[libvirt] [PATCH 01/20] Add a virBitmapCopy API

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; Add an API allowing flags from one virBitmapPtr to be copied into another instance. Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; --- src/libvirt_private.syms | 1 + src/util/bitmap.c | 19 +++++++++++++++++++ src/util/bitmap.h | 6 ++++++ 3 files changed, 26 insertions(+) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 0494e1f..8dfb4ce 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -8,6 +8,7 @@ # bitmap.h virBitmapAlloc; virBitmapClearBit; +virBitmapCopy; virBitmapFree; virBitmapGetBit; virBitmapSetBit; diff --git a/src/util/bitmap.c b/src/util/bitmap.c index 53a8a38..cd52802 100644 --- a/src/util/bitmap.c +++ b/src/util/bitmap.c @@ -93,6 +93,25 @@ void virBitmapFree(virBitmapPtr bitmap) } } + +int virBitmapCopy(virBitmapPtr dst, virBitmapPtr src) +{ + size_t sz; + + if (dst->size != src->size) { + errno = EINVAL; + return -1; + } + + sz = (src->size + VIR_BITMAP_BITS_PER_UNIT - 1) / + VIR_BITMAP_BITS_PER_UNIT; + + memcpy(dst->map, src->map, sz * sizeof(src->map[0])); + + return 0; +} + + /** * virBitmapSetBit: * @bitmap: Pointer to bitmap diff --git a/src/util/bitmap.h b/src/util/bitmap.h index c3e6222..1d8750e 100644 --- a/src/util/bitmap.h +++ b/src/util/bitmap.h @@ -42,6 +42,12 @@ virBitmapPtr virBitmapAlloc(size_t size) ATTRIBUTE_RETURN_CHECK; void virBitmapFree(virBitmapPtr bitmap); /* + * Copy all bits from @src to @dst. The bitmap sizes + * must be the same + */ +int virBitmapCopy(virBitmapPtr dst, virBitmapPtr src); + +/* * Set bit position @b in @bitmap */ int virBitmapSetBit(virBitmapPtr bitmap, size_t b) -- 1.7.11.4