1: /* Convert characters in input buffer using conversion descriptor to
    2:    output buffer.
    3:    Copyright (C) 1997-2001, 2005, 2007 Free Software Foundation, Inc.
    4:    This file is part of the GNU C Library.
    5:    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
    6: 
    7:    The GNU C Library is free software; you can redistribute it and/or
    8:    modify it under the terms of the GNU Lesser General Public
    9:    License as published by the Free Software Foundation; either
   10:    version 2.1 of the License, or (at your option) any later version.
   11: 
   12:    The GNU C Library is distributed in the hope that it will be useful,
   13:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   14:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   15:    Lesser General Public License for more details.
   16: 
   17:    You should have received a copy of the GNU Lesser General Public
   18:    License along with the GNU C Library; if not, write to the Free
   19:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   20:    02111-1307 USA.  */
   21: 
   22: #include <assert.h>
   23: #include <dlfcn.h>
   24: #include <stddef.h>
   25: #include <sys/param.h>
   26: 
   27: #include <gconv_int.h>
   28: #include <sysdep.h>
   29: 
   30: 
   31: int
   32: internal_function
   33: __gconv (__gconv_t cd, const unsigned char **inbuf,
   34:          const unsigned char *inbufend, unsigned char **outbuf,
   35:          unsigned char *outbufend, size_t *irreversible)
   36: {
   37:   size_t last_step;
   38:   int result;
   39: 
   40:   if (cd == (__gconv_t) -1L)
   41:     return __GCONV_ILLEGAL_DESCRIPTOR;
   42: 
   43:   last_step = cd->__nsteps - 1;
   44: 
   45:   assert (irreversible != NULL);
   46:   *irreversible = 0;
   47: 
   48:   cd->__data[last_step].__outbuf = outbuf != NULL ? *outbuf : NULL;
   49:   cd->__data[last_step].__outbufend = outbufend;
   50: 
   51:   __gconv_fct fct = cd->__steps->__fct;
   52: #ifdef PTR_DEMANGLE
   53:   if (cd->__steps->__shlib_handle != NULL)
   54:     PTR_DEMANGLE (fct);
   55: #endif
   56: 
   57:   if (inbuf == NULL || *inbuf == NULL)
   58:     {
   59:       /* We just flush.  */
   60:       result = DL_CALL_FCT (fct,
   61:                             (cd->__steps, cd->__data, NULL, NULL, NULL,
   62:                              irreversible,
   63:                              cd->__data[last_step].__outbuf == NULL ? 2 : 1,
   64:                              0));
   65: 
   66:       /* If the flush was successful clear the rest of the state.  */
   67:       if (result == __GCONV_OK)
   68:         for (size_t cnt = 0; cnt <= last_step; ++cnt)
   69:           cd->__data[cnt].__invocation_counter = 0;
   70:     }
   71:   else
   72:     {
   73:       const unsigned char *last_start;
   74: 
   75:       assert (outbuf != NULL && *outbuf != NULL);
   76: 
   77:       do
   78:         {
   79:           last_start = *inbuf;
   80:           result = DL_CALL_FCT (fct,
   81:                                 (cd->__steps, cd->__data, inbuf, inbufend,
   82:                                  NULL, irreversible, 0, 0));
   83:         }
   84:       while (result == __GCONV_EMPTY_INPUT && last_start != *inbuf
   85:              && *inbuf + cd->__steps->__min_needed_from <= inbufend);
   86:     }
   87: 
   88:   if (outbuf != NULL && *outbuf != NULL)
   89:     *outbuf = cd->__data[last_step].__outbuf;
   90: 
   91:   return result;
   92: }