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/* Convert characters in input buffer using conversion descriptor to
output buffer.
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <assert.h>
#include <gconv.h>
#include <sys/param.h>
int
internal_function
__gconv (gconv_t cd, const char **inbuf, const char *inbufend, char **outbuf,
char *outbufend, size_t *converted)
{
size_t last_step = cd->nsteps - 1;
int result;
if (cd == (gconv_t) -1L)
return GCONV_ILLEGAL_DESCRIPTOR;
assert (converted != NULL);
*converted = 0;
if (inbuf == NULL || *inbuf == NULL)
/* We just flush. */
result = (*cd->steps->fct) (cd->steps, cd->data, NULL, NULL, converted, 1);
else
{
const char *last_start;
assert (outbuf != NULL && *outbuf != NULL);
cd->data[last_step].outbuf = *outbuf;
cd->data[last_step].outbufend = outbufend;
do
{
/* See whether the input size is reasoable for the output
size. If not adjust it. */
size_t inlen = ((inbufend - *inbuf) / cd->steps->max_needed_from
* cd->steps->max_needed_from);
if (cd->nsteps > 1)
inlen = MIN (inlen, (((outbufend - cd->data[last_step].outbuf)
/ cd->steps[last_step].max_needed_to)
* cd->steps[last_step].max_needed_to));
last_start = *inbuf;
result = (*cd->steps->fct) (cd->steps, cd->data, inbuf,
*inbuf + inlen, converted, 0);
}
while (result == GCONV_EMPTY_INPUT && last_start != *inbuf
&& *inbuf + cd->steps->min_needed_from <= inbufend);
}
if (outbuf != NULL && *outbuf != NULL)
*outbuf = cd->data[last_step].outbuf;
return result;
}
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