mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
/* Copyright (C) 1996-2019 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.
|
|
|
|
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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <ctype.h>
|
|
#include <dlfcn.h>
|
|
#include <gconv.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <wchar.h>
|
|
#include <wcsmbsload.h>
|
|
#include <limits.h>
|
|
|
|
#include <sysdep.h>
|
|
|
|
|
|
wint_t
|
|
__btowc (int c)
|
|
{
|
|
const struct gconv_fcts *fcts;
|
|
|
|
/* If the parameter does not fit into one byte or it is the EOF value
|
|
we can give the answer now. */
|
|
if (c < SCHAR_MIN || c > UCHAR_MAX || c == EOF)
|
|
return WEOF;
|
|
|
|
/* We know that only ASCII compatible encodings are used for the
|
|
locale and that the wide character encoding is ISO 10646. */
|
|
if (isascii (c))
|
|
return (wint_t) c;
|
|
|
|
/* Get the conversion functions. */
|
|
fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));
|
|
__gconv_btowc_fct btowc_fct = fcts->towc->__btowc_fct;
|
|
#ifdef PTR_DEMANGLE
|
|
if (fcts->towc->__shlib_handle != NULL)
|
|
PTR_DEMANGLE (btowc_fct);
|
|
#endif
|
|
|
|
if (__builtin_expect (fcts->towc_nsteps == 1, 1)
|
|
&& __builtin_expect (btowc_fct != NULL, 1))
|
|
{
|
|
/* Use the shortcut function. */
|
|
return DL_CALL_FCT (btowc_fct, (fcts->towc, (unsigned char) c));
|
|
}
|
|
else
|
|
{
|
|
/* Fall back to the slow but generic method. */
|
|
wchar_t result;
|
|
struct __gconv_step_data data;
|
|
unsigned char inbuf[1];
|
|
const unsigned char *inptr = inbuf;
|
|
size_t dummy;
|
|
int status;
|
|
|
|
/* Tell where we want the result. */
|
|
data.__outbuf = (unsigned char *) &result;
|
|
data.__outbufend = data.__outbuf + sizeof (wchar_t);
|
|
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));
|
|
|
|
/* Create the input string. */
|
|
inbuf[0] = c;
|
|
|
|
__gconv_fct fct = fcts->towc->__fct;
|
|
#ifdef PTR_DEMANGLE
|
|
if (fcts->towc->__shlib_handle != NULL)
|
|
PTR_DEMANGLE (fct);
|
|
#endif
|
|
status = DL_CALL_FCT (fct, (fcts->towc, &data, &inptr, inptr + 1,
|
|
NULL, &dummy, 0, 1));
|
|
|
|
if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT
|
|
&& status != __GCONV_EMPTY_INPUT)
|
|
/* The conversion failed. */
|
|
result = WEOF;
|
|
|
|
return result;
|
|
}
|
|
}
|
|
weak_alias (__btowc, btowc)
|