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9b7799d527
The LGPL license is used in some legacy code, and to
adhere to current licensing polity, we remove those
files that are no longer used, and reorganize the
remaining LGPL code so it will be GPL licensed from
now on.
Note: This patch only removed LGPL licensed files
in MySQL 5.5 and later, and is the third of a
set of patches to remove LGPL from all trees.
(See Bug# 11840513 for details)
140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/* Copyright (c) 2000, 2011, 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 as published by
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the Free Software Foundation; version 2 of the License.
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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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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* Written by Sergei A. Golubchik, who has a shared copyright to this code */
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#include "ftdefs.h"
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#include "my_compare.h"
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static CHARSET_INFO *ft_stopword_cs= NULL;
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typedef struct st_ft_stopwords
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{
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const char * pos;
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uint len;
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} FT_STOPWORD;
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static TREE *stopwords3=NULL;
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static int FT_STOPWORD_cmp(void* cmp_arg __attribute__((unused)),
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FT_STOPWORD *w1, FT_STOPWORD *w2)
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{
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return ha_compare_text(ft_stopword_cs,
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(uchar *)w1->pos,w1->len,
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(uchar *)w2->pos,w2->len,0,0);
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}
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static void FT_STOPWORD_free(FT_STOPWORD *w, TREE_FREE action,
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void *arg __attribute__((unused)))
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{
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if (action == free_free)
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my_free((void*)w->pos);
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}
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static int ft_add_stopword(const char *w)
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{
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FT_STOPWORD sw;
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return !w ||
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(((sw.len= (uint) strlen(sw.pos=w)) >= ft_min_word_len) &&
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(tree_insert(stopwords3, &sw, 0, stopwords3->custom_arg)==NULL));
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}
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int ft_init_stopwords()
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{
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if (!stopwords3)
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{
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if (!(stopwords3=(TREE *)my_malloc(sizeof(TREE),MYF(0))))
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return -1;
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init_tree(stopwords3,0,0,sizeof(FT_STOPWORD),(qsort_cmp2)&FT_STOPWORD_cmp,
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0,
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(ft_stopword_file ? (tree_element_free)&FT_STOPWORD_free : 0),
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NULL);
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/*
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Stopword engine currently does not support tricky
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character sets UCS2, UTF16, UTF32.
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Use latin1 to compare stopwords in case of these character sets.
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It's also fine to use latin1 with the built-in stopwords.
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*/
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ft_stopword_cs= default_charset_info->mbminlen == 1 ?
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default_charset_info : &my_charset_latin1;
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}
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if (ft_stopword_file)
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{
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File fd;
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uint len;
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uchar *buffer, *start, *end;
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FT_WORD w;
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int error=-1;
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if (!*ft_stopword_file)
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return 0;
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if ((fd=my_open(ft_stopword_file, O_RDONLY, MYF(MY_WME))) == -1)
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return -1;
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len=(uint)my_seek(fd, 0L, MY_SEEK_END, MYF(0));
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my_seek(fd, 0L, MY_SEEK_SET, MYF(0));
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if (!(start=buffer=my_malloc(len+1, MYF(MY_WME))))
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goto err0;
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len=my_read(fd, buffer, len, MYF(MY_WME));
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end=start+len;
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while (ft_simple_get_word(ft_stopword_cs, &start, end, &w, TRUE))
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{
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if (ft_add_stopword(my_strndup((char*) w.pos, w.len, MYF(0))))
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goto err1;
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}
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error=0;
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err1:
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my_free(buffer);
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err0:
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my_close(fd, MYF(MY_WME));
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return error;
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}
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else
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{
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/* compatibility mode: to be removed */
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char **sws=(char **)ft_precompiled_stopwords;
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for (;*sws;sws++)
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{
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if (ft_add_stopword(*sws))
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return -1;
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}
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ft_stopword_file="(built-in)"; /* for SHOW VARIABLES */
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}
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return 0;
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}
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int is_stopword(char *word, uint len)
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{
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FT_STOPWORD sw;
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sw.pos=word;
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sw.len=len;
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return tree_search(stopwords3,&sw, stopwords3->custom_arg) != NULL;
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}
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void ft_free_stopwords()
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{
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if (stopwords3)
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{
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delete_tree(stopwords3); /* purecov: inspected */
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my_free(stopwords3);
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stopwords3=0;
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}
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ft_stopword_file= 0;
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}
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