mirror of
https://sourceware.org/git/glibc.git
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ba7b4d294b
Prior to the 2.20 release, the function was just changed to fail
unconditionally, in commit a1a6a401ab.
This commit removes the function completely, including gconv bits
which depend on it.
This changes the gconv ABI, which is not a public interface.
102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/* Copyright (C) 1996-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <ctype.h>
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#include <dlfcn.h>
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#include <gconv.h>
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#include <stdio.h>
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#include <string.h>
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#include <wchar.h>
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#include <wcsmbsload.h>
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#include <limits.h>
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#include <sysdep.h>
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wint_t
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__btowc (c)
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int c;
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{
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const struct gconv_fcts *fcts;
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/* If the parameter does not fit into one byte or it is the EOF value
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we can give the answer now. */
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if (c < SCHAR_MIN || c > UCHAR_MAX || c == EOF)
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return WEOF;
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/* We know that only ASCII compatible encodings are used for the
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locale and that the wide character encoding is ISO 10646. */
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if (isascii (c))
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return (wint_t) c;
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/* Get the conversion functions. */
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fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));
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__gconv_btowc_fct btowc_fct = fcts->towc->__btowc_fct;
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if (__builtin_expect (fcts->towc_nsteps == 1, 1)
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&& __builtin_expect (btowc_fct != NULL, 1))
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{
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/* Use the shortcut function. */
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#ifdef PTR_DEMANGLE
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if (fcts->towc->__shlib_handle != NULL)
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PTR_DEMANGLE (btowc_fct);
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#endif
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return DL_CALL_FCT (btowc_fct, (fcts->towc, (unsigned char) c));
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}
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else
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{
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/* Fall back to the slow but generic method. */
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wchar_t result;
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struct __gconv_step_data data;
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unsigned char inbuf[1];
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const unsigned char *inptr = inbuf;
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size_t dummy;
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int status;
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/* Tell where we want the result. */
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data.__outbuf = (unsigned char *) &result;
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data.__outbufend = data.__outbuf + sizeof (wchar_t);
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data.__invocation_counter = 0;
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data.__internal_use = 1;
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data.__flags = __GCONV_IS_LAST;
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data.__statep = &data.__state;
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/* Make sure we start in the initial state. */
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memset (&data.__state, '\0', sizeof (mbstate_t));
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/* Create the input string. */
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inbuf[0] = c;
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__gconv_fct fct = fcts->towc->__fct;
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#ifdef PTR_DEMANGLE
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if (fcts->towc->__shlib_handle != NULL)
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PTR_DEMANGLE (fct);
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#endif
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status = DL_CALL_FCT (fct, (fcts->towc, &data, &inptr, inptr + 1,
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NULL, &dummy, 0, 1));
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if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT
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&& status != __GCONV_EMPTY_INPUT)
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/* The conversion failed. */
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result = WEOF;
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return result;
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}
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}
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weak_alias (__btowc, btowc)
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