71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/* Copyright (C) 1996, 1997, 1998, 1999 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 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 <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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wint_t
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__btowc (c)
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int c;
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{
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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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/* 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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/* 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.__is_last = 1;
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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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/* Make sure we use the correct function. */
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update_conversion_ptrs ();
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/* Create the input string. */
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inbuf[0] = c;
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status = (*__wcsmbs_gconv_fcts.towc->__fct) (__wcsmbs_gconv_fcts.towc, &data,
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&inptr, inptr + 1, &dummy, 0);
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/* The conversion failed. */
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if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT
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&& status != __GCONV_EMPTY_INPUT)
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result = WEOF;
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return result;
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}
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weak_alias (__btowc, btowc)
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