[PATCH 03/12] conf: introduce a new func virDomainRNGEquals

[Luyao Huang <lhuang@xxxxxxxxxx>]

virDomainRNGEquals is a func which check if two rng device
are the same.

Signed-off-by: Luyao Huang <lhuang@xxxxxxxxxx>
---
 src/conf/domain_conf.c | 34 ++++++++++++++++++++++++++++++++++
 src/conf/domain_conf.h |  3 +++
 2 files changed, 37 insertions(+)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index aafc05e..91c114e 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -11922,6 +11922,40 @@ virDomainChrRemove(virDomainDefPtr vmdef,
     return ret;
 }
 
+bool
+virDomainRNGEquals(virDomainRNGDefPtr src,
+                   virDomainRNGDefPtr tgt)
+{
+    if (!src || !tgt)
+        return src == tgt;
+
+    if (src->model != tgt->model)
+        return false;
+
+    if (src->rate != tgt->rate || src->period != tgt->period)
+        return false;
+
+    switch ((virDomainRNGModel) src->model) {
+    case VIR_DOMAIN_RNG_MODEL_VIRTIO:
+        switch ((virDomainRNGBackend) src->backend) {
+        case VIR_DOMAIN_RNG_BACKEND_RANDOM:
+            return STREQ_NULLABLE(src->source.file, tgt->source.file);
+            break;
+        case VIR_DOMAIN_RNG_BACKEND_EGD:
+            return virDomainChrSourceDefIsEqual((virDomainChrSourceDef *) src->source.chardev,
+                                                (virDomainChrSourceDef *) tgt->source.chardev);
+            break;
+        case VIR_DOMAIN_RNG_BACKEND_LAST:
+            break;
+        }
+        break;
+
+    case VIR_DOMAIN_RNG_MODEL_LAST:
+        break;
+    }
+    return false;
+}
+
 char *
 virDomainDefGetDefaultEmulator(virDomainDefPtr def,
                                virCapsPtr caps)
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 57297cd..c197095 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2597,6 +2597,9 @@ virDomainChrInsert(virDomainDefPtr vmdef,
 virDomainChrDefPtr
 virDomainChrRemove(virDomainDefPtr vmdef,
                    virDomainChrDefPtr chr);
+bool
+virDomainRNGEquals(virDomainRNGDefPtr src,
+                   virDomainRNGDefPtr tgt);
 
 int virDomainSaveXML(const char *configDir,
                      virDomainDefPtr def,
-- 
1.8.3.1

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