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From 6ee2c599db989189e639c3de88d20045c62a1d2c Mon Sep 17 00:00:00 2001
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Message-Id: <6ee2c599db989189e639c3de88d20045c62a1d2c@dist-git>
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From: Andrea Bolognani <abologna@redhat.com>
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Date: Tue, 11 Jun 2019 10:55:01 +0200
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Subject: [PATCH] util: Introduce virBitmapUnion()
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Signed-off-by: Andrea Bolognani <abologna@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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(cherry picked from commit 1b2ac8010cc1fe871f538b3f48c5e48213c5c074)
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https://bugzilla.redhat.com/show_bug.cgi?id=1716908
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Signed-off-by: Andrea Bolognani <abologna@redhat.com>
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Message-Id: <20190611085506.12564-2-abologna@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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src/libvirt_private.syms | 1 +
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src/util/virbitmap.c | 27 +++++++++++++++++++++++++++
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src/util/virbitmap.h | 4 ++++
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tests/virbitmaptest.c | 38 ++++++++++++++++++++++++++++++++++++++
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4 files changed, 70 insertions(+)
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diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
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index ee7625b0f3..05c96c29e2 100644
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--- a/src/libvirt_private.syms
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+++ b/src/libvirt_private.syms
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@@ -1476,6 +1476,7 @@ virBitmapSubtract;
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virBitmapToData;
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virBitmapToDataBuf;
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virBitmapToString;
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+virBitmapUnion;
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# util/virbuffer.h
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diff --git a/src/util/virbitmap.c b/src/util/virbitmap.c
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index ef18dad255..49e542a4e6 100644
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--- a/src/util/virbitmap.c
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+++ b/src/util/virbitmap.c
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@@ -1265,6 +1265,33 @@ virBitmapIntersect(virBitmapPtr a,
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}
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+/**
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+ * virBitmapUnion:
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+ * @a: bitmap, modified to contain result
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+ * @b: other bitmap
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+ *
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+ * Performs union of two bitmaps: a = union(a, b)
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+ *
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+ * Returns 0 on success, <0 on failure.
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+ */
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+int
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+virBitmapUnion(virBitmapPtr a,
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+ const virBitmap *b)
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+{
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+ size_t i;
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+
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+ if (a->nbits < b->nbits &&
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+ virBitmapExpand(a, b->nbits - 1) < 0) {
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+ return -1;
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+ }
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+
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+ for (i = 0; i < b->map_len; i++)
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+ a->map[i] |= b->map[i];
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+
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+ return 0;
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+}
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+
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+
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/**
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* virBitmapSubtract:
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* @a: minuend/result
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diff --git a/src/util/virbitmap.h b/src/util/virbitmap.h
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index 312e7e2933..5934508d11 100644
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--- a/src/util/virbitmap.h
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+++ b/src/util/virbitmap.h
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@@ -151,6 +151,10 @@ bool virBitmapOverlaps(virBitmapPtr b1,
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void virBitmapIntersect(virBitmapPtr a, virBitmapPtr b)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
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+int virBitmapUnion(virBitmapPtr a,
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+ const virBitmap *b)
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+ ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
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+
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void virBitmapSubtract(virBitmapPtr a, virBitmapPtr b)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
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diff --git a/tests/virbitmaptest.c b/tests/virbitmaptest.c
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index 2fbafc0a76..cafe865dde 100644
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--- a/tests/virbitmaptest.c
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+++ b/tests/virbitmaptest.c
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@@ -740,6 +740,34 @@ test14(const void *opaque)
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return ret;
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}
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+/* virBitmapUnion() */
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+static int
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+test15(const void *opaque)
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+{
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+ const struct testBinaryOpData *data = opaque;
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+ VIR_AUTOPTR(virBitmap) amap = NULL;
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+ VIR_AUTOPTR(virBitmap) bmap = NULL;
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+ VIR_AUTOPTR(virBitmap) resmap = NULL;
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+
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+ if (!(amap = virBitmapParseUnlimited(data->a)) ||
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+ !(bmap = virBitmapParseUnlimited(data->b)) ||
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+ !(resmap = virBitmapParseUnlimited(data->res))) {
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+ return -1;
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+ }
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+
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+ if (virBitmapUnion(amap, bmap) < 0)
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+ return -1;
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+
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+ if (!virBitmapEqual(amap, resmap)) {
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+ fprintf(stderr,
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+ "\n bitmap union failed: union('%s', '%s') != '%s'\n",
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+ data->a, data->b, data->res);
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+ return -1;
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+ }
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+
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+ return 0;
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+}
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+
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#define TESTBINARYOP(A, B, RES, FUNC) \
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testBinaryOpData.a = A; \
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@@ -798,6 +826,16 @@ mymain(void)
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TESTBINARYOP("0-3", "0,^0", "0-3", test14);
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TESTBINARYOP("0,2", "1,3", "0,2", test14);
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+ /* virBitmapUnion() */
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+ virTestCounterReset("test15-");
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+ TESTBINARYOP("0-1", "0-1", "0-1", test15);
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+ TESTBINARYOP("0", "1", "0-1", test15);
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+ TESTBINARYOP("0-1", "2-3", "0-3", test15);
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+ TESTBINARYOP("0-3", "1-2", "0-3", test15);
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+ TESTBINARYOP("0,^0", "12345", "12345", test15);
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+ TESTBINARYOP("12345", "0,^0", "12345", test15);
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+ TESTBINARYOP("0,^0", "0,^0", "0,^0", test15);
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+
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return ret;
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}
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--
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2.22.0
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