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61 lines
2.5 KiB
61 lines
2.5 KiB
/* Copyright (c) 2000, 2019, 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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/* Written by Sergei A. Golubchik, who has a shared copyright to this code */
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/**
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@file storage/myisam/fulltext.h
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Some definitions for full-text indices
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*/
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#include "ft_global.h"
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#include "mysql/plugin_ftparser.h"
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#include "storage/myisam/myisamdef.h"
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#define HA_FT_WTYPE HA_KEYTYPE_FLOAT
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#define HA_FT_WLEN 4
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#define FT_SEGS 2
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/**
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Accessor methods for the weight and the number of subkeys in a buffer.
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The weight is of float type and subkeys number is of integer type. Both
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are stored in the same position of the buffer and the stored object is
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identified by the sign (bit): the weight value is positive whilst the
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number of subkeys is negative.
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In light of C's strict-aliasing rules, which roughly state that an object
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must not be accessed through incompatible types, these methods are used to
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avoid any problems arising from the type duality inside the buffer. The
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values are retrieved using a character type which can access any object.
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*/
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#define ft_sintXkorr(A) mi_sint4korr(A)
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#define ft_intXstore(T, A) mi_int4store(T, A)
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#define ft_floatXget(M) mi_float4get(M)
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extern const HA_KEYSEG ft_keysegs[FT_SEGS];
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int _mi_ft_cmp(MI_INFO *, uint, const uchar *, const uchar *);
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int _mi_ft_add(MI_INFO *, uint, uchar *, const uchar *, my_off_t);
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int _mi_ft_del(MI_INFO *, uint, uchar *, const uchar *, my_off_t);
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uint _mi_ft_convert_to_ft2(MI_INFO *, uint, uchar *);
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