70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
/*
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* Copyright 2003-2021 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "CaseFold.hxx"
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#include "config.h"
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#ifdef HAVE_ICU_CASE_FOLD
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#include "util/AllocatedString.hxx"
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#ifdef HAVE_ICU
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#include "Util.hxx"
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#include "util/AllocatedArray.hxx"
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#include <unicode/ucol.h>
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#include <unicode/ustring.h>
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#else
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#include <algorithm>
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#endif
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#include <memory>
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#include <string.h>
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AllocatedString
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IcuCaseFold(std::string_view src) noexcept
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try {
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#ifdef HAVE_ICU
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const auto u = UCharFromUTF8(src);
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if (u.IsNull())
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return AllocatedString(src);
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AllocatedArray<UChar> folded(u.size() * 2U);
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UErrorCode error_code = U_ZERO_ERROR;
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size_t folded_length = u_strFoldCase(folded.begin(), folded.size(),
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u.begin(), u.size(),
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U_FOLD_CASE_DEFAULT,
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&error_code);
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if (folded_length == 0 || error_code != U_ZERO_ERROR)
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return AllocatedString(src);
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folded.SetSize(folded_length);
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return UCharToUTF8({folded.begin(), folded.size()});
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#else
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#error not implemented
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#endif
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} catch (...) {
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return AllocatedString(src);
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}
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#endif /* HAVE_ICU_CASE_FOLD */
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