misc/liblua/liolib.c
author dag10 <gottlieb.drew@gmail.com>
Wed, 16 Jan 2013 18:34:43 -0500
changeset 8393 85bd6c7b2641
parent 2812 0a24853de796
child 10017 de822cd3df3a
permissions -rw-r--r--
Can now change theme for static and mission maps. Fixed mission map descriptions that had commas which broke them. Now, you must escape commas in map descriptions. Made bgwidget repaint on animation tick to avoid buffer-not-clearing issue with widgets that change overtop the background leaving a ghost image of the widget's previous state. Generated map is now the default map in the mapconfig widget.
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/*
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** $Id: liolib.c,v 2.73.1.3 2008/01/18 17:47:43 roberto Exp $
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** Standard I/O (and system) library
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** See Copyright Notice in lua.h
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define liolib_c
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#define LUA_LIB
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#include "lua.h"
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#include "lauxlib.h"
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#include "lualib.h"
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#define IO_INPUT	1
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#define IO_OUTPUT	2
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static const char *const fnames[] = {"input", "output"};
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static int pushresult (lua_State *L, int i, const char *filename) {
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  int en = errno;  /* calls to Lua API may change this value */
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  if (i) {
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    lua_pushboolean(L, 1);
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    return 1;
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  }
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  else {
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    lua_pushnil(L);
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    if (filename)
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      lua_pushfstring(L, "%s: %s", filename, strerror(en));
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    else
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      lua_pushfstring(L, "%s", strerror(en));
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    lua_pushinteger(L, en);
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    return 3;
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  }
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}
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static void fileerror (lua_State *L, int arg, const char *filename) {
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  lua_pushfstring(L, "%s: %s", filename, strerror(errno));
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  luaL_argerror(L, arg, lua_tostring(L, -1));
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}
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#define tofilep(L)	((FILE **)luaL_checkudata(L, 1, LUA_FILEHANDLE))
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static int io_type (lua_State *L) {
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  void *ud;
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  luaL_checkany(L, 1);
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  ud = lua_touserdata(L, 1);
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  lua_getfield(L, LUA_REGISTRYINDEX, LUA_FILEHANDLE);
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  if (ud == NULL || !lua_getmetatable(L, 1) || !lua_rawequal(L, -2, -1))
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    lua_pushnil(L);  /* not a file */
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  else if (*((FILE **)ud) == NULL)
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    lua_pushliteral(L, "closed file");
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  else
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    lua_pushliteral(L, "file");
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  return 1;
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}
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static FILE *tofile (lua_State *L) {
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  FILE **f = tofilep(L);
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  if (*f == NULL)
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    luaL_error(L, "attempt to use a closed file");
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  return *f;
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}
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/*
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** When creating file handles, always creates a `closed' file handle
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** before opening the actual file; so, if there is a memory error, the
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** file is not left opened.
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*/
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static FILE **newfile (lua_State *L) {
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  FILE **pf = (FILE **)lua_newuserdata(L, sizeof(FILE *));
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  *pf = NULL;  /* file handle is currently `closed' */
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  luaL_getmetatable(L, LUA_FILEHANDLE);
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  lua_setmetatable(L, -2);
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  return pf;
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}
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/*
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** function to (not) close the standard files stdin, stdout, and stderr
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*/
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static int io_noclose (lua_State *L) {
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  lua_pushnil(L);
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  lua_pushliteral(L, "cannot close standard file");
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  return 2;
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}
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/*
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** function to close 'popen' files
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*/
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static int io_pclose (lua_State *L) {
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  FILE **p = tofilep(L);
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  int ok = lua_pclose(L, *p);
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  *p = NULL;
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  return pushresult(L, ok, NULL);
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}
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/*
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** function to close regular files
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*/
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static int io_fclose (lua_State *L) {
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  FILE **p = tofilep(L);
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  int ok = (fclose(*p) == 0);
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  *p = NULL;
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  return pushresult(L, ok, NULL);
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}
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static int aux_close (lua_State *L) {
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  lua_getfenv(L, 1);
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  lua_getfield(L, -1, "__close");
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  return (lua_tocfunction(L, -1))(L);
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}
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static int io_close (lua_State *L) {
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  if (lua_isnone(L, 1))
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    lua_rawgeti(L, LUA_ENVIRONINDEX, IO_OUTPUT);
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  tofile(L);  /* make sure argument is a file */
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  return aux_close(L);
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}
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static int io_gc (lua_State *L) {
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  FILE *f = *tofilep(L);
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  /* ignore closed files */
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  if (f != NULL)
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    aux_close(L);
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  return 0;
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}
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static int io_tostring (lua_State *L) {
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  FILE *f = *tofilep(L);
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  if (f == NULL)
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    lua_pushliteral(L, "file (closed)");
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  else
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    lua_pushfstring(L, "file (%p)", f);
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  return 1;
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}
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static int io_open (lua_State *L) {
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  const char *filename = luaL_checkstring(L, 1);
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  const char *mode = luaL_optstring(L, 2, "r");
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  FILE **pf = newfile(L);
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  *pf = fopen(filename, mode);
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  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
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}
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/*
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** this function has a separated environment, which defines the
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** correct __close for 'popen' files
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*/
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static int io_popen (lua_State *L) {
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  const char *filename = luaL_checkstring(L, 1);
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  const char *mode = luaL_optstring(L, 2, "r");
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  FILE **pf = newfile(L);
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  *pf = lua_popen(L, filename, mode);
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  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
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}
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static int io_tmpfile (lua_State *L) {
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  FILE **pf = newfile(L);
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  *pf = tmpfile();
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  return (*pf == NULL) ? pushresult(L, 0, NULL) : 1;
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}
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static FILE *getiofile (lua_State *L, int findex) {
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  FILE *f;
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  lua_rawgeti(L, LUA_ENVIRONINDEX, findex);
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  f = *(FILE **)lua_touserdata(L, -1);
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  if (f == NULL)
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    luaL_error(L, "standard %s file is closed", fnames[findex - 1]);
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  return f;
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}
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static int g_iofile (lua_State *L, int f, const char *mode) {
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  if (!lua_isnoneornil(L, 1)) {
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    const char *filename = lua_tostring(L, 1);
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    if (filename) {
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      FILE **pf = newfile(L);
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      *pf = fopen(filename, mode);
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      if (*pf == NULL)
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        fileerror(L, 1, filename);
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    }
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    else {
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      tofile(L);  /* check that it's a valid file handle */
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      lua_pushvalue(L, 1);
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    }
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    lua_rawseti(L, LUA_ENVIRONINDEX, f);
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  }
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  /* return current value */
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  lua_rawgeti(L, LUA_ENVIRONINDEX, f);
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  return 1;
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}
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static int io_input (lua_State *L) {
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  return g_iofile(L, IO_INPUT, "r");
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}
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static int io_output (lua_State *L) {
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  return g_iofile(L, IO_OUTPUT, "w");
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}
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static int io_readline (lua_State *L);
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static void aux_lines (lua_State *L, int idx, int toclose) {
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  lua_pushvalue(L, idx);
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   236
  lua_pushboolean(L, toclose);  /* close/not close file when finished */
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  lua_pushcclosure(L, io_readline, 2);
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}
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static int f_lines (lua_State *L) {
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   242
  tofile(L);  /* check that it's a valid file handle */
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   243
  aux_lines(L, 1, 0);
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  return 1;
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   245
}
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static int io_lines (lua_State *L) {
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   249
  if (lua_isnoneornil(L, 1)) {  /* no arguments? */
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   250
    /* will iterate over default input */
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   251
    lua_rawgeti(L, LUA_ENVIRONINDEX, IO_INPUT);
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   252
    return f_lines(L);
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   253
  }
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   254
  else {
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   255
    const char *filename = luaL_checkstring(L, 1);
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   256
    FILE **pf = newfile(L);
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   257
    *pf = fopen(filename, "r");
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   258
    if (*pf == NULL)
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   259
      fileerror(L, 1, filename);
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   260
    aux_lines(L, lua_gettop(L), 1);
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   261
    return 1;
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   262
  }
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   263
}
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   264
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/*
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   267
** {======================================================
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   268
** READ
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   269
** =======================================================
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   270
*/
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   271
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   272
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   273
static int read_number (lua_State *L, FILE *f) {
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   274
  lua_Number d;
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   275
  if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) {
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   276
    lua_pushnumber(L, d);
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   277
    return 1;
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   278
  }
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   279
  else return 0;  /* read fails */
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   280
}
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   281
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   282
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   283
static int test_eof (lua_State *L, FILE *f) {
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   284
  int c = getc(f);
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   285
  ungetc(c, f);
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   286
  lua_pushlstring(L, NULL, 0);
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   287
  return (c != EOF);
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   288
}
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   289
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   290
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   291
static int read_line (lua_State *L, FILE *f) {
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   292
  luaL_Buffer b;
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   293
  luaL_buffinit(L, &b);
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   294
  for (;;) {
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   295
    size_t l;
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   296
    char *p = luaL_prepbuffer(&b);
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diff changeset
   297
    if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) {  /* eof? */
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   298
      luaL_pushresult(&b);  /* close buffer */
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   299
      return (lua_objlen(L, -1) > 0);  /* check whether read something */
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   300
    }
0a24853de796 add liblua to sources for macosx
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   301
    l = strlen(p);
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diff changeset
   302
    if (l == 0 || p[l-1] != '\n')
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parents:
diff changeset
   303
      luaL_addsize(&b, l);
0a24853de796 add liblua to sources for macosx
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diff changeset
   304
    else {
0a24853de796 add liblua to sources for macosx
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diff changeset
   305
      luaL_addsize(&b, l - 1);  /* do not include `eol' */
0a24853de796 add liblua to sources for macosx
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parents:
diff changeset
   306
      luaL_pushresult(&b);  /* close buffer */
0a24853de796 add liblua to sources for macosx
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parents:
diff changeset
   307
      return 1;  /* read at least an `eol' */
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parents:
diff changeset
   308
    }
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diff changeset
   309
  }
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   310
}
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diff changeset
   311
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   312
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   313
static int read_chars (lua_State *L, FILE *f, size_t n) {
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diff changeset
   314
  size_t rlen;  /* how much to read */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   315
  size_t nr;  /* number of chars actually read */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   316
  luaL_Buffer b;
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koda
parents:
diff changeset
   317
  luaL_buffinit(L, &b);
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koda
parents:
diff changeset
   318
  rlen = LUAL_BUFFERSIZE;  /* try to read that much each time */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   319
  do {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   320
    char *p = luaL_prepbuffer(&b);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   321
    if (rlen > n) rlen = n;  /* cannot read more than asked */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   322
    nr = fread(p, sizeof(char), rlen, f);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   323
    luaL_addsize(&b, nr);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   324
    n -= nr;  /* still have to read `n' chars */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   325
  } while (n > 0 && nr == rlen);  /* until end of count or eof */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   326
  luaL_pushresult(&b);  /* close buffer */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   327
  return (n == 0 || lua_objlen(L, -1) > 0);
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koda
parents:
diff changeset
   328
}
0a24853de796 add liblua to sources for macosx
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parents:
diff changeset
   329
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   330
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   331
static int g_read (lua_State *L, FILE *f, int first) {
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koda
parents:
diff changeset
   332
  int nargs = lua_gettop(L) - 1;
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koda
parents:
diff changeset
   333
  int success;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   334
  int n;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   335
  clearerr(f);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   336
  if (nargs == 0) {  /* no arguments? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   337
    success = read_line(L, f);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   338
    n = first+1;  /* to return 1 result */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   339
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   340
  else {  /* ensure stack space for all results and for auxlib's buffer */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   341
    luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   342
    success = 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   343
    for (n = first; nargs-- && success; n++) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   344
      if (lua_type(L, n) == LUA_TNUMBER) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   345
        size_t l = (size_t)lua_tointeger(L, n);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   346
        success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
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koda
parents:
diff changeset
   347
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   348
      else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   349
        const char *p = lua_tostring(L, n);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   350
        luaL_argcheck(L, p && p[0] == '*', n, "invalid option");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   351
        switch (p[1]) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   352
          case 'n':  /* number */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   353
            success = read_number(L, f);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   354
            break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   355
          case 'l':  /* line */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   356
            success = read_line(L, f);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   357
            break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   358
          case 'a':  /* file */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   359
            read_chars(L, f, ~((size_t)0));  /* read MAX_SIZE_T chars */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   360
            success = 1; /* always success */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   361
            break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   362
          default:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   363
            return luaL_argerror(L, n, "invalid format");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   364
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   365
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   366
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   367
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   368
  if (ferror(f))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   369
    return pushresult(L, 0, NULL);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   370
  if (!success) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   371
    lua_pop(L, 1);  /* remove last result */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   372
    lua_pushnil(L);  /* push nil instead */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   373
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   374
  return n - first;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   375
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   376
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   377
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   378
static int io_read (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   379
  return g_read(L, getiofile(L, IO_INPUT), 1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   380
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   381
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   382
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   383
static int f_read (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   384
  return g_read(L, tofile(L), 2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   385
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   386
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   387
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   388
static int io_readline (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   389
  FILE *f = *(FILE **)lua_touserdata(L, lua_upvalueindex(1));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   390
  int sucess;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   391
  if (f == NULL)  /* file is already closed? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   392
    luaL_error(L, "file is already closed");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   393
  sucess = read_line(L, f);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   394
  if (ferror(f))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   395
    return luaL_error(L, "%s", strerror(errno));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   396
  if (sucess) return 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   397
  else {  /* EOF */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   398
    if (lua_toboolean(L, lua_upvalueindex(2))) {  /* generator created file? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   399
      lua_settop(L, 0);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   400
      lua_pushvalue(L, lua_upvalueindex(1));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   401
      aux_close(L);  /* close it */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   402
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   403
    return 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   404
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   405
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   406
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   407
/* }====================================================== */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   408
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   409
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   410
static int g_write (lua_State *L, FILE *f, int arg) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   411
  int nargs = lua_gettop(L) - 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   412
  int status = 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   413
  for (; nargs--; arg++) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   414
    if (lua_type(L, arg) == LUA_TNUMBER) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   415
      /* optimization: could be done exactly as for strings */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   416
      status = status &&
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   417
          fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   418
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   419
    else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   420
      size_t l;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   421
      const char *s = luaL_checklstring(L, arg, &l);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   422
      status = status && (fwrite(s, sizeof(char), l, f) == l);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   423
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   424
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   425
  return pushresult(L, status, NULL);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   426
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   427
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   428
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   429
static int io_write (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   430
  return g_write(L, getiofile(L, IO_OUTPUT), 1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   431
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   432
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   433
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   434
static int f_write (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   435
  return g_write(L, tofile(L), 2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   436
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   437
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   438
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   439
static int f_seek (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   440
  static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   441
  static const char *const modenames[] = {"set", "cur", "end", NULL};
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   442
  FILE *f = tofile(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   443
  int op = luaL_checkoption(L, 2, "cur", modenames);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   444
  long offset = luaL_optlong(L, 3, 0);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   445
  op = fseek(f, offset, mode[op]);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   446
  if (op)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   447
    return pushresult(L, 0, NULL);  /* error */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   448
  else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   449
    lua_pushinteger(L, ftell(f));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   450
    return 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   451
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   452
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   453
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   454
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   455
static int f_setvbuf (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   456
  static const int mode[] = {_IONBF, _IOFBF, _IOLBF};
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   457
  static const char *const modenames[] = {"no", "full", "line", NULL};
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   458
  FILE *f = tofile(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   459
  int op = luaL_checkoption(L, 2, NULL, modenames);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   460
  lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   461
  int res = setvbuf(f, NULL, mode[op], sz);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   462
  return pushresult(L, res == 0, NULL);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   463
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   464
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   465
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   466
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   467
static int io_flush (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   468
  return pushresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   469
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   470
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   471
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   472
static int f_flush (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   473
  return pushresult(L, fflush(tofile(L)) == 0, NULL);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   474
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   475
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   476
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   477
static const luaL_Reg iolib[] = {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   478
  {"close", io_close},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   479
  {"flush", io_flush},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   480
  {"input", io_input},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   481
  {"lines", io_lines},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   482
  {"open", io_open},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   483
  {"output", io_output},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   484
  {"popen", io_popen},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   485
  {"read", io_read},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   486
  {"tmpfile", io_tmpfile},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   487
  {"type", io_type},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   488
  {"write", io_write},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   489
  {NULL, NULL}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   490
};
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   491
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   492
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   493
static const luaL_Reg flib[] = {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   494
  {"close", io_close},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   495
  {"flush", f_flush},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   496
  {"lines", f_lines},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   497
  {"read", f_read},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   498
  {"seek", f_seek},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   499
  {"setvbuf", f_setvbuf},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   500
  {"write", f_write},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   501
  {"__gc", io_gc},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   502
  {"__tostring", io_tostring},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   503
  {NULL, NULL}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   504
};
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   505
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   506
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   507
static void createmeta (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   508
  luaL_newmetatable(L, LUA_FILEHANDLE);  /* create metatable for file handles */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   509
  lua_pushvalue(L, -1);  /* push metatable */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   510
  lua_setfield(L, -2, "__index");  /* metatable.__index = metatable */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   511
  luaL_register(L, NULL, flib);  /* file methods */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   512
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   513
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   514
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   515
static void createstdfile (lua_State *L, FILE *f, int k, const char *fname) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   516
  *newfile(L) = f;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   517
  if (k > 0) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   518
    lua_pushvalue(L, -1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   519
    lua_rawseti(L, LUA_ENVIRONINDEX, k);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   520
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   521
  lua_pushvalue(L, -2);  /* copy environment */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   522
  lua_setfenv(L, -2);  /* set it */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   523
  lua_setfield(L, -3, fname);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   524
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   525
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   526
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   527
static void newfenv (lua_State *L, lua_CFunction cls) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   528
  lua_createtable(L, 0, 1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   529
  lua_pushcfunction(L, cls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   530
  lua_setfield(L, -2, "__close");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   531
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   532
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   533
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   534
LUALIB_API int luaopen_io (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   535
  createmeta(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   536
  /* create (private) environment (with fields IO_INPUT, IO_OUTPUT, __close) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   537
  newfenv(L, io_fclose);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   538
  lua_replace(L, LUA_ENVIRONINDEX);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   539
  /* open library */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   540
  luaL_register(L, LUA_IOLIBNAME, iolib);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   541
  /* create (and set) default files */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   542
  newfenv(L, io_noclose);  /* close function for default files */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   543
  createstdfile(L, stdin, IO_INPUT, "stdin");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   544
  createstdfile(L, stdout, IO_OUTPUT, "stdout");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   545
  createstdfile(L, stderr, 0, "stderr");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   546
  lua_pop(L, 1);  /* pop environment for default files */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   547
  lua_getfield(L, -1, "popen");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   548
  newfenv(L, io_pclose);  /* create environment for 'popen' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   549
  lua_setfenv(L, -2);  /* set fenv for 'popen' */
0a24853de796 add liblua to sources for macosx
koda
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  lua_pop(L, 1);  /* pop 'popen' */
0a24853de796 add liblua to sources for macosx
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  return 1;
0a24853de796 add liblua to sources for macosx
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}
0a24853de796 add liblua to sources for macosx
koda
parents:
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   553