From: Zhigang Wang <zhigang.x.wang@oracle.com>
To: xen-devel <xen-devel@lists.xensource.com>
Subject: [PATCH]sxp parser: show empty string
Date: Mon, 28 Jun 2010 14:13:14 +0800 [thread overview]
Message-ID: <4C283D7A.1030507@oracle.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 291 bytes --]
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
[-- Attachment #2: xen-unstable-sxp-parser-show-empty-string.patch --]
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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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