57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
/* Copyright (C) 1991, 1992, 1995, 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <stdlib.h>
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#include <wchar.h>
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/* Common state for all non-restartable conversion functions. */
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mbstate_t __no_r_state;
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/* Convert the multibyte character at S, which is no longer
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than N characters, to its `wchar_t' representation, placing
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this n *PWC and returning its length.
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Attention: this function should NEVER be intentionally used.
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The interface is completely stupid. The state is shared between
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all conversion functions. You should use instead the restartable
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version `mbrtowc'. */
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int
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mbtowc (wchar_t *pwc, const char *s, size_t n)
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{
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int result;
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/* If S is NULL the function has to return null or not null
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depending on the encoding having a state depending encoding or
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not. This is nonsense because any multibyte encoding has a
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state. The ISO C amendment 1 corrects this while introducing the
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restartable functions. We simply say here all encodings have a
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state. */
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if (s == NULL)
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return 1;
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result = __mbrtowc (pwc, s, n, &__no_r_state);
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/* The `mbrtowc' functions tell us more than we need. Fold the -1
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and -2 result into -1. */
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if (result < 0)
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result = -1;
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return result;
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}
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