[PATCH v3 1/3] xen: modify parse_size_and_unit() to support percentage

From: Juergen Gross <jgross@suse.com>
To: xen-devel@lists.xenproject.org
Cc: Juergen Gross <jgross@suse.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Wei Liu <wei.liu2@citrix.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	George Dunlap <George.Dunlap@eu.citrix.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Ian Jackson <ian.jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>,
	Julien Grall <julien.grall@arm.com>,
	Jan Beulich <jbeulich@suse.com>
Subject: [PATCH v3 1/3] xen: modify parse_size_and_unit() to support percentage
Date: Mon, 10 Dec 2018 12:44:20 +0100	[thread overview]
Message-ID: <20181210114422.27275-2-jgross@suse.com> (raw)
In-Reply-To: <20181210114422.27275-1-jgross@suse.com>

Modify parse_size_and_unit() to support a value followed by a '%'
character. In this case ps is required to be non-NULL to ensure the
caller can detect that case. The returned value will be the integer
value s was pointing to and *ps will point to the '%' character.

Signed-off-by: Juergen Gross <jgross@suse.com>
---
 xen/common/lib.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/xen/common/lib.c b/xen/common/lib.c
index 62330205fe..8ebec811b3 100644
--- a/xen/common/lib.c
+++ b/xen/common/lib.c
@@ -476,6 +476,10 @@ unsigned long long parse_size_and_unit(const char *s, const char **ps)
     case 'B': case 'b':
         s1++;
         break;
+    case '%':
+        if ( ps )
+            break;
+        /* fallthrough */
     default:
         ret <<= 10; /* default to kB */
         break;
-- 
2.16.4


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
