Mercurial > octave
view libinterp/corefcn/getgrent.cc @ 21747:61f3575250e4
rats: Fix round-off corner case for 32-bit systems (bug #47964)
* pr-output.cc (rational_approx): Invert convergence test to prevent
aborting early due to round-off error in 32-bit environments. Use std::abs
instead of fabs.
author | Mike Miller <mtmiller@octave.org> |
---|---|
date | Thu, 19 May 2016 15:47:24 -0700 |
parents | c218a5b31ad7 |
children | 2aef506f3fec |
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/* Copyright (C) 1996-2015 John W. Eaton This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <string> #include <sys/types.h> #include "oct-group.h" #include "defun.h" #include "error.h" #include "errwarn.h" #include "oct-map.h" #include "ov.h" #include "ovl.h" #include "utils.h" // Group file functions. (Why not?) static octave_value mk_gr_map (const octave::sys::group& gr) { octave_value retval; if (gr) { octave_scalar_map m; m.assign ("name", gr.name ()); m.assign ("passwd", gr.passwd ()); m.assign ("gid", static_cast<double> (gr.gid ())); m.assign ("mem", octave_value (gr.mem ())); retval = ovl (m); } else retval = ovl (0); return retval; } DEFUN (getgrent, args, , "-*- texinfo -*-\n\ @deftypefn {} {@var{grp_struct} =} getgrent ()\n\ Return an entry from the group database, opening it if necessary.\n\ \n\ Once the end of data has been reached, @code{getgrent} returns 0.\n\ @seealso{setgrent, endgrent}\n\ @end deftypefn") { if (args.length () != 0) print_usage (); std::string msg; // octave::sys::group::getgrent may set msg. octave_value val = mk_gr_map (octave::sys::group::getgrent (msg)); return ovl (val, msg); } DEFUN (getgrgid, args, , "-*- texinfo -*-\n\ @deftypefn {} {@var{grp_struct} =} getgrgid (@var{gid}).\n\ Return the first entry from the group database with the group ID\n\ @var{gid}.\n\ \n\ If the group ID does not exist in the database, @code{getgrgid} returns 0.\n\ @seealso{getgrnam}\n\ @end deftypefn") { if (args.length () != 1) print_usage (); double dval = args(0).double_value (); if (D_NINT (dval) != dval) error ("getgrgid: GID must be an integer"); gid_t gid = static_cast<gid_t> (dval); std::string msg; // octave::sys::group::getgrgid may set msg. octave_value val = mk_gr_map (octave::sys::group::getgrgid (gid, msg)); return ovl (val, msg); } DEFUN (getgrnam, args, , "-*- texinfo -*-\n\ @deftypefn {} {@var{grp_struct} =} getgrnam (@var{name})\n\ Return the first entry from the group database with the group name\n\ @var{name}.\n\ \n\ If the group name does not exist in the database, @code{getgrnam} returns 0.\n\ @seealso{getgrgid}\n\ @end deftypefn") { if (args.length () != 1) print_usage (); std::string s = args(0).string_value (); std::string msg; // octave::sys::group::getgrnam may set msg. octave_value val = mk_gr_map (octave::sys::group::getgrnam (s.c_str (), msg)); return ovl (val, msg); } DEFUN (setgrent, args, , "-*- texinfo -*-\n\ @deftypefn {} {} setgrent ()\n\ Return the internal pointer to the beginning of the group database.\n\ @seealso{getgrent, endgrent}\n\ @end deftypefn") { if (args.length () != 0) print_usage (); std::string msg; // octave::sys::group::setgrent may set msg. int status = octave::sys::group::setgrent (msg); return ovl (static_cast<double> (status), msg); } DEFUN (endgrent, args, , "-*- texinfo -*-\n\ @deftypefn {} {} endgrent ()\n\ Close the group database.\n\ @seealso{getgrent, setgrent}\n\ @end deftypefn") { if (args.length () != 0) print_usage (); std::string msg; // octave::sys::group::endgrent may set msg. int status = octave::sys::group::endgrent (msg); return ovl (static_cast<double> (status), msg); }