63 lines
2.0 KiB
C
Executable File
63 lines
2.0 KiB
C
Executable File
/* Search for some characters in UTF-8/UTF-16/UTF-32 string.
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Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2002.
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This file is free software.
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It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
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You can redistribute it and/or modify it under either
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- the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation, either version 3, or (at your
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option) any later version, or
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- the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option)
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any later version, or
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- the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
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This file 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 and the GNU General Public License
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for more details.
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You should have received a copy of the GNU Lesser General Public
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License and of the GNU General Public License along with this
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program. If not, see <https://www.gnu.org/licenses/>. */
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size_t
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FUNC (const UNIT *str, const UNIT *accept)
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{
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/* Optimize two cases. */
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if (accept[0] == 0)
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return 0;
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{
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ucs4_t uc;
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int count = U_STRMBTOUC (&uc, accept);
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if (count >= 0 && accept[count] == 0)
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{
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const UNIT *ptr = str;
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for (; *ptr != 0; ptr += count)
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if (U_CMP (ptr, accept, count) != 0)
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break;
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return ptr - str;
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}
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}
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/* General case. */
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{
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const UNIT *ptr = str;
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for (;;)
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{
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ucs4_t uc;
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int count = U_STRMBTOUC (&uc, ptr);
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if (count == 0)
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return ptr - str;
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if (count < 0)
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break;
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if (!U_STRCHR (accept, uc))
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return ptr - str;
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ptr += count;
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}
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return U_STRLEN (str);
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}
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}
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