111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/* Copyright (C) 1996, 1997, 1998, 2000 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@cygnus.com>, 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <gconv.h>
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#include <stdlib.h>
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#include <wchar.h>
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#include <wcsmbsload.h>
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#include <assert.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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__wcrtomb (char *s, wchar_t wc, mbstate_t *ps)
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{
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mbstate_t temp_state;
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char buf[MB_CUR_MAX];
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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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/* Tell where we want the result. */
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data.__outbuf = s;
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data.__outbufend = s + MB_CUR_MAX;
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data.__invocation_counter = 0;
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data.__internal_use = 1;
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data.__is_last = 1;
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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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data.__outbuf = buf;
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wc = L'\0';
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temp_state = *data.__statep;
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data.__statep = &temp_state;
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}
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/* Make sure we use the correct function. */
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update_conversion_ptrs ();
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/* If WC is the NUL character we write into the output buffer the byte
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sequence necessary for PS to get into the initial state, followed
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by a NUL byte. */
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if (wc == L'\0')
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{
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status = (*__wcsmbs_gconv_fcts.tomb->__fct) (__wcsmbs_gconv_fcts.tomb,
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&data, NULL, NULL,
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&dummy, 1, 1);
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if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT)
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*data.__outbuf++ = '\0';
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}
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else
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{
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/* Do a normal conversion. */
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const unsigned char *inbuf = (const unsigned char *) &wc;
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status = (*__wcsmbs_gconv_fcts.tomb->__fct) (__wcsmbs_gconv_fcts.tomb,
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&data, &inbuf,
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inbuf + sizeof (wchar_t),
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&dummy, 0, 1);
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}
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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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result = data.__outbuf - (unsigned char *) (s ?: buf);
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else
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{
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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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weak_alias (__wcrtomb, wcrtomb)
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