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69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
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/* Copyright (C) 1995 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 <mbstr.h>
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#include <stdlib.h>
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#define __need_wchar_t
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/* FIXME: should be defined in stddef.h.
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!!! #define __need_uwchar_t */
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typedef unsigned int uwchar_t;
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#include <stddef.h>
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/* Compare N characters of MBS1 and MBS2. */
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int
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mbsncmp (mbs1, mbs2, n)
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const char *mbs1;
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const char *mbs2;
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size_t n;
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{
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size_t len = 0;
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int clen1 = 0;
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int clen2 = 0;
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uwchar_t c1;
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uwchar_t c2;
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if (n == 0)
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return 0;
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/* Reset multibyte characters to their initial state. */
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(void) mblen ((char *) NULL, 0);
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do
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{
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clen1 = mbtowc ((wchar_t *) &c1, mbs1, MB_CUR_MAX);
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clen2 = mbtowc ((wchar_t *) &c2, mbs2, MB_CUR_MAX);
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if (clen1 == 0)
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return clen2 == 0 ? 0 : -1;
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if (clen2 == 0)
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return 1;
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if (clen1 < 0 || clen2 < 0)
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/* FIXME: an illegal character appears. What to do? */
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return c1 - c2;
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mbs1 += clen1;
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mbs2 += clen2;
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}
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while (c1 == c2 && ++len < n);
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return len < n ? c1 - c2 : 0;
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}
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