cpu_conf: Introduce virCPUDefFilterFeatures

This new internal API can be used for in place filtering of CPU features
in virCPUDef.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

src/conf/cpu_conf.c

@@ -908,6 +908,28 @@ virCPUDefFindFeature(virCPUDefPtr def,
 }
 
 
+int
+virCPUDefFilterFeatures(virCPUDefPtr cpu,
+                        virCPUDefFeatureFilter filter,
+                        void *opaque)
+{
+    size_t i = 0;
+
+    while (i < cpu->nfeatures) {
+        if (filter(cpu->features[i].name, opaque)) {
+            i++;
+            continue;
+        }
+
+        VIR_FREE(cpu->features[i].name);
+        if (VIR_DELETE_ELEMENT_INPLACE(cpu->features, i, cpu->nfeatures) < 0)
+            return -1;
+    }
+
+    return 0;
+}
+
+
 bool
 virCPUDefIsEqual(virCPUDefPtr src,
                  virCPUDefPtr dst,

src/conf/cpu_conf.h

@@ -219,6 +219,11 @@ virCPUFeatureDefPtr
 virCPUDefFindFeature(virCPUDefPtr def,
                      const char *name);
 
+int
+virCPUDefFilterFeatures(virCPUDefPtr cpu,
+                        virCPUDefFeatureFilter filter,
+                        void *opaque);
+
 virCPUDefPtr *
 virCPUDefListParse(const char **xmlCPUs,
                    unsigned int ncpus,

src/libvirt_private.syms

@@ -77,6 +77,7 @@ virCPUDefCopy;
 virCPUDefCopyModel;
 virCPUDefCopyModelFilter;
 virCPUDefCopyWithoutModel;
+virCPUDefFilterFeatures;
 virCPUDefFindFeature;
 virCPUDefFormat;
 virCPUDefFormatBuf;