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/*****************************************************************************
Copyright (c) 2007, 2015, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2017, 2018, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
*****************************************************************************/
/******************************************************************//**
@file include/fts0types.ic
Full text search types.
Created 2007-03-27 Sunny Bains
*******************************************************/
#ifndef INNOBASE_FTS0TYPES_IC
#define INNOBASE_FTS0TYPES_IC
/******************************************************************//**
Duplicate a string.
@return < 0 if n1 < n2, 0 if n1 == n2, > 0 if n1 > n2 */
UNIV_INLINE
void
fts_string_dup(
/*===========*/
fts_string_t* dst, /*!< in: dup to here */
const fts_string_t* src, /*!< in: src string */
mem_heap_t* heap) /*!< in: heap to use */
{
dst->f_str = (byte*)mem_heap_alloc(heap, src->f_len + 1);
memcpy(dst->f_str, src->f_str, src->f_len);
dst->f_len = src->f_len;
dst->f_str[src->f_len] = 0;
dst->f_n_char = src->f_n_char;
}
/******************************************************************//**
Compare two fts_trx_row_t doc_ids.
@return < 0 if n1 < n2, 0 if n1 == n2, > 0 if n1 > n2 */
UNIV_INLINE
int
fts_trx_row_doc_id_cmp(
/*===================*/
const void* p1, /*!< in: id1 */
const void* p2) /*!< in: id2 */
{
const fts_trx_row_t* tr1 = (const fts_trx_row_t*) p1;
const fts_trx_row_t* tr2 = (const fts_trx_row_t*) p2;
return((int)(tr1->doc_id - tr2->doc_id));
}
/******************************************************************//**
Compare two fts_ranking_t doc_ids.
@return < 0 if n1 < n2, 0 if n1 == n2, > 0 if n1 > n2 */
UNIV_INLINE
int
fts_ranking_doc_id_cmp(
/*===================*/
const void* p1, /*!< in: id1 */
const void* p2) /*!< in: id2 */
{
const fts_ranking_t* rk1 = (const fts_ranking_t*) p1;
const fts_ranking_t* rk2 = (const fts_ranking_t*) p2;
return((int)(rk1->doc_id - rk2->doc_id));
}
/******************************************************************//**
Compare two doc_ids.
@return < 0 if n1 < n2, 0 if n1 == n2, > 0 if n1 > n2 */
UNIV_INLINE
int fts_doc_id_cmp(
/*==================*/
const void* p1, /*!< in: id1 */
const void* p2) /*!< in: id2 */
{
const doc_id_t* up1 = static_cast<const doc_id_t*>(p1);
const doc_id_t* up2 = static_cast<const doc_id_t*>(p2);
return static_cast<int>(*up1 - *up2);
}
/******************************************************************//**
Get the first character's code position for FTS index partition */
extern
ulint
innobase_strnxfrm(
/*==============*/
const CHARSET_INFO* cs, /*!< in: Character set */
const uchar* p2, /*!< in: string */
const ulint len2); /*!< in: string length */
/** Check if fts index charset is cjk
@param[in] cs charset
@retval true if the charset is cjk
@retval false if not. */
inline bool fts_is_charset_cjk(const CHARSET_INFO* cs)
{
switch (cs->number) {
case 24: /* my_charset_gb2312_chinese_ci */
case 28: /* my_charset_gbk_chinese_ci */
case 1: /* my_charset_big5_chinese_ci */
case 12: /* my_charset_ujis_japanese_ci */
case 13: /* my_charset_sjis_japanese_ci */
case 95: /* my_charset_cp932_japanese_ci */
case 97: /* my_charset_eucjpms_japanese_ci */
case 19: /* my_charset_euckr_korean_ci */
return true;
default:
return false;
}
}
/** Select the FTS auxiliary index for the given character by range.
@param[in] cs charset
@param[in] str string
@param[in] len string length
@retval the index to use for the string */
UNIV_INLINE
ulint
fts_select_index_by_range(
const CHARSET_INFO* cs,
const byte* str,
ulint len)
{
ulint selected = 0;
ulint value = innobase_strnxfrm(cs, str, len);
while (fts_index_selector[selected].value != 0) {
if (fts_index_selector[selected].value == value) {
return(selected);
} else if (fts_index_selector[selected].value > value) {
return(selected > 0 ? selected - 1 : 0);
}
++selected;
}
ut_ad(selected > 1);
return(selected - 1);
}
/** Select the FTS auxiliary index for the given character by hash.
@param[in] cs charset
@param[in] str string
@param[in] len string length
@retval the index to use for the string */
UNIV_INLINE
ulint
fts_select_index_by_hash(
const CHARSET_INFO* cs,
const byte* str,
ulint len)
{
ulong nr1 = 1;
ulong nr2 = 4;
ut_ad(!(str == NULL && len > 0));
if (str == NULL || len == 0) {
return 0;
}
/* Get the first char */
/* JAN: TODO: MySQL 5.7 had
char_len = my_mbcharlen_ptr(cs, reinterpret_cast<const char*>(str),
reinterpret_cast<const char*>(str + len));
*/
size_t char_len = size_t(cs->cset->charlen(cs, str, str + len));
ut_ad(char_len <= len);
/* Get collation hash code */
cs->coll->hash_sort(cs, str, char_len, &nr1, &nr2);
return(nr1 % FTS_NUM_AUX_INDEX);
}
/** Select the FTS auxiliary index for the given character.
@param[in] cs charset
@param[in] str string
@param[in] len string length in bytes
@retval the index to use for the string */
UNIV_INLINE
ulint
fts_select_index(
const CHARSET_INFO* cs,
const byte* str,
ulint len)
{
ulint selected;
if (fts_is_charset_cjk(cs)) {
selected = fts_select_index_by_hash(cs, str, len);
} else {
selected = fts_select_index_by_range(cs, str, len);
}
return(selected);
}
/******************************************************************//**
Return the selected FTS aux index suffix. */
UNIV_INLINE
const char*
fts_get_suffix(
/*===========*/
ulint selected) /*!< in: selected index */
{
return(fts_index_selector[selected].suffix);
}
#endif /* INNOBASE_FTS0TYPES_IC */
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