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/* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
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 <errno.h>
#include <gconv.h>
#include <stdlib.h>
#include <wchar.h>
#include <wcsmbsload.h>
#include <assert.h>
#ifndef EILSEQ
# define EILSEQ EINVAL
#endif
/* This is the private state used if PS is NULL. */
static mbstate_t state;
size_t
__wcrtomb (char *s, wchar_t wc, mbstate_t *ps)
{
char buf[MB_CUR_MAX];
struct gconv_step_data data;
int status;
size_t result;
/* Tell where we want the result. */
data.outbuf = s;
data.outbufavail = 0;
data.outbufsize = MB_CUR_MAX;
data.is_last = 1;
data.statep = ps ?: &state;
/* A first special case is if S is NULL. This means put PS in the
initial state. */
if (s == NULL)
{
data.outbuf = buf;
wc = L'\0';
}
/* Make sure we use the correct function. */
update_conversion_ptrs ();
/* If WC is the NUL character we write into the output buffer the byte
sequence necessary for PS to get into the initial state, followed
by a NUL byte. */
if (wc == L'\0')
{
size_t inbytes = 0;
status = (*__wcsmbs_gconv_fcts.tomb->fct) (__wcsmbs_gconv_fcts.tomb,
&data, NULL, &inbytes,
NULL, 1);
if (status == GCONV_OK || status == GCONV_EMPTY_INPUT)
data.outbuf[data.outbufavail++] = '\0';
}
else
{
/* Do a normal conversion. */
size_t inbytes = sizeof (wchar_t);
status = (*__wcsmbs_gconv_fcts.tomb->fct) (__wcsmbs_gconv_fcts.tomb,
&data, (char *) &wc, &inbytes,
NULL, 0);
}
/* There must not be any problems with the conversion but illegal input
characters. The output buffer must be large enough, otherwise the
definition of MB_CUR_MAX is not correct. All the other possible
errors also must not happen. */
assert (status == GCONV_OK || status == GCONV_EMPTY_INPUT
|| status == GCONV_ILLEGAL_INPUT
|| status == GCONV_INCOMPLETE_INPUT
|| status == GCONV_FULL_OUTPUT);
if (status == GCONV_OK || status == GCONV_EMPTY_INPUT
|| status == GCONV_FULL_OUTPUT)
result = data.outbufavail;
else
{
result = (size_t) -1;
__set_errno (EILSEQ);
}
return result;
}
weak_alias (__wcrtomb, wcrtomb)
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