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57 lines
2.2 KiB
57 lines
2.2 KiB
/* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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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, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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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, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#include "sql/dd/dd_utility.h"
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#include "m_ctype.h"
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namespace dd {
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///////////////////////////////////////////////////////////////////////////
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size_t normalize_string(const CHARSET_INFO *cs, const String_type &src,
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char *normalized_str_buf,
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size_t normalized_str_buf_length) {
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/*
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Count exact number of characters in the string and adjust output buffer
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size according to it to avoid my_strnxfrm() padding result buffer with
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spaces(sort weights corresponding to spaces).
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*/
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size_t len = cs->coll->strnxfrmlen(
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cs, (cs->mbmaxlen *
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cs->cset->numchars(cs, src.c_str(), src.c_str() + src.length())));
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if (len > normalized_str_buf_length) return 0;
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/*
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Normalize the src.
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Store weights corresponding to each character of "src" in the result
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buffer.
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*/
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my_strnxfrm(cs, reinterpret_cast<uchar *>(normalized_str_buf), len,
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reinterpret_cast<const uchar *>(src.c_str()), src.length());
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return len;
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}
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///////////////////////////////////////////////////////////////////////////
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} // namespace dd
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