iconv/gconv_close.c

   1 /* Release any resource associated with given conversion descriptor.
   2    Copyright (C) 1997-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stdlib.h>
  20
  21 #include <gconv_int.h>
  22
  23
  24 int
  25 __gconv_close (__gconv_t cd)
  26 {
  27   struct __gconv_step *srunp;
  28   struct __gconv_step_data *drunp;
  29   size_t nsteps;
  30
  31   /* Free all resources by calling destructor functions and release
  32      the implementations.  */
  33   srunp = cd->__steps;
  34   nsteps = cd->__nsteps;
  35   drunp = cd->__data;
  36   do
  37     {
  38       if (!(drunp->__flags & __GCONV_IS_LAST) && drunp->__outbuf != NULL)
  39         free (drunp->__outbuf);
  40     }
  41   while (!((drunp++)->__flags & __GCONV_IS_LAST));
  42
  43   /* Free the data allocated for the descriptor.  */
  44   free (cd);
  45
  46   /* Close the participating modules.  */
  47   return __gconv_close_transform (srunp, nsteps);
  48 }