On 08/10/2012 07:48 AM, Daniel P. Berrange wrote:
From: "Daniel P. Berrange" <berrange@redhat.com>
The code for picking a MCS label is about to get significantly more complicated, so it deserves to be in a standlone method, instead of a switch/case body.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- src/security/security_selinux.c | 75 ++++++++++++++++++++++++++--------------- 1 file changed, 47 insertions(+), 28 deletions(-)
ACK.
+ +static char * +virSecuritySELinuxMCSFind(virSecurityManagerPtr mgr) +{ + virSecuritySELinuxDataPtr data = virSecurityManagerGetPrivateData(mgr); + int c1 = 0; + int c2 = 0; + char *mcs = NULL; + + for (;;) { + c1 = virRandomBits(10); + c2 = virRandomBits(10); + + if (c1 == c2) { + if (virAsprintf(&mcs, "s0:c%d", c1) < 0) { + virReportOOMError(); + return NULL; + } + } else { + if (c1 > c2) { + c1 ^= c2; + c2 ^= c1; + c1 ^= c2;
I know this is just code motion, but is it really that hard to just write the more straightforward: int tmp = c1; c1 = c2; c2 = tmp; which probably optimizes better in the compiler? -- Eric Blake eblake@redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org