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.
127 lines
3.6 KiB
C
127 lines
3.6 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 <assert.h>
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#include <dlfcn.h>
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#include <errno.h>
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#include <gconv.h>
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#include <wchar.h>
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#include <wcsmbsload.h>
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#include <sysdep.h>
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#ifndef EILSEQ
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# define EILSEQ EINVAL
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#endif
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/* This is the private state used if PS is NULL. */
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static mbstate_t state;
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size_t
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__mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
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{
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wchar_t buf[1];
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struct __gconv_step_data data;
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int status;
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size_t result;
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size_t dummy;
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const unsigned char *inbuf, *endbuf;
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unsigned char *outbuf = (unsigned char *) (pwc ?: buf);
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const struct gconv_fcts *fcts;
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/* Set information for this step. */
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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 = ps ?: &state;
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/* A first special case is if S is NULL. This means put PS in the
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initial state. */
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if (s == NULL)
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{
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outbuf = (unsigned char *) buf;
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s = "";
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n = 1;
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}
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/* Tell where we want the result. */
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data.__outbuf = outbuf;
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data.__outbufend = outbuf + sizeof (wchar_t);
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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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/* Do a normal conversion. */
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inbuf = (const unsigned char *) s;
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endbuf = inbuf + n;
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if (__glibc_unlikely (endbuf < inbuf))
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{
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endbuf = (const unsigned char *) ~(uintptr_t) 0;
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if (endbuf == inbuf)
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goto ilseq;
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}
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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, &inbuf, endbuf,
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NULL, &dummy, 0, 1));
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/* There must not be any problems with the conversion but illegal input
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characters. The output buffer must be large enough, otherwise the
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definition of MB_CUR_MAX is not correct. All the other possible
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errors also must not happen. */
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assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
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|| status == __GCONV_ILLEGAL_INPUT
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|| status == __GCONV_INCOMPLETE_INPUT
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|| status == __GCONV_FULL_OUTPUT);
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if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
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|| status == __GCONV_FULL_OUTPUT)
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{
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if (data.__outbuf != (unsigned char *) outbuf
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&& *(wchar_t *) outbuf == L'\0')
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{
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/* The converted character is the NUL character. */
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assert (__mbsinit (data.__statep));
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result = 0;
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}
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else
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result = inbuf - (const unsigned char *) s;
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}
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else if (status == __GCONV_INCOMPLETE_INPUT)
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result = (size_t) -2;
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else
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{
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ilseq:
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result = (size_t) -1;
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__set_errno (EILSEQ);
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}
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return result;
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}
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libc_hidden_def (__mbrtowc)
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weak_alias (__mbrtowc, mbrtowc)
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libc_hidden_weak (mbrtowc)
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/* There should be no difference between the UTF-32 handling required
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by mbrtoc32 and the wchar_t handling which has long since been
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implemented in mbrtowc. */
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weak_alias (__mbrtowc, mbrtoc32)
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