[libvirt PATCHv2 05/16] qemu: agent: expand addrs upfront

[Ján Tomko <jtomko@xxxxxxxxxx>]

qemuAgentGetInterfaceOneAddress returns exactly one address
for every iteration of the loop (and we error out if not).

Instead of expanding the addrs by one on every iteration,
do it upfront since we know how many times the loop will
execute.

Signed-off-by: Ján Tomko <jtomko@xxxxxxxxxx>
---
 src/qemu/qemu_agent.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c
index c6878c8590..0394a72518 100644
--- a/src/qemu/qemu_agent.c
+++ b/src/qemu/qemu_agent.c
@@ -2213,20 +2213,18 @@ qemuAgentGetInterfaces(qemuAgentPtr agent,
         /* If current iface already exists, continue with the count */
         addrs_count = iface->naddrs;
 
+        if (VIR_EXPAND_N(iface->addrs, addrs_count,
+                         virJSONValueArraySize(ip_addr_arr))  < 0)
+            goto error;
+
         for (j = 0; j < virJSONValueArraySize(ip_addr_arr); j++) {
             virJSONValuePtr ip_addr_obj = virJSONValueArrayGet(ip_addr_arr, j);
-            virDomainIPAddressPtr ip_addr;
-
-            if (VIR_EXPAND_N(iface->addrs, addrs_count, 1)  < 0)
-                goto error;
-
-            ip_addr = &iface->addrs[addrs_count - 1];
+            virDomainIPAddressPtr ip_addr = iface->addrs + iface->naddrs;
+            iface->naddrs++;
 
             if (qemuAgentGetInterfaceOneAddress(ip_addr, ip_addr_obj, name) < 0)
                 goto error;
         }
-
-        iface->naddrs = addrs_count;
     }
 
     *ifaces = g_steal_pointer(&ifaces_ret);
-- 
2.26.2