text: /*
   * POSIX library for Lua 5.1, 5.2 & 5.3.
   * Copyright (C) 2013-2018 Gary V. Vaughan
   * Copyright (C) 2010-2013 Reuben Thomas <rrt@sc3d.org>
   * Copyright (C) 2008-2010 Natanael Copa <natanael.copa@gmail.com>
   * Clean up and bug fixes by Leo Razoumov <slonik.az@gmail.com> 2006-10-11
   * Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br> 07 Apr 2006 23:17:49
   * Based on original by Claudio Terra for Lua 3.x.
   * With contributions by Roberto Ierusalimschy.
   * With documentation from Steve Donovan 2012
   */
  /***
   Directory Iterators.
  
  @module posix.dirent
  */
  
  #include <dirent.h>
  
  #include "_helpers.c"
  
  
  /***
  Contents of directory.
  @function dir
  @string[opt="."] path directory to act on
  @treturn table contents of *path*
  @see dir.lua
  */
  static int
  Pdir(lua_State *L)
  {
  	const char *path = optstring(L, 1, ".");
  	DIR *d;
  	checknargs(L, 1);
  	d = opendir(path);
  	/* Throw an argument error for consistency with eg. io.lines */
  	if (d == NULL)
  	{
  		const char *msg = strerror (errno);
  		msg = lua_pushfstring(L, "%s: %s", path, msg);
  		return luaL_argerror(L, 1, msg);
  	}
  	else
  	{
  		int i;
  		struct dirent *entry;
  		lua_newtable(L);
  		for (i=1; (entry = readdir(d)) != NULL; i++)
  		{
  			lua_pushstring(L, entry->d_name);
  			lua_rawseti(L, -2, i);
  		}
  		closedir(d);
  		return 1;
  	}
  }
  
  
  static int
  aux_files(lua_State *L)
  {
  	DIR **p = (DIR **)lua_touserdata(L, lua_upvalueindex(1));
  	DIR *d = *p;
  	struct dirent *entry;
  	if (d == NULL)
  		return 0;
  	entry = readdir(d);
  	if (entry == NULL)
  	{
  		closedir(d);
  		*p=NULL;
  		return 0;
  	}
  	return pushstringresult(entry->d_name);
  }
  
  
  static int
  dir_gc (lua_State *L)
  {
  	DIR *d = *(DIR **)lua_touserdata(L, 1);
  	if (d!=NULL)
  		closedir(d);
  	return 0;
  }
  
  
  /***
  Iterator over all files in named directory.
  @function files
  @string[opt="."] path directory to act on
  @return an iterator
  */
  static int
  Pfiles(lua_State *L)
  {
  	const char *path = optstring(L, 1, ".");
  	DIR **d;
  	checknargs(L, 1);
  	d = (DIR **)lua_newuserdata(L, sizeof(DIR *));
  	*d = opendir(path);
  	/* Throw an argument error for consistency with eg. io.lines */
  	if (*d == NULL)
  	{
  		const char *msg = strerror (errno);
  		msg = lua_pushfstring(L, "%s: %s", path, msg);
  		return luaL_argerror(L, 1, msg);
  	}
  	if (luaL_newmetatable(L, PACKAGE " dir handle"))
  	{
  		lua_pushcfunction(L, dir_gc);
  		lua_setfield(L, -2, "__gc");
  	}
  	lua_setmetatable(L, -2);
  	lua_pushcclosure(L, aux_files, 1);
  	return 1;
  }
  
  
  static const luaL_Reg posix_dirent_fns[] =
  {
  	LPOSIX_FUNC( Pdir		),
  	LPOSIX_FUNC( Pfiles		),
  	{NULL, NULL}
  };
  
  
  LUALIB_API int
  luaopen_posix_dirent(lua_State *L)
  {
  	luaL_newlib(L, posix_dirent_fns);
  	lua_pushstring(L, LPOSIX_VERSION_STRING("dirent"));
  	lua_setfield(L, -2, "version");
  
  	return 1;
  }
  