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glibc  2.9
gconv_close.c
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00001 /* Release any resource associated with given conversion descriptor.
00002    Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include <stdlib.h>
00022 
00023 #include <gconv_int.h>
00024 
00025 
00026 int
00027 internal_function
00028 __gconv_close (__gconv_t cd)
00029 {
00030   struct __gconv_step *srunp;
00031   struct __gconv_step_data *drunp;
00032   size_t nsteps;
00033 
00034   /* Free all resources by calling destructor functions and release
00035      the implementations.  */
00036   srunp = cd->__steps;
00037   nsteps = cd->__nsteps;
00038   drunp = cd->__data;
00039   do
00040     {
00041       struct __gconv_trans_data *transp;
00042 
00043       transp = drunp->__trans;
00044       while (transp != NULL)
00045        {
00046          struct __gconv_trans_data *curp = transp;
00047          transp = transp->__next;
00048 
00049          if (__builtin_expect (curp->__trans_end_fct != NULL, 0))
00050            curp->__trans_end_fct (curp->__data);
00051 
00052          free (curp);
00053        }
00054 
00055       if (!(drunp->__flags & __GCONV_IS_LAST) && drunp->__outbuf != NULL)
00056        free (drunp->__outbuf);
00057     }
00058   while (!((drunp++)->__flags & __GCONV_IS_LAST));
00059 
00060   /* Free the data allocated for the descriptor.  */
00061   free (cd);
00062 
00063   /* Close the participating modules.  */
00064   return __gconv_close_transform (srunp, nsteps);
00065 }