util: bitmap: Add option to allocate bitmap without reporting error

The virBitmapNew() function reports only OOM errors. Split out the
internals into a "quiet" function and add a wrapper that reports the
error.

src/libvirt_private.syms

@@ -1048,6 +1048,7 @@ virBitmapLastSetBit;
 virBitmapNew;
 virBitmapNewCopy;
 virBitmapNewData;
+virBitmapNewQuiet;
 virBitmapNextClearBit;
 virBitmapNextSetBit;
 virBitmapOverlaps;

src/util/virbitmap.c

@@ -54,31 +54,29 @@ struct _virBitmap {
 
 
 /**
- * virBitmapNew:
+ * virBitmapNewQuiet:
  * @size: number of bits
  *
  * Allocate a bitmap capable of containing @size bits.
  *
- * Returns a pointer to the allocated bitmap or NULL if
- * memory cannot be allocated.
+ * Returns a pointer to the allocated bitmap or NULL if memory cannot be
+ * allocated. Does not report libvirt errors.
  */
-virBitmapPtr virBitmapNew(size_t size)
+virBitmapPtr
+virBitmapNewQuiet(size_t size)
 {
     virBitmapPtr bitmap;
     size_t sz;
 
-    if (SIZE_MAX - VIR_BITMAP_BITS_PER_UNIT < size || size == 0) {
-        virReportOOMError();
-        return NULL;
-    }
-
-    sz = (size + VIR_BITMAP_BITS_PER_UNIT - 1) /
-          VIR_BITMAP_BITS_PER_UNIT;
-
-    if (VIR_ALLOC(bitmap) < 0)
+    if (SIZE_MAX - VIR_BITMAP_BITS_PER_UNIT < size || size == 0)
         return NULL;
 
-    if (VIR_ALLOC_N(bitmap->map, sz) < 0) {
+    sz = (size + VIR_BITMAP_BITS_PER_UNIT - 1) / VIR_BITMAP_BITS_PER_UNIT;
+
+    if (VIR_ALLOC_QUIET(bitmap) < 0)
+        return NULL;
+
+    if (VIR_ALLOC_N_QUIET(bitmap->map, sz) < 0) {
         VIR_FREE(bitmap);
         return NULL;
     }
@@ -88,6 +86,28 @@ virBitmapPtr virBitmapNew(size_t size)
     return bitmap;
 }
 
+
+/**
+ * virBitmapNew:
+ * @size: number of bits
+ *
+ * Allocate a bitmap capable of containing @size bits.
+ *
+ * Returns a pointer to the allocated bitmap or NULL if memory cannot be
+ * allocated. Reports libvirt errors.
+ */
+virBitmapPtr
+virBitmapNew(size_t size)
+{
+    virBitmapPtr ret;
+
+    if (!(ret = virBitmapNewQuiet(size)))
+        virReportOOMError();
+
+    return ret;
+}
+
+
 /**
  * virBitmapFree:
  * @bitmap: previously allocated bitmap

src/util/virbitmap.h

@@ -35,6 +35,7 @@ typedef virBitmap *virBitmapPtr;
 /*
  * Allocate a bitmap capable of containing @size bits.
  */
+virBitmapPtr virBitmapNewQuiet(size_t size) ATTRIBUTE_RETURN_CHECK;
 virBitmapPtr virBitmapNew(size_t size) ATTRIBUTE_RETURN_CHECK;
 
 /*