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/* Convert characters in input buffer using conversion descriptor to
output buffer.
Copyright (C) 1997-2019 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <assert.h>
#include <dlfcn.h>
#include <stddef.h>
#include <sys/param.h>
#include <gconv_int.h>
#include <sysdep.h>
int
__gconv (__gconv_t cd, const unsigned char **inbuf,
const unsigned char *inbufend, unsigned char **outbuf,
unsigned char *outbufend, size_t *irreversible)
{
size_t last_step;
int result;
if (cd == (__gconv_t) -1L)
return __GCONV_ILLEGAL_DESCRIPTOR;
last_step = cd->__nsteps - 1;
assert (irreversible != NULL);
*irreversible = 0;
cd->__data[last_step].__outbuf = outbuf != NULL ? *outbuf : NULL;
cd->__data[last_step].__outbufend = outbufend;
__gconv_fct fct = cd->__steps->__fct;
#ifdef PTR_DEMANGLE
if (cd->__steps->__shlib_handle != NULL)
PTR_DEMANGLE (fct);
#endif
if (inbuf == NULL || *inbuf == NULL)
{
/* We just flush. */
result = DL_CALL_FCT (fct,
(cd->__steps, cd->__data, NULL, NULL, NULL,
irreversible,
cd->__data[last_step].__outbuf == NULL ? 2 : 1,
0));
/* If the flush was successful clear the rest of the state. */
if (result == __GCONV_OK)
for (size_t cnt = 0; cnt <= last_step; ++cnt)
cd->__data[cnt].__invocation_counter = 0;
}
else
{
const unsigned char *last_start;
assert (outbuf != NULL && *outbuf != NULL);
do
{
last_start = *inbuf;
result = DL_CALL_FCT (fct,
(cd->__steps, cd->__data, inbuf, inbufend,
NULL, irreversible, 0, 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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