status &&
-          fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;
-    }
-    else {
-      size_t l;
-      const char *s = luaL_checklstring(L, arg, &l);
-      status = status && (fwrite(s, sizeof(char), l, f) == l);
-    }
-  }
-  return pushresult(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) {
-  return g_write(L, tofile(L), 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);
-  long offset = luaL_optlong(L, 3, 0);
-  op = fseek(f, offset, mode[op]);
-  if (op)
-    return pushresult(L, 0, NULL);  /* error */
-  else {
-    lua_pushinteger(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], sz);
-  return pushresult(L, res == 0, NULL);
-}
-
-
-
-static int io_flush (lua_State *L) {
-  return pushresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);
-}
-
-
-static int f_flush (lua_State *L) {
-  return pushresult(L, fflush(tofile(L)) == 0, NULL);
-}
-
-
-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}
-};
-
-
-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", io_gc},
-  {"__tostring", io_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_register(L, NULL, flib);  /* file methods */
-}
-
-
-static void createstdfile (lua_State *L, FILE *f, int k, const char *fname) {
-  *newfile(L) = f;
-  if (k > 0) {
-    lua_pushvalue(L, -1);
-    lua_rawseti(L, LUA_ENVIRONINDEX, k);
-  }
-  lua_pushvalue(L, -2);  /* copy environment */
-  lua_setfenv(L, -2);  /* set it */
-  lua_setfield(L, -3, fname);
-}
-
-
-static void newfenv (lua_State *L, lua_CFunction cls) {
-  lua_createtable(L, 0, 1);
-  lua_pushcfunction(L, cls);
-  lua_setfield(L, -2, "__close");
-}
-
-
-LUALIB_API int luaopen_io (lua_State *L) {
-  createmeta(L);
-  /* create (private) environment (with fields IO_INPUT, IO_OUTPUT, __close) */
-  newfenv(L, io_fclose);
-  lua_replace(L, LUA_ENVIRONINDEX);
-  /* open library */
-  luaL_register(L, LUA_IOLIBNAME, iolib);
-  /* create (and set) default files */
-  newfenv(L, io_noclose);  /* close function for default files */
-  createstdfile(L, stdin, IO_INPUT, "stdin");
-  createstdfile(L, stdout, IO_OUTPUT, "stdout");
-  createstdfile(L, stderr, 0, "stderr");
-  lua_pop(L, 1);  /* pop environment for default files */
-  lua_getfield(L, -1, "popen");
-  newfenv(L, io_pclose);  /* create environment for 'popen' */
-  lua_setfenv(L, -2);  /* set fenv for 'popen' */
-  lua_pop(L, 1);  /* pop 'popen' */
-  return 1;
-}
-