1 files changed, 129 insertions, 0 deletions
diff --git a/storage/myisam/ft_stopwords.c b/storage/myisam/ft_stopwords.c
new file mode 100644
index 00000000000..ab51afb0e82
--- /dev/null
+++ b/storage/myisam/ft_stopwords.c
@@ -0,0 +1,129 @@
+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+
+   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; either version 2 of the License, or
+   (at your option) any later version.
+
+   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+/* Written by Sergei A. Golubchik, who has a shared copyright to this code */
+
+#include "ftdefs.h"
+#include "my_handler.h"
+
+typedef struct st_ft_stopwords
+{
+  const char * pos;
+  uint   len;
+} FT_STOPWORD;
+
+static TREE *stopwords3=NULL;
+
+static int FT_STOPWORD_cmp(void* cmp_arg __attribute__((unused)),
+			   FT_STOPWORD *w1, FT_STOPWORD *w2)
+{
+  return mi_compare_text(default_charset_info,
+			 (uchar *)w1->pos,w1->len,
+			 (uchar *)w2->pos,w2->len,0,0);
+}
+
+static void FT_STOPWORD_free(FT_STOPWORD *w, TREE_FREE action,
+                             void *arg __attribute__((unused)))
+{
+  if (action == free_free)
+    my_free((gptr) w->pos, MYF(0));
+}
+
+static int ft_add_stopword(const char *w)
+{
+  FT_STOPWORD sw;
+  return !w ||
+         (((sw.len= (uint) strlen(sw.pos=w)) >= ft_min_word_len) &&
+          (tree_insert(stopwords3, &sw, 0, stopwords3->custom_arg)==NULL));
+}
+
+int ft_init_stopwords()
+{
+  if (!stopwords3)
+  {
+    if (!(stopwords3=(TREE *)my_malloc(sizeof(TREE),MYF(0))))
+      return -1;
+    init_tree(stopwords3,0,0,sizeof(FT_STOPWORD),(qsort_cmp2)&FT_STOPWORD_cmp,
+              0,
+              (ft_stopword_file ? (tree_element_free)&FT_STOPWORD_free : 0),
+              NULL);
+  }
+
+  if (ft_stopword_file)
+  {
+    File fd;
+    uint len;
+    byte *buffer, *start, *end;
+    FT_WORD w;
+    int error=-1;
+
+    if (!*ft_stopword_file)
+      return 0;
+
+    if ((fd=my_open(ft_stopword_file, O_RDONLY, MYF(MY_WME))) == -1)
+      return -1;
+    len=(uint)my_seek(fd, 0L, MY_SEEK_END, MYF(0));
+    my_seek(fd, 0L, MY_SEEK_SET, MYF(0));
+    if (!(start=buffer=my_malloc(len+1, MYF(MY_WME))))
+      goto err0;
+    len=my_read(fd, buffer, len, MYF(MY_WME));
+    end=start+len;
+    while (ft_simple_get_word(default_charset_info, &start, end, &w, TRUE))
+    {
+      if (ft_add_stopword(my_strdup_with_length(w.pos, w.len, MYF(0))))
+        goto err1;
+    }
+    error=0;
+err1:
+    my_free(buffer, MYF(0));
+err0:
+    my_close(fd, MYF(MY_WME));
+    return error;
+  }
+  else
+  {
+    /* compatibility mode: to be removed */
+    char **sws=(char **)ft_precompiled_stopwords;
+
+    for (;*sws;sws++)
+    {
+      if (ft_add_stopword(*sws))
+        return -1;
+    }
+    ft_stopword_file="(built-in)"; /* for SHOW VARIABLES */
+  }
+  return 0;
+}
+
+int is_stopword(char *word, uint len)
+{
+  FT_STOPWORD sw;
+  sw.pos=word;
+  sw.len=len;
+  return tree_search(stopwords3,&sw, stopwords3->custom_arg) != NULL;
+}
+
+
+void ft_free_stopwords()
+{
+  if (stopwords3)
+  {
+    delete_tree(stopwords3); /* purecov: inspected */
+    my_free((char*) stopwords3,MYF(0));
+    stopwords3=0;
+  }
+  ft_stopword_file= 0;
+}