From: Austin Clements <amdragon@MIT.EDU>
Date: Tue, 11 Mar 2014 20:42:00 +0000 (-0400)
Subject: util: Fix two corner-cases in boolean term quoting function
X-Git-Tag: 0.18_rc0~89
X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=commitdiff_plain;h=3fed6736a7ef8b8b1f05d0fabb136bdd3b5917ee

util: Fix two corner-cases in boolean term quoting function

Previously, make_boolean_term did not quote empty boolean terms or
boolean terms that started with '('.  These cases are incompatible
with Xapian: empty terms cannot be omitted, and boolean terms that
start with '(' trigger an alternate term quoting syntax.

Fix this by quoting empty terms and terms that contain '('.
---

diff --git a/util/string-util.c b/util/string-util.c
index 9e2f728f..3e7066cd 100644
--- a/util/string-util.c
+++ b/util/string-util.c
@@ -75,10 +75,12 @@ make_boolean_term (void *ctx, const char *prefix, const char *term,
     int need_quoting = 0;
 
     /* Do we need quoting?  To be paranoid, we quote anything
-     * containing a quote, even though it only matters at the
+     * containing a quote or '(', even though these only matter at the
      * beginning, and anything containing non-ASCII text. */
+    if (! term[0])
+	need_quoting = 1;
     for (in = term; *in && !need_quoting; in++)
-	if (is_unquoted_terminator (*in) || *in == '"'
+	if (is_unquoted_terminator (*in) || *in == '"' || *in == '('
 	    || (unsigned char)*in > 127)
 	    need_quoting = 1;