mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 01:33:36 +08:00
80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/* 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];
|
|
}
|