iconv/gconv_close.c

   1 /* Release any resource associated with given conversion descriptor.
   2    Copyright (C) 1997, 1998, 1999, 2000 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 Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the 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    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    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       struct __gconv_trans_data *transp;
  42
  43       transp = drunp->__trans;
  44       while (transp != NULL)
  45         {
  46           struct __gconv_trans_data *curp = transp;
  47           transp = transp->__next;
  48
  49           if (__builtin_expect (curp->__trans_end_fct != NULL, 0))
  50             curp->__trans_end_fct (curp->__data);
  51
  52           free (curp);
  53         }
  54
  55       if (!(drunp->__flags & __GCONV_IS_LAST) && drunp->__outbuf != NULL)
  56         free (drunp->__outbuf);
  57     }
  58   while (!((drunp++)->__flags & __GCONV_IS_LAST));
  59
  60   /* Free the data allocated for the descriptor.  */
  61   free (cd);
  62
  63   /* Close the participating modules.  */
  64   return __gconv_close_transform (srunp, nsteps);
  65 }