Fix generation too long headline with ShortWords.

Per http://archives.postgresql.org/pgsql-hackers/2008-09/msg01088.php

diff --git a/src/backend/tsearch/wparser_def.c b/src/backend/tsearch/wparser_def.c
index da644c3c2ec28bf60dfb0913edd4eed947d54329..1943c1143ceed6bd6c3992c7140b726236a42271 100644 (file)
--- a/src/backend/tsearch/wparser_def.c
+++ b/src/backend/tsearch/wparser_def.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/tsearch/wparser_def.c,v 1.18 2009/01/01 17:23:48 momjian Exp $
+ *   $PostgreSQL: pgsql/src/backend/tsearch/wparser_def.c,v 1.19 2009/01/15 16:33:28 teodor Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1921,6 +1921,7 @@ mark_hl_fragments(HeadlineParsedText *prs, TSQuery query, int highlight,
    }
    pfree(covers);
 }
+
 static void
 mark_hl_words(HeadlineParsedText *prs, TSQuery query, int highlight, 
        int shortword, int min_words, int max_words)
@@ -1981,12 +1982,14 @@ mark_hl_words(HeadlineParsedText *prs, TSQuery query, int highlight,
                if (curlen < min_words && i >= prs->curwords)
                {               /* got end of text and our cover is shoter
                                 * than min_words */
-                   for (i = p; i >= 0; i--)
+                   for (i = p - 1; i >= 0; i--)
                    {
                        if (!NONWORDTOKEN(prs->words[i].type))
                            curlen++;
                        if (prs->words[i].item && !prs->words[i].repeated)
                            poslen++;
+                       if ( curlen >= max_words )
+                           break;
                        if (NOENDTOKEN(prs->words[i].type) || prs->words[i].len <= shortword)
                            continue;
                        if (curlen >= min_words)