iconv/gconv_close.c

   1 /* Release any resource associated with given conversion descriptor.
   2    Copyright (C) 1997, 1998 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <stdlib.h>
  22
  23 #include <gconv_int.h>
  24
  25
  26 int
  27 internal_function
  28 __gconv_close (gconv_t cd)
  29 {
  30   struct gconv_step *srunp;
  31   struct gconv_step_data *drunp;
  32   size_t nsteps;
  33
  34   /* Free all resources by calling destructor functions and release
  35      the implementations.  */
  36   srunp = cd->steps;
  37   nsteps = cd->nsteps;
  38   drunp = cd->data;
  39   do
  40     {
  41       if (!drunp->is_last && drunp->outbuf != NULL)
  42         free (drunp->outbuf);
  43     }
  44   while (!(drunp++)->is_last);
  45
  46   /* Free the data allocated for the descriptor.  */
  47   free (cd->data);
  48   free (cd);
  49
  50   /* Close the participating modules.  */
  51   return __gconv_close_transform (srunp, nsteps);
  52 }