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ebc3b3afac
Don't read character set files if we are using only the default charset. In most cases the user will not anymore get a warning about missing character set files Compare strings with space extend instead of space strip. Now the following comparisons holds: "a" == "a " and "a\t" < "a". (Bug #3152). Note: Because of the above fix, one has to do a REPAIR on any table that has an ascii character < 32 last in a CHAR/VARCHAR/TEXT columns.
128 lines
3.3 KiB
C
128 lines
3.3 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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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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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_handler.h"
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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 mi_compare_text(default_charset_info,
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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((gptr) w->pos, MYF(0));
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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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if (ft_stopword_file)
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{
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File fd;
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uint len;
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byte *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(default_charset_info, &start, end, &w))
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{
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if (ft_add_stopword(my_strdup_with_length(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, MYF(0));
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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((char*) stopwords3,MYF(0));
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stopwords3=0;
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}
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}
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