From mboxrd@z Thu Jan  1 00:00:00 1970
From: Zhigang Wang <zhigang.x.wang@oracle.com>
Subject: [PATCH]sxp parser: show empty string
Date: Mon, 28 Jun 2010 14:13:14 +0800
Message-ID: <4C283D7A.1030507@oracle.com>
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Hi,

This patch makes the sxp parser show empty string.

Test case:

import sxp

sxp.show(sxp.from_string('(a "")'))
sxp.show(sxp.from_string("(a '')"))

Without this patch:

(a )(a )

With this patch:

(a '')(a '')

Signed-off-by: Zhigang Wang <zhigang.x.wang@oracle.com>

Thanks,

Zhigang

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diff -r b622e411eef8 tools/python/xen/xend/sxp.py
--- a/tools/python/xen/xend/sxp.py	Thu Jun 24 21:56:03 2010 +0100
+++ b/tools/python/xen/xend/sxp.py	Mon Jun 28 14:09:33 2010 +0800
@@ -365,6 +365,8 @@
 def atomp(sxpr):
     """Check if an sxpr is an atom.
     """
+    if sxpr == '':
+        return 0
     if sxpr.isalnum() or sxpr == '@':
         return 1
     for c in sxpr:

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