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/* Copyright (C) 1996-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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 <dlfcn.h>
#include <gconv.h>
#include <stdio.h>
#include <string.h>
#include <wchar.h>
#include <wcsmbsload.h>
#include <pointer_guard.h>
int
wctob (wint_t c)
{
unsigned char buf[MB_LEN_MAX];
struct __gconv_step_data data;
wchar_t inbuf[1];
wchar_t *inptr = inbuf;
size_t dummy;
int status;
const struct gconv_fcts *fcts;
if (c == WEOF)
return EOF;
/* We know that only ASCII compatible encodings are used for the
locale and that the wide character encoding is ISO 10646. */
if (c >= L'\0' && c <= L'\x7f')
return (int) c;
/* Tell where we want the result. */
data.__outbuf = buf;
data.__outbufend = buf + MB_LEN_MAX;
data.__invocation_counter = 0;
data.__internal_use = 1;
data.__flags = __GCONV_IS_LAST;
data.__statep = &data.__state;
/* Make sure we start in the initial state. */
memset (&data.__state, '\0', sizeof (mbstate_t));
/* Get the conversion functions. */
fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));
/* Create the input string. */
inbuf[0] = c;
const unsigned char *argptr = (const unsigned char *) inptr;
__gconv_fct fct = fcts->tomb->__fct;
if (fcts->tomb->__shlib_handle != NULL)
PTR_DEMANGLE (fct);
status = DL_CALL_FCT (fct,
(fcts->tomb, &data, &argptr,
argptr + sizeof (inbuf[0]), NULL, &dummy, 0, 1));
/* The conversion failed or the output is too long. */
if ((status != __GCONV_OK && status != __GCONV_FULL_OUTPUT
&& status != __GCONV_EMPTY_INPUT)
|| data.__outbuf != (unsigned char *) (buf + 1))
return EOF;
return buf[0];
}
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