From: Adam Dickmeiss <adam@indexdata.dk>
Date: Tue, 18 Sep 2012 12:32:29 +0000 (+0200)
Subject: relevance: avoid false hits for whitespace tokens
X-Git-Tag: v1.6.19~3
X-Git-Url: http://sru.miketaylor.org.uk/cgi-bin?a=commitdiff_plain;h=bb28a0c5f71636328d7f48a1a1fad1e07f9b8cd7;p=pazpar2-moved-to-github.git

relevance: avoid false hits for whitespace tokens

For example, & could be turned into an empty string. And that
would occur nowhere else, giving a high inverse document frequency!
---

diff --git a/src/relevance.c b/src/relevance.c
index b9fc0e1..a3ee82d 100644
--- a/src/relevance.c
+++ b/src/relevance.c
@@ -50,7 +50,7 @@ static int word_entry_match(struct word_entry *entries, const char *norm_str,
 {
     for (; entries; entries = entries->next)
     {
-        if (!strcmp(norm_str, entries->norm_str))
+        if (*norm_str && !strcmp(norm_str, entries->norm_str))
         {
             const char *cp = 0;
             int no_read = 0;